Numerical Tests on the Mechanical Behavior of Dike under Earthquake Loading and Corresponding Seismic Enhancement Effect with Ground Improvement Method

Linlin Gu, Zhen Wang, Xianzhang Ling, Feng Zhang

Abstract


Earthquake-induced liquefaction is a major concern for construction safety, and a large number of infrastructures can’t meet the requirement of the new seismic design code after 2011 Eastern-Japan earthquake, some countermeasures are necessary to be taken. This paper presents a numerical study on seismic performance of liquefaction mitigation for constructions in liquefiable foundation soils during the earthquake. The infiltration grouting method in the sandy layer was proposed to examine the efficiency of the ground treatment strategies for the soil dike. Special emphasis is given to the computed results of EPWP (excess pore water pressure) and displacements during the seismic excitation. Generally, the effectiveness of the approaches in mitigating liquefaction-induced soil deformations is clearly demonstrated by the analytical methods. Infiltration grouting method is demonstrated as a useful strategy for the dike design when subjected to earthquake loading.

Keywords


earthquake; liquefaction; infiltration grouting; displacement; EPWP


DOI
10.12783/dtmse/ictim2017/10105

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