Displacement Properity Study During Dalianzhonghanginternational Square Deep Pit Excavation With Pile And Cable

With the construction of development of the large-scale municipal installation and public infrastructure, more and more deep pit engineering has appeared. Complex surrounding environment and underground buildings have made deep pit engineering condition worse and more difficult. The pit supporting system deformation requirements are strict.Pit supporting system’s displacement calculation and deformation’s control should be adapt to supporting and surrounding environment displacement requirement.DalianZhonghang international square deep pit to be built is located at the corner of Road Baishan and zhongshan, where surrounding buildings and pipe densely covered, the large depth of Pit is 13.83m. Pit’s excavation and support’s construction should be influenced on surrounding buildings’and environments’ settlement. To keep pit’s excavation and supporting’s construction safe, the following job to be studied in the thesis:(1)Soil press analysis, design method and its step is discussed with the limit state design method. The support parameters are designed, calculated with the help of Lizheng deep Pit software.(2)the numerical simulation with MIDAS/SOILWORKS of Dalian Zhonghang international square deep pit’s excavation shows that surface settlement, horizontal and vertical displacement regularity。(3) study and application of the site monitoring measurement during Dalian Zhonghang international square deep pit’s excavation had completed, the site monitoring measurement results had been analyzed and summarized.(4) The relationship of surface settlement has been fitted on the basis of mathematical statistics theory with MatLab software, and this is helpful to the some guiding role for deep pit’s excavation and the support of pile and cable in the city.