A method for preventing and controlling leakage at the shield tunnel portal during reception

Abstract

The present invention relates to the technical field of shield machine reception, and particularly to a method for preventing and controlling leakage in shield tunnel portal reception, including a reinforcement frame, a grouting device, a sealing device and a reception frame. A fixed cover is fixedly connected to the left side of the reinforcement frame, and a first steel sleeve is installed on the other side of the fixed cover. A second steel sleeve is installed on one side of the first steel sleeve. There are three second steel sleeves in total, and there are two first steel sleeves in total. The two first steel sleeves are respectively arranged on the left and right sides of the three second steel sleeves. A reception frame is arranged at the bottom of the second steel sleeve. Boxes are fixedly connected to the front and rear sides of the left first steel sleeve. The two first steel sleeves are arranged side by side on both sides above the reception frame. In the present invention, through the provided sealing main body, fixed pipe, fixed frame, spring, sealing structure and grouting main body, grouting can be carried out on the outer side of the first steel sleeve when the grouting device of the shield machine grouts, thereby improving the grouting efficiency and the plugging effect.

Description

Technical Field

[0001] The present invention relates to the technical field of shield machine reception, and specifically provides a method for preventing and controlling leakage during shield tunnel portal reception. Background Technique

[0002] A shield machine is a tunnel boring machine using the shield method. While tunneling, the shield machine lays supporting segments for the tunnel. After the operation and excavation of the shield machine are completed, the shield machine needs to be received. At this time, the shield machine directly tunnels out of the portal. In order to prevent a large amount of mud and water in the geological layer from pouring into the recovery well, it is necessary to grout the supporting segments laid by the shield machine and suddenly to seal the gaps.

[0003] In the traditional shield reception method during grouting and sealing, usually after the shield machine tunnels to a suitable position, the sealing material is directly poured between the segments and the soil through the grouting device inside the shield machine to seal the gaps in the soil and reduce the penetration of mud and water. At this time, only the grouting device inside the shield machine is used for grouting. In the steel sleeve recovery method, only the grouting equipment inside the shield machine is used for grouting, and the grouting efficiency is low, resulting in poor sealing effect. In view of the above problems, a method for preventing and controlling leakage during shield tunnel portal reception is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for preventing and controlling leakage during shield tunnel portal reception to solve the problems of low sealing efficiency and poor effect.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A method for preventing and controlling leakage during shield tunnel portal reception, including a reinforcement frame, a grouting device, a sealing device, and a receiving frame. A fixed cover is fixedly connected to the left side of the reinforcement frame. The other side of the fixed cover is provided with a first steel sleeve. A second steel sleeve is installed on one side of the first steel sleeve. There are three second steel sleeves in total. There are two first steel sleeves in total. The two first steel sleeves are respectively arranged on the left and right sides of the three second steel sleeves. A receiving frame is provided at the bottom of the second steel sleeve. Boxes are fixedly connected to the front and rear sides of the left first steel sleeve. The two first steel sleeves are arranged side by side on both sides above the receiving frame. A grouting device is installed on the top of the left first steel sleeve. A sealing device is installed on the top of the left second steel sleeve. A pressure test cover is fixedly connected to the top of the middle second steel sleeve. A blanking cover is fixedly connected to the top of the right second steel sleeve.

[0007] Preferably, the receiving frame includes a support frame, a support rod, and a positioning device. Both ends of the support frame are fixedly connected with support plates. A positioning plate is fixedly connected to the top of the support plate. A support rod is provided on the top of the positioning plate. Positioning blocks are provided on both the front and rear sides of the bottom of the support rod. The bottom of the positioning block is fixedly connected to the positioning plate. The side of the support rod close to the first steel sleeve is inclined inward. A fixing bolt is provided inside the support rod. The fixing bolt penetrates the positioning plate. A fixing nut is spirally connected to the lower side of the outer side of the fixing bolt. The positioning plate and the support rod are fixedly connected by the fixing bolt and the fixing nut. Through holes symmetrically arranged in the front and rear are formed in the support frame. A connecting rod is provided in the through holes formed in the support frame. A positioning device is provided on the outer side of the connecting rod. The support frame is arranged inside the positioning device.

[0008] Preferably, the positioning device includes a top cover and a positioning rod. A plug board is fixedly connected to the inner bottom of the top cover. The plug board is arranged inside the support frame. The plug board penetrates the connecting rod. Positioning bolts are provided on both the left and right sides inside the top cover. A positioning nut is spirally connected to the upper side of the outer side of the positioning bolt. The bottom end of the positioning bolt is fixedly connected to the positioning rod. The bottom end of the positioning rod is fixedly connected to a bottom rod. Two bottom rods are arranged as a group on the left and right sides of the support rod.

[0009] Preferably, the grouting device includes a sealing main body and a grouting main body. The grouting main body is arranged inside the grouting main body. The sealing main body includes a fixed pipe and a sealing structure. The lower side of the outer side of the fixed pipe is fixedly connected to the first steel sleeve. A fixing frame is fixedly connected inside the fixed pipe. A spring is fixedly connected to the bottom of the fixing frame. The bottom end of the spring is fixedly connected to the sealing structure. The fixing frame is arranged in a cross shape. The grouting main body includes a grouting valve and a mounting frame. A limiting ring is fixedly connected to the outer side of the grouting valve. A fixed shell is provided on the outer side of the limiting ring. The grouting valve penetrates the fixed shell. The fixed shell is spirally connected to the fixed pipe. A mounting frame is fixedly connected to the lower part inside the grouting valve. A push rod is fixedly connected to the bottom end of the mounting frame. The mounting frame is arranged in a cross shape. The push rod is arranged inside the spring. The bottom end of the push rod is arranged inside the sealing structure.

[0010] Preferably, the sealing structure includes a connecting block. A sealing block is fixedly connected to the bottom of the connecting block. A bottom plate is fixedly connected to the bottom of the sealing block. The sealing block is arranged in a frustum shape.

[0011] Preferably, the top of the limiting ring is in close fit with the fixed shell, the bottom of the limiting ring is in close fit with the fixed pipe, and the push rod penetrates the fixing frame.

[0012] Preferably, the sealing device includes a sealing ring, a limiting device and a leak-proof device. A fixing block is fixedly connected inside the top of the sealing ring. An air inlet valve is fixedly connected inside the fixing block. The outside of the air inlet valve is arranged inside the leak-proof device. The outside of the sealing ring is provided with uniformly distributed limiting devices. The limiting device includes a fixing plate. A fixing screw is arranged inside the fixing plate. The bottom of the fixing screw is in screw connection with a second steel sleeve. The bottom of the fixing plate is fixedly connected with a sealing pad. The bottom of the sealing pad is in close fit with the second steel sleeve. The limiting device includes a limiting frame. Limiting plates are fixedly connected to the sides of the left and right sides of the limiting frame close to the second steel sleeve. A limiting screw is arranged inside the limiting plate. One end of the limiting screw is in screw connection with the second steel sleeve.

[0013] Preferably, the air inlet valve penetrates through the sealing pad, and the fixing screw penetrates through the sealing pad. Two fixing screws are arranged as a group on the left and right sides of the air inlet valve.

[0014] Preferably, it includes the following steps:

[0015] Step 1: When recycling the shield machine, in order to prevent leakage at the receiving hole, a sealing steel ring is arranged outside the receiving hole. Then, the first steel sleeve and the second steel sleeve need to be connected to the sealing steel ring outside the receiving hole. At this time, the accessories of the receiving frame are directly placed into the receiving hole. Then, the positioning block arranged at the top of the positioning plate is inserted into the support rod. Then, the support rod and the positioning plate are fixed through the fixing bolts and fixing nuts. Then, the connecting rod is inserted into the through hole opened in the support frame. At this time, the insertion plate arranged in the top cover penetrates through the support frame and the connecting rod, and then is placed into the connecting rod. At the same time, the positioning rod together with the positioning bolt penetrates through the connecting rod and the top cover. Then, the positioning nut is screwed on the outside of the positioning bolt to fix the connecting rod. After that, the first steel sleeve and the second steel sleeve are assembled on the receiving frame. Then, the first steel sleeve arranged on the left side is fixedly connected to the hole sealing steel ring through the installation bolts;

[0016] Step 2: After the first steel sleeve and the second steel sleeve are assembled, at this time, the air inlet valve is passed through the second steel sleeve arranged on the leftmost side. Then, the fixing plate is placed outside the air inlet valve. At this time, the fixing screw penetrates through the fixing plate. Then, the fixing screw is screwed with the second steel sleeve until the bottom of the sealing pad is in close fit with the second steel sleeve. After that, the fixing cover is fixed to one side of the first steel sleeve arranged on the right side through the installation bolts. At this time, the fixing frame is fixed to the fixing cover and the ground through the installation screws;

[0017] Step 3: Open the pressure test cover and pour in clean water to detect the sealing performance between the first steel sleeve, the second steel sleeve, the fixed cover and the sealing steel ring. After the detection, drain the clean water, open the box body, then chisel the hole, and then clean the materials. Open the blanking cover and pour soil into the first steel sleeve and the second steel sleeve. The soil connects the receiving hole with the gaps between the first steel sleeve and the second steel sleeve. Then the shield structure tunnels into the first steel sleeve and the second steel sleeve.

[0018] Step 4: Insert the grouting valve into the fixed pipe. At this time, the push rod is inserted into the connecting block, and then the fixed shell is sleeved outside the grouting valve. Rotate the fixed shell, and at this time, the fixed shell is screwed to the fixed pipe until the bottom of the limit ring is in close contact with the fixed pipe. At the same time, the push rod pushes the sealing block away from the bottom end of the fixed pipe downward. Then the shield mechanism grouts in the shield hole. At this time, the plugging material injected by the shield mechanism is between the segment and the soil at the receiving hole. At the same time, grouting is carried out through the grouting main body, and a large amount of plugging material is injected between the segment and the soil of the first steel sleeve. At this time, the plugging materials on both sides of the sealing steel sleeve move towards the sealing steel sleeve at the same time, and the gaps in the receiving hole can be quickly filled to prevent sediment and water leakage. At the same time, air is injected into the sealing ring through the air inlet valve. As the air in the air inlet valve increases, the sealing ring gradually expands, and the second steel sleeve and the segment are sealed through the sealing ring. At this time, the material cannot move towards the second steel sleeve. As the material is continuously injected, the pressure of the material between the segment and the soil gradually increases. Under the action of the pressure, the material enters the soil in the receiving hole. Through grouting on both sides at the same time, the pressure of the plugging material is further increased. At this time, the plugging material can quickly enter the soil to fill the gaps in the soil for plugging to prevent leakage.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In the present invention, through the provided sealing main body, fixed pipe, fixed frame, spring, sealing structure and grouting main body, grouting can be carried out outside the first steel sleeve when the grouting device of the shield machine grouts, thereby improving the grouting efficiency and the plugging effect.

[0021] 2. In the present invention, through the provided sealing ring, limiting device, air inlet valve and anti-leakage device, the second steel sleeve can be conveniently sealed to prevent the leakage of the plugging material, reduce the consumption of the plugging material, and thus save costs.

[0022] 3. In the present invention, through the provided support frame, support plate, positioning plate, support rod, fixing bolt, positioning block, positioning device and connecting rod, the first steel sleeve and the second steel sleeve can be conveniently supported, which is convenient for assembly and facilitates the disassembly and recycling of the shield machine. Description of the Drawings

[0023] Figure 1Schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the receiving rack of the present invention;

[0025] Figure 3 Schematic diagram of the installation structure of the positioning device of the present invention;

[0026] Figure 4 Schematic diagram of the installation structure of the support rod of the present invention;

[0027] Figure 5 For the present invention Figure 2 Schematic diagram of the structure at location A;

[0028] Figure 6 Schematic diagram of the structure of the grouting device of the present invention

[0029] Figure 7 Schematic diagram of the installation structure of the grouting main body of the present invention;

[0030] Figure 8 Schematic diagram of the installation structure of the push rod of the present invention;

[0031] Figure 9 Schematic diagram of the installation structure of the sealing device of the present invention

[0032] Figure 10 Schematic diagram of the installation structure of the leak prevention device of the present invention;

[0033] Figure 11 Schematic diagram of the installation structure of the limiting device of the present invention;

[0034] Figure 12 For the present invention Figure 9 Schematic diagram of the structure at location A.

[0035] In the figure: 1 - reinforcement frame, 2 - first steel sleeve, 3 - second steel sleeve, 4 - grouting device, 41 - sealing main body, 411 - fixed pipe, 412 - fixing frame, 413 - spring, 414 - sealing structure, 4141 - connecting block, 4142 - sealing block, 4143 - bottom plate, 42 - grouting main body, 421 - grouting valve, 422 - fixed shell, 423 - limiting ring, 424 - mounting frame, 425 - push rod, 5 - sealing device, 51 - sealing ring, 52 - limiting device, 521 - limiting frame, 522 - limiting plate, 523 - limiting screw, 53 - air inlet valve, 54 - leakage prevention device, 541 - fixing plate, 542 - sealing gasket, 543 - fixing screw, 55 - fixing block, 6 - fixing cover, 8 - box body, 9 - receiving frame, 91 - support frame, 92 - support plate, 93 - positioning plate, 94 - support rod, 95 - fixing bolt, 96 - fixing nut, 97 - positioning block, 98 - positioning device, 981 - top cover, 982 - insertion plate, 983 - bottom rod, 984 - positioning rod, 985 - positioning bolt, 986 - positioning nut, 99 - connecting rod, 910 - through hole, 10 - pressure test cover, 11 - blanking cover. Detailed implementation manners

[0036] Please refer to Figures 1 - 12 , the present invention provides a technical solution:

[0037] A method for preventing and controlling leakage at the shield tunnel portal reception includes a reinforcement frame 1, a grouting device 4, a sealing device 5 and a receiving frame 9. A fixing cover 6 is fixedly connected to the left side of the reinforcement frame 1, a first steel sleeve 2 is installed on the other side of the fixing cover 6, a second steel sleeve 3 is installed on one side of the first steel sleeve 2. There are three second steel sleeves 3 in total, and two first steel sleeves 2 in total. The two first steel sleeves 2 are respectively arranged on the left and right sides of the three second steel sleeves 3. A receiving frame 9 is provided at the bottom of the second steel sleeve 3. Boxes 8 are fixedly connected to the front and rear sides of the left first steel sleeve 2. The two first steel sleeves 2 are arranged in parallel on both sides above the receiving frame 9. A grouting device 4 is installed on the top of the left first steel sleeve 2, a sealing device 5 is installed on the top of the left second steel sleeve 3, a pressure test cover 10 is fixedly connected to the top of the middle second steel sleeve 3, and a blanking cover 11 is fixedly connected to the top of the right second steel sleeve 3. Through this setting, the steel structure can be assembled conveniently, which is convenient for the shield machine to receive.

[0038] Please refer to Figures 1 - 5 , the present invention provides a technical solution:

[0039] The receiving frame 9 includes a support frame 91, a support rod 94, and a positioning device 98. Both ends of the support frame 91 are fixedly connected with support plates 92. A positioning plate 93 is fixedly connected to the top of the support plate 92. A support rod 94 is provided on the top of the positioning plate 93. Positioning blocks 97 are provided on both the front and rear sides of the bottom of the support rod 94. The bottom of the positioning block 97 is fixedly connected to the positioning plate 93. The side of the support rod 94 close to the first steel sleeve 2 is inclined inward. A fixing bolt 95 is provided inside the support rod 94. The fixing bolt 95 penetrates through the positioning plate 93. A fixing nut 96 is screwed on the lower side of the outer side of the fixing bolt 95. The positioning plate 93 and the support rod 94 are fixedly connected by the fixing bolt 95 and the fixing nut 96. Through holes 910 are symmetrically arranged in the front and rear directions inside the support frame 91. A connecting rod 99 is provided in the through holes 910 opened in the support frame 91. A positioning device 98 is provided outside the connecting rod 99. The support frame 91 is arranged inside the positioning device 98. Through this setting, the assembly of the receiving frame 9 can be conveniently carried out, which is convenient for the transportation and use of the receiving frame 9 and facilitates the reception of the shield machine. The positioning device 98 includes a top cover 981 and a positioning rod 984. A plug board 982 is fixedly connected to the inner bottom of the top cover 981. The plug board 982 is arranged inside the support frame 91. The plug board 982 penetrates through the connecting rod 99. Positioning bolts 985 are provided on both the left and right sides inside the top cover 981. A positioning nut 986 is screwed on the upper side of the outer side of the positioning bolt 985. The bottom end of the positioning bolt 985 is fixedly connected to the positioning rod 984. The bottom end of the positioning rod 984 is fixedly connected to a bottom rod 983. Two bottom rods 983 are arranged as a group on the left and right sides of the support rod 94. Through this setting, the use of the receiving frame 9 can be made more stable.

[0040] Please refer to Figure 1 、 6 、7, 8. The present invention provides a technical solution:

[0041] The grouting device 4 includes a sealing body 41 and a grouting body 42. The grouting body 42 is arranged in the grouting body 42. The sealing body 41 includes a fixed pipe 411 and a sealing structure 414. The fixed pipe 411 is fixedly connected to the first steel sleeve 2 at the lower outer side. A fixed frame 412 is fixedly connected in the fixed pipe 411. A spring 413 is fixedly connected to the bottom of the fixed frame 412. The sealing structure 414 is fixedly connected to the bottom of the spring 413. The fixed frame 412 is arranged in a cross shape. The grouting body 42 includes a grouting valve 421 and a mounting frame 424. A limiting ring 423 is fixedly connected to the outer side of the grouting valve 421. A fixed shell 422 is arranged on the outer side of the limiting ring 423. The grouting valve 421 passes through the fixed shell 422. The fixed shell 422 is spirally connected to the fixed pipe 411. A mounting frame 424 is fixedly connected to the lower inner side of the grouting valve 421. The mounting frame 424 The bottom end of the pipe is fixedly connected with a push rod 425, the mounting frame 424 is arranged in a cross shape, the push rod 425 is arranged in the spring 413, and the bottom end of the push rod 425 is arranged in the sealing structure 414. Through this arrangement, the plugging material can be easily poured between the pipe segment and the soil to prevent leakage. The sealing structure 414 includes a connecting block 4141, and the bottom of the connecting block 4141 is fixedly connected with a sealing block 4142, and the bottom of the sealing block 4142 is fixedly connected with a bottom plate 4143. The sealing block 4142 is arranged in a frustum shape, and through this arrangement, the bottom of the fixed pipe can be easily sealed to facilitate grouting. The top of the limiting ring 423 is tightly fitted with the fixed shell 422, and the bottom of the limiting ring 423 is tightly fitted with the fixed pipe 411. The push rod 425 passes through the fixing frame 412. Through this arrangement, the sealing block 4142 can be easily pushed to facilitate grouting.

[0042] See also Figure 1 , 9 , 10, 11, 12, the present invention provides a technical solution:

[0043] The sealing device 5 includes a sealing ring 51, a limiting device 52 and a leak-proof device 54. A fixing block 55 is fixedly connected inside the top of the sealing ring 51, and an air inlet valve 53 is fixedly connected inside the fixing block 55. The outside of the air inlet valve 53 is arranged inside the leak-proof device 54. The outside of the sealing ring 51 is provided with uniformly distributed limiting devices 52. The limiting device 52 includes a fixing plate 541. A fixing screw 543 is arranged inside the fixing plate 541. The bottom of the fixing screw 543 is screwed to the second steel sleeve 3. The bottom of the fixing plate 541 is fixedly connected with a sealing gasket 542. The bottom of the sealing gasket 542 is closely attached to the second steel sleeve 3. The limiting device 52 includes a limiting frame 521. Limiting plates 522 are fixedly connected to the sides of the left and right sides of the limiting frame 521 close to the second steel sleeve 3. A limiting screw 523 is arranged inside the limiting plate 522. One end of the limiting screw 523 is screwed to the second steel sleeve 3. Through this setting, the second steel sleeve 3 arranged on the left can be conveniently sealed, reducing the waste of plugging materials. The air inlet valve 53 penetrates through the sealing gasket 542, and the fixing screw 543 penetrates through the sealing gasket 542. And two fixing screws 543 are arranged as a group on the left and right sides of the air inlet valve 53. Through this setting, it can prevent the material from flowing out through the second steel sleeve 3.

[0044] Workflow: When recycling a shield machine, in order to prevent leakage at the receiving portal, a sealing steel ring is set outside the receiving portal. Then, it is necessary to connect the first steel sleeve 2 and the second steel sleeve 3 to the sealing steel ring outside the receiving portal. At this time, the fittings of the receiving frame 9 are directly placed into the receiving hole. Then, the positioning block 97 set on the top of the positioning plate 93 is inserted into the support rod 94. After that, the support rod 94 and the positioning plate 93 are fixed by the fixing bolts 95 and the fixing nuts 96. Then, the connecting rod 99 is inserted into the through hole 910 opened in the support frame 91. At this time, the insertion plate 982 set in the top cover 981 penetrates through the support frame 91 and the connecting rod 99, and then is placed into the connecting rod 99. At the same time, the positioning rod 984 together with the positioning bolt 985 penetrates through the connecting rod 99 and the top cover 981. After that, the positioning nut 986 is screwed onto the outside of the positioning bolt 985 to fix the connecting rod 99. After the first steel sleeve 2 and the second steel sleeve 3 are assembled on the receiving frame 9, the first steel sleeve 2 set on the left side is fixedly connected to the portal sealing steel ring through the installation bolts. After the first steel sleeve 2 and the second steel sleeve 3 are assembled, at this time, the air inlet valve 53 passes through the second steel sleeve 3 set on the leftmost side. Then, the fixing plate 541 is placed outside the air inlet valve 53. At this time, the fixing screw 543 penetrates through the fixing plate 541, and then the fixing screw 543 is screwed onto the second steel sleeve 3 until the bottom of the sealing gasket 542 is in close contact with the second steel sleeve 3. After that, the fixing cover 6 is fixed to one side of the first steel sleeve 2 set on the right side through the installation bolts. At this time, the fixing frame 412 is fixed to the fixing cover 6 and the ground through the installation screws. The pressure test cover 10 is opened to pour in clear water to detect the sealing performance between the first steel sleeve 2, the second steel sleeve 3, the fixing cover 6 and the sealing steel ring. After the detection is completed, the clear water is discharged. The box body 8 is opened, and then the portal is chiseled, and then the materials are cleaned. The feeding cover 11 is opened, and soil is poured into the first steel sleeve 2 and the second steel sleeve 3. The soil connects the gap between the receiving portal and the first steel sleeve 2 and the second steel sleeve 3. Then, the shield structure enters the first steel sleeve 2 and the second steel sleeve 3. The grouting valve 421 is inserted into the fixed pipe 411. At this time, the push rod 425 is inserted into the connecting block 4141. Then, the fixed shell 422 is sleeved outside the grouting valve 421. The fixed shell 422 is rotated. At this time, the fixed shell 422 is screwed onto the fixed pipe 411 until the bottom of the limit ring 423 is in close contact with the fixed pipe 411. At the same time, the push rod 425 pushes the sealing block 4142 away from the bottom end of the fixed pipe 411 downward. Then, the shield mechanism grouts in the shield hole. At this time, the plugging material injected by the shield mechanism is between the segment and the soil at the receiving portal. At the same time, grouting is carried out through the grouting main body 42, and a large amount of plugging material is injected between the segment and the soil of the first steel sleeve 2. At this time, the plugging materials on both the inner and outer sides of the sealing steel sleeve move towards the sealing steel sleeve at the same time, and the gap inside the receiving portal can be quickly filled to prevent sediment and water leakage. At the same time, air is injected into the sealing ring 51 through the air inlet valve 53. As the air in the air inlet valve 53 increases, the sealing ring 51 gradually expands.The second steel sleeve 3 and the segment are sealed by the sealing ring 51. At this time, the material cannot move towards the second steel sleeve 3. As the material is continuously injected, the material pressure between the segment and the soil gradually increases. Under the action of the pressure, the material enters the soil in the receiving hole. By grouting simultaneously from both sides, the pressure of the plugging material is further increased. At this time, the plugging material can quickly enter the soil to fill the gaps in the soil for plugging to prevent leakage.

[0045] In this article, specific examples are used to elaborate on the principle and implementation mode of the present invention. The description of the above examples is only used to help understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that due to the limitation of literal expression and the objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements, retouches or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, retouches, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. A method for preventing and controlling leakage at the shield tunnel portal during reception, comprising a reinforcement frame (1), a grouting device (4), a sealing device (5) and a reception frame (9), characterized in that: On the left side of the reinforcement frame (1), a fixed cover (6) is fixedly connected. On the other side of the fixed cover (6), a first steel sleeve (2) is installed. On one side of the first steel sleeve (2), a second steel sleeve (3) is installed. There are three second steel sleeves (3) in total. There are two first steel sleeves (2) in total. The two first steel sleeves (2) are respectively arranged on the left and right sides of the three second steel sleeves (3). At the bottom of the second steel sleeve (3), a receiving frame (9) is provided. On the front and rear sides of the left first steel sleeve (2), boxes (8) are fixedly connected. The two first steel sleeves (2) are arranged in parallel on both sides above the receiving frame (9). On the top of the left first steel sleeve (2), a grouting device (4) is installed. On the top of the left second steel sleeve (3), a sealing device (5) is installed. On the top of the middle second steel sleeve (3), a pressure test cover (10) is fixedly connected. On the top of the right second steel sleeve (3), a feeding cover (11) is fixedly connected; The grouting device (4) includes a sealing main body (41) and a grouting main body (42). The grouting main body (42) is arranged inside the grouting main body (42). The sealing main body (41) includes a fixed pipe (411) and a sealing structure (414). The lower part of the outer side of the fixed pipe (411) is fixedly connected to the first steel sleeve (2). Inside the fixed pipe (411), a fixed frame (412) is fixedly connected. At the bottom of the fixed frame (412), a spring (413) is fixedly connected. The bottom end of the spring (413) is fixedly connected to the sealing structure (414). The fixed frame (412) is arranged in a cross shape. The grouting main body (42) includes a grouting valve (421) and an installation frame (424). On the outer side of the grouting valve (421), a limit ring (423) is fixedly connected. Outside the limit ring (423), a fixed shell (422) is provided. The grouting valve (421) penetrates through the fixed shell (422). The fixed shell (422) is spirally connected to the fixed pipe (411). Inside the lower part of the grouting valve (421), an installation frame (424) is fixedly connected. At the bottom end of the installation frame (424), a push rod (425) is fixedly connected. The installation frame (424) is arranged in a cross shape. The push rod (425) is arranged inside the spring (413). The bottom end of the push rod (425) is arranged inside the sealing structure (414); The sealing device (5) includes a sealing ring (51), a limiting device (52) and a leak-proof device (54). A fixing block (55) is fixedly connected inside the top of the sealing ring (51). An intake valve (53) is fixedly connected inside the fixing block (55). The outside of the intake valve (53) is arranged inside the leak-proof device (54). The outside of the sealing ring (51) is provided with evenly distributed limiting devices (52). The limiting device (52) includes a fixing plate (541). A fixing screw (543) is arranged inside the fixing plate (541). The bottom of the fixing screw (543) is in screw connection with the second steel sleeve (3). A sealing gasket (542) is fixedly connected to the bottom of the fixing plate (541). The bottom of the sealing gasket (542) is in close fit with the second steel sleeve (3). The limiting device (52) includes a limiting frame (521). Limiting plates (522) are fixedly connected to the sides of the left and right sides of the limiting frame (521) close to the second steel sleeve (3). A limiting screw (523) is arranged inside the limiting plate (522). One end of the limiting screw (523) is in screw connection with the second steel sleeve (3).

2. A method for preventing and controlling leakage at the shield tunnel portal receiving according to claim 1, characterized in that: The receiving frame (9) includes a support frame (91), a support rod (94) and a positioning device (98). Support plates (92) are fixedly connected to both ends of the support frame (91). A positioning plate (93) is fixedly connected to the top of the support plate (92). A support rod (94) is arranged on the top of the positioning plate (93). Positioning blocks (97) are arranged on the front and rear sides of the bottom of the support rod (94). The bottom of the positioning block (97) is fixedly connected to the positioning plate (93). The side of the support rod (94) close to the first steel sleeve (2) is inclined inward. A fixing bolt (95) is arranged inside the support rod (94). The fixing bolt (95) penetrates through the positioning plate (93). A fixing nut (96) is screwed on the lower side of the outside of the fixing bolt (95). The positioning plate (93) and the support rod (94) are fixedly connected by the fixing bolt (95) and the fixing nut (96). Through holes (910) symmetrically arranged in the front and rear are formed inside the support frame (91). A connecting rod (99) is arranged inside the through holes (910) formed by the support frame (91). A positioning device (98) is arranged outside the connecting rod (99). The support frame (91) is arranged inside the positioning device (98).

3. A method for preventing and controlling leakage at the shield tunnel portal receiving according to claim 2, characterized in that: The positioning device (98) includes a top cover (981) and a positioning rod (984). A plug board (982) is fixedly connected to the inner bottom of the top cover (981). The plug board (982) is arranged inside the support frame (91). The plug board (982) penetrates through the connecting rod (99). Positioning bolts (985) are arranged on the left and right sides inside the top cover (981). A positioning nut (986) is screwed on the upper side of the outside of the positioning bolt (985). The bottom end of the positioning bolt (985) is fixedly connected to a positioning rod (984). The bottom end of the positioning rod (984) is fixedly connected to a bottom rod (983). Two bottom rods (983) are arranged in a group on the left and right sides of the support rod (94).

4. A method for preventing and controlling leakage at the shield tunnel portal receiving area according to claim 1, characterized in that: The sealing structure (414) includes a connecting block (4141). A sealing block (4142) is fixedly connected to the bottom of the connecting block (4141). A bottom plate (4143) is fixedly connected to the bottom of the sealing block (4142). The sealing block (4142) is arranged in a frustum shape.

5. A method for preventing and controlling leakage at the shield tunnel portal reception according to claim 1, characterized in that: The top of the limiting ring (423) is in close fit with the fixed shell (422). The bottom of the limiting ring (423) is in close fit with the fixed pipe (411). The push rod (425) penetrates through the fixed frame (412).

6. A method for preventing and controlling leakage at the shield tunnel portal receiving area according to claim 1, characterized in that: The air inlet valve (53) penetrates through the sealing gasket (542). The fixing screws (543) penetrate through the sealing gasket (542), and two fixing screws (543) are arranged in a group on the left and right sides of the air inlet valve (53).

7. A method for preventing and controlling leakage at the shield tunnel portal receiving area according to any one of claims 1-6, characterized in that, It includes the following steps: Step 1: When recycling the shield machine, in order to prevent leakage at the receiving hole, a sealing steel ring is set outside the receiving hole. Then, the first steel sleeve (2) and the second steel sleeve (3) need to be connected to the sealing steel ring outside the receiving hole. At this time, the accessories of the receiving frame (9) are directly placed into the receiving hole. Then, the positioning block (97) arranged on the top of the positioning plate (93) is inserted into the support rod (94). Then, the support rod (94) and the positioning plate (93) are fixed by the fixing bolt (95) and the fixing nut (96). Then, the connecting rod (99) is inserted into the through hole (910) opened in the support frame (91). At this time, the insertion plate (982) arranged in the top cover (981) penetrates through the support frame (91) and the connecting rod (99), and then is placed into the connecting rod (99). At the same time, the positioning rod (984) together with the positioning bolt (985) penetrates through the connecting rod (99) and the top cover (981). Then, the positioning nut (986) is screwed on the outside of the positioning bolt (985) to fix the connecting rod (99). After that, the first steel sleeve (2) and the second steel sleeve (3) are assembled on the receiving frame (9). Then, the first steel sleeve (2) arranged on the left side is fixedly connected to the hole sealing steel ring through the installation bolt; Step 2: After the first steel sleeve (2) and the second steel sleeve (3) are assembled, at this time, the air inlet valve (53) passes through the second steel sleeve (3) arranged on the leftmost side. Then, the fixing plate (541) is placed outside the air inlet valve (53). At this time, the fixing screws (543) penetrate through the fixing plate (541). Then, the fixing screws (543) are screwed with the second steel sleeve (3) until the bottom of the sealing gasket (542) is in close fit with the second steel sleeve (3). After that, the fixed cover (6) is fixed to one side of the first steel sleeve (2) arranged on the right side through the installation bolt. At this time, the fixed frame (412) is fixed to the fixed cover (6) and the ground through the installation screws; Step 3: Open the pressure test cover (10) and pour in clear water to detect the sealing performance between the first steel sleeve (2), the second steel sleeve (3), the fixed cover (6) and the sealing steel ring. After the detection, drain the clear water, open the box body (8), then chisel the hole, and then clean the materials. Open the blanking cover (11) and pour soil into the first steel sleeve (2) and the second steel sleeve (3). The soil connects the gap between the receiving hole and the first steel sleeve (2) and the second steel sleeve (3), and then the shield structure tunnels into the first steel sleeve (2) and the second steel sleeve (3). Step 4: Insert the grouting valve (421) into the fixed pipe (411). At this time, the push rod (425) is inserted into the connecting block (4141), and then the fixed shell (422) is sleeved outside the grouting valve (421). Rotate the fixed shell (422). At this time, the fixed shell (422) is screwed to the fixed pipe (411) until the bottom of the limit ring (423) is closely attached to the fixed pipe (411). At the same time, the push rod (425) pushes the sealing block (4142) away from the bottom end of the fixed pipe (411). Then the shield mechanism grouts in the shield hole. At this time, the plugging material injected by the shield mechanism is between the segment and the soil at the receiving hole. At the same time, grouting is carried out through the grouting main body (42), and a large amount of plugging material is injected into the soil between the segment and the first steel sleeve (2). At this time, the plugging materials on both sides of the sealing steel sleeve move towards the sealing steel sleeve at the same time, which can quickly fill the gap in the receiving hole to prevent sediment and water leakage. At the same time, air is injected into the sealing ring (51) through the air inlet valve (53). As the air in the air inlet valve (53) increases, the sealing ring (51) gradually expands, and the gap between the second steel sleeve (3) and the segment is sealed by the sealing ring (51). At this time, the material cannot move towards the second steel sleeve (3). As the material is continuously injected, the pressure of the material between the segment and the soil gradually increases. Under the action of the pressure, the material enters the soil in the receiving hole. By grouting from both sides at the same time, the pressure of the plugging material is further increased. At this time, the plugging material can quickly enter the soil to fill the gaps in the soil for plugging to prevent leakage.

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