The Study On Seepage Field Evolution Characteristics And Supporting Technology Of Large And Deep Foundation Pitunder The Action Of Tidal Dynamic

In our country, The lifeblood of the industry economy and the majority of the population distribution in coastal areas. The ebb and flow of the water in coastal area will cause changes in coastal zone of the underground water level, so only combining the hydrogeological conditions of the region and identifying coastal aquifer groundwater level with the tides of regular wave phenomenon, mastering the evolution characteristics of seepage field in coastal area, to guarantee the quality of the waterfront construction. It is great significance for reduce the economic loss and promote the stable development of the coastal economy. This article is based on deep foundation pit engineering of the Shan Dong (Qing Dao) international shipping center A1 plots. The data of the Underground water level, the level and settlement displacement of pile top, level displacement of piles were studied to analyze disturbance phenomena of the low frequency changes of coastal tidal disturbance on the seepage field, and the coastal foundation pit seepage space-time evolution model was established. The influence law of seepage field on foundation pit supporting structure under the tide dynamic force is revealed. This text launched the research at following works.(1)Both sides of the seepage field reality measurable head data changes over time are taken as a boundary condition, and the physical model is simplified, to establish the seepage equation of seepage field in coastal area. A numerical simulation using MATLAB numerical software is concluded that time space change characteristics of the seepage field. And then the coastal tidal power evolution characteristics of deep foundation pit under the action of seepage field are revealed.(2)The seepage space-time evolution characteristics model is used, and corresponding seepage field data is import FLAC3D. A variety of foundation pit supporting model is established for mechanics analysis, for longitudinal analyzing the influence laws of seepage field on foundation pit supporting structure under different conditions in the process of excavation, and transverse getting better foundation pit supporting.(3)"Pile + anchor + steel pipe pile "supporting system were used based on deep foundation pit engineering of the Shan Dong (Qing Dao) international shipping center A1 plots. Combining The data of the Underground water level, the level and settlement displacement of pile top, level displacement of piles were studied, to evaluate the supporting effect of the project. The results show that the support system is good at controlling deformation, and it is a good reference for similar engineering.