摘要
基坑开挖对临近地下管线的影响是城市基坑工程中经常遇到的一个实际问题,针对以往研究中没有考虑管道内压对管线位移的影响问题,在对管线承受内压时的应力场进行分析的基础上,采用数值计算方法讨论了5种不同内压条件下管线的水平及垂直位移,认为对于一般的城市地下管线,内压对位移的影响很小,可忽略不计。同时还讨论了基坑支护条件对管线位移的影响,并对基坑开挖中支护桩的受力进行了分析。研究结果可为类似工程提供参考。
Underground pipelines nearby affected by excavations are a practical problem often encountered in city excavation engineering.Due to the fact fact that the influence of pipeline inner pressure on its displacement was not considered in past study,the numerical calculation method is adopted to discuss the horizontal and vertical displacements of the pipeline under five kinds of inner pressures on basis of analyzing the pipeline stress field with inner pressure.The result shows that inner pressure has little influence on displacement and can be neglected to an average city underground pipeline.Meanwhile,influence of excavation support condition on pipeline displacement is discussed,and the force of the support pile during the excavation is analyzed.The study results can be referred by similar engineering.
出处
《工业建筑》
CSCD
北大核心
2010年第S1期686-689,共4页
Industrial Construction
基金
北京市教育委员会科技计划面上项目(km200910038002)
中国地质大学(北京)青年教师基金资助项目
关键词
基坑工程
开挖
管线内压
支护桩
excavation engineering
excavate
pipeline inner pressure
support pile
