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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。
The influence of pit excavation on the adjacent underground pipeline is a practical problem often encountered in urban foundation pit engineering. In view of the fact that the influence of pipeline internal pressure on pipeline displacement has not been considered in previous studies, Based on the analysis, the horizontal and vertical displacements of the pipeline under five different internal pressure conditions are discussed by means of numerical calculation. It is considered that the internal pressure has little influence on the displacement for the general urban underground pipeline, and it is negligible. At the same time, the influence of foundation pit supporting conditions on pipeline displacement is also discussed. The force of supporting pile in excavation of foundation pit is also analyzed. The research results can provide reference for similar projects.