Tunnel pre-stressing forceinverted arch structure and construction method thereof

A construction method and a prestressed technology, which are applied in tunnels, tunnel linings, earthwork drilling and other directions, can solve problems such as easy cracking of the inverted arch of the tunnel, and achieve the effects of being beneficial to construction management, low cost and simple construction technology.

Pending Publication Date: 2019-02-15
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

[0009] The first technical problem to be solved by the present invention is to provide a tunnel prestressed inverted arch structure to solve the problem that the tunnel inverted arch is easy to crack

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  • Tunnel pre-stressing forceinverted arch structure and construction method thereof
  • Tunnel pre-stressing forceinverted arch structure and construction method thereof
  • Tunnel pre-stressing forceinverted arch structure and construction method thereof

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Embodiment Construction

[0072] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0073] see figure 1 , a tunnel prestressed inverted arch structure, including an inverted arch body 1, the two sides of the inverted arch body 1 are integrally formed with a low side wall 2, and the low side wall 2 is above the backfill line 14 of the tunnel inverted arch. Inverted arch body 1 is provided with prestressing members 3 at intervals along the tunnel axis direction to apply prestress to the inverted arch body. The fixed end and tension end of prestressi...

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Abstract

The invention discloses a tunnel pre-stressing force inverted arch structure, and further discloses a construction method of the pre-stressing force inverted arch structure. The tunnel pre-stressing force inverted arch structure comprises the an inverted arch body, pre-stressing force components which apply pre-tension to the inverted arch body are arranged in the inverted arc body in the direction of the axis of a tunnel at intervals, and the fixing ends and stretch-draw ends of the pre-stressing force components are connected with short side walls on the two sides of the inverted arc body. According to the tunnel pre-stressing force inverted arch structure and the construction method of the pre-stressing force inverted arch structure, the pre-stressing force components are pre-buried inan inverted arch for the first time, a novel thought is provided for solving the problem that the tunnel inverted arch is prone to cracking, that is to say, pre-stressing force ribs are arranged in the tunnel inverted arch, pre-tension force is exerted, tensile stress which is caused by outside load is completely or partly offset through the pre-tension force, cracking of the inverted arch and uplifting of floor are improved and postponed, and the tunnel pre-stressing force inverted arch structure and the construction method of the pre-stressing force inverted arch structure are suitable for inverted arch protection of high-crustal-stress tunnels or foundation base softening tunnels.

Description

technical field [0001] The invention belongs to the technical field of tunnel inverted arch construction, and in particular relates to a tunnel prestressed inverted arch structure and a construction method thereof. Background technique [0002] The inverted arch is one of the main components of the tunnel lining structure. It is a reverse arched structure set at the bottom of the tunnel to improve the stress conditions of the upper support structure. Under the condition of high ground stress and high water pressure, the inverted arch of the tunnel will produce upward bulging deformation, and exert force on the bottom of the inverted arch, causing the inverted arch to crack, which in turn will cause the bottom drum of the tunnel, making the line uneven. It is used for subsequent tunnels posed great danger. In order to prevent the inverted arch from cracking, measures such as support reinforcement method, pressure relief method, and construction of an inverted arch with great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D11/10
CPCE21D11/10E21D11/18
Inventor 张学民万正王立川冯涵胡涛阳军生杨峰乔世范袁立
Owner CENT SOUTH UNIV
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