| Due to the rapid development of the cities builds,it is inevitable that deformation of adjacent buildings and their foundations because of the foundation pit excavation of new road engineering,and then affecting their safety and reliability.For this reason,the influence of the whole process of layered excavation of the adjacently foundation pit on the settlement and deformation of the Ashes tower supporting system is studied in this paper.Based on the auxiliary road foundation pit of the northern section of Shanghang Road,Houweizhai Project,Xi'an Fuxin District,this study designs and calculates the soldier pile system by the software of Lizheng Deep foundation pit.In addition,a 3D solid model is established by ABAQUS,which simulates the whole process of foundation pit excavation.Then compare and analyze the results of the two methods that from the monitoring of the actual construction process and numerical analysis.The main achievements are as follows.(1)Leading software has ample advantages,including convenient calculation,easy operation and time saving of pretreatment.While,there are also same deficiency in theoretical foundation and certain limitations in the design calculation process.The parameters of retaining pile in length,diameter,spacing and stiffness cannot accurately simulate the actual situation.Besides,there are also restrictions on the arrangement of the retaining piles.(2)It is a better choice to utilize the ABAQUS software to simulate the influence of foundation excavation with super close distance on deformation in the surrounding environment.Meanwhile,the model analytical results indicated that supporting scheme and construction technology for this project can effectively control the influence of foundation excavation with super close distance on deformation in the surrounding environment.(3)The moment curve of anti-slide pile shaft is small at the end of the pile and large in the middle.Meanwhile,it also decreases with the increase of excavation depth of foundation pit,while the overall moment will continue to increase with the increase of excavation depth of foundation pit.(4)The maximum horizontal displacement of the retaining wall and the retaining soil is 12.1mm,and the maximum sedimentation value is 5.0mm satisfied with the codes.(5)During and after the excavation of the road foundation pit,the sedimentation value of ground beam in ashes tower is about 1mm,which is far less than the maximum allowable value of 10 mm.This indicated that foundation pit excavation has no effect on the safety and durability of the ashes tower. |
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