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Analysis Method of Soil Displacement Caused by Shield Construction of Double-lane Tunnel

A technology of two-line tunneling and analysis methods, applied in tunnels, earth-moving drilling, instruments, etc.

Active Publication Date: 2019-05-14
JINAN UNIVERSITY
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  • Description
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However, the specified upper limit is empirical and general

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  • Analysis Method of Soil Displacement Caused by Shield Construction of Double-lane Tunnel
  • Analysis Method of Soil Displacement Caused by Shield Construction of Double-lane Tunnel
  • Analysis Method of Soil Displacement Caused by Shield Construction of Double-lane Tunnel

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Embodiment Construction

[0100] The present invention will be further described below in conjunction with specific examples.

[0101] The method for analyzing the displacement of soil caused by shield construction of a double-line tunnel described in this embodiment comprises the following steps:

[0102] 1. Estimation of surface settlement for double-track tunnel construction

[0103] The forces acting on the surrounding soil during tunnel shield construction mainly include propulsion resistance and torque resistance, among which the propulsion resistance mainly includes the thrust of the tunnel face, the grouting pressure and the friction between the shield body and the surrounding soil, and the torque resistance is mainly composed of Caused by frontal friction of the cutter head and side friction of the cutter head. At the same time, the displacement of the surrounding soil caused by the self-weight of the shield machine should be considered in the construction of the tunnel. Using the Mindlin ba...

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Abstract

The invention discloses a method for analyzing soil displacement caused by double-line tunnel shield construction. Construction conditions, engineering equipment and geological conditions are analyzed; the composition ratio of factors of shield construction is obtained based on the Rankine's earth pressure theory; and a finite difference model is built by applying FLAC 3D software. Single-tunnel excavation, simultaneous tunnel excavation on two lines, and tunnel excavation on the right line after completion of tunnel excavation on the left line can be conducted on models in a numerical model space respectively, and soil displacement caused by construction is analyzed according to simulation results. A soil loss analytical expression is corrected according to the geological conditions; ground surface settlement caused by each construction method in a numerical simulation background is estimated by combining the corrected soil loss analytical expression with an expression, obtained based on a Mindlin displacement solution, of ground surface settlement caused by all factors in construction; the obtained ground surface settlement is compared with a numerical simulation result; and the reliability of a numerical simulation method and that of expression simulation are verified. The method disclosed by the invention overcomes the defect that the industrial norm is insufficient, and has practical guiding significance and wide application prospect for the shield tunnel excavation technology.

Description

technical field [0001] The invention relates to the field of shield tunnel construction, in particular to a soil displacement analysis method caused by shield construction of a double-line tunnel. Background technique [0002] my country's urban rail transit is in a stage of rapid development. It is more and more common for shield tunnel construction sites to be located in buildings, underground pipelines, roads and bridges. Shield tunneling will cause horizontal movement and vertical settlement of the surrounding soil. Furthermore, it will have a series of impacts on the surrounding environment from many aspects, and serious displacement of the soil layer will bring bad consequences to the building. [0003] In the tunnel shield construction process, the influence between the shield machine, soil and buildings is a very complicated process, and there are many factors involved in it. Therefore, there are inevitably some defects in the previous research. The main reason is ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50E21D9/06
CPCE21D9/06G06F30/367
Inventor 袁鸿容伟权杨雄飞韩军
Owner JINAN UNIVERSITY
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