Discussion on revision of partial factors for gate chamber stability against floating at ultimate limit states
Shijian Liu · Northwest Hydropower · 2010
For water gates widely applied in water and hydropower projects,great attention should be paid to their structure safety.Now the single safety coefficient method cannot really reflect the safety level of the structure,and the partial factor limit states method should be used.The revision of water gate design standard should include not only the stability of the structure against sliding and the stability of foundation stress,but also the stability of gate chamber against floating.Under the guidance of Unified Design standard for Reliability of Hydraulic Engineering Structures,this paper analyzes and derives the formula for the ultimate limit states of stability against floating of gate chambers,and proposes the corresponding partial factors.The rationality of results is examined by the aid of 9 completed or to-be-built gate projects.