Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels

A parallel tunnel and tunnel excavation technology, which is applied to tunnels, earthwork drilling, mining equipment, etc., can solve the problems of high construction environment requirements, and achieve the effects of convenient post-processing, avoiding impact, and simple operation

Inactive Publication Date: 2012-05-02
SHANGHAI JIAO TONG UNIV
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  • Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels
  • Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels
  • Device and method for testing influence of tunnel excavation on existing close-distance parallel tunnels

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[0037] The present invention will be further described below with reference to the drawings and embodiments, but the protection scope of the present invention should not be limited by this.

[0038] See first figure 1 , 2 3. It can be seen from the figure that the test device for the influence of tunnel excavation on existing short-distance parallel tunnels of the present invention includes:

[0039] (1) Model box 1

[0040] The model box 1 of the excavation soil simulation is assembled into a rectangular model box by three steel plates and two plexiglass panels. The channel steel reinforcement plate is arranged on the periphery of the model box, so that the steel plate and the plexiglass panel of the model box are integrated to bear the earth pressure. In addition to various external loads applied during the test, the top surface of the soil in the model box is a free surface, and various load combinations can be applied according to specific requirements. Make holes in the two ple...

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Abstract

The invention discloses a device and a method for testing influence of tunnel excavation on existing close-distance parallel tunnels. The device comprises a model box, panels at two ends of the model box are replaceable, and a plurality of orifices can be processed on the panels according to the requirements of a test and respectively correspond to the positions of existing tunnel orifices and the positions of a plurality of designed newly-excavated tunnel orifices so as to simulate iron sheet pipes of the existing tunnels, polyvinyl chloride (PVC) plastic pipes of newly-excavated tunnels, a movable type loading platform frame, a loading jack, a pipe wall displacement meter for measuring pipe wall displacement, an earth surface displacement meter for measuring characters of earth surface displacement, a strain gauge for recording pipe wall strain, a static-state strain meter and a computer. The testing device can simulate influence of round-section tunnel excavation and construction on the existing close-distance parallel tunnels under different stratum conditions at different close connecting distances and evaluate earth surface sedimentation caused by parallel excavation of a plurality of tunnels beside the existing tunnels, and test data are accurate and reliable.

Description

technical field [0001] The invention relates to tunnel engineering, in particular to a test device and method for the influence of tunnel excavation on existing short-distance parallel tunnels. Background technique [0002] In the development and utilization of underground space in large and medium-sized cities, the underground tunnel project built to alleviate the pressure of ground traffic plays an important role. Sometimes due to the limitation of the construction environment or in order to improve the utilization rate of the tunnel project, it is necessary to build a multi-functional underground transportation network in a small area, which makes the close-distance construction of underground tunnels one of the problems that engineers must solve. The excavation of the tunnel will cause the stress redistribution of the soil around the tunnel, which will cause the stress state of the existing tunnel structure in a certain area around the new tunnel to change, seriously aff...

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Application Information

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IPC IPC(8): E21D9/00
Inventor 李学峰杜守继张德煊
Owner SHANGHAI JIAO TONG UNIV
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