Simulation test device for simulating excavation construction of multiple shield tunnels

Abstract

The invention discloses a simulation test device for simulating excavation construction of multiple shield tunnels. The device comprises a box body, a plurality of hydraulic cylinders and a pluralityof bearing cylinders are horizontally arranged outside the box body, a plurality of inner supporting cylinders are arranged in the box body, the hydraulic cylinders, the inner supporting cylinders andthe bearing cylinders are coaxially arranged in a one-to-one correspondence mode, sleeves in sliding fit with the inner supporting cylinders are arranged on the outer sides of the inner supporting cylinders, the sleeves penetrate through a front end plate of the box body and are inserted into the bearing cylinders, and the sleeves are driven by the hydraulic cylinders. An observation window is arranged in each bearing cylinder. The pipe piece lining of a shield tunnel is simulated by adopting the inner supporting cylinders; the sleeves are adopted to simulate a gap outside a pipe piece liningin the actual construction process, the inner supporting cylinders and the sleeves are of a sliding fit structure, the sleeves are ejected out through an oil cylinder, an annular space generated by advancing of the sleeves can cause sinking of an upper soil body, simulation of the tunnel construction process is achieved accordingly, a simulation result is closer to the actual engineering condition, and the simulation result is more accurate and reliable.

Description

technical field [0001] The invention relates to a simulation test device, in particular to a simulation test device for simulating the excavation construction of multiple shield tunnels. Background technique [0002] In a large number of crossing projects, it is most common to rely on the shield tunneling method to construct underpassing existing lines. The shield tunneling method is a method of tunnel excavation construction using a shield machine. It has incomparable advantages such as small impact on the surrounding environment, fast construction speed, high quality and high efficiency, low labor intensity, safety and environmental protection. Therefore, the shield tunneling method has become the current The main construction method in the construction of subways in major cities and some large municipal pipelines. When a new tunnel passes through an existing tunnel at a short distance, especially when the excavation face of a new tunnel advances near the existing tunnel,...

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Problems solved by technology

[0003] The existing simulation test device is provided with an annular water bag outside the lining model. This structure will cause uneven deformation or extrusion of the water bag during the drainage process, and the thickness of the formed annular space is different, which is inconsistent with the actual situation.

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