Abstract:Regarding the design of the high-pile approach trestle structure for offshore oil and gas public pipe gallery,This article combines engineering examples to conduct structural design on different high-pile approach trestle structures.Through spatial model calculation and analysis,cost analysis,and scheme comparison,the influence of different framed bent spacing,pile foundation types,upper structures of approach trestle,and pipe frame structures on the cost of approach trestle structures is studied.The research results indicate that increasing framed bent spacing can reduce the cost of pile foundation engineering,but framed bent spacing increases the cost of the upper structure.Comprehensive analysis shows that the framed bent spacing of 18 m reduces the cost of the 9 m approach trestle structures by 2.43%,but the cost reduction is not significant.The cost of the large pipe pile approach trestle structure is reduced by 107,900 yuan per metre compared to the cast-in-place pile,and the large pipe pile has a significant cost advantage.The cost of steel structure pipe racks is 32% higher than that of concrete pipe racks,and the cost of public pipe galleries using concrete pipe racks is 3.12% lower than using steel structure pipe racks,but the cost reduction is not significant.For similar projects,priority can be given to using large pipe piles or other driven piles.The pipe frame structures type and framed bent spacing have no significant impact on the cost,and a comprehensive plan can be determined after comparative analysis.
