Shield tunnel reinforcing system of self-anchored supporting-free member bar and construction method thereof
A shield tunneling and unsupported technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as breaking force balance, safety hazards, deformation, etc., and achieve the effects of suppressing deformation, fast installation, and high bearing capacity
Pending Publication Date: 2019-12-20
CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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Problems solved by technology
[0003] The vicinity of engineering construction or changes in the underground environment around the shield tunnel will inevitably break the force balance of the existing structure, resulting in certain deformations and even potential safety hazards
Method used
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[0041] The present invention will be described in detail below in combination with specific embodiments.
[0042] The invention relates to a self-anchored shield tunnel reinforcement system without supporting rods, which is close to the inner side of the existing shield tunnel A, assembled into a ring by a plurality of arc-shaped support blocks B in the circular direction, and then assembled in a longitudinal direction with multiple rings composition. Shield tunnel A is a prefabricated reinforced concrete structure or steel pipe sheet. The support block B is provided with longitudinal tenon 7 and longitudinal tenon 8 on both sides of the ring, and ring tenon 9 and ring tenon 10 on both sides of the longitudinal direction. The ring and longitudinal adjacent support blocks B pass through The mortise and tenon of each other are assembled to form a self-anchoring unsupported rod system. The circumferential joints of the support block B and the circumferential segment joints C ar...
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Abstract
The invention relates to a shield tunnel reinforcing system of a self-anchored supporting-free member bar and a construction method thereof. The shield tunnel reinforcing system is tightly attached tothe inner side of an existing shield tunnel, and is formed in a manner that multiple annular arc supporting blocks are spliced into a ring, and longitudinal multi-ring assembly is carried out. Blindmortises and tenons are arranged on the two longitudinal sides of a supporting block ring, and the adjacent supporting blocks are anchored through the blind mortises and the tenons; through reinforcing treatment of the area, affected by disturbance or deforming, of the existing shield tunnel, the structure type is simple, stress is reasonable, the advantages of steel part shield tunnel machining,rapid mounting, high bearing capacity, repeated use and the like are sufficiently used, the advantage of a concave and convex mortise and tenon joint structure can be ingeniously used, the effective self-anchored supporting-free member bar reinforcing system is rapidly formed, the deforming can be effectively restrained, structure safety and ovality needs of the shield tunnel can be ensured, and the reinforced shield tunnel has the normal passing capacity.
Description
technical field [0001] The invention belongs to the technical field of tunnels and underground engineering, and in particular relates to a self-anchored shield tunnel reinforcement system without supporting rods and a construction method thereof. Background technique [0002] With the continuous improvement of construction technology, construction level and construction requirements, more and more new techniques and new construction methods are applied to the construction of tunnels and underground projects, and shield machines, as a typical representative of tunnel mechanical excavation, have gradually become widely used. It is widely used in tunnel construction in the field of traffic engineering, hydraulic engineering and urban rail transit. Especially in the construction of river-crossing tunnels and urban tunnels, shield machines have gradually become the first choice for various construction methods due to their advantages in speed, safety, high quality, environmental ...
Claims
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Login to View More IPC IPC(8): E21D11/14E21D11/15B23P15/00
CPCE21D11/14E21D11/155B23P15/00
Inventor 曹伟王立新王俊邵莹韩建杨罡汪珂胡瑞青李储军戴志仁雷永生王海祥高志宏张海
Owner CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP