某电厂黄土桩基优化设计的试验改进

工程场地位于黄河中游的东岸Ⅲ级阶地前缘,上部地层为具湿陷性的黄土状土;下部为砂类土和碎石类土。一期工程在某些建筑地段采用人工挖孔扩底灌注桩,桩端持力层为⑤层细砂层。二期工程从桩径、扩大头的斜坡位置、桩端进入持力层深度等方面进行优化设计,既保证了技术方案的可靠性,又取得了显著的经济效益和社会效益。

The Optimization Design of Loess Pile Foundation in the Power Plant

The engineering place locates in the middle of the yellow river,it is belong in Ⅲ class bench in the east coast.Uupper part strata are collapsible loess,the lower part strata is sand soil and crushed stones.Adopted artificial to dig and expand bottom in-situ pile at the some building whileⅠperiod engineering,the pile point supporting layer is ⑤ layer fine sand.TheⅡperiod engineering have been optimized design from diameter of piles,length of piles,the slope position of extension head of piles and arrangement of piles,the piles have carried into supporting course(layer) depth etc.The optimized design promised the credibility of the technique project,Obtained to obvious of economic performance and social performance.