Abstract
Deep excavations, most of those are temporary retaining structures, have not attracted enough attention from all parties involved in projects. Nowadays there have been numerous failures of deep excavations, and mostly have significant impacts on the safety of the excavation and the surrounding environment, especially in congested urban areas with poor hydrogeology and geology conditions. However, many failure cases remained unpublished and poorly explored due to complex reasons. The reported failure cases were too scarce to provide enough lessons to improve corresponding guidelines. Therefore the database needs more supplement cases. This paper briefly presents the failed case of a deep excavation in soft soil area in downtown city of Shanghai, China, which had an excavation area of about 25,000 m2 and two-story basements. According to the field investigation, forensic studies and preliminary analysis, the main reasons for the failure was pointed out. Furthermore the re-checking calculations and mitigation measures were described briefly. The direct cost of repairing and rebuilding the failed excavation was more than 20 million RMB (about 2.8 million dollars), much more expensive than savings. Preserving some redundancy in design and construction is essential. This failed case report is expected to help deep excavations attract more attention and avoid similar failures.
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References
CEN (European Committee for Standardization). Concrete-Part1: Specification, performance, production and conformity. BS EN206–1 (European Standard English version). BSI (2000)
FRWS/2018. Standard user’s manual-version 8.2[in Chinese].QiMSTAR (Tongji Qimingxing, Inc.), Shanghai, China (2018)
Gao, D.Z., Wei, D.D., Hu, Z.X.: Geotechnical properties of Shanghai soils and engineering applications. ASTM Special Technical Publication, pp. 161–177 (1986)
Gong, X.-N., Zhang, X.-C.: Excavation collapse of Hangzhou subway station in soft clay and numerical investigation based on orthogonal experiment method. 13(10), 760–767 (2012)
Hu, Z.F., Yue, Z.Q., Zhou, J., et al.: Design and construction of a deep excavation in soft soils adjacent to the Shanghai metro tunnels. Can. Geotech. J./Rev. Can. Geotech. 40(5), 933–948 (2003)
Jebelli, J., Meguid, M.A., Sedghinejad, M.K.: Excavation failure during micro-tunneling in fine sands: a case study. Tunnel. Undergr. Space Technol. 25(SI), 811–818 (2010)
MCPRC (Ministry of Construction of the People’s Republic of China). Code for design of concrete structures GB 50010-2010 (revised edition, 2015). China Architecture and Building Press, Beijing (2015). [in Chinese]
MCPRC (Ministry of Construction of the People’s Republic of China). Technical specification for retaining and protection of building foundation excavations. JGJ120–2012. China Architecture and Building Press, Beijing (2012). [in Chinese]
Long, M.: Database for retaining wall and ground movements due to deep excavations. 127(3), 203–224 (2001)
Moormann, C.: Analysis of wall and ground movements due to deep excavations in soft soil based on a new worldwide database. Soils Found. 44(1), 87–98 (2004)
SUCTC (Shanghai Urban-rural Construction and Transportation Commission). Technical code for excavation engineering. DG/TJ08–61–2018. Tongji University Press, Shanghai (2010). [in Chinese]
Wang, J.H., Xu, Z.H., Wang, W.D.: Wall and ground movements due to deep excavations in Shanghai soft soils. J. Geotech. Geo-environ. Eng. 136(7), 985–994 (2010)
Yoo, C.: Behavior of braced and anchored walls in soils overlying rock. J. Geotech. Geoenviron. Eng. 127(3), 225–233 (2001)
Acknowledgements
The authors are indebted to the Science and Technology Committee of Shanghai for its financial supporting for this study (No. 20QB1404500). Also, we appreciate the kind help of some other companies in providing in-situ information and data. Comments from reviewers and editors to improve the clarity and quality of the paper are welcome and will be appreciated.
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Xiang, W., Luo, Ys., Liang, Zr. (2021). Lessons and Mitigation Measures Learned from One Deep Excavation Failure Case. In: Shu, S., Wang, J., Souliman, M. (eds) Advances in Geotechnical Engineering & Geoenvironmental Engineering. GeoChina 2021. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-80142-7_7
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