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http://dx.doi.org/10.12989/gae.2018.14.4.315

A multivariate adaptive regression splines model for estimation of maximum wall deflections induced by braced excavation  

Xiang, Yuzhou (School of Civil Engineering, Chongqing University)
Goh, Anthony Teck Chee (School of Civil and Environmental Engineering, Nanyang Technological University)
Zhang, Wengang (School of Civil Engineering, Chongqing University)
Zhang, Runhong (School of Civil and Environmental Engineering, Nanyang Technological University)
Publication Information
Geomechanics and Engineering / v.14, no.4, 2018 , pp. 315-324 More about this Journal
Abstract
With rapid economic growth, numerous deep excavation projects for high-rise buildings and subway transportation networks have been constructed in the past two decades. Deep excavations particularly in thick deposits of soft clay may cause excessive ground movements and thus result in potential damage to adjacent buildings and supporting utilities. Extensive plane strain finite element analyses considering small strain effect have been carried out to examine the wall deflections for excavations in soft clay deposits supported by diaphragm walls and bracings. The excavation geometrical parameters, soil strength and stiffness properties, soil unit weight, the strut stiffness and wall stiffness were varied to study the wall deflection behaviour. Based on these results, a multivariate adaptive regression splines model was developed for estimating the maximum wall deflection. Parametric analyses were also performed to investigate the influence of the various design variables on wall deflections.
Keywords
wall deflection; braced excavation; multivariate adaptive regression splines; case histories; parametric analysis; finite element analysis;
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