8results about How to "Increase the grouting pressure" patented technology

The invention provides a tunnel leakage repairing device, and belongs to the technical field of tunnel maintenance. Comprising a grout storage tank, a grouting pump, a grout pumping pipe, a Tesla valve pipe, a grout inlet pipe, a grout return pipe, an expansion joint and a grouting needle, and the grout storage tank is used for storing grouting materials; the grouting pump is connected with the grout storage tank so as to extract grouting materials; one end of the slurry pumping pipe is connected with the grouting pump; a port A and a port B are formed in the two ends of the Tesla valve pipe respectively, and a port C is formed in the middle of the Tesla valve pipe and connected with the other end of the slurry pumping pipe; one end of the slurry inlet pipe is connected with a port B of the Tesla valve pipe; one end of the slurry return pipe is connected with the port A of the Tesla valve pipe, and the other end is connected with the slurry storage tank; the expansion joint is arranged on the slurry return pipe, expands when the pressure inside the slurry return pipe is higher than a first preset pressure and shrinks when the pressure inside the slurry return pipe is lower than a second preset pressure; and the grouting needle head is connected with the other end of the grout inlet pipe. The grouting pressure is easy to control, manpower can be saved, and potential safety hazards are reduced.

The application relates to a deep-water pebble covering layer buried type lock steel pipe pile cofferdam water stop construction method, a steel casing is first inserted and driven at a designed insertion and driving position of a steel pipe pile, the steel pipe pile is inserted and driven to a rock layer below a pebble covering layer, a large-diameter steel pipe pile hole is formed, then clay is backfilled in the steel casing, and the steel casing is pulled out; a plurality of slurry outlet holes are formed on a pipe wall of a lower end of the steel pipe pile in advance, the steel pipe pile is inserted into the pile hole, clay in the steel pipe pile is removed, a grouting device is placed in the steel pipe pile, the grouting device forms a closed space in the steel pipe pile, cement slurry is pressed into the steel pipe pile through the grouting device, the cement slurry is pressed into a space between the steel pipe pile and the rock layer through the slurry outlet holes on the steel pipe pile under high pressure, the steel pipe pile is firmly combined with the rock layer, the steel pipe pile can be kept stable under the action of water flow impact, water outside the cofferdam can be prevented from penetrating into the cofferdam from the space between the steel pipe pile and the rock layer, and therefore the water stop effect of the cofferdam is improved.

The utility model relates to the technical field of building construction, and discloses an anchor cable stop-grouting plug which is installed on a free section of a steel strand, the steel strand is arranged in an orifice in a penetrating mode, the anchor cable stop-grouting plug comprises a first expansion ring, a second expansion ring and an iron wire binding band, and the first expansion ring is arranged outside the second expansion ring in a sleeved mode. The steel strand is arranged between the first expansion ring and the second expansion ring, the inner wall of the first expansion ring is attached to the side wall of the steel strand, the outer wall of the first expansion ring is attached to the inner wall of the hole opening, the outer wall of the second expansion ring is attached to the side wall of the steel strand, and the inner wall of the steel strand is attached to the inner wall of the hole opening. A grouting pipe is arranged in the second expansion ring in a penetrating mode, and the iron wire binding belts are arranged at the two ends of the first expansion ring and the two ends of the second expansion ring and used for being fixed to the steel strands. The grouting device has the advantages that grouting pressure is increased, the sealing effect of the orifice is improved, and grout leakage is avoided.

The present invention provides a tunnel leakage repair device, which belongs to the technical field of tunnel maintenance. It includes a slurry storage tank, a grouting pump, a slurry pumping pipe, a Tesla valve pipe, a slurry inlet pipe, a slurry return pipe, an expansion and contraction joint and a grouting needle. The slurry storage tank is used to store grouting material; the grouting pump is connected to the slurry storage tank to extract the grouting material; one end of the slurry pumping pipe is connected to the grouting pump; the two ends of the Tesla valve pipe are respectively A port and B port, and the middle is provided with a C port, and the C port is connected to the other end of the slurry pumping pipe; one end of the slurry inlet pipe is connected to the B port of the Tesla valve pipe; one end of the slurry return pipe is connected to the A port of the Tesla valve pipe, and the other end is connected to the slurry storage tank; the expansion and contraction joint is arranged on the slurry return pipe, and expands when the pressure inside the slurry return pipe is higher than the first preset pressure, and contracts when it is lower than the second preset pressure; the grouting needle is connected to the other end of the slurry inlet pipe. The present invention is relatively easy to control the grouting pressure, can save manpower, and reduce safety hazards.

The present application relates to the technical field of goaf treatment, and particularly relates to a coal mine goaf treatment system and method. The technical scheme comprises a roadway mold and a U-shaped steel plate for supporting the inner wall of the roadway, the roadway mold is provided with a connecting device for the U-shaped steel plate, one side of the roadway mold is provided in an open manner, and an arc-shaped discharging groove is formed in the top of the roadway mold. The present application can uniformly distribute the slurry, increase the grouting pressure by extruding the slurry, increase the slurry diffusion range, improve the grouting reinforcement effect, effectively eliminate the bubbles in the grouting slurry by extruding the slurry, improve the compactness of the grouting, realize the automatic pouring of the concrete roadway and the support of the concrete roadway, integrate the concrete roadway pouring, grouting reinforcement and support, greatly improve the efficiency of the concrete roadway pouring and the support efficiency, improve the goaf treatment efficiency, and do not need manual operation and support erection for the roadway, and the degree of automation is high.

The present invention discloses a tunnel construction method and system combining deep hole sleeve valve tube grouting with horizontal rotary jet grouting, the system comprising: a deep hole sleeve valve tube grouting subsystem, which is arranged at the top surface formed by the ground surface above the arch of the tunnel section to be excavated, and comprises a first drilling device, a sleeve valve tube installation device and a first grouting device; a horizontal rotary jet grouting subsystem, which is arranged at the front end surface formed by the plane where the starting end of the tunnel section to be excavated is located, and comprises a second drilling device, a pipe roof installation device and a second grouting device; and a master control system, the master control system is remotely connected to the deep hole sleeve valve tube grouting subsystem and the horizontal rotary jet grouting subsystem through a communication network to control the first drilling device, the sleeve valve tube installation device, the first grouting device, the second drilling device, the pipe roof installation device and the second grouting device to complete their respective predetermined tasks within a predetermined time.

The invention relates to the technical field of grouting machines, and discloses a three-way orifice mixer efficient double-liquid grouting machine which comprises a fixed base, a first liquid storage tank and a second liquid storage tank are fixed to the fixed base, a first grouting pump is connected to the first liquid storage tank, a first liquid outlet pipe is connected to the first grouting pump, and a second liquid outlet pipe is connected to the second liquid storage tank. The first liquid storage tank is connected with a first grouting pump, the second liquid storage tank is connected with a second grouting pump, the second grouting pump is connected with a second liquid outlet pipe, a three-way orifice mixer is arranged between the first liquid outlet pipe and the second liquid outlet pipe in a communicating mode, the three-way orifice mixer is used for mixing and discharging two kinds of liquid, and a valve is installed on the three-way orifice mixer. The other end of the three-way orifice mixer is communicated with a grout outlet pipe; a grouting head is arranged at the end part of the grout outlet pipe; according to the technical scheme, before grouting, the horizontal position and height of the grouting head can be adjusted, so that the grouting head can be conveniently inserted into a grouting opening, and time and labor are saved.

The utility model discloses a double-layer small guide pipe advance support structure applied to an extremely high crustal stress tunnel. The double-layer small guide pipe advance support structure comprises a sprayed concrete layer and a support steel frame arranged in the sprayed concrete layer. The supporting steel frame is arranged in the axial direction of a tunnel in an equiaxial mode, a plurality of first grouting small guide pipes are arranged on the supporting steel frame in an equiaxial mode, second grouting small guide pipes are arranged between the adjacent first grouting small guide pipes, and the first grouting small guide pipes and the second grouting small guide pipes are different in elevation angle. The original single-layer support is changed into the existing double-layer support, and the first grouting small guide pipe and the second grouting small guide pipe are alternately supported, so that the support can be better carried out, the excavation working surface is better stabilized, and the deformation of the arch part after excavation is reduced.