Based on the construction practice of the non-navigable bridge at the junction of the island and bridge on the west artificial island of the Shenzhen-Zhongshan Link,this paper introduces the technical key points of the construction process of the deep-water composite steel sheet pile cofferdam in combination with the characteristics of the project and the construction area,especially the conditions of the compacted sand pile composite foundation,and conducts targeted research on the key processes.At the same time,according to the real-time monitoring of the cofferdam,the causes of structural stress and deformation were analyzed to ensure the safety and stability of the cofferdam from plugging,pumping to using.The implementation of the construction technology has verified the feasibility of the deep-water composite steel sheet pile technology,and has certain popularization value.
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