17 results about "Permeation grouting" patented technology

The invention relates to an intelligent permeation grouting process and device for concrete crack self-repairing. The intelligent permeation grouting process and device are suitable for crack detection and repairing of a newly-built concrete structure. The device comprises a blood vessel network embedded into concrete, a crack detection sensor, a control module, a pumping module and a self-repairing material storage module, and automatic detection and repairing of cracks are achieved. The technological process comprises crack detection, data analysis, grouting parameter determination, material injection and repair monitoring. Through the automation and intelligence technology, the repairing efficiency and precision are remarkably improved, and the device is suitable for large structures such as bridges and tunnels.

The invention discloses a dynamic regulation and control method and a control system for tunneling and grouting reinforcement of a water-rich layered surrounding rock tunnel. The method comprises the following steps: acquiring bedding surface occurrence, water pressure, fault fracture zone, water seepage area distribution and other data by adopting advanced geological detection; in a layered surrounding rock section, grouting areas are divided according to a bedding dip angle, high-pressure splitting grouting is adopted in a bedding area, and permeation grouting is adopted in a cutting area; in the fault fracture section, fault fracture zone grouting areas are divided according to the fault width and the stratum condition, and anchor rods with different depths are adopted for grouting; the ratio of the nano-composite grout is dynamically adjusted based on the real-time water pressure of each grouting area; the grouting pressure and flow are dynamically adjusted through the intelligent adjusting and controlling system; and a transient electromagnetic method is adopted to evaluate the grouting effect, and secondary grouting is carried out to achieve reinforcement. The grouting parameters can be dynamically adjusted and controlled according to the bedding surface condition during grouting.

The invention belongs to the technical field of bridge engineering, and particularly relates to a construction method of a cylindrical pier. The method comprises the following steps that S10, a prefabricated part is manufactured, and the prefabricated part is a reinforcement cage containing graded coarse aggregate; s20, on-site construction of the bridge piers is conducted, construction of pile foundations and bearing platforms is completed in advance, and vertical connecting main ribs used for being connected with the bridge piers are pre-buried in the pile foundations and the bearing platforms; the set number of prefabricated parts are sequentially hoisted to the designed position and fixed into a whole; a vertical connecting main reinforcement at the top end of the bearing platform correspondingly penetrates through the main reinforcement penetrating piece and is lengthened to a set height; and an outer formwork system is installed, and vacuumizing is carried out to assist grouting. According to the method, the traditional process of pouring and vibrating concrete is revolutionarily converted into aggregate filling and permeation grouting, so that the structural performance and the construction efficiency are improved.

The invention relates to the field of tunnel radial grouting, in particular to a subsea tunnel radial grouting method which comprises the steps that an orifice outburst prevention device is installed; drilling a drill hole through the orifice pipe; performing permeation grouting: performing drilling grouting construction by adopting a retreating type sectional grouting process, performing high-pressure low-flow sectional circulating grouting, and performing permeation grouting on tunnel surrounding rock mass fractures; grout is injected into the surrounding rock mass through pressure feeding equipment, water or air is squeezed out, the grouting grout circulates in the grouting rock mass and a pipeline, the flow of a loop is adjusted in the circulation process, the grouting pressure is controlled, and cracks or fractures of the rock mass are continuously filled and permeated through the circulating grout under the pressure effect; by means of low-flow circulating pressure-by-pressure segmented grouting, rock mass fractures are evenly filled with grout, and after the grout is set and hardened, surrounding rock fractures or fractures are bonded and closed, and rock mass integrity is recovered; and filling and grouting are conducted, specifically, filling and grouting are conducted on the gap between the surrounding rock and the primary lining, so that the primary lining and the surrounding rock are tightly connected.

The application provides a modeling analysis method, device and system for a water-rich sand layer permeation grouting model test, belongs to the technical field of grouting model tests, and comprises the following steps: constructing a water-rich sand layer permeation grouting visual simulation device; acquiring three-dimensional structure information inside the simulation device in a water-rich sand layer permeation grouting test process, and generating time sequence voxel data; extracting features in the voxel data by using a convolutional neural network; reconstructing a three-dimensional model for each time sequence of voxel data according to the extracted features; quantitatively analyzing a slurry diffusion process based on the three-dimensional model of each time sequence, and calculating test parameters.

The invention discloses a deeply-buried loose water-containing sand layer permeation grouting diffusion simulation test device and method, and relates to the field of geotechnical engineering and underground engineering, the deeply-buried loose water-containing sand layer permeation grouting diffusion simulation test device comprises a modular test platform, a water supply assembly, a grouting assembly and a monitoring assembly, and the modular test platform comprises a test box body and an air bag assembly; a water injection port and a water outlet in the water supply assembly are formed in the two sides and the bottom of the test box body, a grouting pipe in the grouting assembly is arranged in the middle of a top air bag in the air bag assembly, and the displacement sensors are arranged on the inner side of a top plate and the inner sides of left and right side plates of the test box body. According to the deeply-buried loose water-containing sand layer permeation grouting diffusion simulation test device and method, the test platform is convenient to assemble, the operation process is simple, the device and method have important significance on improvement of the grouting transformation effect of a water-rich sand layer on site, and popularization and application of grouting transformation of a target sand layer in engineering practice are facilitated.

A method for simulating polyurethane permeation grouting diffusion includes constructing a geometric model of permeation grouting diffusion of polyurethane in a porous medium to be injected based on physical property data of the porous medium to be injected; establishing a physical field of the geometric model using a Richards equation and a dilute species transport equation for a porous medium, and adjusting the geometric model based on a material property parameter of the geometric model obtained based on the physical field; setting a boundary condition and an initial value for an adjusted geometric model, and performing mesh division on the adjusted geometric model based on a local refinement method to obtain a simulation model for permeation grouting diffusion; and solving the simulation model for permeation grouting diffusion using a transient solver to complete the simulation of permeation grouting diffusion of the polyurethane in the porous medium to be injected.

The application discloses a flexible shaft well structure with anti-seismic and anti-seepage functions and a construction method thereof, and belongs to the field of building construction. The flexible shaft well structure comprises a reinforced concrete lining and a load-bearing ring arranged outside the reinforced concrete lining, the load-bearing ring is formed by circumferentially overlapping a plurality of flexible piles around the reinforced concrete lining, the flexible piles are formed by consolidating a permeable polymer and sand, and a polymer waterproof shock insulation buffer layer is arranged between the reinforced concrete lining and the load-bearing ring, and the polymer waterproof shock insulation buffer layer is formed by expanding a polymer grouting layer. The shaft well structure has high anti-seismic and anti-seepage performances, and is suitable for a coastal coral sand reclamation layer. A flexible load-bearing ring with anti-seismic and anti-seepage functions is formed by polymer permeation grouting, a polymer waterproof shock insulation buffer layer is formed by grouting between the reinforced concrete lining structure and the load-bearing ring, and the whole structure has anti-seismic and anti-seepage effects. In the excavation process, complicated dewatering operations are not needed, and a large amount of financial resources and time are saved.

The invention discloses a sand liquefaction resistant prestressed concrete solid square pile and a construction method thereof.The square pile comprises a pile body made of concrete, prestressed main reinforcements, spiral stirrups and an end plate, the prestressed main reinforcements and the spiral stirrups are buried in the pile body, the end plate is arranged at the top of the pile body, a vertical drainage channel is formed in the pile body, and the vertical drainage channel is communicated with the pile body. Two ends of the vertical drainage channel are respectively closed at the pile top and the pile tip; radial permeable holes are formed in the section, expected to penetrate through the potential liquefied soil layer, of the lower portion of the pile body and communicate with the vertical drainage channel. According to the square pile, permeation grouting is conducted on the periphery of the pile body through the vertical drainage channels and the radial permeable holes, the performance of a soil body around the pile body is actively improved, passive liquefaction bearing is converted into active liquefaction restraining, and root causes are treated to clear sources.

This invention relates to the field of deep vertical shaft construction technology in fractured rock in water conservancy projects. Specifically, it discloses a method for large-diameter guide pipe permeation grouting consolidation construction in deep vertical shafts in fractured rock. Addressing the problem of loose rock mass and well-developed fissures after collapse of Class IV-V fractured rock deep vertical shafts, this method uses a 150mm large-diameter borehole to reach a depth of 60-70m into the collapsed rock mass. A steel perforated pipe with grouting holes is processed as a grouting guide pipe, and a flocculent grouting material mixed with admixtures is injected into the hole. The grout's own weight creates high pressure, achieving natural diffusion and permeation, fully filling the pores, fissures, and voids in the rock mass. After solidification, the loose fractured rock mass is cemented into a solid, unified shell. This method can achieve a single grouting depth of up to 60m, with grouting efficiency far exceeding traditional segmented grouting. It is highly adaptable to particularly fractured rock masses and collapsed areas, and the consolidation effect is significant. It provides reliable surrounding rock stability for secondary excavation of the shaft, solving the technical problem of difficult and ineffective consolidation of the shaft wall in deep vertical shafts in fractured rock.

The application discloses a kind of based on dynamic proportioning regulation and control's powder fine sand layer slurry stratified permeation grouting method, determine the particle size distribution of target reinforcement area;Further, the target reinforcement area is divided into coarse particle zone, medium particle zone and fine particle zone;And calculate the design grouting amount of each area;Each area determines the corresponding composite slurry respectively, composite slurry is made by strong permeability slurry and weak permeability slurry proportioning, and determine the design reference particle size after each area grouting;Coarse particle zone, medium particle zone and fine particle zone are sequentially grouted and reinforced;During the grouting process in each area, if it meets the termination grouting condition, then the grouting of the area is completed;And during the grouting process, according to the deviation of measured particle size and design reference particle size in a certain area, the proportioning of the composite slurry of the area is dynamically adjusted, so that the measured particle size after grouting is as close to the design reference particle size as possible;So as to ensure that different particle size powder fine sand layer reaches the required effect after grouting and reinforcement.

The application discloses a kind of advance reinforcement construction methods before shield machine of seabed soft stratum dismantling. It mainly includes: S1 re-measurement control network;S2 special lining section excavation, segment pre-buried arc steel plate;S3 confirm shutdown mileage;S4 make water sealing ring;S5 stop steel plate and pre-buried steel plate, shield shell full welding, adjacent steel plate arc-shaped plugging steel plate is welded and closed shield tail gap;S6 shield body grouting;After slurry chamber washing chamber, from bottom to top layered grouting, top bypass circulation maintains pressure balance;S7 according to three major standards of limiting reliable, sealing no penetration, environmental safety acceptance after segmented dismantling;S8 layered filling plain concrete;Pouring reinforced concrete plugging wall and segment pre-buried steel plate welding anchoring, wall top reserved grouting hole, after curing, grouting hole sealing. It aims at solving high water pressure pushback, strong water permeation grouting loss, soft soil plugging cracking and dismantling risk uncontrollable problem.The application mainly has the following innovative points: rigid self-locking anti-retreat structure, replacement grouting principle, pre-dismantling acceptance system, anchoring type permanent plugging;It is suitable for seabed soft stratum shield tunnel dismantling engineering.

The invention discloses a silty-fine sand layer slurry layered permeation grouting method based on dynamic proportion regulation and control. The method comprises the steps that particle size distribution of a target reinforcement area is determined; dividing the target reinforcing area into a coarse particle area, a medium particle area and a fine particle area; the designed grouting amount of each area is calculated; corresponding composite grout is determined for each area, the composite grout is prepared from grout with high permeability and grout with low permeability according to the proportion, and the design reference particle size of each area after grouting is determined; the coarse particle area, the medium particle area and the fine particle area are sequentially subjected to grouting reinforcement; in the grouting process of each area, if the grouting stopping condition is met, grouting of the area is completed; in the grouting process, according to the deviation condition of the actually-measured particle size and the designed reference particle size in a certain area, the proportion of the composite grout in the area is dynamically adjusted, and therefore the actually-measured particle size after grouting is close to the designed reference particle size as much as possible; therefore, the silty-fine sand layers with different particle sizes can achieve the required effect after grouting reinforcement.

The invention relates to the technical field of tunnel construction, and provides a directional grouting device and a tunnel reinforcing method. The directional grouting device comprises a support, a first container, a second container, a grouting pipe, a first grout stopping bag, a second grout stopping bag and a third grout stopping bag, the first grout stopping bag and the second grout stopping bag are located on the two sides of the grout outlet hole respectively, grout is filled in the first grout stopping bag and the second grout stopping bag, and mixed liquid of the grout and coagulant aids is filled in the third grout stopping bag. According to the directional grouting device, a closed area is formed between the first grout stopping bag and the second grout stopping bag, the grouting pressure in the area can be increased and is stable, high-pressure grouting can be achieved, permeation grouting can be well conducted on an area with poor permeability, and meanwhile the grouting efficiency is improved. And during secondary grouting, the grouting holes where grouting is completed can be blocked through the third grout stopping bag, follow-up grout is prevented from overflowing, the grouting amount needed in the current area can be guaranteed, and the high-quality grouting effect is guaranteed.

The invention provides a magnetic anchoring grading grouting plugging method based on tunnel large-flow high-flow-speed sudden gushing water. The method comprises the steps that a magnetic control system generates a controllable magnetic field through an electromagnetic-permanent magnet composite base; the magnetic anchoring anti-impact framework is formed by iron ore aggregate with specific gradation; the grouting system realizes graded grouting through double grouting pipes; the monitoring system monitors flow velocity, pressure and grouting parameters in real time through a sensor. During implementation, the electromagnetic-permanent magnet composite base is installed and filled with graded aggregate to form a magnetic adsorption framework, then the water flow system is started to simulate the sudden water gushing working condition, then low-pressure permeation grouting is conducted through the short grouting pipe to fill framework pores, high-pressure grouting is conducted through the long grouting pipe to form a surface sealing layer, and the surface sealing layer is sealed. And finally regulating the magnetic field intensity and evaluating the plugging performance. A complete plugging system penetrating from inside to surface sealing is realized by adopting a graded grouting process; construction efficiency and long-term safety are both considered through intelligent magnetic field regulation and control; and the engineering applicability of emergency plugging is improved.

This utility model relates to a long-term impermeability testing device for sand layer permeability grouting solidified blocks. Two test supports symmetrically arranged on the top of the workbench hold solidified block test pieces. The two test supports enable simultaneous comparative experiments on solidified block test pieces made with different formulations. The testing device also includes: a pushing mechanism installed on the top of the workbench, positioned between the two test supports, used to pressurize and push water out; and a conveying mechanism installed on the top of the workbench, connecting to the pushing mechanism and the two test supports to disperse and deliver water into the two test supports, enabling pressurized water injection testing of the two solidified block test pieces. This utility model, with its two test supports, allows for lateral comparative testing of solidified block test pieces with different formulation ratios. Furthermore, during testing, the two solidified block test pieces can be quickly and conveniently assembled to detect their performance.