玉磨铁路高地温隧道降温技术及其经济研究

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Abstract Research purposes: Correct construction methods for high geothermal tunnel sector and reasonable investment are key considerations of designers in railway construction. This paper introduces a comprehensive technical and economic research on seven high geothermal tunnels in Yuxi to Mohan railway, including service gallery and single, double, triple line main tunnels. Labor cost, material and machine shift consumption are measured under certain construction parameters, technological process, technical requirements, using realistic statistical method and field measurement method. Supplementary quota of cooling measures and efficiency reduction rate of labor and machine are also analyzed afterwards, which will provide reference for perfecting the budgeting system of similar projects.
Research conclusions: (1) The consumption of labor cost, material and machine is counted, and the supplementary quota of cooling measures and the efficiency reduction rate of labor and machine in the section of high temperature are obtained. (2) Under the construction condition of grade Ⅳ surrounding rock of single-line tunnel with high ground temperature, the efficiency reduction coefficients of gradeⅠ, Ⅱ and Ⅲ are 1.256, 1.405 and 1.699. (3) The construction organization model of tunnel construction under high temperature environment is established, and the increase rate of special cooling measures for normal temperature section and high temperature section tunnel can be finally calculated. (4) The supplementary quota, efficiency reduction rate and construction organization model can provide reference for subsequent railway projects.

Key words： railway tunnel construction organization model cooling measures quota measurement efficiency reduction of labor and machine

Received: 18 March 2022

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U457+.5

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Cite this article:

LI Zhun. Technical and Economic Research on the Efficiency Reduction and Cooling Measures in High Geothermal Tunnel in Yuxi-Mohan Railway[J]. Journal of Railway Engineering Society, 2022, 39(6): 95-99.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I6/95

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