| Foundation pit engineering is a systematic project and it has a lot of influencing factors.At present,the deep foundation pit project is increasing every year,while it has more and more problems of support design and construction in the deep foundation pit engineering.it is necessary to ensure the stability of the foundation pit itself,but also need to ensure that adjacent buildings and underground pipelines and other municipal works safety.In the actual engineering practice,it needs to be further improved that the current deep foundation pit support design theory.It will increase investment and wasting because of too conservative consideration of security.It can reduce investment when reducing the stability of the foundation pit and deformation control standards,but it also most likely to cause a project accident.Therefore,the implementation of a support approach need to consider a number of factors.Taking the second phase of Yongsheng Garden in Wuhu City as an example,this paper compares several common methods of foundation pit support,included analysis of their own advantages and disadvantages,scope of application and applicable conditions,Finally,it chooses soil nailing support,which combined with the geological conditions of the site itself.This kind of support can bring the good economic efficiency.The Abaqus numerical analysis software was used to simulate the whole process of excavation and support of the foundation pit.The soil displacement and the internal force of the supporting structure were analyzed.The results of numerical analysis of Abaqus showed that the support design can meet the standard in the construction process of foundation pit.It proved the rationality,validity and economy of the selected support design.The Abaqus numerical analysis has a strong practical significance in the design of auxiliary deep foundation pit support,which has a good guiding effect for engineering design and construction. |
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