Water-rich stratum subway tunnel shield starting water stopping steel cabin device

Abstract

The utility model provides a water-stopping steel cabin device for shield launching of a subway tunnel in a water-rich stratum. The water-rich stratum subway tunnel shield starting water-stopping steel cabin device comprises a water-stopping steel cabin unit which is arranged on a tunnel portal and used for water stopping of a shield tunneling machine, and the water-stopping steel cabin unit comprises four half cabins, two sets of L-shaped blocks and two sets of steel wire brushes; the four half cabins are spliced and welded to form a water stop steel cabin, the water stop steel cabin comprises an inner ring, two groups of L-shaped blocks are symmetrically mounted in the inner ring, two groups of steel wire brushes are respectively mounted on the two groups of L-shaped blocks, and waterproof grease is coated on the two groups of steel wire brushes; space between the two L-shaped blocks and the two steel wire brushes forms a common inner cavity, and the four half cabins are each provided with a material injection mechanism. The water-rich stratum subway tunnel shield starting water stopping steel cabin device can bear larger water pressure, can adapt to various complex water-rich stratum conditions, can effectively block underground water, reduces the water burst risk, can guarantee shield starting safety, and achieves the water stopping purpose in the shield starting period.

Description

Technical Field

[0001] This utility model belongs to the technical field of subway tunnel construction equipment, and in particular relates to a water-rich stratum subway tunnel shield starting water-stopping steel chamber device. Background Technology

[0002] In shield tunneling for subways, the launching and receiving of the tunnel boring machine (TBM) are the two most critical processes. This is because groundwater can easily seep into the tunnel entrance through the gap between the shield and the ground. In water-rich strata, traditional anti-seepage measures for subway tunnels, besides grouting and reinforcing the soil at the tunnel entrance, also include auxiliary water-stopping measures such as "horizontal freezing + steel sleeve," "small steel box receiving," and "rubber sheet curtain." However, the technical limitations of these traditional measures are becoming increasingly apparent. The "horizontal freezing + steel sleeve" process forms a temporary water-stopping curtain by freezing the ground, and the steel sleeve provides structural support, resulting in significant water-stopping effects. However, it has three major drawbacks: First, frost heave and thawing settlement can easily cause uneven deformation of the ground, causing secondary damage to surrounding buildings and structures. The construction process has several drawbacks: firstly, it is prone to disasters; secondly, it has a long construction period and high energy consumption, and there is a risk of seepage channels reactivating after the frozen pipes are removed; thirdly, the steel sleeves are heavy, require high installation precision, are difficult to operate, have high costs, and have a long construction period; the "small steel box receiving" technology uses a short steel box placed externally at the tunnel entrance, which can shorten the construction period, but the sealing performance is greatly affected by the welding quality, and a seepage channel is easily formed between the steel box and the tunnel entrance concrete, requiring frequent grouting and sealing later; the "rubber sheet curtain water stop" solution uses multiple layers of rubber sheets to compress and stop water, but its water pressure resistance is limited (usually ≤0.3MPa), the curtain fixing device is prone to failure due to shield tunneling disturbance, and the elasticity of the rubber sheets decreases rapidly after aging, making them prone to tearing or peeling under dynamic water pressure, leading to water stop failure.

[0003] In summary, existing technologies all suffer from common problems such as passive defense, insufficient durability, and poor adaptability, making it difficult to meet the engineering requirements for safe launch and reception of shield tunnels under complex water-rich strata. Therefore, it is necessary to provide a new water-stopping steel cabin device for the launch of subway tunnel shields in water-rich strata to solve the above-mentioned technical problems. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a water-stopping steel cabin device for the starting of a subway tunnel shield in water-rich strata that can withstand greater water pressure, adapt to various complex water-rich geological conditions, effectively block groundwater, reduce the risk of water inrush, ensure the safety of shield tunneling, and achieve the goal of water-stopping during shield tunneling.

[0005] To solve the above-mentioned technical problems, the present invention provides a water-stopping steel chamber device for the starting of a subway tunnel shield machine in water-rich strata, comprising: a water-stopping steel chamber unit installed on the tunnel portal for water-stopping of the shield machine, wherein the water-stopping steel chamber unit comprises four half chambers, two sets of L-shaped blocks and two sets of wire brushes.

[0006] Four half-chambers are spliced ​​and welded together to form a water-stop steel chamber. The water-stop steel chamber includes an inner ring. Two sets of L-shaped blocks are symmetrically installed in the inner ring. Two sets of wire brushes are respectively installed on the two sets of L-shaped blocks. Both sets of wire brushes are coated with waterproof grease.

[0007] The space between the two sets of L-shaped blocks and the two sets of wire brushes forms a common inner cavity. Each of the four half-chambers is equipped with a grouting mechanism, which includes a grouting pipe, a grout discharge pipe and a connecting assembly. The grouting pipe is installed on the corresponding half-chamber, with one end of the grouting pipe extending into the inner cavity. The other end of the grouting pipe is sealed to the grout discharge pipe through the connecting assembly. The end of the grout discharge pipe away from the grouting pipe is connected to the pump.

[0008] As a further embodiment of this utility model, a sealing groove is provided on the inner wall of the grouting pipe and the grout discharge pipe at their adjacent ends. A sealing ring 1 is installed in the sealing groove of the grouting pipe, and the sealing ring 1 is adapted to the sealing groove of the grouting pipe. A sealing ring 2 is installed in the sealing groove of the grout discharge pipe, and the sealing ring 2 is adapted to the sealing groove of the grout discharge pipe.

[0009] As a further embodiment of this utility model, one end of the second sealing ring extends to the sealing groove on the grouting pipe and is adapted to the sealing groove on the grouting pipe and the first sealing ring.

[0010] As a further embodiment of this utility model, the connecting assembly includes a first fixed collar, a second fixed collar, a rotating ring, four handles and a threaded ring. The first fixed collar and the second fixed collar are respectively fixedly sleeved on the ends of the grouting pipe and the grout discharge pipe that are close to each other. The outer wall of the first fixed collar near the second fixed collar has a groove.

[0011] As a further embodiment of this utility model, the outer wall of the rotating ring near the first fixed collar extends into the groove and is rotatably connected to the groove. The four handles are installed in pairs on the outer wall of the rotating ring. The outer wall of the rotating ring near the second fixed collar is provided with a threaded groove.

[0012] As a further embodiment of this utility model, the threaded ring is rotatably mounted on the outer wall of the fixed collar two near the fixed collar one, and the threaded ring is screwed into the threaded groove.

[0013] Compared with related technologies, the water-stopping steel chamber device for the starting of subway tunnel shield tunneling in water-rich strata provided by this utility model has the following beneficial effects:

[0014] 1. This utility model, by setting up a water-stop steel chamber unit, enables it to withstand greater water pressure, adapt to various complex water-rich geological conditions, effectively block groundwater, reduce the risk of water inrush, ensure the safety of shield tunneling, and achieve the goal of water stoppage during shield tunneling.

[0015] 2. This utility model achieves reliable sealing by setting a first sealing ring, a second sealing ring, and a connecting component, reducing the risk of leakage. At the same time, the sealing body formed by the injection of water-stopping material into the inner cavity is not easily affected by factors such as shield tunneling disturbance and rubber aging. Compared with traditional technology, its durability is significantly improved, reducing the frequency and cost of subsequent grouting and sealing. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a front view schematic diagram of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the water-stopping steel tank unit of this utility model;

[0019] Figure 3 This is a schematic diagram of the injection mechanism in this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the injection mechanism in this utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the injection mechanism in this utility model. Figure 3 .

[0022] In the diagram: 1. Tunnel boring machine; 2. Water-stop steel chamber unit; 21. Half chamber; 22. L-shaped block; 23. Wire brush; 24. Inner cavity; 3. Injection mechanism; 31. Grouting pipe; 32. Grout discharge pipe; 33. Fixed collar one; 34. Fixed collar two; 35. Groove; 36. Rotating ring; 37. Handle; 38. Threaded groove; 39. Threaded ring; 4. Sealing ring one; 5. Sealing ring two. Detailed Implementation

[0023] Please refer to the following: Figures 1 to 5 ,in, Figure 1 This is a front view schematic diagram of the present utility model; Figure 2 This is a schematic diagram of the structure of the water-stopping steel tank unit of this utility model; Figure 3 This is a schematic diagram of the injection mechanism in this utility model. Figure 1 ; Figure 4 This is a schematic diagram of the injection mechanism in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the injection mechanism in this utility model. Figure 3The water-rich stratum subway tunnel shield launching water-stopping steel cabin device includes: a water-stopping steel cabin unit 2 installed on the tunnel portal for water-stopping of the shield machine 1. The water-stopping steel cabin unit 2 includes four half-cabins 21, two sets of L-shaped blocks 22 and two sets of wire brushes 23. Each set of L-shaped blocks 22 has multiple components.

[0024] Four half-chambers 21 are spliced ​​and welded to form a water-stop steel chamber. The water-stop steel chamber includes an inner ring. Two sets of L-shaped blocks 22 are symmetrically installed in the inner ring. Two sets of wire brushes 23 are respectively installed on the two sets of L-shaped blocks 22. Both sets of wire brushes 23 are coated with waterproof grease.

[0025] The space between the two sets of L-shaped blocks 22 and the two sets of wire brushes 23 forms a common inner cavity 24. Each of the four half-chambers 21 is equipped with a grouting mechanism 3. The grouting mechanism 3 includes a grouting pipe 31, a grout discharge pipe 32 and a connecting assembly. The grouting pipe 31 is installed on the corresponding half-chamber 21. One end of the grouting pipe 31 extends into the inner cavity 24. The other end of the grouting pipe 31 is sealed to the grout discharge pipe 32 through the connecting assembly. The end of the grout discharge pipe 32 away from the grouting pipe 31 is connected to the pump.

[0026] The pump is an existing finished product and is not shown in the drawing.

[0027] The inner walls of the grouting pipe 31 and the grout discharge pipe 32, which are close to each other, are provided with sealing grooves. A sealing ring 4 is installed in the sealing groove of the grouting pipe 31. The sealing ring 4 is adapted to the sealing groove of the grouting pipe 31. A sealing ring 5 is installed in the sealing groove of the grout discharge pipe 32. The sealing ring 5 is adapted to the sealing groove of the grout discharge pipe 32.

[0028] One end of the second sealing ring 5 extends to the sealing groove on the grouting pipe 31 and is adapted to the sealing groove on the grouting pipe 31 and the first sealing ring 4.

[0029] The connecting assembly includes a first fixing collar 33, a second fixing collar 34, a rotating ring 36, four handles 37 and a threaded ring 39. The first fixing collar 33 and the second fixing collar 34 are respectively fixedly sleeved on the ends of the grouting pipe 31 and the grout discharge pipe 32 that are close to each other. The outer wall of the first fixing collar 33 near the second fixing collar 34 has a groove 35.

[0030] The rotating ring 36 extends into the groove 35 from the outer wall of the side near the fixed collar 33 and is rotatably connected to the groove 35. The four handles 37 are installed in pairs on the outer wall of the rotating ring 36. The outer wall of the rotating ring 36 near the fixed collar 34 is provided with a threaded groove 38.

[0031] The threaded ring 39 is rotatably mounted on the outer wall of the fixed collar 34 near the fixed collar 33, and the threaded ring 39 is screwed into the threaded groove 38.

[0032] The working principle of the water-stopping steel chamber device for starting subway tunnel boring machines in water-rich strata provided by this utility model is as follows:

[0033] The first step: The water-stop steel chamber is assembled by splicing and welding four half-chambers 2. The steel chamber is connected to the tunnel portal by bolts. Its inner diameter is the same as the diameter of the tunnel portal. The shield machine (cutterhead, shield body) slowly enters the water-stop steel chamber. At this time, the wire brush 23 is squeezed and deformed by the shield body to fully adhere to the shield body. Then, through the grouting pipe 31 on the grouting mechanism 3, and through the connection of the grout discharge pipe 32 with the external pump, grease is injected into the inner cavity 24 formed by the space between the two sets of L-shaped blocks 22 and the two sets of wire brushes 23. Under the action of the grease, when the groundwater flows along the gap between the shield body and the soil layer to the wire brush 23, the grease and the waterproof grease on the wire brush 23 form a seal, which can effectively prevent the groundwater from continuing to flow and prevent it from rushing to the starting shaft, thereby achieving the water-stopping effect.

[0034] The second step: Before the tunnel boring machine starts, the rotating ring 36 is rotated by the four handles 37 on the rotating ring 36. Since the rotating ring 36 is rotatably connected to the fixed sleeve 33, and the threaded ring 39 is screwed into the threaded groove 38 of the rotating ring 36, the threaded ring 39 is rotatably installed on the fixed sleeve 34, thereby tightly sealing the grouting pipe 31 and the grout discharge pipe 32 through the connecting assembly. Then, the end of the grout discharge pipe 32 away from the grouting pipe 31 is connected to the pump, in preparation for injecting water-stopping material into the inner cavity 24 of the water-stopping steel chamber unit 2.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made to these embodiments, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A water-rich stratum subway tunnel shield launching water-stopping steel cabin device, characterized in that, include: A water-stopping steel chamber unit is installed on the tunnel portal for water-stopping of the tunnel boring machine. The water-stopping steel chamber unit consists of four half chambers, two sets of L-shaped blocks, and two sets of wire brushes. Four half-chambers are spliced ​​and welded together to form a water-stop steel chamber. The water-stop steel chamber includes an inner ring. Two sets of L-shaped blocks are symmetrically installed in the inner ring. Two sets of wire brushes are respectively installed on the two sets of L-shaped blocks. Both sets of wire brushes are coated with waterproof grease. The space between the two sets of L-shaped blocks and the two sets of wire brushes forms a common inner cavity. Each of the four half-chambers is equipped with a grouting mechanism, which includes a grouting pipe, a grout discharge pipe and a connecting assembly. The grouting pipe is installed on the corresponding half-chamber, with one end of the grouting pipe extending into the inner cavity. The other end of the grouting pipe is sealed to the grout discharge pipe through the connecting assembly. The end of the grout discharge pipe away from the grouting pipe is connected to the pump.

2. The water-rich formation subway tunnel shield launching water-stop steel cabin device according to claim 1, characterized in that: The inner walls of the grouting pipe and the grout discharge pipe at their closest points are each provided with a sealing groove. A sealing ring 1 is installed in the sealing groove of the grouting pipe, and the sealing ring 1 is adapted to the sealing groove of the grouting pipe. A sealing ring 2 is installed in the sealing groove of the grout discharge pipe, and the sealing ring 2 is adapted to the sealing groove of the grout discharge pipe.

3. The water-rich formation subway tunnel shield launching water-stop steel cabin device according to claim 2, characterized in that: One end of the second sealing ring extends to the sealing groove on the grouting pipe and is adapted to the sealing groove on the grouting pipe and the first sealing ring.

4. The water-stopping steel chamber device for starting subway tunnel boring machines in water-rich strata according to claim 1, characterized in that: The connecting assembly includes a first fixed collar, a second fixed collar, a rotating ring, four handles, and a threaded ring. The first fixed collar and the second fixed collar are respectively fixedly sleeved on the ends of the grouting pipe and the grout discharge pipe that are close to each other. The outer wall of the first fixed collar near the second fixed collar has a groove.

5. The water-rich formation subway tunnel shield launching water-stop steel cabin device according to claim 4, characterized in that: The outer wall of the rotating ring near the first fixed collar extends into the groove and is rotatably connected to the groove. The four handles are installed in pairs on the outer wall of the rotating ring. The outer wall of the rotating ring near the second fixed collar has a threaded groove.

6. The water-rich formation subway tunnel shield launching water-stop steel cabin device according to claim 4, characterized in that: The threaded ring is rotatably mounted on the outer wall of the fixed collar two near the fixed collar one, and the threaded ring is screwed into the threaded groove.

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