Abstract: A multi-functional wooden pole according to an embodiment of the present disclosure has improved erectness due to a tendon is proposed. The multi-functional wooden pole is capable of maintaining a stable erection state while easily responding to a wind load even when an object having a predetermined weight is installed on an upper side of the wooden pole in a longitudinal direction thereof.

Abstract: An installation method of a bent cap for mutually restraining adjacent pier studs in a prefabricated and assembled bridge is provided. A bent cap mold base is configured in a form of a bent cap, which includes fixedly arranging limiting steel rings at two ends of a rectangular frame and vertically arranging steel bar sleeves in the limiting steel rings, hoisting the cap bent mold base on top portions of adjacent two prefabricated pier studs, such that pier stud pre-embedded steel bars protruding from the top portions of the two prefabricated pier studs are correspondingly inserted into the steel bar sleeves at two ends of the bent cap mold base one by one, and limiting the adjacent two prefabricated pier studs in the bent cap mold base.

Abstract: The present invention provides a cross beam of a canopy, which addresses the problem that existing cross beams cannot simultaneously ensure convenience of assembly and guarantee stability in use. The present cross beam of a canopy comprises a plurality of hollow elongated beams, an inner side surface of each of the beams has at least one protruding and elongated protrusion along a length direction of the beams, each of the protrusions is provided with an mounting hole or a mounting groove penetrating along the length direction of the beams, at least one long rod is inserted into the mounting holes or the mounting grooves to connect all the beams in series, and two ends of the long rod protrude out of the beams and are detachably connected with a locking fastener respectively. The present invention ensures convenience of installation and guarantees the assembled cross beam has good stability.

Abstract: The disclosure presents a composite conduit formwork structure which includes a cylindrical outer casing adapted to bond with a cylindrical inner casing which are maintained at a fixed distance apart by a plurality of radial stanchions. The inner casing and outer casing form an interior void which is filled with concrete during manufacture. The outer casing and inner casing remain in place to protect the structure once completed. A novel method of assembly is also provided whereby radial stanchions are rotated between the outer casing and inner casing. All of the components in a preferred embodiment are formed of a fiberglass material.

Abstract: Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

Abstract: The present invention discloses a prestressed-bolted dry-assembled segmental precast hybrid tower with grouting-free, comprising a top steel tower tube, a reverse self-balancing steal-concrete transition section, and a prestressed-bolted dry-assembled segmental precast concrete tower with grouting-free dry fast splicing and a gear reinforced wind turbine foundation; the steel tower tube, the steel-concrete transition section, the concrete tower tube and the hollow wind turbine foundation are integrally connected from top to bottom through a prestressed steel strand system to improve the overall bending resistance of the tower; the upper end of the prestressed steel strands is anchored to the steel-concrete transition section, and the lower end is anchored to the bottom face of the wind turbine foundation corbel; the concrete tower tube is composed of a number of segmental tapered precast concrete tower segments, which are grouting free spliced vertically, and the vertical splicing utilizes positioning pins to

Abstract: A stealth pole includes a plurality of canister sections, each of the plurality of canister sections including a spine, a first splice plate located on a first end of the spine, a second splice plate located on a second end of the spine, and a canister cover that covers the spine, the first splice plate and the second splice plate. A method for reinforcing the stealth pole includes removing the canister cover from at least one of the plurality of canister sections; attaching a plurality of stiffener members to the first splice plate and the second splice plate; and applying tension, compression or a combination thereof to the plurality of stiffener members. The plurality of stiffener members reinforce the spine of the canister section. A reinforced stealth pole is also described.

Abstract: Dry mortar mixture characterized by a glass mixture of expanded glass beads with a grain size d/D 0/8, mixed in a ratio of between 1:1 and 1:3, with a binding mixture of hydraulic binders and stone granules in the weight ratio of 1:2 to 1:4. The glass has a discontinuous grain distribution. For the glass mixture the fractions 0.5/1.0 and 2.0/4.0 are present while a fraction intermediate other fractions are absent. Preferably the fractions 0.25/0.5 and 1.0/2.0 are absent. For the glass mixture preferably all grain sizes between 1.0 and 2.0 mm are absent. The grain size distribution is around an average, so that an open structure is obtained.

Abstract: A column cover system includes a first column skin, a second column skin, and a column joint vertically connecting the first column skin and the second column skin. The column joint includes at least one monolithic column joint portion that defines an upper retaining ring and a lower retaining ring. When assembled, the first column skin is seated within the upper retaining ring and the second column skin is seated within the lower retaining ring.

Abstract: A tower for a wind turbine includes at least one tower section made of concrete, made up of several annular concrete segments arranged on top of one another with horizontal joints. Each concrete segment includes at least two annular segment prefabricated concrete parts arranged in parallel with vertical joints. The each have one outer side, one inner side and one upper, lower and two lateral contact faces. The concrete segments are connected to one another in the vertical direction by vertical clamping devices.

Abstract: Methods for refurbishing a wind turbine are provided. A method includes removing an existing machine head and existing top tower section from the wind turbine. The wind turbine further includes a lower tower section, the lower tower section comprising a top flange, the top flange defining a first plurality of fastener holes disposed in a first hole pattern. The method further includes connecting a new machine head and new top tower section to the wind turbine. The new top tower section comprises a bottom flange, the bottom flange defining a second plurality of fastener holes disposed in a second hole pattern. The second hole pattern matches the first hole pattern.

Abstract: A post-tensioning wrap includes a housing having at least one cavity and at least one tendon bonded to the housing. The wrap can be wrapped around the concrete article to equalize compression. Thereafter, a medium is injected into the cavity causing the housing to swell and compression of the concrete article by the tendon.

Abstract: A pole assembly includes a chuck, and the chuck includes a chuck body with opposed fastener openings extending therethrough, and a shank. The pole assembly includes a socket piece, and the socket piece includes a conduit fitting body and a socket piece body, and opposed fastener openings extending through the conduit fitting body, and a socketed body opening extending through the socket fitting body. The pole assembly includes a conduit which extends through a distal chuck body opening of the chuck and an unsocketed body opening of the conduit fitting body.

Abstract: A pole base provides a secure mounting structure that can easily be adapted for use with multiple configurations of poles. The pole base may include a body having an upper portion and a pole attachment device disposed on or within the upper portion of the body. The pole attachment device may be a plate configured to removeably receive a plurality of fasteners such that each of the plurality of fasteners may be received in the separate plate in a plurality of locations. Alternatively, the pole attachment device may be a plurality of recesses formed within the upper portion of the body.

Abstract: A concrete tower construction has a foundation and a plurality of prefabricated concrete tower elements, each having an outside, an inside, a material thickness provided there between, and top and bottom surfaces. The tower elements have hollow centers and are arranged one tower element on top of another, forming a column on top of the foundation. Plural tendons arranged in the hollow center apply tension force to the column. An upper force distribution element is arranged on top of the column, and a lower force distribution element is arranged in the foundation. Each tendon is connected to the upper force distribution element and the lower force distribution element by cooperating attachments. Methods of erecting the tower construction, tower elements and a foundation are described.

Abstract: A tower includes a plurality of stacked sections extending in a longitudinal direction from a base section to a top section. At least one of the stacked sections includes a first block and a second block joined together. The first block and the second block have interlocking portions such that a first portion of the first block is located above a first portion of the second block in the longitudinal direction.

Abstract: It comprises at least one shell portion for forming a shell segment of a wind turbine tower and a flange portion attached to the shell portion. The flange portion comprises flange sectors separated from each other by corresponding spaces defining a discontinuous flange portion. The shell portion includes apertures formed in correspondence with the spaces between adjacent flange sectors. The flange sectors are formed with at least one base portion extending from at least one face of the shell portion at an angle to the shell portion. The base portion may have a varying thickness.

Abstract: Structures with interlocking components include a plurality of interlocking structure sections, each of the interlocking structure sections including at least one tensioning component and a plurality of compression components carried by the at least one tensioning component. The at least one tensioning component secures alternating ones of the plurality of compression components in adjacent ones of the plurality of interlocking structure sections in end-to-end, interlocking compression with each other.

Abstract: An improved mechanically secured block building system generally for concrete masonry structures comprising a masonry block unit with a height and width essentially one-half the length of the unit, with multiple cavities through the block and with a recessed channel; an anchor bar with a plurality of threaded and non-threaded apertures in a special configuration to match the cavities in the block unit and able to lay in the recessed channel of the block; and a fastener wherein the mechanical secured block building system can be assembled in unique ways due to a cube effect of the masonry block to construct multiple width walls, grade beams, and horizontal decks. An alternative embodiment includes the preferred mechanical secured block building system further comprised of (d) a footer block and (e) a footer plate.

Abstract: A series of spans of column shaft (1) with a frustoconical shape, each span integrating two or more parts (2) and (3) with a polygonal or circular section formed with pieces prestressed in a bed in the factory, with centered or slightly deviated prestressing (4) and non-prestressed reinforcement (5) in the perimeter of the section or fibers, attached by means of wet or dry longitudinal joints (6), rotated in plan view or not, and transverse joints (7) which can be at different levels and provide continuity or not to the general prestressing, for a joining by means of steel bars (12), and in the case of the attachment to the foundation with direct positioning of the starter bars at the time said foundation is built, or by means of jacket tubes which will subsequently receive the mentioned bars (16).

Abstract: The present disclosure describes a system for joining a gondola to the concrete tower of an aerogenerator, wherein the concrete tower is formed by a lower annular section, one or several intermediate annular sections and an upper annular section, including a flat annular support which is inserted between an upper surface of the upper annular section of the tower and the lower surface of a yaw bearing that supports the gondola, the flat annular support comprising orifices wherethrough a plurality of joining means pass, each of which is fixed to the bottom of the upper annular section of the tower and to the bottom of the yaw bearing.

Abstract: Disclosed are apparatus and corresponding methodology for providing a base support, such as including concrete, and used such as for a wind-driven generator. Precast concrete cylinders are stacked in place upon a platform that may be partially precast and partially cast in place during assembly and supported, in certain embodiments, by plural concrete legs, the other ends of which are supported on a unitary or subdivided concrete foundation. In other embodiments, the platform may be supported by ribbed concrete panels. The concrete cylinders are glued together using an epoxy and then secured by an internal vertical post tension system extending from the platform to the upper most cylinder. Different types of concrete are used between upper and lower sections of the stacked cylinders. The lower section uses reinforced concrete while the upper section used ultra high performance fiber reinforced concrete.

Abstract: The invention describes a tower-shaped supporting structure (1), at least portions of which are hollow, with a plurality of interconnected prestressed concrete elements (2, 4), each of the prestressed elements (2) having a plurality of elongate prestressing means (10), more particularly wires or stranded cables, the majority of which are guided into an adjacent prestressed concrete element (4) and anchored there under tensile stress, characterised in that the prestressing means (10) have at least at one end a form-fitting means and the prestressing means (10) in the adjacent prestressed element (4) are anchored via at least one end anchoring element (12), which is connected to the prestressing means (10) via the form-fitting means.

Abstract: Disclosed are apparatus and corresponding methodology for providing a base support, such as including concrete, and used such as for a wind-driven generator. Precast concrete cylinders are stacked in place upon a platform that may be partially precast and partially cast in place during assembly and supported, in certain embodiments, by plural concrete legs, the other ends of which are supported on a unitary or subdivided concrete foundation. In other embodiments, the platform may be supported by ribbed concrete panels. The concrete cylinders are glued together using an epoxy and then secured by an internal vertical post tension system extending from the platform to the upper most cylinder. Different types of concrete are used between upper and lower sections of the stacked cylinders. The lower section uses reinforced concrete while the upper section used ultra high performance fiber reinforced concrete.

Abstract: The invention relates to a mast (10) for a wind turbine, which mast tapers towards the top and comprises at least two superposed annular mast sections (12, 14, 16, 18, 20). Every annular mast section consists of a plurality of prefabricated wall parts (A, B, C, D, E, F), wherein at least a part of which has a curved section, at least the curved sections of prefabricated wall parts in different annular mast sections having at least identical cross-section.

Abstract: A system and method for forming a wall is disclosed. In some embodiments, the wall comprises blocks having internal couplers configured for use with rods which can be inserted through and which are configured to securely lock blocks together. In some embodiments, the rods which are inserted into internal couplers may be threaded or have another locking features such that the blocks in a wall can be securely fastened together.

Abstract: A post-tensioned precast segmental concrete tower has a stack of annular segments with uniform cross-sections which varies over the tower height. The transition between tower segments occurs in stages and is achieved using annular members or segments which support and anchor post-tensioning tendons that transfer loads passing through the tower as a result of a change in tower geometry. The tower segments are match cast against one another in fabrication to create tight matching opposing surfaces when placed into the tower and to create tight joints. The match casting eliminates the need for grout between precast segments, resulting in a faster tower erection time and high durability of the joints. All annular segments have horizontal joints and no vertical joints. The tower geometry simplifies the formwork system used to precast the segments, and the post-tensioning tendons tie all segments together and to the foundation.

Abstract: Disclosed are apparatus and corresponding methodology for providing a base support, such as including concrete, and used such as for a wind-driven generator. Precast concrete cylinders are stacked in place upon a platform that may be partially precast and partially cast in place during assembly and supported, in certain embodiments, by plural concrete legs, the other ends of which are supported on a unitary or subdivided concrete foundation. In other embodiments, the platform may be supported by ribbed concrete panels. The concrete cylinders are glued together using an epoxy and then secured by an internal vertical post tension system extending from the platform to the upper most cylinder. Different types of concrete are used between upper and lower sections of the stacked cylinders. The lower section uses reinforced concrete while the upper section used ultra high performance fiber reinforced concrete.

Abstract: A system and method for fabricating a wind turbine tower is provided. The method includes providing at least one fiber reinforced plastic (“FRP”) strand, embedding a first portion of the FRP strand into a first concrete segment, and embedding a second portion of the FRP strand into a second concrete segment such that a third portion of the FRP strand extends from the first concrete segment to the second concrete segment. The method further includes displacing at least one of the first concrete segment and the second concrete segment relative to the other such that a tension is applied to the third portion of the FRP strand.

Abstract: Provided are a tower that has a sufficient yield strength and enables connection between tower sections without requiring a high manufacturing accuracy of the tower sections, and a wind turbine generator having the tower. The tower includes a plurality of tower sections formed by dividing the tower along planes that are parallel to a horizontal plane, and is constituted by connecting end surfaces of the tower sections to each other. The tower further includes a tensile member that has one end supported by a first supporting part at a first tower section among the tower sections, has another end supported by a second supporting part at a second tower section among the tower sections or at a tower base on which the tower is vertically installed, and is stretched along an inner wall of the tower sections so as to have a predetermined tensile force.

Abstract: A tower structure for a wind energy turbine, wind power, renewable energy, and other uses made of concrete, steel-reinforced concrete or other materials, and a method of manufacture thereof are described. The structure includes several pre-fabricated tower lengths, each tower length having at least three pre-fabricated wedges, such that a central protruding edge of each wedge approaches or lies at a center line of the tower structure when assembled. Tower lengths higher in the tower may be narrower and may be made up of fewer wedges than lower tower lengths. Each tower length may also include several apertures or channels adapted to accommodate a cable joining all the tower lengths of the tower. Also, tower lengths may have a circular or polygonal outer ring made up of bracing elements, each bracing element arranged when assembled to brace one or more wedges.

Abstract: A concrete filled tubular steel column includes a longitudinally extending vertical tubular steel shell and an inner tubular steel member disposed at the center of the steel shell. A plurality of spaced vertical steel plates extend from the inner members toward but not abutting the steel shell. In addition a plurality of horizontally disposed perforated pipes extend outwardly from the inner member and have a plurality of meltable polymer plugs or caps to prevent plastic cement from flowing into or closing the openings. In the event of fire the plastic or polymer plugs or caps melt and allow gases and smoke to flow into the pipes and up through the inner member and out therefrom at the top of the column.

Abstract: An assembly of precast concrete units matingly assembled on top of one another to form a whole deck footing, capable of supporting a deck, shed, porch, addition or other structure. The individual units are of manageable weight and can be moved by one person, not unlike a bag of unmixed cement. The units interlock to prevent shifting, separating, frost damage by water infiltration and heaving when placed under ground.

Abstract: Disclosed are apparatus and corresponding methodology for providing a base support, such as including concrete, and used such as for a wind-driven generator. Precast concrete cylinders are stacked in place upon a platform that may be partially precast and partially cast in place during assembly and supported, in certain embodiments, by plural concrete legs, the other ends of which are supported on a unitary or subdivided concrete foundation. In other embodiments, the platform may be supported by ribbed concrete panels. The concrete cylinders are glued together using an epoxy and then secured by an internal vertical post tension system extending from the platform to the upper most cylinder. Different types of concrete are used between upper and lower sections of the stacked cylinders. The lower section uses reinforced concrete while the upper section used ultra high performance fiber reinforced concrete.

Abstract: Presented is a modular building unit that includes a top end with a top surface, a bottom end with a bottom surface; a first plate assembly embedded in the top end, and a second plate assembly embedded in the bottom end. The first plate assembly includes a first plate with a threaded hole, a plurality of anchoring rods coupled to the first plate and embedded in the top end, and a threaded rod mated with the threaded hole. One end of the threaded rod is embedded in the top end and the other end extends out of the top end. The second plate assembly includes a second plate with an unthreaded hole, and a plurality of anchoring rods coupled to the second plate and embedded in the bottom end.

Abstract: Disclosed are apparatus and corresponding methodology for providing a base support, such as including concrete, and used such as for a wind-driven generator. Precast concrete cylinders are stacked in place upon a platform that may be partially precast and partially cast in place during assembly and supported, in certain embodiments, by plural concrete legs, the other ends of which are supported on a unitary or subdivided concrete foundation. In other embodiments, the platform may be supported by ribbed concrete panels. The concrete cylinders are glued together using an epoxy and then secured by an internal vertical post tension system extending from the platform to the upper most cylinder. Different types of concrete are used between upper and lower sections of the stacked cylinders. The lower section uses reinforced concrete while the upper section used ultra high performance fiber reinforced concrete.

Abstract: A tower is provided having a foundation, at least one concrete tower section located above the foundation and one or more upper tower sections. An adapter section is located between the concrete tower section and one of the upper tower sections. The adapter section is connected to one of the upper tower sections by a fastening system and to the foundation by a plurality of tensioning cables, which are configured to induce a compressive force on the concrete tower section. The fastening system and the plurality of tensioning cables are substantially vertically aligned so that tower loads are transmitted from the upper tower sections to the plurality of tensioning cables.

Abstract: An anchoring assembly part for a wind turbine tower, which part is in a ring- or ring segment shape and prefabricated from a concrete material, and which has at least one projecting reinforcement element for the connection with a lower tower portion made of a concrete material, and at least one bore for receiving an anchor bolt for the detachable connection with an upper tower portion made of steel, an anchor sleeve with an internal thread for screwing in the anchor bolt being arranged in said bore.

Abstract: A concrete tower is provided. The concrete tower may be a concrete tower for a wind turbine. The compressive strength of the concrete is changed in dependency of the height of the tower. The concrete tower includes a number of tendons that are arranged to pre-stress the concrete tower. Each tendon is anchored with the concrete tower at a first end of the tendon and at a second end of the tendon.

Abstract: The pre-cast concrete structure of the present invention comprises a lower unit structure 110 having the lowest stage unit structure 111, the middle stage unit structure 112, and the highest stage unit structure 113 which are vertically orderly piled on another and wedged from each other; a middle unit structure 130 having the lowest stage unit structure 131, the middle stage unit structure 132, and the highest stage unit structure 133 which are vertically orderly piled on another and wedged from each other; and a upper unit structure 150 having the lowest stage unit structure 151, the middle stage unit structure 152, and the highest stage unit structure 153 which are vertically orderly piled on another and wedged from each other.

Abstract: The present invention provides a wind generator tower and a process for assembly thereof. A truncated conical tower assembled from reinforced concrete modules disposes of a tensioning system which provides greater resistance to the same and, in turn, the joints defined between the modules which form the tower are sealed.

Abstract: A system for constructing masonry block walls having spaced-apart pilasters and panels supported by and extending between the pilasters. In certain embodiments, the pilasters are constructed from stacks of pilaster blocks which are secured together using at least one vertical, post-tensioned reinforcing member, without the use of grout to connect the reinforcing members to the pilaster blocks. The pilasters are constructed from at least two laterally spaced-apart stacks of pilaster blocks positioned on opposite sides of the wall. The panels are constructed from courses of panel blocks, and do not require the use of mortar to connect adjacent blocks. The pilasters provide an arrangement in which a panel can supported in an upright position by virtue of one end portion being positioned between two stacks of blocks of a first pilaster and the opposite end portion of the panel being positioned between two stacks of blocks of a second pilaster.

Abstract: Prefabricated modular tower of the kind used as a support for wind generators and other applications uses reduced-thickness prefabricated elements which are reinforced with an internal structure of horizontal and vertical stiffeners, preferably made of reinforced concrete. The elements are tensioned both horizontally and vertically by flexible metal cables. The main advantages of the invention are that it enables fast construction of very high towers using a limited number of elements. The elements are not heavy and are easy to transport, all of which leads to savings in manufacturing, transport and installation costs.

Abstract: The invention concerns a method of erecting a pylon of prestressed concrete finished parts and an apparatus for advantageously carrying out the method. In order to at least reduce the problems present in the state of the art when erecting a pylon, there is provided a funnel-shaped apparatus 8 for guiding a tensioning wire, the smaller cross-section 11 thereof being substantially the same as that of the jacket tube 7. There is further provided a seal 20 for producing a pressure-tight transition between two mutually superposed segments 4, 6, wherein the height of the seal 20 substantially corresponds to the intended spacing of the segments. Also provided is a prestressed concrete finished part 4, 6 in which the apparatus 8 according to the invention is integrated. Finally there is provided a method in which epoxy resin is used as a composite joining material 34 between two segments.

Abstract: A pre-stressed segmented concrete tower for wind power generators is described, and a method for its fabrication, wherein in a pyramidal structure is formed by prefabricated segments, the structure comprising three rounded walls formed with semi-circular segments, and three flat walls, formed with flat segments between the semi-circular walls. One standard curved mold is used for the semi-circular walls, and the flat walls are fabricated horizontally, over templates.

Abstract: A system and method for fabricating a wind turbine tower is provided. The method includes providing at least one fiber reinforced plastic (“FRP”) strand, embedding a first portion of the FRP strand into a first concrete segment, and embedding a second portion of the FRP strand into a second concrete segment such that a third portion of the FRP strand extends from the first concrete segment to the second concrete segment. The method further includes displacing at least one of the first concrete segment and the second concrete segment relative to the other such that a tension is applied to the third portion of the FRP strand.

Abstract: A circular concrete cap foundation poured in-situ within a perimeter forming corrugated metal pipe set atop or within an excavated pit and enclosing a series of circumferentially spaced pile anchors. The circular concrete cap foundation supports sets of inner and outer circumferentially spaced tower anchor bolts having their lower ends anchored to an embedded anchor ring and their upper ends projecting vertically and upwardly out the top of the circular foundation to engage the base flange of a supported tower. The pile anchors are formed with perimeter corrugated metal pipes set deep in subsurface soils with cementitious material surrounding and partially bonding to a centralized steel bolt or tendon which extends through the cap foundation. The tower anchor bolts and the pile anchor bolts are both partially encased in a PVC sleeve so that the bolts can be post-tensioned. The pile anchors are in tension only and serve to pull the cap foundation down to compress the underlying ground soils.

Abstract: A precast post-tensioned segmental pole system capable of supporting a load is provided. The pole system includes a plurality of pole segments that use connectors and strands to anchor them together. The strands extend within a cavity formed in the pole segments and are external to the wall structure of the pole segments. The strands may be coupled between both of the pole segments, or be anchored to a connector. The connector includes an upper piece that is coupled to one pole segment, and a lower piece that is coupled to the other pole segment. Upper and lower pieces interlock with each other to join the pole segments to one another. The strands are placed in tension so that pole system is capable of withstanding forces imposed by the load.

Abstract: The present invention relates to a system and method for constructing a pre-stressed modular construction for supporting or retaining an applied load. In particular, the present invention relates to a system and method for pre-stressed modular retaining walls. The system comprises a plurality of header stacks constructed from a variety of header units. The header stacks are coupled by structural members. Active reinforcement elements are used to induce a pre-stressing force into the header stacks to support or retain the applied load. A method for constructing the modular construction is provided.

Abstract: The present invention relates to a system and method for constructing a pre-stressed modular construction for supporting or retaining an applied load. In particular, the present invention relates to a system and method for pre-stressed modular retaining walls. The system comprises a plurality of header stacks constructed from a variety of header units. The header stacks are coupled by structural members. Active reinforcement elements are used to induce a pre-stressing force into the header stacks to support or retain the applied load. A method for constructing the modular construction is provided.