Control system for tunnel stratum loss and grouting simulation in centrifugal field

Abstract

The invention relates to a control system for tunnel stratum loss and grouting simulation in a centrifugal field. The system comprises a model case, a baffle plate, a model component, an accessory component, an operation subsystem and a centrifuge, wherein the baffle plate is arranged in the model case to divide the model case into two parts, namely a model side and an accessory side; the model component is arranged in the model side; the accessory component is arranged in the accessory side; the accessory side of the baffle plate is welded with three pieces of stiffening plates to divide theaccessory side into three spaces; the operation subsystem is connected with the accessory component; and the model case is arranged on the centrifuge. Compared with the prior art, the control system has the advantages that the control system can simulate actual conditions such as tunnel excavation, the stratum loss and tunnel grouting in the high-speed centrifugal field, better represents actual soil mass stress level in a laboratory and can acquire practical engineering rules; equipment and devices needed by making the system can be realized in the prior art; the requirements on equipment ofa centrifugal laboratory are not high and the like.

Description

technical field [0001] The invention relates to a tunnel formation simulation control system, in particular to a tunnel formation loss and grouting simulation control system in a centrifugal field. Background technique [0002] Shanghai is located on the coast of the East China Sea, and there are deep soft clay deposits widely distributed underground. It has fine soil particles (generally 0.1-0.002mm), low shear strength, high water content (w=40%), natural Large void ratio (e max =1.5), high sensitivity (S r =4-5), high compressibility and rheology and other remarkable engineering properties. In addition, the groundwater level is very high, and groundwater can be seen at 0.5-1m below the surface. Therefore, the tunnel construction in Shanghai area is very difficult and has great potential risks. In this case, the impact of the construction process on the surrounding soil cannot be ignored, and a little carelessness will lead to engineering accidents. Therefore, it is n...

AI Technical Summary

Problems solved by technology

The method of numerical simulation is relatively mature, but the main shortcomings are as follows: (1) The physical and mechanical parameters of the soil have a great influence on the calculation results, but due to the limitation of instruments and equipment, it is difficult to obtain accurate soil parameters

(2) The numerical simulation method is difficult to completely simulate the stress history and boundary conditions of the soil, resulting in deviation of the results

The shortcomings of on-site monitoring mainly include: (1) Due to the limitations of instruments and equipment and human observation factors, the on-site results have certain deviations

(2) On-site monitoring requires a lot of manpower, material resources and financial support, especially for long-term settlement monitoring, which is unrealistic and time-sensitive

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