| Deep foundation pit programme is a systematic and interdisciplinary project, which built on engineering, structural mechanics,soil mechanics.It currently affects the surrounding buildings and pipelines,etc.Therefore, certain measures must be taken to guarantee the smooth completion of the deep foundation pit.Thus,the design and preference of the supporting programme is the key.Considering the foundation strength,geotechnical structure,surrounding environment and other factors,select the optimal construction plan, guarantee safe and smooth completion of deep foundation pit construction, earthwork excavation and precipitation.The essay bases on one beijing deep pit foudation project. In the project, we Combine with theoretical study and field practical experience of deep foundation pit, analyze several common supporting patterns of deep foundation pit programme, as well as its applications,advantages and disadvantages of each,systematically analyze elements and factors affect the deep foundation pit programme.Targetting the safety,efficiency,convenience,the preferent supporting programme of Deep foundation pit should be selected maturely and systematically by analytic hierarchy process,comprehensive evaluation and the multi-objective decision-making methods.In this programme case,compared with soil nail wall,steel pipe pile,we choose the highest- scoring slope protection pile+ soil nail wall programme as the best preferent choice.After the programme is defined,we carry out the detailed designs and calculations,determine it as final deep foudation pit programme.At last,comparise the monitoring datas of displacement and the deep horizontal displacement of the supporting structure,its feasibility and practicablity is testified. |
