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

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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 s

Method used

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

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Example Embodiment

[0031] Example 1:

[0032] In a typical embodiment of the present invention, as figure 1 As shown, propose a kind of tunnel inverted arch structure that is applicable to the deformation control of the bottom drum, including secondary lining inverted arch main body 3, initial support inverted arch main body 4, inverted arch filling portion 2, energy-absorbing anchor rod 8 and external filling layer 7, wherein primary support inverted arch main body 4, secondary lining inverted arch main body 3 are reinforced concrete structures, and it is formed by initial support and secondary lining at the bottom of the tunnel, and prefabricated in advance according to tunnel size, reducing the impact of construction environment , to 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, so as to ensure the compactness and quality of the in...

Example Embodiment

[0042] Example 2:

[0043] This embodiment proposes the construction method of the tunnel inverted arch structure that is applicable to the deformation control of the bottom drum as described in Embodiment 1, and specifically comprises the following steps:

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

[0045] 2. Perform initial support, select a suitable opportunity to carry out secondary lining, transport the reinforced concrete inverted arch main body prefabricated block to the construction site, and perform initial support inverted arch main body 4 and secondary lining inverted arch main body 3. And, according to the construction method and principle of the anchor rod, carry out the setting of the energy-absorbing anchor rod 8, and further strengthen the inverted arch;

[0046] 3. ...

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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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