Multistage pressurized grouting test device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAOXING MUNICIPAL DESIGN INST
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-07
Smart Images
Figure CN224471493U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of grouting test devices, and in particular to a multi-stage pressurized grouting test device. Background Technology
[0002] Geological engineering techniques are used to alter the process of disaster occurrence and prevent or mitigate its impact. High-pressure equipment is used to inject solidified grout (such as cement grout or chemical grout) into the foundation soil. The pressure drives the grout to penetrate, fill, or split the strata to form a continuous solidified body. For grouting techniques on highly compressible soft soil foundations such as silt and silty soil, the low permeability characteristics of soft soil need to be adapted. Chemical grout or ultrafine cement grout is often used to improve permeability. In order to achieve a good grouting effect, the grouting operation is simulated in advance using a model box.
[0003] Traditional grouting devices mostly use hydraulic pumps or piston-type pressure devices to generate grouting pressure through mechanical transmission. The grout is injected into the simulated formation through a single pressure source. The pressure is recorded manually. Single-stage pressurization is difficult to simulate the response of complex formations and is prone to overpressure fracturing or insufficient penetration, which reduces the overall grouting effect. Utility Model Content
[0004] To overcome the limitations of grouting devices that generate grouting pressure through mechanical transmission and inject grout into simulated formations via a single pressure source, relying on manual pressure recording, single-stage pressurization is insufficient to simulate complex formation responses and is prone to overpressure fracturing or insufficient permeability. This invention provides a multi-stage pressurization grouting test device.
[0005] The technical solution is as follows: a multi-stage pressure grouting test device, including a simulation test chamber, a control box, a solution tank, a fixed frame, and multi-stage pressure grouting components; a simulation test chamber for storing and placing different soil layers; a control box for mounting and controlling the solution tank is provided on the outside of the simulation test chamber; solution tanks for storing a single solvent are symmetrically arranged on the control box; a fixed frame for supporting and maintaining the stability of the pressure grouting test is fixedly connected to the control box; and multi-stage pressure grouting components are provided on the fixed frame that extend into the simulation test chamber to conduct multi-stage pressure grouting tests.
[0006] Furthermore, a quick-release base plate is installed at the bottom of the simulation test chamber, and a protective sleeve is fitted around the quick-release base plate. Adjustment columns for positioning the simulation test chamber are inserted at all four corners of the protective sleeve. One end of the adjustment column is connected to a first locking bolt. Mounting holes are opened at all four sides of the simulation test chamber, and connecting columns are provided at all four corners of the inner side of the simulation test chamber.
[0007] Furthermore, several layered blocks are linearly sleeved on the connecting column, and a layered plate fixed to the layered blocks is provided between the two sets of connecting columns. A positioning frame with an insertion mounting hole is connected to the top of the connecting column, and a second locking bolt is connected to the positioning frame. Several sets of ultrasonic interactive modules are distributed on the staggered layered plates around the inner side wall of the simulation test chamber.
[0008] Furthermore, the ultrasonic interactive module includes an ultrasonic transmitter, an ultrasonic receiver, and a lithium battery module that are electrically connected to each other. The simulation test chamber is electrically connected to signal cables at different positions from low to high, and the signal cables are electrically connected to a display screen.
[0009] Furthermore, the control box contains an electrical distribution box and control buttons that are electrically connected to each other. The solution tank is covered with a heat insulation cover, and a sealing cover is connected to the bottom of the solution tank. A filling pipe is fixed to the outside of the solution tank, and an extraction pipe is connected to the top of the solution tank. A lifting pump is connected to the center of the top of the extraction pipe, and a lifting motor is located at the center of the lifting pump. A delivery pipe connected to a multi-stage pressurized grouting assembly is connected to the extraction pipe near the lifting pump. A pressure gauge is connected to the outside of the extraction pipe.
[0010] Furthermore, the multi-stage pressurized grouting assembly includes a swing arm, a primary grouting pipe, a secondary grouting pipe, and a tertiary grouting pipe. One end of the swing arm is fitted with a push rod that passes through a fixed carrier. One end of the push rod is connected to a cylinder. The cylinder drives the push rod to move the swing arm up and down. A rotating ring is provided between the push rod and the swing arm. A drive motor is connected to the top of the rotating ring. The drive motor drives the rotating ring to move the swing arm. A conduit connected to the delivery pipe is provided at the center of the swing arm.
[0011] Furthermore, the swing arm is linearly and sequentially equipped with primary grouting pipes, secondary grouting pipes, and tertiary grouting pipes of varying lengths that extend into different layers and communicate with the conduit. The bottom of each of the primary, secondary, and tertiary grouting pipes is fixed with a grouting head, and one end of the conduit is connected to a pressure sensor.
[0012] Furthermore, the tops of the primary, secondary, and tertiary grouting pipes are all connected to grouting pumps, and the grouting pumps are equipped with a wireless module and a lithium battery module at their center.
[0013] The beneficial effects are: This utility model realizes the coordinated work of the primary grouting pipe, the secondary grouting pipe and the tertiary grouting pipe with the independent grouting pump, which can achieve step-by-step pressure regulation, effectively avoid the problems of overpressure fracturing or insufficient permeability caused by single-stage pressurization, and is suitable for different permeability strata such as sand and rock.
[0014] Integrating pressure sensors and ultrasonic interaction modules, it collects slurry diffusion radius and formation response data in real time and transmits them to the display screen via signal cables, reducing errors from manual recording. The combination design of layered blocks and layered plates allows for rapid adjustment of soil layer thickness and porosity. Combined with a quick-release base plate and protective sleeve, it improves experimental efficiency and safety. Attached Figure Description
[0015] Figure 1 This is a three-dimensional schematic diagram of the multi-stage pressurized grouting test device of this utility model;
[0016] Figure 2 This is a schematic diagram of the simulation test chamber of this utility model;
[0017] Figure 3 This is a schematic diagram of the control box and solution tank of this utility model;
[0018] Figure 4 This is a schematic diagram of the multi-stage pressurized grouting assembly of this utility model;
[0019] Figure 5 This is another schematic diagram of the multi-stage pressurized grouting assembly of this utility model.
[0020] In the attached diagram, the following are the reference numerals: 1. Simulation test chamber; 2. Control box; 3. Solution tank; 4. Fixed frame; 5. Multi-stage pressurized grouting assembly; 101. Quick-release base plate; 102. Protective sleeve; 103. Adjusting column; 104. First locking bolt; 105. Layered block; 106. Connecting column; 107. Layered plate; 108. Mounting hole; 109. Positioning frame; 110. Second locking bolt; 111. Ultrasonic interactive module; 112. Signal cable; 113. Display screen; 201. Distribution box; 202. Control button; 301. Injection pipe; 302. Sealing cover; 303. Insulation cover; 304. Pressure gauge; 305. Extraction pipe; 306. Lifting pump; 307. Delivery pipe; 501. Swing arm; 502. Pressure sensor; 503. Conduit; 504. Rotating ring; 505. Drive motor; 506. Primary grouting pipe; 507. Grouting head; 508. Grouting pump; 509. Wireless module; 510. Cylinder; 511. Secondary grouting pipe; 512. Tertiary grouting pipe. Detailed Implementation
[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0022] Geological disaster prevention and control, as an important topic in modern geotechnical engineering, focuses on altering the process of geological disaster formation through effective geological engineering techniques to prevent or mitigate their occurrence. According to the "Regulations on Geological Disaster Prevention and Control," geological disasters include landslides, mudslides, debris flows, ground subsidence, ground fissures, and ground settlement—disasters related to geological processes that endanger people's lives and property, caused by natural factors or human activities. my country's geological disaster prevention and control work adheres to the principle of "prevention first, combined with avoidance and remediation," among which grouting technology, as a proactive remediation method, plays an irreplaceable role in various geological disaster prevention and control projects.
[0023] Traditional grouting technology originated from mine water-blocking projects in the early 20th century. After more than a century of development, it has formed a variety of process systems, including permeation grouting, fracturing grouting, compaction grouting, and jet grouting. With the acceleration of urbanization and the extension of infrastructure construction to areas with complex geological conditions, the requirements for grouting technology are increasing. Especially in the field of soft soil foundation treatment, conventional grouting technology faces many challenges: soft soil has characteristics such as high water content, large void ratio, low permeability coefficient, and significant structural properties, making it difficult for ordinary cement grout to penetrate effectively; at the same time, the response mechanism of soft soil under grouting pressure is complex, and improper grouting parameters can easily cause soil disturbance and damage rather than reinforcement.
[0024] Scientific problems and technical bottlenecks in soft soil grouting technology
[0025] Grouting technology for soft soil faces three key scientific challenges in practical engineering applications: the grout-soil interaction mechanism, the law of grouting pressure transmission, and the method for evaluating reinforcement effectiveness. These issues directly limit the reliability and economy of grouting technology in soft soil foundation treatment.
[0026] Regarding grout-soil interactions, the low permeability of soft soil (typically a permeability coefficient k < 10 cm / s) makes it difficult for traditional cement grouts (particle size 5-80 μm) to penetrate effectively. Studies have shown that effective penetration can only be achieved when the grout particle size is less than 1 / 3 of the soil pore diameter. This has prompted the engineering community to develop ultrafine cement grouts (particle size 3-10 μm) and chemical grouts (such as silicate and acrylate grouts), but these are costly and may pose environmental pollution risks. Furthermore, the solidification process of grout in soft soil involves complex physicochemical reactions, including water migration, ion exchange, and gelation, which are influenced by multiple factors including the initial soil state, grout properties, and environmental conditions.
[0027] In terms of grouting pressure control, grouting equipment with a single pressure source is difficult to adapt to the heterogeneity of soft soil strata. Soft soil layers often exhibit significant differences in stratification structure and stress history, and the critical splitting pressure of soil at different depths can vary by several times. Using a fixed grouting pressure can easily lead to splitting failure of shallow soil (excessive pressure) or insufficient reinforcement of deep soil (insufficient pressure). In addition, manually recording pressure data is inefficient and prone to errors, making it difficult to reflect dynamic changes during the grouting process in a timely manner.
[0028] In terms of effect evaluation, existing technologies mostly rely on destructive testing methods such as core drilling and standard penetration tests. These methods are not only costly and time-consuming, but also only provide data for discrete points, failing to comprehensively assess the continuity and uniformity of the reinforced body. While non-destructive testing methods such as ultrasonic testing and resistivity testing have some applications, they lack real-time linkage with the grouting process, making it difficult to provide immediate feedback for optimizing grouting parameters.
[0029] The development of a multi-stage pressure grouting test device will bring three engineering application breakthroughs to soft soil grouting technology:
[0030] In geological disaster prevention and control engineering, this technology can effectively treat the weak zone at the leading edge of landslides, the loose mass in debris flow accumulation areas, and the compressible layer in ground subsidence areas. Optimized parameters determined through model tests can improve the accuracy of on-site grouting, avoiding resource waste and secondary disasters caused by blind grouting.
[0031] In infrastructure construction projects, this technology is particularly suitable for treating soft soil foundations sensitive to differential settlement, such as high-speed railway subgrades, cross-sea bridge pile foundations, and underground utility tunnels. The graded grouting process allows for differentiated reinforcement of soil at different depths, ensuring the stability of shallow soil while improving the bearing capacity of deeper soil layers.
[0032] In the field of emergency rescue engineering, the combination of multi-stage pressurized grouting technology and emergency resource support systems can provide a rapid reinforcement solution for sudden geological disasters. The miniaturized design of the device facilitates rapid on-site deployment, and its real-time monitoring function provides a reliable basis for rescue decision-making, significantly improving the timeliness and scientific nature of emergency response.
[0033] With the in-depth implementation of regulations such as the "Sichuan Province Geological Disaster Prevention and Control Regulations," geological disaster prevention and control work will place greater emphasis on technological innovation and scientific prevention. The widespread application of multi-stage pressure grouting test devices will strongly promote the transformation of grouting technology from "experience-driven" to "data-driven," providing key technical support for building a safe, efficient, and economical geological disaster prevention and control system. In the future, this technology can also be deeply integrated with digital tools such as BIM and GIS to achieve intelligent management of the entire process of grouting design, construction, and monitoring, further enhancing my country's international competitiveness in the field of geological disaster prevention and control.
[0034] like Figures 1-5 As shown, the multi-stage pressure grouting test device includes a simulation test chamber 1, a control box 2, a solution tank 3, a fixed frame 4, and a multi-stage pressure grouting assembly 5. The simulation test chamber 1 is used to store and place different soil layers. The control box 2 is provided on the outside of the simulation test chamber 1 for mounting and controlling the solution tank 3. The solution tank 3 for storing a single solvent is symmetrically arranged on the control box 2. The fixed frame 4 is fixedly connected to the control box 2 to support and maintain the stability of the pressure grouting test. The multi-stage pressure grouting assembly 5 is provided on the fixed frame 4 to extend into the simulation test chamber 1 for multi-stage pressure grouting test.
[0035] Please see Figures 2-4 In this embodiment, a quick-release base plate 101 is installed at the bottom of the simulation test chamber 1. A protective sleeve 102 is fitted around the quick-release base plate 101. Adjustment columns 103 for positioning the simulation test chamber 1 are inserted through the corners of the protective sleeve 102. One end of the adjustment column 103 is connected to a first locking bolt 104. Mounting holes 108 are opened around the four sides of the simulation test chamber 1. Connecting columns 106 are provided at the four corners of the inner side of the simulation test chamber 1. Several layered blocks 105 are linearly fitted on the connecting columns 106. A layered plate 107 is fixed to the layered block 105 between two sets of connecting columns 106. A positioning frame 109 is connected to the top of the connecting column 106 and inserted into the mounting hole 108. A second locking bolt 110 is connected to the positioning frame 109. Several sets of ultrasonic interactive modules 111, model HY-SRF05 (40kHz), are distributed around the four sides of the inner side wall of the simulation test chamber 1.
[0036] Please see Figures 3-4 In this embodiment, the ultrasonic interactive module 111 includes an ultrasonic transmitter, an ultrasonic receiver, and a lithium battery module (model 18650) that are electrically connected to each other. The simulation test chamber 1 is electrically connected to signal cables 112 from low to high positions. The signal cables 112 are electrically connected to a display screen 113. The control box 2 is equipped with a distribution box 201 and control buttons 202 that are electrically connected to each other. The solution tank 3 is covered with a heat insulation cover 303. The bottom of the solution tank 3 is connected to a sealing cover 302. The solution tank 3 is fixed to the outside of a filling pipe 301. The top of the solution tank 3 is connected to an extraction pipe 305. The top center of the extraction pipe 305 is connected to a lifting pump 306. The center of the lifting pump 306 is equipped with a lifting motor. The extraction pipe 305 is connected to a delivery pipe 307 connected to the multi-stage pressurized grouting assembly 5 near the lifting pump 306. The extraction pipe 305 is externally connected to a pressure gauge 304.
[0037] Please see Figures 4-5In this embodiment, the multi-stage pressurized grouting assembly 5 includes a swing arm 501, a primary grouting pipe 506, a secondary grouting pipe 511, and a tertiary grouting pipe 512. A push rod passing through a fixed carrier 4 is mounted on one end of the swing arm 501. A cylinder 510 is connected to one end of the push rod, which drives the push rod to raise and lower the swing arm 501. A rotating ring 504 is provided between the push rod and the swing arm 501. A drive motor 505 is connected to the top of the rotating ring 504, which drives the rotating ring 504 to swing the swing arm 501. A conduit 503 communicating with the delivery pipe 307 is located at the center of the swing arm 501. The primary grouting pipe 506, the secondary grouting pipe 511, and the tertiary grouting pipe, of varying lengths and extending to different levels, are linearly arranged on the swing arm 501 and communicate with the conduit 503. 512, Primary grouting pipe 506, Secondary grouting pipe 511, and Tertiary grouting pipe. Each of the 512 units has a grouting head 507 fixed to its bottom. One end of the conduit 503 is connected to a pressure sensor 502 (Honeywell26PCFFA6D), a primary grouting pipe 506, a secondary grouting pipe 511, and a tertiary grouting pipe. Each of the 512 units has a grouting pump 508 (57BYG-76 stepper motor) connected to its top. The grouting pump 508 has a wireless module 509 (ESP32-WROOM-32D) and a lithium battery module at its center.
[0038] Based on the layered soil condition, the combination of layering block 105 and layering plate 107 can adjust the soil layer thickness. The quick-release base plate 101 facilitates the replacement of media with different porosities. The layering block 105 and layering plate 107 are adjusted up and down along the adjusting column 103. Soil and gravel layers are laid sequentially to fill the simulation test chamber 1. Slurry is injected into the solution tank 3 through the injection pipe 301. The lifting motor controls the slurry to enter the delivery pipe 307 from the lifting pipe and simultaneously enter the conduit 503. The pressure gauge 304 is used for display. The control button 202 sets the pressure threshold. The cylinder 510 and push rod... The system coordinates the lifting and lowering of the grouting pipes to ensure precise positioning in different soil layers. The drive motor 505 adjusts the angle of the swing arm 501, the grouting pump 508 starts in stages, and the pressure sensor 502 provides real-time feedback and dynamically adjusts the flow rate. The first-stage grouting pipe 506 (short pipe) injects grout under low pressure (0.1–0.5 MPa) to initially fill the loose surface soil layer, preventing splitting caused by high pressure. The second-stage grouting pipe 511 (medium-long pipe) applies medium pressure (0.5–1.2 MPa) to penetrate into the middle layer fissures, suitable for medium-permeability strata such as sand and the third-stage grouting pipe. The 512 (long pipe) uses high pressure (1.2–2.0 MPa) to compact deep pores, forming a continuous solidified body and improving bearing capacity. The ultrasonic interactive module 111 emits 40kHz sound waves, and the receiver detects the grout filling status, generating a three-dimensional image of the diffusion path.
[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A multi-stage pressure grouting test device, comprising a simulation test chamber (1), characterized in that: It also includes a control box (2), a solution tank (3), a fixed frame (4) and a multi-stage pressurized grouting assembly (5); a simulation test box (1) for storing and placing different soil layers is provided on the outside of the simulation test box (1) for mounting and controlling the solution tank (3), and a solution tank (3) for storing a single solvent is symmetrically provided on the control box (2). A fixed frame (4) for supporting and maintaining the stability of the pressurized grouting test is fixedly connected to the control box (2), and a multi-stage pressurized grouting assembly (5) is provided on the fixed frame (4) for extending into the simulation test box (1) to conduct multi-stage pressurized grouting tests.
2. The multi-stage pressurized grouting test device according to claim 1, characterized in that, The bottom of the simulation test chamber (1) is equipped with a quick-release base plate (101), and a protective sleeve (102) is fitted around the quick-release base plate (101). Adjustment columns (103) for positioning the simulation test chamber (1) are connected to the corners of the protective sleeve (102). One end of the adjustment column (103) is connected to a first locking bolt (104). Mounting holes (108) are opened around the top of the simulation test chamber (1), and connecting columns (106) are provided at the corners of the inner side of the simulation test chamber (1).
3. The multi-stage pressurized grouting test device according to claim 2, characterized in that, Several component layer blocks (105) are linearly sleeved on the connecting column (106). A layer plate (107) fixed to the layer block (105) is provided between two sets of connecting columns (106). A positioning frame (109) with an insertion mounting hole (108) is connected to the top of the connecting column (106). A second locking bolt (110) is connected to the positioning frame (109). Several sets of ultrasonic interactive modules (111) are distributed on the inner sidewall of the simulation test chamber (1).
4. The multi-stage pressurized grouting test device according to claim 3, characterized in that, The ultrasonic interactive module (111) includes an ultrasonic transmitter, an ultrasonic receiver and a lithium battery module that are electrically connected to each other. The simulation test box (1) is electrically connected to signal cables (112) from low to high for different positions. The signal cables (112) are electrically connected to a display screen (113).
5. The multi-stage pressurized grouting test device according to claim 1, characterized in that, The control box (2) is equipped with an electrical distribution box (201) and control buttons (202) that are electrically connected to each other. The solution tank (3) is covered with a heat insulation cover (303). The bottom of the solution tank (3) is connected to a sealing cover (302). The outside of the solution tank (3) is fixedly connected to a filling pipe (301). The top of the solution tank (3) is connected to an extraction pipe (305). The top center of the extraction pipe (305) is connected to a lifting pump (306). The center of the lifting pump (306) is equipped with a lifting motor. The extraction pipe (305) is connected to a delivery pipe (307) that connects to the multi-stage pressurized grouting assembly (5) near the lifting pump (306). The outside of the extraction pipe (305) is connected to a pressure gauge (304).
6. The multi-stage pressurized grouting test device according to claim 5, characterized in that, The multi-stage pressurized grouting assembly (5) includes a swing arm (501), a primary grouting pipe (506), a secondary grouting pipe (511), and a tertiary grouting pipe (512). One end of the swing arm (501) is provided with a push rod that passes through a fixed carrier (4). One end of the push rod is connected to a cylinder (510). The cylinder (510) drives the push rod to move the swing arm (501) up and down. A rotating ring (504) is provided between the push rod and the swing arm (501). A drive motor (505) is connected to the top of the rotating ring (504). The drive motor (505) drives the rotating ring (504) to move the swing arm (501) to swing. A conduit (503) connected to the delivery pipe (307) is provided at the center of the swing arm (501).
7. The multi-stage pressurized grouting test device according to claim 6, characterized in that, The swing arm (501) is linearly arranged with a primary grouting pipe (506), a secondary grouting pipe (511) and a tertiary grouting pipe (512) of different lengths that penetrate into different layers and communicate with the conduit (503). The bottom of the primary grouting pipe (506), the secondary grouting pipe (511) and the tertiary grouting pipe (512) are all fixedly connected with grouting heads (507). One end of the conduit (503) is connected to a pressure sensor (502).
8. The multi-stage pressurized grouting test device according to claim 7, characterized in that, The top of the primary grouting pipe (506), the secondary grouting pipe (511) and the tertiary grouting pipe (512) are all connected to a grouting pump (508), and the center of the grouting pump (508) is equipped with a wireless module (509) and a lithium battery module.