Abstract：Taking the project of Xinggangjie tunnel up-crossing No. 1 subway shield tunnel in Suzhou as the research object, the deformation data of underneath shield tunnel during SMW pile construction are analyzed, and the deformation rules during SMW pile construction process, cross-sectional and longitudinal deformation characteristics, are discussed during and after SMW pile construction.The results indicate that the deformation of shield tunnel is influenced by the disturbance of SMW pile construction and the mechanical loads. The subsidence of underneath shield tunnel gradually increase during SMW pile construction process, especially at the stage of SMW pile construction at both sides of shield tunnels, the subsidence rate is, a small deformation occurs above the tunnel, and a slight rebound occurs at the end of SMW pile construction. The deformation of shield tunnel in reinforcement area is larger than that in non-reinforcement area, the transverse shape is in a state of vertical compression and horizontal elongation, and the contour of the tunnel is an ellipse whose long axis is nearly horizontal.
王占生，潘皇宋，庄群虎，刘建国，陈秀鸣，童立元. 基坑围护SMW工法桩施工对下卧盾构隧道变形影响分析[J]. 岩土工程学报, 2019, 41(S1): 53-56.
WANG Zhan-sheng, PAN Huang-song, ZHUANG Qun-hu, LIU Jian-guo, CHEN Xiu-ming, TONG Li-yuan. Impact of pit supporting SMW pile construction on underneath shield tunnel deformation. Chinese J. Geot. Eng., 2019, 41(S1): 53-56.
[1] SHEN S L, MIURA N, KOGA H.Interaction mechanism between deep mixing column and surrounding clay during installation[J]. Canadian Geotechnical Journal, 2003, 40(2): 293-307. [2] 邓永锋, 刘松玉, 洪振舜. 水泥土搅拌桩施工扰动评价的一种方法[J]. 岩土力学, 2009, 30(3): 717-720. (DENG Yong-feng, LIU Song-yu, HONG Zhen-shun.Disturbance degree of surrounding soil induced by deep mixing column installation[J]. Rock and Soil Mechanics, 2009, 30(3): 717-720. (in Chinese)) [3] 史世雍, 蒋峰平, 刘涛. 深层搅拌桩施工对邻近运营地铁隧道影响的研究[J]. 建筑结构, 2007(11): 36-38. (SHI Shi-yong, JIANG Feng-ping, LIU Tao. research on influence of adjacent running subway tunnel due to construction of deep-mixing-piles[J]. Architecture Structure, 2007(11): 36-38. (in Chinese)) [4] 付艳斌, 张自太, 贾勤波, 等. 深层水泥土搅拌桩在运营地铁隧道上方加固中的应用[J]. 建筑技术, 2009(5): 422-424. (FU Yan-bin, ZHANG Zi-tai, JIA Qin-bo, et al.Application of dcm in strengthening above running metro[J]. Architecture Technology, 2009(5): 422-424. (in Chinese)) [5] 朱蕾. SMW工法水泥土搅拌桩施工期间相邻隧道的变形监测[J]. 铁道建筑, 2007(2): 46-47. (ZHU Lei.Deformation monitoring of adjacent tunnel during construction of SMW mixing column[J]. Railway Engineering, 2007(2): 46-47. (in Chinese))
