Abstract: The invention relates to a system for producing an injection silicate gel solution for injection into a soil, comprising a filtering device through which a mixing water can flow for pretreatment, wherein the filtering device comprises at least one filter element for ion exchange, an admixing device for metered admixing of a curing agent, a feeding device for feeding liquid silica sol into the pretreated mixing water, a feeding device for feeding liquid sodium silicate into the pretreated mixing water, and a mixing device for mixing and homogenizing the fed components with the pretreated mixing water for forming an injection silicate gel solution.

Abstract: The invention relates to a method and an arrangement for carrying out construction measures, in particular foundation engineering measures, on a construction site with a number n of construction machines, in particular foundation engineering machines, on which attachment components, in particular construction tools, are fixed in a releasable and changing manner, wherein a number N of attachment components are kept on the construction site, wherein N>n>2.

Abstract: The invention relates to a construction machine for introducing a displacement tube into the ground, wherein the displacement tube comprises a tube base body and, at its lower end, a closure device which comprises at least one closure flap which is adjustable between a closed position, in which the displacement tube is closed downwards by the at least one closure flap, and an open position, in which filling material is discharged from the displacement tube into the ground for forming a filling material column, wherein the construction machine comprises a feed drive for introducing and retracting the displacement tube into and out of the ground, respectively.

Abstract: The invention relates to a method for ground working with an underground construction device which comprises at least one rotary drive unit for rotationally driving a ground working tool and at least one feed unit, by means of which the ground working tool is introduced into the ground for creating a hole, wherein a control and evaluation unit is provided, by means of which setting parameters are acquired and stored during ground working, at least one state value resulting from ground working is acquired and stored and the setting parameters are changed and set by the control and evaluation unit depending on the at least one acquired state value.

Abstract: The invention relates to a construction method and an arrangement for carrying out a construction project involving the production of several foundation elements on a construction site by means of at least one construction apparatus, wherein based on information on starting conditions, in particular on the ground composition, and the at least one construction apparatus as well as specifications for the construction project with the foundation elements to be produced a method sequence with determination of manufacturing parameters for each foundation element to be produced is defined in a computer unit, on the basis of the defined method sequence with the defined manufacturing parameters the production of at least one foundation element is started, during the method sequence actual data are recorded when producing the foundation elements and supplied to the computer unit, the computer unit compares the recorded actual data with target data for the defined method sequence and in the case of a relevant deviation

Abstract: The invention relates to a civil engineering tool for attachment to a civil engineering machine with a carrier, with at least one sensor for acquiring operating data on the civil engineering tool. It is provided according to the invention that arranged on the civil engineering tool is an operating data unit, which is autarkic of the civil engineering machine and which has the at least one sensor and a data storage device, in which the acquired operating data are stored and are retrievable on the civil engineering tool independently of the carrier.

Abstract: The invention relates to a sealing wall building material, which has a binding agent with cement and aggregates. It is provided according to the invention that the binding agent comprises a mixture of cement and fly ash, wherein it is free of clay material, and that it has an impermeability with a kf value of 10?7 m/s and less.

Abstract: The invention relates to a trench cutter having at least one pair of cutting wheels, at least one bearing plate on which the cutting wheels of a pair are rotatably arranged on the two sides of the bearing plate, a base frame on the underside of which the at least one bearing plate is attached, and a cutting wheel drive for driving the cutting wheels via a transmission lubricated with transmission oil in the bearing plate. According to the invention it is provided that at least one heat exchanger is arranged above the bearing plate and that for cooling the transmission oil, an oil circuit is formed to which the at least one heat exchanger is connected above the bearing plate.

Abstract: The invention relates to a construction method, in which an excavation pit is produced in the ground and in the excavation pit foundation elements are produced at predetermined working points with at least one working apparatus. According to the invention provision is made in that in a computer unit the dimensions of the excavation pit, the working points and the dimensions of the at least one working apparatus are entered and in that in the computer unit a required workspace for the at least one working apparatus and an open space in the excavation pit are determined automatically.

Abstract: The invention relates to a method and an arrangement for monitoring a structural foundation in a ground for a structure, wherein ground parameters are determined for the ground, based on the determined ground parameters a preliminary ground model is calculated by means of a computer unit, on which a design of the structural foundation is laid out taking into consideration specification data of the structure to be erected, during and/or after the production of the structural foundation measured values relating to settlements, distortions and/or forces on the structural foundation or the structure are recorded by means of measuring means, the measured values are forwarded to the computer unit which checks if the measured values are consistent with the preliminary ground model, and if the measured values are not consistent with the preliminary ground model, a subsequent ground model, in which the measured values are consistent with the new ground model, is calculated by the computer unit.

Abstract: The invention relates to a construction device and to a method for operating this construction device, comprising a carrier device, an approximately vertical mast, which is mounted on the carrier device, a movement element, which is vertically movable along a linear guide on the mast, and at least one GPS receiving unit, which is arranged in the region of the mast. According to the invention, it is provided that the at least one GPS receiving unit is attached to the movement element and that the at least one GPS receiving unit can be moved between an upper, first measuring position and a lower, second measuring position by means of the movement element.

Abstract: The invention relates to a method for producing a sealing base in the ground in which by injection of a curable grouting compound a plurality of sealing elements is produced in a first soil layer, which elements adjoin one another or overlap, wherein the plurality of sealing elements forms a solid base plate following curing of the grouting compound. It is provided according to the invention that in a second soil layer, which lies beneath the first soil layer for the solid base plate, a gel base is created by injection of a sealing gel, and that the solid base plate and the underlying gel base form the sealing base. The invention further relates to a correspondingly produced sealing base.

Abstract: The invention relates to a method for producing a foundation element in the ground, in which a hole is produced in the ground and a hardenable mass is introduced into the hole, which hardens to form the foundation element. According to the invention provision is made in that an insert body is inserted approximately centrally into the hole, the insert body being spaced apart from a circumferential wall of the hole, wherein a ring-shaped intermediate space is formed between the circumferential wall of the hole and the insert body, and in that a hardenable mass is introduced into the ring-shaped intermediate space, which hardens to form a ring-shaped foundation element.

Abstract: The invention relates to a foundation engineering method and a construction apparatus for producing a columnar structure in the ground, in which a foundation engineering tool is driven in a rotating manner about an axis of rotation and introduced with a feeding motion into a ground, wherein the columnar structure is produced in the ground. According to the invention it is provided that during the production of the columnar structure a rotating motion and a feeding motion of the foundation engineering tool are recorded over time and forwarded to an evaluation unit, in that by means of a sensor means at least one further processing parameter is recorded over time during the production of the columnar structure in the ground and is forwarded to the evaluation unit and in that by the evaluation unit a three-dimensional model of the columnar structure is produced and displayed.

Abstract: The invention relates to a method and a device for producing a foundation element in the ground, wherein a hole is formed in the ground which is filled with a hardenable filling mass in order to form the foundation element. According to the invention provision is made in that prior to the hardening of the filling mass a data carrier is introduced into the hole, on which information on the produced foundation element is stored .

Abstract: The invention relates to a method and a device for producing an injection anchor in the ground, wherein a bore is created in the ground, a hardening material for forming the anchor foot is injected by means of an injection member at least in a partial region of the bore, and after partial, not yet complete, hardening of the material a post-grouting medium is introduced under pressure in a region of the anchor foot via a post-grouting member, by which medium the not yet completely hardened anchor foot is broken up. According to the invention, provision is made for an automatic post-grouting machine to be connected to the post-grouting member, by which machine the post-grouting medium for breaking up the not yet hardened anchor foot is automatically introduced into the post-grouting member at a freely specifiable time.

Abstract: The invention relates to a trench cutter and a method for producing a cut trench in the soil having a cutter frame, at least one pair of cutting wheels which are supported and driven in a rotatable manner on a lower end of the cutter frame, wherein each cutting wheel has a plurality of cutting teeth along its outer circumference, and a supply and/or discharge means for supplying or discharging a cutting liquid to or from the cut trench in the region of the cutting wheels. According to the invention provision is made in that spaced from the supply and/or discharge means a cleaning device is provided for cleaning the cutting wheels during the cutting operation with a cleaning fluid and in that the cleaning device has a plurality of cleaning nozzles which are directed onto the outer circumference of at least one cutting wheel and designed to inject the cleaning fluid to loosen adhering soil material.

Abstract: The invention relates to an auger arrangement and a method for forming an auger arrangement having a first drill part and a second drill part which are of tubular or bar-shaped design and in which at least one drill part is provided on its external side with an auger flight, wherein on at least one of their end regions the drill parts have matching connecting sections, wherein a first connecting section is designed as a sleeve-like female part with keyway elements and a second connecting section is designed as a mandrel-like male part with keyway elements, wherein male part and female part are plugged axially into each other to form a releasable, torque-proof connection.

Abstract: The invention relates to a foundation engineering method and a construction apparatus for producing a columnar structure in the ground, in which a foundation engineering tool is driven in a rotating manner about an axis of rotation and introduced with a feeding motion into a ground, wherein the columnar structure is produced in the ground. According to the invention it is provided that during the production of the columnar structure a rotating motion and a feeding motion of the foundation engineering tool are recorded over time and forwarded to an evaluation unit, in that by means of a sensor means at least one further processing parameter is recorded over time during the production of the columnar structure in the ground and is forwarded to the evaluation unit and in that by the evaluation unit a three-dimensional model of the columnar structure is produced and displayed.

Abstract: The invention relates to a method for producing a sealing base in the ground in which by injection of a curable grouting compound a plurality of sealing elements is produced in a first soil layer, which elements adjoin one another or overlap, wherein the plurality of sealing elements forms a solid base plate following curing of the grouting compound. It is provided according to the invention that in a second soil layer, which lies beneath the first soil layer for the solid base plate, a gel base is created by injection of a sealing gel, and that the solid base plate and the underlying gel base form the sealing base. The invention further relates to a correspondingly produced sealing base.