Discussion on Risk Assessment of Geotechnical Engineering of a Railway Transportation in Soft Soil Areas
The site along Shanghai Rail way Transit Line 15 is divided into 6 engineering geological zones in this paper.Based on analytic hierarchy process method and risk matrix method,a rail transit geotechnical engineering risk assessment system in soft soil areas is established,and the geotechnical en-gineering risk degree of the site along Rail Transit Line 15 is assessed by semi-quantitative and semi-qual-itative.The assessment conclusions are:the geotechnical risk of foundation pit enclosure construction in shallow areas comprised by silty soil and sandy soil is larger;the geotechnical risks of drainage and foun-dation pit excavation in each geological zone are greater;the geotechnical risks of shield tunnel construc-tion and engineering piles(bored piles)construction in areas with silty soil and sandy soil distribution are larger.
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