Open AccessPerformance of buildings around a long irregular excavation by top-down technique in downtown Nanjing
Author(s) -
Zhiqiang Gu,
H. Li,
Meng Zhang,
Hao Lü,
Ying Sun
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/829/1/012028
Subject(s) - excavation , settlement (finance) , foundation (evidence) , downtown , geotechnical engineering , geology , deformation (meteorology) , engineering , archaeology , geography , oceanography , world wide web , computer science , payment
A 1257 m-long irregular deep excavation was located in the city center of Nanjing, China. The full-width and half-width top-down construction method was adopted. The deformation characteristics of the settlement of adjacent buildings based on field data is discussed, and the interrelationships between building settlement and excavation process, structural system and geological conditions are also considered. The analysis results show that building settlement is related to the excavation deformation, construction sequence, structure forms, foundation types and the distance to the foundation pit. Corner effect has played an important role in building settlement and will affect the settlement pattern eventually. The settlement surface of building outside the pit corner is three-dimensional, while the building located in the middle of the long side of the pit has a two-dimensional settlement surface.