Open AccessInfluence of Trough Excavation Study on Deformation of Deep Foundation Pit Support Structure in Water-rich Area
Author(s) -
Leiming Li,
Chunying Yang,
Xingming Guo,
Zaifeng Yao,
Liu Da
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/358/3/032023
Subject(s) - excavation , geotechnical engineering , trough (economics) , diaphragm (acoustics) , deformation (meteorology) , geology , foundation (evidence) , finite element method , lateral earth pressure , stratum , engineering , structural engineering , law , oceanography , political science , loudspeaker , electrical engineering , economics , macroeconomics
Based on finite element numerical calculation, calculation results of first support, trough excavation and over-excavation working conditions were compared in this paper. Analysis of deformation difference of retaining structure in water-rich and thick sand stratum was provided. Calculation results were compared with actual monitoring data, in order to explore the influence law of trough excavation on the horizontal deformation of retaining structure. The results show that the trough over-excavation soil exacerbates the lateral deformation of underground diaphragm wall, the cumulative maximum is 9.28mm and the process maximum is 10.45mm, 34.93% of the maximum underground diaphragm wall deformation. Conclusion of back pressure soil restrains the deformation of underground diaphragm wall can also be drawn, the process maximum is 6.44mm, 21.52% of the maximum underground diaphragm wall deformation. The design of the deep foundation pit retaining structure should be checked as far as possible according to the actual working conditions to reduce the engineering risk, ensuring that the design is economical, reliable and reasonable.