發(fā)布時間：2019-06-14 04:07

【摘要】：路塹高陡邊坡的加固中,二級及以上邊坡坡面錨索與一級邊坡坡腳抗滑樁的組合結(jié)構(gòu)應(yīng)用廣泛,但其設(shè)計方法尚不成熟,為此,提出該組合結(jié)構(gòu)的優(yōu)化設(shè)計方法.首先,研究坡面單束錨索預(yù)應(yīng)力對滑體各條塊的作用效果;繼而,通過預(yù)應(yīng)力錨固后的邊坡穩(wěn)定性計算,獲得設(shè)樁處的剩余下滑力、確定抗滑樁上的荷載,實現(xiàn)錨索預(yù)應(yīng)力和抗滑樁被動力的協(xié)調(diào)作用;最后,以廣(通)大(理)鐵路某實際邊坡為例,論證所提方法的設(shè)計過程.論證結(jié)果表明:該組合結(jié)構(gòu)的設(shè)計可以錨索預(yù)應(yīng)力占總下滑力的40%進行初算,并以抗滑樁中心間距5.0~8.0 m、樁截面寬度1.0~3.0 m、截面高度1.5~4.0 m、嵌固段長度為總樁長的1/3~1/2為控制條件.
[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，

本文編號：2499085