Ventilating heat-dissipating support structure used for ultrahigh geothermal tunnel and using method

Abstract

The invention discloses a ventilating heat-dissipating support structure used for an ultrahigh geothermal tunnel. The ventilating heat-dissipating support structure comprises an initial-stage supportstructure, a waterproof layer structure, a heat insulating layer structure, a secondary lining structure, a ventilating heat-dissipating structure, a structure temperature measuring system and a transverse connecting tube, wherein the initial-stage support structure comprises an initial spraying structure and a re-spraying structure; the ventilating heat-dissipating structure is positioned in theinitial spraying structure; and the transverse connecting tube is used for connecting the ventilating heat-dissipating structure to a gas exchange system in the tunnel. According to the ventilating heat-dissipating support structure disclosed by the invention, the ventilating heat-dissipating structure is arranged in the initial-stage support structure, sub-grade type circulating ventilation is performed to realize air exchange between high-temperature gas inside the ventilating heat-dissipating structure and normal-temperature gas in the tunnel, good heat-dissipating effect is achieved, adverse effect, on the support structure, of high ground temperature is overcome, and integral durability of the funnel support structure under long-term high-temperature action is improved. The inventionfurther provides a using method of the ventilating heat-dissipating support structure used for the ultrahigh geothermal tunnel.

Description

technical field [0001] The invention belongs to the technical field of tunnel support structures, and in particular relates to a ventilation and heat dissipation support structure for ultra-high ground temperature tunnels. The invention also relates to a method for using the ventilation and heat dissipation support structure of an ultra-high ground temperature tunnel. Background technique [0002] With the vigorous development of national transportation construction, tunnel engineering and related underground engineering are gradually developing in the direction of long and deep, and high ground temperature diseases have gradually become a major problem faced by tunnel engineering. For example, during the construction of the Sangzhuling Tunnel on the Sichuan-Tibet Railway in my country, a high ground temperature of 89°C appeared; the highest ground temperature reached 60°C during the construction of the Gaoligongshan Railway Tunnel in Yunnan; ℃, and the highest drilling temp...

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Problems solved by technology

[0004] The problem to be solved by the present invention is to overcome the deficiencies of the existing technology, and provide a support structure for ultra-high ground temperature tunnels with good heat dissipation function, convenient construction, graded control, and structure temperature evaluation function, so as to solve the problem of ultra-high ground temperature conditions Practical issues such as the safety and durability of the lower tunnel structure and the high temperature of the working environment in the tunnel

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