Simulated water pressure loading device and method used for tunnel structure test

Abstract

The invention provides a simulated water pressure loading device and method used for a tunnel structure test. According to the invention, convenient and accurate research is provided for a non-circular section tunnel structure water pressure test and the mechanical characteristic problem under the condition that structure is under the action of water pressure is solved. The overall structure is arranged in a T type, the upper part of the overall structure is provided with a left frame body, a middle frame body and a right frame body, the lower part of the overall structure is provided with a lower frame body, force sensors are arranged in spaces of the left frame body and the right frame body, and fine tuning screws are arranged above the force sensors. A strap steel strand is connected with the force sensors by virtue of a leading sheave on a transverse shaft and wing plate locating holes of the left and right frame bodies; a base plate of the lower frame body is provided with a base plate groove; and a loading middle shaft, an upward guiding side shaft and a downward guiding side shaft are distributed in the shape of a Chinese character 'pin' in the lower frame body, the loading middle shaft is arranged in a sliding chute for a wing plate groove of the middle frame body and the base plate groove of the lower frame body, each shaft is provided with a locating leading sheave, and the position of each locating leading sheave can be regulated forward and backward. The simulated water pressure loading device and method provided by the invention are mainly applied to the tunnel structure test.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, in particular to the technical field of model testing of tunnels with non-circular cross-sections. Background technique [0002] The main lining structure of the Fushui mountain tunnel and underwater tunnel is mostly under high water pressure, and the water pressure it bears is unevenly distributed with a small top and a large bottom. During the construction and operation period, the water pressure suffered by the tunnel structure changes greatly. In addition, the current tunnel section presents a trend of large-scale development. The impact of the non-uniform water pressure on the tunnel structure during the construction and operation periods cannot be ignored. By simulating the effect and influence of small and large non-uniform water pressure on the tunnel structure, it can provide scientific and reliable test basis for the design and construction of high water pressure tunnels and u...

AI Technical Summary

Problems solved by technology

However, due to the large anchorage set between the anchor cable and the segment, the anchor cable and the segment cannot be in close contact, and the full-circumference load cannot be accurately applied, and the reaction force of the anchorage to the structure also seriously affects the mechanical characteristic accuracy of the structure. , due to the large volume of the prototype test, the hoop tension applied is very large, the operation is difficult, and the accuracy is not high

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