Shield tunnel lining reinforcing structure

Abstract

The utility model provides a shield tunnel lining reinforcing structure, which belongs to the technical field of lining reinforcement and comprises a plurality of shield sheets, waterproof structures are arranged on the shield sheets, and connecting mechanisms and supporting mechanisms are further arranged on the shield sheets. The problems that in the excavation process of an existing tunnel, an original stratum structure is damaged, underground water seepage is possibly caused, if waterproof measures are not in place, underground water erodes a tunnel structure, the stability of the tunnel is affected, and even the tunnel collapses are solved, and meanwhile in the long-term use process, the underground water cannot be damaged. And the lining deformation exceeds the limit due to ground overload, bolt corrosion, structure aging and the like, so that ground surface settlement is aggravated, and normal use of the tunnel is influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lining reinforcement, and in particular relates to a shield tunnel lining reinforcement structure. Background Art

[0002] In recent years, the development and utilization of underground space has increasingly become the first choice for large cities to solve traffic problems. The shield method has become the main construction method for building subway tunnels. Some shield tunnels have been in operation for decades. The performance of the structure will gradually deteriorate during long-term service. Due to surrounding construction projects and humid tunnel environment during operation, the tunnel structure has structural deformation, misalignment, water leakage, cracks, concrete spalling and other problems. Some newly built tunnels have similar problems due to design defects and uncertainty in construction conditions. These problems affect the normal operation of the tunnel and even the structural safety.

[0003] The excavation of existing tunnels will destroy the original stratum structure and may cause groundwater infiltration. If waterproofing measures are not in place, groundwater will erode the tunnel structure, affect the stability of the tunnel, and even cause tunnel collapse. At the same time, during long-term use, the lining deformation exceeds the limit due to ground overload, bolt rust, structural aging and other reasons, which not only aggravates surface subsidence but also affects the normal use of the tunnel. Summary of the invention

[0004] The utility model provides a shield tunnel lining reinforcement structure, which aims to solve the problem that the existing tunnel will destroy the original stratum structure during the excavation process, which may cause groundwater to seep in. If the waterproofing measures are not in place, the groundwater will erode the tunnel structure, affect the stability of the tunnel, and even cause the tunnel to collapse. At the same time, during long-term use, the lining deformation exceeds the limit due to ground overload, bolt rust, structural aging and other reasons, which not only aggravates the surface settlement but also affects the normal use of the tunnel.

[0005] The embodiment of the utility model provides a shield tunnel lining reinforcement structure, comprising a plurality of shield plates, wherein the shield plates are provided with waterproof structures, and the shield plates are also provided with connecting mechanisms and supporting mechanisms.

[0006] Furthermore, the waterproof structure includes an EVA waterproof board adhered to the outer wall surface of the shield piece, and the side of the EVA waterproof board away from the shield piece is adhered to a geotextile, the outer wall surfaces of the geotextile can reach the rock layer, and the left and right sides of the shield piece are fixedly connected with water-swellable waterstop strips, and the water-swellable waterstop strips on adjacent shield pieces are tightly attached to each other.

[0007] By adopting the above technical solutions, the geotextile can effectively isolate the tunnel from the surrounding soil layer, while allowing the water in the soil to drain through the geotextile, avoiding water accumulation. At the same time, the geotextile can also provide a certain amount of friction and support force, which helps to stabilize the surrounding soil layer and prevent damage to the tunnel caused by soil collapse or sliding. The EVA waterproof board is directly in contact with the shield segment to prevent water from penetrating into the tunnel interior. The water-swelling waterstop strip can quickly expand and fill the small gaps when contacting water, greatly improving the overall sealing performance.

[0008] Further, the connecting mechanism includes first slots provided at the upper and lower ends inside the shield segment and second slots provided at the left and right ends. The first slots and the second slots of adjacent shield segments communicate with each other, and the first slots and the second slots at one end towards the center of the shield segment communicate with the outside. Threaded rods are inserted into both the first slots and the second slots, and adjacent shield segments are spliced together through the threaded rods.

[0009] By adopting the above technical solutions, the threaded rods are inserted into the first slots and the second slots of the shield segment respectively, and are inserted out from the first slots and the second slots of the adjacent shield segment, and are fastened by bolts, so that multiple shield segments can be spliced together.

[0010] Further, both the first slots and the second slots are in a curved arc shape, and the threaded rods are in a curved arc shape adapted to the first slots and the second slots.

[0011] By adopting the above technical solutions, the curved arc-shaped first slots, second slots and threaded rods can be more adapted to fit the shape of the tunnel, adapt to the change of the tunnel curvature, improve the splicing accuracy, and at the same time improve the dispersive force of the soil pressure above the shield segment.

[0012] Further, the support mechanism includes two casting holes and two strengthening blocks provided on the inner wall surface of the shield segment. The two strengthening blocks are respectively located at the upper and lower ends of the inner wall surface of the shield segment. A support column is fixedly connected in the strengthening block. One end of the support column extends outside the strengthening block and is welded to the support column of the adjacent shield segment. The other end of the support column communicates with the casting hole.

[0013] By adopting the above technical solutions, the support column can further improve the support effect on the shield segment, improve the fastening degree between the shield segments, and further improve the dispersive force of the soil pressure.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. Through the setting of the waterproof structure, the geotextile can effectively isolate the tunnel from the surrounding soil layer, while allowing the water in the soil to drain through the geotextile, avoiding water accumulation. At the same time, the geotextile can also provide a certain amount of friction and support force, which helps to stabilize the surrounding soil layer and prevent damage to the tunnel caused by soil collapse or sliding. The EVA waterproof board is directly in contact with the shield segment to prevent water penetration into the tunnel interior. The water-swelling waterstop strip can rapidly expand and fill the small gaps when contacting water, greatly improving the overall sealing performance.

[0016] 2. Through the setting of the connection mechanism, the threaded rods are inserted into the first slots and the second slots of the shield segments respectively, and are inserted out of the first slots and the second slots of the adjacent shield segments, and are fastened by bolts, so that multiple shield segments can be spliced together. The curved arc-shaped first slots, second slots and the threaded rods can be more adapted to fit the shape of the tunnel, adapt to the change of the tunnel curvature, improve the splicing accuracy, and at the same time improve the dispersion force of the soil pressure above the shield segments.

[0017] 3. Through the setting of the support mechanism, the support columns can further improve the support effect on the shield segments, improve the fastening degree between the shield segments, and further improve the dispersion force of the soil pressure.

[0018] Other features and advantages of the present invention will be described in the subsequent description, and part of them will be obvious from the description, or will be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the structure specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present invention, and constitute a part of the description. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of the shield segment splicing structure of the embodiment of the present invention;

[0021] Figure 2 is a front view structure diagram of the shield segment of the embodiment of the present invention;

[0022] Figure 3 is a front view perspective structure diagram of the shield segment of the embodiment of the present invention;

[0023] Figure 4 is a side view structure diagram of the shield segment of the embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of the threaded rod structure of the embodiment of the present invention;

[0025] Reference numerals: 1, shield segment; 2, waterproof structure; 21, EVA waterproof board; 22, geotextile; 23, water-swelling waterstop strip; 3, connecting mechanism; 31, first slot; 32, second slot; 33, threaded rod; 4, support mechanism; 41, pouring hole; 42, reinforcement block; 43, support column. Detailed implementation manners

[0026] In order to make the objectives, technical solutions and advantages of the technical solutions of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings of the specific embodiments of the present utility model. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Referring to Figures 1-5 , an embodiment of the present utility model provides a reinforcement structure for a shield tunnel lining, including a plurality of shield segments 1. A waterproof structure 2 is provided on the shield segment 1. The waterproof structure 2 includes an EVA waterproof board 21 attached to the outer wall surface of the shield segment 1. A geotextile 22 is attached to the side of the EVA waterproof board 21 away from the shield segment 1. The outer wall surfaces of the geotextile 22 can all abut against the rock formation. Water-swelling waterstop strips 23 are fixedly connected to both the left and right sides of the shield segment 1. The water-swelling waterstop strips 23 on adjacent shield segments 1 are in close contact with each other. The geotextile 22 can effectively isolate the tunnel from the surrounding soil layer, and at the same time allow the water in the soil to drain through the geotextile 22 to avoid water accumulation. At the same time, the geotextile 22 can also provide a certain amount of friction and support force, which helps to stabilize the surrounding soil layer and prevent damage to the tunnel caused by soil collapse or sliding. The EVA waterproof board 21 is in direct contact with the shield segment 1 to prevent water from penetrating into the tunnel interior. The water-swelling waterstop strip 23 can quickly expand and fill the small gaps when in contact with water, greatly improving the overall sealing performance.

[0028] Referring to Figures 1-5, a connecting mechanism 3 is further provided on the shield segment 1. The connecting mechanism 3 includes a first slot 31 provided at the upper and lower ends inside the shield segment 1 and a second slot 32 provided at the left and right ends. The first slot 31 and the second slot 32 of adjacent shield segments 1 communicate with each other. The first slot 31 and the second slot 32 at one end towards the center of the shield segment 1 communicate with the outside. Threaded rods 33 are inserted into both the first slot 31 and the second slot 32. Adjacent shield segments 1 are spliced by the threaded rods 33. The threaded rods 33 are respectively inserted into the first slot 31 and the second slot 32 of the shield segment 1, and are inserted out from the first slot 31 and the second slot 32 of the adjacent shield segment 1, and are fastened by bolts, so that multiple shield segments 1 can be spliced together.

[0029] Refer to Figures 1-5 , both the first slot 31 and the second slot 32 are in a curved arc shape, and the threaded rod 33 is in a curved arc shape adapted to the first slot 31 and the second slot 32. The curved arc-shaped first slot 31, second slot 32 and threaded rod 33 can be more adapted to fit the shape of the tunnel, adapt to the change of the tunnel curvature, improve the splicing accuracy, and at the same time improve the dispersion force of the soil layer pressure above the shield segment 1.

[0030] Refer to Figures 1-5 , a support mechanism 4 is further provided on the shield segment 1. The support mechanism 4 includes two casting holes 41 provided on the inner wall surface of the shield segment 1 and two reinforcing blocks 42. The two reinforcing blocks 42 are respectively located at the upper and lower ends of the inner wall surface of the shield segment 1. A support column 43 is fixedly connected in the reinforcing block 42. One end of the support column 43 extends outside the reinforcing block 42 and is welded to the support column 43 of the adjacent shield segment 1. The other end of the support column 43 communicates with the casting hole 41. The support column 43 can further improve the support effect on the shield segment 1, improve the fastening degree between the shield segments 1, and further improve the dispersion force of the soil layer pressure.

[0031] The specific implementation method is as follows: When in use, first install the geotextile 22 on the outer wall surface of the shield segment 1, and then install the EVA waterproof board 21 outside the geotextile 22. When splicing the shield segments 1 in sequence, the water-swellable water-stop strips 23 of adjacent shield segments 1 are closely attached to each other, greatly improving the overall waterproof ability. Then, the threaded rods 33 are respectively passed through the two first slots 31 and the second slots 32 of adjacent shield segments 1 and fastened by bolts, so that multiple shield segments 1 can be spliced together. At the same time, the support columns 43 on the surfaces of adjacent shield segments 1 can be welded together and connected to the casting holes 41, further improving the stability of the overall structure, strengthening the structural support ability of the lining, and avoiding the lining deformation amount exceeding the limit.

[0032] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shield tunnel lining reinforcement structure, comprising a plurality of shield segments (1), characterized in that, The shield segment (1) is provided with a waterproof structure (2), and the shield segment (1) is further provided with a connection mechanism (3) and a support mechanism (4); The waterproof structure (2) includes an EVA waterproof board (21) attached to the outer wall surface of the shield segment (1). A geotextile (22) is attached to the side of the EVA waterproof board (21) away from the shield segment (1). The outer wall surfaces of the geotextile (22) can all abut against the rock stratum. Water swelling waterstop strips (23) are fixedly connected to both the left and right sides of the shield segment (1), and the water swelling waterstop strips (23) on adjacent shield segments (1) are closely attached to each other; The connection mechanism (3) includes first slots (31) provided at the upper and lower ends inside the shield segment (1) and second slots (32) provided at the left and right ends. The first slots (31) and the second slots (32) of adjacent shield segments (1) communicate with each other. The first slots (31) and the second slots (32) at the end towards the center of the shield segment (1) communicate with the outside. Threaded rods (33) are inserted into both the first slots (31) and the second slots (32), and adjacent shield segments (1) are spliced by the threaded rods (33); The support mechanism (4) includes two pouring holes (41) and two strengthening blocks (42) provided on the inner wall surface of the shield segment (1). The two strengthening blocks (42) are respectively located at the upper and lower ends of the inner wall surface of the shield segment (1). A support column (43) is fixedly connected in the strengthening block (42). One end of the support column (43) extends outside the strengthening block (42) and is welded to the support column (43) of the adjacent shield segment (1). The other end of the support column (43) communicates with the pouring hole (41).

2. The shield tunnel lining reinforcement structure according to claim 1, wherein: Both the first slot (31) and the second slot (32) are in a curved arc shape, and the threaded rod (33) is in a curved arc shape adapted to the first slot (31) and the second slot (32).

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