摘要
湖南省西洞庭湖平原地段沿线地质条件差且软基处理方式繁多,为研究此地区路涵过渡段软土路基沉降特性及水泥搅拌桩渐变桩长对行车平顺性的影响,本文依托安慈高速公路项目,以桩长为变量进行有限元数值模拟分析,既考虑邻近区域软土地基处治效果,又要实现涵顶路基至一般路基的平缓过渡,以行车平顺性和运营期内涵洞拉压应力变化指标遴选水泥搅拌桩渐变桩长参数,并基于工程地基处治方案针对性提出复合地基渐变布桩方案,以期为高速公路路涵过渡段软土地基处治提供理论支撑。
The geological conditions along the Dongting Lake Plain in Hunan Province are poor and there are many ways of soft foundation treatment. In order to study the settlement characteristics of soft soil roadbed and the influence of the gradient pile length of cement mixing pile on the traffic comfort in this area, this paper relies on the Anci expressway project and conducts finite element numerical simulation analysis with the pile length as the variable, which not only considers the treatment effect of soft soil foundation in the adjacent area, but also realizes the gentle transition from culvert top roadbed to general roadbed, the gradient pile length parameters of cement mixing pile are selected based on the driving comfort and the change of tensile and compressive stress of culvert during the operation period. In addition, a composite foundation graded pile scheme is put forward based on the engineering foundation treatment plan, with a view to providing theoretical support for the soft soil foundation treatment in the transition section of expressway culvert.
作者
黄秦
HUANG Qin(China Railway 21^(st)Bureau Group 6^(th)Engineering Co.Ltd.,Beijing 101111,China)
出处
《铁道建筑技术》
2023年第2期90-93,160,共5页
Railway Construction Technology
基金
中铁二十一局集团有限公司科研开发项目(19C-5)。
关键词
软土路基
修正剑桥模型
水泥搅拌桩
渐变桩长
行车平顺性
soft soil roadbed
modified Cambridge model
cement mixing pile
gradient pile length
traffic comfort
