南水北调东线徐州段泵站膨胀土地基工程性质研究

南水北调东线在徐州段共有刘山、解台、蔺家坝、睢宁、邳州五座泵站,其中刘山、解台、睢宁、邳州四座为膨胀土地基.膨胀土均为上更新统含砂礓黏土,膨胀性一般为弱-中等,局部较强,有膨胀性不均匀但膨胀速度比较快的特点,增加了泵站地基设计和基坑开挖的特殊性和复杂性.通过对各站膨胀土地基工程性质的研究,结合站址其它岩土工程条件综合分析,为其地基设计和基坑开挖提出合理建议.

Expansion Foundation of the Pumping Station at Xuzhou Section in the South-to-North Water Project

There are five pumping stations named Liushan , Jietai, Linjiaba , Suining and Pizhou in Xuzhou section of the South-to-North Water Transfers Eastern Line, in which Liushan , Jietai,Suining , Pizhou are expansion foundation. Expansive soil is upper pleistocene series clay with expansibility from weak to medium, some parts being strong with irregular expansibility but high-speed characteristic, resulting in increasing the complexity of foundation design and the base hollow. The research makes reasonable suggestion and analysis for the foundation design and base hollow to dig.