Small-range tunnel horizontal plane model tester system for realizing multistage and master control loading

Abstract

The invention relates to a small-range tunnel horizontal plane model tester system for realizing multistage and master control loading, comprising a loading inside casing realizing direct applying and load transferring, a reaction frame outline border providing test reaction support and a bolt machinery meshed jacking and high-sensitivity pull pressure sensor measurement cooperating combined loading device, wherein the reaction frame outline border and the loading inside casing are connected by the loading device to form an integral box system; the loading inside casing employs an iterative structure of a wood board and a steel board; steel balls and self-locking screws are distributed on the wood board; a square well-shaped steel tube in the reaction frame outline border is pressed on an organic glass cover board; a bottom loaded plate is arranged on the bottom of the whole system; a bolt and a high-strength nut in the loading device are in cooperative installation; and one end of the bolt is embedded into the high-sensitivity pull pressure sensor. Due to adopting the structure, the invention solves the technical problems that the prior jack can not realize small-range and high-precision side loading and meanwhile improves the problem of loading abrasion of the loading inside casing, thereby increasing the operability and the measurement precision of tests.

Description

technical field [0001] The invention belongs to the field of test devices, and relates to similar model tests of tunnels and underground construction projects, in particular to model test research on issues such as the interaction between soil and tunnel structures and the influence of soil variation on the tunnel structure under the condition of plane strain. Background technique [0002] Similarity model test, as an important technical method for the study of mechanical analysis of tunnels and underground building structures, has been widely valued and applied at home and abroad. performance, reliability and practicality. Scholars at home and abroad have carried out long-term and in-depth research on model test methods and design of model test devices, but currently there are relatively few research results on two-dimensional plane horizontal model test device systems, mainly focusing on vertical plane In the research and design application of the model box system. Since...

AI Technical Summary

Problems solved by technology

According to specific requirements such as special loading methods, small-scale loads, and high-sensitivity self-control, it is necessary to screen existing traditional jacks. Existing traditional manual hydraulic jacks cannot be loaded sideways, and traditional screw-type mechanical jacks have too large a range, The sensitivity is low, the range of the traditional separate hydraulic jack is too large, and the control is difficult. Therefore, it is necessary to independently research and invent a new model test device system to realize the small-scale, multi-level, and main-control loading functions of the conventional model test. Side Loading in a Horizontal Model System

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