Fengwen Lai, Ningning Zhang, Songyu Liu, Dayu Yang
Active earth pressure on retaining structures supporting a narrow column of soil cannot be properly analysed using Coulomb's theory. Finite-element limit analysis (FELA) shows that the soil forms multiple failure surfaces if the soil column is sufficiently narrow. This paper proposes a framework for...
Fengwen Lai, Franz Tschuchnigg, Helmut Schweiger, Songyu Liu et al.
Accurate determination of parameters for an advanced soil constitutive model highly relies on laboratory testing, even though it is notoriously difficult to obtain undisturbed samples for soft soils. This study explores the potential use of in situ tests, such as piezocone penetration tests (CPTU) a...
Songyu Liu, Taishan Lu, Guojun Cai, Kai Wu et al.
This paper presents a comprehensive case study of the construction of a 10 km long large-span underwater tunnel under Taihu Lake using the cut-and-cover method. The main challenges for the design and construction of the tunnel are limiting soil deformation and tunnel settlement, controlling the grou...
Yin Wai Siu, Benny S L Lai, Fengwen Wang, Zhi Hua Zhou et al.
A robust computer procedure for weight minimisation of a high–rise and portal frames under the deflection constraint at various locations is presented. It replaces the conventional tedious and unreliable manual assessment for minimum weight design. Several practical considerations such as the Invari...