多级加筋土高陡边坡工程特性及影响因素分析  

Analysis of Engineering Characteristics and Influencing Factors of Multi-stage Reinforced Soil High Steep Slope

作　　者：赵明发 杨旭峰 杨广庆 ZHAO Mingfa;YANG Xufeng;YANG Guangqing(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;China Railway Construction Bridge Engineering Bureau Group No.5 Engineering Co.Ltd.,Chengdu,Sichuan 610000,China;Hebei Engineering Research Center on Application of Geosynthetics,Shijiazhuang,Hebei 050043,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]中铁建大桥工程局集团第五工程有限公司,四川成都610000 [3]土工合成材料应用河北省工程研究中心,河北石家庄050043

出　　处：《河北工程大学学报(自然科学版)》2025年第1期66-74,81,共10页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(52079078)。

摘　　要：通过对四级加筋土高陡边坡工程现场试验,研究了多级有纺高强聚酯土工布加筋高陡边坡基底垂直应力的分布规律,结果表明,基底垂直应力沿筋材方向呈现非线性分布,最大值出现在筋材末端。利用PLAXIS 2D对四级加筋土高陡边坡断面进行数值模拟,研究了该多级加筋陡坡结构的返包体背部水平土压力、各级边坡坡面水平变形、土工布应变以及边坡潜在破裂面等结构特性变化规律,并分析了筋材长度、筋材间距、填料内摩擦角以及平台宽度等影响因素对边坡水平变形特性的影响。研究得出,各级边坡水平土压力在平台处发生突变,沿坡高呈现锯齿状分布;各级边坡坡面水平变形在不同位置处均出现明显的“鼓肚”现象;不同高度处土工布应变沿筋材铺设方向呈非线性分布,并且呈现“双峰”与“单峰”两种分布形式;边坡潜在破裂面存在整体圆弧滑动破裂面和复合式破裂面两种形式,进一步发现筋材间距和长度对高陡边坡水平变形影响较为显著。Through field tests on a four-level reinforced soil high steep slope project,the distribution law of vertical stress at the base of a multi-level spun high-strength polyester geotextile reinforced high steep slope was studied.The results showed that the vertical stress at the base exhibited a nonlinear distribution along the direction of the reinforcement material,with the maximum value occurring at the end of the reinforcement material.Using PLAXIS 2D,numerical simulations were conducted on the crosssection of a four-level reinforced soil steep slope to study the changes in structural characteristics such as horizontal soil pressure on the back of the backfill body,horizontal deformation of the slope surface at each level,geotextile strain,and potential fracture surface of the slope.The influence of factors such as reinforcement length,spacing between reinforcement materials,friction angle inside the filling material,and platform width on the horizontal deformation characteristics of the slope was also analyzed.Research has shown that the horizontal soil pressure on various levels of slopes undergoes a sudden change at the platform,exhibiting a serrated distribution along the slope height;The horizontal deformation of slope surfaces at all levels shows obvious“bulging”phenomena at different positions;The strain of geotextile at different heights shows a nonlinear distribution along the direction of reinforcement laying,and pre-sents two distribution forms:“double peak”and“single peak”;There are two types of potential frac-ture surfaces for slopes:integral circular sliding fracture surfaces and composite fracture surfaces.It was further found that the spacing and length of reinforcement materials significantly impact the horizontal deformation of high and steep slopes.

关 键 词：四级加筋土高陡边坡 现场试验 结构特性 影响因素 

分 类 号：TU43[建筑科学—岩土工程]