68results about How to "Reduce the amount of grout" 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 discloses a microorganism grouting method capable of improving an early-stage calcium carbonate deposit volume, which comprises the following steps: (1) a nutritive salt solution is added into a microorganism bacterium liquid to obtain a mixed liquid of bacterium liquid and nutritive salt, and standing is carried out for 0.5-1h; and (2) during grouting, the mixed liquid of bacterium liquid and nutritive salt is blended with a calcium salt solution according to a predetermined proportion. Due to the adoption of a microorganism grouting material, not only is the total output of calcium carbonate sediment effectively improved, but also the early-stage output of the sediment is can be effectively improved, so that important significance is provided for blocking concrete cracks by utilizing a grouting method. Only a lot of calcium carbonate sediment is generated in relatively short time, the concrete cracks can be blocked in relatively short time, and thus grouting amount and times can be reduced.

The invention relates to a precast concrete member connected by a straight thread and a pier head lock anchor grouting sleeve, and a method for assembling the precast concrete member, belonging to the technical field of constructional engineering assembly concrete structures. The method of connecting by the straight thread and the pier head lock anchor grouting sleeve is adopted; one end of a reinforcing steel bar is processed into the straight thread (6), and the other end of the reinforcing steel bar is processed into a pier head (5); the inner wall of the end with smaller diameter of a connecting sleeve is processed into a thread (9) which is connected with the reinforcing steel by the straight thread (6) and is used for transmitting force; the inner wall of the end with larger diameter of the connecting sleeve is processed into a thread (16) which is connected with a matched plug ring (10) by an external thread (17); after grouting is carried out through a grouting hole, the original way that the tensile force of the reinforcing steel bar of a prefabricated part connected by grouting is transmitted mainly by bonding is changed by the reinforcing steel bar through lock anchor extrusion and bonding force transmission among the pier head of the reinforcing steel bar, the plug ring, grouting material and the sleeve. The safety and economical efficiency of the connection of the novel precast concrete member are improved.

The invention relates to a self-tightening half grouting sleeve connecting piece mainly applied to connecting of vertical reinforcing steel bars, including connecting of shear walls, frame columns and hanging board lamps. The self-tightening half grouting sleeve connecting piece is composed of a grouting opening (1), a thick liquid discharging opening (2), poking pieces (3), threads (4), a sleeve (5) and reinforcing steel bars (6). The diameter of the sleeve (5) is larger than the diameter of each reinforcing steel bar (6). The threads (4) are arranged on the inner wall of the sleeve (5). The grouting opening (1) is formed in the lower portion of the sleeve (5), the thick liquid discharging opening (2) is formed in the upper portion of the sleeve (5), and the poking pieces (3) are arranged in the position, between the grouting opening (1) and the thick liquid discharging opening (2), of the inner wall of the sleeve (5). The self-tightening half grouting sleeve connecting piece has the effects and advantages that the self gravity of the structure is utilized to conduct structure connecting, so that the structure is firmer; the diameter is increased slightly, so that the error-tolerant rate is increased; and meanwhile, connecting force is increased due to existing of the poking pieces, so that the length of the connecting piece can be reduced properly.

The invention discloses an anchor stock structure with an expanded head. The anchor stock structure is characterized in that an end socket of an anchor stock is provided with a shrinkage-strutting device which consists of an umbrella surface, umbrella ribs, a lower brace rod, an upper brace rod, a slide block and a sleeve pipe and is of an umbrella structure; the lower brace rod is connected withthe umbrella ribs and the slide block in a hinging manner; the upper brace rod is formed by hinging two rod elements, and further, is connected with the umbrella ribs and the sleeve pipe in the hinging manner; when the anchor stock is placed, the shrunk umbrella surface and the umbrella ribs are pushed to the bottom of an anchor hole together with the anchor stock; the slide block is pushed to a limiting retainer ring to be fixed; after the umbrella surface is strutted in a cambered surface shape, grout is injected to fill a compact hole to form an anchor stock pile of an expanded head structure. Compared with the prior art, the anchor stock structure has a small grout injection amount and high bearing capacity, is used for effectively solving a problem that anchoring force is insufficient, has a simple structure, is conveniently constructed, and is particularly applicable to anchor stock pile foundation projects of easy-to-collapse soil layers, including a pebble, muddy soil and the like, of a soft soil stratum.

The invention belongs to the field of tunnel construction, and particularly relates to a construction method for a grouting reinforced region applied to a water-rich sand layer shield tunnel. According to the technical scheme, the construction method comprises the following steps that 1, parameters of the grouting reinforced region and a grouting control mode are determined; 2, a grouting pump islaid to open reserved grouting holes on a segment; 3, grout is transported to a grout storing tank at the tail portion of a shield; 4, the grout is grouted synchronously through the reserved groutingholes on the segment to form the grouting reinforced region; and 5, the effect of the grouting reinforced region is monitored. According to the construction method for the grouting reinforced region applied to the water-rich sand layer shield tunnel, the grouting reinforced region formed for a sand layer can play a good role in strengthening and stopping water, the price of the grout is low, the amount of grouting is low, no secondary grouting is needed, and the construction process is easy to operate.

The invention relates to a grouting reinforcement construction process capable of realizing a draining and plugging combined effect for underground water in a vertical shaft. The grouting reinforcement construction process includes steps of (1), temporarily sealing the bottom of the vertical shaft, arranging grouting pipes on inner and outer sides of the vertical shaft, arranging drain pipes matched with the grouting pipes on the vertical shaft and locally pumping the water by a vacuum pump; (2), diluting sodium silicate of raw grout 39Be' by water to obtain grout 28Be', mixing TGRM grouting materials with cement according to a proportion of 1:3 to obtain second grout, mixing the grout 28Be' with the second grout according to a proportion of 1:1 to obtain liquid A, diluting sodium silicate of raw grout 39Be' by water to obtain grout 30Be', diluting strong phosphoric acid by water according to a proportion of 1:6 to obtain diluted phosphoric acid, and mixing the grout 30Be' with the diluted phosphoric acid according to a proportion of 1:1 to obtain liquid B; (3), alternately filling the liquid A and the liquid B into reinforcement soil layers of the vertical shaft via the grouting pipes and completing grouting for the periphery of the vertical shaft; and (4), feeding small pipes within a 1.5m range of the periphery of the vertical shaft by the aid of high-pressure blast, and alternately filling the liquid A and the liquid B into the periphery of the vertical shaft via the small pipes. The grouting reinforcement construction process has the advantages that 'draining' and 'plugging' are combined and work along both lines in the grouting construction process for the vertical shaft, so that water layers are prevented from diffusing and permeating towards feeble grouted positions, the vertical shaft construction difficulty is lowered, and the construction safety degree is increased.

The invention discloses a prefabricated concrete member, an assembled concrete member and a fabricating method through straight thread and nut locking anchor grouting sleeve connection and belongs to the technical field of assembled concrete structures of constructional engineering. A method of straight thread and nut locking anchor grouting sleeve connection is applied, one end of a reinforcing steel bar is machined to form a straight thread (6), a nut (5) is connected with the other end of the reinforcing steel bar, the inner wall of a small-diameter end of a connecting sleeve is machined to form a screw thread (9) so as to be connected with the reinforcing steel bar through the straight thread (6) to transmit force, the inner wall of a large-diameter end of the connecting sleeve is machined to form a screw thread (16) so as to be connected with a matched blocking ring (10) through an external thread (17), after grouting through a grouting hole (8), the pulling force of the reinforcing steel bar is transmitted through locking anchor extruding and cementation among the reinforcing steel bar nut, the blocking ring, a grouting material and the sleeve, and traditional methods that pulling forces of reinforcing steel bars of prefabricated members through grouting connection are mainly transmitted through cementation are changed. According to the prefabricated concrete member, the assembled concrete member and the fabricating method through straight thread and nut locking anchor grouting sleeve connection, the connection of the novel prefabricated concrete member is improved in terms of safety and economical efficiency.

The invention discloses a middle separation wall top original lining cavity backfilling construction method when a single-hole tunnel is changed into multiple arches. The method sequentially comprises the following steps that a, a middle separation wall is cast; b, an anterior hole is constructed; c, hole slag dug from the anterior hole is used for filling back a cavity arranged at one side of a posterior hole to the digging outline part of the posterior hole; d, a steel bar net is paved on the top of the backfilled hole slag, and then, concrete is sprayed on the surface of the steel bar net; e, an end template is arranged along a tunnel longitudinal frame, in addition, the end template, the surrounding rock and the original lining are fixedly built through lining by using anchor bolts; f, a side template is erected at the digging outline part of the anterior hole; g, concrete is filled and is compactly vibrated and smashed; h, the posterior hole is constructed; i, the original lining of the existing tunnel in the anterior hole and the posterior hole is dismounted. The construction method has the advantages that the original tunnel top cavity backfilling problem is effectively solved, so the pressure of the surrounding rock is uniformly transmitted onto a support protection structure, the stress uniformity and the structure completeness of the lining can be ensured, and the loading capability and the durability are improved.

The invention relates to the technical field of karst cave filling, provides a method for filling an underground cavity of a bedrock stratum through filler grouting, and particularly relates to a filling method of a deep-covering type (burial depth is larger than 30.0 meters) large-space karst cave and a roadway. The method comprises the steps of determining a drilling position, drilling a covering soil layer, arranging a conveying casing pipe, drilling a bedrock section, filling by a hydraulic filling method and grouting. According to the method, the underground cavity is filled with the gravel material through the hydraulic filling method, then grouting is conducted, the filled gravel material is solidified, and the integrity of the filling material is improved; and the filled gravel materials can occupy the space in the underground cavity, the grouting amount is greatly reduced, the treatment cost is reduced, a connecting channel between the cavity and the outside of the cavity canbe blocked or reduced, the filling treatment effect of the underground cavity is improved, and the filling treatment problem of the deep covering type large-space karst cave and the roadway is solved.The invention further provides a hydraulic filling device, the hydraulic filling device is used for filling the underground cavity with gravel materials, the filling speed is high, and the filling effect is good.

The invention relates to a reinforcing and lifting method for a strip-shaped or box-shaped foundation building. The reinforcing and lifting method comprises the following steps that the lifting side of the building is determined according to the elevations of measuring points; a plurality of reinforcing grouting holes inclining downwards are formed in the side surface of a strip-shaped foundationor a box-shaped foundation partition wall at intervals, and a reinforcing body is formed below the strip-shaped foundation or the partition wall by adopting pressure grouting in the reinforcing grouting holes; lifting holes inclining downwards are formed in the two ends close to the lifting side of the building; and the lifting holes go deep into the bottom of the reinforcing body, pressure grouting is carried out in the lifting holes at the same time, the reinforcing body is used as a buffer strip, the lifting side of the building is lifted, the lifting speed is controlled, the elevations oftwo corners are finally lifted to the same elevations as the elevations of corners corresponding to the non-lifting side of the building at the same time, then a reinforcing pile foundation is formedbelow the reinforcing body, and the reinforcing pile foundation and the reinforcing body jointly support the strip-shaped foundation. The reinforcing and lifting method has the advantages of being good in overall stability, controllable in lifting speed and height, small in damage to the building and capable of preventing secondary sedimentation.

The invention discloses a construction method of an underground continuous wall with water-rich karst development geology and a grouting wall structure. By constructing a BIM 3D geological model for reflecting the underground karst condition, the direction, distribution and size of a karst cave can be directly displayed, and a grouting wall is arranged on the outer side of the underground continuous wall of the water-rich karst high-development area under the guidance of the BIM 3D geological model to prevent the slurry filled in the karst cave from losing; and the geological model is used toclassify the karst cave, different filling methods are adopted, the layout of grouting points is optimized according to the different filling methods, a basis is provided for the analysis of filling coefficient and the statistics of slurry volume of the karst cave, and the construction pre-control of filling treatment of the karst cave is better achieved.

The invention provides a precast concrete component and an assembly concrete component connected with a pier head locking anchor grouting straight sleeve and a production method thereof and belongs to the technical field of construction engineering assembly concrete structures. A method of sleeve connection based on extrusion and binding force transfer is adopted and a pier head (5) and a pier head (6) are machined at two ends of steel bars respectively; the sleeve inner diameter of one end of a connecting sleeve (7) is smaller than the outer diameter of the corresponding end of steel bar pier head (6); the inner diameter of the other end of the connecting sleeve is large and the other end of the connecting sleeve is provided with threads; a blocking ring (10) is connected with the connecting sleeve, wherein the inner diameter of the blocking ring (10) is smaller than the outer diameter of the corresponding end of steel bar pier head (5); the locking anchor extrusion and binding force transfer among the steel bar pier heads, the blocking ring, the sleeve and grouting materials is utilized through the steel bars due to the sleeve grouting and accordingly the mode that the steel bar tension of the previous grouting connection precast component is mainly transferred through bonding is changed. According to the production method, the safety and the economy of the connection of the novel precast concrete component are improved.

The invention discloses a coral micropowder-based waterproof grouting material suitable for an offshore island water-enriched stratum. The coral micropowder-based waterproof grouting material suitablefor the water-enriched stratum is prepared from, by mass, 30-60% of coral micropowder, 15-25% of common Portland cement, 13-30% of pulverized fuel ash, 2-6% of silicon micropowder, 2-5% of a water-resistance dispersing agent, 0.05-0.1% of a silane impregnant, 1-4% of a corrosion-prevention rust-resistance agent and the balance high-performance water-reducing agents. The coral micropowder-based waterproof grouting material has the advantages of being good in fluidity and water resistance and dispersibility, low in water absorption rate and bleeding rate and good in seepage resistance; the coral micropowder-based waterproof grouting material can resist corrosion and dispersion on the water-enriched stratum when used for grouting construction of the offshore island water-enriched stratum, and can be quickly coagulated, and construction operation is facilitated.

The invention belongs to the technical field of mining engineering and particularly relates to a grouting treatment method for strip mining goaf. The method comprises the steps of (1) drill hole position and arrangement planning, (2) instrument fixation, drilling, casing laying, and grouting pipe laying, (3) slurry raw material preparation, (4) slurry cooperation and mixture, (5) grouting operation, and (6) grouting pipe collection. The method has the advantages that the overburden strata balance structure of the strip mining is consolidated, the long-term stability of a ground surface is achieved, the stability of a building foundation is ensured, materials are saved, the environment is protected, and the method has good social and economic values and is easy to promote.

The invention discloses a pre-applied force anchoring system for a slope protection device and a construction method thereof. The pre-applied force anchoring system comprises a threaded rod (1), concrete bamboo joint blocks (2), connection discs (3), a spring (4) and a nut (5). The concrete bamboo joint blocks (2), the connection discs (3) and the threaded rod (1) form an integrated anchoring body (6), and the concrete bamboo joint blocks (2) and the connection discs (3) are arranged at intervals. The anchoring body (6) is placed into an anchor hole (7), and the gap between the anchoring body (6) and the anchor hole (7) is filled with concrete mortar. The nut (5) is screwed on the threaded rod (1) in a matched mode. The nut (5) tightly presses the slope protection structure and the concrete bamboo joint blocks (2) through the spring (4). The construction method is characterized in that all the concrete bamboo joint blocks (2), all the connection discs (3) and the threaded rod (1) form the integrated anchoring body (6), the anchoring body (6) is placed into the anchor hole (7), and the gap between the anchoring body (6) and the anchor hole (7) is filled with the concrete mortar. According to the pre-applied force anchoring system for the slope protection device and the construction method thereof, the construction speed can be increased, site construction is convenient and quick, the anti-drawing strength and the shearing strength are both ideal, and the constraint effect on soil bodies is good.

The invention discloses a prestressing anchor body assembly type frame hoop slope protection device and a construction method. The prestressing anchor body assembly type frame hoop slope protection device comprises a frame hoop used for restraining a slope surface and an anchor structure used for tightly pressing the frame hoop. An integrated anchor body (6) is formed by concrete bamboo joint blocks (2), connecting discs (3) and a screw (1), wherein the concrete bamboo joint blocks (2) and the connecting discs (3) are arranged and distributed alternately. An anchor hole (7) is formed in the slope surface of a soil body. The anchor body (6) is placed in the anchor hole (7), and the gap between the anchor body (6) and the anchor hole (7) is filled with concrete mortar. The construction method comprises the key steps that the integrated anchor body (6) is formed by all the concrete bamboo joint blocks (2), all the connecting discs (3) and the screw (1); and the anchor body (6) is placed in the anchor hole (7), and the concrete motor is poured into the gap between the anchor hole (7) and the anchor body (6). By the adoption of the structure and method, the construction speed can be increased, the construction period can be shortened, field construction is convenient and fast, the anti-drawing strength and the shearing strength are both ideal, the restraining effect on the soil body is good, the tightness degree can be adjusted along with the expansion and contraction of the soil body conveniently, and the slope protection area of the frame loop can be changed freely.

The invention provides an accurate tracing compensation grouting construction method. The method comprises the following steps of laying a plurality of displacement meters in a settlement region, wherein the multiple displacement meters are arranged in parallel in the depth direction; acquiring detection data of each displacement meter; and if the distance between any two adjacent displacement meters changes, performing grouting construction on a corresponding position. According to the accurate tracing compensation grouting construction method, the actual settlement condition is acquired through the displacement meters arranged in an array, and grouting is performed according to the actual settlement condition, and thus, the grouting condition corresponds to the actual settlement condition, so that the grouting volume is reduced to the maximum extent, and the grouting construction period is shortened.