Large-diameter shield synchronous double-liquid grouting slurry ground preparation system

Abstract

The utility model relates to the field of tunnel and underground engineering shield synchronous double-liquid slurry preparation, in particular to a large-diameter shield synchronous double-liquid grouting slurry ground preparation system. The problem that position adjustment or turnover on site is very inconvenient is solved, modular design is adopted, equipment circulation and secondary utilization are facilitated, resource waste and carbon emission are reduced to a certain degree, the greening level of shield construction is improved, and the device comprises an A liquid slurrying system, a bentonite slurrying system and a temporary slurry storage system; the A liquid pulping system comprises a first movable bottom frame, an A liquid pulping machine is arranged on the first movable bottom frame, and a plurality of rows of roller groups are arranged at the bottoms of the first movable bottom frame and the second movable bottom frame; when preparation operation is carried out, the first movable bottom frame and the second movable bottom frame are sequentially connected into a whole, and the A liquid pulping system, the bentonite pulping system and the temporary slurry storage system are communicated through hoses.

Description

Technical Field

[0001] This utility model relates to the field of synchronous dual-liquid grout preparation for tunnel and underground engineering shield tunnels, and in particular to a ground preparation system for synchronous dual-liquid grouting for large-diameter shield tunnels. Background Technology

[0002] In shield tunnel construction, synchronous grouting is a crucial process, primarily aimed at promptly filling the annular gaps between the tunnel segments and the ground during tunnel boring machine (TBM) excavation. Specifically, synchronous grouting quickly fills these gaps, preventing significant deformation or collapse of the ground due to these gaps, thus effectively controlling surface settlement. Simultaneous grouting ensures a stable interaction force between the tunnel segments and the surrounding rock, preventing segment displacement and guaranteeing the stability and safety of the tunnel structure. Furthermore, effective synchronous grouting prevents groundwater from flowing into the soil chamber through unfilled gaps, preventing water seepage. Finally, the solidified grouting material exhibits good impermeability, which not only improves the overall waterproofing of the tunnel but also extends its service life, ensuring the structural safety and reliability of the tunnel. In conclusion, the application of synchronous grouting technology is of great significance for controlling surface settlement, maintaining segment stability, and ensuring the long-term safe operation of the tunnel structure during tunnel construction.

[0003] Two-component grouts offer significant advantages over single-component grouts, but also have some drawbacks. Two-component grouts have a shorter setting time and higher initial strength, which is beneficial for rapidly stabilizing the formation. Furthermore, by adjusting the ratio of A and B components, the setting time and strength of the grout can be flexibly controlled, leading to its widespread application, especially in water-rich environments and soft soil layers. However, the preparation and injection process of two-component grouts is relatively complex, requiring strict control of the mixing ratio of A and B components and the timing of injection, making the process relatively complicated. In addition, due to the rapid setting of two-component grouts, if the grouting pipeline is not cleaned in a timely manner or the grouting parameters are set improperly, pipeline blockage can easily occur. Therefore, to achieve efficient and precise construction of shield tunneling with simultaneous two-component grout injection, the quality of raw materials, mixing ratio, and mixing process of A and B components must be strictly controlled during the preparation of the two-component grout to ensure that the workability of the grout meets the requirements of on-site construction. Therefore, it is necessary to prepare liquid A on-site, and then use it in conjunction with liquid B for grouting. The ground grouting system includes a liquid A grouting system, a bentonite grouting system, and a temporary grout storage system. It has a large volume and mass, especially with multiple grouting machines. The machines are heavy and make it very inconvenient to adjust their position or move them around on-site. Utility Model Content

[0004] This invention provides a ground preparation system for synchronous dual-liquid grouting in large-diameter shield tunnels, which solves the problem of inconvenience when adjusting the position or turning the equipment around on site. It adopts a modular design, which facilitates equipment transfer and reuse, reduces resource waste and carbon emissions to a certain extent, and improves the green level of shield tunneling construction.

[0005] This utility model is achieved through the following solution:

[0006] A ground preparation system for synchronous dual-liquid grouting in large-diameter shield tunnels includes an A-liquid grouting system, a bentonite grouting system, and a temporary grout storage system;

[0007] The A-liquid slurry preparation system includes an A-liquid slurry preparation machine and a cement silo, and a first movable base frame is installed at the bottom of the A-liquid slurry preparation machine;

[0008] The bentonite pulping system includes a bentonite pulping machine and a bentonite silo, and a second movable base is installed at the bottom of the bentonite pulping machine.

[0009] The temporary slurry storage system includes a temporary slurry storage container for liquid A, a temporary slurry storage container for liquid B, and a clean water tank.

[0010] The bottom of the first and second movable base frames is provided with multiple rows of rollers;

[0011] During the preparation operation, the first and second mobile base frames are connected in sequence to form a whole, and the A-liquid slurry preparation system, the bentonite slurry preparation system and the temporary slurry storage system are connected by hoses.

[0012] Furthermore, the first mobile base is also equipped with a stabilizer storage tank, which is connected to the A-liquid pulping machine via a hose pump and hose.

[0013] Furthermore, the first and second movable base frames are welded from steel beams. The left and right sides of the first and second movable base frames are provided with docking supports, and the docking supports are provided with pin holes. When the docking supports of the left and right sides of the first and second movable base frames are spliced ​​together, a fixed connection is achieved by passing a pin through the pin hole.

[0014] Furthermore, there are four cement silos, two bentonite silos, and two clean water tanks;

[0015] There are four sets of A-liquid pulping machines and two sets of bentonite pulping machines.

[0016] Furthermore, the temporary storage container for liquid A consists of two 17m³ temporary storage and mixing tanks.

[0017] The beneficial effects achieved by this utility model compared with the prior art are as follows:

[0018] 1. The large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system of this utility model consists of three modules: an A-liquid slurry preparation system, a bentonite slurry preparation system, and a temporary slurry storage system. All A-liquid slurry preparation machines are equipped with a first movable base frame at their bottom, and all bentonite slurry preparation machines are equipped with a second movable base frame at their bottom. The bottoms of the first and second movable base frames are equipped with multiple rows of rollers. During preparation operations, the first and second movable base frames are sequentially connected as a single unit. The A-liquid slurry preparation system, the bentonite slurry preparation system, and the temporary slurry storage system are connected via flexible hoses. When on-site adjustments are required, each module can be moved accordingly, facilitating both preparation and relocation.

[0019] 2. This utility model adopts a modular design, which facilitates equipment transfer and secondary use, reduces resource waste and carbon emissions to a certain extent, and improves the green level of shield tunneling construction;

[0020] 3. When the left and right side supports of the first and second movable base frames are spliced ​​together, a fixed connection is achieved by passing a pin through the pin hole, which facilitates the connection and disassembly of each module and improves the flexibility of use.

[0021] 4. The temporary storage containers for liquid A are two 17m³ temporary storage mixing tanks, which facilitate the temporary storage of prepared liquid A and prevent sedimentation.

[0022] 5. The large-diameter shield tunneling synchronous dual-liquid grouting slurry ground preparation system of this utility model consists of three modules: an A-liquid slurry preparation system, a bentonite slurry preparation system, and a temporary slurry storage system. Adopting a modular design and utilizing an automated control system, it achieves precise proportioning and continuous supply of the dual-liquid slurry, ensuring the quality of synchronous grouting during the tunneling process. Simultaneously, the system has a compact design and small footprint, making it suitable for use in confined urban spaces. The large-diameter shield tunneling synchronous dual-liquid grouting slurry ground preparation method provided by this utility model optimizes the preparation process, improves transportation efficiency, and reduces ground preparation costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the ground preparation system for synchronous dual-liquid grouting of large-diameter shield tunnels according to the present invention;

[0024] Figure 2 This is a schematic diagram of the first movable base frame of this utility model;

[0025] Figure 3 This is a flowchart illustrating the preparation process of the large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system described in this utility model.

[0026] In the diagram: 1. First movable base frame, 2. Second movable base frame, 3. Clean water tank, 4. Roller assembly, 5. Connecting support, 6. Pin shaft, 7. A-liquid pulping machine, 8. Cement silo, 9. Stabilizer storage tank, 10. Bentonite pulping machine, 11. Bentonite silo, 12. Temporary A-liquid storage container, 13. Temporary B-liquid storage container. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying 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 the utility model.

[0029] like Figure 1 As shown in the figure, this embodiment discloses a ground preparation system for synchronous dual-liquid grouting of large-diameter shield tunnels, which mainly includes three modules: an A-liquid grouting system, a bentonite grouting system, and a temporary grout storage system.

[0030] In this embodiment, to facilitate turnover or temporary position adjustment, the A-liquid slurry preparation system and the bentonite slurry preparation system respectively include a first movable base frame 1 and a second movable base frame 2, as follows: Figure 2 As shown, the first movable base frame 1 and the second movable base frame 2 are welded from steel beams, and multiple rows of roller sets 4 are installed at the bottom of the first movable base frame 1 and the second movable base frame 2. The roller sets 4 can be high-load-bearing rollers commonly used in the shield tunneling field, as this is a conventional technical method and will not be described in detail here. Abutment supports 5 are welded to the left and right sides of the first movable base frame 1 and the second movable base frame 2. Pin holes are pre-drilled on the abutment supports 5. When the abutment supports 5 on the left and right sides of the first movable base frame 1 and the second movable base frame 2 are spliced, a fixed connection is achieved by a pin 6 passing through the pin holes.

[0031] In this embodiment, the A-liquid slurry preparation system includes four A-liquid slurry preparation machines 7, four cement silos 8, and one stabilizer storage tank 9. This enables the shield tunneling synchronous dual-liquid slurry ground preparation system to have a maximum A-liquid slurry preparation capacity of 12 × 4 = 48 m³ / h. The cement silos 8 are connected to their corresponding A-liquid slurry preparation machines 7, and the stabilizer storage tank 9 is connected to each A-liquid slurry preparation machine 7 via a hose pump and hoses. The four A-liquid slurry preparation machines 7 and the stabilizer storage tank 9 are integrated and fixed to the first movable base frame 1 for easy adjustment and relocation.

[0032] The bentonite pulping system includes two bentonite pulping machines 10 and two sets of 100t bentonite silos 11. Each bentonite pulping machine 10 is connected to its corresponding bentonite silo 11, so that the total bentonite pulping capacity is 44m³ / h. The two bentonite pulping machines 10 are installed together on the second mobile base frame 2.

[0033] The temporary slurry storage system includes a temporary slurry storage container 12 for liquid A, a temporary slurry storage container 13 for liquid B, and a clear water tank 14. The temporary slurry storage container 12 for liquid A consists of two 17m³ temporary slurry mixing tanks, each containing a stirrer to prevent sedimentation of liquid A. The temporary slurry storage container 13 for liquid B consists of five 20m³ liquid B storage tanks, and the clear water tank 14 consists of two sets.

[0034] When the large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system described in this embodiment performs its preparation operation, the first movable base frame and the second movable base frame are sequentially connected as a whole, and the A-liquid slurry preparation system, the bentonite slurry preparation system, and the temporary slurry storage system are connected by flexible hoses. Figure 3 As shown, the specific method for preparing the double pulp includes the following steps:

[0035] 1. First, prepare solution A. Prepare a bentonite suspension using a bentonite pulping machine. After the bentonite suspension is transported into the solution A pulping machine, add water, stabilizer, and cement in sequence. The amount of water used in the bentonite suspension is 50-100% of the total amount of water used in solution A. The stirring time should not be less than 3 minutes.

[0036] 2. Liquid A is transported to the tunnel boring machine using a combination of pumping and pipeline transportation.

[0037] 3. Liquid B is temporarily stored using 5 sets of 20m³ liquid B storage tanks (usually PE plastic drums);

[0038] 4. Liquid B is pumped to the segment transfer vehicle by a variable frequency pump with a rated flow rate of 5 m³ / h, and then transported to the tunnel boring machine.

[0039] The large-diameter shield tunneling synchronous dual-liquid grouting slurry ground preparation system of this utility model consists of three modules: an A-liquid slurry preparation system, a bentonite slurry preparation system, and a temporary slurry storage system. Adopting a modular design and utilizing an automated control system, it achieves precise proportioning and continuous supply of the dual-liquid slurry, ensuring the quality of synchronous grouting during the tunneling process. Simultaneously, the system has a compact design and small footprint, making it suitable for use in confined urban spaces. The large-diameter shield tunneling synchronous dual-liquid grouting slurry ground preparation method provided by this utility model optimizes the preparation process, improves transportation efficiency, and reduces ground preparation costs.

Claims

1. A ground preparation system for synchronous dual-liquid grouting in large-diameter shield tunnels, characterized in that, This includes an A-liquid pulping system, a bentonite pulping system, and a temporary pulp storage system; The A-liquid slurry preparation system includes an A-liquid slurry preparation machine and a cement silo, and a first movable base frame is installed at the bottom of the A-liquid slurry preparation machine; The bentonite pulping system includes a bentonite pulping machine and a bentonite silo, and a second movable base is installed at the bottom of the bentonite pulping machine. The temporary slurry storage system includes a temporary slurry storage container for liquid A, a temporary slurry storage container for liquid B, and a clean water tank. The bottom of the first and second movable base frames is provided with multiple rows of rollers; During the preparation operation, the first and second mobile base frames are connected in sequence to form a whole, and the A-liquid slurry preparation system, the bentonite slurry preparation system and the temporary slurry storage system are connected by hoses.

2. The large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system according to claim 1, characterized in that, The first mobile base is also equipped with a stabilizer storage tank, which is connected to the A-liquid pulping machine via a hose pump and hose.

3. The large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system according to claim 1, characterized in that, The first and second movable base frames are welded from steel beams. The left and right sides of the first and second movable base frames are provided with docking supports, and the docking supports are provided with pin holes. When the docking supports of the left and right sides of the first and second movable base frames are spliced ​​together, a fixed connection is achieved by passing a pin through the pin hole.

4. The large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system according to claim 1, characterized in that, There are four sets of cement silos, two sets of bentonite silos, and two sets of clean water tanks; There are four sets of A-liquid pulping machines and two sets of bentonite pulping machines.

5. The large-diameter shield tunnel synchronous dual-liquid grouting slurry ground preparation system according to any one of claims 1-4, characterized in that, The temporary storage containers for liquid A consist of two 17m³ temporary storage mixing tanks.

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