Abstract
Lattice-shaped diaphragm wall (hereafter referring to LSDW) is a new type of bridge foundation, and the relevant investigation on its horizontal behaviors is scant. This paper is devoted to the numerical study of the comparison on the static and seismic responses of LSDW and pile group under similar material quantity in soft soil. It can be found that the horizontal bearing capacity of LSDW is considerably larger than that of pile group, and the deformation pattern of LSDW basically appears to be an overall toppling while pile group clearly shows a local bending deformation pattern during the static loading process. The acceleration response and the acceleration amplification effects of LSDW are slightly greater than that of pile group due to the existing of soil core and the difference on the ability of energy dissipation. The horizontal displacement response of pile group is close to that of LSDW at first and becomes stronger than that of LSDW due to the generation of plastic soil deformation near the pile-soil interface at last. The pile body may be broken in larger potential than LSDW especially when its horizontal displacement is notable. Compared with pile group, LSDW can be a good option for being served as a lateral bearing or an earthquake-proof foundation in soft soil.
Highlights
The diaphragm wall industry started in Italy in the 1940s and spread throughout the world in many decades [1]
Lattice-shaped diaphragm wall, shown in Figure 1, is a new type of bridge foundation composed of a cap and diaphragm walls [3]
Wu et al [2] performed a study by comparing the vertical behavior of lattice-shaped diaphragm wall and pile group under similar material quantity in soft soil
Summary
The diaphragm wall industry started in Italy in the 1940s and spread throughout the world in many decades [1]. With the properties of high construction efficiency, low cost, small noise, and great rigidity, LSDW is especially suitable for being used as the large-span bridge foundations. It is worthwhile to note that both of the construction processes of the preceding wall element and the following wall element consist of four steps. Among these steps, Steps 1 and 2 are mainly completed by an excavator. The preceding and the following wall elements are connected by preset joints to form an integrated wall segment, and an LSDW can be constructed by combining multiwall segments arranged in different directions. More details about the construction procedures and joints arrangement of LSDWs with different
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
