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Method and special apparatus for excavation of concealed grotto in solid model test

A solid model and cavern technology, which is used in the testing of basic structures, earthmoving machines/shovels, water conservancy projects, etc., to eliminate position errors, reduce testing costs, and avoid serious model distortion.

Inactive Publication Date: 2003-03-12
TSINGHUA UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for excavating a concealed cavern in a model test and its special equipment for the inherent complexity and obstacles in the test technology itself in the homogeneous model and the deficiencies and defects in the prior art , the method and device can not only embody the requirements of excavating concealed caverns through open caverns according to the construction process simulation, so as to reflect the continuous changes of stress field and displacement field during excavation, but also ensure the shape accuracy requirements and relative Position accuracy requirements for embedded instruments

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  • Method and special apparatus for excavation of concealed grotto in solid model test

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[0027] The basic principles, structures and specific implementation methods of the present invention will be further described below in conjunction with the accompanying drawings and embodiments, so as to further understand the present invention.

[0028] The basic idea of ​​the present invention comes from the principle of six-point positioning and the theory of reference transmission. Since the position of each part of the model in the absolute coordinate system changes complicatedly with the establishment of the initial stress field, the axis of the hidden cavern inside the model has actually become unknown. The instrument simultaneously produces a displacement axis marker to convert the absolute positioning system into a relative positioning system.

[0029] The markers of the relative positioning system must meet the following requirements; (1) The scale must be small enough relative to the model so as not to cause severe distortion of the model. (2) During the establish...

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Abstract

A method and special apparatus for excavating the concealed grotto in solid model experiment is disclosed. The axis marker shifted along with the preburied instrument is created in an absolute coordinate system. A locating method with three-stage transfer is used to convert the absolute locating system in absolute coordinate system to relative locating system. A special apparatus is desinged for excavation. Its advantages are eliminating the position error between concealed grotto and preburied instrument to maximum, and low cost.

Description

technical field [0001] The invention relates to a method and equipment for simulating an underground dynamic construction process and optimizing construction, in particular to a method and equipment for excavating a concealed cavern in a solid model test. Background technique [0002] The physical model test is an important means to directly study the stability of structural engineering, optimize the design and construction method, and verify the results of numerical simulation. In the physical model test, it is often necessary to simulate the actual excavation of the concealed cavern with a reduced scale to simulate the construction process under the condition of basically satisfying the similarity principle, so as to truly represent the continuous change of the mechanical environment of the prototype during the construction process. Underground engineering is especially important. [0003] In the prior art, the method of forming a concealed cavity in the model is to use p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E02D33/00E02F5/00
Inventor 卢达溶李仲奎洪亮石伯平张秀海
Owner TSINGHUA UNIV
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