箱型竖向预应力抗滑桩的机理研究

Study on Mechanism of Box Vertical Pre-stressed Anti-slip Pile

箱型竖向预应力抗滑桩是一种新型抗滑桩,截止目前国内外尚未发现此类研究成果,通过建立有限元模型,采用三种不同结构抗滑桩,即传统实心抗滑桩、箱型钢筋混凝土抗滑桩和箱型竖向预应力混凝土桩,在不同混凝土等级强度和1 000 kN、1 500 kN、2 000 kN三种滑坡推力等条件下进行计算,根据桩身位移、剪力和弯矩大小变化进行对比分析后,说明箱型竖向预应力抗滑桩抗滑效果远远优于其它抗滑桩,同时该桩也具滑坡体内排水,节省工程费用及抗滑桩内检测维护方面的优点,值得进一步研究和推广。

The box vertical pre-stressed anti-slip pile is a new anti-slip pile. There is no this kind of study result now at home and abroad. The finite element model is established to calculate three different structural anti-slip pile of traditional solid anti-slip pile, box steel reinforced concrete anti-slip pile and box vertical pre-stressed concrete pile under the conditions of the different concrete grading intensities and three landslide thrusts of 1 000 kN, 1 500 kN and 2 000 kN. According to the comparison and analysis of displacement, shear and bending moment variation of pile body, the results show that the anti-slip effect of box vertical pre-stressed anti-slip pile is far better than the other anti-slip piles, and also this pile has the advantages of landslide in-drainage, saving engineering cost and inspection and maintenance within anti-slip pile. This pile is worth further study and promotion.