The present disclosure provides a method of biocementation comprising contacting a granular, cohesionless soil with a solution, wherein the solution comprises urea, urease, a source of calcium ions, and a source of non-urease proteins, wherein the urea, urease, source of calcium ions, and source of non-urease proteins are provided in effective amounts suitable to cause crystallization of calcium carbonate.

The present disclosure provides a method of biocementation comprising contacting a granular, cohesionless soil with a solution, wherein the solution comprises urea, urease, a source of calcium ions, and a source of non-urease proteins, wherein the urea, urease, source of calcium ions, and source of non-urease proteins are provided in effective amounts suitable to cause crystallization of calcium carbonate.

A fluidized sand composition for use as a filling material for sinkholes and the like weakened ground cavities. The fluidized sand composition is produced by mixing graded sand, water, a fluidizer, a plasticizer, and a surface active agent. The fluidized sand composition is easily injected into the ground cavity of a sinkhole. After filling, the fluidized sand composition will return to the solid natural condition according to the effect of plasticizer previously added. The fluidized sand composition allows for compaction, soil stabilization, permits water migration through the material, and can be easily excavated.

The present invention aims to provide an interlocking stabilization system (100) for stabilizing slope, unrestrained earth or the like. Accordingly, the interlocking stabilization system (100) includes: a) a compressed bearing plate (110); b) at least one earth anchor (150) having a plurality of extendable pivotally hinged wings (152) penetrated to a predetermined depth and in communication with the compressed bearing plate (110) through a tendon bar/wire (160); wherein the compressed bearing plate (110) is adapted to be compressed and advanced toward the at least one earth anchor (150) through the tendon bar/wire (160), such that a reflective frustum cone or compact soil reaction (112) is formed thereof; wherein the plurality of extendable pivotally hinged wings (152) of the at least one earth anchor (150) is able to extend outwardly to an angle as the earth anchor (150) is progressively withdrawn under the compression, such that a frustum cone or end bearing force (154) is formed thereof; and wherein action-reaction forces (reflective frustum and end bearing force) defined between the compressed bearing plate (110) and progressively with-drawn of the at least one earth anchor (150) through the tendon bar/wire (160) are able to eliminate or overcome the active and passive zone pressures existed in the slope, unrestrained earth or the like.

A system for injecting expanding resins into soils to be consolidated, includes a pump apparatus which is operationally associated, at a delivery port, with a tubular element which can be inserted into a respective hole defined in the soil to be consolidated and is adapted to send to the tubular element a mixture at a preset supply pressure. The tubular element has a number of holes, at least two of the holes including respective calibrated holes.

A system for injecting expanding resins into soils to be consolidated, includes a pump apparatus which is operationally associated, at a delivery port, with a tubular element which can be inserted into a respective hole defined in the soil to be consolidated and is adapted to send to the tubular element a mixture at a preset supply pressure. The tubular element has a number of holes, at least two of the holes including respective calibrated holes.

The disclosure provides a measurement set-up for a return cement suspension, a construction site arrangement with a measurement set-up, and a method which can be carried out inexpensively, reliably, and easily.

The disclosure provides a measurement set-up for a return cement suspension, a construction site arrangement with a measurement set-up, and a method which can be carried out inexpensively, reliably, and easily.

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.

Embodiments of a dry mix for producing a concrete composition are provided. The dry mix includes aggregate, cement, and bed ash. The bed ash contains the combustion product of a fluidized bed coal combustion reaction. Additionally, embodiments of a method of preparing the dry mix and embodiments of a method of preparing a concrete composition are provided. The dry mix is also suitable for repairing soil slips, and embodiments of a method of repairing a soil slip are also provided.