Movable type hydraulic loading device for shield simulation test bed

Abstract

The invention discloses a movable type hydraulic loading device for a shield simulation test bed. The movable type hydraulic loading device is arranged on walls at both sides of a soil box of the shield simulation test bed and comprises a steel beam part, a pressurizing part, a lifting and translating part, quioning and fixing parts and a hydraulic system, wherein the steel beam part is used as abeam type steel structural part and laid on the side walls; the pressurizing part is arranged on the lower part of the steel beam part and comprises a plurality of loading units, and the loading units are driven by the hydraulic system to downwards squeeze soil in the soil box; the lifting and translating part is arranged on the periphery of the steel beam part and comprises a plurality of hydraulic jacking posts, and the hydraulic jacking posts are driven by the hydraulic system, can lift the steel beam part and ensures that the steel beam part translates; and the quioning and fixing parts are fixed on four corners on the upper surface of the steel beam part and fix the steel beam part by adopting a quioning mode. The invention has the characteristics of large simulation range of pressure to the soil, real simulation effect, firmness, reliability and convenient soil filling and can be applied to large-size shield tunneling simulation test beds.

Description

Technical field: [0001] The invention relates to a simulation test device for tunnel engineering, in particular to a movable hydraulic loading device for a shield simulation test bench, belonging to the technical field of tunnel engineering. Background technique: [0002] It is a scientific and effective method to study the characteristics of shield boring machine in underground tunnel construction by means of simulation test. Some enterprises, scientific research institutions and universities at home and abroad have established relevant laboratories to design and build corresponding simulation test benches to carry out this specific engineering test. For example, Shanghai Tunnel Engineering Co., Ltd. has developed a large-scale shield tunneling simulation test platform for Shield construction test. The simulation test of shield construction is to apply a certain pressure to the soil around the simulated shield tunneling machine in the simulated test platform in a certain w...

AI Technical Summary

Problems solved by technology

[0005] 1. There is a certain difference between the simulation of soil pressure by the bladder loading system and the actual situation—the bladders in the bladder loading system in the background patent are arranged along the circumference of the simulated shield machine, and only five different values ​​can be set by manual adjustment. In addition, the loading pressure of the bladder loading system is relatively small, and can only generate a soil pressure of 0.4Mpa. Therefore, the existing bladder loading system cannot fully simulate the stress state of different types of strata and different depths of soil, especially the horizontal Downward pressure changes and subsidence of the ground surface

[0006] 2. The loading bladder is prone to damage and affect the test—the bladder in the bladder loading system is a flexible component, which must be installed before filling the soil box with soil, so it is extremely vulnerable to damage during the filling process , especially the part connected to the waterway is easy to break, which leads to the interruption of the test

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