刚柔复合抗滑桩受力与变形特性数值模拟分析
发布时间：2018-10-24 12:30
【摘要】：基于某高速公路路堤边坡支挡工程,采用有限差分软件FLAC3D分别建立普通刚性抗滑桩和刚柔复合抗滑桩加固边坡的三维数值模型,对比分析两种抗滑桩结构的受力与变形特性,进而探讨柔性材料厚度、柔性材料弹性模量及抗滑桩弹性模量等关键设计参数对刚柔复合抗滑桩受力与变形特性的影响.研究结果表明:与普通刚性抗滑桩相比,刚柔复合抗滑桩可以明显减小桩身弯矩、剪力及桩侧土压力,但会在一定程度上增大桩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围内减小抗滑桩内力和桩侧土压力,但减小程度有限,柔性材料弹性模量对抗滑桩受力特性影响较小;适当减小抗滑桩的弹性模量可以明显降低抗滑桩内力.
[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.
【作者单位】： 华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金资助项目(51278216) 黄土地区公路建设与养护技术交通行业重点实验室开放课题资助项目(KLTLR-Y14-2)
【分类号】：TU473.1
[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.
【作者单位】： 华中科技大学土木工程与力学学院;
【基金】：国家自然科学基金资助项目(51278216) 黄土地区公路建设与养护技术交通行业重点实验室开放课题资助项目(KLTLR-Y14-2)
【分类号】：TU473.1
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