High-ground-temperature surrounding rock tunnel structure simulation test device

Abstract

The invention discloses a high-ground-temperature surrounding rock tunnel structure simulation test device, and belongs to the technical field of tunnel engineering. The high-ground-temperature surrounding rock tunnel structure simulation test device comprises a stratum simulation system, a tunnel structure simulation system, a high-ground-temperature simulation system and a data acquisition system. Wherein a surrounding rock simulation layer is arranged between the stratum simulation system and the tunnel structure simulation system, the high-ground-temperature simulation system provides heatfor the stratum simulation system, the heat is transmitted to the tunnel structure simulation system through the surrounding rock simulation layer, and a data acquisition system is used for acquiringheat data in the surrounding rock simulation layer and the tunnel structure simulation system. The device can simulate a high-ground-temperature stratum and a high-ground-temperature tunnel, so thatsurrounding rock thermodynamic characteristics and heat transfer tests can be carried out on the high-ground-temperature tunnel, meanwhile, a surrounding rock simulation layer is uniformly and stablyheated in a sand bath heating mode, it is guaranteed that a surrounding rock temperature field strictly meets the axial symmetry condition, and the accuracy and scientificity of the tests are improved.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a simulation test device for tunnel structure in high ground temperature surrounding rock. Background technique [0002] The western region has a higher altitude, rich high-temperature hydrothermal activity zones, and more geothermal anomalies. With the development of transportation infrastructure in the west, especially the construction of the Sichuan-Tibet Railway, a large number of tunnel projects passing through high-temperature areas will surely emerge. [0003] The adverse effects of high ground temperature on tunnel construction are mainly manifested in the following aspects: (1) It affects the mechanical properties of concrete. High temperature can improve the early strength of concrete, but it will lead to loose internal structure, resulting in lower mechanical properties of the lining structure, and the temperature difference between the surrounding rock and ...

AI Technical Summary

Problems solved by technology

High temperature can improve the early strength of concrete, but it will cause the internal structure to be less dense, resulting in a decrease in the mechanical properties of the lining structure, and the temperature difference between the surrounding rock and the tunnel operating space will also aggravate the deterioration of the lining structure, which will endanger the long-term use safety of the lining structure

(2) Affect the bonding of lining structure and surrounding rock

(3) Affect the health of construction workers

High temperature will lead to increased sweating of construction workers, and even lead to heat stroke, dehydration, etc.

This is unfavorable to the health and working conditions of the construction workers

(4) Affect the performance of construction machinery

[0004] The high ground temperature environment will have a great adverse effect on the construction and operation of the tunnel, which is likely to cause damage to the tunnel structure, resulting in loss of life and property

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