长江中下游特大桥工程地质勘察与研究

Engineering Geological Investigation and study of Big Graffic Bridges Across the Middle and Lower Reaches of the Changjiang River

在长江中下游跨江特大桥建设中遇到了地震与断裂构造、软弱层带、极软岩、岩溶等复杂的工程地质问题。在解决这些问题中除了采用常规的工程地质勘察和试验技术外 ,还进行了软岩流变试验、钻孔内彩色电视录相、原位承载力及压桩试验、桥基地质力学模型试验等技术和方法 ,取得了可靠的数据 ,为大桥设计提供了依据 ,也为长江中下游特大桥建设提供了经验。

In the construction of big graffic bridges across the middle and lower reaches of the Changjiang River,complicated engineering geological problems have occurred,such as fault,soft interlayer,extremesoft rock,karst cave and so on.In addition to common methods of investigation and mechanic test,rheology test of soft rocks,colour video recording,field bearing test,pier analogue simulating have been adopted to treat the problems.The practice has provided reliable data for bridge design,which have been tested by successful construction of bridges,and will be valuable experience for the future bridge construction in the middle and lower reaches of the Changjiang River.