Waterproof grout-stopping device at jacking pipe entry portal and construction method thereof

The invention relates to a waterproof grout-stopping device at a jacking pipe entry portal and a construction method thereof. The waterproof grout-stopping device at the jacking pipe entry portal is fixedly connected with a walling crib which is fixedly provided with a brush holder, a walling crib brush and an oil injection pipe are fixedly arranged at the inner side of the brush holder, the walling crib brush is circularly arranged between a jacking pipe and the brush holder, is in a ring clamping structure formed by an inner thin iron sheet, an outer iron sheet and an elastic steel wire inside, the brush body of the walling crib brush is arranged at the well entry and bends towards the jacking pipe, the brush head is tightly adhered to the outer wall of the jacking pipe and blocks a gap between the jacking pipe and wall rocks, the brush holder is also fixedly provided with the oil injection pipe the outlet of which extends into the interlayer of the walling crib brush, a grout injection ...

Refuse landfill structure constructed by reinforced soil on valley high and steep slope

The invention relates to the field of slope transformation, in particular to a refuse landfill structure constructed by reinforced soil on a valley high and steep slope. The refuse landfill structure comprises a bottom layer anti-seepage system and a side slope anti-seepage system, the bottom layer anti-seepage system is arranged at the bottom of a side slope, and the side slope anti-seepage system is arranged on the surface The side slope anti-seepage system comprises a backfill anti-seepage structure and an anti-seepage layer structure, and the backfill anti-seepage structure is connected with the side slope surface and the anti-seepage layer structure. The backfill anti-seepage structure is formed by a single-layer structure; the single-layer structure comprises a one-way geogrid, a gunny bag part, backfill materials and a clay layer, the bottom of the backfill material at the bottommost layer is connected with the bottom layer anti-seepage system, the one-way geogrid is arranged at ...

Variable-diameter drill hole dynamic pressure water burst rapid plugging device and using method

The invention discloses a variable-diameter drill hole dynamic pressure water burst rapid plugging device and a using method, and relates to the technical field of underground hot water resource exploiting.The lower portion of the outer wall of a casing pipe is fixedly sleeved with a fixed support, and the fixed support is used for abutting against a step of a drill hole and dividing the drill hole into two parts in the axis direction; the water stop plate is used for being arranged on the upper portion outside the casing pipe in a sleeving mode and making contact with the ground, all the grouting pipes penetrate through the water stop plate and extend into a drill hole, and the positions, extending into the drill hole, of the multiple grouting pipes are different from one another; the bottom end of the orifice pipe is connected with the top end of the sleeve, the side pipe is arranged on one side of the orifice pipe, the second valve is arranged on the side pipe, the mixing pipe is connected ...

Steel reinforced concrete fore shaft beam and method for supporting foundation pit

The invention discloses a reinforced concrete locking beam and a method for supporting a foundation trench using the same. The locking beam is composed of concrete and reinforcement, wherein the prestressed reinforcement with a sleeve is vertically installed on one side of the locking bean close to the foundation trench. The method for supporting the foundation trench using the locking beam comprises the steps of: constructing the locking beam by the post-tensioning method, connecting a cantilever type supporting structure as a whole, supporting the two ends of the locking beam on the trench wall or a supporting pile, and fixing with an anchor rod or an anchor rope; and excavating the planar foundation trench. The inventive locking beam can give full play to the tension resistant role of the prestressed reinforcement, which can be easily recovered and repeatedly used; and has high side-movement resisting stiffness and high carrying capacity. The inventive method for supporting the foundation ...

Foundation pit supporting pile using pipe casting pile embedding in rock

Foundation pit supporting pile using pipe casting pile embedding in rock

The invention relates to a foundation pit supporting pile socketed by pipe pile, which includes an upper supporting cast-in-place pile and a lower socketing pipe pile. The supporting cast-in-place pile consists of the pile body concrete and the pile body reinforcing bars, and the diameter of the pile hole is 0.8 to 2.0mm; the socketed pipe pile is formed by inlaying the pipe into the foundation rock, with cement slurry poured; the upper part of the pipe is inserted into the supporting cast-in-place pile and connected with the pile body reinforced bars. The invention adopts a drilling rig to conduct hole drilling, pipe laying and cast-in-place of the pipe at the hole opening, during which the diameter of the small holes is big, the number of holes is small, the pipe laying is highly correct, the cost is low and the construction speed is very high; the socketed pipe pile connects the foundation pit and the supporting cast-in-place pile which makes full use of the strength of the rock and ...

Synchronous grouting material used for tunnel and preparation method thereof

The invention discloses a synchronous grouting material used for a tunnel and a preparation method thereof. The grouting material is the grout which is prepared by taking sediment grout as a main raw material, wherein the sediment grout comprises 30 to 65 percent of clay and fine sand totally and the weight ratio of soil to sand in the sediment grout is 0.1-0.18:1; and adding 80 to 120 kg of cement, 300 to 450 kg of coal ash, 200 to 500 kg of water or mud water and 3 to 10 kg of sodium carboxymethyl cellulose into per cubic meter of the sediment grout, wherein the grout density is between 1.85 and 2.05 g/cm<3> and the grout consistency is between 10.5 and 12 cm. In the preparation method, sediment and the mud water generated in a construction process are adopted as grouting materials, so that the sediment and the mud water can be changed into treasure from waste; and therefore, the preparation method has the characteristics of great reduction of the dosage of high-energy consumption cement ...

Leaching-extracting integrated system and test method

The invention provides a leaching-extraction integrated system and a test method, and the system comprises a rectangular main body sand box used for containing polluted soil, and the opposite side surfaces of the main body sand box are provided with permeable stone plates; the leaching system is communicated with the top of the main body sand box; the extraction system is communicated with the top of the main body sand box and is positioned at the downstream of the leaching system; the groundwater circulation system simulates groundwater circulation; the data acquisition system comprises sensors and a data receiving end, the data receiving end is in signal connection with the sensors, the multiple sensors are arranged in an array mode in the horizontal direction and the vertical direction, and the sensors comprise a soil pressure sensor, a water potential sensor and a water level sensor. By adjusting experimental parameters and comparing mutual influences between the two under different ...

Method for monitoring three-dimensional deformation of foundation pit

The invention discloses a method for monitoring three-dimensional deformation of a foundation pit. The method is used for the field of construction safety monitoring. The method includes: acquiring monitored picture information of a slope of the foundation pit through photographing of a measurement camera, then utilizing close-range photogrammetric technology to perform information processing on monitored pictures, acquiring three-dimensional coordinates of monitoring points of the slope of the foundation pit, acquiring three-dimensional coordinates at different time points via photographing at different moments, drawing a tendency chart of the three-dimensional coordinates, changing over time, of all the monitoring points, and acquiring displacements of all the monitoring points in the monitoring process so as to predict deformation tendency of each monitoring point. Compared with the prior art, the method has the advantages that a large amount of physical information and geometrical information ...