Open Access3D Numerical Simulation of the Influence of Drilling-blasting Subway Construction on Subgrade Settlement
Author(s) -
Yanjiang Yu,
Jiliang Wang,
Tingting Du,
Ying Liu
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/780/6/062020
Subject(s) - subgrade , settlement (finance) , geotechnical engineering , excavation , rock blasting , drilling , engineering , computer simulation , geology , simulation , computer science , mechanical engineering , world wide web , payment
Based on the tunnel between Junfeng road-Xiliuzhuang of Qingdao metro, the tunnel excavation model is established by FLAC3D software. The established calculation model mainly includes:(1) Free field boundary conditions are adopted around and at the bottom of the model;(2) The blasting load is simulated by triangle pulse wave;(3) According to the peak value V of the surface velocity, the peak value P max of the velocity in the triangular pulse wave is calculated by Sadovsky formula;(4) The calculation results show that the vertical settlement of subgrade is more significant when compared with horizontal settlement;(5) the calculation results are in good agreement with the field monitoring data. It shows that the method can simulate the dynamic characteristics of the model and reflect the dynamic response of subgrade settlement.