Excavation test device and method for subsea shield tunnel under seepage conditions

A technology of shield tunneling and test equipment, which is applied in the direction of measuring equipment, mechanical equipment, soil material testing, etc., and can solve the problems of unsystematic research on the coupling effect of seepage and soil arching effects

Active Publication Date: 2020-06-05
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most studies on the soil arching effect are based on dry soil conditions, and there is no systematic research on the coupling between seepage and soil arching effects

Method used

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  • Excavation test device and method for subsea shield tunnel under seepage conditions
  • Excavation test device and method for subsea shield tunnel under seepage conditions
  • Excavation test device and method for subsea shield tunnel under seepage conditions

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Embodiment Construction

[0032] Such as figure 1 As shown, the present embodiment is a subsea shield tunnel excavation test device under seepage conditions, including a model box, a lifting device and a test auxiliary device. The model box is connected with the lifting device, and the movement of the movable baffle is controlled by the lifting device to simulate excavation of a subsea shield tunnel.

[0033] Such as figure 2 and image 3 As shown, the model box includes a soil filling box 1, a steel support 2 and an excavation module 3. The soil filling box 1 is a cube, erected on the steel support 2, and its two sides with the largest area are observation panels 4 made of tempered glass, and the observation panels are fixed to the boxes on both sides by hot melt adhesive. The bottom surface of the filling box 3 is composed of the fixed bottom plates on both sides and the excavation module 3 in the middle. There are four water inlet holes 5 at the four corners of the fixed base plate, and the tes...

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Abstract

A device and method for excavating a subsea shield tunnel under seepage conditions, the device includes a model box, a lifting device and an auxiliary device for the test. The model box includes a soil filling box (1), a steel support (2), and an excavation module (3). The filling box is installed above the steel support, and the excavation module is placed in the middle of the steel support. The lifting device includes a reduction motor (12), a screw (13), and a gear set (14). The test auxiliary device includes a first external water tank (15), a second external water tank (17), a first lifting frame (16) and a second elevator (18); the excavation module (3) is composed of a movable baffle (31) and a fixed Sleeve (32) constitutes. The method includes: leveling the site, arranging equipment, preparing soil samples, saturating the soil, adjusting water levels, forming seepage, testing and recording data, clearing the filling box and repeating the test.

Description

technical field [0001] The invention relates to a test device and method for excavating a subsea shield tunnel under seepage conditions, and belongs to the technical field of subsea shield tunnel excavation. Background technique [0002] Soil arching effect widely exists in various fields of geotechnical engineering. As a classic problem in soil mechanics, it has always been a research hotspot. In the shield tunneling project, due to the loosening of the overlying soil caused by the excavation of the shield machine during the construction process, the stress redistribution of the soil in the loose area will occur, and part of the earth pressure will be transferred to the soil on both sides of the shield. Due to the existence of this soil arch effect, the earth pressure acting on the upper part of the segment will be much smaller than the full covering earth pressure. Therefore, in order to reasonably determine the overlying soil pressure of shield tunneling, the soil arch e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/00G01N33/24
CPCG01N19/00G01N33/24
Inventor 徐长节陈江武思宇刘兴旺陈锦剑其他发明人请求不公开姓名
Owner EAST CHINA JIAOTONG UNIVERSITY
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