考虑重力和黏度时变性的隧道围岩水泥浆液扩散规律研究

韩小龙; 李朝月; 王刚; 杨志全; 冯创成; 李明; 赵灿松; 张泽昊; 贺拿; 王向鹏; 叶长文; 袁利伟; 杨太强; 喜文飞; 李小辉

doi:10.13204/j.gyjzG21090708

考虑重力和黏度时变性的隧道围岩水泥浆液扩散规律研究

doi: 10.13204/j.gyjzG21090708

1. 中铁七局集团第三工程有限公司, 西安 710026;
2. 昆明理工大学公共安全与应急管理学院, 应急管理部地质灾害风险防控与应急减灾重点实验室, 云南省高校高烈度地震山区交通走廊工程地质病害早期快速判识与防控重点实验室, 昆明 650093;
3. 河南理工大学土木工程学院, 河南焦作 454003;
4. 成都理工大学环境与土木工程学院, 成都 610059;
5. 昆明理工大学国土资源工程学院, 昆明 650093;
6. 云南师范大学地理学部, 昆明 650500

基金项目:

云南省基础研究计划面上项目(202001AT070043)。

云南省阿瑟夫·

中铁七局-昆明理工大学校企合作科研项目(YCGSHT-GC-004(2020))

云南省重点研发计划(202003AC10002)

汉院士工作站(202105AF150076)

详细信息

作者简介:
韩小龙,男,1992年出生,助理工程师。

通讯作者:
杨志全,男,1983年出生,博士,教授,博士研究生导师,yzq1983816@kust.edu.cn。

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- 被引次数: 0
出版历程
- 收稿日期: 2021-09-07

Study on Diffusion Laws for Cement Slurry in Surrounding Rock of Tunnels Considering Gravity and Time-Varying Viscosity of Slurry

1. The Third Engineering Co., Ltd., China Railway the Seventh Bureau Group Corporation, Xi’an 710026, China;
2. Faculty of Public Safety and Emergency Management, Key Laboratory of Geological Disaster Risk Prevention and Control and Emergency Disaster Reduction of Ministry of Emergency Management of the People's Republic of China, Key Laboratory of Early Rapid Identification, Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Areas of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China;
3. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, China;
4. College of Environment and Engineering, Chengdu University of Technology, Chengdu 610059, China;
5. Faculty of Land Resources Engineering, Kunming University of Science and Technology, Yunnan 650093, China;
6. Faculty of Geography Science, Yunnan Normal University, Yunnan 650500, China

摘要

摘要: 浆液重力和黏度时变性对浆液有效扩散范围及扩散形态的影响显著,而浆液扩散范围对隧道安全性起着决定性的作用。基于流固耦合理论和渗流力学理论建立了考虑浆液重力与黏度时变性耦合效应下的注浆浆液扩散方程,依托多物理场耦合软件COMSOL Multiphysics实现了在建旧寨隧道工程中风化板岩管棚注浆扩散过程的数值模拟,并由此分析了注浆压力、浆液黏度时变性与注浆时间对浆液有效扩散范围及注浆加固圈形成的影响规律。研究结果表明:考虑水泥浆液重力后,浆液在岩土体中的扩散形态呈椭球型,注浆压力越小且注浆时间越长,浆液重力对扩散形态的影响越显著;在注浆孔水平面以上浆液扩散范围远小于注浆孔水平面以下浆液扩散范围,且在注浆孔左、右两侧浆液扩散范围呈对称分布,与重力作用机制相符;浆液黏度时变性对浆液扩散距离的影响效果显著;注浆加固圈的分布形态与注浆管的埋设角度密切相关,注浆管埋设角度越小,注浆加固圈的厚度越大,合理布设小导管是获得有效注浆加固圈的关键。
- 浆液重力 /
- 流-固耦合理论 /
- 注浆加固圈
Abstract: The gravity and the time-varying viscosity of slurry have a significant impact on the effective diffusion range and diffusion form of slurry, and the diffusion range of slurry plays a decisive role in the safety of tunnels. Based on the fluid-solid coupling theory and seepage mechanics theory, a grouting slurry diffusion equation was constructed considering the coupling effect of the gravity and the time-varying viscosity of slurry. The numerical simulation of grouting diffusion processes of pipe sheds in weathered slate in the Jiuzhai tunnel engineering was performed by software COMSOL Multiphysics. The influences of grouting pressure, time variation of slurry viscosity and grouting time on effective diffusion ranges of grouteing and formation of grouting reinforcement rings were analyzed. The results showed that the diffusion pattern of slurry in rock and soil was ellipsoid in consideration of the gravity of slurry. The smaller the grouting pressure and the longer the grouting time, the more significant the influence of slurry gravity on the diffusion pattern was. The diffusion ranges of the grouting above the horizontal level of the grouting hole was much smaller than that below the horizontal level, and the diffusion ranges of the grouting on the left and right sides of the grouting hole were symmetrical, which was consonant with the mechanism of gravity. The effect of time-varying viscosity on slurry diffusion was significant. The distribution form of the grouting reinforcement ring was closely related to the embedding angle of grouting pipes. The smaller the embedding angle of grouting pipes, the larger the thickness of the grouting reinforcement ring. The reasonable arrangements of small pipes were key to obtain the effective grouting reinforcement ring.
- gravity of slurry /
- fluid-solid coupling theory /
- grouting reinforcement ring

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参考文献(15)

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