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山东大学学报 (工学版) ›› 2025, Vol. 55 ›› Issue (4): 84-92.doi: 10.6040/j.issn.1672-3961.0.2024.015

• 土木工程 • 上一篇    

非饱和土空间分布与城市地铁基坑支护设计方法

李连祥1,2,3,郭龙德1,2,王锟毅4,王培琰1,2,车秀熙1,2,邱叶凡1,2   

  1. 1.山东大学基坑与深基础工程技术研究中心, 山东 济南 250061;2.山东大学土建与水利学院, 山东 济南 250061;3.山东高速岩土工程有限公司, 山东 济南 250102;4.中铁十七局集团第一工程有限公司, 山东 青岛 030006
  • 发布日期:2025-08-31
  • 作者简介:李连祥(1966— ),男,河北唐山人,教授,博士生导师,博士,主要研究方向为基坑工程理论与技术. E-mail:jk_doctor@163.com
  • 基金资助:
    国家自然科学基金资助项目(51508310);山东省优秀中青年科学家科研基金资助项目(BS2013SF024);济南市科技计划资助项目(201201145)

The spatial distribution of unsaturated soil and support design method of urban subway foundation pit

LI Lianxiang1,2,3, GUO Longde1,2, WANG Kunyi4, WANG Peiyan1,2, CHE Xiuxi1,2, QIU Yefan1,2   

  1. LI Lianxiang1, 2, 3, GUO Longde1, 2, WANG Kunyi4, WANG Peiyan1, 2, CHE Xiuxi1, 2, QIU Yefan1, 2(1. Research Center of Foundation Pit and Deep Foundation Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. School of Civil Engineering and Water Conservancy, Shandong University, Jinan 250061, Shandong, China;
    3. Shandong Hi-Speed Geotechnical Engineering Co., Ltd., Jinan 250102, Shandong, China;
    4. China Railway 17th Bureau Group First Engineering Co., Ltd., Qingdao 030006, Shandong, China
  • Published:2025-08-31

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摘要： 为推进非饱和土理论在基坑支护设计中的应用,以济南市为例,明确济南市非饱和土厚度分布;利用基质吸力监测手段,结合非饱和土强度试验数据,建立适用于济南非饱和土的简化土-水特征曲线;基于总黏聚力法,推导了基于饱和度参数的支护结构非饱和土水平抗力系数比例系数及土压力公式,获得适合实际工程应用的非饱和土支护一般设计方法,并用地铁基坑案例证明该方法的适用性。案例分析表明:与饱和土理论相比,采用非饱和土理论计算的支护结构内力及位移大大减小,且更加接近实际监测值。研究结果显示:现行工程勘察水平下,仅需进行典型基质吸力测量便可获得城市区域简化土-水特征曲线,建立饱和度与基质吸力关系曲线,进行非饱和土基坑支护设计。

关键词: 非饱和土, 基坑工程, 支护设计, 土-水特征曲线, 基质吸力

Abstract: In order to promote the application of unsaturated soil theory in foundation pit support design, the thickness distribution of urban unsaturated soil was defined based on Jinan City. A simplified soil-water characteristic curve suitable for Jinan unsaturated soil was established by using matrix suction monitoring and unsaturated soil strength test data. Based on the total cohesion method, the formula of horizontal resistance coefficient and soil pressure of unsaturated soil in support structure expressed by soil saturation was derived, and the general design method of unsaturated soil support suitable for practical engineering application was obtained. The applicability of this method was demonstrated by using a subway foundation pit case. The case analysis showed that the internal force and displacement of the supporting structure calculated by the unsaturated soil theory were greatly reduced compared with the saturated soil theory, and were closer to the actual monitoring value. The research result showed that under the current engineering investigation level, the typical matrix suction measurement could be used to obtain and simplify soil-water characteristic curves in urban areas, establish the relationship between saturation and matrix suction, and complete the support design of unsaturated soil foundation pit, which could provide references for the design of urban unsaturated soil foundation pit.

Key words: unsaturated soil, foundation pit engineering, support design, soil-water characteristic curve, matric suction

中图分类号: 

  • TU92
[1] 沈建文. 对降低地铁工程造价的探讨[J]. 铁道标准设计, 2003, 47(12): 88-90. SHEN Jianwen. Reducing the construction cost of metro[J]. Railway Standard Design, 2003, 47(12): 88-90.
[2] 陈正汉, 郭楠.非饱和土与特殊土力学及工程应用研究的新进展[J]. 岩土力学, 2019, 40(1): 1-54. CHEN Zhenghan, GUO Nan.New developments of mechanics and application for unsaturated soils and special soils[J].Rock and Soil Mechanics, 2019, 40(1): 1-54.
[3] 耿慧辉, 吴俊阳, 单仁亮, 等. 非饱和土强度的吸力贡献形式研究[J]. 岩土工程学报, 2012, 34(9):1598-1603. GENG Huihui, WU Junyang, SHAN Renliang, et al. Contributions of matric suction to strength of unsaturated soil[J].Chinese Journal of Geotechnical Engineering, 2012, 34(9): 1598-1603.
[4] 徐筱, 蔡国庆, 李舰, 等. 非饱和土的峰值强度特性及破坏包线模型[J]. 岩土工程学报, 2020, 42(7): 1211-1219. XU Xiao, CAI Guoqing, LI Jian,et al. Peak strength characteristics and failure envelope model of unsaturated soils[J].Chinese Journal of Geotechnical Engineering, 2020, 42(7): 1211-1219.
[5] 中华人民共和国住房和城乡建设部. 建筑基坑支护技术规程:JGJ120—2012[S]. 北京: 中国建筑工业出版社, 2012.
[6] LU N, WILLIAM J. LIKO S. 非饱和土力学[M]. 韦昌富, 侯龙, 简文星, 译. 北京: 北京高等教育出版社, 2012.
[7] PUFAHL D E, FREDLUND D G, RAHARDJO H. Lateral earth pressures in expansive clay soils[J]. Canadian Geotechnical Journal, 1983, 20(2): 228-241.
[8] VAHEDIFARD F, LESHCHINSKY B A, MORTEZAEI K, et al. Active earth pressures for unsaturated retaining structures[J]. Journal of Geotechnical and Geoenviron-mental Engineering, 2015, 141(11): 1-11.
[9] 吴剑敏, 李广信, 王成华. 非饱和土基质吸力对基坑支护计算的影响[J]. 工业建筑, 2003, 33(7): 6-10. WU Jianmin, LI Guangxin, WANG Chenghua. Effect of matric suction of unsaturated soil on the estimation of the load and internal force on supporting structure for deep excavation[J]. Industrial Construction, 2003, 33(7): 6-10.
[10] 杨建民, 张正, 窦国松, 等. 非饱和土土压力在盂县基坑工程中的应用[J]. 地下空间与工程学报, 2021, 17(2): 541-555. YANG Jianmin, ZHANG Zheng, DOU Guosong, et al. Earth pressures for unsaturated retaining structures and application in supported excavation in Yu County[J].Chinese Journal of Underground Space and Engineering, 2021, 17(2): 541-555.
[11] 李连祥, 刘嘉典, 李克金, 等. 济南典型地层HSS参数选取及适用性研究[J]. 岩土力学, 2019, 40(10): 4021-4029. LI Lianxiang, LIU Jiadian, LI Kejin, et al. Study of parameters selection and applicability of HSS model in typical stratum of Jinan[J]. Rock and Soil Mechanics, 2019, 40(10): 4021-4029.
[12] 李连祥, 李红波, 韩刚, 等. 济南非饱和土基坑支护设计[J]. 山东大学学报(工学版), 2023, 53(3): 41-49. LI Lianxiang, LI Hongbo, HAN Gang,et al.Support design of unsaturated soil foundation pit in Jinan[J]. Journal of Shandong University(Engineering Science), 2023, 53(3): 41-49.
[13] FREDLUND D G, MORGENSTERN N R. Stress state variables for unsaturated soils[J]. Journal of the Geotechnical Engineering Division, 1977, 103(5): 447-466.
[14] 窦远明,孙吉书,刘熙媛,等.非饱和土深基坑支护结构变形的有限元分析[J]. 岩土工程学报, 2008, 30(增刊1):91-94. DOU Yuanming, SUN Jishu, LIU Xiyuan, et al. Finite element analysis of retaining structural deformation of deep foundation pits in unsaturated soil[J]. Chinese Journal of Geotechnical Engineering, 2008, 30(Suppl.1): 91-94.
[15] 汪东林, 栾茂田, 杨庆. 重塑非饱和黏土的土-水特征曲线及其影响因素研究[J]. 岩土力学, 2009, 30(3):751-756. WANG Donglin, LUAN Maotian, YANG Qing. Experimental study of soil-water characteristic curve of remolded unsaturated clay[J]. Rock and Soil Mechanics, 2009, 30(3):751-756.
[16] 贾升安, 李春阳, 黄海峰, 等. 基于土-水特征曲线试验的非饱和土强度预测[J]. 水运工程, 2022(12):225-231. JIA Sheng'an, LI Chunyang, HUANG Haifeng, et al. Strength prediction of unsaturated soil based on SWCC test[J]. Port & Waterway Engineering, 2022(12):225-231.
[17] FREDLUND D G, RAHARDJO H. 非饱和土土力学[M]. 陈仲颐, 张在明, 陈愈炯, 等, 译. 北京: 中国建筑工业出版社, 1997.
[18] BISHOP A W.The principl of effective stress[J]. Teknisk Ukeblad, 1959, 106(39): 859-863.
[19] 中华人民共和国水利部. 土工试验规程:SL237—1999[S]. 北京: 中国水利水电出版社, 1999.
[20] VANAPALLI S K, FREDLUND D G, PUFAHL D E, et al. Model for the prediction of shear strength with respect to soil suction[J].Canadian Geotechnical Journal, 1996, 33(3): 379-392.
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