Evaluation of improved MSD method based on centrifugal model tests on in-flight excavation of foundation pits

CAO Mingyang; MA Xianfeng

doi:10.11779/CJGE20220745

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Chinese Journal of Geotechnical Engineering > 2024 > 46(1): 190-198. > DOI: 10.11779/CJGE20220745

CAO Mingyang, MA Xianfeng. Evaluation of improved MSD method based on centrifugal model tests on in-flight excavation of foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(1): 190-198. DOI: 10.11779/CJGE20220745

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Evaluation of improved MSD method based on centrifugal model tests on in-flight excavation of foundation pits

CAO Mingyang^{1, 2,},
MA Xianfeng^{1, 2, ,}

1.
Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

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Received Date: June 10, 2022
Available Online: January 08, 2024

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Abstract

Abstract

A set of novel device for the centrifugal model tests on the whole process of excavation is developed to investigate the influences of excavation on wall displacement and ground settlement. The test data of excavation-induced ground settlement behind the retaining wall and wall deformation are compared with the published research results, and it is determined that the device can effectively simulate the excavation process under high centrifugal force field test conditions. Based on the centrifugal test data, the deformation mechanism of the foundation pit system is modified and the improved mobilizable strength design (MSD) is proposed. The improved MSD method is used to calculate the deformation curves of retaining walls for multi-pillar excavation, and the calculated results are compared with the field monitoring data. It is shown that the predicted results by the improved MSD method are consistent with the measured data, and the applicability of the improved MSD is demonstrated.
- excavation of foundation pit,
- centrifugal model test,
- in-flight excavator,
- improved MSD method

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[1]	TAN Y, WANG D L. Characteristics of a large-scale deep foundation pit excavated by the central-island technique in Shanghai soft clay. Ⅰ: bottom-up construction of the central cylindrical shaft[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013, 139(11): 1875-1893. doi: 10.1061/(ASCE)GT.1943-5606.0000928
[2]	尹利洁, 李宇杰, 朱彦鹏, 等. 兰州地铁雁园路站基坑支护监测与数值模拟分析[J]. 岩土工程学报, 2021, 43(增刊1): 111-116. doi: 10.11779/CJGE2021S1020 YIN Lijie, LI Yujie, ZHU Yanpeng, et al. Monitoring and numerical simulation of support for foundation pit at Yanyuan Road Station of Lanzhou Metro[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S1): 111-116. (in Chinese) doi: 10.11779/CJGE2021S1020
[3]	程康, 徐日庆, 应宏伟, 等. 杭州软黏土地区某30.2m深大基坑开挖性状实测分析[J]. 岩石力学与工程学报, 2021, 40(4): 851-863. CHENG Kang, XU Riqing, YING Hongwei, et al. Performance analysis of a 30.2m deep-large excavation in Hangzhou soft clay[J]. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(4): 851-863. (in Chinese)
[4]	OSMAN A S, BOLTON M D. Ground movement predictions for braced excavations in undrained clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(4): 465-477. doi: 10.1061/(ASCE)1090-0241(2006)132:4(465)
[5]	苏秀婷, 陈健, 高文龙, 等. 基于改进MSD法的软土深基坑支护侧移规律[J]. 科学技术与工程, 2021, 21(5): 2002-2010. SU Xiuting, CHEN Jian, GAO Wenlong, et al. Lateral displacement law of deep foundation pit support in soft soil based on improved MSD method[J]. Science Technology and Engineering, 2021, 21(5): 2002-2010. (in Chinese)
[6]	刘美麟, 房倩, 张顶立, 等. 基于改进MSD法的基坑开挖动态变形预测[J]. 岩石力学与工程学报, 2018, 37(7): 1700-1707. LIU Meilin, FANG Qian, ZHANG Dingli, et al. Prediction of transient deformation due to excavation based on improved MSD method[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(7): 1700-1707. (in Chinese)
[7]	马险峰, 林想, 王欣杰, 等. 间隔型基坑开挖效应的离心机模拟试验研究[J]. 岩土工程学报, 2022, 44(增刊2): 92-96. MA Xianfeng, LIN Xiang, WANG Xinjie, et al. Centrifugal model tests on excavation effect of interval foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 92-96. (in Chinese)
[8]	ZHANG G, LI M, WANG L P. Analysis of the effect of the loading path on the failure behaviour of slopes[J]. KSCE Journal of Civil Engineering, 2014, 18(7): 2080-2084. doi: 10.1007/s12205-014-1461-7
[9]	ELSHAFIE M Z E B, CHOY C K C, MAIR R J. Centrifuge modeling of deep excavations and their interaction with adjacent buildings[J]. Geotechnical Testing Journal, 2013, 36(5): 20120209. doi: 10.1520/GTJ20120209
[10]	LAM S Y, ELSHAFIE M Z E B, HAIGH S K, et al. A new apparatus for modelling excavations[J]. International Journal of Physical Modelling in Geotechnics, 2012, 12(1): 24-38. doi: 10.1680/ijpmg.2012.12.1.24
[11]	SHIBA Y, KAWASHIMA K, OBINATA N, et al. An evaluation method of longitudinal stiffness of shield tunnel linings for application to seismic response analyses[J]. Doboku Gakkai Ronbunshu, 1988(398): 319-327.
[12]	李元海, 靖洪文, 刘刚, 等. 数字照相量测在岩石隧道模型试验中的应用研究[J]. 岩石力学与工程学报, 2007, 26(8): 1684-1690. doi: 10.3321/j.issn:1000-6915.2007.08.020 LI Yuanhai, JING Hongwen, LIU Gang, et al. Study on application of digital close range photogrammetry to model test of tunnel in jointed rock masses[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(8): 1684-1690. (in Chinese) doi: 10.3321/j.issn:1000-6915.2007.08.020
[13]	DENG C H, HAIGH S K, MA X F, et al. A design method for flexible retaining walls in clay[J]. Géotechnique, 2021, 71(2): 178-187. doi: 10.1680/jgeot.19.P.095
[14]	OU C Y, HSIEH P G. A simplified method for predicting ground settlement profiles induced by excavation in soft clay[J]. Computers and Geotechnics, 2011, 38(8): 987-997. doi: 10.1016/j.compgeo.2011.06.008
[15]	POWRIE W. The Ground Movement Predictions for Braced Excavations in Undrained Clay[D]. London: University of Cambridge, 1988.
[16]	张陈蓉, 俞剑, 黄茂松. 基坑开挖对邻近地下管线影响的变形控制标准[J]. 岩土力学, 2012, 33(7): 2027-2034. ZHANG Chenrong, YU Jian, HUANG Maosong. Deformation controlling criterion of effect on underground pipelines due to foundation pit excavation[J]. Rock and Soil Mechanics, 2012, 33(7): 2027-2034. (in Chinese)
[17]	WANG Z W, NG C W W, LIU G B. Characteristics of wall deflections and ground surface settlements in Shanghai[J]. Canadian Geotechnical Journal, 2005, 42(5): 1243-54. doi: 10.1139/t05-056
[18]	WANG L Z, LIU Y J, HONG Y, et al. Predicting deformation of multipropped excavations in soft clay with a modified mobilizable strength design (MMSD) method[J]. Computers and Geotechnics, 2018, 104: 54-68. doi: 10.1016/j.compgeo.2018.07.018

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Evaluation of improved MSD method based on centrifugal model tests on in-flight excavation of foundation pits

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