A sealing device for segmental grouting of an aquifer
By designing the connection pipe and the cooperation between the rotating plate and the rubber plate in the sealing device for segmented grouting of aquifers, the problem of tight contact between the existing device and the mortar during recycling was solved, achieving efficient sealing and low-cost recycling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZAOZHUANG MINING GRP ZHONGXING JIANAN ENG CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-05-29
AI Technical Summary
When using existing sealing devices for segmented grouting of aquifers, the single-layer sealing structure mostly relies on changes in the overall shape to support and seal the gaps, resulting in close contact with the mortar, which increases the difficulty of relocation and recycling and the cost of use.
A sealing device for segmented grouting of aquifers is designed. By connecting the pipe and the rotating plate and connecting rubber plate, the rotating plate and the rubber plate are opened by the pushing force of the mortar to contact the hole wall, so as to achieve the sealing effect. When recycling, the rotating sealing plate can be freely reset to reduce contact with the mortar.
This method effectively seals the hole wall during grouting, while reducing the difficulty and cost of recycling and improving the efficiency of the equipment.
Smart Images
Figure CN224300855U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of grouting and sealing technology, and in particular to a sealing device for segmented grouting of aquifers. Background Technology
[0002] Aquifer grouting is a widely used technique in underground engineering construction, primarily used to address problems arising from unfavorable geological conditions in aquifers. In underground engineering projects such as mining, unfavorable geological bodies or fault fracture zones often contain numerous joints, pores, and fissures, which have good water conductivity. Construction disturbances can easily lead to rock mass fracturing and damage, inducing engineering accidents such as water inrush and collapse. Aquifer grouting involves injecting pre-prepared grout into the rock mass to be grouted. Through processes such as infiltration, diffusion, and solidification, the fractured rock mass is bonded or sealed, thereby improving the stability of the rock mass and ensuring the stable progress of underground engineering. During construction, grouting anchors are often used for grouting. During grouting, it is necessary to ensure a good seal to close the borehole and prevent grout overflow and cross-contamination.
[0003] Most existing sealing devices for segmented grouting of aquifers are equipped with a single-layer sealing structure. During use, the grout gradually approaches the sealing structure and supports and reinforces it. However, the single-layer sealing structure mostly relies on changes in its overall shape to support and seal gaps. Moreover, this change is in close contact with the grout, which increases the difficulty of moving and recycling the device, thus increasing the operating cost of the sealing device for segmented grouting of aquifers.
[0004] Therefore, in view of the problem that the existing sealing devices for segmented grouting of aquifers rely on changes in the overall shape to support and seal the gaps when in use, and the close contact between the changes and the mortar increases the difficulty of moving and recycling, thus increasing the cost of using the sealing devices for segmented grouting of aquifers, a sealing device for segmented grouting of aquifers can be designed. Utility Model Content
[0005] In order to overcome the problem that existing sealing devices for segmented grouting of aquifers rely on changes in the overall shape to support and seal gaps during use, and that these changes result in close contact with the mortar, making it more difficult to move and recover, thus increasing the cost of using the sealing devices for segmented grouting of aquifers.
[0006] The technical solution of this utility model is as follows: a sealing device for segmented grouting of aquifers, including a hollow grouting anchor body; and a connecting pipe and an installation pipe. A connecting grouting anchor body is provided at the upper end of the hollow grouting anchor body. A connecting pipe for extending the connecting anchor body is provided between the hollow grouting anchor body and the connecting grouting anchor body. An installation pipe is provided on the outside of the connecting pipe. The installation pipe is threadedly connected to the hollow grouting anchor body and the connecting grouting anchor body. A first mounting platform is fixedly connected to the upper end of the installation pipe. A mounting seat is fixedly connected to the upper end of the first mounting platform. A second mounting platform is fixedly connected to the lower end of the installation pipe. A rotating plate is rotatably connected to the outside of the second mounting platform. A connecting rubber plate for receiving mortar is installed between the rotating plates. A rotating seat is fixedly connected to the lower end of the first mounting platform. A rotating sealing plate is rotatably connected to the inside of the rotating seat.
[0007] Preferably, grouting is performed by connecting the hollow grouting anchor body and the connecting grouting anchor body through a connecting pipe, and grouting is performed in conjunction with the installation pipe through the connecting pipe. At the same time, mortar is received by a rotating plate and a connecting rubber plate, and then the rotating plate and the connecting rubber plate are unfolded to contact the hole wall to achieve a sealing effect. Meanwhile, the received mortar gradually increases, which in turn pushes the rotating sealing plate to further seal the hole wall.
[0008] Preferably, both the hollow grouting anchor body and the inner side of the connecting grouting anchor body are provided with mating holes, a central pipe is fixed to the outer side of the mating holes, and a positioning screw hole is provided on the inner side of the central pipe.
[0009] Preferably, a nut body is threadedly connected to the outer side of the grouting anchor body, and a washer body is installed at the lower end of the nut body. The washer body is bolted to the mounting seat.
[0010] Preferably, an external connection hole is provided on the outer side of the connecting pipe, and a connecting pipe is fixedly connected to both the upper and lower ends of the connecting pipe.
[0011] Preferably, the connecting pipe is slidably connected to the hollow grouting anchor body and the connecting grouting anchor body through a mating hole, and a limit groove is opened on the inner side of the connecting pipe.
[0012] Preferably, a limiting block is slidably connected to the inner side of the limiting groove, and a threaded pipe is fixedly connected to the outer side of the limiting block. The threaded pipe and the central pipe are threadedly connected through a positioning screw hole. A connecting pipe is fixedly connected to the outer side of the threaded pipe, and the connecting pipe and the connecting pipe are slidably connected.
[0013] Preferably, an outer connecting pipe is fixed to the outside of the installation pipe, and a connecting groove is opened on the inside of the outer connecting pipe.
[0014] Preferably, a movable plug is slidably connected to the inner side of the connecting groove, and a baffle plate is installed on the outer side of the movable plug, with the baffle plate slidably connected to the outer pipe.
[0015] The beneficial effects of this utility model are:
[0016] This sealing device for segmented grouting of aquifers connects the hollow grouting anchor body and the connecting grouting anchor body via a connecting pipe for grouting. A rotating plate and connecting rubber plate collect the mortar, and then the rotating plate and connecting rubber plate unfold to contact the borehole wall, achieving a sealing effect. Simultaneously, the collected mortar gradually increases, further pushing the rotating sealing plate to seal the borehole wall. During recovery, the rotating plate and connecting rubber plate have minimal contact with the sealing mortar, and the rotating sealing plate can freely reset for easy recovery. Attached Figure Description
[0017] Figure 1 The diagram shown is a partial cross-sectional perspective view of the overall structure of this utility model.
[0018] Figure 2 The diagram shown is a partial cross-sectional three-dimensional structural schematic of the hollow grouting anchor rod of this utility model.
[0019] Figure 3 The diagram shown is a partial cross-sectional perspective view of the connecting pipe of this utility model.
[0020] Figure 4 The diagram shown is a partial cross-sectional perspective view of the installation tube of this utility model.
[0021] Figure 5 The diagram shown is a three-dimensional structural schematic of the rotating sealing plate of this utility model.
[0022] Explanation of reference numerals in the attached drawings: 1. Hollow grouting anchor body; 2. Connecting grouting anchor body; 3. Butt hole; 4. Centralized pipe; 5. Positioning screw hole; 6. Nut body; 7. Washer body; 8. Connecting pipe; 9. External connection hole; 10. Connecting pipe; 11. Limiting groove; 12. Limiting block; 13. Threaded pipe; 14. Connecting pipe; 15. Installation pipe; 16. First mounting platform; 17. Mounting seat; 18. Second mounting platform; 19. External connection pipe; 20. Connecting groove; 21. Moving plug; 22. Blocking plate; 23. Rotating plate; 24. Connecting rubber plate; 25. Rotating seat; 26. Rotating sealing plate. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0024] Aquifer grouting is a widely used technique in underground engineering construction, primarily used to address problems arising from unfavorable geological conditions in aquifers. In underground engineering projects such as mining, unfavorable geological formations or fault fracture zones often contain numerous joints, pores, and fissures—structures with good water conductivity. Construction disturbances can easily lead to rock mass fracturing and damage, inducing engineering accidents such as water inrush and collapse. Aquifer grouting involves injecting pre-prepared grout into the rock mass requiring grouting. Through processes such as infiltration, diffusion, and solidification, the fractured rock mass is bonded or sealed, thereby improving the stability of the rock mass and ensuring the stable progress of underground engineering projects.
[0025] Implementable methods already discovered in this field,
[0026] I. Vertical segmented grouting: Used for multi-layered aquifers, grouting is carried out segment by segment according to depth. Common methods include: Top-down segmented grouting (downward type): shallow holes are drilled first for grouting, and after the grout solidifies, deeper holes are drilled to continue grouting. This has the advantages of preventing grout seepage and reducing the risk of grout leakage. It is suitable for construction environments such as loose strata or high-pressure aquifers; Bottom-up segmented grouting (upward type): the deepest target layer is drilled first, and after grouting, the grouting pipe is gradually raised to treat the upper layer. This has the advantages of high construction efficiency and suitability for stable strata.
[0027] 2. Horizontal segmented grouting: Applicable to linear projects such as tunnels and roadways, grouting is carried out in segments along the excavation direction: Forward segmented grouting: starting from the working face, grouting is gradually carried forward, which is suitable for fractured zones or water-rich faults; Retreating segmented grouting: drilling is carried out to the farthest end first, and grouting is carried out while retreating, which is suitable for homogeneous strata.
[0028] Among the feasible methods discovered in this field, segmented grouting of aquifers often utilizes grouting anchors: grouting anchors are slender rods that penetrate deep into the soil and rock to control deformation, typically including components such as washers and nuts. Their anchor bodies are generally hollow, with the central hole serving as a high-pressure ventilation and water channel for drilling and a grouting channel. Some grouting anchors consist of reinforcing bars inserted into hollow steel pipes, with grout injected through the pipes to fill the gaps and form an integrated anchor; others consist of a hollow grouting anchor body, alloy drill bit, grout stop plug, vent pipe, support plate, nut, and connecting sleeve, etc.
[0029] The hollow design of the grouting anchor facilitates grouting, enabling it to function as a grouting pipe. This avoids grout loss caused by pulling out grouting pipes in traditional construction processes. It also enables pressure grouting, ensuring full grouting and improving project quality. During the grouting and anchoring process, the anchor maintains good centering, and the grout can completely encapsulate the anchor, effectively preventing corrosion and achieving long-term support. Furthermore, it has built-in threads, eliminating the need for on-site thread processing and facilitating the installation of washers and nuts.
[0030] Grouting anchors must be used strictly according to the construction procedures and with specialized equipment. They also require timely maintenance and monitoring.
[0031] 1. Drilling: Drilling is carried out using drilling equipment such as down-the-hole drills or rotary drills. The hole diameter is 20-30mm larger than the anchor bolt diameter (e.g., a Φ32 anchor bolt requires a Φ50-60mm hole); 2. Anchor Bolt Installation: Ordinary anchor bolts require the insertion of reinforcing bars or hollow anchor bolts, and centering supports may be added if necessary; self-drilling anchor bolts can be drilled directly to the designed depth without the need for retraction; 3. Grouting: Grout types include cement grout (water-cement ratio 0.4-0.6), cement mortar, or chemical grout, and grouting is performed using pressure injection. Grouting is performed using either grout (0.5–2 MPa, ensuring dense filling) or bottom return grouting (the grouting pipe is inserted to the bottom of the hole, and the grout fills from bottom to top); 4. Tensioning and locking (for prestressed anchors only): After the grout strength reaches 70%, tension it to the design load using jacks and lock it with anchors; 5. Curing and testing: Curing time: Cement grout needs 3–7 days to reach the design strength; After curing, testing is performed using pull-out tests (to verify anchoring force) or ultrasonic testing (for grout fullness).
[0032] Grouting anchors are mostly used for initial support and surrounding rock stabilization. They can quickly form initial support, effectively control surrounding rock deformation, ensure surrounding rock stability, and reinforce the surrounding rock. After grouting, not only does it anchor the anchor body, but when the grouting pressure is high, some grout will seep into the cracks in the anchor hole, further reinforcing the surrounding rock. Grouting anchors are mostly used in relatively stable and intact rock formations, and due to the emergence of self-drilling hollow grouting anchors, they can also be used in loose soil and rock conditions. However, they are more suitable for projects requiring higher anchoring strength and better vibration reduction effects.
[0033] In segmented grouting projects of aquifers, the sealing device is a key piece of equipment used to achieve precise isolation of grouting sections, prevent grout cross-layering or leakage, and ensure grouting effect. The core functions of the sealing device are: segmented isolation: separating different grouting sections in the borehole to achieve segmented grouting; pressure sealing: withstanding grouting pressure (usually 0.5 to 3 MPa) to prevent grout from back-leaking; and dynamic adjustment: adapting to different borehole diameters (Φ50 to 150 mm) and formation conditions (such as fractured zones and high-pressure water layers).
[0034] The selection of aquifer segmented grouting sealing devices, as discovered in this field, requires comprehensive design based on geological conditions, grouting pressure, and process type. The mainstream types and characteristics of sealing devices are as follows: 1. Mechanical expansion sealer: The core structure consists of a conical nut, expansion tube, and hexagonal locking assembly. It is mostly used in medium-high pressure grouting (≤5MPa) and has the advantages of convenient installation and reusability. However, it is prone to failure when encountering borehole deformation. 2. Orifice sealing integrated system: The core structure consists of an orifice tube and segmented sealing valves. It is mostly used in deep hole segmented grouting (>50m) and has the advantages of dynamic sealing from top to bottom and adaptability to complex fractures. However, the overall structure is relatively complex, resulting in higher costs. 3. Hydraulic expansion sealer: The core structure consists of a high-pressure rubber tube and a water injection pressurization unit. It is mostly used in coal seam aquifers (low-pressure permeability), with an expansion ratio of 1:1.8, thus enabling rapid borehole sealing. However, its durability is poor.
[0035] Please see Figures 1-5 This utility model provides an embodiment of a sealing device for segmented grouting of aquifers, including a hollow grouting anchor body 1; it also includes a connecting pipe 8 and an installation pipe 15. A connecting grouting anchor body 2 is provided at the upper end of the hollow grouting anchor body 1. A connecting pipe 8 for extending the connecting anchor is provided between the hollow grouting anchor body 1 and the connecting grouting anchor body 2. An installation pipe 15 is provided on the outer side of the connecting pipe 8. The installation pipe 15 is threadedly connected to the hollow grouting anchor body 1 and the connecting grouting anchor body 2. A first mounting platform 16 is fixedly connected to the upper end of the installation pipe 15, and a mounting seat 17 is fixedly connected to the upper end of the first mounting platform 16. A second mounting platform 18 is fixedly connected to the lower end of the installation pipe 15. A rotating plate 23 is rotatably connected to the outer side of the second mounting platform 18. A connecting rubber plate 24 for receiving mortar is installed between the rotating plates 23. A rotating seat 25 is fixed to the lower end of the first mounting platform 16. A rotating sealing plate 26 is rotatably connected to the inner side of the rotating seat 25. Grouting is performed by connecting the hollow grouting anchor body 1 and the connecting grouting anchor body 2 through the connecting pipe 8. Grouting is performed by connecting the connecting pipe 8 in conjunction with the mounting pipe 15. At the same time, the rotating plate 23 and the connecting rubber plate 24 receive the mortar, and then the rotating plate 23 and the connecting rubber plate 24 are unfolded to contact the hole wall to achieve a sealing effect. At the same time, the mortar received gradually increases, which pushes the rotating sealing plate 26 to further seal the hole wall.
[0036] Please see Figures 2-3In this embodiment, both the hollow grouting anchor body 1 and the connecting grouting anchor body 2 have mating holes 3 on their inner sides. A central pipe 4 is fixedly connected to the outer side of the mating hole 3. A positioning screw hole 5 is opened on the inner side of the central pipe 4. The connecting pipe 8 is installed through the mating hole 3 and the positioning screw hole 5, and the central pipe 4 facilitates the flow of mortar. The outer side of the connecting grouting anchor body 2 is threadedly connected to a nut body 6. A pad body 7 is installed at the lower end of the nut body 6. The pad body 7 is bolted to the mounting base 17. The pad body 7 is installed through the nut body 6 to block excess mortar. An external connection hole 9 is opened on the outer side of the connecting pipe 8. Both the upper and lower ends of the connecting pipe 8 are fixedly connected to the connecting pipe 10. Mortar is discharged through the external connection hole 9, thereby improving the overall grouting efficiency.
[0037] Please see Figures 3-5 In this embodiment, the connecting pipe 8 is slidably connected to the hollow grouting anchor body 1 and the connecting grouting anchor body 2 through the docking hole 3. A limiting groove 11 is formed on the inner side of the connecting pipe 8. The connecting pipe 10 is used to quickly position the connecting pipe 8 by cooperating with the docking hole 3. A limiting block 12 is slidably connected to the inner side of the limiting groove 11. A threaded pipe 13 is fixedly connected to the outer side of the limiting block 12. The threaded pipe 13 is threadedly connected to the central pipe 4 through the positioning screw hole 5. A connecting pipe 14 is fixedly connected to the outer side of the threaded pipe 13. The connecting pipe 14 is slidably connected to the connecting pipe 8. The limiting block 12, the threaded pipe 13 and the connecting pipe 14 are moved by the limiting groove 11, thereby rotating the connecting pipe 8 to drive the limiting block 12 and the threaded pipe 13 to rotate, thereby making the limiting block 12... The threaded pipe 13 is connected to the central pipe 4 and the positioning screw hole 5, thereby fixing the connecting pipe 8 and forming a grouting channel with the connecting pipe 14. An external pipe 19 is fixed to the outside of the installation pipe 15. A connecting groove 20 is opened on the inside of the external pipe 19. The mortar is discharged through the external pipe 19 and the connecting groove 20 in conjunction with the connecting pipe 8 and the external connection hole 9. A movable plug 21 is slidably connected to the inside of the connecting groove 20. A baffle plate 22 is installed on the outside of the movable plug 21. The baffle plate 22 is slidably connected to the external pipe 19. The movable plug 21 and the baffle plate 22 are pushed by the mortar, thereby facilitating the normal discharge of mortar. After a large amount of mortar accumulates between the connecting rubber plate 24 and the rotating sealing plate 26, the pressure increases and pushes the movable plug 21 and the baffle plate 22 to reset.
[0038] During installation, firstly, the connecting pipe 8 is quickly positioned by engaging the connecting pipe 10 with the docking hole 3. Then, by rotating the connecting pipe 8 and the limiting groove 11, the limiting block 12 and the threaded pipe 13 are rotated, thereby connecting the limiting block 12 and the threaded pipe 13 to the central pipe 4 and the positioning screw hole 5. Next, the connecting pipe 8 and the installation pipe 15 are installed through the hollow grouting anchor body 1 and the connecting grouting anchor body 2. Finally, the nut body 6 and the washer body 7 are installed and connected to the mounting base 17. Then, the connecting pipe 8 is installed through the docking hole 3 and the positioning screw hole 5, and the central pipe 4 is used to facilitate mortar flow. Next, the washer body 7 is installed through the nut body 6 to block excess mortar. Finally, the mortar is discharged through the external connection hole 9, thereby improving the overall grouting efficiency.
[0039] In use, grouting is performed by connecting the hollow grouting anchor body 1 and the connecting grouting anchor body 2 through the connecting pipe 8, and grouting is also performed through the connecting pipe 8 in conjunction with the installation pipe 15. Then, mortar is discharged through the external pipe 19 and the connecting groove 20 in conjunction with the connecting pipe 8 and the external connection hole 9. The mortar pushes the moving plug 21 and the blocking plate 22 to facilitate normal discharge of mortar. Then, the rotating plate 23 and the connecting rubber plate 24 receive the mortar, and then the rotating plate 23 and the connecting rubber plate 24 are unfolded to contact the hole wall to achieve a sealing effect. At the same time, the received mortar gradually increases, which pushes the rotating sealing plate 26 to further seal the hole wall. Finally, after a large amount of mortar has accumulated between the connecting rubber plate 24 and the rotating sealing plate 26, the pressure increases and pushes the moving plug 21 and the blocking plate 22 to reset, so that the rotating plate 23, the connecting rubber plate 24 and the rotating sealing plate 26 seal the hole wall.
[0040] Through the above steps, grouting is performed by connecting the hollow grouting anchor body 1 and the connecting grouting anchor body 2 through the connecting pipe 8. The rotating plate 23 and the connecting rubber plate 24 receive the mortar, and then the rotating plate 23 and the connecting rubber plate 24 are unfolded to contact the hole wall to achieve a sealing effect. At the same time, the mortar received gradually increases, which in turn pushes the rotating sealing plate 26 to further seal the hole wall. During the recovery, the rotating plate 23 and the connecting rubber plate 24 have less contact with the sealing mortar, and the rotating sealing plate 26 can freely reset for easy recovery. This solves the problem that in the existing sealing devices for segmented grouting of aquifers, the single-layer sealing structure mostly relies on the overall shape change to support the sealing gap. This change has a close contact with the mortar, which increases the difficulty of movement and recovery, and leads to the increase in the use cost of the sealing device for segmented grouting of aquifers.
Claims
1. A sealing device for segmented grouting of an aquifer, comprising a hollow grouting anchor body (1); characterized in that: It also includes a connecting pipe (8) and an installation pipe (15). The upper end of the hollow grouting anchor body (1) is provided with a connecting grouting anchor body (2). A connecting pipe (8) for extending the connecting anchor is provided between the hollow grouting anchor body (1) and the connecting grouting anchor body (2). An installation pipe (15) is provided on the outside of the connecting pipe (8). The installation pipe (15) is threadedly connected to the hollow grouting anchor body (1) and the connecting grouting anchor body (2). The upper end of the installation pipe (15) is fixedly connected to... There is a first mounting platform (16), the upper end of the first mounting platform (16) is fixedly connected to a mounting seat (17), the lower end of the mounting tube (15) is fixedly connected to a second mounting platform (18), the outer side of the second mounting platform (18) is rotatably connected to a rotating plate (23), a connecting rubber plate (24) for receiving mortar is installed between the rotating plates (23), the lower end of the first mounting platform (16) is fixedly connected to a rotating seat (25), and the inner side of the rotating seat (25) is rotatably connected to a rotating sealing plate (26).
2. The sealing device for segmented grouting of an aquifer according to claim 1, characterized in that: The hollow grouting anchor body (1) and the connecting grouting anchor body (2) are both provided with a butt hole (3). A central pipe (4) is fixed to the outside of the butt hole (3). A positioning screw hole (5) is provided on the inside of the central pipe (4).
3. A sealing device for segmented grouting of an aquifer according to claim 2, characterized in that: The outer side of the grouting anchor body (2) is threaded with a nut body (6), and a pad body (7) is installed at the lower end of the nut body (6). The pad body (7) is bolted to the mounting base (17).
4. A sealing device for segmented grouting of an aquifer according to claim 1, characterized in that: An external connection hole (9) is provided on the outside of the connecting pipe (8), and a connecting pipe (10) is fixedly connected to both the upper and lower ends of the connecting pipe (8).
5. A sealing device for segmented grouting of an aquifer according to claim 4, characterized in that: The connecting pipe (8) is slidably connected to the hollow grouting anchor body (1) and the connecting grouting anchor body (2) through the docking hole (3), and a limit groove (11) is opened on the inner side of the connecting pipe (8).
6. A sealing device for segmented grouting of an aquifer according to claim 5, characterized in that: A limiting block (12) is slidably connected to the inner side of the limiting groove (11), and a threaded pipe (13) is fixedly connected to the outer side of the limiting block (12). The threaded pipe (13) and the central pipe (4) are threadedly connected through the positioning screw hole (5). A connecting pipe (14) is fixedly connected to the outer side of the threaded pipe (13), and the connecting pipe (14) and the connecting pipe (8) are slidably connected.
7. A sealing device for segmented grouting of an aquifer according to claim 1, characterized in that: An external pipe (19) is fixed to the outside of the mounting pipe (15), and a connecting groove (20) is provided on the inside of the external pipe (19).
8. A sealing device for segmented grouting of an aquifer according to claim 6, characterized in that: A movable plug (21) is slidably connected to the inner side of the connecting groove (20), and a baffle plate (22) is installed on the outer side of the movable plug (21). The baffle plate (22) is slidably connected to the outer pipe (19).