寒区引水隧洞围岩冻胀特性分析

〖ＪＺ〗〖ＨＴ３Ｈ〗——以新疆布伦口水电站引水隧洞工程为例

彭小丽; 王海娟; 杨丰春; 姜海波; 李唱唱

doi:10.3973/j.issn.2096-4498.2021.02.009

隧道建设 >

2021 , Vol. 41 >Issue 2: 232 - 239

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.02.009

研究与探索

寒区引水隧洞围岩冻胀特性分析 〖ＪＺ〗〖ＨＴ３Ｈ〗——以新疆布伦口水电站引水隧洞工程为例

彭小丽 ,
王海娟 ,
杨丰春 ,
姜海波 ,
李唱唱

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（石河子大学水利建筑工程学院，新疆石河子 832003）

彭小丽(1996—)，女，四川成都人，石河子大学水利工程专业在读硕士，研究方向为寒区水工结构。E-mail: pengxl0519@163.com。通信作者：姜海波， E-mail: klaud_123@163.com。

网络出版日期: 2021-03-05

基金资助

国家自然科学基金项目（51769031）；石河子大学青年创新人才培育计划（CXRC201804）

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Analysis of SurroundingRock FrostHeaving Characteristics of Diversion Tunnel in Cold Region: a Case Study on Diversion Tunnel Project of Bulunkou Hydropower Station in Xinjiang

PENG Xiaoli ,
WANG Haijuan ,
YANG Fengchun ,
JIANG Haibo ,
LI Changchang

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（College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi 832003, Xinjiang, China）

Online published: 2021-03-05

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摘要

寒区；隧洞工程；水-冰相变；冻胀特性；冻胀力；数值模拟

关键词： 寒区; 隧洞工程; 水-冰相变; 冻胀特性; 冻胀力; 数值模拟

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彭小丽 , 王海娟 , 杨丰春 , 姜海波 , 李唱唱 .

寒区引水隧洞围岩冻胀特性分析 〖ＪＺ〗〖ＨＴ３Ｈ〗——以新疆布伦口水电站引水隧洞工程为例

[J]. 隧道建设, 2021 , 41(2) : 232 -239 . DOI: 10.3973/j.issn.2096-4498.2021.02.009

Abstract

In cold regions, frostheaving phenomenon often occurs due to the phase change of pore water in the surrounding rock of a hydraulic tunnel under the influence of low temperature. First, a thermohydromechanical coupling model for Bulunkou hydropower station in Xinjiang is established using numerical simulation software based on the theory of elastoplastic mechanics and by considering the change in the thermodynamic parameters of the surrounding rock due to the low temperature waterice phase change. Subsequently, the elastoplastic frostheaving force solution of the surrounding rock, transient temperature field, frostheaving stress, and surroundingrock displacement are calculated. Finally, the change patterns in the frost depth and the stress and deformation before and after frost heaving are obtained through analysis. The results show the following. (1) The pore water of the surrounding rock undergoes a phase change under low temperature, and the freezingcircle moves to the interior of the surrounding rock over time. The freezing depth increases with time, and the maximum freezing depth is 2.04 m under 200 days of freezing. (2) The calculated stress of the surrounding rock is between 0.392 and 0.527 MPa, and the stress increases compared with that before the frost heaving. The horizontal displacement of the surrounding rock is -0.36 mm, and the vertical displacement varies from -9.59 to -8.41 mm. The states of the surrounding rock in terms of horizontal contraction and arch settlement are 0.36 and 1.18 mm, respectively.

Key words： cold region; tunnel engineering; waterice phase change; frost heavingcharacteristics; frostheaving force; numerical simulation

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