Connecting channel reinforcing structure
The communication channel reinforcement structure addresses the challenges of high costs and ineffective water and sand prevention in subway tunnel construction by using a triangular reinforcement system with anchor cables and concrete partitions, enhancing stability and preventing gushing.
Patent Information
- Application Number
- CN202420667874.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Traditional construction methods for connecting passages in subway tunnels with water and sand-rich soil layers face challenges such as high costs, long durations, and ineffective water and sand prevention, especially due to the complexity of freezing methods and the difficulty of constructing horizontal pipe grids.
A communication channel reinforcement structure comprising horizontal and oblique reinforcements, including anchor cables and concrete partitions, forming a triangular structure with a water-stop curtain, and vertical reinforcements to create a closed advance support system, enhancing stability and preventing water and sand gushing.
The structure effectively strengthens the soil layer above the connecting channel, reducing water and sand gushing occurrences by minimizing untensioned soil layers and forming a stable, reinforced triangular structure with a water-stop curtain.
Smart Images
Figure CN222184773U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel construction, and specifically relates to a communication channel reinforcement structure. Background Art
[0002] The connecting passage is a horizontal passage set up between two subway tunnels, which plays the role of safe evacuation of passengers, tunnel drainage, fire prevention and fire fighting.
[0003] In the connecting channel, due to the geological structure of the soil layer rich in water and sand, it is easy to cause water, sand and collapse quality accidents during the construction process. For the connecting channel rich in water and sand layers, a traditional construction method is the "freezing method". The freezing method takes a long time to freeze, and often because the freezing method has strict requirements on freezing, freezing failure cases occur from time to time, and the construction cost is very high. There is also a traditional method of doing mixing pile construction from the top of the connecting road to the bottom. If there is a highway above the connecting channel, a temporary fence must be built to affect normal traffic. Secondly, the top of the connecting channel is often buried more than 20 meters deep, and the cost of making mixing piles is high and the construction period is also long; another traditional method is to construct a "pipe shed" above the temporary support of the connecting channel. Because the pipe grid is generally constructed horizontally, and because the position of the pipe grid is close to the top of the tunnel, it is difficult to construct the horizontal guide hole, the operating space is cramped, and the construction effect of the pipe grid cannot be guaranteed. In addition, there is no sufficient fulcrum at the other end of the pipe shed, and the pipe shed is only a lifting force, which cannot block the water and sand from above. Utility Model Content
[0004] The utility model aims to provide a communication channel reinforcement structure which is convenient to construct and has strong safety performance.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a connecting channel reinforcement structure, a horizontal reinforcement for reinforcing the top soil layer of the connecting channel is provided between the two ends of the connecting channel, an oblique reinforcement for reinforcing the soil layer above the connecting channel is provided above the connecting channel, the horizontal reinforcement and the oblique reinforcement are both located in the soil layer outside the connecting channel, the two ends of the connecting channel are connected to the main tunnel, the interior of the main tunnel is covered with tunnel segments, and the tunnel segments are provided with support cross braces connected to the oblique reinforcement and the horizontal reinforcement respectively, the support cross braces are divided into upper cross braces, lower cross braces and top cross braces, the upper cross brace is located The upper cross brace is located above the lower cross brace, and the upper cross brace is located below the top cross brace. The horizontal reinforcement includes horizontal anchor cables and horizontal concrete partitions. The oblique reinforcement includes oblique anchor cables and oblique concrete partitions. Both ends of the horizontal anchor cables are connected to the upper cross braces on both sides, and the horizontal concrete partitions are connected to the upper cross braces on both sides. The ends of the oblique anchor cables are connected to the upper cross braces, and the oblique concrete partitions are connected to the top cross brace. The oblique anchor cables and the oblique concrete partitions are evenly arranged along the support cross brace, and the oblique anchor cables on the left and right sides are staggered with each other, and the oblique concrete partitions on the left and right sides are staggered with each other.
[0006] The horizontal anchor cable is sheathed with a horizontal sleeve, and the two ends of the horizontal sleeve are connected to the lower cross braces on both sides. The oblique anchor cable is sheathed with an oblique sleeve, and the end of the oblique sleeve is connected to the upper cross brace.
[0007] The end of the oblique anchor cable is provided with a cement slurry section located in the soil layer, and the other end of the oblique anchor cable is located outside the upper cross brace.
[0008] An isolation frame is provided between the oblique casing and the soil layer.
[0009] The support cross brace also includes vertical supports, which are arranged at both ends of the lower cross brace, and vertical reinforcements are arranged between the vertical supports at both ends of the communication channel.
[0010] The vertical reinforcement includes side concrete partitions and side anchor cables. The two ends of the side concrete partitions are connected to the vertical supports at the two ends of the connecting channel. The two ends of the side anchor cables are connected to the vertical supports at the two ends of the connecting channel. The inner side of the vertical support is provided with side inclined anchor cables and side inclined concrete partitions.
[0011] The technical effect of the utility model is as follows: by arranging horizontal reinforcement between the two ends of the communication channel, and arranging oblique reinforcement above the two ends of the communication channel, the oblique reinforcements on the left and right sides cross above the communication channel, and cooperate with the horizontal reinforcement to form a triangular structure, which can play a good reinforcement role above the communication channel and can effectively prevent the occurrence of water and sand gushing from above, and various reinforcement structures are composed of concrete interlayers and anchor cables, and the strength of the concrete interlayer is combined with the convenient tensioning anchor cable to make the whole equipment more stable, and the anchor cable and the concrete structure form a triangular structure. A water-stop curtain is formed to further improve the overall reinforcement strength. Since the oblique reinforcements are intertwined in the soil layer to form a crossed claw-type structure, the adjacent distances between adjacent oblique anchor cables and oblique concrete barriers can be minimized. In this way, after tensioning, the amount of untensioned soil layers can be reduced, the overall strength of the soil layer above the connecting channel can be strengthened, and the occurrence of water and sand gushing can be reduced. At the same time, the horizontal reinforcement and oblique reinforcement above the connecting channel cooperate with the vertical reinforcement on both sides of the connecting channel to form a closed advance support system, thereby achieving an effective reinforcement structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] This specification includes the following drawings, which show the following contents:
[0013] Figure 1 This is a structural schematic diagram of a communication channel reinforcement structure of the utility model;
[0014] Figure 2 for Figure 1 A schematic diagram of horizontal reinforcement of a communication channel reinforcement structure;
[0015] Figure 3 for Figure 1 A schematic diagram of the oblique reinforcement of a communication channel reinforcement structure;
[0016] Figure 4 for Figure 1 A schematic diagram of the oblique reinforcement cross of a connection channel reinforcement structure;
[0017] Figure 5 for Figure 1 A schematic diagram of a cement slurry section of a connecting channel reinforcement structure;
[0018] Figure 6 for Figure 1 A schematic diagram of the main tunnel of a connecting channel reinforcement structure;
[0019] Figure 7 for Figure 1 Schematic diagram of vertical reinforcement of a communication channel reinforcement structure.
[0020] The markings in the figure are: 1. Communication channel; 2. Horizontal reinforcement; 21. Horizontal anchor cable; 22. Horizontal concrete barrier; 23. Horizontal casing; 3. Oblique reinforcement; 31. Oblique anchor cable; 32. Oblique concrete barrier; 33. Oblique casing; 4. Tunnel segment; 5. Support cross brace; 51. Upper cross brace; 52. Lower cross brace; 53. Top cross brace; 54. Vertical support; 6. Cement slurry section; 7. Isolation frame; 8. Vertical reinforcement; 81. Side concrete barrier; 82. Side anchor cable; 83. Side oblique anchor cable; 84. Side oblique concrete barrier; 9. Main tunnel; 10. Temporary support. DETAILED DESCRIPTION
[0021] The following is a further detailed description of the specific implementation methods of the utility model by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution of the utility model and facilitating its implementation.
[0022] See also Figure 1-7 A connecting channel reinforcement structure, a horizontal reinforcement 2 for reinforcing the top soil layer of the connecting channel 1 is arranged between the two ends of the connecting channel 1, an oblique reinforcement 3 for reinforcing the soil layer above the connecting channel 1 is arranged above the connecting channel 1, the horizontal reinforcement 2 and the oblique reinforcement 3 are both located in the soil layer outside the connecting channel 1, the two ends of the connecting channel 1 are connected to the main tunnel 9, the inside of the main tunnel 9 is covered with a tunnel segment 4, the tunnel segment 4 is provided with a support cross brace 5 connected to the oblique reinforcement 3 and the horizontal reinforcement 2 respectively, a temporary support 10 is arranged in the main tunnel 9, the support cross brace 5 is connected to the temporary support 10, the support cross brace 5 is divided into an upper cross brace 51, a lower cross brace 52 and a top cross brace 53, the upper cross brace 51 is located at the lower cross brace 52 and the top cross brace 53 Above the cross brace 52, the upper cross brace 51 is located below the top cross brace 53, the horizontal reinforcement 2 includes a horizontal anchor cable 21 and a horizontal concrete barrier 22, the oblique reinforcement 3 includes an oblique anchor cable 31 and an oblique concrete barrier 32, both ends of the horizontal anchor cable 21 are connected to the upper cross braces 51 on both sides, the horizontal concrete barrier 22 is connected to the upper cross braces 51 on both sides, the end of the oblique anchor cable 31 is connected to the upper cross brace 51, the oblique concrete barrier 32 is connected to the top cross brace 53, the oblique anchor cables 31 and the oblique concrete barrier 32 are evenly arranged along the bracket cross brace 5, the oblique anchor cables 31 on the left and right sides are staggered with each other, and the oblique concrete barrier 32 on the left and right sides are staggered with each other.
[0023] By arranging horizontal reinforcement 2 and oblique reinforcement 3 above the connecting channel 1, the strength of the connecting channel 1 is reinforced by the cooperation of horizontal reinforcement 2 and oblique reinforcement 3. The oblique reinforcement 3 is arranged at both ends of the connecting channel 1, and the ends are inclined upward with an inclination angle between 30° and 60°. The specific angle of the inclination angle is determined comprehensively according to the length of the connecting channel 1. The oblique reinforcements 3 at both ends are symmetrical to each other. The oblique reinforcements 3 at both ends cross each other above the horizontal reinforcement 2, and are combined with the horizontal reinforcement 2 to form a triangular reinforcement structure, so that the soil layer above the connecting channel 1 is more stable. At the same time, the oblique reinforcements 3 at both ends cross each other, which can effectively reduce the occurrence of water and sand gushing, thereby achieving a better reinforcement effect.
[0024] The tunnel segment 4 is located inside the soil layer, and the lowest end of the support cross brace 5 is 1.5 meters higher than the top of the excavation of the communication channel 1. Space is reserved for the grid steel frame and the second lining after excavation. The support cross brace 5 is used for the construction of horizontal reinforcement 2 and oblique reinforcement 3. The cavity is separated first and then the through hole is milled and drilled to facilitate the subsequent installation of horizontal reinforcement 2 and oblique reinforcement 3. The support cross brace 5 was originally a temporary reinforcement structure for the tunnel segment 4 when the communication channel 1 was excavated. It was mainly an assembly structure of industrial 25 channel steels, and on this basis, channel steels were added to the tensioning part. The support cross brace 5 is not only a part of the temporary support 10 in the main tunnel 9, but also can be used as an anchor tensioning point in the communication channel 1. Since large and small holes are required to separate the anchor cables and casings, holes are drilled through the holes to wash the tunnel segment 4. If there is a small gap between the support cross brace 5 and the tunnel segment 4, it is filled with small steel sections and welded to the support cross brace 5, making full use of existing resources and saving construction costs.
[0025] Anchor cables are added to the horizontal concrete interlayer 22 and the oblique concrete interlayer 32 to assist in the pouring of concrete. The reinforced concrete interlayer and the anchor cables cooperate with each other. The horizontal concrete interlayer 22 and the oblique concrete interlayer 32 can strengthen the soil layer and reduce the occurrence of water and sand gushing. At the same time, anchor cables are set below the concrete interlayer to support the upper concrete interlayer to avoid collapse caused by the weight of the reinforced concrete interlayer. Before pouring concrete and inserting anchor cables, holes are opened first. The oblique anchor cables 31 and the oblique concrete interlayer 32 are at both ends of the communication channel 1. At the same time, the horizontal anchor cables 21 and the horizontal concrete interlayer 22 are constructed from one end of the communication channel to the other end, and the other end receives the horizontal anchor cables 21, the horizontal concrete interlayer 22 and the anchor cables in the horizontal concrete interlayer 22 constructed on the opposite side, and breaks the concrete of the overlapping parts at both ends of the communication channel 1, and consolidates the two ends of the horizontal anchor cables 21 and the horizontal concrete interlayer 22 with the grid steel bars reserved on the outside to stabilize the structure. System anchor cables are used in the communication channel 1 with good geological conditions, and grouting steel flower pipe anchor cables are used in the communication channel 1 with poor geological conditions. They are set along the side walls, and the anchor cables are arranged in a plum blossom shape.
[0026] And the oblique reinforcements 3 on both sides of the end of the connecting channel should be constructed at the same time, and the drilling is carried out using a guide to ensure the construction on the left and right sides. The oblique anchor cables 31 on the left and right sides and the oblique concrete barriers 32 on the left and right sides can cross each other to form a cross curtain. The cross barrier formed by the oblique anchor cables 31 is located below the cross barrier formed by the oblique concrete barrier 32, so that the oblique anchor cables 31 can support the oblique concrete barrier 32. The mutually crossed claw-type structure formed by the oblique reinforcements 3 on both sides can minimize the adjacent distance between adjacent oblique anchor cables 31 and oblique concrete barriers 32. In this way, after tensioning, the amount of soil layer that has not been tensioned can be reduced, the overall strength of the soil layer above the connecting channel 1 can be strengthened, and the occurrence of water and sand gushing can be reduced.
[0027] The horizontal anchor cable 21 is sheathed with a horizontal sleeve 23 , and both ends of the horizontal sleeve 23 are connected to the lower cross braces 52 on both sides. The oblique anchor cable 31 is sheathed with an oblique sleeve 33 , and the ends of the oblique sleeve 33 are connected to the upper cross brace 51 .
[0028] The horizontal sleeve 23 and the oblique sleeve 33 are sleeved on the outside of the horizontal anchor cable 21 and the oblique anchor cable 31, so that the subsequent tensioning is convenient after the tunnels at both ends of the communication channel 1 are cast.
[0029] The end of the oblique anchor cable 31 is provided with a cement slurry section 6 exposed in the soil layer, and the other end of the oblique anchor cable 31 is located outside the upper cross brace 51; the end of the oblique anchor cable 31 is connected to the soil layer through the cement slurry section 6. Since the oblique anchor cable 31 is directly inserted into the soil layer, it cannot be well connected with the soil layer. During tensioning, the oblique anchor cable 31 cannot directly pull the soil layer, affecting the normal tensioning and ultimately affecting the bearing capacity above the entire connecting channel 1. The end of the oblique anchor cable 31 is grouted after being inserted into the soil layer, so that the end of the oblique anchor cable 31 can be consolidated with the soil layer. In the subsequent tensioning process, the oblique anchor cable 31 can pull the movement and deformation of the soil layer, thereby improving the overall bearing capacity and reducing collapse.
[0030] An isolation frame 7 is provided between the oblique casing 33 and the soil layer; after drilling, the isolation frame 7 is installed in the hole, and the oblique anchor cable 31 is guided by the isolation frame 7 to avoid deviation.
[0031] The support cross brace 5 also includes vertical supports 54, which are arranged at both ends of the lower cross brace 52. Vertical reinforcements 8 are provided between the vertical supports 54 at both ends of the communication channel 1; the vertical reinforcements 8 are used to reinforce the vertical reinforcement layer to reduce the possibility of landslides.
[0032] The vertical reinforcement 8 includes a side concrete barrier 81 and a side anchor cable 82. The two ends of the side concrete barrier 81 are connected to the vertical supports 54 at the two ends of the communication channel 1. The two ends of the side anchor cable 82 are connected to the vertical supports 54 at the two ends of the communication channel 1. The inner side of the vertical support 54 is provided with a side oblique anchor cable 83 and a side oblique concrete barrier 84. Since the focus of the two sides of the communication channel 1 is to contain the gushing water and sand, there is no gravity or ground load above the communication channel 1. Therefore, the distribution of the vertical reinforcement 8 is two side concrete barriers 81 on the top and one side anchor cable on the bottom. The cables 82 are at the bottom, arranged evenly in groups of three, and assisted by side inclined anchor cables 83 and side inclined concrete barriers 84 that cross each other into a claw shape, which can effectively increase the ability to resist lateral water and sand gushing. The distribution of the side inclined anchor cables 83 and the side inclined concrete barriers 84 is the same as that of the side concrete barriers 81 and the side anchor cables 82. The side inclined anchor cables 83 and the side anchor cables 82 form an angle of 10-20 degrees. The vertical reinforcements 8 on the left and right sides cooperate with the horizontal reinforcements 2 and the oblique reinforcements 3 above the connecting channel 1 to form a closed advance support reinforcement structure.
[0033] The two sides of the communication channel 1 are the corresponding side and the receiving side. The receiving side first washes the drilling hole to test the geological conditions of the receiving side. If necessary, the exploration hole heading face is reinforced to meet the self-stabilization of the heading face and the opposite side through the belt sleeve anchor cable, break the corresponding pipe segment on the receiving side, and lay the corresponding tensioning connecting beam. The sleeve anchor cable on the receiving side is laid corresponding to the bracket cross brace 5 on the corresponding side. The bracket cross brace 5 on the receiving side can be cut through the bracket cross brace 5 on the receiving side, and the sleeve anchor cable can be passed through the bracket cross brace 5 on the receiving side. The reinforced concrete structure and the small beam-type steel bars on the receiving side are consolidated. The tensioning can be carried out only after the concrete strength of the small beam-type steel bars and the reinforced concrete structure meet the tensioning conditions. Before the heading face is excavated, it is necessary to carry out pre-grouting reinforcement of the advance small guide tube. Now the advance small guide tube is inserted into the top of the portal of the communication channel 1, and the grouting guide tube is pre-buried within the arch range.
[0034] The excavation of the communication channel 1 adopts the up-down step method. First, the 4-6 meters of the upper section are excavated and supported. Then, the upper end face is excavated and supported one frame, and the lower section is excavated and supported one frame in a cycle. The excavation cycle footage is controlled at 0.5-1m. Manual excavation is carried out with a pneumatic pick. According to the actual excavation situation, a water drill core is used with a static crusher to assist the excavation. The excavated earthwork is manually loaded into the transport vehicle running in the interval tunnel and transported away. To ensure safety, earthwork excavation and initial support are carried out alternately. During the operation, the cycle footage shall not be exceeded. At the same time, according to the situation of the surrounding rock, a deformation of 3 to 5 cm is reserved for the vault.
[0035] A method for reinforcing a communication channel is implemented by using a communication channel reinforcement structure, and the steps are as follows:
[0036] S1: Install tunnel segments 4 at both ends of the communication channel 1, and set support cross braces 5 on the tunnel segments 4;
[0037] S2: drilling holes in the soil layer above both ends of the communication channel 1, inserting the horizontal anchor cable 21, and sleeve the horizontal casing 23 outside the horizontal anchor cable 21, and pouring a horizontal concrete barrier 22 at the same time to form a water-stop curtain;
[0038] S3: insert oblique reinforcements 3 from above both sides of the end of the communication channel 1, and the oblique reinforcements 3 are tilted upward. The oblique reinforcements 3 on the left and right sides cross each other to form a triangle with the horizontal reinforcements 2, thereby completing the reinforcement of the communication channel 1.
[0039] In S1, the main tunnel 9 is constructed first, and the tunnel segments 4 are installed in the main tunnel 9. A support cross brace 5 of about nine meters is arranged in the double-track main tunnel 9 outside the tunnel gates at both ends of the communication channel 1. The support cross brace 5 is arranged on the tunnel segment 4. The lowest end of the support cross brace 5 is located 1.5 meters above the top of the communication channel 1, and reserved space is reserved for the grid steel frame and the secondary lining after excavation;
[0040] In S2, before installing the horizontal reinforcement 2 and the oblique reinforcement 3, first drill the holes of the tunnel segments 4 in the holes of the horizontal support steel of the support cross brace 5 to insert the oblique anchor cables 31 and the horizontal anchor cables 21, first insert the horizontal sleeve 23 and then bundle the horizontal anchor cables 21, and simultaneously cast to form a horizontal concrete barrier 22. After the concrete solidifies, the horizontal anchor cables 21 are tensioned to form a water-stop curtain. The horizontal anchor cables 21 and the horizontal concrete barrier 22 are constructed from one end of the communication channel to the other end, and the other end receives the horizontal anchor cables 21, the horizontal concrete barrier 22 and the anchor cables in the horizontal concrete barrier 22 applied on the opposite side, and breaks the concrete of the overlapping parts at both ends of the communication channel 1 and the concrete of the corresponding position on the receiving side, and consolidates the two ends of the horizontal concrete barrier 22 with the grid steel bars reserved on the outside to stabilize the structure;
[0041] In S3, the oblique anchor cables 31 above the two ends of the communication channel 1 should be drilled at the same time, and a guide drill is used to drill holes to ensure that the main oblique anchor cables 31 and the oblique concrete barrier 32 can cross each other to form a cross barrier. After drilling, an isolation frame 7 is installed in the hole to avoid the hole collapse before the oblique anchor cables 31 are installed. The cross barrier formed by the oblique anchor cables 31 is located below the cross barrier formed by the oblique concrete barrier 32, so that the oblique anchor cables 31 can play the role of supporting the oblique concrete barrier 32. In this way, the mutually crossed claw-type structure formed by the oblique reinforcements 3 on both sides can minimize the adjacent distance between adjacent oblique anchor cables 31 and oblique concrete barrier 32, and grouting is performed after the oblique anchor cables 31 are inserted, so that the ends of the oblique anchor cables 31 can be consolidated with the soil layer, and in the subsequent tensioning process, the oblique anchor cables 31 can pull the movement and deformation of the soil layer.
[0042] After the reinforcement of the connecting channel 1 is completed, the connecting channel 1 can be excavated. Before excavation, the groundwater storage conditions of the soil within the excavation range must be investigated, and penetrating exploration holes are made to observe whether there is mud and water flowing out, and the soil samples taken from the drill holes are used to judge the geological conditions. After confirming that the relevant requirements are met, construction can be carried out; after detecting the groundwater storage conditions, the concrete pipe segments on the inner wall of the connecting channel 1 are cut using a concrete core drilling rig, and a support frame is set up to assist in cutting.
[0043] The technical effect of the utility model is as follows: by setting a horizontal reinforcement 2 between the two ends of the communication channel 1, and setting an oblique reinforcement 3 above the two ends of the communication channel 1, the oblique reinforcements 3 on the left and right sides cross above the communication channel 1, and cooperate with the horizontal reinforcement 2 to form a triangular structure, so that the communication channel 1 can play a good reinforcement role above, and can effectively prevent the occurrence of water and sand gushing from above, and various reinforcement structures are composed of concrete interlayers and anchor cables. The strength of the concrete interlayer is combined with the convenient tensioning anchor cable to make the whole equipment more stable, and the anchor cable and the concrete structure form a The water-stop curtain further improves the overall reinforcement strength. Since the oblique reinforcements 3 are intertwined in the soil layer to form a crossed claw-shaped structure, the adjacent distances between the adjacent oblique anchor cables 31 and the oblique concrete barriers 32 can be minimized. In this way, after tensioning, the amount of untensioned soil layers can be reduced, and the overall strength of the soil layer above the connecting channel 1 can be strengthened to reduce the occurrence of water and sand gushing. At the same time, the horizontal reinforcement 2 and oblique reinforcement 3 above the connecting channel 1 cooperate with the vertical reinforcement on both sides of the connecting channel 1 to form a closed advance support system, thereby achieving an effective reinforcement structure.
[0044] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.
Claims
1. A communication channel reinforcement structure, characterized in that: A horizontal reinforcement (2) for reinforcing the soil layer at the top of the communication channel (1) is provided between the two ends of the communication channel (1); an oblique reinforcement (3) for reinforcing the soil layer above the communication channel (1) is provided above the communication channel (1); the horizontal reinforcement (2) and the oblique reinforcement (3) are both located in the soil layer outside the communication channel (1); the two ends of the communication channel (1) are connected to a main tunnel (9); the interior of the main tunnel (9) is covered with a tunnel segment (4); a support cross brace (5) connected to the oblique reinforcement (3) and the horizontal reinforcement (2) is provided in the tunnel segment (4); the support cross brace (5) is divided into an upper cross brace (51), a lower cross brace (52) and a top cross brace (53); the upper cross brace (51) is located above the lower cross brace (52); the upper cross brace (51) is located above the top cross brace (53); Below the support (53), the horizontal reinforcement (2) includes a horizontal anchor cable (21) and a horizontal concrete barrier (22), and the oblique reinforcement (3) includes an oblique anchor cable (31) and an oblique concrete barrier (32). The two ends of the horizontal anchor cable (21) are connected to the upper cross braces (51) on both sides, and the horizontal concrete barrier (22) is connected to the upper cross braces (51) on both sides. The end of the oblique anchor cable (31) is connected to the upper cross brace (51), and the oblique concrete barrier (32) is connected to the top cross brace (53). The oblique anchor cables (31) and the oblique concrete barrier (32) are evenly arranged along the support cross brace (5), and the oblique anchor cables (31) on the left and right sides are staggered and distributed, and the oblique concrete barrier (32) on the left and right sides are staggered and distributed.
2. A communication channel reinforcement structure according to claim 1, characterized in that: The horizontal anchor cable (21) is sheathed with a horizontal sleeve (23), and the two ends of the horizontal sleeve (23) are connected to the lower cross braces (52) on both sides. The oblique anchor cable (31) is sheathed with an oblique sleeve (33), and the end of the oblique sleeve (33) is connected to the upper cross brace (51).
3. A communication channel reinforcement structure according to claim 1, characterized in that: The end of the oblique anchor cable (31) is provided with a cement slurry section (6) located in the soil layer, and the other end of the oblique anchor cable (31) is located outside the upper cross brace (51).
4. A communication channel reinforcement structure according to claim 2, characterized in that: An isolation frame (7) is provided between the oblique casing (33) and the soil layer.
5. A communication channel reinforcement structure according to claim 1, characterized in that: The support cross brace (5) further comprises vertical supports (54), wherein the vertical supports (54) are arranged at both ends of the lower cross brace (52), and vertical reinforcements (8) are arranged between the vertical supports (54) at both ends of the communication channel (1).
6. A communication channel reinforcement structure according to claim 5, characterized in that: The vertical reinforcement (8) comprises a side concrete barrier (81) and a side anchor cable (82), the two ends of the side concrete barrier (81) being connected to the vertical supports (54) at the two ends of the communication channel (1), the two ends of the side anchor cable (82) being connected to the vertical supports (54) at the two ends of the communication channel (1), and the inner side of the vertical support (54) being provided with a side oblique anchor cable (83) and a side oblique concrete barrier (84).