Deformation and Failure Mechanism of Excavation in Clay Subjected to Hydraulic Uplift by Yi Hong & Lizhong Wang

Author:Yi Hong & Lizhong Wang
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

Yi Hong1 and Lizhong Wang1

(1)College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, Zhejiang, China

Yi Hong (Corresponding author)

Email: [email protected]

Lizhong Wang

Email: [email protected]

5.1 Introduction

As summerised in Chap. 2, accidents and catastrophic basal failure associated with hydraulic uplift are reported worldwide from time to time (Milligan and Lo 1970; Ramaswamy 1979; Clough and Reed 1984; Davies 1984; Qu et al. 2002; Gue and Tan 2004). Concern on potential base instability due to hydraulic uplift is also raised in the case history reported in Chap. 3. In spite of the frequently encountered base instability due to hydraulic uplift, this subject has not been studied systematically and well understood. To assist with systematic study of this subject, dimensional analysis is carried out in this chapter to propose key variables (expressed in dimensionless groups) to be considered in this study. Effects of the proposed dimensionless groups on basal response to hydraulic uplift are investigated by centrifuge tests and finite element analyses (results reported in Chaps. 8 and 9).

This chapter consists of three parts. First, variables which are potentially relevant to basal resistance against hydraulic uplift are listed, based on implications from a similar but relatively well studied subject (clay subjected to uplifting anchor). Finally, a back of envelope calculation is conducted to reveal mechanisms involved and to indentify key dimensionless groups related to this subjected.

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