Tunnel karst area grouting and filling device

Abstract

A tunnel karst area grouting filling device relates to the technical field of tunnel construction and comprises a grouting pipe, a grouting hole, a grouting hole sealing assembly, a three-way connector, a pressure relief bag and a switch valve. A grouting pipe is inserted into the grouting drill hole, and a plurality of grouting holes are formed in a pipe body; the grouting hole sealing assembly can automatically seal a gap between a grouting pipe and a drilling hole opening, and grout leakage is prevented; the three-way connector is connected with the grouting hole sealing assembly and the grouting pump, the pressure relief bag and the switch valve are used for reducing the pipeline pressure after grouting is completed, and dismounting is convenient. The device is simple in structure and convenient to assemble and maintain; grout backflow is avoided through an automatic plugging function, leakage is effectively prevented through an annular mounting disc and a conical sealing gasket, and grouting stability is ensured through a limiting support and a guide rod; the pressure relief bag and the switch valve reduce the pipeline pressure and facilitate pipeline disassembly; the conical guide head and the elastic ring sleeve optimize the inserting efficiency and stability of the grouting pipe, and efficient grout conveying is achieved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a grouting and filling device for karst areas in tunnels. Background Technology

[0002] During tunnel construction, especially when traversing karst areas, grouting is a crucial means to ensure construction safety and structural stability. Karst areas typically contain caves, fissures, and loose filling materials. These geological conditions can lead to problems such as insufficient foundation bearing capacity, localized collapse, and uneven settlement during tunnel construction. While traditional grouting techniques can improve the mechanical properties of the strata to some extent, their application in karst areas still has some limitations, such as complex grouting processes, low construction efficiency, and difficulty in guaranteeing grouting effectiveness.

[0003] Furthermore, existing technologies for grouting devices have shortcomings in design. For example, problems such as grout leakage and grout pipe blockage can easily occur during the grouting process, leading to poor grouting results and increased construction costs. Therefore, developing an efficient and reliable grouting and filling device for karst areas in tunnels is of great significance for improving construction efficiency, ensuring construction safety, and reducing construction costs. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model discloses a grouting and filling device for karst areas in tunnels.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A grouting and filling device for karst areas in tunnels includes a grouting pipe, the pipe body of which can be inserted into a grouting borehole;

[0007] Grouting holes, multiple grouting holes are located in the grouting pipe body;

[0008] The grouting and sealing assembly is connected to one end of the grouting pipe and is used to seal the gap between the grouting pipe body and the grouting borehole opening, and automatically seals the grouting pipe after grouting is completed.

[0009] The three-way connector has a first interface that is connected to the grouting sealing assembly and a third interface that is connected to the grouting pump via a pipe.

[0010] Pressure relief bag, wherein the pressure relief bag is installed at the second interface of the tee connector;

[0011] A switching valve is installed between the pressure relief bag and the tee connector.

[0012] Preferably, the grouting and sealing assembly includes:

[0013] The first conical sleeve has a small end that is connected to the grouting pipe; the conical surface of the first conical sleeve seals the gap between the grouting pipe body and the grouting borehole opening.

[0014] An annular mounting plate is located at the large end of the first conical sleeve, and the surface of the annular mounting plate is provided with a plurality of mounting holes spaced apart along the circumferential direction.

[0015] The second conical sleeve has its large end connected to the large end of the first conical sleeve, and its small end connected to the first interface of the tee connector.

[0016] A conical sealing disc is disposed in the cavity between the first conical sleeve and the second conical sleeve, with the small end of the conical sealing disc facing the second conical sleeve, and is used to seal the opening of the second conical sleeve after grouting is completed;

[0017] Guide rods, multiple guide rods are arranged circumferentially along the conical sealing disc, one end of the guide rod extends into the small end hole of the first conical sleeve and slides in contact with the small end hole wall of the first conical sleeve;

[0018] Limiting brackets, multiple limiting brackets are arranged circumferentially at intervals along the large end of the conical sealing disc, to maintain a distance between the conical sealing disc and the inner wall of the first conical sleeve.

[0019] Preferably, the grouting and sealing assembly further includes:

[0020] A spring, which is sleeved on the outside of multiple guide rods, is used to automatically seal the orifice of the second conical sleeve with a conical sealing disc.

[0021] Preferably, the first conical sleeve is provided with a conical sealing gasket.

[0022] Preferably, the end of the limiting bracket away from the conical sealing disc is provided with a ring.

[0023] Preferably, a pressure gauge is installed between the switching valve and the second interface of the tee connector.

[0024] Preferably, a tapered guide head is movably inserted into one end of the grouting pipe away from the grouting sealing assembly.

[0025] Preferably, an elastic ring is provided between the tapered guide head and the inner wall of the grouting pipe.

[0026] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0027] (1) The present invention has a simple structure. The grouting and sealing assembly adopts a split design, which is convenient for assembly and maintenance. At the same time, the conical sealing plate can automatically seal the grouting pipe after grouting to prevent grout backflow.

[0028] (2) The annular mounting plate and conical sealing gasket design of the grouting sealing assembly of this utility model can effectively seal the gap between the grouting pipe and the grouting borehole opening, preventing grout leakage. At the same time, the design of the limiting bracket and guide rod ensures the stability of the grouting process and avoids the grouting pipe from accidentally coming out during the grouting and pressurization process.

[0029] (3) The present invention is further equipped with a pressure relief bag and a switch valve, which can effectively reduce the pressure in the pipeline after grouting is completed, thereby facilitating the disassembly of the pipeline connected to the grouting pump.

[0030] (4) With the assistance of the spring, the conical sealing disc can quickly complete the sealing after the grouting is completed, which reduces the waiting time and manual intervention during the grouting process and further improves the reliability of automatic sealing.

[0031] (5) The present invention further adds a conical guide head and an elastic ring to the end of the grouting pipe. The design of the conical guide head provides an effective guiding function for the insertion of the grouting pipe into the grouting borehole. During the grouting operation, the conical guide head can automatically fall off under the pushing action of the grout in the grouting pipe, which can achieve more efficient grout delivery. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the grouting and sealing assembly.

[0034] Figure 3 This is a schematic diagram of the internal structure of the grouting and sealing assembly;

[0035] Figure 4 This is a schematic diagram of the structure of a conical sealing disc;

[0036] Figure 5 This is a schematic diagram of the connection structure between the conical guide head and the grouting pipe.

[0037] In the diagram: 1. Grouting pipe; 2. Grouting hole; 3. Grouting sealing assembly; 3-1. First conical sleeve; 3-2. Annular mounting plate; 3-3. Second conical sleeve; 3-4. Conical sealing plate; 3-5. Guide rod; 3-6. Limiting bracket; 3-7. Spring; 3-8. Ring sleeve; 4. T-joint; 5. Pressure relief bag; 6. Switch valve; 7. Pressure gauge; 8. Conical guide head; 9. Elastic ring sleeve. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Example 1

[0041] Combined with appendix Figures 1-4 A grouting and filling device for karst areas in tunnels includes a grouting pipe 1, a grouting sealing assembly 3, a tee connector 4, and a pressure relief bag 5. The grouting pipe 1 has multiple grouting holes 2 evenly distributed throughout its body to ensure uniform diffusion of grout within the grouting borehole. The grouting pipe 1 can be inserted into the grouting borehole, and grout is injected into the borehole through the grouting holes 2, thereby achieving effective filling of the karst area.

[0042] To ensure the sealing and safety of the grouting process, a grouting sealing assembly 3 is installed at one end of the grouting pipe 1. The main function of the grouting sealing assembly 3 is to seal the gap between the grouting pipe 1 and the grouting borehole opening, preventing grout from leaking out of the gap. Simultaneously, after grouting is completed, the grouting sealing assembly 3 can automatically seal the grouting pipe 1, preventing grout from leaking out of the grouting pipe 1 and ensuring a clean and safe construction environment.

[0043] Combined with appendix Figures 2-4The specific structural design of the grouting sealing assembly 3 is as follows: It includes a first conical sleeve 3-1, the small end of which is connected to the grouting pipe 1. The conical surface of the first conical sleeve 3-1 can tightly fit the opening of the grouting borehole, thereby effectively sealing the gap between the grouting pipe 1 and the opening of the grouting borehole. To further enhance the sealing effect, a conical sealing gasket (not shown in the figure) is also fitted on the outside of the first conical sleeve 3-1. This design not only improves the sealing performance but also effectively prevents grout from seeping out of the gap during the grouting process.

[0044] The large end of the first conical sleeve 3-1 is equipped with an annular mounting plate 3-2, and the surface of the annular mounting plate 3-2 has multiple mounting holes spaced circumferentially. In actual construction, by installing expansion bolts in these mounting holes, the first conical sleeve 3-1 can be firmly fixed at the opening of the grouting borehole. This fixing method not only ensures the stability of the grouting sealing assembly 3, but also effectively prevents the grouting pipe 1 from accidentally coming off during the grouting and pressurization process, thus ensuring the smooth progress of the grouting operation.

[0045] In addition, the grouting and sealing assembly 3 also includes a second conical sleeve 3-3, the large end of which is connected to the large end of the first conical sleeve 3-1. A conical sealing disc 3-4 is provided in the cavity between the first conical sleeve 3-1 and the second conical sleeve 3-3. The small end of the conical sealing disc 3-4 faces the second conical sleeve 3-3, and its main function is to seal the orifice of the second conical sleeve 3-3 after grouting. This design effectively prevents grout from flowing back from the grouting pipe 1 after grouting, thereby ensuring the grouting effect.

[0046] The conical sealing disc 3-4 is provided with multiple guide rods 3-5 spaced at intervals along its circumference, with no fewer than three guide rods 3-5. One end of each guide rod 3-5 extends into the small end orifice of the first conical sleeve 3-1 and slides in contact with the wall of the small end orifice of the first conical sleeve 3-1. The main function of the guide rods 3-5 is to guide the conical sealing disc 3-4, ensuring that it can only move axially in the grouting sealing assembly 3, thereby ensuring the accuracy and reliability of the sealing action.

[0047] Multiple limiting brackets 3-6 are spaced circumferentially at the large end of the conical sealing disc 3-4. These limiting brackets 3-6 maintain a certain distance between the conical sealing disc 3-4 and the inner wall of the first conical sleeve 3-1. This design effectively prevents the conical sealing disc 3-4 from fitting against the inner wall of the first conical sleeve 3-1 during grouting operations, thus preventing the first conical sleeve 3-1 from becoming blocked and ensuring that the grouting pipe 1 can perform grouting operations normally.

[0048] Furthermore, the end of the limiting bracket 3-6 opposite to the conical sealing disc 3-4 is provided with a ring 3-8. The ring 3-8 can effectively enhance the structural strength of the limiting bracket 3-6 and prevent the limiting bracket 3-6 from bending accidentally due to excessive grouting pressure.

[0049] It is worth noting that the diameter of the conical sealing disc 3-4 is larger than the orifice diameter of the second conical sleeve 3-3, but much smaller than the diameter of the large end of the first conical sleeve 3-1 and the second conical sleeve 3-3. This size design can meet the needs of high-flow grouting operations and improve grouting efficiency. At the same time, the axial length of the grouting sealing assembly 3 is relatively short, avoiding interference with subsequent construction after the grouting operation is completed, and improving the flexibility and convenience of construction.

[0050] The grouting and sealing assembly 3 is detachably connected to the tee connector 4. The first port of the tee connector 4 is connected to the second conical sleeve 3-3, and the third port is connected to the grouting pump via a pipe. The grouting pump is a mature existing product, and its structure and working principle will not be described in detail here. A pressure relief bag 5 is detachably connected to the second port of the tee connector 4, and a switch valve 6 is installed between the pressure relief bag 5 and the tee connector 4. During the grouting operation, the switch valve 6 is in the closed state to ensure stable grouting pressure. After grouting is completed, the grouting pump is first turned off, and then the switch valve 6 is opened to release the grout in the grouting pump pipe and the tee connector 4 into the pressure relief bag 5. This process not only effectively reduces the pressure in the pipe, but also avoids grout leakage and environmental pollution. After depressurization, the tee connector 4 can be easily removed for use in the next grouting borehole.

[0051] Furthermore, a pressure gauge 7 is installed between the switching valve 6 and the second interface of the tee connector 4. The pressure gauge 7 allows for monitoring of the grouting pressure. Simultaneously, after grouting is completed, the pressure value on the pressure gauge 7 can be used to determine whether the grouting sealing assembly 3 automatically seals the grouting pipe 1. Example 2

[0052] Combined with appendix Figures 1-4 A grouting and filling device for karst areas in tunnels is disclosed. The difference between this device and Embodiment 1 lies in the improved structural design of the grouting sealing assembly 3. Specifically, a spring 3-7 is added to the grouting sealing assembly 3. The spring 3-7 is sleeved on the outside of multiple guide rods 3-5. Its main function is to push the conical sealing disc 3-4 with its own elastic restoring force after grouting, automatically sealing the orifice of the second conical sleeve 3-3. This improvement not only further enhances the reliability of the sealing but also reduces manual intervention and improves construction efficiency.

[0053] During grouting, grout is injected into the karst area through grouting pipe 1 and grouting hole 2. At this time, the conical sealing disc 3-4 remains open under the pressure of the grout, ensuring that the grout can smoothly pass through the second conical sleeve 3-3 into the grouting borehole. When the grouting operation is completed and the grout pressure gradually decreases, the elastic force of spring 3-7 begins to exert its effect, pushing the conical sealing disc 3-4 towards the opening of the second conical sleeve 3-3, ultimately achieving automatic sealing. This automatic sealing mechanism effectively prevents grout backflow after grouting, avoiding construction safety hazards and resource waste caused by grout leakage. Example 3

[0054] Combined with appendix Figure 1 and 5 A grouting and filling device for karst areas in tunnels is disclosed, further optimizing the grouting pipe 1 in Embodiment 1 or 2, focusing on improving the insertion efficiency of the grouting pipe 1 and the stability of the grouting process. Compared with Embodiment 1 or 2, the structural design of the grouting pipe 1 has been improved. Specifically, a tapered guide head 8 is movably inserted at the end of the grouting pipe 1 facing away from the grouting sealing assembly 3. The tapered guide head 8 is designed to provide guidance for the insertion of the grouting pipe 1 into the grouting borehole, ensuring that the grouting pipe 1 can smoothly and accurately enter the grouting borehole. This improvement significantly increases the insertion efficiency of the grouting pipe 1 and reduces construction delays caused by insertion difficulties.

[0055] During the grouting operation, the conical guide head 8 can detach from the grouting pipe 1 under the pushing action of the grout inside the grouting pipe 1. This design utilizes the pressure of the grout to allow the conical guide head 8 to automatically detach after completing its guiding task, thereby accelerating the grouting process and improving grouting efficiency.

[0056] Furthermore, to ensure the stability of the conical guide head 8 during the insertion of the grouting pipe 1 into the grouting borehole, an elastic ring 9 is added between the conical guide head 8 and the inner wall of the grouting pipe 1. The main function of the elastic ring 9 is to increase the damping force between the conical guide head 8 and the inner wall of the grouting pipe 1, preventing the conical guide head 8 from accidentally falling off due to external forces during the insertion of the grouting pipe 1. This design, while ensuring the stability of the guide head, also addresses the need for automatic detachment during the grouting process, further optimizing the overall usability.

[0057] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A grouting and filling device for karst areas in tunnels, characterized in that, include: Grouting pipe (1), the body of which can be inserted into the grouting borehole; Grouting holes (2), multiple grouting holes (2) are provided on the body of the grouting pipe (1); Grouting sealing assembly (3) is connected to one end of grouting pipe (1) to seal the gap between the pipe body of grouting pipe (1) and the grouting borehole opening, and automatically seals grouting pipe (1) after grouting is completed. The first interface of the three-way connector (4) is connected to the grouting sealing assembly (3), and the third interface is connected to the grouting pump through a pipe. Pressure relief bag (5), the pressure relief bag (5) is installed at the second interface of the tee connector (4); A switching valve (6) is installed between the pressure relief bag (5) and the three-way connector (4).

2. The grouting and filling device for karst areas in tunnels as described in claim 1, characterized in that, The grouting and sealing assembly (3) includes: The first conical sleeve (3-1) has a small end that is connected to the grouting pipe (1); the conical surface of the first conical sleeve (3-1) seals the gap between the grouting pipe (1) and the grouting borehole opening. An annular mounting plate (3-2) is provided at the large end of the first conical sleeve (3-1), and the surface of the annular mounting plate (3-2) is provided with a plurality of mounting holes at intervals along the circumferential direction; The second conical sleeve (3-3) has its large end connected to the large end of the first conical sleeve (3-1), and its small end connected to the first interface of the tee connector (4). A conical sealing disc (3-4) is provided in the cavity between the first conical sleeve (3-1) and the second conical sleeve (3-3), with the small end of the conical sealing disc (3-4) facing the second conical sleeve (3-3), and is used to seal the orifice of the second conical sleeve (3-3) after grouting is completed; Guide rods (3-5), multiple guide rods (3-5) are arranged circumferentially along the conical sealing disc (3-4). One end of the guide rod (3-5) extends into the small end hole of the first conical sleeve (3-1) and slides in contact with the small end hole wall of the first conical sleeve (3-1). Limiting brackets (3-6), multiple limiting brackets (3-6) are arranged circumferentially at intervals along the large end of the conical sealing disc (3-4) to maintain a distance between the conical sealing disc (3-4) and the inner wall of the first conical sleeve (3-1).

3. The grouting and filling device for karst areas in tunnels as described in claim 2, characterized in that: The grouting and sealing assembly (3) also includes: A spring (3-7) is sleeved on the outside of multiple guide rods (3-5) to enable the conical sealing disc (3-4) to automatically seal the orifice of the second conical sleeve (3-3).

4. The grouting and filling device for karst areas in tunnels as described in claim 2, characterized in that: The limiting bracket (3-6) has a ring (3-8) at the end opposite to the conical sealing disc (3-4).

5. The grouting and filling device for karst areas in tunnels as described in claim 1, characterized in that: A pressure gauge (7) is installed between the switching valve (6) and the second port of the three-way connector (4).

6. The grouting and filling device for karst areas in tunnels as described in claim 1, characterized in that: A tapered guide head (8) is movably inserted into one end of the grouting pipe (1) away from the grouting sealing assembly (3).

7. The grouting and filling device for karst areas in tunnels as described in claim 6, characterized in that: An elastic ring (9) is provided between the conical guide head (8) and the inner wall of the grouting pipe (1).

8. The grouting and filling device for karst areas in tunnels as described in claim 1, characterized in that: The grouting sealing assembly (3) is detachably connected to the grouting pipe (1).

Images