Treatment Methods of Unstable Expansive Soil Slope Excavation in Overlying Rock Layer in Alpine Region

Authors

SHI Xiaobo, Zhangjiakou Tongtai Expressway Service Management Co ., Ltd., Zhangjiakou , Hebei 075061 , ChinaFollow
CUI Guangyan, School of Traffic & Transportation , Beijing Jiaotong University , Beijing 100044 , China ;State Key Laboratory of Advanced Rail Autonomous Operation , Beijing Jiaotong University , Beijing 100044 , ChinaFollow
MOU Chao, School of Mining Engineering , North China University of Technology , Tangshan , Hebei 063210 , China
WEN Ye, Zhangjiakou Tongtai Expressway Investment Co ., Ltd., Zhangjiakou , Hebei 075000 , China
XIE Feng, Zhangjiakou Tongtai Expressway Investment Co ., Ltd., Zhangjiakou , Hebei 075000 , China
FU Xiaoyang, Zhangjiakou Tongtai Expressway Investment Co ., Ltd., Zhangjiakou , Hebei 075000 , China

Corresponding Author

崔广炎，男，博士，研究员.E-mail：19114072@bjtu.edu.cn

Abstract

To deeply study the treatment method for instability of highway cutting slope under the condition of expansive soil overlying rock layer in an alpine region，the comprehensive treatment method of unstable slope under this bad geology was put forward based on the unstable slope project of Zhangbei‒Shangyi Expressway.The governance protection structure consisted of a rigid protection system，drainage system，thermal insulation system，flexible protection system，and waterproof system.The rigid protection system was an anti-slide pile setting at the height of 1/3 of the first grade slope，of which parameters were calculated by cutting the slope of the rock layer in the unstable area to reduce the required anti-slide force of the remaining soil.The drainage system consisted of built-in tilting drainage pipes between the rock layer and expansive soil layer，gravel drainage layer outside the expansive soil layer after excavation of soil in unstable area，horizontal drainage pipe in the gravel layer，drainage ditch，intercepting ditch and side ditch of each platform.The thermal insulation system was a backfill soil layer and a cultivated clay layer arranged outside the gravel layer.The flexible protection system was a geogrid in the thermal insulation soil layer.The water-proof system was made of two cloth and one membrane water-proof layers planted under the clay layer on the backfill soil platform，and two cloth and one membrane water-proof layers in the contact area between the gravel layer and the anti-slide pile.The field treatment results show that this method can effectively prevent the slope from instability and failure again.

Publication Date

10-28-2024

DOI

10.14048/j.issn.1671-2579.2024.05.002

First Page

17

Last Page

24,38

Submission Date

February 2025

Recommended Citation

Xiaobo, SHI; Guangyan, CUI; Chao, MOU; Ye, WEN; Feng, XIE; and Xiaoyang, FU (2024) "Treatment Methods of Unstable Expansive Soil Slope Excavation in Overlying Rock Layer in Alpine Region," Journal of China & Foreign Highway: Vol. 44: Iss. 5, Article 2.
DOI: 10.14048/j.issn.1671-2579.2024.05.002
Available at: https://zwgl1980.csust.edu.cn/journal/vol44/iss5/2

Reference

[1]包承纲 .非饱和土的性状及膨胀土边坡稳定问题 [J].岩土工程学报 ,2004 ,26(1):1-15.BAO Chenggang .Behavior of unsaturated soil and stability of expansive soil slope [J].Chinese Journal of Geotechnical Engineering ,2004 ,26(1):1-15.
[2]SHUN C ,QI S K ,VANAPALLI X G ,et al.Stability analysis of an unsaturated expansive soil slope subjected to rainfall infiltration [J].Geomechanics and Engineering A ,2019 ,19(1):1-9
[3]张锐 ,龙明旭 ,郑健龙 ,等.土工格栅与膨胀土相互作用研究进展及思考 [J].中外公路 ,2020 ,40(增刊 2):13-20.ZHANG Rui ,LONG Mingxu ,ZHENG Jianlong ,et al .Research progress and thinking on interaction between geogrid and expansive soil [J].Journal of China & Foreign Highway ,2020 ,40(sup 2):13-20.
[4]徐永福 .膨胀土的水力作用机理及膨胀变形理论 [J].岩土工程学报 ,2020 ,42(11):1979 -1987 .XU Yongfu .Hydraulic mechanism and swelling deformation theory of expansive soils [J].Chinese Journal of Geotechnical Engineering ,2020 ,42(11):1979 -1987 .
[5]CHEN X Y ,JING X F ,LI X S ,et al.Slope crack propagation law and numerical simulation of expansive soil under wetting-drying cycles [J].Sustainability ,2023 ,15(17):5655 .
[6]肖杰 ,闫冬青 ,陈冠一 ,等.UDL水力参数对覆盖层处治边坡防渗性能影响 [J/OL ].中外公路 ,1-16[2024 -07-01].http://kns .cnki.net/kcms/detail/ 43.1363 .u.20240627 .1754 .007.html .XIAO Jie ,YAN Dongqing ,CHEN Guanyi ，et al .The Influence of UDL Hydraulic Parameters on the Anti-seepage Performance of Slope Treatment with Cover Layer [J/OL ].Journal of China & Foreign Highway ,1-16
[2024 -07-01].http://kns .cnki.net/kcms/detail/ 43.1363 .u.20240627 .1754 .007.html .
[7]TANG L ,CONG S Y ,GENG L ,et al .The effect of freeze-thaw cycling on the mechanical properties of expansive soils [J].Cold Regions Science and Technology ,2018 ,145:197-207.
[8]AMENUVOR A C ,LI G W ,WU,J T et al .Crack development in a physical model of undisturbed expansive soil slope and core sample under wet-dry cycles[J].European Journal of Environmental and Civil Engineering ,2024 ,28(4):822-843.
[9]LIU S ,GAO C ,FAN K ,et al .Repairing expansive soil channel slope with soilbags [J].Geosynthetics International ,2023 ,30(5):450-459.
[10]徐永福 .土工编织袋护坡技术的标准化研究 [J].中国标准化 ,2021 (1):144-147.XU Yongfu .Research on standardization of soilbag technology for protecting expansive soil slope [J].China Standardization ,2021 (1):144-147.
[11]XU Y F ,ZHANG H R .Design of soilbag-protected slopes in expansive soils [J].Geotextiles and Geomembranes ,2021 ,49(4):1036 -1045 .
[12]徐永福 ,程岩 ,肖杰 ,等.膨胀土滑坡和工程边坡新型防治技术研究 [J].岩土工程学报 ,2022 ,44(7):1281 -1294 .XU Yongfu ,CHENG Yan ,XIAO Jie ,et al .New prevention and control technology for expansive soil slopes [J].Chinese Journal of Geotechnical Engineering ,2022 ,44(7):1281 -1294 .
[13]肖杰 ,杨和平 ,倪啸 .北京西六环膨胀岩 (土)深路堑柔性支护处治技术 [J].中外公路 ,2010 ,30(3):38-41.XIAO Jie ,YANG Heping ,NI Xiao .Treatment technology of flexible support for expansive rock (soil) deep cutting in Beijing West Sixth Ring Road [J].Journal of China & Foreign Highway ,2010 ,30(3):38-41.
[14]ZHANG R ,LONG M X ,LAN T ,et al .Stability analysis method of geogrid reinforced expansive soil slopes and its engineering application [J].Journal of Central South University ,2020 ,27(7):1965 -1980 .
[15]李时亮 ,曾长贤 ,王亚飞 ,等.三维土工网边坡防护水土保持能力研究 [J].铁道科学与工程学报 ,2024 ,21(1):149-157.LI Shiliang ,ZENG Changxian ,WANG Yafei ,et al .Soil and water conservation capacity of slope protected by three-dimensional geonet [J].Journal of Railway Science and Engineering ,2024 ,21(1):149-157.
[16]吴镇清 ,葛允雷 ,杨果林 ,等.膨胀土路堑边坡支挡结构形式试验研究 [J].铁道建筑 ,2017 ,57(11):79-81.WU Zhenqing ,GE Yunlei ,YANG Guolin ,et al .Experimental study on retaining structure type of expansive soil cutting slope [J].Railway Engineering ,2017 ,57(11):79-81.
[17]张锐 ,赵旭 ,郑健龙 ,等.膨胀土侧向膨胀力试验研究与应用[J].中国公路学报 ,2020 ,33(9):22-31.ZHANG Rui ,ZHAO Xu ,ZHENG Jianlong ,et al .Experimental study and application of lateral swelling stress of expansive soil [J].China Journal of Highway and Transport ,2020 ,33(9):22-31.
[18]夏炎 ,刘海笑 ,刘军 .膨胀土地区土工膜结合抗滑桩结构在滑坡治理与桥梁桩基防护中的应用 [J].岩土工程学报 ,2016 ,38(增刊 1):248-252.XIA Yan ,LIU Haixiao ,LIU Jun .Application of geomembrane combined with anti-slide pile structure in expansive soil area in landslide control and bridge pile foundation protection [J].Chinese Journal of Geotechnical Engineering ,2016 ,38(sup 1):248-252.
[19]任佳丽 ,胡胜刚 ,程永辉 ,等.膨胀土高边坡险情原因分析及除险加固处理措施 [J].岩土工程学报 ,2022 ,44(增刊 1):138-142.REN Jiali ,HU Shenggang ,CHENG Yonghui ,et al .Cause analysis of dangerous situation of expansive soil high slope and reinforcement measures [J].Chinese Journal of Geotechnical Engineering ,2022 ,44(sup 1):138-142.
[20]李涛 ,王丽军 .引江济淮工程江淮分水岭膨胀土高边坡抗滑桩措施方案浅析 [J].治淮 ,2019 (7):14-16.LI Tao ,WANG Lijun .Analysis of anti-slide pile measures for expansive soil high slope in Jianghuai watershed of water diversion project from Yangtze River to Huaihe River [J].Harnessing the Huaihe River ,2019 (7):14-16.
[21]刘斯宏 ,高从容 ,程德虎 ,等.土工袋修复膨胀土边坡抗滑稳定分析与摩擦特性试验 [J].南水北调与水利科技 (中英文 ),2022 ,20(3):581-589.LIU Sihong ,GAO Congrong ,CHENG Dehu ,et al .Sliding stability analysis of soilbags-repaired expansive soil slope and experimental study on friction characteristics of soilbags [J].South-to-North Water Transfers and Water Science & Technology ,2022 ,20(3):581-589.
[22]王协群 ,郭敏 ,胡波 .土工格栅加筋膨胀土的三轴试验研究[J].岩土力学 ,2011 ,32(6):1649 -1653 .WANG Xiequn ,GUO Min ,HU Bo .Triaxial testing study of expansive soil reinforced with geogrid [J].Rock and Soil Mechanics ,2011 ,32(6):1649 -1653 .
[23]向远华 .锚杆框架梁 ‒双排抗滑桩支护膨胀土边坡工作特性分析 [J].铁道科学与工程学报 ,2013 ,10(3):62-67.XIANG Yuanhua .Characteristic analysis of frame beam with anchor and double-row anti-slid piles in expansive soil slope [J].Journal of Railway Science and Engineering ,2013 ,10(3):62-67.
[24]宁昕扬 ,曾俊 ,吕国梁 .引江济淮工程菜巢线分水岭段弱膨胀土边坡柔性综合防护方案 [J].水利水电快报 ,2022 ,43(5):67-72.NING Xinyang ,ZENG Jun ,LYU Guoliang .Flexible comprehensive protection scheme for weak expansive soil slopes in watershed section of Caizi Lake and Chao Lake of water transfer project from Yangtze River to Huaihe River [J].Express Water Resources & Hydropower Information ,2022 ,43(5):67-72.
[25]徐永福 ,程岩 ,唐宏华 .膨胀土边坡失稳特征及其防治技术标准化 [J].中南大学学报 (自然科学版 ),2022 ,53(1):1-20.XU Yongfu ,CHENG Yan ,TANG Honghua .Failure characteristics of expansive soil slope and standardization of slope slide prevention by geotextile bag [J].Journal of Central South University (Science and Technology ),2022 ,53(1):1-20.
[26]叶为民 ,孔令伟 ,胡瑞林 ,等.膨胀土滑坡与工程边坡新型防治技术与工程示范研究 [J].岩土工程学报 ,2022 ,44(7):1295 -1309.YE Weimin ,KONG Lingwei ,HU Ruilin ,et al .New prevention and treatment techniques and their applications to landslides and engineering slopes of expansive soils [J].Chinese Journal of Geotechnical Engineering ,2022 ,44(7):1295 -1309.