An indoor test simulation system for pipe jacking construction

Abstract

The invention provides an indoor test simulation system for pipe jacking construction, which includes a model box, a guide rail limit mechanism, a pipe jacking mechanism, a soil cutting mechanism, a grouting system and a displacement monitoring system. The soil is laid in the model box; the pipe jacking mechanism and the soil cutting mechanism simulate the actual pipe jacking process, enter the model box to simulate the pipe jacking construction, the grouting system simulates the actual grouting, and the displacement monitoring system is located above the box. Among them, the guide rail limit mechanism ensures the straight pipe jacking of the pipe jacking mechanism through the linear guide rail and the limit pulley, avoids the slurry overflow caused by the radial offset, and ensures that the grouting pressure is stable and controllable. The pressure sensor of the soil cutting mechanism measures the thrust and soil cutting resistance for pipe jacking in real time, and the disturbance to the surrounding soil during the pipe jacking process is measured in real time through the displacement monitoring system. The working form of the entire test simulation system is close to the actual scene, and the detection conditions are compared Comprehensive, it is of great significance to the development of pipe jacking construction.

Description

Technical field [0001] The present invention belongs to the field of underground engineering test, which involves an indoor test simulation system for top pipe construction. Background technique [0002] The top management method is a non-excavated underground pipeline construction method, which has a low construction cost and a smaller application range and has a small surrounding environment and surface settlement. Therefore, the top management method is widely used in urban pipe network and highway railway tunnel construction. The indoor model test using the top tube model test is an important means of studying control factors such as top-tube construction during the construction process of the top pipe. According to the existing technical literature, the discovery of the inventive discharge of the top tube grouting is discovered by the existing technical documentation No. 201210137982.x, the patented technology discloses a building engineering technology. Simulation experimen...

AI Technical Summary

Problems solved by technology

This device can simulate the dynamic excavation of earth pressure balance shield machine, the whole process of excavation, propulsion, assembly, ring removal, etc., but it cannot be used for the research of synchronous grouting and friction resistance in the process of pipe jacking construction. During the jacking process, the jacking direction is uncontrollable under the action of the torque of the cutter head and the self-weight of the machine head, and the deviation of the jacking axis cannot be controlled under laboratory conditions

These model devices or systems can usually only simulate a part of the working conditions in pipe jacking construction, and all of them have great limitations

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