Special-shaped shield segment structure penetrating through loess ground cracks and construction method thereof
A technology for shield segments and loess, which is applied in earthwork drilling, underground chambers, wellbore lining, etc., can solve the problems of tunnel lining construction that cannot meet cracks in loess, high safety hazards, and high construction difficulty, and achieves high efficiency. Structural stability and reliability, ensuring safety, improving overall waterproof performance and durability
Pending Publication Date: 2021-06-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology
[0005] Aiming at the technical problems existing in the prior art, the present invention provides a special-shaped shield segment structure and its construction method for crossing loess cracks, so as to solve the problem that the existing shield segments cannot meet the requirements of tunnels passing through loess cracks. Lining construction, high construction difficulty, and technical problems of great potential safety hazards
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[0047] as attached Figure 1-4 As shown, this embodiment provides a special-shaped shield segment structure that passes through cracks in the loess, including several ring segments assembled longitudinally along the tunnel axis; each ring segment is spliced sequentially by splicing segments Forming a ring, the spliced segment is a prefabricated reinforced concrete segment structure, using C50 grade concrete; the width of each spliced segment is 1000mm, and the thickness is 400mm; each ring segment is divided into six spliced segments, of which, It includes a capping block 1, two adjacent blocks 2 and three standard blocks; the three standard blocks 3 are assembled in sequence to form a lower half-ring structure, the capping block 1 is located on the top of the ring segment, and the two sides of the capping block 1 are respectively passed through an adjoining block. The block 2 is spliced and fixed; the capping block 1 and the standard block 3 are wedge-shaped arc blo...
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The invention discloses a special-shaped shield segment structure penetrating through loess ground cracks and a construction method thereof. The special-shaped shield segment structure comprises a plurality of ring segments which are sequentially spliced along the axis of a tunnel; each ring segment is sequentially spliced into a ring by adopting splicing segments, and comprises a top sealing block, a plurality of adjacent blocks and a plurality of standard blocks; the plurality of standard blocks are sequentially spliced to form a lower half ring structure, the top sealing block is located at the top of the ring segment, and the two sides of the top sealing block are spliced and fixed with the lower half ring structure through the adjacent blocks; and the top sealing block and the standard blocks are wedge-shaped arc-shaped blocks, the adjacent blocks are parallelogram arc-shaped blocks, and the joints between the adjacent splicing segments are orthogonal to the loess ground cracks. The splicing segments are in a wedge-shaped arc-shaped block and parallelogram arc-shaped block combination form, and the joints between the adjacent splicing segments are kept orthogonal to the loess ground cracks, so that the damage to the tunnel structure when the ground cracks are vertically dislocated is effectively reduced, the safety of the tunnel structure is ensured, and the special-shaped shield segment structure has relatively high adaptability to the area penetrating through the ground cracks.
Description
technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a special-shaped shield segment structure passing through cracks in loess soil and a construction method thereof. Background technique [0002] With the rapid advancement of the urbanization process, the traditional ground transportation mode in the city can no longer meet the supply demand. In order to meet people's travel needs and relieve urban traffic pressure, the construction scale of urban subways continues to expand; but in the construction process of urban subways Among them, they are faced with the challenges of various special geological conditions, among which the special geological disasters of ground fissures are more serious. [0003] Ground fissure is a macroscopic geological phenomenon in which shallow rock and soil mass is cracked or dislocated under the action of natural or human factors, and cracks or deformation zones with a certain len...
Claims
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IPC IPC(8): E21D11/08E21D11/38E21D11/10
CPCE21D11/08E21D11/083E21D11/10E21D11/386
Inventor 曹振万思宇殷涛苏三庆
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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