含水率对粉质黏土隧道稳定性的影响机制

doi:10.13722/j.cnki.jrme.2022.0339

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摘要粉质黏土地层含水率变化范围大、力学性能受含水率影响大，在该地层中修建隧道含水率对隧道稳定性影响极大。基于以上背景，依托杨(柳)宣(威)高速公路大营坡隧道，开展含水率变化对粉质黏土隧道稳定性的影响研究。首先分析大营坡隧道失稳段的变形特征及其变形机制，通过三轴压缩试验得到不同含水率粉质黏土的力学参数；其次基于试验数据应用数值计算方法，研究考虑隧道周边不同区域粉质黏土含水率变化对隧道稳定性的影响机制；最终提出粉质黏土隧道失稳判别基准。研究结果表明：(1) 该地区粉质黏土具有较强的水敏性，力学性能随含水率升高显著下降，含水率达到40%时，其抗剪强度与弹性模量仅为含水率15%时的10%～20%，含水率的上升造成隧道的整体沉降，大营坡隧道最大沉降量76.7 cm；(2) 粉质黏土隧道稳定性随含水率变化可分为4个阶段：稳定阶段(15%～25%)、预警阶段(25%～27.5%)、报警阶段(27.5%～wcr)及失稳阶段(＞wcr)；(3) 拱脚区域围岩含水率升高导致地基承载力不足而无法提供足够的支护抗力，是造成初期支护整体下沉、错台及严重侵限的主要原因。

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	马凯蒙1
	张俊儒1
	徐剑1
	陈雪锋2
	任兆丹2
	冯冀蒙1

关键词 ：隧道工程, 公路隧道, 失稳机制, 三轴压缩试验, 粉质黏土, 含水率

Abstract：The water content of silty clay stratum varies widely and greatly affects the mechanical properties. The water content of silty clay stratum has great influence on tunnel stability. Thus，based on Dayingpo tunnel of Yangliu-Xuanwei expressway，the influence of water content change on the stability of tunnels in silty clay stratum was studied. Firstly，the deformation characteristics and deformation mechanism of the unstable section of Dayingpo tunnel were analyzed. The mechanical parameters of silty clay with different water content were obtained by triaxial compression test. Secondly，based on the experimental data，the influence mechanism of silty clay water content change on tunnel stability was studied by numerical calculation method. Finally，the criterion for determining the instability of silty clay tunnel was proposed. The results show that：(1) the silty clay in this area has strong water sensitivity，and its mechanical properties deteriorate significantly with the increase of water content. When the water content reaches 40%，its shear strength and elastic modulus are only 10%–20% of that when water content is 15%. The increase of water content causes the overall settlement of the tunnel，and the maximum settlement of dayingpo tunnel is 76.7 cm. (2) According to the water content，the stability of silty clay tunnel can be divided into four stages：stable stage(15%–25%)，early warning stage(25%–27.5%)，alarm stage(27.5%–wcr) and unstable stage(＞wcr). (3) The increase of water content of surrounding earth in the arch foot area leads to insufficient foundation bearing capacity and insufficient support resistance，which is the main reason for overall subsidence，misplacement and serious intrusion of initial support.

Key words： tunnelling engineering highway tunnel instability mechanism triaxial compression test silty clay moisture content

引用本文:

马凯蒙1，张俊儒1，徐剑1，陈雪锋2，任兆丹2，冯冀蒙1. 含水率对粉质黏土隧道稳定性的影响机制[J]. 岩石力学与工程学报, 2023, 42(3): 768-779.
MA Kaimeng1，ZHANG Junru1，XU Jian1，CHEN Xuefeng2，REN Zhaodan2，FENG Jimeng1. Influence mechanism of water content on tunnel stability in silty clay layer. , 2023, 42(3): 768-779.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0339 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I3/768

[1]	牛亚强，赖远明，王旭，等. 初始含水率对冻结粉质黏土变形和强度的影响规律研究[J]. 岩土力学，2016，37(2)：499-506.(NIU Yaqiang，LAI Yuanming，WANG Xu，et al. Research on influences of initial water content on deformation and strength behaviors of frozen silty clay[J]. Rock and Soil Mechanics，2016，37(2)：499-506.(in Chinese))
[2]	胡田飞，刘建坤，房建宏，等. 冻融循环下压实度对粉质黏土力学性质影响的试验研究[J]. 岩石力学与工程学报，2017，36(6)：1 495-1 503.(HU Tianfei，LIU Jiankun，FANG Jianhong，et al. Experimental study on the effect of cyclic freezing-thawing on mechanical properties of silty clay with different degrees of compaction[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(6)：1 495-1 503.(in Chinese))
[9]	武朝军，叶冠林，王建华. 上海浅部土层压缩指数与天然含水率的关系[J]. 岩土力学，2014，35(11)：3 184-3 190.(WU Chaojun，YE Guanlin，WANG Jianhua. Relationship between compression index and natural water content of Shanghai clay[J]. Rock and Soil Mechanics，2014，35(11)：3 184-3 190.(in Chinese))
[11]	赖金星，樊浩博，来弘鹏，等. 软弱黄土隧道变形规律现场测试与分析[J]. 岩土力学，2015，36(7)：2 003-2 012.(LAI Jinxing，FAN Haobo，LAI Hongpeng，et al. In-situ monitoring and analysis of tunnel deformation law in weak loess[J]. Rock and Soil Mechanics，2015，36(7)：2 003-2 012.(in Chinese))
[12]	于丽，吕城，王明年. 基于非线性M-C准则的深埋土质隧道三维塌落破坏上限分析[J]. 岩土工程学报，2019，41(6)：1 023-1 030. (YU Li，LV Cheng，WANG Mingnian. Three-dimensional upper bound limit analysis of deep soil tunnels based on nonlinear Mohr-Coulomb criterion[J]. Chinese Journal of Geotechnical Engineering，2019，41(6)：1 023-1 030.(in Chinese))
[21]	叶万军，崔晨阳，谢卓吾，等. 含水率差异对膨胀性红黏土隧道施工力学行为的影响[J]. 隧道建设，2019，39(12)：1 940-1 948.(YE Wanjun，CUI Chenyang，XIE Zhuowu，et al. Influence of water content difference on construction mechanical behavior of expansive red clay tunnel[J]. Tunnel Construction，2019，39(12)：1 940-1 948.(in Chinese))
[23]	周平，王志杰，侯伟名，等. 昔格达地层隧道局部浸湿失稳特征及突变预测研究[J]. 岩土工程学报，2020，42(3)：503-512.(ZHOU Ping，WANG Zhijie，HOU Mingwei，et al. Local slaking instability characteristics and catastrophic prediction of deep tunnels in xigeda strata[J]. Chinese Journal of Geotechnical Engineering，2020，42(3)：503-512.(in Chinese))
[24]	雷华阳，刘敏，程泽宇，等. 透明黏土盾构隧道开挖面失稳扩展过程和失稳特征研究[J/OL]. 岩石力学与工程学报，2022，DOI：10.13722/j.cnki.jrme.2021.0790.(LEI Huayang，LIU Min，CHENG Zeyu，et al. Propagation process and characteristics of shield tunnel face instability using transparent clays[J/OL]. Chinese Journal of Rock Mechanics and Engineering，2022，DOI：10.13722/j.cnki.jrme. 2021.0790.(in Chinese))
[3]	胡田飞，刘建坤，房建宏，等. 冻融循环下含水率对粉质黏土力学性质影响试验[J]. 哈尔滨工业大学学报，2017，49(12)：123-130.(HU Tianfei，LIU Jiankun，FANG Jianhong，et al. Experiment study on the effect of moisture content on mechanical properties of silty clay subjected to freeze-thaw cycling[J]. Journal of Harbin Institute of Technology，2017，49(12)：123-130.(in Chinese))
[4]	王大雁，马巍，常小晓，等. 冻融循环作用对青藏黏土物理力学性质的影响[J]. 岩石力学与工程学报，2005，24(23)：4 313-4 319. (WANG Dayan，MA Wei，CHANG Xiaoxiao，et al. Physical-mechanical properties changes of Qinghai—Tibet clay due to cyclic freezing and thawing[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(23)：4 313-4 319.(in Chinese))
[6]	黄志全，陈宇，宋日英，等. 三门峡地区黄土状粉质黏土非饱和性质试验研究[J]. 岩土力学，2010，31(6)：1 759-1 762.(HUANG Zhiquan，CHEN Yu，SONG Riying，et al. Experimental study of unsaturated loess-like silty clay in Sanmenxia area[J]. Rock and Soil Mechanics，2010，31(6)：1 759-1 762.(in Chinese))
[8]	李旭昶，孙德安，徐永福. 扬州土物理与力学性质指标的相关性分析[J]. 工程地质学报，2019，27(2)：333-340.(LI Xuchang，SUN Dean，XU Yongfu. Study on correlations of physical and mechanical property indexes of Yangzhou clays[J]. Journal of Engineering Geology，2019，27(2)：333-340.(in Chinese))
[10]	刘秀敏，陈从新，于群群，等. 黏土颗粒含量对土洞稳定性影响试验研究[J]. 岩石力学与工程学报，2021，40(9)：1 914-1 922.(LIU Xiumin，CHEN Congxin，YU Qunqun，et al. Experimental study on the influence of clay particle contents on the stability of soil caves[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(9)：1 914-1 922.(in Chinese))
[13]	于丽，吕城，段儒禹，等. 考虑孔隙水压力及非线性Mohr-Coulomb破坏准则下浅埋土质隧道三维塌落机制的上限分析[J]. 岩土力学，2020，41(1)：194-204.(YU Li，LV Cheng，DUAN Ruyu，et al. Upper bound limit analysis of three-dimensional collapse mechanism of shallow buried soil tunnel under pore pressure based on nonlinear Mohr-Coulomb criterion[J]. Rock and Soil Mechanics，2020，41(1)：194-204.(in Chinese))
[16]	庄丽，周顺华. 浅埋层状大跨度土质隧道变形及稳定性试验研究[J]. 岩石力学与工程学报，2008，27(增2)：3 360-3 366.(ZHUANG Li，ZHOU Shunhua. Experimental research on deformation and stability of shallow-buried large-span soil-layered tunnel[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(Supp.2)：3 360-3 366.(in Chinese))
[18]	邵珠山，崔枫，李成龙，等. 粉质黏土隧道边坡稳定性影响因素及处治技术研究[J]. 铁道科学与工程学报，2020，17(8)：2 055-2 064. (SHAO Zhushan，CUI Feng，LI Chenglong，et al. Research on influencing factors and treatment technology of stability of silt clay tunnel slope[J]. Journal of Railway Science and Engineering，2020，17(8)：2 055-2 064.(in Chinese))
[20]	李术才，陈红宾，章冲，等. 粉质黏土隧道超前支护作用效果研究[J]. 岩土力学，2017，38(增2)：287-294.(LI Shucai，CHEN Hongbin，ZHANG Chong，et al. Research on effect of advanced support in silty clay tunnel[J]. Rock and Soil Mechanics，2017，38(Supp.2)：287-294.(in Chinese))
[22]	陈丽俊，陈建勋，罗彦斌，等. 深埋大跨度绿泥石片岩隧道变形规律及合理预留变形量[J]. 中国公路学报，2021，34(6)：147-157.(CHEN Lijun，CHEN Jianxun，LUO Yanbin，et al. Deformation law and reasonable reserved deformation of deep large-span chlorite schist tunnel[J]. China Journal of Highway and Transport，2021，34(6)：147-157.(in Chinese))
[25]	陈剑平，刘经，王清，等. 含水率对分散性土抗剪强度特性影响的微观解释[J]. 吉林大学学报：地球科学版，2021，51(3)：792-803.(CHEN Jianping，LIU Jing，WANG Qing，et al. Microscopic interpretation of water content influence on shear strength of dispersive soil[J]. Journal of Jilin University：Earth Science，2021，51(3)：792-803.(in Chinese))
[28]	MA K，ZHANG J，ZHANG J，et al. Longitudinal connection effect on initial support steel frames in tunnels— Take the traffic tunnels as examples[J]. Underground Space，2022，DOI：https：//doi.org/10.1016/ j.undsp.2021.11.007.
[5]	WANG D Y，MA W，NIU Y H，et al. Effects of cyclic freezing and thawing on mechanical properties of Qinghai—Tibet clay[J]. Cold Regions Science and Technology，2007，48(1)：34-43.
[14]	展宏跃. 隧道穿越第三系粉质黏土支护结构受力研究[J].铁道工程学报，2017，34(2)：59-64.(ZHAN Hongyue. Research on the mechanical behavior of the tunnel crossing tertiary silty clay[J]. Journal of Railway Engineering Society，2017，34(2)：59-64.(in Chinese))
[26]	曾铃，李光裕，史振宁，等. 降雨入渗条件下非饱和土渗流特征试验[J]. 中国公路学报，2018，31(2)：191-199.(ZENG Ling，LI Guangyu，SHI Zhenning，et al. Experiment on seepage characteristics of unsaturated soil under rainfall infiltration[J]. China Journal of Highway and Transport，2018，31(2)：191-199.(in Chinese))
[7]	高亚琛. 白洋淀粉质黏土抗剪强度试验研究及数值模拟[硕士学位论文][D]. 保定：河北大学，2019.(GAO Yachen. Experimental study and numerical simulation on shear strength of starch clay[M. S. Thesis][D]. Baoding：Hebei University，2019.(in Chinese))
[19]	李术才，陈红宾，张晓，等. 粉质黏土隧道超前支护效应试验研究[J]. 中南大学学报：自然科学版，2019，50(4)：946-956.(LI Shucai，CHEN Hongbin，ZHANG Xiao，et al. Experimental study on advanced support effect in silty clay tunnel[J]. Journal of Central South University：Science and Technology，2019，50(4)：946-956.(in Chinese))
[15]	储文静，辛民高，蔡云廷. 上第三系土质隧道的变形特点及支护措施研究[J]. 铁道工程学报，2015，32(6)：40-44.(CHU Wenjing，XIN Mingao，CAI Yunting. Analysis of deformation characteristics and support measures in upper tertiary clay tunnel[J]. Journal of Railway Engineering Society，2015，32(6)：40-44.(in Chinese))
[17]	肖小文，阳军生，王树英，等. 第三系粉质黏土地层隧道围岩大变形分析及控制研究[J]. 铁道学报，2015，37(10)：110-116.(XIAO Xiaowen，YANG Junsheng，WANG Shuying，et al. Mechanism analysis and control of large deformation of tunnel excavated in the tertiary silty clay deposit[J]. Journal of the China Railway Society，2015，37 (10)：110-116.(in Chinese))
[27]	MA K，ZHANG J，ZHANG J，et al. Floor heave failure mechanism of large-section tunnels in sandstone with shale stratum after construction：a case study[J]. Engineering Failure Analysis，2022：106497.