Double-layer stacking oval shield tunnel segment lining structure

Abstract

The invention discloses a double-layer stacking oval shield tunnel segmental lining structure, and relates to the technical field of tunnel construction, the segmental lining structure adopts vertical stacking one-time construction to form a tunnel, and the segmental lining structure comprises a ring A and a ring B which are the same in structure and are of a symmetrical structure along the vertical center line of the tunnel; the first ring and the second ring are continuously and alternately spliced in a staggered joint mode, and each of the first ring and the second ring comprises a standard sub-block, a T-shaped sub-block, a platform sub-block, an adjacent sub-block and a top sealing sub-block. Compared with a single-hole and single-line overlapped tunnel, the vertical parallel double-line tunnel tunneling can be completed at a time, the vertical parallel double-line tunnel tunneling method has the advantages of saving land, reducing demolition and construction risks, controlling structural deformation, avoiding vibration cross influences and the like, risk control over a tunnel group and the surrounding environment is optimized, construction safety risks are greatly reduced, and the construction efficiency is improved. The method has remarkable popularization value and practical significance.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a double-layer stacked oval shield tunnel segment lining structure. Background Art

[0002] With the extensive development and utilization of underground space, the implementation of more and more underground projects needs to consider issues such as the red line restrictions in downtown areas, the improvement of the comprehensive utilization rate of underground space, and the control of crossing risks. Taking urban rail transit as an example, its line network is crisscrossed in the underground space of the city, shuttling through the central area of ​​the city with busy ground traffic, dense flow of people, red line restrictions, and high-rise buildings. Choosing a reasonable rail transit construction technology is the prerequisite for ensuring the safe operation and maintenance of the city, and the shield method with less disturbance to the surrounding environment and flexible linear layout is increasingly widely used in the construction of interval tunnels. At the same time, with the rapid development of urban rail transit construction, service requirements are gradually increasing. More and more line networks intersect, stations transfer between different lines, cross or horizontally pass through different lines, transfer at the same station, and the left and right lines of the interval are restricted by the surrounding environment. It is inevitable that overlapping shield tunnels will appear.

[0003] When transferring at overlapping stations on the same platform is required for greater convenience, especially when transferring at adjacent stations in any direction on the same platform, a complex spatial shield tunnel group with multiple lines overlapping for a long distance will appear. At present, most of the related overlapping tunnel engineering cases at home and abroad adopt a single-hole single-line tunnel with a certain safety distance between them to achieve an upper and lower overlapping arrangement. However, multiple shield constructions often cause a superimposed impact on the surrounding environment. At the same time, it is necessary to consider the risks of overlapping and crossing construction, deformation control, and the cross-impact of vibration of trains in multi-hole tunnels. Therefore, the present invention provides a double-layer overlapping oval shield tunnel segment lining structure. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a double-layer stacked oval shield tunnel segment lining structure, wherein the double-layer stacked oval shield tunnel segment lining structure is constructed by stacking up and down in one step to form a tunnel, wherein the double-layer stacked oval shield tunnel segment lining structure comprises a A ring and a B ring, wherein the A ring and the B ring are symmetrical along the vertical center line of the tunnel, the A ring and the B ring have the same structure, and the A ring and the B ring are continuously alternated and staggered, and the A ring and the B ring both comprise standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks.

[0005] Furthermore, the standard blocks include RH-B1 blocks, RH-B2 blocks, RH-B3 blocks and RH-B4 blocks; the T-type blocks include RH-T1 blocks and RH-T2 blocks; the platform blocks include RH-PT blocks; the adjacent blocks include RH-L1 blocks and RH-L2 blocks; and the capping blocks include RH-F blocks.

[0006] Furthermore, the two sides of the RH-B1 block are respectively assembled with the RH-B2 block and the RH-B3 block by annular bolts, the RH-B3 block is assembled with the RH-T1 block by annular bolts, the RH-B2 block is assembled with the RH-T2 block by annular bolts, an RH-PT block is arranged between the RH-T1 block and the RH-T2 block, and the RH-T1 block is connected to the RH-PT block by annular bolts. The RH-T2 block is connected to the RH-PT block by annular bolts, the RH-B4 block is assembled on the RH-T1 block by annular bolts, the RH-L1 block is assembled on the RH-T2 block by annular bolts, the RH-B4 block is assembled on the RH-L2 block by annular bolts, the RH-F block is assembled on the RH-L1 block by annular bolts, and the RH-L2 block and the RH-F block are connected by annular bolts.

[0007] Furthermore, after the A ring or the B ring is spliced ​​into a ring, the A ring and the B ring are longitudinally connected by longitudinal bolts, and the shield tunneling is reciprocated in sequence and the A ring or the B ring is assembled and connected to form a tunnel structure.

[0008] Furthermore, the longitudinal bolts are in the form of oblique bolts, bent bolts, and other quick connectors.

[0009] Furthermore, the standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with lifting holes, through which each block can be lifted conveniently, and the lifting holes are also used as grouting holes. The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with mortise and tenon, through which the mortise and tenon are convenient for splicing and effectively alleviate the occurrence of misalignment at the joints.

[0010] Furthermore, the standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are also provided with two groups of symmetrically distributed upper and lower connecting mechanisms and two groups of symmetrically distributed left and right connecting mechanisms, the upper and lower connecting mechanisms include multiple positioning pin mounting holes and multiple longitudinal bolt holes, the multiple positioning pin mounting holes are evenly distributed, the multiple longitudinal bolt holes are evenly distributed, the positioning pin mounting holes and the longitudinal bolt holes are cross-arranged, and the left and right connecting mechanisms include multiple evenly distributed circumferential bolt holes.

[0011] Furthermore, each of the block joints is provided with a water stop strip and a sealing gasket.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: the present invention adopts a double-layer stacked oval shield tunnel, which plays a greater role in limiting the residential red line in downtown areas of cities, improving the comprehensive utilization rate of underground space and effectively controlling the risk of crossing. Compared with a single-hole single-line overlapping tunnel, it can realize the one-time excavation and forming of an upper and lower parallel double-line tunnel, and has the advantages of saving land, avoiding or reducing the demolition of buildings and structures, avoiding the risk of upper and lower overlapping crossing construction, effectively controlling the deformation of the tunnel structure, and avoiding the cross-influence of train vibration in multi-hole tunnels. Therefore, the double-layer stacked oval shield tunnel described in the present invention has obvious optimization of the risk control of the superimposed influence between tunnel groups and the surrounding environment, which will greatly reduce the safety risk of such tunnel engineering construction, and has a relatively obvious promotion value and practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the assembly connection structure of the segment lining ring A or B of the present invention.

[0014] Figure 2 It is a schematic diagram of the standard block facade structure of the present invention.

[0015] Figure 3 It is a schematic diagram of the adjacent block facade structure of the present invention.

[0016] Figure 4 This is a schematic diagram of the capping block facade structure of the present invention.

[0017] Figure 5 It is a schematic diagram of the T-shaped block facade structure of the present invention.

[0018] Figure 6 This is a schematic diagram of the divided elevation structure of the platform of the present invention.

[0019] Figure 7 It is a schematic diagram of the plane structure of the standard longitudinal seam of the present invention.

[0020] Figure 8 It is a schematic diagram of the plane structure of the standard annular seam of the present invention.

[0021] Figure numbers: 1-RH-B1 block; 2-RH-B2 block; 3-RH-B3 block; 4-RH-T1 block; 5-RH-T2 block; 6-RH-PT block; 7-RH-B4 block; 8-RH-L1 block; 9-RH-L2 block; 10-RH-F block; 11-circumferential bolt; 12-longitudinal bolt; 13-locating pin mounting hole; 14-lifting hole; 15-longitudinal bolt hole; 16-circumferential bolt hole; 17-tenon. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] Embodiment: A double-layer stacked oval shield tunnel segment lining structure, the double-layer stacked oval shield tunnel segment lining structure adopts a one-time construction to form a tunnel by stacking up and down, and is excavated and assembled by a special-shaped shield machine to form a permanent tunnel lining. The lining method is as follows Figure 1 As shown, the double-layer stacked oval shield tunnel segment lining structure includes ring A and ring B. Ring A and ring B are symmetrical along the vertical center line of the tunnel. The structures of ring A and ring B are the same, and ring A and ring B are continuously alternated and staggered. The cross-sectional form of ring A and ring B is a reasonable splicing of multiple circular curves of different radii. The overall shape of ring A and ring B is pointed at the top and rounded at the bottom, and they show a good structural stress state and vertical utilization rate of underground space. Ring A and ring B both include standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks.

[0026] The double-layer stacked oval shield tunnel segment lining structure is a special-shaped structure. It is impossible to fit curves of different radii by rotating different assembly point angles like a circular structure. The double-layer stacked oval shield tunnel segment lining structure cannot be set with a universal wedge ring. Therefore, a straight ring plus left and right turning rings are used to meet the fitting of curves of different radii. The straight ring does not set the wedge amount, and the left and right turning rings comprehensively determine the wedge amount based on the fitting radius, segment ring width, equipment and construction errors.

[0027] like Figure 2-Figure 8 As shown, the standard blocks include RH-B1 block 1, RH-B2 block 2, RH-B3 block 3 and RH-B4 block 7; the T-type blocks include RH-T1 block 4 and RH-T2 block 5; the platform blocks include RH-PT block 6; the adjacent blocks include RH-L1 block 8 and RH-L2 block 9; the capping blocks include RH-F block 10, the two sides of RH-B1 block 1 are respectively assembled with RH-B2 block 2 and RH-B3 block 3 by annular bolts 11, the RH-B3 block 3 is assembled with RH-T1 block 4 by annular bolts 11, the RH-B2 block 2 is assembled with RH-T2 block 5 by annular bolts 11, and the RH- An RH-PT block 6 is arranged between the T1 block 4 and the RH-T2 block 5. The RH-T1 block 4 is connected to the RH-PT block 6 by an annular bolt 11. The RH-T2 block 5 is connected to the RH-PT block 6 by an annular bolt 11. The RH-B4 block 7 is assembled on the RH-T1 block 4 by an annular bolt 11. The RH-L1 block 8 is assembled on the RH-T2 block 5 by annular bolts 11. The RH-B4 block 7 is assembled with the RH-L2 block 9 by annular bolts 11. The RH-F block 10 is assembled on the RH-L1 block 8 by annular bolts 11. The RH-L2 block 9 and the RH-F block 10 are connected by annular bolts 11.

[0028] In order to meet the space requirements for grabbing and assembling each block, it is necessary to reasonably configure the assembly machine, jacks and other devices inside the shield machine. According to the basic shape of ring A and ring B, two sets of assembly machines distributed up and down are used to complete the assembly. The assembly order is RH-B1 block 1, RH-B2 block 2, RH-B3 block 3, RH-T1 block 4, RH-T2 block 5, RH-PT block 6, RH-B4 block 7, RH-L1 block 8, RH-L2 block 9 and RH-F block 10. Circumferential bolts 11 are set at the assembly joints for connection.

[0029] After ring A or ring B is spliced ​​into a ring, ring A and ring B are longitudinally connected by longitudinal bolts 12, and the shield tunneling is reciprocated in turn and ring A or ring B is assembled and connected to form a tunnel structure. The longitudinal bolts 12 are in the form of oblique bolts, bent bolts and other quick connectors.

[0030] The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with lifting holes 14, and the number of lifting holes 14 is at least one. The lifting holes 14 are used to facilitate the lifting of each block. At the same time, the lifting holes 14 are also used as grouting holes. The material of the lifting holes 14 is cast iron and high-strength plastic based on construction needs and is manufactured as required. The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with mortise and tenon 17, which facilitates splicing and effectively alleviates the occurrence of misalignment at the joints.

[0031] The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are also provided with two groups of symmetrically distributed upper and lower connecting mechanisms and two groups of symmetrically distributed left and right connecting mechanisms. The upper and lower connecting mechanisms include a plurality of locating pin mounting holes 13 and a plurality of longitudinal bolt holes 15. The plurality of locating pin mounting holes 13 are evenly distributed, and the plurality of longitudinal bolt holes 15 are evenly distributed. The locating pin mounting holes 13 and the longitudinal bolt holes 15 are cross-arranged. The locating pin mounting holes 13 are used for the installation of locating pins at the joints of each block. The left and right connecting mechanisms include a plurality of evenly distributed circumferential bolt holes 16. The longitudinal bolt holes 15 and the circumferential bolt holes 16 are used for the insertion of connecting bolts at the joints of each block to ensure the stability of the longitudinal and circumferential connections.

[0032] Waterstop strips and sealing pads are provided at the joints of each block to ensure that the joints of each block are waterproof.

[0033] Those skilled in the art may make other corresponding changes or deformations to the above technical methods and concepts, and all of these changes or deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A double-layer stacked oval shield tunnel segment lining structure, characterized in that: The double-layer stacked oval shield tunnel segment lining structure adopts a one-time construction method of stacking up and down to form a tunnel. The double-layer stacked oval shield tunnel segment lining structure includes a ring A and a ring B. The ring A and the ring B are symmetrical along the vertical center line of the tunnel. The structures of the ring A and the ring B are the same, and the ring A and the ring B are continuously alternated and staggered. The ring A and the ring B both include standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks.

2. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 1, characterized in that: The standard blocks include RH-B1 blocks (1), RH-B2 blocks (2), RH-B3 blocks (3) and RH-B4 blocks (7); the T-type blocks include RH-T1 blocks (4) and RH-T2 blocks (5); the platform blocks include RH-PT blocks (6); the adjacent blocks include RH-L1 blocks (8) and RH-L2 blocks (9); and the capping blocks include RH-F blocks (10).

3. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 2, characterized in that: The two sides of the RH-B1 block (1) are respectively assembled with the RH-B2 block (2) and the RH-B3 block (3) by means of annular bolts (11); the RH-T1 block (4) is assembled on the RH-B3 block (3) by means of annular bolts (11); the RH-T2 block (5) is assembled on the RH-B2 block (2) by means of annular bolts (11); an RH-PT block (6) is arranged between the RH-T1 block (4) and the RH-T2 block (5); the RH-T1 block (4) is connected to the RH-PT block (6) by means of annular bolts (11); the RH-T2 block (5) is assembled on the RH-B2 block (2) by means of annular bolts (11); The block (5) is connected to the RH-PT block (6) by an annular bolt (11); the RH-B4 block (7) is assembled on the RH-T1 block (4) by an annular bolt (11); the RH-L1 block (8) is assembled on the RH-T2 block (5) by an annular bolt (11); the RH-B4 block (7) is assembled on the RH-L2 block (9) by annular bolts (11); the RH-F block (10) is assembled on the RH-L1 block (8) by annular bolts (11); and the RH-L2 block (9) and the RH-F block (10) are connected by annular bolts (11).

4. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 1, characterized in that: After the A ring or the B ring is spliced ​​into a ring, the A ring and the B ring are longitudinally connected by longitudinal bolts (12), and the shield tunneling is reciprocated in sequence, and the A ring or the B ring is spliced ​​and connected to form a tunnel structure.

5. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 4, characterized in that: The longitudinal bolt (12) is in the form of an oblique bolt, a bent bolt or other quick connectors.

6. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 3, characterized in that: The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with hoisting holes (14), and each block can be conveniently hoisted through the hoisting holes (14). The hoisting holes (14) are also used as grouting holes. The standard blocks, T-shaped blocks, platform blocks, adjacent blocks and capping blocks are all provided with concave and convex tenons (17), and the concave and convex tenons (17) facilitate splicing and effectively alleviate the occurrence of misalignment at the joints.

7. A double-layer stacked oval shield tunnel segment lining structure as claimed in claim 6, characterized in that: The standard block, T-shaped block, platform block, adjacent block and capping block are also provided with two groups of symmetrically distributed upper and lower connection mechanisms and two groups of symmetrically distributed left and right connection mechanisms, the upper and lower connection mechanisms include a plurality of locating pin mounting holes (13) and a plurality of longitudinal bolt holes (15), the plurality of locating pin mounting holes (13) are evenly distributed, the plurality of longitudinal bolt holes (15) are evenly distributed, the locating pin mounting holes (13) and the longitudinal bolt holes (15) are cross-arranged, and the left and right connection mechanisms include a plurality of evenly distributed annular bolt holes (16).

8. The double-layer stacked oval shield tunnel segment lining structure according to claim 1, characterized in that: Each of the block joints is provided with a water stop strip and a sealing pad.

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