Practice and Discussion of Double-row Piles Retaining Structure for Deep Excavation in Xiong'an New Area
In order to study the bearing and deformation characteristics of double-row piles retaining structure under the typical stratum of Xiong'an New Area and guide the subsequent construction.A foundation pit project in the Xiong'an New Area,where double-row piles retaining structure was used for the first time,was taken as the research object,with vertical displacement of pile top,horizontal displacement of pile top and horizontal displacement of pile body as the main analysis items.The response characteristics of the double-row piles retaining structure method in the soil and water environment of the area were systematically studied by means of field monitoring and software calculation.The study shows that the vertical displacement of the top of the double-row pile is mainly elevated,and the elevation of the front-row pile is significantly larger than that of the back-row pile.The deformation of the front row piles is larger than that of the rear row piles,and the tie beam exists in two states of compression or tension.The horizontal displacement of pile tops in the excavation stage of the lower half of the foundation pit grows rapidly.The deformation patterns of the front and rear piles are significantly different by the tensile effect of the tie beam.The simplified model in the current calculation software is too simple,and both the calculated deformation values and deformation patterns are significantly different from the monitoring data.
万方数据
维普
