Open AccessMonitoring analysis of a deep foundation pit construction adjacent to old buildings
Author(s) -
Wenzhao Chen,
Xiaojie Wei,
Jiaqing Fan,
Kai Yang,
Yao Xiang-rong
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/780/5/052015
Subject(s) - excavation , foundation (evidence) , consolidation (business) , impervious surface , geotechnical engineering , deformation (meteorology) , dewatering , geology , settlement (finance) , engineering , mining engineering , archaeology , geography , ecology , oceanography , accounting , world wide web , computer science , business , payment , biology
The deformation and surface settlement need more attentions when a foundation pit is adjacent to old buildings. The foundation pit of Liangyuan Garden museum project was used as the background, and author analyzed the monitoring data which gathered from beginning to end. The results show that the lateral deformation of foundation pit mainly occurs in the excavation stage, and the influence of surrounding buildings on deformation needs to be considered. The retaining structure with inner support system shows a good deformation coordination ability and obvious spatial deformation characteristics. Entering the impervious layer makes the dewatering curtain effectively block the connection between inside and outside water system. This measure reduces the excavation impact on the groundwater level outside the pit and prevents excessive consolidation settlement in the surrounding soil layer.