摘要
为了分析砂卵石地层物理参数对盾构管片内力的影响,以呼和浩特地铁典型地层为例,设计7种工况,通过"荷载-结构"模拟计算,对比分析6个地层物理参数对管片内力的影响,进而得出单因素敏感性结论;再以此为基础,采用正交试验原理和极差分析方法,充分考虑各地层物理参数相互作用,研究分析多因素敏感性。结果表明:黏聚力和垂直基床系数对管片内力几乎无影响;影响管片内力的地层物理参数多因素敏感性等级由高到低分别为水平基床系数、静止侧压力系数、内摩擦角、重度;为进一步深入研究水土与管片的关系奠定了基础,对类似工程分析提供借鉴。
Taking typical strata of Hohhot Metro as an example,in order to analyze the influence of physical parameters of sandy pebble stratum on the internal force of shield segmentthis paper first designs seven working conditions,compares and analyses the influence of six stratum physical parameters on internal force of segment through"load-structure"simulation calculation,and then draws a conclusion of single factor sensitivity.Based on that,the orthogonal experimental principle and range analysis method are adopted to study the sensitivity of multi-factors with full consideration the interaction of physical parameters of different strata.The results show that:1)cohesion and vertical bedding coefficient have almost no effect on segment internal force;2)the sensitivity grades of multi-factors affecting segment internal force are horizontal bedding coefficient,static lateral pressure coefficient,internal friction angle and severity from high to low;3)it lays a foundation for further study on the relationship between water and soil and segments and provides reference for similar projects.
作者
曹伟
王俊
李慧
CAO Wei;WANG Jun;LI Hui(China Railway First Survey and Design Institute Group Ltd.Xi’an shaanxi 710043,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2019年第S01期125-129,共5页
Journal of Safety Science and Technology
关键词
盾构管片
砂卵石
敏感性
正交试验
水平基床系数
静止侧压力系数
shield segment
sand pebble
sensitivity
orthogonal test
horizontal bed coefficient
static lateral pressure coefficient
作者简介
曹伟,本科,高级工程师,主要研究方向为地下结构工程的设计及科研。
