1000 Mpa级钢在超高HD值埋藏式月牙肋钢岔管设计中的应用比较OA

Taking the embedded crescent rib steel branch pipe of a pumped storage power station as the research object,based on the finite element method,1 000 MPa-grade high-strength steel and traditional 800 MPa-grade high-strength steel are adopted.On the basis of the proposed structural parameters of the steel branch pipe,considering the combined bearing of surrounding rock and steel branch pipe,the wall thicknesses of the steel branch pipes corresponding to the two steel materials are calculated and determined,the stress levels of key parts are analyzed,and the stresses under the exposed pipe condition are checked.The results show that compared with the traditional 800 MPa-grade steel,the wall thickness of the steel branch pipe can be reduced by about 20%when 1 000 MPa-grade steel is used,which can significantly reduce the welding workload and the difficulty of on-site transportation and hoisting.The research results can provide material and technical support for the design of embedded crescent rib steel branch pipes with ultra-high HD value(HD>4 500 m·m).