Research and propose suitable foundation solutions for some types of ground structures in Hai Duong city area

Abstract

According to the urban planning up to 2030, Hai Duong City is expanding
in both area and scale. In particular, the high-rise building density is
planned to increase. However, the soils at Hai Duong city are unfavorable
for high-rise building construction because the high-bearing capacity soils
are distributed at a great depth, with soft soils above. Therefore, the pile
foundation is a feasible solution for high buildings. With the pile
foundation, the selection of the load-bearing soil layer, the effective depth
of pile tip placement, pile diameter, the number of piles as well as the
estimated pile-bearing capacity in accordance with the ground structure
are of decisive importance to the effectiveness of the solution. The article
uses the Pile and Pile Group modules in the Geo5 Software Suite combined
with experimental research results to determine the load-bearing
capacity of piles according to different options in three types of ground
structures in Hai Duong City area. On that basis, evaluate the
reasonableness of pile foundation options for buildings of different sizes
based on technical and economic factors (number of piles, settlement, and
stability). The results indicated that the effective depths of pile tip are
varied from 33 m to 35 m for ground structure types I and II, and are
greater than 40 m for ground structure type III. Reasonable pile
foundation solutions for each group of buildings and ground structure
type are also proposed.