Testing device for simulating influence and active control of foundation pit excavation adopting supporting servo system on tunnel: Fid-Bau Portal

Testing device for simulating influence and active control of foundation pit excavation adopting supporting servo system on tunnel

WANG ZHE / GUO BINGLAI / WEI GANG / XU SIFA / CHANG KUAN / FENG WEIHAO

Abstract

The invention provides a test device for simulating influence and active control of foundation pit excavation adopting a supporting servo system on a tunnel. The test device comprises a model box, a simulation tunnel pipe, a foundation pit structure system, a hydraulic servo system and a measuring system. The model box is filled with soil; the foundation pit structure comprises a simulation support and a simulation diaphragm wall, a plurality of strain gauges are arranged on the outer wall of the periphery of the simulation diaphragm wall, and the simulation support adopts a servo support form; the hydraulic servo system can control the axial force applied to the simulation support; measuring sections are arranged along the axis of the simulated tunnel pipe at certain intervals, strain gauges and infrared distance measuring devices are arranged on the inner walls of the measuring sections, and the measuring system is used for acquiring measuring signals of the strain gauges and the infrared distance measuring devices. Through the device, the influence of foundation pit excavation adopting a supporting servo system on adjacent tunnel deformation can be simulated, and the influence of active control of the servo system on adjacent deformed tunnels can be researched.

本发明提供一种模拟采用支撑伺服系统的基坑开挖对隧道影响及主动控制的试验装置，包括模型箱、模拟隧道管、基坑结构系统、液压伺服系统和测量系统。模型箱内充满土体；基坑结构包括模拟支撑、模拟地连墙，所述模拟地连墙四周外壁设置若干应变片，所述模拟支撑采用伺服支撑形式；液压伺服系统可以控制施加在模拟支撑上的轴力；沿模拟隧道管轴线一定间距布置测量断面，测量断面内壁上布置有应变片以及红外线测距装置，测量系统用于获取各应变片以及红外线测距装置的测量信号。通过该装置，可以模拟采用支撑伺服系统的基坑开挖对邻近隧道变形的影响，研究伺服系统主动控制对邻近变形隧道的影响。

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