摘要
由于大跨径上承式拱桥在拱座处将产生巨大的水平推力,导致地基变形,而溶崩角砾岩岩质较软,对工程的稳定性有重要影响。以大宁河特大桥桥址处溶崩角砾岩为研究对象,通过系统的试验与理论研究,得到溶崩角砾岩抗压特性并提出溶崩角砾岩的流变力学模型,并将建立的流变力学模型所得的研究成果与试验成果进行对比分析,最后通过数值仿真对流变力学模型进行验证。本文研究成果为对我国建设中最长的上承式钢管拱桥———巫山大宁河大桥的长期稳定性分析及相关工程建设提供依据。
Because of the big horizontal pushing force in the skewback caused by the big span arched bridge,the foundation is deformed,but the solution-collapse breccias is soft,it has significant effect on the stability of the project.By taking the rock of collapsed breccias from Daning bridge,based on laboratory tests and theoretical analysis,the strength and rheologic mechanics model for solution-collapse breccias is suggested.The comparison of laboratory creep tests and numerical results are given.A simulation analysis employed to prove the model has been established.The achievements obtained from the research work will benefit the designer of the longest steel tube arch bridge and other similar projects.
出处
《地下空间与工程学报》
CSCD
北大核心
2010年第4期729-734,共6页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金项目(40772184)
关键词
溶崩角砾岩
力学特性
流变力学模型
数值仿真
solution-collapse breccias
mechanical characteristics
rheologic mechanics model
numerical simulation.
