振冲碎石桩处理软土地基后的复合承载力

盘锦市防洪大堤在城市区段内,采用钢筋混凝土及多功能型钢筋混凝土坝形修建,因基础软弱采用振冲碎石桩加固。为了解加固后地基承载力的变化情况,对振冲碎石桩加固区域内有代表性的振冲碎石桩桩体、桩间土、碎石基层等进行必要的物理力学检测和试验,根据试验数据按规定公式计算检测结果。对置换后形成的复合地基采用野外大型静活载试验检验,从总体看是可行的,随时间加长,振冲碎石桩处理后的复合地基承载力,完全能满足设计提出的要求。

Composite Bearing Capacity after Soft Soil Sungrade Treated by Vibrating-impact Spalling Pile

Panjin City Flood-control Embankment is placed in the section of the city area and constructed in the types of the steel reinforced concrete and multi-functional steel reinforced concrete dams.The subgrade because of its softness is reinforced by the vibrating-impact spalling piles.In order to deal with the variation of the bearing capacity of the reinforced subgrade,it is to carry out the necessary physical mechanics measuring and test of the vibrating-impact spalling pile body,pile-between soil and broken-stone base represented in the reinforcing area of vibrating-impact spalling piles.Based on test data and according to the regulated formula,the measuring results are calculated.The composite sungrade after replaced is inspected by the large-sized field dead-load and live-load tests.It is overall feasible.With the time lengthening,the bearing capacity of the composite subgrade treated by the vibrating-impact spalling pile can fully meet the requirements stipulated in the design.