A tunnel segment repair structure and chemical grouting repair method

Abstract

The application belongs to the technical field of pipe jacking construction. Disclosed is a tunnel segment repair structure and chemical grouting repair method for repairing a broken pipe body, comprising: an arch frame arranged in the pipe body and having a gap with the inner wall of the pipe body, the gap being grouted to form a first grouting layer; and a plurality of reinforcing units fixed on the arch frame and the pipe body, one end of the reinforcing unit being located in the arch frame and the other end of the reinforcing unit extending out of the pipe body and having a flaring member, the flaring member being grouted out of the pipe body to form a second grouting layer. The application can realize the connection and fixation of the arch frame and the pipe body through the reinforcing unit, form the first grouting layer by grouting between the arch frame and the pipe body, and form the second grouting layer outside the pipe body through the reinforcing unit, so that the broken pipe body forms an integral structure, which is convenient and simple to construct and has good repair effect.

Description

Technical Field

[0001] This invention belongs to the field of pipe jacking construction technology, and particularly relates to a method for repairing tunnel segments and chemical grouting. Background Technology

[0002] Pipe jacking, also known as trenchless construction, is a pipeline installation technology that involves little or no excavation. The process involves using jacking equipment in a working shaft to push the pipeline into the ground at a designed slope, and then removing the excavated soil. Once one section of pipeline is completely driven into the ground, the next section is jacked in.

[0003] However, in actual construction, due to human factors or other unknown factors, the jacking pipe may break, which will prevent the jacking construction from continuing. Therefore, it is necessary to repair the broken jacking pipe. However, jacking construction is characterized by large-diameter pipes and deep-buried working wells. Using traditional concrete pipe repair methods is not only complicated and difficult, but also the repair effect is not ideal.

[0004] Therefore, a method for repairing tunnel segments and chemical grouting is provided to solve the above problems. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a structure for repairing tunnel segments and a chemical grouting repair method. This method enables the connection and fixation of the arch frame and the tunnel body through a reinforcement unit, the formation of a first grouting layer between the arch frame and the tunnel body through grouting, and the formation of a second grouting layer outside the tunnel body through the reinforcement unit. This results in the formation of a unified structure for the ruptured tunnel body. The construction is convenient and simple, and the repair effect is good.

[0006] To achieve the above objectives, the present invention provides a tunnel segment repair structure for repairing ruptured tunnel segments, comprising:

[0007] An arch frame is arranged inside the pipe and has a gap between it and the inner wall of the pipe, and grout is injected into the gap to form a first grout layer;

[0008] Multiple reinforcement units are inserted and fixed on the arch frame and the pipe body. One end of the reinforcement unit is located inside the arch frame, and the other end of the reinforcement unit extends out of the pipe body and has an opening member. The opening member injects grout into the outside of the pipe body to form a second grouting layer.

[0009] The reinforcement unit has a contracted state and an open state. In the contracted state, the reinforcement unit passes through the arch frame and the pipe body. In the open state, the opening member of the reinforcement unit opens outside the pipe body and grout is injected.

[0010] Furthermore, it also includes multiple gaskets, which are circumferentially fixed to the inner wall of the tube to form a gap between the inner wall of the tube and the outer wall of the arch frame.

[0011] Furthermore, the reinforcement unit includes: a sleeve, which is inserted through and fixed in the drill hole on the pipe body and the arch frame, and is adapted to the drill hole and threadedly connected;

[0012] The grouting rod is inserted into the sleeve and one end is connected to the opening member;

[0013] A sliding table is slidably connected to the grouting rod and located on the side of the sleeve near the opening member. When the sleeve switches from the contracted state to the open state, it is configured to limit the sliding table so that when the grouting rod moves toward the arch frame, the sliding table drives the opening member to open.

[0014] Furthermore, it also includes a fixing sleeve, which is threaded onto the grouting rod and located on the side of the sleeve away from the opening member. The fixing sleeve is rotatably engaged with the sleeve so that the grouting rod moves toward the arch frame.

[0015] Furthermore, the opening member includes: a plurality of first support rods arranged circumferentially at the end of the grouting rod, and one end of which is hinged to the end of the grouting rod;

[0016] Multiple second support rods are provided, matching the number of the first support rods. One end of each second support rod is hinged to the middle of the first support rod, and the other end is hinged to the slide table.

[0017] A flexible fiber cloth is fixed between two adjacent first support rods and is folded in the contracted state and unfolded in the open state.

[0018] Furthermore, it also includes: a connecting end, fixed to one end of the grouting rod, with its internal cavity communicating with the grout outlet end of the grouting rod.

[0019] Multiple guide rods are fixed to the outer wall of the connecting end. One end of the first support rod is sleeved on the guide rod and rotates with it. Multiple grout passage holes are provided on the outer wall of the guide rod. The grout passage holes communicate with the cavity through the grouting channel on the side wall of the connecting end. The grout passage holes communicate with the grouting channel inside the first support rod so that grout exits from the end of the first support rod.

[0020] A chemical grouting repair method is used for the above-mentioned tunnel segment repair structure. The repair steps include:

[0021] An arch frame is constructed inside the ruptured pipe to create a gap between the inner wall of the pipe and the outer wall of the arch frame.

[0022] Reinforcing units are installed on the pipe body and arch frame. The opening element on the reinforcing unit extends out of the pipe body and is driven to open.

[0023] Grout is injected into the gap to form the first grout layer;

[0024] Grouting is injected into the reinforcement unit to form a second grouting layer outside the pipe body.

[0025] Furthermore, when grouting is injected into the gap to form the first grouting layer, the inner wall of the pipe is provided with a plurality of bottom grouting holes, a plurality of middle grouting holes, and a plurality of top grouting holes along the jacking direction, and grout is injected into the bottom grouting holes, the middle grouting holes, and the top grouting holes in sequence. A plurality of venting holes are opened on the side of the pipe away from the jacking direction.

[0026] Furthermore, the sequential grouting direction of the bottom grouting holes is opposite to the jacking direction of the pipe body, and at least one bottom monitoring hole is provided between two adjacent bottom grouting holes. The bottom monitoring hole near the bottom grouting hole is configured to discharge grout to determine that the bottom grouting hole has been grouted.

[0027] The grouting direction of the intermediate grouting holes is opposite to the jacking direction of the pipe body. A intermediate monitoring hole is provided between two adjacent intermediate grouting holes. The intermediate monitoring hole near the intermediate grouting hole is configured to discharge grout to determine that the grouting of the intermediate grouting hole is completed.

[0028] The three adjacent top-layer grouting holes form a group. The top-layer grouting hole closest to the depth of the pipe body in the jacking direction is configured to be grouted first, and grouting stops after grout comes out of the middle top-layer grouting hole. Then, the top-layer grouting hole furthest from the depth of the pipe body in the jacking direction is configured to be grouted, and grouting stops after grout comes out of the middle top-layer grouting hole. Finally, grouting is performed on the middle top-layer grouting hole so that the grouting pressure reaches the preset pressure and then grouting stops.

[0029] Furthermore, the grout for the first grouting layer is a modified silicate grouting reinforcement material, which has a temperature different from the environment. Grout is injected into the gap to form the first grouting layer, and the grouting status is determined by measuring the temperature of the inner wall of the arch frame.

[0030] Compared with the prior art, the present invention has the following advantages and technical effects:

[0031] The arch frame and the pipe body are connected and fixed by the reinforcement unit. A first grouting layer is formed between the arch frame and the pipe body by grouting, and a second grouting layer is formed outside the pipe body by the reinforcement unit, so that the ruptured pipe body forms an integral structure. The construction is convenient and simple, and the repair effect is good. Attached Figure Description

[0032] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 A 3D view of the repaired structure;

[0034] Figure 2 for Figure 1 The front view;

[0035] Figure 3 This is a schematic diagram showing the positional relationship between the reinforcement unit and the pipe body;

[0036] Figure 4 A 3D view of the reinforced unit in its open state;

[0037] Figure 5 This is a schematic diagram showing the connection between the sleeve and the grouting rod;

[0038] Figure 6 A three-dimensional view of the reinforced unit in its contracted state;

[0039] Figure 7 This is a schematic diagram showing the connection relationship between the first support rod and the connecting end;

[0040] Figure 8 This is a schematic diagram showing the distribution of grouting locations;

[0041] The components are as follows: 1. Pipe body; 2. Arch frame; 201. Cylinder body; 202. Annular reinforcing rib; 203. Straight reinforcing rib; 3. First grouting layer; 4. Reinforcement unit; 401. Sleeve; 402. Grouting rod; 403. Slide table; 404. First support rod; 405. Second support rod; 406. Flexible fiber cloth; 407. Connecting end; 408. Grout guide rod; 409. Grout passage hole; 410. Grouting channel; 411. Grout guide channel; 5. Second grouting layer; 6. Gasket; 7. Fixing sleeve; 8. Bottom grouting hole; 9. Middle grouting hole; 10. Top grouting hole; 11. Vent hole; 12. Bottom monitoring hole; 13. Middle monitoring hole; 14. Top monitoring hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figures 1-8 The present invention provides a tunnel segment repair structure for repairing a ruptured tunnel segment 1, comprising: an arch frame 2 arranged inside the tunnel segment 1 and having a gap between it and the inner wall of the tunnel segment 1, wherein grout is injected into the gap to form a first grout layer 3.

[0045] Specifically, the arch frame 2 is installed on the inner wall of the pipe body 1, which can serve as an internal support for the pipe body 1. Grouting is injected between the arch frame 2 and the pipe body 1 to form a first grouting layer 3. The first grouting layer 3 is used to make the pipe body 1 and the arch frame 2 form an integral structure. At the same time, the first grouting layer 3 can repair and reinforce the broken pipe body 1.

[0046] Specifically, the arch frame 2 includes a cylinder 201. The gap formed between the outer wall of the cylinder 201 and the inner wall of the pipe 1 is used for grouting to form a first grouting layer 3. The inner wall of the cylinder 201 is fixed with a plurality of annular reinforcing ribs 202 and straight reinforcing ribs 203 along the axial direction.

[0047] Among them, the arch frame 2 is preferably a steel structure.

[0048] Multiple reinforcing units 4 are inserted and fixed on the arch frame 2 and the pipe body 1. One end of the reinforcing unit 4 is located inside the arch frame 2, and the other end of the reinforcing unit 4 extends out of the pipe body 1 and has an opening member. The opening member injects grout into the outside of the pipe body 1 to form a second grouting layer 5. The reinforcing unit 4 has a contracted state and an open state. In the contracted state, the reinforcing unit 4 passes through the arch frame 2 and the pipe body 1. In the open state, the opening member of the reinforcing unit 4 opens outside the pipe body 1 and injects grout.

[0049] Specifically, during the installation of reinforcement unit 4, reinforcement unit 4 is initially in a contracted state, i.e., the opening member is contracted. The cross-sectional diameter of reinforcement unit 4 is relatively small. An unbroken area of ​​pipe body 1 is selected, and holes are drilled in the arch frame 2 and pipe body 1 relative to this area. Reinforcement unit 4 is passed through the drilled holes, and the arch frame 2 and pipe body 1 are fixed. At the same time, after the opening member extends out of pipe body 1, it is driven to open, and the cross-sectional diameter of the opening member increases, making it impossible for it to detach from the drilled holes. After the opening member opens, grout is injected into the grout inlet end of reinforcement unit 4, and the grout flows out from the opening member to form the second grouting layer 5.

[0050] The presence of the reinforcement unit 4 not only enables the fixing of the arch frame 2 and the pipe body 1, but also serves as a grouting channel. Grout is injected into the outside of the pipe body 1 through the reinforcement unit 4, and multiple reinforcement units 4 are connected to form a whole to improve the repair effect of the pipe body 1.

[0051] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3It also includes multiple gaskets 6, which are circumferentially fixed on the inner wall of the tube body 1 to form a gap between the inner wall of the tube body 1 and the outer wall of the arch frame 2.

[0052] Specifically, before installing the arch frame 2, a shim 6 is fixed to the inner wall of the pipe body 1 or the outer wall of the arch frame 2. The shim 6 is used to control the distance between the inner wall of the pipe body 1 and the outer wall of the arch frame 2 in order to reserve a gap.

[0053] The thickness of the gasket 6 is 4-8cm, preferably 5cm.

[0054] In this embodiment, refer to Figure 4 , Figure 5 , Figure 6 The reinforcement unit 4 includes: a sleeve 401, which is inserted through and fixed in the drill hole on the pipe body 1 and the arch frame 2, and is threadedly connected to the drill hole; a grouting rod 402, which is inserted inside the sleeve 401 and one end is connected to the opening member; and a slide 403, which is slidably connected to the grouting rod 402 and located on the side of the sleeve 401 close to the opening member. When switching from the contracted state to the open state, the sleeve 401 is configured as the limiting slide 403 so that when the grouting rod 402 moves toward the arch frame 2, the slide 403 drives the opening member to open.

[0055] Specifically, the cross-sectional diameter of the sleeve 401 is larger than that of the grouting rod 402, and the inner diameter of the drill hole is adapted to the sleeve 401. When installing the reinforcement unit 4, the grouting rod 402 is inserted into the sleeve 401. Then, the contracted opening member, together with the grouting rod 402, is passed through the drill hole. The sleeve 401 is placed into the drill hole and rotated so that the pipe body 1 and the arch frame 2 are fixed by the sleeve 401. Then, the grouting rod 402 is manually pulled to move towards the center of the arch frame 2. The grouting rod 402 drives the opening member to move. Since the sleeve 401 is relatively fixed, the sleeve 401 limits the slide table 403. The slide table 403 is relatively stationary, while the grouting rod 402 moves relative to the slide table 403, so that the opening member opens under the action of the slide table 403.

[0056] In this embodiment, refer to Figure 5 It also includes a fixing sleeve 7, which is threadedly connected to the grouting rod 402 and located on the side of the sleeve 401 away from the opening member. The fixing sleeve 7 is rotatably engaged with the sleeve 401 so that the grouting rod 402 moves toward the arch frame 2.

[0057] Specifically, when the opening component needs to be opened, the fixing sleeve 7 is fitted onto the grouting rod 402. By driving the fixing sleeve 7 to rotate relative to the grouting rod 402, the fixing sleeve 7 moves along the grouting rod 402. Since the sleeve 401 limits the fixing sleeve 7, the fixing sleeve 7 drives the grouting rod 402 to move closer to the center of the arch frame 2 during rotation. At the same time, when the fixing sleeve 7 finishes rotating, it can limit the grouting rod 402. And by controlling the moving distance of the grouting rod 402, prestress can be applied to the opening component.

[0058] In this embodiment, refer to Figure 4 , Figure 5 The opening component includes: a plurality of first support rods 404 arranged circumferentially at the end of the grouting rod 402, with one end hinged to the end of the grouting rod 402; a plurality of second support rods 405 matching the number of first support rods 404, with one end of the second support rod 405 hinged to the middle of the first support rod 404 and the other end hinged to the slide table 403; and a flexible fiber cloth 406 fixed between two adjacent first support rods 404, folded in the contracted state and unfolded in the open state.

[0059] Specifically, after the slide table 403 is limited by the sleeve 401, when the grouting rod 402 moves, the distance between the slide table 403 and the end of the grouting rod 402 connected to the first support rod 404 decreases. Under the action of the first support rod 404 and the second support rod 405, the first support rod 404 opens, which can increase the coverage area of ​​the opening member on the outer wall of the pipe body 1.

[0060] In the open state, the first support rod 404 can be used as a grout guiding structure to allow the grout to diffuse and connect adjacent open members. At the same time, the first support rod 404 and the second support rod 405 can be used as the skeleton of the second grouting layer 5 to improve the strength of the second grouting layer 5.

[0061] The flexible fiber cloth 406 can be configured according to the actual situation. In some cases, only the first support rod 404 and the second support rod 405 need to be configured.

[0062] In this embodiment, refer to Figure 5 , Figure 6 , Figure 7 It also includes: a connecting end 407, fixed to one end of the grouting rod 402, with its internal cavity connected to the grout outlet end of the grouting rod 402; multiple guide rods 408, fixed to the outer wall of the connecting end 407; one end of the first support rod 404 is sleeved on the guide rod 408 and rotates with the guide rod 408; multiple grout passage holes 409 are provided on the outer wall of the guide rod 408; the grout passage holes 409 are connected to the cavity through the grouting channel 410 on the side wall of the connecting end 407; and the grout passage holes 409 are connected to the guide channel 411 inside the first support rod 404, so that grout exits from the end of the first support rod 404.

[0063] Specifically, a guide rod 408 is provided on the connecting end 407 as a pivot for the first support rod 404, so that the first support rod 404 can rotate relative to the guide rod 408. The grout inlet end of the grouting rod 402 is located inside the arch frame 2. By injecting grout into the grouting rod 402, the grout moves along the grouting rod 402 and enters the cavity of the connecting end 407. Then, it enters different guide rods 408 through different grouting channels 410 from the cavity, and is then discharged from the first support rod 404 through the grout passage 409 and the grouting channel 411.

[0064] In some cases, in order to improve the slurry discharge efficiency, multiple holes for slurry discharge are provided on the side wall of the first support rod 404.

[0065] A chemical grouting repair method is used for the above-mentioned tunnel segment repair structure. The repair steps include:

[0066] S1. Construct an arch frame 2 inside the ruptured pipe body 1 so that a gap is created between the inner wall of the pipe body 1 and the outer wall of the arch frame 2.

[0067] Specifically, before construction, the ruptured pipe body 1 is first identified, and then a gasket 6 and an arch frame 2 are placed inside the pipe body 1, so that there is a gap between the outer wall of the arch frame 2 and the inner wall of the pipe body 1.

[0068] S2. Install the reinforcing unit 4 on the pipe body 1 and the arch frame 2. The opening member on the reinforcing unit 4 extends out of the pipe body 1 and is driven to open.

[0069] Specifically, a hole is drilled in the unbroken area of ​​the pipe body 1. After drilling, the grouting rod 402 is inserted into the sleeve 401. Then, the retracted first support rod 404 and second support rod 405, together with the grouting rod 402, are passed through the drill hole. The sleeve 401 is placed into the drill hole and rotated so that the pipe body 1 and the arch frame 2 are fixed by the sleeve 401. Then, a fixing sleeve 7 is fitted onto the grouting rod 402 and the fixing sleeve 7 is driven to rotate, so that the grouting rod 402 moves towards the center of the arch frame 2. The grouting rod 402 drives the first support rod 404 and the second support rod 405 to open.

[0070] S3. Grout is injected into the gap to form the first grouting layer 3.

[0071] Specifically, when grouting into the gap, templates are arranged at both ends of the gap to form a grouting space, and then grout is injected into the grouting space to form the first grouting layer 3.

[0072] S4. Grouting is injected into the reinforcing unit 4 to form a second grouting layer 5 outside the pipe body 1.

[0073] Specifically, after the first grouting layer 3 is grouted, grout is injected into the grouting rod 402, so that the grout is discharged from the pipe body 1 through the first support rod 404 to form the second grouting layer 5.

[0074] In this embodiment, when grout is injected into the gap to form the first grouting layer 3, the inner wall of the pipe body 1 is provided with a plurality of bottom grouting holes 8, a plurality of middle grouting holes 9, and a plurality of top grouting holes 10 along the jacking direction, and grout is injected into the bottom grouting holes 8, the middle grouting holes 9, and the top grouting holes 10 in sequence. A plurality of venting holes 11 are opened on the side of the pipe body 1 away from the jacking direction.

[0075] Specifically, during the construction of the first grouting layer 3, in order to ensure the construction effect, multiple vent holes 11 are arranged on the side of the pipe body 1 away from the jacking direction, that is, the side of the pipe body 1 close to the shaft. When grouting, the bottom layer grouting is first carried out through the bottom grouting hole 8. After the grouting is completed, the middle layer grouting is carried out through the middle layer grouting hole 9, and then the top layer grouting is carried out through the top layer grouting hole 10.

[0076] In this embodiment, the sequential grouting direction of the bottom grouting holes 8 is opposite to the jacking direction of the pipe body 1. At least one bottom monitoring hole 12 is provided between two adjacent bottom grouting holes 8. The bottom monitoring hole 12 near the bottom grouting hole 8 is configured to discharge grout to determine that the bottom grouting hole 8 has been grouted.

[0077] The grouting direction of the intermediate grouting holes 9 is opposite to the jacking direction of the pipe body 1. A middle layer monitoring hole 13 is provided between two adjacent intermediate grouting holes 9. The middle layer monitoring hole 13 near the intermediate grouting hole 9 is configured to discharge grout to determine that the grouting of the intermediate grouting hole 9 is completed.

[0078] Three adjacent top-level grouting holes 10 form a group. The top-level grouting hole 10 closest to the depth of the pipe body 1 in the jacking direction is configured to be grouted first, and grouting stops after the middle top-level grouting hole 10 produces grout. Then, the top-level grouting hole 10 furthest from the depth of the pipe body 1 in the jacking direction is configured to be grouted, and grouting stops after the middle top-level grouting hole 10 produces grout. Finally, grouting is performed on the middle top-level grouting hole 10 so that the grouting pressure reaches the preset pressure and then grouting stops.

[0079] In one specific embodiment of the present invention, reference is made to... Figure 8 When constructing the first grouting layer 3, grout is injected into the bottom grouting hole 8 at point 10. After a small amount of grout is discharged from the bottom monitoring holes 12 at points 17 and 11, grouting into the bottom grouting hole 8 at point 10 is stopped. Then, grout is injected into the bottom grouting hole 8 at point 12. After a small amount of grout is discharged from the bottom monitoring holes 12 at points 4 and 7, grouting into the bottom grouting hole 8 at point 12 is stopped. Then, grout is injected into the bottom grouting hole 8 at point 1. After the grout is discharged from the vent hole 11 at the bottom layer, grouting into the bottom grouting hole 8 at point 1 is stopped.

[0080] Subsequently, grouting was performed on the intermediate grouting hole 9 at point 6. Grouting was stopped at the intermediate monitoring holes 13 at points 3 and 9 after grout was discharged from these holes. Similarly, grouting was performed on the intermediate grouting hole 9 at point 5. Grouting was stopped at the intermediate grouting hole 9 at point 5 after grout was discharged from the intermediate monitoring holes 13 at points 2 and 8.

[0081] Finally, grout is injected into the top grouting hole 10 at point 14. After a small amount of grout is discharged from the top grouting hole 10 at point 16, grouting into the top grouting hole 10 at point 14 is stopped. Then, grout is injected into the top grouting hole 10 at point 13. After grout is discharged from the top grouting hole 10 at point 16, grouting into the top grouting hole 10 at point 13 is stopped. Finally, grout is injected into the top grouting hole 10 at point 16. Grouting is stopped after the grouting pressure is increased to the predetermined pressure.

[0082] Furthermore, a top-level monitoring hole 14 at point 15 is provided between the top-level grouting hole 10 at point 16 and the top-level grouting hole 10 at point 14.

[0083] The top monitoring hole 14 faces downwards. Therefore, when the grout is discharged from the top monitoring hole 14 at point 15, the top void is still not fully grouted. Therefore, grouting needs to continue until the grout is discharged from the top grouting hole 10 at point 16.

[0084] In this embodiment, the grouting slurry of the first grouting layer 3 is a modified silicate grouting reinforcement material. The modified silicate grouting reinforcement material has a temperature different from the environment. Grouting is injected into the gap to form the first grouting layer 3. The grouting situation is determined by measuring the temperature of the inner wall of the arch frame 2.

[0085] Specifically, the modified silicate grouting reinforcement material has a higher medium density than water, does not react with water, and does not foam. During the grouting process, the modified silicate grouting reinforcement material is used to squeeze water out of the voids.

[0086] Meanwhile, the material solidifies quickly, so in the actual grouting process, its grout flow direction is set in an arc shape, and therefore it needs to be used in conjunction with the grouting steps.

[0087] The grout has a certain temperature, which can be determined by manually touching it or by measuring the temperature of the inner wall of the arch frame 2 with a temperature gun, so as to determine the filled and unfilled areas of the grout and thus judge the grouting effect.

[0088] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A structure for repairing tunnel segments, used to repair ruptured segments (1), characterized in that: include: An arch frame (2) is arranged inside the pipe body (1) and a gap is provided between it and the inner wall of the pipe body (1). Grout is injected into the gap to form a first grouting layer (3). Multiple reinforcing units (4) are inserted and fixed on the arch frame (2) and the pipe body (1). One end of the reinforcing unit (4) is located inside the arch frame (2), and the other end of the reinforcing unit (4) extends out of the pipe body (1) and has an opening member. The opening member injects grout into the outside of the pipe body (1) to form a second grouting layer (5). The reinforcement unit (4) has a contracted state and an open state. In the contracted state, the reinforcement unit (4) passes through the arch frame (2) and the pipe body (1). In the open state, the opening member of the reinforcement unit (4) opens outside the pipe body (1) and is grouted. It also includes multiple gaskets (6) that are circumferentially fixed on the inner wall of the tube (1) to form a gap between the inner wall of the tube (1) and the outer wall of the arch (2); The reinforcement unit (4) includes: a sleeve (401) that passes through and is fixed in the drill hole on the pipe body (1) and the arch frame (2), and is adapted to the drill hole and threadedly connected; The grouting rod (402) is inserted into the sleeve (401) and one end is connected to the opening member; A sliding table (403) is slidably connected to the grouting rod (402) and located on the side of the sleeve (401) near the opening member. When the contracted state is switched to the open state, the sleeve (401) is configured to limit the sliding table (403) so that when the grouting rod (402) moves toward the arch frame (2), the sliding table (403) drives the opening member to open. It also includes a fixing sleeve (7), which is threaded onto the grouting rod (402) and located on the side of the sleeve (401) away from the opening member. The fixing sleeve (7) is rotatably engaged with the sleeve (401) so that the grouting rod (402) moves toward the arch frame (2). The opening member includes: a plurality of first support rods (404) arranged circumferentially at the end of the grouting rod (402), and one end of which is hinged to the end of the grouting rod (402); Multiple second support rods (405) are provided, matching the number of first support rods (404). One end of each second support rod (405) is hinged to the middle of the first support rod (404), and the other end is hinged to the slide (403). A flexible fiber cloth (406) is fixed between two adjacent first support rods (404) and is folded in the contracted state and unfolded in the open state; It also includes: a connecting end (407), fixed to one end of the grouting rod (402), and the internal cavity of which is connected to the grout outlet end of the grouting rod (402). Multiple guide rods (408) are fixed to the outer wall of the connecting end (407). One end of the first support rod (404) is sleeved on the guide rod (408) and rotates with the guide rod (408). Multiple grout passage holes (409) are opened on the outer wall of the guide rod (408). The grout passage holes (409) are connected to the cavity through the grouting channel (410) on the side wall of the connecting end (407). The grout passage holes (409) are connected to the grouting channel (411) in the first support rod (404) so ​​that grout exits from the end of the first support rod (404).

2. A chemical grouting repair method for constructing the tunnel segment repair structure as described in claim 1, characterized in that: The repair steps include: An arch frame (2) is constructed inside the ruptured pipe (1) so that a gap is provided between the inner wall of the pipe (1) and the outer wall of the arch frame (2); Reinforcing units (4) are installed on the pipe body (1) and the arch frame (2). The opening member on the reinforcing unit (4) extends out of the pipe body (1) and is driven to open. Grout is injected into the gap to form the first grouting layer (3); Grouting is injected into the reinforcement unit (4) to form a second grouting layer (5) outside the pipe body (1).

3. The chemical grouting repair method according to claim 2, characterized in that: When grout is injected into the gap to form the first grouting layer (3), the inner wall of the pipe body (1) is provided with a plurality of bottom grouting holes (8), a plurality of middle grouting holes (9), and a plurality of top grouting holes (10) along the jacking direction, and grout is injected into the bottom grouting holes (8), the middle grouting holes (9), and the top grouting holes (10) in sequence. A plurality of venting holes (11) are opened on the side of the pipe body (1) away from the jacking direction.

4. The chemical grouting repair method according to claim 3, characterized in that: The grouting direction of the bottom grouting holes (8) is opposite to the jacking direction of the pipe body (1). At least one bottom monitoring hole (12) is provided between two adjacent bottom grouting holes (8). The bottom monitoring hole (12) near the bottom grouting hole (8) is configured to discharge grout to determine that the bottom grouting hole (8) has been grouted. The grouting direction of the intermediate grouting holes (9) is opposite to the jacking direction of the pipe body (1). A middle layer monitoring hole (13) is provided between two adjacent intermediate grouting holes (9). The middle layer monitoring hole (13) near the intermediate grouting hole (9) is configured to discharge grout to determine that the grouting of the intermediate grouting hole (9) is completed. Three adjacent top-level grouting holes (10) form a group. The top-level grouting hole (10) closest to the depth of the pipe body (1) in the jacking direction is configured to be grouted first, and grouting stops after the middle top-level grouting hole (10) produces grout. Then, the top-level grouting hole (10) furthest away from the depth of the pipe body (1) in the jacking direction is configured to be grouted, and grouting stops after the middle top-level grouting hole (10) produces grout. Finally, grouting is performed on the middle top-level grouting hole (10) so that the grouting pressure reaches the preset pressure and then grouting stops.

5. The chemical grouting repair method according to claim 4, characterized in that: The grouting slurry of the first grouting layer (3) is a modified silicate grouting reinforcement material. The modified silicate grouting reinforcement material has a temperature different from the environment. Grout is injected into the gap to form the first grouting layer (3). The grouting condition is determined by measuring the temperature of the inner wall of the arch frame (2).

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