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Test device and method for simulating stress of shield segments with different turning radiuses

A technology of shield segment and turning radius, which is applied in the direction of measuring devices, testing of machine/structural components, using stable tension/pressure to test material strength, etc., which can solve the problem of ignoring formation effects and asymmetry of segments with different turning radii Thrust and other issues to achieve accurate results

Pending Publication Date: 2021-11-02
LIAONING TECHNICAL UNIVERSITY +1
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Problems solved by technology

[0004] The invention provides an indoor similar simulation test device for simulating the stress of shield segments with different turning radii during shield construction and a method for using the device; The problem of asymmetrical thrust, in order to seek a relationship between the turning radius and the asymmetrical thrust of the jack

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  • Test device and method for simulating stress of shield segments with different turning radiuses
  • Test device and method for simulating stress of shield segments with different turning radiuses
  • Test device and method for simulating stress of shield segments with different turning radiuses

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Embodiment Construction

[0032] 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 part of the embodiments of the present invention, not all of them.

[0033] In order to solve the problems existing in the existing technology, such as Figure 1 to Figure 6 As shown, the present invention provides a test device for simulating the stress of shield segments with different turning radii, including an installation system, a loading system and a monitoring system; the present invention fills a similar simulation test box with similar soil and simultaneously Pressurizing and changing the thickness of the covering soil to simulate the pressure of the surrounding rock is more in line with the pressure of the segment in actual construction; compared with the stress test of the existing shield segment, the present...

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Abstract

The invention discloses a test device for simulating stress of shield segments with different turning radiuses. The test device mainly comprises an installation system, a loading system and a monitoring system. The installation system comprises a similar simulation test box, a shield segment model and a counter-force frame, the similar simulation test box is filled with similar soil, and a shield segment is buried in the middle of the similar soil; the loading system is divided into a jack and an electric pneumatic pump, and the loading system is mounted on the counter-force frame; and the monitoring system mainly comprises a displacement sensor, a stress-strain sensor and a pressure sensor. The invention further discloses a corresponding duct piece stress test method. The method comprises the steps of: installing the duct piece stress test device; simulating surrounding rock pressure; performing symmetrical thrust loading on the duct piece; carrying out multi-group asymmetric thrust loading on the duct piece, and simulating different turning radiuses; and processing the recorded data, and analyzing a result. In the test process of the shield segments, the influence of surrounding rock pressure on the stress of the segments is considered, multiple sets of asymmetric thrust are applied to the segments with different radians through the jack, and the stress conditions of the shield segments with different turning radiuses are simulated more truly.

Description

technical field [0001] The invention relates to the field of shield tunneling segment tests, in particular to a device and method for simulating the force test of shield tunneling segments with different turning radii. Background technique [0002] With the rapid development of underground rail transit, the shield tunneling method has been widely used due to its advantages of high efficiency, economy and safety. In the construction process of shield tunneling, it is often necessary to use a curved tunnel with a small curvature radius to bypass obstacles such as dense buildings and various pipelines in the city; although the curved tunnel has strong route adaptability, it is different from the linear tunnel. Compared with tunnels, the design of curved tunnel segments has obvious uncertainties and typical three-dimensional mechanical behavior characteristics, and the posture correction of curved tunnels is complex, which can easily generate large eccentric forces, resulting in...

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Application Information

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IPC IPC(8): G01M13/00G01N3/12G01N3/06G01N3/02
CPCG01M13/00G01N3/12G01N3/06G01N3/02G01N2203/0003G01N2203/0026G01N2203/0044G01N2203/0075G01N2203/0073G01N2203/0676G01N2203/0682
Inventor 宋洋肖作明苑强王鑫万金宝李昂徐筱锋葛振雨
Owner LIAONING TECHNICAL UNIVERSITY
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