Study on the H3 Soft Solidifying Agent for Strengthening Foundation Pit of Abutment Xiong Jiaguo Shen Weiguo Zhou Mingkai Feng HuajieThe composite foundation,which could be made using the H3 soft soil solidifying agent and welltype pile method,could strengthen the soft soil of foundation pit of abutment.Experiments in laboraty and application in the actual engineering state that every age strength of solidifyed soil using H3 soft soil solidifying agent is higher than that of soil mixed with cement.It must have more economic benefit spreading and using the H3 soft soil solidifying agent.: H3 soft soil solidifying agent; foundation pit of abutment; composite foundationXiong Jiaguo: Engineer,Dept.of Science Research,WUT,Wuhan 430070,China.