43results about How to "Reduce grouting time" patented technology

The invention discloses a pile foundation grouting pressure testing device and method based on optical fiber sensing. The device comprises a reinforcement cage, a pile end inverted-T-shaped grouting device and a high-pressure elastic capsule with an optical fiber type pressure sensor, wherein the high-pressure elastic capsule is externally connected with an oil pump through a high-pressure oil pipe to be filled with high-pressure oil, the elastic capsule is completely expanded to be in effective contact with grout in the grouting process, the optical fiber type pressure sensor and a data acquisition instrument in the high-pressure elastic capsule are used for monitoring and storing the dynamic change of the oil pressure in the high-pressure elastic capsule in real time, and the dynamic change is transmitted to a background processor. The problems that the pile foundation grouting pressure is accurately determined and is interfered by human factors can be effectively solved, grouting pressure parameters can be adjusted through the obtained accurate grouting pressure, and the grouting reliability is guaranteed; and secondly, unified standard accumulation test data can be formed for accurate calculation of the grouting pressure of a pile end grout outlet, and a reference basis is provided for analyzing the upward-returning height of the pile end pressure grout.

The invention provides a pile bottom grouting method. Grouting materials are utilized as pile bottom filling replacement materials to replace cement slurries, cement mortars or fine aggregate concretes. Compared with the cement slurries and the cement mortars, the grouting materials are large in vertical expansion ratio and high in strength; compared with the fine aggregate concretes, the grouting materials have pourable construction feasibility inside narrow and small holes; accordingly the grouting materials are capable of saving the grouting amount and grouting time when grouting operation is performed; and the pile bottom grouting efficiency is greatly improved.

A method for microbial low-temperature grouting, the steps comprising: a. driving the grouting flower tube 2 of the low-temperature grouting equipment into the foundation 3; b. using centrifugation to remove the existing biological enzymes and preparing a 4°C low-temperature bacterial solution (Bacterial solution concentration OD600=1.2 or so), mixed with calcium chloride and urea at 4°C (calcium chloride concentration is 0.10mol / L~0.50mol / L, urea concentration is 0.10mol / L~0.50mol / L) Mix to make microbial cementing fluid, and keep the temperature at 4°C; c. Inject microbial cementing fluid 4 into the soil to be solidified through the low-temperature grouting equipment composed of 1, 2, 5, 6, and 7; d. After grouting After the soil temperature rises to 15°C, let it stand for 1 hour; e. Repeat steps c and d until the microbial cementing fluid cannot be injected into the soil or the soil strength meets the requirements, then stop grouting.

The invention discloses a high-pressure integrated closestool forming machine. The high-pressure integrated closestool forming machine comprises a fixed upper mold, a movable upper mold, a movable upper mold push device, a movable lower mold, a movable lower mold push device and a machine base, wherein the fixed upper mold is fixed to the machine base, the fixed upper mold and the movable upper mold are arranged side by side, the movable upper mold push device is connected with the movable upper mold and can push the movable upper mold to move horizontally, the movable lower mold can be matched with the fixed upper mold and the movable upper mold, and the movable lower mold push device is connected with the movable lower mold and can push the movable lower mold to move horizontally and vertically. A cavity in a whole closestool shape can be defined by the fixed upper mold, the movable upper mold and the movable lower mold, slurry is injected into the cavity, the integral closestool shape can be formed after extrusion is carried out, and a whole closestool blank can be formed at a time. The production process is greatly simplified, and the production efficiency is improved.

The invention discloses a vacuum-assisted post-grouting device and method for a cast-in-situ bored pile. The vacuum-assisted post-grouting device comprises grouting pumps, outer grouting pipes, innergrouting pipes, a grouting device, a vacuum pump, a vacuum bin, an outer vacuum pipe, an inner vacuum pipe, and a negative pressure device. Grouting holes are distributed in the grouting device and located in a gravel layer; negative pressure holes are distributed in the negative pressure device and located in a sand cushion layer; sand prevention cloth covers the negative pressure holes in the negative pressure device; the sand cushion layer is laid at the pile bottom, and the gravel layer is laid on the sand cushion layer; the lower ends of the inner grouting pipes are communicates with thegrouting device; the upper ends of the inner grouting pipes extend out of a pile hole and are detachably connected with the outer grouting pipes; the lower end of the inner vacuum pipe is communicatedwith the negative pressure device, and the upper end of the inner vacuum pipe extends out of the pile hole and then is detachably connected with the outer vacuum pipe; the upper ends of the inner grouting pipes and the upper ends of the inner vacuum pipes can be sealed through pipe caps; the inner grouting pipes, the grouting device, and the inner vacuum pipe are connected to a reinforcement cage, and the bottom end of the reinforcement cage is located inside the gravel layer; valves are arranged on the outer grouting pipes and the outer vacuum pipe; and a valve and a vacuum degree detectionpart are arranged between the vacuum pump and the vacuum bin. According to the vacuum-assisted post-grouting device and method for the cast-in-situ bored pile, the post-grouting quality is high.

The invention provides a deep hole grouting technology and method at an advanced abutment pressure region for a comprehensive mining work surface of a coal mine. According to the method disclosed by the invention, early strength deep hole grouting materials are matched with a high-pressure mass-flow grouting pump, and an advanced hole forming technology, a pipe inserting technology, a hole sealing technology and a grouting technology for the advanced abutment pressure region are adopted, so that the problem that high-yield high-efficiency coal mining work surfaces with large mining height, top coal caving and the like can are often subjected to rib spalling can be solved; the method does not influence the production of the work surface, the mechanical properties of coal bodies are essentially improved, the completeness of the coal bodies is re-molded, and the method has a favorable popularization property.

The invention discloses a grouting connection structure based on a combined box-type substation foundation and a grouting method thereof. The structure includes an upper prefabricated wall, a connecting sleeve embedded in the lower end of the upper prefabricated wall, and a lower The connecting beam embedded in the upper end of the prefabricated wall and the lower prefabricated wall. The invention also discloses a grouting connection structure based on a combined box-type substation foundation and a grouting method thereof. The method includes the following steps: step 1: preparing materials; step Two: pairing; step three: add plugging; step four: preparation of grouting material; step five: grouting; step six: cleaning; the present invention improves the upper prefabricated wall and The butt joint installation efficiency of the lower prefabricated wall improves the construction efficiency of the entire box substation foundation; and through the connection structure of the connecting beam and the connecting sleeve, it improves the connection surface between the upper prefabricated wall and the lower prefabricated wall to form a strong enough Shear resistance.

The invention discloses a device and a method for calibrating a flowmeter of a grouting unit, comprising the following steps: initializing the calibrating sign of the flowmeter and the full scale value of the flowmeter; Check whether the slurry mixing system operates within the interval. If the slurry mixing system operates, initialize the initial slurry volume of the slurry mixing system and return to step 2; judge whether the system slurry injection rate is a small injection rate. If it is not a small injection rate, return to step 2. If it is small Injection rate, calibration flowmeter full scale value and set flowmeter calibration flag. The invention can use the machine to automatically measure the slurry volume of the slurry tank, and automatically calibrate the flowmeter, which can improve the automation level of the site, reduce supervision intervention and work intensity; control the key quality points of grouting, improve the quality of grouting, and reduce unnecessary grouting Time, improve the grouting progress.

The invention discloses a vacuum-assisted grouting device and method for bored cast-in-situ piles, which include a grouting pump, an outer grouting pipe, an inner grouting pipe, a grouting device, a vacuum pump, a vacuum chamber, an outer vacuum pipe, an inner vacuum pipe and a negative Pressure device; grouting holes are distributed on the grouting device and located in the crushed stone layer, negative pressure holes are distributed on the negative pressure device and located in the sand cushion layer, the negative pressure holes on the negative pressure device are covered with anti-sand cloth, sand cushion Layers are laid at the bottom of the pile, gravel layers are laid on the sand cushion, the lower end of the inner grouting pipe is connected to the grouting device, and the upper end extends out of the pile hole to be detachably connected with the outer grouting pipe, and the lower end of the inner vacuum pipe is connected to the negative pressure device , After the upper end extends out of the pile hole, it can be detachably connected with the outer vacuum tube. The upper ends of the inner grouting tube and the inner vacuum tube can be closed by the cap. The inner grouting tube, the grouting device and the inner vacuum tube are connected to the steel cage, and the bottom of the steel cage The end is located in the gravel layer, valves are provided on the outer grouting pipe and the outer vacuum pipe, and a valve and a vacuum degree detection piece are provided between the vacuum pump and the vacuum chamber. The post-grouting quality of the invention is high.

The present invention provides a plant growth regulator for promoting corn grain filling and its application, including the following effective active ingredients and auxiliary synergistic ingredients, wherein the effective active ingredients include: 1-30 parts of ethephon; 1.5 parts; the auxiliary and synergistic ingredients include: 1-5 parts of fatty glucosinolates; 1-5 parts of calcium salts; and 1-5 parts of magnesium salts. The plant growth regulator of the invention can significantly improve the grain filling speed of corn grains, can significantly shorten the grain filling time, and reduce the production cost; achieve the effect of increasing production.

The invention discloses an intelligent and dynamic monitoring system for mine grouting and a working method thereof. The system comprises grouting pipes, a ball valve, a grout recovery pump, a high-precision intrinsic safety type pressure sensor, a high-precision intrinsic safety type flow sensor, a grouting anchor rod positioning system, a grouting anchor rod, a stirring device, a mining area grout pump station, a data transmission system, a ground data acquisition system and a coal mine dispatching center, wherein a plurality of grouting connectors are arranged on the periphery of the miningarea grout pump station, and the grouting pipes are arranged on the sides, deviating from the mining area grout pump station, of the grouting connectors separately. Through interaction of the ball valve, the high-precision intrinsic safety type pressure sensor, the high-precision intrinsic safety type flow sensor, the grouting anchor rod positioning system, the grouting anchor rod and a ground data acquisition system, grouting parameters are accurately collected in the grouting process, the grouting effect is detected in real time, and the grouting anchor rod which does not reach the standardcan be timely repaired.

The invention discloses a grain injection device and a grain injection method. The grain injection device includes a grouting pipeline, and the grouting pipeline includes a first interface connected with a grouting hole and a first interface connected with a grouting pump. Two ports, the grouting pipeline is provided with a first gate valve on the side of the first port, a second gate valve on the side of the second port, and a third gate valve between the first gate valve and the second gate valve, the third gate valve Used to load grain into grain lines. The structure of the grain injection device of the present invention is simple, and the grain injection and grouting can be realized through the grouting pipeline and multiple gate valves; multiple branch pipelines alternately carry out grain injection and grouting, which can realize continuous operation, and the loaded grain can be continuously It is continuously fed into the borehole, which greatly improves the grouting efficiency and shortens the grouting time.

The invention discloses a tunnel secondary lining construction technology. The tunnel secondary lining construction technology comprises the following steps that S1, a secondary lining formwork trolley is manufactured according to tunnel design data; the secondary lining formwork trolley comprises a forming formwork part and a pouring part. And S2, side wall section layered pouring is conducted on the first-stage working window, the second-stage working window and the third-stage working window in sequence through a pouring part. And S3, concrete pouring is carried out on the arch crown section through the embedded pipe, and formwork grouting is carried out on the arch crown section through the grouting holes after pouring. And S4, the secondary lining formwork trolley is dismantled, and secondary lining maintenance is conducted. By means of window-by-window layered pouring of the secondary lining formwork trolley, the sand surface formed by vibrating and material driving and cold joints caused by pipe connecting delay can be effectively reduced, multiple same-level working windows are all utilized, and skip layer pouring and concentrated material distribution are avoided.

The invention provides a large-tonnage support locating grouting method. The large-tonnage support locating grouting method comprises the following steps of S1, fixedly connecting a plurality of steelmold pieces to enclose a grouting space of the large-tonnage support locating grouting, wherein the lower ends of the steel mold pieces are placed within a bearing pad stone; and S2, grouting the grouting space from bottom to top through a grouting passage formed in the bearing pad stone. According to the large-tonnage support locating grouting method, as the grouting space of the large-tonnage support locating grouting is grouted by using the mode from bottom to the top, the grouting time is reduced, the bubble eliminating efficiency is enhanced, bubbles, sinking, pitted surface, edge cornerslump and mortar leakage ratio on the surface of a mortar bed of a large-tonnage support can be reduced in a maximized manner, a problem of uncompacted grouting in the middle of the mortar bed of thelarge-tonnage support is reduced or avoided to prevent damages of the large-tonnage support, and meanwhile, the appearance quality of the mortar bed of the large-tonnage support is improved.

The invention discloses a pre-compacting and grouting reinforcement method for loose and weak strata suitable for shallow-buried tunnels, which includes testing the compaction performance of the stratum when the tunnel passes through the loose and weak stratum through experiments, and determining the ability of the stratum under different grouting pressures. The degree of compaction achieved, and the mechanical properties and impermeability properties corresponding to different compaction degrees; analyze the influence of different compaction degrees of formations and the thickness of the grouting reinforcement ring on the stability of tunnel excavation, so as to determine the target grouting pressure, grouting The thickness of the grout reinforcement ring; determine the maximum expansion radius of the expansive geotextile bag and the arrangement spacing of the grouting holes on the surface; make the grouting pipe with the expansive geotextile bag; implement the grouting hole drilling operation on the surface, and drill the grouting hole after reaching the predetermined depth. Insert the grouting pipe with expansive geotextile bag; use quick-setting grouting material for grouting, and stop grouting when the grouting pressure reaches the target grouting pressure; fill the gap between the grouting pipe and the grouting hole Closed; complete grouting of all grouting holes.

The invention discloses a method for evaluating the grouting effect of polymer grouting materials and the grouting material. The method mainly uses cement grouting materials with relatively mature grouting parameters as a comparison, and by comparing the filling rate, a polymer grouting material is selected. Grouting parameters of the material. The provided polymer grouting material includes two components, A and B. Component A consists of isocyanate, foaming agent, foam stabilizer, antistatic agent and epoxy resin and epoxy resin prepolymer diluent; component B It is composed of phosphoric acid, citric acid, polyol, water-soluble trihydroxy polyether, curing agent, flame retardant and plasticizer. The evaluation method of the present invention can optimize the grouting parameters, shorten the grouting time, save the grouting material, and the filling effect is good in the bolt construction process. Apply high preload to improve the support strength of surrounding rock.