关键词: 推力桩, 双参数法, 综合刚度, 截面优化

Abstract: Using the composite stiffness principle and double parameters method, and choosing suitable parameters, ground displacement, angle and maximum bending moment of laterally loaded pile with four kinds of section types such as reinforced concrete pipe pile, reinforced concrete circular pile, reinforced concrete rectangular pile and steel tube confined concrete pile in different engineering geological conditions are calculated. Crack width of reinforced concrete pile and strength of steel tube confined concrete pile are checked; analysis and comparison of bearing capacities of long piles with different kinds of section types under same laterally loads in different engineering geological conditions are also made. These results can be used for optimum design of reasonable section type of laterally loaded piles of large building structures. The comprehensive evaluation shows that the reinforced concrete pipe pile is better for sand soil and clay soil; steel tube confined concrete pile is better for weathered rock.

Key words: laterally loaded pile, two parameters method, composite stiffness principle, sectional optimization