- 摘 要
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楊建民1,2,司航1
（1 天津大學(xué)建筑工程學(xué)院土木工程系， 天津 300072；
2 濱海土木工程結(jié)構(gòu)與安全教育部重點實驗室（天津大學(xué)）， 天津 300072）
［摘要］抗滑樁是土質(zhì)邊坡滑坡防護(hù)與治理的一種重要手段，抗滑樁上滑坡推力分布是樁截面和配筋設(shè)計的重要依據(jù)。目前國內(nèi)外廣泛采用的抗滑樁滑坡推力分布計算是Ito基于塑性變形提出的方法。在Ito方法的基礎(chǔ)上，改進(jìn)其計算理論的基本假設(shè)條件，即考慮樁后土體滑動面上的摩擦力影響，經(jīng)重新推導(dǎo)提出一種改進(jìn)的滑坡作用在抗滑樁上水平推力分布的計算公式。與Ito原文中算例的原公式計算結(jié)果和實測結(jié)果比較，改進(jìn)后的公式計算值更符合實測結(jié)果。與成昆鐵路沙北Ⅰ號滑坡5號樁的實測數(shù)據(jù)比較，改進(jìn)后的公式計算值較為符合。改進(jìn)后的抗滑樁滑坡推力計算方法對于土質(zhì)邊坡抗滑樁設(shè)計具有借鑒價值和適用性。
［關(guān)鍵詞］土質(zhì)邊坡； 抗滑樁； 滑坡推力； 塑性變形
中圖分類號： TU413.6+2 文獻(xiàn)標(biāo)識碼： A 文章編號： 1002-848X(2015)S2-0248-06
A modified calculation method for the distribution of lateral force acting on
stabilizing piles in soil slopes
Yang Jianmin1,2, Si Hang1
(1 Department of Civil Engineering, Tianjin University, Tianjin 300072, China)
2 Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China)
Abstract: Setting stabilizing piles is one of the significant measures to avoid landslides or slope failures, and the basis of the design of the piles, such as section size and reinforcement, is the distribution of landslide thrust force acting on the piles. One of the most widely used methods to estimate the force is proposed by Ito, which is based on the theory of plastic deformation. Ito′s method was optimized by means of considering the frictional force acting on the surface between the piles and soil. Then, the new formulas was deduced, and contrast with Ito′ method through the analysis of the examples quoted by Ito, in which the new method was more close to the observed values. The similar conclusion also can be obtained through the contrast in the example of 5# pile in Shabei Slope. So the optimized method to estimate the landslide thrust force in soil slope has great reference value and applicability in the design of stabilizing piles.
Keywords: soil slope; stabilizing pile; landslide thrust force; plastic deformation
作者簡介：楊建民，博士，副教授，Email:yangjianmin@tju.edu.cn。
