Shield tunnel construction environment simulation unit

Abstract

Disclosed is a shield tunnel construction environment simulation unit. A foundation trench of the shield tunnel construction environment simulation unit is a rectangular reinforce concrete foundation trench. The tops of the left and right walls of the foundation trench are provided with channels. Columns on two sides of a moving reaction frame are disposed in the channels. A plurality of jacks are disposed below the moving reaction frame. The foundation trench is longitudinally divided into an environment simulation site and a starting well by a partition wall. The partition wall is provided with a shield entry. Fixed reaction grids are disposed on the left wall, right wall and front wall of the environment simulation site respectively. A plurality of horizontal jacks are disposed on the fixed reaction grids. A sliding retainer wall unit is arranged in front of the jacks and is disposed at the bottom of the environment simulation site through slides. The jacks on the fixed reaction grids and the jacks on the moving reaction frame are both connected with a hydraulic loading device. The shield tunnel construction environment simulation unit is in an open large-space structure, capable of simulating rich stratum environments, available for large-scale similar model experiments, capable of effectively eliminating boundary effect, capable of more truly reflecting the complex shield tunnel construction environment, and is highly reliable.

Description

technical field [0001] The invention relates to a shield tunnel construction environment simulation device. Background technique [0002] Using the shield tunnel construction environment simulation device to conduct the shield tunneling model test is an important method to analyze the interaction between the complex stratum environment and the shield tunnel construction, the mechanical behavior of the tunnel lining structure, and the occurrence and development of shield tunnel diseases. [0003] Shield tunneling is a method of building tunnels by advancing in the stratum to prevent soil and sand from collapsing while excavating and lining the interior. The construction method of shield tunnel is usually suitable for weak stratum, and its interaction with the surrounding stratum environment is very large. During the construction, various auxiliary construction measures shall be supplemented according to the engineering hydrogeological characteristics of the traversing stratu...

AI Technical Summary

Problems solved by technology

The construction environment of shield tunneling is complex and changeable, and often encounters weak, water-rich, broken and other stratum environments. The existing simulation system mainly uses similar materials in the model soil box to conduct a scale-down simulation test of the stratum environment. The model soil box The capacity is small, and different stratum environments can only be simulated by replacing similar materials. The stratum environment that can be simulated is simple; complex stratum environments such as bias voltage and high stress field cannot be simulated; at the same time, the shield section that can be simulated by the small-capacity model soil box The form is single, the tunneling route is fixed, and the applicable surface is narrow; it can only be used for the simulation of the shield tunneling process, ignoring the simulation of the shield tail segment assembly, shield tail ring removal, grouting and other processes, and does not simulate the tunneling in a complete sense The whole process

Of course, it is even more impossible to simulate the construction process of the shield tunnel under the complex three-dimensional space stress form and the auxiliary construction method for the construction

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