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基坑开挖改变了原有土体的应力平衡,使得相邻支护结构和土体侧移,必然导致地下管线向基坑内方向发生变形。文章基于某深基坑工程,采用数值模拟研究了基坑开挖、加载支护过程中边坡的应力、应变以及对黑河管线的影响程度等,通过对深基坑水平位移值、黑河管道总变形控制值的论证,提出了其相应的安全预警值,为基坑安全应急预案的制定提供了依据。
Excavation of foundation pit has changed the stress balance of the original soil so that the adjacent supporting structures and the lateral displacement of the soil will inevitably cause the deformation of the underground pipeline in the direction of the foundation pit. Based on a deep foundation pit project, numerical simulation has been carried out to study the stress and strain of the slope during excavation and loading and support and the degree of influence on the Heihe pipeline. Based on the analysis of the horizontal displacement of deep foundation pit, Deformation control value of the argument, put forward its corresponding safety early warning value for the foundation pit safety emergency plan to provide a basis.