Numerical Experimental Study on Compressive Bearing Capacity of Vertical and Inclined Combined High-Pressure Jet Grouting Pile Foundation
The construction of high-voltage tower foundations in mountainous areas is characterized by high difficulty,long cycle,high cost,and low degree of mechanized construction.To improve the construction efficiency of tower foundation,this article proposes a new type of tower foundation form:straight inclined combination high-pressure rotary jet grouting pile.Using the finite element software PLAXIS 3D,numerical experiments were conducted to study the vertical bearing performance and internal force evolution of the vertically inclined combination high-pressure rotary jet grouting pile foundation.The research results indicate that:1)When the inclination angle of the inclined pile is the same,the variation law of the bending moment of the pile body is basically the same,and the maximum bending moment value is located near the pile top and decreases with the increase of the pile aspect ratio;2)Under vertical load,the axial force of straight piles is greater than that of inclined piles;3)When the length to diameter ratio of the pile is the same,the compressive bearing capacity of the high-pressure rotary jet grouting pile foundation of the straight inclined combination shows a nonlinear increasing relationship with the increase of the inclined pile inclination angle(0 °,10 °,20 °).The vertical bearing performance of the vertically inclined combination high-pressure rotary jet grouting pile foundation is good,and it is worth promoting and applying.
NETL
NSTL
万方数据
