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Upward buoyancy test device and test method for shield segment in surrounding rock

A shield tunnel segment and buoyancy test technology, applied in the field of shield tunnel testing, can solve problems such as inaccurate detection, and achieve the effects of solving inaccurate detection, facilitating research and accurate results

Active Publication Date: 2021-09-21
TENGDA CONSTR GROUP CORP +1
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a buoyancy test device and test method for a shield segment in surrounding rock, so as to solve the problem that the buoyancy test of a shield segment can only detect a single point pressure and the detection is inaccurate

Method used

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  • Upward buoyancy test device and test method for shield segment in surrounding rock

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two ...

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Abstract

The invention belongs to the technical field of shield tests, and discloses an upward buoyancy test device and test method for shield segments in surrounding rock, the upward buoyancy test device comprises a transparent outer cylinder, a steel inner cylinder, a grouting pipe, a soil pressure box and a spring dynamometer, the steel inner cylinder is arranged in the transparent outer cylinder, and an annular building gap is formed between the steel inner cylinder and the transparent outer cylinder; and the grouting pipe is movably arranged in a building gap, the soil pressure box is embedded in the outer side wall of the steel inner cylinder, and the spring dynamometer is connected to the inner side wall of the steel inner cylinder and the pressure sensor. The transparent outer cylinder is arranged to simulate the shield excavation face, the steel inner cylinder is arranged to simulate the shield segment, the slurry is injected into the building gap formed by the transparent outer cylinder and the steel inner cylinder, the flowing condition of the slurry in the building gap can be visually observed, and the influence range of slurry time variation on shield segment floating is obtained; and therefore, the problems that only single-point pressure can be detected in the upward buoyancy test of the shield segment and upward buoyancy detection is inaccurate are solved.

Description

technical field [0001] The invention relates to the technical field of shield tunneling tests, in particular to a buoyancy test device and a test method for a shield segment in surrounding rock. Background technique [0002] With the rapid development of urban traffic, the development and utilization of underground space is also increasing. The shield tunneling method is widely used in the construction of subway tunnels because of its convenient construction, low noise and fast construction speed. In engineering practice, the excavation process of shield tunneling will disturb the surrounding soil and cause problems such as surface subsidence and uplift. If the building gap is not filled in time, the resulting stratum loss will inevitably lead to stratum deformation and tunnel structure displacement, which will endanger the safety of adjacent buildings and structures. [0003] Synchronous grouting technology is currently the best way to fill the building voids, but since t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L7/02G01L19/00G01L19/08E21D9/06E21D11/08E21D11/10
CPCG01L7/02G01L19/0007G01L19/086E21D9/0607E21D11/08E21D11/10
Inventor 孙九春王悦奚晓广潘定振张冰
Owner TENGDA CONSTR GROUP CORP
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