坡面锚索与坡脚抗滑桩联合加固边坡设计方法
发布时间：2019-06-14 04:07
【摘要】：路堑高陡边坡的加固中,二级及以上边坡坡面锚索与一级边坡坡脚抗滑桩的组合结构应用广泛,但其设计方法尚不成熟,为此,提出该组合结构的优化设计方法.首先,研究坡面单束锚索预应力对滑体各条块的作用效果;继而,通过预应力锚固后的边坡稳定性计算,获得设桩处的剩余下滑力、确定抗滑桩上的荷载,实现锚索预应力和抗滑桩被动力的协调作用;最后,以广(通)大(理)铁路某实际边坡为例,论证所提方法的设计过程.论证结果表明:该组合结构的设计可以锚索预应力占总下滑力的40%进行初算,并以抗滑桩中心间距5.0~8.0 m、桩截面宽度1.0~3.0 m、截面高度1.5~4.0 m、嵌固段长度为总桩长的1/3~1/2为控制条件.
[Abstract]:In the reinforcement of high and steep cutting slope, the composite structure of secondary slope anchor cable and first grade slope foot anti-slide pile is widely used, but its design method is not yet mature. Therefore, the optimal design method of the composite structure is put forward. Firstly, the effect of single anchor cable prestress on each block of slide body is studied; then, through the calculation of slope stability after prestress anchoring, the residual sliding force at the pile is obtained, the load on the anti-slide pile is determined, and the coordination between the anchor cable prestress and the anti-slide pile is realized. Finally, taking a practical slope of Guang (Tong) large railway as an example, the design process of the proposed method is demonstrated. The results show that the design of the composite structure can be calculated with anchor cable prestress accounting for 40% of the total sliding force, and the control conditions are as follows: the center spacing of anti-slide pile is 5.0 鈮，
本文编号：2499085
[Abstract]:In the reinforcement of high and steep cutting slope, the composite structure of secondary slope anchor cable and first grade slope foot anti-slide pile is widely used, but its design method is not yet mature. Therefore, the optimal design method of the composite structure is put forward. Firstly, the effect of single anchor cable prestress on each block of slide body is studied; then, through the calculation of slope stability after prestress anchoring, the residual sliding force at the pile is obtained, the load on the anti-slide pile is determined, and the coordination between the anchor cable prestress and the anti-slide pile is realized. Finally, taking a practical slope of Guang (Tong) large railway as an example, the design process of the proposed method is demonstrated. The results show that the design of the composite structure can be calculated with anchor cable prestress accounting for 40% of the total sliding force, and the control conditions are as follows: the center spacing of anti-slide pile is 5.0 鈮，
本文编号：2499085
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