16results about How to "Improve grouting efficiency" patented technology

The utility model provides a ground drilling, grouting and water plugging device suitable for a metal mine, and relates to the technical field of mine water disaster prevention and control, the ground drilling, grouting and water plugging device comprises a petroleum casing pipe, a grouting drill rod, a rubber umbrella cover, a first grouting device and a second grouting device, the grouting drill rod is arranged in the petroleum casing pipe; the rubber umbrella cover is arranged between the oil casing and the grouting drill rod, the grouting drill rod is sleeved with the rubber umbrella cover, and the arrangement height of the rubber umbrella cover is lower than the top end of the oil casing; the first grouting device is fixedly connected with the grouting drill rod through a pressure-resistant steel pipe; the second grouting device is fixedly arranged on the oil casing pipe, and the connecting position of the second grouting device and the oil casing pipe is lower than the bottom end of the rubber umbrella cover. External incoming water of a broken zone of a mining area can be blocked, the water inrush influence of excavation and construction is reduced, the grouting efficiency is improved, the slurry loss is reduced, and the service life of the mining area is prolonged. Therefore, excavation safety is guaranteed, and construction cost is reduced.

The application belongs to the technical field of tunnel and underground engineering disaster prevention and control, and particularly relates to a cement-polyurethane composite grouting material suitable for dense soft rock reinforcement and a preparation method thereof. The composite grouting material is mainly formed by mixing a penetration cross-linking liquid and a grout vein skeleton liquid. The penetration cross-linking liquid is formed by mixing a grouting material A component and a grouting material B component. A semi-prepolymer is obtained by pre-polymerization reaction of a polyisocyanate and a polyether polyol, and then a diluent and a catalyst are added to the semi-prepolymer to obtain the grouting material A component; a surfactant, a retarder and water are mixed to obtain the grouting material B component; and cement and water are uniformly mixed in a certain proportion to obtain the grout vein skeleton liquid. The cement-polyurethane composite grouting material and the preparation method thereof can achieve penetration-splitting composite reinforcement effect when grouting in a dense soft rock poor geological section with strong density and poor permeability, and the grout preparation process and grouting operation steps are more simple and efficient.

This invention relates to the field of construction, specifically to a method for constructing a pressure-bearing composite chamber anchor bolt, comprising the following steps: S1, locating drilling points in the soil layer; S2, drilling holes in the soil layer; S3, placing the anchor bolt into the drilled hole; S4, grouting the chamber of the anchor bolt to expand it, and grouting into the drilled hole; S5, after grouting, applying prestress to the anchor bolt; S6, completing the construction. This invention can calculate the optimal prestress locking value applied to the anchor bolt under different working conditions during anchor bolt construction, thereby maximizing the strength and durability of the anchor bolt.

This disclosure relates to the field of coal mining technology. One embodiment of this disclosure provides a coal mine goaf fireproof grouting conveying device, including a base plate. A mixing and stirring assembly is fixedly installed on the top of the base plate, and fixing blocks are fixedly installed on both sides of the bottom of the base plate. In the fixing process, a stable anchoring mechanism is formed through a multi-stage transmission structure from the second adjusting block to the fixing protrusion. The horizontality of the connecting sleeve can be precisely adjusted according to different geological conditions to ensure that the fixing protrusion is firmly drilled into the ground, providing reliable support for the base plate and the mixing and stirring assembly, and effectively resisting the pressure and vibration generated by the grouting operation. In terms of position adjustment, the fixing protrusion is first lifted off the ground, and then the second adjusting block is rotated in the opposite direction to restore the component to its original position. Flexible movement is achieved with the help of external force and the support of the moving assembly. The grouting position can be adjusted according to the actual situation of the goaf. Through the above technical solution, the technical problem of a coal mine goaf fireproof grouting conveying device in the prior art is solved.

The application provides a buried pipeline pipe joint misalignment repair method, and belongs to the technical field of pipeline repair, and comprises the following steps: step one, grouting and reinforcing the external soil body deviated to one side of the pipe joint; step two, pushing and repairing the pipe joint misalignment position in the pipe joint; step three, grouting and reinforcing the surrounding of the pipe joint misalignment position; step four, cutting and grinding the inner wall of the pipe joint misalignment position in the pipe joint; and step five, lining and repairing the pipe joint misalignment position in the pipe joint. The buried pipeline pipe joint misalignment repair method provided by the application can prevent the pipe joint misalignment from further developing seriously in the subsequent pushing and repairing process in step one, and can further restore the misalignment and prevent the misalignment from further developing seriously in step three. Through the non-excavation repair treatment, the repair of the third and fourth grade serious misalignment is realized, the pipeline flow section can be comprehensively restored, and the further development of the misalignment can be prevented.

The application discloses a kind of highway reconstruction and expansion new old road embankment joint surface pre-buried grouting reinforcement method, comprising: the position and line of the grouting pipe network to be laid are demarcated on the slope surface after cleaning according to design requirements;Grouting pipe network of grid net structure is laid along the original embankment slope, and grouting guide pipe and grouting valve are installed on the top of grouting pipe network;According to the compaction degree and the rolling thickness of design requirement, fill and compact construction to design elevation layer by layer;Grouting reinforcement;14 days after stopping grouting construction, the grouting reinforcement effect is detected, the grouting guide pipe on the top of embankment is cut off after meeting the design requirements;Finally, the new old embankment joint on the foundation includes original embankment, grid net structure filled with grouting body formed by PVC pipe and expansion embankment;So as to realize the efficient reinforcement of new old embankment joint part.The method can avoid the excavation of soil and rock mixed embankment reconstruction and expansion steps, effectively shorten the construction time and improve the grouting efficiency, and ensure the reinforcement quality.

This utility model discloses a grouting device for reinforcing soft soil foundations with geopolymers in the field of grouting equipment technology. It includes a fixing ring, a grouting pipe, a soil-breaking cone, and a feed inlet. A T-slot is disposed on the top of the fixing ring, a T-shaped mounting plate is fixedly connected to the side of the grouting pipe, a fixing plate is fixedly connected to the upper part of the grouting pipe, fixing bolts are provided on the fixing plate, a reinforcing plate is fixedly installed at the bottom of the fixing ring, a through hole is disposed on the grouting pipe, a grout outlet is disposed at the right end of the through hole, a moving plate is disposed inside the grout outlet, a grout outlet hole is disposed on the moving plate, and a positioning ring is fixedly installed on the right end of the inner wall of the grout outlet. The grouting pipe is directly inserted into the soft soil foundation for direct grouting without any equipment adjustment, enabling rapid grouting of the soft soil foundation and improving grouting efficiency.

The utility model relates to a shear wall horizontal joint tooth groove type dry connection structure which comprises a lower-layer shear wall piece and an upper-layer shear wall piece, joint tooth grooves are formed in the bottom of the lower-layer shear wall piece and the bottom of the upper-layer shear wall piece, and a plurality of joint tooth blocks are installed on the top of the lower-layer shear wall piece and the top of the upper-layer shear wall piece. The top of each joint tooth block is provided with a clamping groove, each clamping groove is clamped with a protrusion formed between every two adjacent joint tooth grooves, and a continuous grouting assembly is arranged in each joint tooth block. Through concave-convex clamping of the joint tooth grooves, the joint tooth blocks can be clamped with the two tooth grooves at the same time, the limiting effect is enhanced, and the risks of sliding and dislocation of the tooth blocks are effectively reduced; and meanwhile, by means of the characteristic that slurry fills the cavity and enters the first grouting cavity in the joint tooth block during grouting, the joint tooth block is further limited and fixed, sliding dislocation of the joint tooth block is avoided through double guarantee, and the structural stability and reliability are improved.

This invention discloses a digital twin-based optimization method and system for prestressed steel strand support in mines, belonging to the field of steel strand support technology. Addressing the problems of traditional support design relying on experience, poor dynamic adaptability, and difficulty in leveraging the advantages of new steel strands, this invention constructs a high-precision digital twin model of the mine roadway. With support safety, economy, and construction efficiency as comprehensive objectives, it optimizes parameters such as steel strand specifications, layout, and preload. The model is dynamically calibrated through real-time monitoring data, and an LSTM-random forest combined model is used to deduce the health evolution trend of the support system and provide graded early warnings. Standardized construction guidance documents are generated, forming a mechanism for design, construction, monitoring, and optimization. This invention can fully leverage the technical advantages of ultra-high elongation and hollow, low-relaxation steel strands, significantly improving the accuracy and safety of support design under complex geological conditions, and providing an integrated support solution for mines.

The invention provides a variable-parameter segmented ground pre-grouting system and method for a multi-layer aquifer, a three-dimensional grouting hole structure is adopted, and a graded grouting unit and a real-time monitoring unit work cooperatively: three-dimensional grouting holes are arranged at intervals of inner and outer double circles of long and short holes to form a closed water plugging barrier; the graded grouting unit is provided with high-pressure and low-pressure grouting pumps to meet the grouting requirements of deep and shallow holes; the real-time monitoring unit guarantees construction precision and data acquisition through an inclinometer and a pressure and flow sensor. The construction comprises the steps of early-stage investigation, test calibration, segmented downward grouting, variable parameter dynamic adjustment, quality detection and special part treatment, the grouting pressure, the slurry ratio and the segmented height are dynamically optimized based on the stratum characteristics, and the grouting blind area is eliminated in combination with a one-sequence cement-water glass double-liquid slurry and two-sequence chemical slurry synergistic process; precise plugging of multiple aquifers is achieved, curtain continuity and compactness are improved, construction risks are controllable, the construction period is shortened by 15%-20%, and slurry consumption is reduced by 18%.

The invention discloses a grouting device and method suitable for a water-rich soft and hard interactive fractured stratum, solves the problem that in the prior art, a grouting device is single in function, and has the beneficial effect that grouting slurry can be switched in time. Comprising a mixing pumping unit, a mixing stirrer is connected with a grouting pump body, and the grouting pump body is connected with a conveying pipe; the water-soluble auxiliary material batching and conveying unit, the water tank and the water-soluble auxiliary agent storage tank are respectively connected with the first booster pump, a control switch and a first flow transmitter are arranged between the water-soluble auxiliary agent storage tank and the first booster pump, and a second flow transmitter is arranged at a connecting pipeline of the first booster pump and the mixing stirrer; the permeation slurry conveying unit and the permeation slurry storage tank are connected with the mixing stirrer through a second booster pump, and a third flow transmitter is arranged between the second booster pump and the mixing stirrer; the particle type slurry conveying unit comprises a particle type slurry storage tank.

The utility model provides a tool for small section steel column inner concrete grouting relates to steel column grouting tool technical field, include: a plurality of telescopic parts, a plurality of telescopic parts are connected in succession sliding, to extend integral structure, every telescopic part includes the sleeve of upper and lower through -penetration, seal ring and a plurality of inner bracing structure, the inner bracing structure sets up in the sleeve, the seal ring is connected in one end of the sleeve, the sleeve of one telescopic part in arbitrary adjacent two telescopic parts and the seal ring inner diameter of another telescopic part fit sliding connection. The utility model has the advantages of: through the ingenious design of a plurality of telescopic parts and inner bracing structure, effectively reduce the impact difference of concrete, prevent concrete segregation, ensure grouting quality, the continuous sliding connection of telescopic part and the buffer effect of deflector make the tool can adapt to the narrow space of small section steel column, improve grouting efficiency, reduce the risk of blockage.

This invention belongs to the field of gas control technology and relates to an integrated anti-blocking device and method for gas drainage boreholes, including a coal borehole wall support structure, a rock borehole section sealing structure, and a connector that fixes the two together. The coal borehole wall support structure includes multiple connecting pipes and at least one screen pipe arranged between the connecting pipes. Multiple metal supports are fixedly connected to the outside of the screen pipe. One end of the metal support is fixed to the screen pipe, and the other end is connected to the screen pipe through a second elastic element. Under normal conditions, the metal support is close to the screen pipe. The non-fixed end of the metal support is provided with a spherical buckle that is locked into the buckle opening of the screen pipe. A spherical top pin that can move axially is provided inside the screen pipe at the position corresponding to the spherical buckle. The spherical top pin is connected to an unhooking lead extending to the outside of the borehole. Pulling the unhooking lead can cause the spherical top pin to push out of the spherical buckle, causing the metal support to expand outward under the action of the second elastic element. The rock borehole section sealing structure includes a sealing pipe and a rear end bag and a front end bag fitted on it.

This invention discloses an intelligent automated grouting method suitable for weak and fractured roof slabs in deeply buried highway tunnels, comprising the following steps: (1) During the excavation of the highway tunnel, a grouting main pipe system is deployed along the entire length of its sidewalls; (2) During the advancement of the tunnel face, hollow grouting anchor cables are installed in the weak and fractured roof slabs of the highway tunnel at a distance of 10-20m from the tunnel face, and the hollow grouting anchor cables are connected to the grouting main pipe for grouting; (3) During the advancement of the tunnel face, a monitoring and early warning instrument is quickly deployed in the weak and fractured roof slabs of the tunnel lagging behind the tunnel face; (4) When the grouting main pipe system receives an early warning signal, the weak and fractured roof slabs of the highway tunnel are automatically grouted. This invention can monitor the delamination amount of the weak and fractured roof slabs in real time, accurately grasp the grouting timing, ensure the grouting effect, significantly reduce the tedious and repetitive work of manual grouting, avoid incorrect judgment of the grouting timing, and improve the grouting efficiency of the weak and fractured roof slabs of highway tunnels.

The utility model discloses a polluted coal well sleeve valve pipe grouting device, which relates to the technical field of geotechnical engineering grouting, and comprises a pretreatment dewatering mechanism and a sleeve valve pipe inner cylinder arranged in the pretreatment dewatering mechanism, the pretreatment dewatering mechanism comprises a sleeve valve pipe outer cylinder, first drilling threads are fixedly installed on the outer side of the sleeve valve pipe outer cylinder, water conveying holes are formed in the sleeve valve pipe outer cylinder at equal intervals in the vertical direction, filter screens are fixed in the water conveying holes, and the filter screens are fixedly connected with the water conveying holes. When soil grouting is carried out, the water content of soil is firstly monitored, then grouting reinforcement is carried out on an area with the highest water content, water conveying of the soil is carried out through the water conveying holes in the sleeve valve pipe outer cylinder, pore water in the soil enters the sleeve valve pipe outer cylinder through the water conveying holes, and then grouting reinforcement is carried out. And pore water is discharged, so that the effect of reducing the soil moisture content is achieved.

The utility model discloses a microbial colloid anchor rod, and belongs to the technical field of geotechnical engineering anchoring support. The anchor rod comprises a hollow glass fiber anchor rod body, grouting holes are formed in the surface of the anchor rod body, and the outer surface of the anchor rod body is coated with an anti-corrosion reinforcing layer. A microorganism temperature control vibration assembly is embedded in the outer wall of the anchor rod body and comprises a vibration rod and an integrated temperature control module connected with the vibration rod. The tail end of the anchor rod body is sequentially sleeved with an elastic stop-grouting plug, an anti-corrosion gasket and a locking nut. The anchor rod further comprises a colloid pretreatment assembly, the colloid pretreatment assembly is composed of bacterium liquid packaging units and cementing liquid packaging units, the bacterium liquid packaging units and the cementing liquid packaging units are independently packaged through degradable polylactic acid films, and the bacterium liquid packaging units and the cementing liquid packaging units are alternately stacked in the axial direction of the anchor rod. The reinforced concrete is reasonable in structural design, has good bonding strength and corrosion resistance, and is suitable for green and efficient reinforcement of geotechnical engineering such as foundation pits and side slopes.