Simulation measurement system and method for influence of tunnel excavation on adjacent structure

Abstract

The invention provides a simulation measurement system for influence of tunnel excavation on an adjacent structure. The simulation measurement system comprises a structure simulation environment, a centrifugal machine, a tunnel model, a power simulation mechanism and a monitoring device; the power simulation mechanism is connected with the tunnel model and is arranged in the structure simulation environment, and the monitoring device and the centrifugal machine are both connected with the structure simulation environment; the centrifugal machine is used for providing a working environment of astable centrifugal field for the simulation measurement system; the structure simulation environment is used for simulating a structure environment influenced by tunnel excavation; the power simulation mechanism is used for simulating the jacking force of tunnel excavation or simulating the stratum loss of tunnel excavation; and the monitoring device is used for monitoring the influence of the power simulation mechanism on the environment of a structure during simulation. The system is close to an actual scene, further verification can be performed on the basis of theoretical research, mechanism research is deepened, and good consultation and suggestion are provided for actual tunnel engineering design construction and operation.

Description

technical field [0001] The invention belongs to the field of tunnel engineering in geotechnical and underground engineering, and in particular relates to a simulation measurement system and method for the influence of tunnel excavation on adjacent structures. Background technique [0002] The pipe jacking construction will disturb the surrounding environment. During the pipe jacking construction, the excavation and soil compaction of the excavation surface, the friction and shearing of the surrounding stratum by the advancement of the segment behind the tunnel, etc., will cause the stratum disturbance and make the soil experience Mechanical disturbances such as extrusion, shearing, and unloading, or water and soil loss, lead to uplift or settlement, lateral extrusion deformation, or displacement of the surrounding strata, thereby bringing potential damage to adjacent buildings (structures) and underground pipelines buried in the surrounding strata. Improper control can lead ...

AI Technical Summary

Problems solved by technology

The method of numerical simulation is relatively mature, but the main shortcomings are that the physical and mechanical parameters of the soil have a great influence on the calculation results, but due to the limitations of instruments and equipment, it is difficult to obtain accurate soil parameters, and the soil parameters Stress history and boundary conditions are difficult to fully simulate, resulting in deviations in results

The method of theoretical analysis is often limited to relatively ideal boundary conditions. Under complex working conditions, the difficulty of theoretical derivation is too high, and there are certain problems in practicality.

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