DESIGN AND MONITORING OF STEEL SHEET PILE COFFERDAMS OF LIEDE BRIDGE IN GUANGZHOU
PAN Hong1，CAO Hong1，YIN Yiming2
(1. State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou，Guangdong 510640，China；2. AVIC Institute of Geotechnical Engineering，Beijing 100098，China)
Abstract：The cofferdams of Liede bridge pier are retained by steel sheet pile and steel struts structure. Steel pipe piles are used to support the bottom of steel sheet pile to avoid excessive bottom displacement and cofferdams unstability due to less embedment length of steel sheet pile cofferdams. The method to ensure safety of cofferdams not only assists the achieving of the project successfully，but also offers the experience for the application of steel sheet pile on the similar geologic conditions. To find out excessive displacement of bottom of cofferdams，relative displacement of steel sheet piles locating two ends of steel struts is monitored. Technique of design and monitoring is effective.
