111results about How to "Improve grout quality" patented technology

The invention relates to the field of tunnel construction, in particular to a rapid construction method of a high-pressure water-rich fault zone of a tunnel, which solves a plurality of problems in the construction method of high-pressure water-rich fault zone tunnels under the guide of the traditional knowledge. A draining branch tunnel is additionally arranged between a main tunnel and a parallel heading, the water flow pressure of the hanging wall of a fault interface is reduced progressively, and a large amount of water is discharged from the main tunnel by adopting a guiding and non-clogging mode; when the water pressure of the main tunnel is reduced to 0.3-0.5MPa, an informationized tracking and accurate grouting method is used for grouting and reinforcing the main tunnel; and rapidly excavating and sealing technology is used for excavating the main tunnel and the parallel heading. The invention adopts the technology combining the water distribution and pressure reduction mode, the informationized tracking and accurate grouting method and the rapidly excavating and sealing technology for high-pressure water-rich shattered fault zones for the first time, breaks through the traditional concept that the water distribution and pressure reduction mode is opposite to the grouting and reinforcing construction method, solves the world-class problem of construction of the high-pressure water-rich fault zone of the tunnel, improves the construction progress and the construction efficiency, and ensures safe and rapid perforation of the tunnel.

The invention provides a blocking valve, a grouting sleeve and a prefabricated component connecting method. The steel bar connection grouting sleeve has a sealed space, and can be automatically sealed after grouting, and the grouting degree can be observed in a grouting process. Compared with an existing open sleeve, the grouting sleeve has the advantages that higher pressure can be born in the grouting process, the grouting sleeve can be automatically sealed after grouting, and the grout fullness of the sealed space can be observed in the grouting process, thereby monitoring the grouting quality of the grouting sleeve. The blocking valve, the grouting sleeve and the prefabricated component connecting method can be widely applied to a grouting sleeve connection process in the technical field of building construction.

The invention discloses a pressure-controllable layered grouting type sleeve valve tube and a grouting method. Controllable pressure and accurate layered grouting are realized, and grouting quality iseffectively improved. The pressure-controllable layered grouting type sleeve valve tube comprises an outer tube, an inner tube, a rotating handle and a pressure measuring device, wherein the lower end of the outer tube is closed, and the upper-part inner wall is provided with an inner threaded segment; multiple layers of outer tube grout outlet holes are longitudinally and equidistantly formed inthe lower-part tube wall in a spaced mode, and each layer of the outer tube grout outlet holes is composed of at least two grout outlet holes uniformly distributed in the circular direction; and rubber one-way valves for covering all the outer tube grout outlet holes are arranged on the outer wall of the outer tube; the lower end of the inner tube is closed, and multiple layers of inner tube grouting holes are longitudinally and equidistantly formed in the lower-part tube wall of the inner tube in a spaced mode; the center distance of adjacent two layers of the inner tube grouting holes is equal to the center distance of adjacent two layers of the outer tube grout outlet holes, and each layer of outer tube grouting holes is composed of at least two grouting holes with corresponding to thegrout outlet holes in number and position; and a rotating handle communicating with the inner tube longitudinally is fixedly installed at the upper end of the inner tube and used for inserting the inner tube main body into the outer tube, and an outer threaded segment on the upper part of the rotation is connected with the inner threaded segment of the outer tube in a threaded mode. The pressuremeasuring device comprises a pressure sensor fixedly installed on the outer wall of the inner tube at the positions of the grouting holes.

The invention relates to the field of rebar sleeve grouting and specifically discloses a variable pressure grouting pump and a grouting method. The grouting pump comprises a feeding part, a grouting part and an output part; the grouting part is connected with a discharging port of the feeding part; the output part is connected with a slurry outlet of the grouting part; the output part comprises acontrol valve and a conveying pipe; the control valve comprises a first valve inlet, a second valve inlet and a valve outlet; one end of the conveying pipe is connected with the valve outlet; the slurry outlet comprises a variable pressure slurry outlet and a normal pressure slurry outlet; the variable pressure slurry outlet is connected with the first valve inlet through a variable pressure device; the normal pressure slurry outlet is connected with the second valve inlet. According to the invention, the variable pressure slurry outlet is added and the variable pressure device is arranged between the variable pressure slurry outlet and the control valve, so that the technical problem of influences on slurry discharging pressure and flow of the grouting pump caused by untight closing of aslurry discharging valve block in the prior art can be solved, and the saturability, evenness and airtightness of slurry in the sleeve can be promoted.

The invention discloses a grouting device for a prefabricated component. The grouting device comprises a precast concrete wallboard, a precast concrete beam, a grouting sleeve pre-buried at the bottomof the precast concrete wallboard, and a slurry circulation conveyor mechanism connected with the grouting sleeve. A sleeve outlet is arranged at the top of the grouting sleeve, and a sleeve inlet isarranged at the bottom of the grouting sleeve. The slurry circulation conveyor mechanism comprises a mixing device and a booster pump connected with the mixing device, a slurry inlet and a slurry outlet are formed in the mixing device, the slurry outlet is connected with a conveyor channel, the conveyor channel communicates with the sleeve inlet, the slurry inlet is connected with a backflow channel, and the backflow channel communicates with the sleeve outlet. The slurry circulation conveyor mechanism is arranged to realize the purpose of circulation grouting, the problems such as insufficient grouting inside the sleeve, incomplete bubble elimination, incomplete grouting at the joint or leakage of grouting at a seal chamber are effectively solved, and the connection quality between precast concrete components is improved.

The invention discloses an advanced grouting construction method for an underground excavated tunnel. The method comprises the steps of step I, dividing the section of the tunnel into a first upper pilot tunnel, a second upper pilot tunnel, a first lower pilot tunnel and a second lower pilot tunnel; step II, after pipe shed advance support, performing advanced grouting on the first upper pilot tunnel in the tunnel excavation direction, and excavating and supporting the first upper pilot tunnel; step III, performing grouting reinforcement on the to-be-excavated areas of the first lower pilot tunnel and the second upper pilot tunnel from the first upper pilot tunnel through the excavated and supported space of the first upper pilot tunnel; step IV, excavating and supporting the first lower pilot tunnel, performing grouting reinforcement on the to-be-excavated area of the second lower pilot tunnel from the first lower pilot tunnel through the excavated and supported space of the first lower pilot tunnel; step V, excavating and supporting the second upper pilot tunnel, and then excavating and supporting the second lower pilot tunnel; and step VI, repeating the step II, the step III, the step IV and the step V, and completing tunnel construction. The construction method can shorten the construction period, improve the grouting effect and reduce the construction cost.

The invention provides an ultra-large area grouting construction method for a steel-concrete combined section of a cable-stayed bridge. The ultra-large area grouting construction method comprises thesteps of chiseling a notch, arranging a partition wall, arranging cushion blocks, installing a first section of steel tower and grouting a bearing plate. Notch chiseling comprises the step of pouringa tower base to the top surface of a grouting layer in the tower base construction process; except for tower base concrete with the width of 30 cm reserved on the periphery of the top face of the tower base, overpoured concrete with the width of 5 cm is chiseled away in a roughening mode, area division is conducted by arranging a partition wall, cushion blocks are arranged to support the first section of the steel tower, and grouting is achieved by directly conducting grouting from the hole position of a pressure bearing plate. Due to the fact that concrete around the tower base is used as a fence, a formwork does not need to be erected, pollution to the inclined face of the tower base during grouting is avoided, and the grouting quality is improved. As the partition wall adopts a groutingmaterial and a rubber strip, the leakproofness is enhanced; by means of the construction method, high-quality and high-efficiency construction of ultra-large-area grouting of the steel-concrete combined section of the cable-stayed bridge is guaranteed.

The invention discloses a pouring construction device for a vault of a secondary lining of a tunnel and a corresponding construction method. The device comprises a flexible pipeline, a pipeline conveying mechanism and a pipeline retracting and releasing mechanism, wherein the pipeline conveying mechanism comprises a first guide wheel and a second guide wheel, the flexible pipeline is driven by thefirst guide wheel and the second guide wheel to move, and the pipeline retracting and releasing mechanism comprises a coiling block, can be coiled by the coiling block and can penetrate from the sidesurface of the coiling block with a steel pipeline connected to the flexible pipeline. By carrying out vault pouring by employing the device, concrete is poured to the vault from top to bottom, so that a jet grouting mode from bottom to top is avoided, generation of cavities, cracks and the like is reduced advantageously, and the pouring construction quality is improved.

The invention discloses a shear-yielding and pressure-yielding cable-anchored pile structure which comprises a pressure-yielding slide-resistant pile structure and a pile block shear-yielding anchoring structure. The pressure-yielding slide-resistant pile structure comprises an slide-resistant pile, wherein a pressure-yielding layer is arranged on a side face where the slide-resistant pile is in contact with a slope; the pile block shear-yielding anchoring structure comprises a free section drill hole, and an anchoring section drill hole is formed in the bottom face of the inner side of the free section drill hole; the free section drill hole extends inward to the inner side of a potential slip face of the slope, an outer orifice of the free section drill hole is located in a contact face of the slope and the pressure-yielding layer, through holes communicating with the free section drill hole are formed in the slide-resistant pile and the pressure-yielding layer, the inner side end of an anchor bar extends inward to be located in the anchoring section drill hole, and the outer side end of the anchor bar extends outward out of the slide-resistant pile; mortar fills the anchoring section drill hole, a low compression modulus grouting material fills the free section drill hole, and an anchorage device for tensioning and fixing the anchor bar is arranged on the outer orifice of each of the through holes. The invention also provides a construction method of the shear-yielding and pressure-yielding cable-anchored pile structure.

The invention discloses a grouting unit flowmeter calibration device and method. The method includes the following steps that a flowmeter calibration mark and a flowmeter full-scale value are initialized; when the storage interval of a recorder is reached, the grouting amount during the storage interval is recorded; whether a pulp preparation system runs during the storage interval is judged, if the pulp preparation system runs, the initial pulp amount of the pulp preparation system is initialized, and returning to the step 2 is executed; whether the pulp injection rate of the system is a small injection rate or not is judged, if the pulp injection rate of the system is not the small injection rate, returning to the step 2 is executed, if the pulp injection rate of the system is the smallinjection rate, the flowmeter full-scale value is calibrated and the flowmeter calibration mark is set. According to the device and the method, machines can be used for automatically measuring the grouting amount of a grouting barrel, the flowmeter is automatically calibrated, the automation level of a site can be improved, supervision interference and work intensity are reduced, key quality points of grouting are controlled, the grouting quality is improved, the unnecessary grouting time is reduced and the grouting progress is improved.

The invention belongs to the technical field of cement base material underwater foundation construction, and particularly relates to a construction method of underwater concrete grouting. The construction method includes the following steps of cofferdams, pipes burying, enrockment, mechanical drainage and grouting. According to the technical scheme, compared with the prior art, the construction method has the following advantages that lateral supports do not need to be pre-arranged in the cofferdams; the amount of the mechanical drainage is reduced, and the cost is lowered; and the qualities of stone piling and grouting are high, and the cost is low.

The invention provides a grouting device for preventing spontaneous combustion of coal, the grouting device comprises a crushing and feeding mechanism, the crushing and feeding mechanism is used for crushing and scattering grouting raw materials, and the crushing and feeding mechanism is used for automatic feeding, so that the functions of crushing, scattering and automatic feeding of the grouting raw materials are realized; the crushing roller and the auger motor are matched with the driving gear and the driven gear, so that the functions of crushing and automatic feeding can be completed only through one motor, the cost is saved, and meanwhile the phenomenon that a grouting pipe is blocked due to the fact that grouting raw material particles are large is avoided; the interior of the stirring tank is subjected to air exhaust treatment in the stirring and slurrying period, the air content in grouting materials is effectively reduced, the phenomenon that after the grouting materials are cooled, holes are formed in the grouting materials is effectively avoided, the grouting quality is further improved, the mixing mechanism is matched with the multiple stirring mechanisms, uninterrupted slurrying and grouting operation is achieved, and the grouting efficiency is improved. And the grouting continuity is effectively improved, and the grouting quality is improved.

The invention relates to a curtain grouting water plugging device in confined water stratum and a working method of the curtain grouting water plugging device. The curtain grouting water plugging device comprises a water guiding pipe, a water distribution pipe, a water pressure balancing pipe, a diagonal brace and a grouting pipe. Water at a water leakage point is drained into the water pressure balancing pipe through the water guiding pipe, the water distribution pipe and the water pressure balancing pipe which communicate with each other, so that the water head pressure in the pipes is balanced with the water pressure in a water leakage hole. Then the water in the guiding pipe is blocked by grouting at the bottom of the hole and grouting at a hole opening. The curtain grouting water plugging device is simple in principle and convenient to operate, static water grouting can be realized in curtain water gushing holes, and the plugging quality of a leaking curtain is greatly improved.

The invention discloses an intelligent mud jacking system for a magnetic levitation track beam. The system comprises corrugated pipes arranged in all reserved pore passages in the track beam, wherein a mud inlet pipe and a mud outlet pipe are connected with one ports of the two different corrugated pipes, respectively; other ports of all corrugated pipes are communicated with each other through a plurality of connecting pipes to form a mud injection passage; the mud inlet pipe and the mud outlet pipe are connected with a mud jacking device, respectively; and the mud jacking device is used for jacking cement mud for the track beam into the mud injection passage from the mud inlet pipe and enabling the cement mud to flow out from the mud outlet pipe and enter the mud jacking device; therefore, a mud jacking circulation is formed. According to the intelligent mud jacking system for the magnetic levitation track beam, disclosed by the invention, sealed circulated mud jacking for each corrugated pipe of the track beam can be achieved; a defect of non-uniform strength of the track beam caused by non-uniform mud filling in the corrugated pipes of the track beam can be effectively prevented; the mud can be filled into the track beam at one time; the time and cost are saved; and the mud injection efficiency is increased.