邻近建筑荷载对地下管线的影响分析

为研究邻近建筑荷载对地下给排水管线的影响 ,应用弹性半空间受分布荷载作用的解答 ,得到了邻近建筑附加荷载在管线上的附加应力分布情况 ,并采用曲线拟合方法对附加应力分布进行了拟合分析 .应用文克勒弹性地基短梁理论 ,推导出附加应力作用下管线的变形、剪力和弯矩计算方法 .结合管道接头处的力学特性 ,提出了管道错位、开裂等地下管道病害的定量化评判方法 ,为进一步评价地下管线在正常使用状态下的安全性提供了依据 .结合工程实例进行的对比分析表明理论计算结果与实际情况比较吻合 .

Influence of Additional Load Caused by Adjacent Buildings on Underground Pipeline

Based on the theory of elastic half-space subjected to the distributed load,the influence of additional load caused by adjacent buildings on underground pipeline was analyzed,and the additional stress distributed on the pipeline due to the adjacent building was obtained. Further,the curve-fitting method was used to study the distribution of additional stress. According to the short beam theory of Winkler elastic foundation,the deformation,shearing force,bending moment of the pipeline were deduced. Considering the mechanical characteristic of joints,a quantitative approach was put forward to evaluate the defects of the underground pipeline such as displacement and crack of the pipeline. It could be used to analyze the safety and reliability in regular service stage of the pipeline. Finally,present method was also verified with practical engineering.