Shield TBM tunnel invert arch structure

Abstract

The utility model belongs to shield type TBM tunnel construction technical field discloses a kind of shield type TBM tunnel bottom inverted arch structure, including inverted arch platform and bottom segment.The inverted arch platform and bottom segment are all independent precast parts, the third end surface of bottom segment is cambered surface, when shield type TBM carries out tunnel synchronous lining, vacuum chuck can effectively adsorb the third end surface of bottom segment.After completing shield type TBM tunnel synchronous lining, shield type TBM can adopt mechanical clamping device to hoist inverted arch platform.Because inverted arch platform and bottom segment are all independent precast parts, relative to inverted arch platform and bottom segment overall prefabrication, the weight of inverted arch platform is reduced, more suitable for mechanical clamping device hoisting.The first end surface of inverted arch platform is plane, and vehicle can travel on the first end surface.Inverted arch platform and bottom segment are connected by first connecting assembly and second connecting assembly, further improve the stability of shield type TBM tunnel bottom inverted arch structure.

Description

Technical Field

[0001] This utility model relates to the field of shield-type TBM tunnel construction technology, and in particular to a shield-type TBM tunnel bottom arch structure. Background Technology

[0002] A tunnel boring machine (TBM) is a heavy-duty machine specifically designed for excavating tunnels in hard rock formations. It includes open-face and shield tunneling types and is widely used in railways, highways, water conservancy projects, and oil and gas pipeline crossings. Shield TBMs utilize a full-circumference shield with synchronous lining, often using precast segments for assembly. After lining, the tunnel is circular. To accommodate material transport and spoil removal during construction, an inverted arch platform is installed on the bottom segments to prevent safety hazards from vehicles traveling on the curved bottom segments.

[0003] The related technology discloses a TBM tunnel invert block lining structure, which includes several identical invert blocks. The invert blocks are spliced ​​together in sequence to form the tunnel invert lining. The invert blocks and the end faces of the remaining secondary linings are connected by anchor steel bars, which strengthens the connection between the invert blocks and the secondary linings. The upper end face of the invert block is a plane, and a construction track can be installed on the upper end face or people can walk directly on the upper end face to meet complex construction organization conditions.

[0004] However, the aforementioned TBM tunnel invert block lining structure is a prefabricated structure suitable for open-face TBM tunnel construction with a large cross-section. For shield-type TBM tunnel construction, synchronous lining uses vacuum suction cups or mechanical clamping devices to assemble prefabricated segments. To ensure ease of movement, the inner surface of the invert block lining structure is non-circular, making it impossible to effectively use vacuum suction cups for assembly. Moreover, the overall weight of the invert block lining structure is relatively large, making mechanical clamping devices unsuitable for hoisting. The existing invert block lining structure cannot guarantee that vacuum suction cups can hoist the entire ring of prefabricated segments, thus failing to successfully complete the synchronous lining of shield-type TBM tunnels. Utility Model Content

[0005] The purpose of this utility model is to provide a shield-type TBM tunnel bottom arch structure to solve the technical problem that the existing arch block lining structure cannot guarantee that the vacuum suction cup can lift the whole ring of precast segments and successfully complete the synchronous lining of the shield-type TBM tunnel.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The shield-type TBM tunnel lining arch structure includes:

[0008] An inverted arch platform, comprising a first end face and a second end face, wherein the first end face is a plane and the second end face is an arc surface, the inverted arch platform is an independent prefabricated component, and a first connecting component is provided on the inverted arch platform;

[0009] The bottom tube segment includes a third end face, which is an arc surface and can fit with the second end face. The bottom tube segment is an independent prefabricated component and is provided with a second connecting component.

[0010] The inverted arch platform and the bottom segment are connected by the first connecting component and the second connecting component.

[0011] Optionally, the first connecting component includes a first anchor and a first connector that are interconnected, the first connecting component being embedded in the invert platform and the first connector being at least partially exposed outside the invert platform;

[0012] The second connecting component includes a second anchor and a second connector that are interconnected. The second connecting component is embedded in the bottom tube segment and the second connector is at least partially exposed outside the bottom tube segment. The first connector and the second connector are connected by an intermediate connector.

[0013] Optionally, the invert platform is provided with a plurality of first connecting components, and the bottom tube segment is provided with a plurality of second connecting components, the positions of the first connecting components and the positions of the second connecting components corresponding one-to-one.

[0014] Optionally, a drainage trough is provided on the arch platform, the drainage trough extends through the arch platform along a first direction, the drainage trough also has a slot facing the vertical direction, and the two sides of the slot are covered with a grid cover plate.

[0015] Optionally, the inverted arch platform further includes a plurality of third connecting components. At least one of the third connecting components is provided at both ends of the bottom of the drainage trough along the first direction, and at least one of the third connecting components is provided at both ends of the two end faces of the inverted arch platform along the circumferential direction of the second end face along the first direction.

[0016] Optionally, the arch platform is provided with a first insertion structure and a second insertion structure on both sides along the first direction, and two adjacent arch platforms along the first direction can be connected by the first insertion structure and the second insertion structure.

[0017] Optionally, the inverted arch platform is also equipped with a hoisting unit.

[0018] Optionally, the hoisting part is a hoisting hole opened on the inverted arch platform, and spiral steel bars are pre-embedded in the hoisting hole.

[0019] Optionally, the width of the inverted arch platform and the bottom segment are equal along the first direction.

[0020] Optionally, the two ends of the arch platform along the circumferential direction of the second end face are obliquely cut structures.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a shield-type TBM tunnel lining arch structure. Both the arch platform and the bottom segments are independent prefabricated components. The third end face of the bottom segments is an arc surface. During synchronous tunnel lining, the vacuum suction cups of the shield-type TBM effectively adhere to the third end face of the bottom segments, assembling them with other segments into a complete tunnel lining structure to withstand the pressure of the surrounding rock and provide waterproofing. After the synchronous lining of the shield-type TBM tunnel is completed, the arch platform can be hoisted using a mechanical clamping device. Because the arch platform and bottom segments are independent prefabricated components, compared to integral prefabrication, the weight of the arch platform is reduced, making it more suitable for mechanical clamping device hoisting. Simultaneously, the reduced weight of the bottom segments promotes safer construction. The first end face of the arch platform is flat, allowing vehicles to travel on it, meeting the needs of material transportation and spoil removal within the tunnel during construction. The third end face can fit snugly against the second end face, ensuring the arch platform is stably positioned on the bottom segments. The invert platform and the bottom segment are connected by the first connecting component and the second connecting component, which further improves the stability of the bottom invert structure of the shield-type TBM tunnel. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the shield-type TBM tunnel bottom arch structure described in this embodiment of the utility model;

[0024] Figure 2 This is a side view of the shield-type TBM tunnel paving arch structure described in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the arch platform described in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram showing the connection between the inverted arch platform and the bottom tube segment as described in this embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the connection between adjacent arch platforms as described in an embodiment of this utility model.

[0028] In the picture:

[0029] 1. Inverted arch platform; 11. First end face; 12. Second end face; 13. First connecting component; 131. First anchor; 132. First connector; 14. Intermediate connector; 15. Drainage trough; 151. Groove opening; 152. Grating cover plate; 153. Groove bottom; 16. Third connecting component; 17. First plug-in structure; 18. Second plug-in structure; 19. Lifting part; 2. Bottom segment; 21. Third end face; 22. Second connecting component; 221. Second anchor; 222. Second connector. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figures 1-3As shown, this utility model provides a shield-type TBM tunnel lining arch structure, including an arch platform 1 and a bottom segment 2. The arch platform 1 includes a first end face 11 (the upper end face of the arch platform 1) and a second end face 12 (the lower end face of the arch platform 1). The first end face 11 is a plane, and the second end face 12 is an arc surface. The arch platform 1 is an independent precast component, and a first connecting assembly 13 is provided on the arch platform 1. The bottom segment 2 includes a third end face 21 (the upper end face of the bottom segment 2). The third end face 21 is an arc surface, and it can fit into the second end face 12, meaning that the curvatures of the third end face 21 and the second end face 12 are the same. The bottom segment 2 is an independent precast component, and a second connecting assembly 22 is provided on the bottom segment 2. The arch platform 1 and the bottom segment 2 are connected by the first connecting assembly 13 and the second connecting assembly 22.

[0035] Both the invert platform 1 and the bottom segment 2 are independent precast components. The third end face 21 of the bottom segment 2 is an arc surface. During the synchronous lining of the tunnel, the vacuum suction cup of the shield tunneling machine (hereinafter referred to as TBM) can effectively adsorb the third end face 21 of the bottom segment 2 and assemble the bottom segment 2 with other segments into a complete tunnel lining structure, which is used to withstand the pressure of the surrounding rock and play a waterproof role. After the synchronous lining of the tunnel is completed, the shield TBM can use a mechanical clamping device to lift the invert platform 1. Since the invert platform 1 and the bottom segment 2 are both independent precast components, compared with the overall precasting of the invert platform 1 and the bottom segment 2, the weight of the invert platform 1 is reduced, making it more suitable for mechanical clamping device lifting. At the same time, the weight of the bottom segment 2 is reduced, which is more conducive to safe construction. The first end face 11 of the invert platform 1 is a plane, and vehicles can drive on the first end face 11, which meets the needs of material transportation and spoil removal in the tunnel during construction. The third end face 21 can fit into the second end face 12, so that the invert platform 1 is stably set on the bottom segment 2. The invert platform 1 and the bottom segment 2 are connected by the first connecting component 13 and the second connecting component 22, which further improves the stability of the invert structure of the shield-type TBM tunnel.

[0036] Specifically, such as Figure 1 As shown, the invert platform 1 and the bottom segment 2 have the same width along the first direction (X direction in the figure), meaning that one invert platform 1 is installed on each bottom segment 2. Compared to installing the same invert platform 1 on multiple bottom segments 2, when a bottom segment 2 or invert platform 1 is damaged, it can be flexibly replaced, reducing the maintenance difficulty of the bottom invert structure of the shield-type TBM tunnel.

[0037] Optionally, such as Figure 2As shown, the first connecting component 13 includes a first anchor 131 and a first connector 132 connected to each other. The first connecting component 13 is embedded in the invert platform 1, and the first connector 132 is at least partially exposed outside the invert platform 1. The second connecting component 22 includes a second anchor 221 and a second connector 222 connected to each other. The second connecting component 22 is embedded in the bottom segment 2, and the second connector 222 is at least partially exposed outside the bottom segment 2. The first connector 132 and the second connector 222 are connected by an intermediate connector 14. This embodiment achieves the connection between the invert platform 1 and the bottom segment 2 through the above structure. Moreover, the first connecting component 13 and the second connecting component 22 are embedded in the invert platform 1, and the first connector 132 and the second connector 222 are connected by an intermediate connector 14, which improves the connection stability between the invert platform 1 and the bottom segment 2.

[0038] For example, the first anchor 131 consists of two anchoring steel bars pre-embedded in the invert platform 1, the first connector 132 is a steel plate connected to the two anchoring steel bars, the second anchor 221 consists of two anchoring steel bars pre-embedded in the bottom segment 2, the second connector 222 is a steel plate connected to the two anchoring steel bars, and the intermediate connector 14 is a steel plate. The positions of the first connector 132 and the second connector 222 correspond to each other and are fixedly connected to the intermediate connector 14 by welding. The pre-embedding form of the first anchor 131 and the second anchor 221 can be flexibly selected according to the actual setting position, and is not limited here.

[0039] Furthermore, such as Figure 2 and Figure 4 As shown, the invert platform 1 is provided with multiple first connecting components 13, and the bottom tube segment 2 is provided with multiple second connecting components 22. The positions of the first connecting components 13 and the second connecting components 22 correspond one-to-one. Each pair of corresponding first connecting components 13 and second connecting components 22 are fixedly connected by an intermediate connector 14. By providing multiple first connecting components 13 and second connecting components 22, the connection stability between the invert platform 1 and the bottom tube segment 2 is further improved. In this embodiment, four first connecting components 13 are provided on each of the left and right sides of the invert platform 1, and the four first connecting components 13 are spaced apart along the first direction. The bottom tube segment 2 is provided with the same number of second connecting components 22. In other embodiments, different numbers of first connecting components 13 and second connecting components 22 can be provided according to the width of the invert platform 1 and the bottom tube segment 2 along the first direction.

[0040] Optionally, such as Figures 1-3As shown, a drainage channel 15 is provided on the invert platform 1, extending through the invert platform 1 along a first direction. The drainage channel 15 has a slot 151 facing the vertical direction, and grating covers 152 are provided on both sides of the slot 151. The drainage channel 15 can effectively drain wastewater during tunnel construction. When a shield-type TBM is constructing a tunnel, multiple tunnel bottom invert structures are usually set along the first direction, and these multiple tunnel bottom invert structures are arranged adjacent to each other. The drainage channel 15 extends through the invert platform 1 along the first direction, so that the drainage channels 15 of the multiple adjacent tunnel bottom invert structures form a connected drainage channel, facilitating the discharge of wastewater from the tunnel. The grating covers 152 are provided on both sides of the slot 151, which facilitates the entry of wastewater into the drainage channel 15. Furthermore, the upper end face of the grating cover 152 is flush with the first end face 11, improving the driving stability of vehicles on the first end face 11. The grating cover 152 is made of steel or fiberglass, which gives it a certain strength and makes it less prone to damage.

[0041] Optionally, such as Figure 2 and Figure 3 As shown, the invert platform 1 also includes multiple third connecting components 16. At least one third connecting component 16 is provided at both ends of the bottom 153 of the drainage ditch 15 along the first direction. At least one third connecting component 16 is provided at both ends of the end face of the invert platform 1 along the circumferential direction of the second end face 12 (the left and right sides of the invert platform 1) along the first direction. Two adjacent invert platforms 1 are connected by the third connecting components 16. The structure of the third connecting component 16 is the same as that of the first connecting component 13, and the connection method between the third connecting components 16 is the same as that between the first connecting component 13 and the second connecting component 22, which will not be described further here. By providing multiple third connecting components 16, the connection stability between two adjacent invert platforms 1 is improved.

[0042] Furthermore, such as Figure 4 As shown, the inverted arch platform 1 is provided with a first insertion structure 17 and a second insertion structure 18 on both sides along the first direction. Two adjacent inverted arch platforms 1 along the first direction can be connected by the first insertion structure 17 and the second insertion structure 18, which facilitates the accurate positioning and installation of the two adjacent inverted arch platforms 1. For example, the first insertion structure 17 and the second insertion structure 18 can be elliptical tenon and mortise structures.

[0043] Optionally, such as Figures 1-3As shown, the invert platform 1 is also equipped with a hoisting section 19 to facilitate the hoisting and installation of the invert platform 1 by a mechanical clamping device. Specifically, the hoisting section 19 is a hoisting hole opened in the middle of the invert platform 1, and spiral steel bars are pre-embedded in the hoisting hole to facilitate the transportation and installation of the invert platform 1 during tunnel construction. The hoisting section 19 can also be an anchoring hoisting bolt pre-embedded in the invert platform 1.

[0044] For example, the two ends of the inverted arch platform 1 along the circumferential direction of the second end face 12 (the left and right ends of the inverted arch platform 1) are obliquely cut structures. The left and right ends of the inverted arch platform 1 are cut into oblique surfaces. After oblique cutting, the load transfer path is more gentle, reducing local stress peaks, improving the structural durability of the inverted arch platform 1, preventing damage to the weak points of the inverted arch platform 1 under complex construction conditions, and the oblique surfaces after cutting can also realize local water guiding function, which is conducive to the discharge of wastewater in the tunnel.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A shield TBM tunnel invert and inverted arch structure, characterized in that, include: An arch platform (1) is provided, comprising a first end face (11) and a second end face (12). The first end face (11) is a plane, and the second end face (12) is an arc surface. The arch platform (1) is an independent prefabricated component, and a first connecting component (13) is provided on the arch platform (1). The bottom tube segment (2) includes a third end face (21), which is an arc surface. The third end face (21) can fit with the second end face (12). The bottom tube segment (2) is an independent prefabricated component. A second connecting component (22) is provided on the bottom tube segment (2). The inverted arch platform (1) and the bottom tube segment (2) are connected by the first connecting component (13) and the second connecting component (22).

2. The shielded TBM tunnel invert structure of claim 1, wherein, The first connecting component (13) includes a first anchor (131) and a first connector (132) that are connected to each other. The first connecting component (13) is embedded in the arch platform (1) and the first connector (132) is at least partially exposed outside the arch platform (1). The second connecting component (22) includes a second anchor (221) and a second connector (222) that are connected to each other. The second connecting component (22) is embedded in the bottom tube segment (2) and the second connector (222) is at least partially exposed outside the bottom tube segment (2). The first connector (132) and the second connector (222) are connected by an intermediate connector (14).

3. The shielded TBM tunnel invert structure of claim 1, wherein, The arch platform (1) is provided with a plurality of first connecting components (13), and the bottom tube segment (2) is provided with a plurality of second connecting components (22). The positions of the first connecting components (13) and the positions of the second connecting components (22) correspond one-to-one.

4. The shielded TBM tunnel invert structure of claim 1, wherein, A drainage trough (15) is provided on the arch platform (1). The drainage trough (15) penetrates the arch platform (1) along the first direction. The drainage trough (15) also has a slot (151) facing the vertical direction. A grid cover plate (152) is provided on both sides of the slot (151).

5. The shielded TBM tunnel invert structure of claim 4, wherein, The arch platform (1) also includes a plurality of third connecting components (16). At least one third connecting component (16) is provided at both ends of the bottom (153) of the drainage trough (15) along the first direction. At least one third connecting component (16) is provided at both ends of the two end faces of the arch platform (1) along the circumferential direction of the second end face (12) along the first direction.

6. The shielded TBM tunnel invert structure of claim 4, wherein, The arch platform (1) is provided with a first plug-in structure (17) and a second plug-in structure (18) on both sides along the first direction. Two adjacent arch platforms (1) along the first direction can be plugged in through the first plug-in structure (17) and the second plug-in structure (18).

7. The shielded TBM tunnel invert structure according to any one of claims 1-6, wherein, The arch platform (1) is also equipped with a hoisting unit (19).

8. The shielded TBM tunnel invert structure of claim 7, wherein, The hoisting part (19) is a hoisting hole opened on the arch platform (1), and a spiral steel bar is pre-embedded in the hoisting hole.

9. The shielded TBM tunnel invert structure according to any one of claims 1-6, wherein, The inverted arch platform (1) and the bottom tube segment (2) have the same width along the first direction.

10. The shielded TBM tunnel invert structure according to any one of claims 1-6, wherein, The two ends of the arch platform (1) along the circumferential direction of the second end face (12) are obliquely cut structures.

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