基于极限状态设计法的铁路工程地基处理设计体系构建

Design System Construction of Railway Ground Treatment Based on Limit State Design Method

为适应世界标准构造物设计规范的发展趋势,基于极限状态设计法的基本思想,构建了完整的铁路工程地基处理设计体系,包括地基处理工程等级、荷载组合、地基处理性能要求等;提出了铁路地基处理设计性能矩阵、地基处理与性能要求之间的相互关系;针对不同铁路等级、轨道类型、速度目标值给出了铁路地基处理设计中稳定性和沉降的控制指标。将极限状态设计理念引入到地基处理设计中,其目的就是为了逐步融入国际发展新潮流,以期制定满足不同工程性能要求的地基处理技术规程。

In order to meet the development of the world standard structure design specification,this paper presents a design system on the basis of limit state design method,aiming at constructing the design system of railway ground treatment in China.This system includes ground treatment engineering grade,load combination,performance requirements etc.Performance matrix of the limit state design and the relationship between ground treatment and performance requirements are put forward for railway ground treatment.The control indices for stability and settlement of railway subgrade are presented,respectively according to railway grade,track type and velocity value.The limit state design is introduced to deal with design of ground treatment for the purpose of the gradual integration into the world design trend,and the satisfaction of the performance requirements for various projects used to develop suitable technical specifications.