【摘要】：基于某高速公路路堤邊坡支擋工程,采用有限差分軟件FLAC3D分別建立普通剛性抗滑樁和剛?cè)釓?fù)合抗滑樁加固邊坡的三維數(shù)值模型,對(duì)比分析兩種抗滑樁結(jié)構(gòu)的受力與變形特性,進(jìn)而探討柔性材料厚度、柔性材料彈性模量及抗滑樁彈性模量等關(guān)鍵設(shè)計(jì)參數(shù)對(duì)剛?cè)釓?fù)合抗滑樁受力與變形特性的影響.研究結(jié)果表明:與普通剛性抗滑樁相比,剛?cè)釓?fù)合抗滑樁可以明顯減小樁身彎矩、剪力及樁側(cè)土壓力,但會(huì)在一定程度上增大樁身自由段和填土的水平位移;增大柔性材料厚度可在一定范圍內(nèi)減小抗滑樁內(nèi)力和樁側(cè)土壓力,但減小程度有限,柔性材料彈性模量對(duì)抗滑樁受力特性影響較小;適當(dāng)減小抗滑樁的彈性模量可以明顯降低抗滑樁內(nèi)力.
[Abstract]:Based on the embankment slope retaining engineering, the 3D numerical models of common rigid anti-slide pile and rigid-flexible composite anti-slide pile are established by using the finite difference software FLAC3D, and the stress and deformation characteristics of the two kinds of anti-slide pile structures are compared and analyzed. The influence of key design parameters, such as the thickness of flexible material, elastic modulus of flexible material and elastic modulus of anti-slide pile, on the mechanical and deformation characteristics of rigid-flexible composite anti-slide pile is discussed. The results show that compared with the common rigid anti-slide pile, the rigid and flexible composite anti-slide pile can obviously reduce the pile bending moment, shear force and soil pressure on the side of the pile, but increase the horizontal displacement of the free section of the pile body and the fill to a certain extent. Increasing the thickness of flexible material can reduce the internal force of anti-slide pile and the soil pressure of pile side in a certain range, but the degree of reduction is limited, and the elastic modulus of flexible material has little effect on the mechanical characteristics of the pile. The internal force of anti-slide pile can be obviously reduced by decreasing the elastic modulus of anti-slide pile.
【作者單位】： 華中科技大學(xué)土木工程與力學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51278216) 黃土地區(qū)公路建設(shè)與養(yǎng)護(hù)技術(shù)交通行業(yè)重點(diǎn)實(shí)驗(yàn)室開放課題資助項(xiàng)目(KLTLR-Y14-2)
【分類號(hào)】：TU473.1

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