Model test method for the impact of tunnel construction on the environment based on displacement control method
A technology for tunnel construction and model testing, which is applied to teaching models, educational tools, instruments, etc., can solve problems such as undiscovered tunnel construction model tests and unseen model tests, and achieve simple, practical, easy-to-operate, and low-cost test devices Effect
Active Publication Date: 2015-10-14
SHANGHAI JIAOTONG UNIV
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However, the application of displacement control method in tunnel construction research is mostly found in theoretical analysis such as finite element simulation, but not in model test. The literature search of existing technologies has not found relevant reports on tunnel construction model test based on displacement control method.
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[0025] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0026] This embodiment provides a construction model test of a pipe jacking tunnel based on the displacement control method, with a simulated construction length of 1400 mm, a simulated tunnel design diameter of 141 mm, and a formation loss rate of 5%. The specific steps of this embodiment are as follows:
[0027] (1) According to the formation loss rate used in the model test, the required length and diameter of the tunnel deformation device are calculated, as follows:
[0028] The tunnel deform...
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The invention provides a model test method based on a displacement control method for influences of tunnel construction on the environment. The method includes the following steps that (1) according to a stratum loss ratio adopted in a model test, the length and diameter of a needed tunnel deformation device are obtained through calculation, the tunnel deformation device is formed by an inner cylinder and an outer cylinder, the inner cylinder simulates the tunnel design size, and the outer cylinder simulates the tunnel excavation size; (2) the inner cylinder is inserted into the outer cylinder, a gap between the inner cylinder and the outer cylinder is sealed, and then the tunnel deformation device is fixedly installed to a model test device; (3) the model test device is filled with model materials, a simulation structure is installed, and a measuring apparatus is installed at last; (4) collection and zeroing carried out on the measuring apparatus are completed, the outer cylinder is drawn out to conduct a test, the outer cylinder is drawn away to enable the simulation materials to fall into the gap between the inner cylinder and the outer cylinder, and stratum loss caused by tunnel construction is simulated. The test method is simple, practical, low in cost, easy to operate and suitable for test study on influences of tunnel construction on the neighboring environment.
Description
technical field [0001] The invention relates to a model test method for the impact of tunnel construction on the environment, in particular to a model test method for tunnel construction based on a displacement control method. Background technique [0002] With the rapid development of my country's urban infrastructure construction, tunnels have become an indispensable part of urban infrastructure, and the tunnel lines are getting closer and closer to various structures, and the possibility of adverse effects on the surrounding environment is increasing. Therefore, there are more and more studies on tunnel construction tests, especially model tests. [0003] When conducting model tests, it is a key point to better reflect the settlement caused by tunnel construction. Due to the complexity of the tunnel excavation construction method and the uncertainty of the soil properties, the test that directly replicates the actual tunnel excavation process often has problems such as c...
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IPC IPC(8): G09B23/04
Inventor 夏钒叶冠林卞荣刘燕平
Owner SHANGHAI JIAOTONG UNIV