Study On Influence Of On Deformation And Internal Force Of Foundation Pit Structure By Building Load

With the rapid development of China's national economy,land resources,the contradiction is also increasingly prominent,in order to be able to make more efficient use of land,the development and utilization of underground space is particularly important.In the construction process,The corresponding number of deep foundation pit engineering also increases,and often in a dense building area,it will inevitably be deep foundation pit construction and the impact of the surrounding buildings.For such pit engineering,the past pit engineering design theory and construction technology has been difficult to meet the safety requirements of the surrounding environment,there is an urgent need for some scholars and engineering and technical personnel to study the adjacent buildings on the foundation pit support force and deformation of the impact,so deep foundation pit design and construction technology once again become a hot issue.In view of the conditions of this foundation pit engineering,this article is the starting point,completed the following.Based on the geomorphic features of the impact area in the southern plains of Hebei Province,through the acquisition of geological survey parameters,the following aspects of the study:(1)The construction of the pit excavation process,the need to pay attention to the problem and to ensure that the surrounding security needs to take a detailed description of the measures;(2)In the second chapter,the author summarizes the three factors that affect the deformation of the foundation pit and the advantages and disadvantages of the several commonly used supporting structures and their application scope.After comparison,the joint support type is adopted;(3)The ABAQUS finite element software was used to simulate the influence of the distance between the adjacent building and the foundation pit on the foundation retaining structure and the building itself,with the increase of the distance between the building and the foundation pit,the settlement of the building is getting smaller and smaller,after more than 10m,the foundation pit has little effect on the settlement of the building;(4)The ABAQUS finite element software is used to simulate the influence of the size of the building load on the foundation supporting structure and the building itself.The maximum displacement of the anchor cable will change with the distance between the boundary of the building and the foundation pit.When the building is 6m from the foundation pit,the maximum displacement is at the center of the upper anchor,and as the distance increases to 12m,the maximum displacement is transferred to the end of the anchor.