Modularized tunnel excavation simulation test device and assembling method thereof

Abstract

The invention provides a modularized tunnel excavation simulation test device and an assembling method thereof.The modularized tunnel excavation simulation test device comprises a driving component, the output end of the driving component is connected with a tunnel model, the driving component is used for driving the use diameter of the tunnel model, and the tunnel model is composed of at least one set of excavation modules; the tunnel excavation simulation test device comprises a driving part, a tunnel model is arranged on the driving part, a sealing assembly is arranged at the end, away from the driving part, of the tunnel model, the driving part is connected with a fixing rod piece, the fixing rod piece is used for fixing the end of the tunnel model to the driving part, and tunnel excavation simulation test devices with different lengths can be assembled according to simulation requirements; the fixed rod piece is adopted, so that the connecting strength can be ensured, the tunnel model is prevented from being separated or deformed under the action of centrifugal force, and the good linearity is always kept; and the diameter of the tunnel model can be changed under the action of the driving part, the stratum loss of the tunnel under the action of gravity is simulated, and the tunnel model is more fit with actual construction so as to ensure the accuracy and reliability of test data.

Description

technical field [0001] The invention relates to the technical field of tunnel construction test equipment, in particular to a modular tunnel excavation simulation test device and an assembly method thereof. Background technique [0002] In the construction of modern cities, the construction of underground rail transit is becoming more and more popular. However, due to the limitation of urban construction space, it is inevitable for tunnel construction to pass by or under existing facilities, such as passing by the pile foundation of a building. , passing through various underground pipes and cables, etc. In the process of tunnel construction, the volume of the actual excavated soil is greater than the volume of the completed tunnel, and the difference between the two is called stratum loss, which will lead to different degrees of settlement or uplift of the ground and tunnel Advanced shield technology is also difficult to completely prevent these deformations, and these def...

AI Technical Summary

Problems solved by technology

[0004] 1. Underground tunnel excavation is a dynamic construction process, so it is necessary to use tunnel excavation simulation test devices of different lengths to simulate the excavation progress at different nodes. Existing tunnel excavation simulation test devices usually select a section of pipe as the simulation Tunnel, however, this test model can only simulate the force condition of the tunnel under a certain excavation state. If you want to simulate the excavation progress of different nodes of the tunnel, you need to take another new section of pipe for simulation, so the reuse rate of the model Low, high material consumption, and poor flexibility;

[0005] 2. The tunnel will be affected by the surrounding soil gravity and extrusion force during the excavation process, which will cause a certain level of formation loss and deformation on the surface of the tunnel. The existing tunnel excavation simulation test device cannot perform geotechnical centrifugal tests. Adjust the radius of itself, it is not easy to simulate the formation loss after tunnel excavation, which will affect the accuracy of the results of geotechnical centrifugal test

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