Multi-point servo loading system for large-scale multifunctional rock and soil structure model test platform

Abstract

The invention relates to a multi-point servo loading system of a large-scale multifunctional rock-soil structure model test platform, which belongs to the technical field of external load application for simulating rock-soil structure engineering; A hydraulic system composed of oil distributors and a servo control system, wherein the loading power source is connected to the double-acting oil cylinder through a multi-way oil distributor, and the servo control system is connected to the loading power source and the multi-way oil distributor respectively; each group of double-acting The oil cylinder is composed of multiple double-acting oil cylinders with the same output; each group of double-acting oil cylinders corresponds to a multi-way oil separator, and each group of double-acting oil cylinders forms a channel, and the double-acting oil cylinders between groups and within groups are arranged in parallel and independently. This system can meet the urgent needs of the actual scientific research and engineering for the servo loading system of the automatic geotechnical structure model test with the function of maintaining the load and stabilizing the voltage and applying the long-term load accurately.

Description

technical field [0001] The invention belongs to the technical field of external load application for simulating rock and soil structure engineering, and in particular relates to a multi-point servo loading system for a large-scale multifunctional rock and soil structure model test platform. Background technique [0002] In rock engineering, the physical model test not only simulates the force and deformation characteristics of the actual structure of the project, but also can approximate the influence of complex geological defects such as faults and dislocation zones inside the rock mass on the stability of the project, overcoming the insurmountable limitations of numerical simulation. Discontinuous, nonlinear, and heterogeneous problems, so it plays an extremely important role in water conservancy, mining, tunnels and other projects and has been widely used. For example, large and medium-sized arch dams in my country have basically done physical model tests. [0003] In the ...

AI Technical Summary

Problems solved by technology

In summary, the traditional method of applying surface load at home and abroad is relatively rough, and cannot monitor the actual load on the physical model in real time and realize servo loading; and due to the effect of pipe wall friction, the actual output of the jack is generally less than the design value

At the same time, rheological simulation of geotechnical materials has played an increasingly important role in rock engineering in recent years. In the future, there will be more physical model tests that require long-term (1-3 months) continuous application of stable loads to simulate the long-term stability of rock engineering. However, the traditional jack loading may cause load relaxation when the load is applied for a long time. These all restrict the development of rock engineering physical model tests to a certain extent, and cannot meet the urgent needs of actual engineering and scientific research.

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