市政道路工程软土地基处理技术分析

Analysis on Soft Soil Foundation Treatment Technology of Municipal Road Engineering

软土地基具有含水量高、抗剪强度低、压缩性大等特点,如果地基处理方案设计不合理,可能会导致设计返工、工期推迟、人员伤亡等问题。鉴于此,论文以安徽某城市快速路桩号ZK6+378典型断面软土地基为研究对象,分析了城市道路软土地基沉降变形规律及处治措施,针对CFG桩复合地基设计关键点进行了探讨,利用有限元软件PLAXI8.0建立二维计算模型,分析了软土地基处理前后的空隙水压力及沉降变形规律,以期为类似市政道路软土地基处理提供科学指导。

Soft soil foundation has the characteristics of high moisture content,low shear strength and high compressibility.If the design of foundation treatment scheme is unreasonable,it may lead to design rework,construction period delay,casualties and other issues.In view of this,the paper takes a pile No.ZK6+378 typical section of the soft soil foundation of a city expressway in Anhui Province as the research object,analyzes the settlement and deformation law and treatment measures of the soft soil foundation of the city road,and discusses the key points of the design of the CFG pile composite foundation.A two-dimensional calculation model is established by using the finite element software PLAXI8.0 to analyze the pore water pressure and settlement deformation law before and after the soft soil foundation treatment,so as to provide scientific guidance for the soft soil foundation treatment of similar municipal roads.