Tunnel inverted arch structure suitable for floor heave deformation control and method

A deformation control and arch structure technology, which is applied in tunnels, tunnel linings, earthwork drilling, etc. to achieve economic and social benefits and avoid deformation and damage.

Active Publication Date: 2020-08-07
CHINA RAILWAY 18TH BUREAU GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a tunnel invert structure and method suitable for the deformation control of the floor drum. The invert structure can improve the ability of the tunnel invert structure to resist deformation and reduce the problem of invert floating to ensure the normal operation of the tunnel and the safe operation of vehicles

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  • Tunnel inverted arch structure suitable for floor heave deformation control and method

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Embodiment 1

[0032] In a typical embodiment of the present invention, such as figure 1 As shown, a tunnel invert structure suitable for floor drum deformation control is proposed, including the secondary lining invert main body 3, the primary support invert main body 4, the invert filling part 2, the energy-absorbing anchor rod 8 and the external filling layer 7. The main body of the primary support invert 4 and the main body of the secondary lining invert 3 are reinforced concrete structures, which are formed at the bottom of the tunnel by primary support and secondary lining, and are prefabricated in advance according to the size of the tunnel to reduce the impact of the construction environment , improve the strength of the inverted arch structure.

[0033] The main body of the inverted arch is prefabricated by selecting suitable strength steel bars and concrete according to the design specifications to ensure the compactness and quality of the inverted arch structure.

[0034] The fil...

Embodiment 2

[0043] This embodiment proposes the construction method of the tunnel inverted arch structure applicable to the deformation control of the floor drum as described in Embodiment 1, which specifically includes the following steps:

[0044] 1. After the excavation of the tunnel is completed, the bottom of the tunnel is expanded in areas with poor surrounding rock conditions, and the original stratum is replaced with flexible filling materials to form an external filling layer 7;

[0045] 2. Perform initial support, choose the right time for secondary lining, transport the prefabricated blocks of the main body of the reinforced concrete inverted arch to the construction site, and perform initial support for the main body of the inverted arch 4 and secondary lining for the main body of the inverted arch 3. And, according to the construction method and principle of the anchor, the setting of the energy-absorbing anchor 8 is carried out to further strengthen the inverted arch;

[004...

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Abstract

The invention discloses a tunnel inverted arch structure suitable for floor heave deformation control and method. The structure comprises an inverted arch main body arranged at the bottom of a tunnel,wherein an inverted arch filling part is arranged above the inverted arch main body, an outer filling layer is arranged below the inverted arch main body, the inverted arch main body is fixedly provided with a plurality of energy absorbing anchor rods, and the energy absorbing anchor rods extend downwards from the inverted arch main body to penetrate through the outer filling layer. The invertedarch structure can improve the ability of the tunnel inverted arch structure to resist deformation, reduce occurrence of the floating problem of an inverted arch, and ensure the normal operation of the tunnel and the safe operation of vehicles.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a tunnel inverted arch structure and method suitable for deformation control of floor drums. Background technique [0002] In recent years, tunnel and underground engineering have developed vigorously, and the number of engineering projects is increasing, and it is accompanied by a trend of getting deeper and longer. Due to complex and changeable geological conditions, a series of accidents and disasters often occur when deep and long tunnels pass through areas of high geostress and weak strata. In the construction of high-speed railway tunnels, high-speed trains put forward higher requirements for the smoothness and stability of the track line. Once the floor of the tunnel becomes unstable and damaged, it will seriously threaten the safety of the train, and it will take a lot of manpower and material resources to carry out Therefore, the strength, stiffne...

Claims

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Application Information

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IPC IPC(8): E21D11/18E21D11/10E21D20/02
CPCE21D11/18E21D11/10E21D20/02
Inventor 侯守江薛翊国张贯达潘建平柏成浩胡恒千公惠民王乃勇徐龙坤姚希磊周宗庆
Owner CHINA RAILWAY 18TH BUREAU GRP CO LTD
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