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Experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence

A technology for formation loss and shield tunneling, which is applied in educational appliances, instruments, teaching models, etc., and can solve problems such as difficulty in adapting to tunnel excavation depth and excavation diameter.

Inactive Publication Date: 2013-05-22
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a test device for stratum loss and surface subsidence induced by dynamic excavation of a shield tunnel, the purpose of which is to solve the problem that the existing indoor physical model test device is difficult to adapt to changes in tunnel excavation depth, excavation diameter and other influencing factors

Method used

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  • Experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence
  • Experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence
  • Experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence

Examples

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Embodiment

[0024] Example: Shield tunnel dynamic excavation induced formation loss and surface subsidence test device

[0025] See attached Figure 1~5 As shown, a model box 1 is included, and the model box 1 is provided with a tunnel simulation mechanism and a lifting adjustment mechanism;

[0026] The model box 1 is a rectangular box with an open top surface. The net size of the rectangular box is 2 meters × 1.5 meters × 1.7 meters (length × width × height). The rectangular box body is composed of four side panels and A bottom panel is spliced ​​together, and the four side panels are respectively the front side panel, the rear side panel, the left side panel and the right side panel. The front side panel, the rear side panel, the left side panel, the right side panel and the bottom panel are all plexiglass The length of the front side panel and the rear side panel is 2 meters, the height is 1.7 meters, and the thickness is 10 mm. The front side panel and the rear side panel are correspondi...

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Abstract

An experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence includes a model case which is provided with a tunnel simulation mechanism and lifting regulating mechanisms. The model case is formed by splicing four lateral plates and a base plate, wherein through grooves are correspondingly formed on two lateral plates which are opposite to each other. The tunnel simulation mechanism is provided with a shield pipe and a tunnel pipe, the shield pipe is sleeved outside the tunnel pipe, and at least two sets of elastic support pieces are arranged between the shield pipe and the tunnel pipe in an axial direction of the pipes. Each of the through grooves is provided with a set of lifting regulating mechanism which includes lifting plates, wherein the lifting plates are attached firmly to the lateral plates of the model case on the positions of the through grooves and connected with a climbing mechanism or a lifting mechanism, through holes are formed on the position of the lifting plates, which is corresponding to the position of the shield pipe, and the tunnel simulation mechanism is arranged in the through holes and through grooves in a penetrating mode. The experimental facility for simulating shield tunnel dynamically boring causing ground loss and surface subsidence solves the problem in existing indoor physical modeling experiment method that the influence effect and influence rule of influence factors such as cutting depth and cutting diameter on ground displacement can not be considered.

Description

Technical field [0001] The invention belongs to the field of tunnel engineering in geotechnical and underground engineering, and in particular relates to an indoor model test device that can simulate the formation loss and surface subsidence induced by the dynamic excavation of urban shield tunnels. Background technique [0002] As an important branch of urban underground engineering, subway tunnel engineering plays a vital role in solving urban traffic congestion and travel difficulties and realizing sustainable development strategies. The construction methods of subway tunnels mainly include: shield digging method, mining method, top-down digging method, open digging method, and in the development of urban underground space, shield digging with less impact on the surrounding environment is used more. law. However, the various resistances encountered by the shield machine during excavation and excavation will inevitably disturb the soil, causing stress release of the soil aroun...

Claims

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Application Information

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IPC IPC(8): G09B23/40
Inventor 朱逢斌缪林昌顾欢达张贤徐辉叶锋王非嵇晓雷
Owner SUZHOU UNIV OF SCI & TECH
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