Analysis of a multi propped deep excavation

![CDATA[This paper presents a case study of a deep excavation carried out for Hong-His Garden Field Building in Taipei. The excavation was made through layered stiff clay and supported by soldier piles and timber lagging. The retaining wall system of the 26 m deep excavation was supported by a prop system, which spans over four levels. Finite element modelling is used to simulate the staged construction sequence, which involves excavation and installation of the prop system. Constitutive behaviour of the soil is modelled using the Modified Cam Clay model and the excavation in analysed assuming plane strain conditions. The finite element model used for this analysis is based on the coupled theory of nonlinear porous media and the finite element analysis is carried out using ABAQUS/Standard. The lateral wall deflection, load carried by the props and the settlement adjacent to the excavation obtained from the finite element analysis are compared with filed data. Two different modelling techniques that can be adopted to simulate strut systems used to support excavations are investgated.]]