Study on the Design and Construction Technology of the Excavation and Support Structure of Deep Foundation Pit in Loess Formation
Due to the unique physical and structural properties of loess strata,the support structure is often difficult to maintain the stability of deep foundation pit excavation.Therefore,the design and construction technology of deep foundation pit excavation in loess strata are proposed.The excavation support structure of deep foundation pit in the form of continuous wall and recheck soil nail is designed,and the specific parameters of each structure are standardized by the stability safety factor of the whole supporting structure.In the construction stage,the design is carried out for the construction and continuous wall.In the practical application,test the horizontal displacement and vertical settlement stabilized in 80 days after construction,the corresponding maximum horizontal displacement and 24.06 mm and 18.07 mm respectively within 120 days,in the soil pressure strength distribution is always stable within 11.0 kPa,there is no obvious stress growth.
loess formationdeep foundation pitexcavation and support structureconstruction technologycontinuous wallcheck soil nailstability and safety factorstandardization
万方数据
维普
