| Construction of an ultra-deep diaphragm wall: a case study |
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| 作者姓名： | SUN Jie ZHANG Zi-xin HUANG Xin JU Xin |
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| 作者单位： | 1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China,1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China,1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China,1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China |
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| 基金项目： | Funded by the National Basic Research Program of China (973 Program, No.2014CB046905), the National Natural Science Foundation of China (Grant Nos. 41172249 and 51509186), and the State Key Laboratory for Geomechanics and Deep Underground Engineering (No. SKLGDUEK1303), and the funding provided by Zhuhai Da Heng Qin Company Limited (Grant No. SG25-2014-173B1). |
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| 摘 要： | This paper presents a case study on an ultra-deep diaphragm wall with a depth of 110 m constructed in Ningbo City. The in-situ application shows that using Bauer BC40 cutter machine in conjunction with cutter wheels specified for different strata would be qualified for constructing the 110 m diaphragm wall with high efficiency and precision given that the quality of slurry and poured concrete can be guaranteed. The ground settlement can be effectively controlled by using the overlapping construction method. Sliding failure as a whole characterized by pronounced lateral deformation is likely to occur in the upper muddy clay layer due to its high compressibility and sensitivity. In contrast, local collapse of trench walls tends to happen in the sandy silt strata. Furthermore, careful attention should be paid to sandy silt during the entire construction period as the vertical displacement of the sandy silt continues to develop even after concrete pouring
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| 关 键 词： | diaphragm wall soft soil quality control settlement overlapping method trench cutter BC40 |
| 收稿时间： | 2017/7/11 0:00:00 |
Construction of an ultra-deep diaphragm wall: a case study |
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| SUN Jie,ZHANG Zi-xin,HUANG Xin,JU Xin.Construction of an ultra-deep diaphragm wall: a case study[J].Journal of Chongqing University,2018,17(1):1-16. |
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| Authors: | SUN Jie ZHANG Zi-xin HUANG Xin and JU Xin |
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| Institution: | 1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China,1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China,1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China and 1.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, P. R. China;2.Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, P. R. China |
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| Abstract: | This paper presents a case study on an ultra-deep diaphragm wall with a depth of 110 m constructed in Ningbo City. The in-situ application shows that using Bauer BC40 cutter machine in conjunction with cutter wheels specified for different strata would be qualified for constructing the 110 m diaphragm wall with high efficiency and precision given that the quality of slurry and poured concrete can be guaranteed. The ground settlement can be effectively controlled by using the overlapping construction method. Sliding failure as a whole characterized by pronounced lateral deformation is likely to occur in the upper muddy clay layer due to its high compressibility and sensitivity. In contrast, local collapse of trench walls tends to happen in the sandy silt strata. Furthermore, careful attention should be paid to sandy silt during the entire construction period as the vertical displacement of the sandy silt continues to develop even after concrete pouring |
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| Keywords: | diaphragm wall soft soil quality control settlement overlapping method trench cutter BC40 |
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