Segment grouting gushing prevention device

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a segment grouting gushing prevention device which comprises a connecting sleeve, the outer surface of the connecting sleeve is sleeved with a fixing thread sleeve through threads, the surface of the fixing thread sleeve is fixedly connected with an abutting ring, and the inner surface of the connecting sleeve is sleeved with a connecting column through threads. The end, away from the connecting column, of the connecting sleeve is fixedly connected with an abutting block, and the outer surface of the connecting sleeve is fixedly connected with an air injection pipe. Under the use of the connecting sleeve, the anti-gushing effect on grouting is achieved, through the connection of the gas injection pipe and the gas channel and the passage connection of the gas channel and the sealing ring, through the use of gas injection equipment, gas can be injected into the sealing ring, the action volume of the sealing ring can be changed, and through the matched use of the fixing threaded sleeve, the sealing ring can be prevented from gushing. The effect of installing and supporting the connecting sleeve at the pipe piece drilling position is achieved, and under the effect of the connecting sleeve, grouting of a grouting pipe and gushing prevention operation of underground water in a rock-soil body in the grouting process are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, specifically to a segment grouting anti-blowout device. Background Technology

[0002] During shield tunneling, tunnel segments are used to support the tunnel and prevent collapse. During construction, grouting is also carried out at the contact points between the tunnel segments and the soil and rock mass. When secondary grouting is carried out at the locations of tunnel segments where the initial grouting was not in place, holes need to be drilled in the tunnel segments to facilitate the insertion of grouting pipes. However, during the grouting of the tunnel segments, groundwater pressure within the soil and rock mass can cause groundwater to gush out from the drilled holes in the tunnel segments, affecting the grouting operation. Utility Model Content

[0003] The purpose of this utility model is to provide a grouting anti-gushing device for tunnel segments, so as to solve the problem mentioned in the background art that when grouting tunnel segments, groundwater will gush out from the drilling location of the tunnel segment due to the influence of groundwater pressure in the soil and rock, which affects the grouting construction operation.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a segment grouting anti-blowout device, comprising a connecting sleeve, a fixing sleeve threaded onto the outer surface of the connecting sleeve, a retaining ring fixedly connected to the surface of the fixing sleeve, a connecting post threaded onto the inner surface of the connecting sleeve, a retaining block fixedly connected to the end of the connecting sleeve away from the connecting post, an air injection pipe fixedly connected to the outer surface of the connecting sleeve, a connecting rod fixedly connected to the surface of the connecting post, a retaining plate fixedly connected to the end of the connecting rod away from the connecting post, an air passage opened inside the connecting sleeve, and a sealing ring fixedly connected to the outer surface of the connecting sleeve.

[0005] Preferably, the connecting sleeve penetrates the surface of the tube segment, the abutment ring is in contact with the surface of the tube segment through a fixing screw sleeve, and the abutment ring is made of hard rubber.

[0006] Preferably, the connecting rod is long and acts inside the connecting sleeve through a connecting post, and the abutment is disc-shaped.

[0007] Preferably, the abutment plate is in contact with the surface of the abutment block through connecting columns and connecting rods, the abutment block is made of rubber, and the abutment blocks are evenly distributed in a fan shape on the inner wall of the connecting sleeve.

[0008] Preferably, the air injection tube is connected to the outer surface of the connecting sleeve at an angle, the air injection tube is connected to the air passage, and a rubber stopper is provided at the end of the air injection tube away from the contact with the connecting sleeve.

[0009] Preferably, the air passage and the sealing ring are connected, the sealing ring is fixed in three groups on the outer surface of the connecting sleeve, and the air injection tube is connected through the air passage and the sealing ring.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. Through the through connection of the connecting sleeve and the segment, the outer diameter of the connecting sleeve is adapted to the size of the borehole, and the inner diameter of the connecting sleeve is adapted to the size of the grouting pipe. With the use of the connecting sleeve, the anti-gushing effect of grouting is achieved. Through the connection of the air injection pipe and the air channel, and the passage connection between the air channel and the sealing ring, air can be injected into the sealing ring by the use of the air injection equipment, changing the effective volume of the sealing ring. With the cooperation of the fixing screw sleeve, the installation support effect of the connecting sleeve at the segment borehole position is achieved. With the action of the connecting sleeve, the grouting of the grouting pipe and the anti-gushing operation of groundwater in the rock and soil during the grouting process are facilitated.

[0012] 2. Through the connection of the abutment block and the connecting sleeve, the abutment block provides support for the grouting pipe at the connection position within the connecting sleeve, and to a certain extent, it also prevents grout backflow. When the grouting pipe is pulled out of the connecting sleeve, the abutment block can also clean the grout on the grouting pipe. With the connection of the connecting column and the connecting rod, the connection between the connecting rod and the abutment plate, through the contact between the abutment plate and the abutment block, further achieves the effect of preventing groundwater gushing within the rock and soil. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a three-dimensional sectional view of the structure of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the connecting sleeve of this utility model;

[0016] Figure 4 This is a three-dimensional sectional view of the connecting sleeve of this utility model;

[0017] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0018] In the diagram: 1. Connecting sleeve; 2. Fixing screw sleeve; 3. Abutment ring; 4. Connecting post; 41. Connecting rod; 42. Abutment plate; 5. Abutment block; 6. Air injection pipe; 7. Air passage; 8. Sealing ring. Detailed Implementation

[0019] Please see Figure 1-5 One embodiment provided by this utility model:

[0020] A segment grouting anti-blowout device includes a connecting sleeve 1. A fixing sleeve 2 is threaded onto the outer surface of the connecting sleeve 1. A retaining ring 3 is fixedly connected to the surface of the fixing sleeve 2. A connecting post 4 is threaded onto the inner surface of the connecting sleeve 1. A retaining block 5 is fixedly connected to the end of the connecting sleeve 1 away from the connecting post 4. An air injection pipe 6 is fixedly connected to the outer surface of the connecting sleeve 1. A connecting rod 41 is fixedly connected to the surface of the connecting post 4. A retaining plate 42 is fixedly connected to the end of the connecting rod 41 away from the connecting post 4. An air passage 7 is opened inside the connecting sleeve 1. A sealing ring 8 is fixedly connected to the outer surface of the connecting sleeve 1. The through connection between the connecting sleeve 1 and the segment facilitates the insertion of the grouting pipe to achieve the grouting effect between the segment and the soil. Under the action of the air injection pipe 6 and the air passage 7, it is convenient for the air injection equipment to inject air into the sealing ring 8, changing the effective volume of the sealing ring 8. With the use of the fixing sleeve 2, the connecting sleeve 1 is supported on the segment.

[0021] Furthermore, the connecting sleeve 1 penetrates the surface of the tube segment, and the abutment ring 3 abuts against the surface of the tube segment through the fixing screw sleeve 2. The abutment ring 3 is made of hard rubber. Through the connection of the connecting sleeve 1 and the fixing screw sleeve 2, the fixing screw sleeve 2 provides support for the position of the connecting sleeve 1 on the tube segment. With the connection of the fixing screw sleeve 2 and the abutment ring 3, the abutment ring 3 abuts against the surface of the tube segment, improving the support strength and performance of the fixing screw sleeve 2 for the position of the connecting sleeve 1 on the tube segment.

[0022] Furthermore, the connecting rod 41 is long and acts inside the connecting sleeve 1 through the connecting post 4. The abutment 42 is disc-shaped. Through the connection of the connecting post 4 and the connecting rod 41, and the connection of the connecting rod 41 and the abutment 42, and through the connection of the connecting post 4 and the connecting sleeve 1, the supporting control effect of the position of the connecting rod 41 and the abutment 42 within the connecting sleeve 1 is achieved.

[0023] Furthermore, the abutment plate 42 is in contact with the surface of the abutment block 5 through the connecting column 4 and the connecting rod 41. The abutment block 5 is made of rubber and is evenly distributed in a fan shape on the inner wall of the connecting sleeve 1. Through the abutment plate 42 and the abutment block 5, the abutment block 5 improves the blocking performance of groundwater gushing in the rock and soil, and achieves the effect of preventing gushing. Under the action of the abutment block 5, it can be used to prevent backflow of the grouting pipe during grouting, and can also be used to clean the surface grout of the grouting pipe when it is withdrawn from the connecting sleeve 1. It can also be used in conjunction with the use of the abutment plate 42 to achieve the blocking effect of grout after grouting.

[0024] Furthermore, the air injection pipe 6 is connected to the outer surface of the connecting sleeve 1 at an angle. The air injection pipe 6 and the air passage 7 are connected. A rubber plug is provided at the end of the air injection pipe 6 away from the contact with the connecting sleeve 1. Through the connection between the air injection pipe 6 and the air passage 7, it is convenient for gas to enter the air passage 7 through the air injection pipe 6. The rubber plug on the air injection pipe 6 can prevent the gas injected into the air passage 7 from flowing back. When the rubber plug is not used, the air injection device and the air injection pipe 6 can be connected without separation, maintaining the air pressure injected into the sealing ring 8.

[0025] Furthermore, the air passage 7 and the sealing ring 8 are connected. The sealing ring 8 is fixed in three groups on the outer surface of the connecting sleeve 1. The air injection pipe 6 is connected through the air passage 7 and the sealing ring 8. Through the connection between the air passage 7 and the sealing ring 8, the air injection operation is realized under the action of the air injection pipe 6 and the air injection device, which changes the working volume of the sealing ring 8 and makes it tightly abut against the outer surface of the tube segment. With the cooperation of the fixing screw sleeve 2 and the sealing ring 8, the supporting and limiting effect of the connecting sleeve 1 on the tube segment is achieved.

[0026] Working principle: When performing grouting at the installed tunnel segment location, holes are first drilled at the corresponding tunnel segment locations. Then, the connecting sleeve 1 is inserted into the tunnel segment through the drilled holes to facilitate the penetration of the grouting pipe through the segment, completing the grouting process. During the installation of the connecting sleeve 1, the air is introduced through the connection of the air injection device and the air injection pipe 6, allowing gas to enter the sealing ring 8 via the air injection pipe 6 and the air passage 7. At this time, the effective volume of the sealing ring 8 changes. Combined with the use of the fixing screw sleeve 2, the connecting sleeve 1 is fixed at the tunnel segment location, completing the grouting process. After fixing the position of the connecting sleeve 1, rotate the connecting column 4 to pull the abutment plate 42 out from the connecting sleeve 1. The grouting pipe passes through the pipe segment through the connecting sleeve 1 to realize grouting. During the grouting process, the abutment block 5 can be used to prevent backflow of the grouting pipe during grouting, and can also be used to clean the surface grout when the grouting pipe is pulled out of the connecting sleeve 1. After the grouting is completed, connect the connecting column 4 and the connecting sleeve 1. At this time, the abutment plate 42 and the abutment block 5 abut together, so that the abutment block 5 blocks the grout, achieving the effect of preventing groundwater from gushing in the rock and soil.

Claims

1. A pipe-jacking jet grouting anti-burst device comprising a connecting sleeve, characterized in that: The outer surface of the connecting sleeve is threaded with a fixing sleeve, and the surface of the fixing sleeve is fixedly connected with a stop ring. The inner surface of the connecting sleeve is threaded with a connecting post, and the end of the connecting sleeve away from the connecting post is fixedly connected with a stop block. The outer surface of the connecting sleeve is fixedly connected with an air injection pipe, and the surface of the connecting post is fixedly connected with a connecting rod. The end of the connecting rod away from the connecting post is fixedly connected with a stop plate. An air passage is opened inside the connecting sleeve, and a sealing ring is fixedly connected to the outer surface of the connecting sleeve.

2. A pipe segment grouting blowout-preventing device according to claim 1, characterized in that: The connecting sleeve penetrates the surface of the tube segment, and the abutment ring abuts against the surface of the tube segment through a fixing screw sleeve. The abutment ring is made of hard rubber.

3. The pipe segment grouting blowout-preventing device according to claim 1, characterized in that: The connecting rod is long and acts inside the connecting sleeve through a connecting post. The abutment is disc-shaped.

4. The pipe segment grouting blowout-preventing device according to claim 1, characterized in that: The abutment plate is in contact with the surface of the abutment block through the connecting column and connecting rod. The abutment block is made of rubber and is evenly distributed in a fan shape on the inner wall of the connecting sleeve.

5. The pipe segment grouting blowout-preventing device according to claim 1, characterized in that: The air injection tube is connected to the outer surface of the connecting sleeve at an angle. The air injection tube is connected to the air passage. A rubber plug is provided at the end of the air injection tube away from the end that contacts the connecting sleeve.

6. A pipe segment grouting blowout prevention device according to claim 1, wherein: The air passage and the sealing ring are connected. The sealing ring is fixed in three sets on the outer surface of the connecting sleeve. The air injection tube is connected through the air passage and the sealing ring.

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