Abstract: An apparatus for removable insertion into an excavated trench to protect a worker against collapse of the trench wall, which is often termed in industry as a trench shield or cage or box, comprises cross members interconnecting opposite sides of a protective peripheral wall that are in the form of rounded annuluses. Additional members are provided to interconnect adjacent pairs of annuli which are spaced one from the other in a height direction of the wall. This forms an interconnected internal frame of the apparatus which primarily provides compressive strength of the apparatus against collapsing of the trench wall instead of the protective wall so that the protective wall may be made to be lighter in terms of mass. Further, the protective peripheral wall forms a tube substantially fully enclosing a working area defined by the wall.

Abstract: A method to automatically optimize waveform captures from an electrical system includes capturing at least one energy-related waveform using at least one Intelligent Electronic Device (IED) in the electrical system. The at least one captured energy-related waveform is analyzed to determine if the at least one captured energy-related waveform is capable of being compressed, while maintaining relevant attributes for characterization, analysis and/or other use. In response to determining the at least one captured energy-related waveform is capable of being compressed, while maintaining relevant attributes for characterization, analysis, and/or use, the at least one captured energy-related waveform may be compressed using at least one compression technique to generate at least one compressed energy-related waveform. One or more actions may be taken based on or using the at least one compressed energy-related waveform.

Abstract: An excavation support system and methods for installing and using same. The system includes a corner cart having a generally vertical back plate having a front surface, a back surface, a top end, and a bottom end; a generally horizontal base plate having a top side and a bottom side, the base plate attached to the back plate at about a 90-degree angle, proximate the bottom end of the back plate; at least one roller, connected to the back plate, extending from the back surface thereof, and a corner swivel brace disposed on the top side of the base plate and connected to the front surface of the back plate.

Abstract: A system for shoring a trench, which is dug for receiving a pipeline and includes spaced apart sidewalls, includes at least two supporting units that are spaced apart from one another in the longitudinal direction of the trench and configured for absorbing transverse forces from the sidewalls. Disposed between the two supporting units is a plurality of shoring units, each configured for supporting the sidewalls of the trench. Together with the supporting units, the shoring units are configured to form a barrier-free lowering space within which the pipe can be lowered into the trench from outside the trench to the floor of the trench. A method for laying a pipe using the shoring system is also disclosed.

Abstract: Corrugated metal pipe repair system and method, an embodiment including the securing of one or more sheets to the corrugated pipe and over a damaged portion of the pipe including voids, the delivering of glass particles into the voids and possibly also cavities in ground adjacent to the corrugated metal pipe, and the delivering of a polymer that expands to fill at least a portion of the voids and possibly also a portion of the cavities not filled by the glass particles.

Abstract: A soldier pile wall for shoring an excavation site includes a plurality of drilled shafts drilled along an edge of the excavation site, a plurality of soldier piles, each of the plurality of soldier piles being positioned within a respective drilled shaft, and a pre-stressing system coupled to at least some of the plurality of soldier piles. The pre-stressing system is configured to induce stresses to counteract working stresses of the soldier pile wall. Related methods are also provided.

Abstract: Methods and equipment have been developed that combine the use of continuous miners, flexible conveyor trains, and longwall mining techniques to provide flexible and efficient removal of resources from subterranean formations. Some mining operations use a powered roof support comprising: a canopy configured to directly contacts a roof of a mine; a base configured to rest on a floor of the mine, the base comprising a spill plate and a push cylinder with a maximum stroke greater than 11 feet; and a pair of hydraulic legs attaching the canopy to the base.

Abstract: Forcing equipment meant for forcing piles, steel profiles and other elongated objects into the ground which forcing equipment comprises a body (1) which can be attached to a working machine, a vibration device (6) attached to the body (1) with the help of damper cushions (9) and moveable grip jaws (10) adjusted to the mentioned vibration device (6) in order to grip the object to be forced at least with a side grip. The body (1) comprises an upper part (2) including an attachment arrangement (4), (5) for attaching it to the working machine and side parts directed from the upper part (2) downwards between which side parts the vibration device (6) and grip jaws (10); (17, 18) can be attached through cassette (7) comprising damping rubbers (9) in which case the attachments comprise pin/hole attachments (11, 23, 14); (20, 8) or (21, 8) which can be opened by detaching the mentioned pins (11, 20, 21).

Abstract: Embodiments of the invention comprise a system for strengthening a sloped structure such as a berm, basin, levee, or embankment. The comprises first and second opposing sides, the second side being adjacent the sloped structure; a bottom side adjoining bottom edges of the first and second sides, thereby forming a cavity within the first, second, and bottom sides; fill material disposed within the cavity; an impermeable membrane encapsulating at least a portion of the fill material; and a plurality of reinforcing members disposed within the fill material.

Abstract: A system and method provides for repair/reconstruction of bridge and culvert constructions. Geosynthetically confined soils are used in combination with soil nails. The soil nails provide additional tensile strength below the areas reinforced with the geosynthetically confined soils. The soil nails may include both horizontal and vertical soil nails. Various forms of vertical tensioning support can be provided to include soil nails, micro-piles, sheet piling, and the like. The confined soils are installed at locations under and adjacent to the man made constructions, and can be provided in both symmetrical and asymmetrical configurations. For bridge constructions, the confined soils may be installed at a desired depth under the bridge girders, and under other primary support members of the bridge. Horizontal nails may be installed under and adjacent to the confined soils.

Abstract: Systems for installing roof support sheets on a mine roof. One system includes a support frame, a lifting system, and a feeding system. The support frame holds a plurality of roof support sheets. The lifting system lifts at least one of the sheets from the support frame. The feeding system obtains the at least one sheet from the lifting system and feeds the at least one sheet toward an installation apparatus for installation on the mine roof. The lifting system includes a shoe and at least one arm for moving the shoe to engage and move the at least one sheet. The feeding system includes a drive assembly and a support. The drive assembly engages and moves the at least one sheet toward the installation apparatus, and the support supports the at least one sheet moved by the drive assembly.

Abstract: A panel includes a core having a top, a bottom, a first side and a second side. The panel includes a first cap disposed on the top. The panel includes a second cap disposed on the bottom. The panel includes a first grid disposed adjacent the first side. The panel includes a second grid disposed adjacent the second side. The first cap and the second cap and the first grid and the second grid defining a frame which envelopes and holds the core without piercing through the core. A stopping. An overcast. A method for building a wall.

Abstract: A panel assembly of a trench box has a frame, a receptacle affixed within the frame, a connector having one end portion received in the receptacle at an opposite end portion extending outwardly of the frame, and a pipe having one end affixed to the opposite end portion of the connector member and extending outwardly therefrom. The connector member has a flange extending radially outwardly therefrom. This flange bears directly or indirectly against either or both of the receptacle and the frame.

Abstract: An explosive-resistant mine seal (2) is provided, which includes a pair of block walls (14, 16). An adhesive (22) is provided between adjoining surfaces of the blocks (20) where the adhesive (22) has greater strength properties than the blocks (20) themselves. A core member (18, 18?) is provided between the two walls (14, 16) and is bound thereto. The adhesive (22) may be coated over the walls (14, 16) to increase the strength of the mine seal (2).

Abstract: A tunnel barrier (11) adapted to seal a mine tunnel, the tunnel barrier (11) comprising an inflatable bladder having a front wall (14), a rear wall (15) and a side wall (16) and being adapted to be inflated by a suitable gas, wherein the side wall is adapted to contact the tunnel walls, including the roof and floor to thereby seal the tunnel.

Abstract: There is provided a mesh system (2) comprising a mesh sheet (4) and a reinforcing member in the form of a cable (6) coupled to one side of the sheet (4). The cable (6) is coupled to the mesh by wire ties (7). Two lengths (6a) and (6b) of the cable (6) may overlap or be disposed in a mutually adjacent manner. The lengths (6a) and (6b) may be coupled together by U-bolts or crimped bands (9), which may also engage the underlying sheet (4).

Abstract: The present invention relates to a tunnel reinforcement structure capable of controlling ground displacement using pressurization, including: reinforcements adapted to be forcedly inserted into the bored holes formed along the outer surface of the section to be excavated of the tunnel; auxiliary reinforcements disposed between the reinforcements from a point between 4 m and 8 m inwardly from the ends of the reinforcements; steel ribs disposed on the inner four faces of the excavation face of the tunnel; pressurizing bags each provided between the steel ribs and the excavated inner surface of the tunnel; a concrete part adapted to be cast between the steel ribs; and lining concrete adapted to be cast to the steel ribs and the inner surface of the concrete part.

Abstract: An apparatus and method for engaging a member within a soil formation. The apparatus comprises a shaft extending between top and bottom ends along a central axis and having at least one auger section therearound and a first plate, axially rotatably connected to the shaft. The apparatus may further comprise a second plate rotatably connected to the shaft above the first plate which may have connectors for engagement with a corresponding adjacent plate. The method comprises locating the shaft above a soil formation and rotating the shaft into the soil formation so as to draw the first plate into the soil formation.

Abstract: In a method for lining tunnel walls or ceilings with protective nets or the like, web-shaped protective net material is unwound from a reel and is fastened to the tunnel walls or ceiling by tie bolts. The reel is rotatably arranged. The rotation of the reel about a shaft is controlled in order to unwind the protective net material, the shaft being mechanically moved in steps along the tunnel walls or ceiling together with the reel. The protective net material unwound in each step is preferably stretched and mechanically fastened. The individuals carrying out these processes are thus not exposed to any direct risk, while the lining process can be accelerated.

Abstract: A telescopic shoring system for shoring open excavations comprises rail posts composed by at least an outer member and an inner member, and large shoring panels. Each outer and inner member of the rail post has laterally, on either side, at least one panel guide allowing the shoring panels to slide within. The outer member of the rail post has a frontal guide adapted to interlock the back guide provided to the inner member but sliding relatively to each other. The shoring panels are arranged on each side of the excavation while the rail posts are placed on each corner holding on either side the shoring panels, which create a multi-stepped shoring box. The outer members of the rail post with shoring panels create an outer or upper shoring box while the inner members of the rail post in combination with shoring panels create an inner or lower shoring box.

Abstract: A cofferdam module can include first and second side panels, outer support members that are each coupled to the outer side of one of the side panels, and two different types of inner support members that are each coupled to the inner side of each of the side panels.

Abstract: The bulkhead anchoring system includes a plurality of concrete slabs which are sufficiently heavy to remain in place on a bottom surface of a waterway, due to high suction produced by the bottom of the waterway on the slabs. The slabs are positioned close to or adjacent the bulkhead. Risers extend vertically upwardly from the concrete slabs, at the rear corners thereof, positioned such that the risers are in contact with the bulkhead. The risers are concrete if the waterway is saltwater or can be galvanized steel if the waterway is fresh water.

Abstract: A system for installation of sheet pile including a sheet pile installation apparatus having a substantially rigid elongate beam with an upper end and a lower end, and at least one drive finger proximal the lower end of the substantially rigid elongate beam; and a sheet pile having an elongate member with an upper end and a lower end, and a first side and a second side, the first side having a male profile lock and the second side having a female profile lock, the sheet pile further including at least one receiver proximal the lower end for receiving the at least one drive finger of the sheet pile installation apparatus.

Abstract: A mine rib support for bracing a vertical mine rib disposed between a mine floor and a mine roof. The support includes an elongated upright and continuous telescopically expandable support having a preset curvature. The member is longitudinally expanded for engaging the mine floor and the mine roof under compression with the curvature facing towards the mine rib. A support plate is laterally extended from the support member into compression engagement with the mine rib, thereby prestressing the support for support of the mine rib.

Abstract: Provided is a cage for protecting a worker in an excavation. The cage includes spaced apart side panels formed from a material suitably-strong to withstand a force exerted on the side panels by a collapsing wall of the excavation. A plurality of cross members extend between the side panels to substantially maintain a distance separating the side panels when subjected to the force exerted by the collapsing wall of the excavation. And a connection head that is cooperable with a coupler supported by a boom of a piece of mechanized equipment is included to couple the cage to the boom. The connection head is coupled to one or both of the side panels, one or more of the cross members, or one or both of the side panels and at least one of the cross members.

Abstract: A rib support system, a rib support device, a rib support method, a method for manufacturing a rib support device, and a computer readable medium are provided as described herein. The rib support device is configured to support a mine or tunnel rib (or wall) or roof to prevent spalling, and to provide safety and long term protection of tunnel (or open) areas. The rib support device may be made from a high density polyethylene (HDPE) material, or the like, that is resistant to corrosion, has superior overall performance and strength, has few (or no) sharp edges, is light weight, and is easy to handle.

Abstract: Hollow rebar may be used for structural reinforcement in a drilled shaft and to provide access tubes for a sonic integrity testing probe. Rebar (short for reinforcing bar) is steel bar used as a tensioning device in reinforced concrete that holds the concrete in compression. According to the system described herein, hollow rebar may provide high strength reinforcement in the drilled shaft while at the same time providing an access tube for a sonic integrity testing process, such as crosshole sonic logging (CSL). The high strength hollow rebar, having ridges, threads and/or other appropriate surface deformations, provides improved adhesion to concrete, thus eliminating the problem of debonding associated with non-structural access tubes made of smooth PVC or steel pipe.

Abstract: A system and method of constructing a mechanically stabilized earth (MSE) structure is provided. A wire facing is composed of horizontal and vertical elements, where a soil reinforcing element is coupled to the wire facing at one or more crimps formed in either of the horizontal or vertical elements. A connection device may be inserted through an opening defined between the soil reinforcing element and the one or more crimps such that the soil reinforcing element may be coupled to the wire facing. A strut may be coupled to the top-most cross wire of the vertical element and the terminal wire of the horizontal element to maintain the vertical element at a predetermined angle with respect to the horizontal element as backfill is added to the wire facing.

Abstract: A pumpable inflatable crib bag assembly for supporting a mine roof which includes a generally cylindrical bag having top and bottom ends for retaining and confining a liquid settable grout to be pumped into the bag. The bag further includes an inner generally cylindrical mesh reinforcement disposed within and generally coextending with the bag. This generally cylindrical mesh reinforcement is spaced from an inner wall of the bag and is permeable to the liquid settable grout whereby the liquid settable grout may be pumped through a fill port into the bag to thereby fill the bag and encapsulate the mesh reinforcement. The liquid settable grout is pumped through a fill port which is adjacent the top end of the bag.

Abstract: A high-strength anchor system for anchoring a support to mine strata is disclosed. The system includes an anchor plate and a connecting member on the anchor plate for connection of the support to the anchor plate. Anchor bolts extend through bolt holes in the anchor plate into bore holes in the mine strata. Load-spreading devices extend from respective bolt holes in the anchor plate into the bore holes. The load-spreading devices have outside diameters larger than outside diameters of the anchor bolts for spreading shear loads exerted on the anchor bolts over larger areas of the mine strata. A method of installing such a system and a safe room bulkhead using such a system are also disclosed.

Abstract: A process for making a panel for supporting the sidewalls of an excavation includes a plate, longitudinal members and vertical members. Each longitudinal member includes a first leg extending along the length, substantially parallel to and spaced laterally from the plate. The first leg of each longitudinal member being located adjacent and secured to the first leg of another member. A second leg, integral with the first leg, extends along the length, away from the first leg and toward the plate, the second leg being secured to the plate. Axially spaced vertical members are welded to the plate and to the longitudinal members.

Abstract: Provided is a construction support, a length of which can be precisely and easily adjusted to a floor-to-floor height between upper and lower floor slabs, capable of supporting the load of the upper floor slab in a more stable and firm manner and performing dismantlement in a more convenient manner. The construction support includes a first pipe, a second pipe, an inner stopper, an outer stopper, and an outer cap.

Abstract: Cylindrical, interconnected stacked vertical sleeves provide a vertical pit (or shaft shoring system) for use in subterranean construction projects. Large-diameter, interlocking fiberglass, plastic, or polymeric sleeves have an interlocking portion at the top and a second interlocking portion at the bottom, which allow sleeves to be safely and securely seated upon each other to build the vertical pit up to 20 feet deep. Lifting rings on the interior wall of the cylinders allow lifting, placement, and removal by a crane or other piece of heavy lifting equipment.

Abstract: A system and method of constructing a mechanically stabilized earth (MSE) structure. A wire facing is composed of horizontal and vertical elements. A soil reinforcing element has a plurality of transverse wires coupled to at least two longitudinal wires where the longitudinal wires are coupled to a coil and a threaded rod is configured to extend through both the vertical facing and the coil. A washer engages the vertical facing and prevents the threaded rod from passing completely through the vertical facing and a nut is threaded onto the threaded rod to prevent its removal from the coil. Multiple systems can be characterized as lifts and erected one atop the other to a desired MSE structure height.

Abstract: A soil shoring method is provided wherein a pilot hole is drilled into the soil to a desired depth. A cutting tool is then used to cut an elongated trench or slot in the soil at the desired depth and in a desired configuration. During the drilling and cutting processes, a slurry is preferably provided into the hole and the slot to help support the walls of the hole and slot. After the cutting tool is removed from this slot, shoring plates are inserted into the slot. Then, soil on one side of the plates is excavated, without any cave-in risk.

Abstract: A berm to increase capacity of an existing landfill comprises a reinforced portion and backfill material. The landfill comprises a waste-receiving recess having a surface and an outer perimeter, an edge surface peripherally adjacent at least a portion of the outer perimeter, and an existing accumulation of waste within the recess having a collective top surface. The reinforced portion has opposing inner and outer surfaces and comprises structural fill material and a plurality of reinforcing members disposed therein. The backfill material has an inner surface adjacent the inner surface of the reinforced portion. The backfill material comprises contaminated fill material and is at least partially encapsulated by an impermeable membrane. At least a portion of the berm sits on at least a portion of the edge surface of the landfill. Portions of the berm are substantially parallel to corresponding portions of the outer perimeter.

Abstract: This invention discloses a telescopic shoring system comprising rail posts composed by at least an outer member and an inner member, and large shoring panels. The outer member and inner member of the rail post have laterally, on either side, at least one panel guide allowing the shoring panels to slide within. The outer member of the rail post has a frontal guide adapted to interlock the back guide provided to the inner member but sliding relatively to each other. The shoring panels are arranged on each side of the excavation while the rail post are placed on each corner holding on either side the shoring panels which create a multi-stepped shoring box. The outer members of the rail post with shoring panels create an outer or upper shoring box while the inner members of the rail post in combination with shoring panels create an inner or lower shoring box.

Abstract: An underground earth retention strut construction method using a horizontal frame structure is disclosed, in which since a vertical member is formed after a horizontal frame structure is first installed and completed, it is possible to minimize any interference between the vertical member and the horizontal frame structure for thereby achieving an easier construction and enhancing a construction quality. The interval of the temporary vertical member is widened during an underground excavation work, so that the ground excavation work is easy. The improved horizontal frame structure of an architecture comprises a pair of straight members which are connected by at least one plate; and a “#”-shaped connection member which is connected at a portion in which the straight members cross with each other.

Abstract: An ecological restoration block installed to a predetermined height along rivers or river banks. The ecological restoration block includes a body, having a first cell in which earth and sand are stored, and second and third cells for storing water, provided on respective sides of the first cell, with partitioning walls therebetween, a first migration channel, formed diagonally on a front part of the body to make movement of animals possible, a cover provided on an upper part of the body to open an upper side of the first cell, and a flow pipe, which crosses the first cell and connects internal space of the second and third cells. The ecological restoration block of this invention can effectively preserve wild animals and plants by providing protective habitat at the front part of the body and by allowing the animals to move freely through the first and fourth migration channels.

Abstract: Improved erosion control systems are provided which, in some embodiments, may comprise large, porous aggregate stabilized with a continuous mesh and a polymeric binding agent. In some embodiments, an erosion control system may include an aggregate layer comprising porous aggregate having a particle size of at least 7.5 mm and containing no more than 5% by weight of smaller particles; a continuous mesh disposed at an upper surface of the aggregate layer; and a polymer adhesive affixing at least some aggregate particles to each other and affixing the mesh to some of the aggregate particles, wherein the polymer adhesive permanently binds the aggregate and mesh such that the system remains porous. The polymer may be applied in-situ after the mesh has been placed on the aggregate.

Abstract: A handling device for depositing a trench box into an open excavation includes at least one reciprocal trench box wall contact member movable along a first axis; motor means for selective movement of the wall contact member; and a coupling for attaching the contact member and the motor means to a prime mover for selectively moving the handling device along an axis generally perpendicular to the first axis. A system for depositing a trench box in an open excavation includes the handling device and a trench box having a plurality of apertures engageable with the at least one wall contact member. A method for depositing a trench box in an open excavation includes operating the handling device with the trench box having the apertures.

Abstract: A socket wrench attachment (SRA) is connected by a circular array of bolts (28) connecting the mounting flange (30) to the rotary output member (22) on a rotary output shaft (20). The shaft (20) is a part of a rotary drive mechanism (12) which is mounted for longitudinal travel along a tower (14).

Abstract: A center beam connection assembly for temporary shoring includes a pair of end-caps adapted to fit over respective ends of a center shoring beam. Arms extending from each end-cap engage a web of a main shoring beam in a excavation site shoring system. The end-caps may be used alone, or in combination with reinforcing and spacer bars. Reinforcing bars include first and second hooks adapted to connect to a main shoring beam and a center shoring beam, respectively. When utilized, each spacer bar is connected to at least one tab on an end-cap and at least one tab on a reinforcing bar via connecting pins. In this manner, one or more center shoring beams can span an excavation hole to provide removable, reusable and temporary support for a shoring system.

Abstract: A hydraulic sliding insertion panel comprises a reinforced concrete poling board (1), a flow guide tube (2) is set in the poling board (1) and a water distributing pipe (3) communicated with the flow guide tube (2) is set in the bottom of the poling board; moreover, a slideway (5) and a slide plate (6) are set on the two sides of the poling board (1) respectively, and an erection loop (8) is set on the top of the poling board.

Abstract: A trench shoring or shielding unit, for securing the sidewalls of an earthen formation, trench or excavation, includes a plurality of adjustable, vertically arranged panels forming a protective wall. As a shielding unit, two opposing protective walls are spaced and attached by at least two spreader bars. Each adjustable panel has opposing top and bottom ends, a C-shaped channel traversing the panel's height, and opposing side edges that inter-engage with the side edges of adjacent panels. Further, each adjustable panel is attached to at least one of two or more whalers along an inner surface of the panel by a clamp-like fastener having a bolt passing through the whaler and into the C-shaped channel of the corresponding panel. The inter-engaging side edges are segmented, preferable concave and convex, so that adjacent adjustable panels inter-engage to resist lateral torque or twisting that may be caused by shifting or collapse of the excavation.

Abstract: A roof stabilizer for use in securing surfaces in tunneling and mining is disclosed and claimed. The stabilizer has a tube with a slot and a ring attached to the bottom end of the tube. The ring can have indicia on a bottom surface of the ring or a side surface of the ring or both. The location of the indicia can provide better indication of the properties of the stabilizer to the installer. The indicia is easier to read than that of the background art both before and after installation. The location of the indicia can also provide easer and quicker visual inspection of already installed stabilizers to verify that the proper roof stabilizers were installed. The location of the indicia lessens the likelihood that corrosion will remove the indicia making it unidentifiable. The stabilizer disclosed and claimed also allows the use of grout or an adhesive in the interior of the tube which does not cover up or conceal the indicia on the ring as opposed to indicia in the background art stabilizers.

Abstract: A hydraulic lifting device including a main beam, two or more connection plates fixedly connected to the main beam, at least two legs, each leg pivotably attached to two of the plates, at least two hydraulic cylinders, each cylinder disposed between the beam and one of the legs, and two or more load connectors.

Abstract: A blast protective barrier system, termed a blast wall, providing a security perimeter or boundary at and above a ground level definable in terms of an x, y, z coordinate system, includes several substantially ground level (xy plane) pile caps, each itself having a y-axis elongate length, a x-axis width, and a z-axis depth, the x-axis substantially defining the width of the barrier system. Each pile cap also includes an upper and lower xy plane surface, each of the upper surfaces including y-axis channels and each of the lower surfaces including several recesses. The system also includes a first, second and further modules having a plurality of opposing pairs of yz plane, the y-axis elongate concrete panels including opposing integral xz end cap elements having a high shock-absorptive structure for isolating each module from the effect of a blast upon an adjacent module.

Abstract: A portable and adjustable trench support for placement within a trench for shoring up and maintaining the integrity of the trench walls so that workers can work safely within the trench includes a pair of support plates disposed within the trench and against the opposed trench walls, and the support plates including on their interior sides a pair of support arm guides with each support arm guide having a vertical channel and a number of offsets so that support arms can be slid within the channels and vertically positioned in the desired offsets wherein the pair of support arms mounted to the support arm guides of one support plate have larger diameters than the support arms mounted to the opposite support arm guides thereby allowing for the telescopic slidable insertion of the smaller diameter support arms into the larger diameter support arms, and then connected thereto so that the spacing of the support plates can accommodate trenches of various widths.

Abstract: A connection arrangement for temporary shoring in an excavation site is used to secure I-beams together at corners within the excavation site. Typically, four I-beams are connected together to form a rectangular frame that is suspended within the excavation for bracing the shoring walls thereof. However, any polygonal shape may be used. The connection arrangement includes mating socket or connecting members which are placed over the ends of I-beams to be fastened together. One of the connecting members includes an outwardly extended tab while the other includes a pair of outwardly extended tabs. The first outwardly extending tab fits between the two extending tabs of the corresponding connecting member. All of the tabs are provided with apertures which are placed in alignment when the connection is made so that a bolt or pin can be passed through the apertures to secure adjacent connecting members together.