Tunnel step-by-step excavation simulation device and using method

Abstract

The invention discloses a tunnel step-by-step excavation simulation device and a using method. The tunnel step-by-step excavation simulation device comprises a simulation tunnel of a hollow structure,and a rock mass simulation layer for simulating protolith strength is arranged in the simulation tunnel; an electromagnetic layer is arranged at the affected boundary in sections during blasting, anda magnet is arranged at the boundary of the simulation tunnel and the rock mass simulation layer and matched with the electromagnetic layer to work to form a blasting simulation device; the organic glue is filled between the contact surfaces; the expansion cement is filled in rock mass gaps outside the organic glue, so the rock mass is stressed; a pressure sensor, a strain gauge and a multi-pointdisplacement meter are arranged at the selected monitoring position; meanwhile, the sound wave instrument is used for monitoring the internal integrity; the monitoring device is used for monitoring data such as stress, deformation, strain, creep deformation and displacement of other positions of the simulated tunnel under the influence of disturbance generated in the whole simulated excavation process. The method can provide a basis for determining the rationality of design parameters and determining whether the selected construction method can ensure the stability of the tunnel surrounding rock, and has wide engineering practice significance and application prospects.

Description

technical field [0001] The invention belongs to the field of tunnel stress simulation experiments, and in particular relates to a step-by-step tunnel excavation simulation device and a use method. Background technique [0002] With the continuous increase of my country's population, the acceleration of urbanization and the continuous improvement of people's material living standards, many large cities have gradually experienced difficulties in housing and travel, so people's use of space has gradually shifted from above ground to underground. At the same time, in the process of the gradual development of my country's transportation network, it also "passes mountains and rivers", often building tunnels through mountains to facilitate road construction. Therefore, my country's underground engineering construction has entered a prosperous period at present. There are several or even dozens of projects under construction in underground engineering such as railway tunnels, high-s...

AI Technical Summary

Problems solved by technology

It solves the problem that the existing simulation device has no entity and cannot simulate the actual situation. At the same time, the modeling and analysis steps are relatively complicated and require a certain operating foundation. It has the characteristics of simple structure, low cost, convenient operation and wide applicability. , has extensive engineering practical significance and application prospects

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