各向异性岩体中埋藏式管道衬砌结构分析

Analysis on steel-plate-lined reinforced-concrete pipe buried in stratified anisotropic surrounding rock

采用三维非线性有限元对层状各向异性岩体中钢衬钢筋混凝土管道洞室开挖、充水运行和衬砌结构开裂等工况进行了分析计算。根据钢衬钢筋混凝土衬砌与围岩联合受力的特点,提出了层状各向异性岩体中钢衬钢筋混凝土管道结构分析的计算方法。通过对多种方案计算和比较,论证了层状各向异性岩体中钢衬钢筋混凝土管道衬砌结构受力的基本特点,为层状各向异性岩体中钢衬钢筋混凝土管道衬砌的配筋和衬砌厚度的确定,提供了可靠的设计依据。

The stability of surrounding rock, the working characteristics of steel and/or concrete linings in pro-cess of excavation,operation, and cracking conditions for a steel-plate-lined reinforced-concrete pipe in stratifiedanisotropic surrouriding rock were analyzed by three-dimensional nonlienear FEM. According to the features of u-nited load-bearing among steel lining, reinforced-concrete pipe and stratified anisotropic surrounding rock, athree-dimensional numerical computational method for this composed structure was presented. Through compara-tive computation to various schemes, some basic regularities of load-bearing in this structure were demonstrated.home reliable reference data are provided fOr the design to determine the thickness of steel lining and the arrange-ment of reinforcement in the concrete pipe buried in this type rockmass.