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Seabed shield tunnel excavation testing device under seepage condition and method

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: 2018-09-04
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Seabed shield tunnel excavation testing device under seepage condition and method
  • Seabed shield tunnel excavation testing device under seepage condition and method
  • Seabed shield tunnel excavation testing device under seepage condition and method

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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 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 fixed base plates on both sides and an excavation module 3 in the middle. There are four water inlet holes 5 at the four corners of the fixed bottom plate, and the test water is...

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Abstract

The invention discloses a seabed shield tunnel excavation testing device under a seepage condition and a method. The device comprises a mold tank, a lifting device and a testing auxiliary device, wherein the mold tank comprises a filling tank (1), a steel bracket (2) and an excavation module (3); the filling tank (1) is mounted above the steel bracket; the excavation module is arranged in the middle of the steel bracket; the lifting device comprises a speed reduction motor (12), a screw rod (13) and a gear train (14); the testing auxiliary device comprises a first external water tank (15), a second external water tank (17), a first lifting rack (16) and a second lifting rack (18); the excavation module (3) consists of a moveable baffle plate (31) and a fixing sleeve (32). The method comprises the following steps: flattening a field, arranging equipment, preparing a soil sample, saturating a soil body, adjusting a water level, forming seepage, carrying out tests, recording data, cleaning the filing tank, and repeating the tests.

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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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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