Comprehensive simulation test platform of large sunk shield entry-driving machine

Abstract

The invention discloses a comprehensive simulation test platform of a large sunk shield entry-driving machine, which comprises a simulated shield entry-driving machine, a soil box, a main support device, a loading system, a monitoring system, a control system and a hydraulic system, wherein the soil box is of a sunk box-shaped structure under the ground, the inner part of the soil box is provided with a starting area, a loading area and a receiving area, the walls among the areas are provided with tunnel portals, the length, the width and the height of the soil box are respectively of 24 m, 7 m and 8.5 m, and the length, the width and the height of the loading area are respectively of 10 m, 7 m and 6.7 m; and the loading system comprises lateral loading systems arranged on the walls at the left side and the right side of the loading area of the soil box and a mobile loading system arranged at the upper part of the loading area of the soil box, the lateral loading systems and the mobile loading system are all provided with multiple loading barrels, the loading barrels are driven by the hydraulic system to extrude soil in the soil box, and the mobile loading system can fluctuate by itself and move at the upper part of the loading area of the soil box. The invention can simulate the stressed state of the soil at different depths of various strata, neglect the border effect in the simulated shield driving process, simulate the overall shield driving process in one test, and reduce the influence of the loading system damage on the test.

Description

Technical field: [0001] The invention relates to a simulation test device for tunnel engineering, in particular to a comprehensive simulation test platform for a large-scale submerged shield tunneling machine, which belongs to the technical field of tunnel engineering. Background technique: [0002] In order to meet the construction needs of subways or cross-river and sea-crossing tunnels in different regions and under different geological conditions, it is necessary to select a reasonable type of shield tunneling machine according to the specific working conditions of the project. There are various methods for shield type selection, such as theoretical analysis, etc., and it is a scientific and effective method to study the characteristics of shield tunneling machines in underground tunnel construction through simulation tests, so as to choose a reasonable shield tunneling machine type. Methods. Some enterprises, scientific research institutions and universities at home an...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the defects of the existing large-scale shield tunneling simulation test platform, and provide a new type of large-scale submerged shield tunneling machine comprehensive simulation test platform, which can realize different depths of various types of strata The simulation of the stress state of the soil fully ignores the boundary effect of the simulated shield tunneling process, achieving the effect of simulating the whole process of shield tunneling construction from exit to entry in one test, and reducing the impact of loading system damage on the test

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