沿海地区淤积质软土层地基处理技术措施研究

摘要

Combined with the construction of Lianyungang⁃Yancheng Railway, this paper, based on the technology experi⁃ments and analysis on design patterns of bi⁃directional cement mixing pile, T⁃shaped pile, high pressure jet⁃grouted pile, CFG pile and pipe pile in the silty soft soil layer of the east coastal area, it summed up the feasibility and reliability of treat⁃ment measures for different types of piles such as bi⁃directional cement mixing pile, T⁃shaped pile and pipe pile. In addi⁃tion, it analyzed the failure causes of pile⁃forming for high pressure jet⁃grouted pile and CFG pile, and proposed the treat⁃ment measures of using bag⁃grouting pile to replace the high pressure jet⁃grouted pile.%结合连盐铁路建设，通过对东部沿海地区淤泥质软土地层中双向水泥搅拌桩、钉形桩、高压旋喷桩、CFG桩及管桩等软土地基处理设计型式进行工艺试验及分析，总结了双向水泥搅拌桩、钉形桩及管桩等桩型在该地区处理措施的可行性和可靠性，分析了高压旋喷桩和CFG桩不能成桩的原因，提出了布袋注浆桩来替代高压旋喷桩的处理措施。