饱和红黏土中水平矩形锚板上拔承载特性试验研究  

Experimental Study on Uplift Capacity of Horizontal Rectangular Anchor Plate in Saturated Red Clay

作　　者：罗广 胡伟[1,2] 杜弘毅 王辉 张翰林[2] LUO Guang;HU Wei;DU Hong-yi;WANG Hui;ZHANG Han-lin(Hunan Province Key Laboratory of Geotechnical Engineering Stability Control and Health Monitoring,Hunan University of Science and Technology,Xiangtan 411201,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学,岩土工程稳定控制与健康监测湖南省重点实验室,湘潭411201 [2]湖南科技大学土木工程学院,湘潭411201

出　　处：《科学技术与工程》2025年第7期2897-2903,共7页Science Technology and Engineering

基　　金：国家自然科学基金(52178332)。

摘　　要：针对红黏土地基中水平矩形锚板上拔承载特性,通过自制的可视化拉拔模型试验系统,结合数字照相测量技术,开展了饱和红黏土地基中水平矩形锚板的竖向拉拔模型试验。结果表明:锚周土体滑动面随埋深比的变化呈现不同形态,但初始角并不随埋深比发生变化。荷载位移曲线一般具有较明显的峰值特征,但随着埋深比的增大,该特征逐渐减弱;埋深比相同时,长宽比越小,锚板承载的三维特性越显著,曲线的峰值特征也越明显。承载力系数随着埋深比的增加呈增大趋势,但不同长宽比下的规律有所差别;承载力系数随长宽比的增加呈减小趋势,且不同埋深比下的变化规律较为一致。结论:对于试验红黏土,至少在埋深比4的范围内,锚板可归为浅埋型,埋深比大于8的情况则已属于深埋型。同等条件下,受黏聚力和剪胀性的影响,锚板抗拔承载力系数在红黏土地基中的数值介于松砂地基和密砂地基之间。According to the drawing load characteristics of horizontal rectangular anchor plate in red clay foundation,the vertical drawing model test of horizontal rectangular anchor plate in saturated red clay foundation is carried out by using a self-made visual drawing model test system combined with digital photographic measurement technology.The results show that the sliding surface of soil around the anchor shows different shapes with the change of buried depth ratio,but the initial Angle does not change with the change of buried depth ratio.The load displacement curve generally has obvious peak characteristics,but with the increase of the buried depth ratio,the characteristics gradually weaken.When the buried depth ratio is the same,the smaller the length-width ratio is,the more obvious the three-dimensional bearing characteristics of the anchor plate and the peak characteristics of the curve are.The bearing capacity coefficient increases with the increase of buried depth ratio,but the law is different under different aspect ratio.The bearing capacity coefficient decreases with the increase of length-width ratio,and the change law is consistent under different buried depth ratio.Conclusion:For test red clay,the anchor plate can be classified as shallow buried type at least within the range of buried depth ratio 4,and deep buried type if the buried depth ratio is greater than 8.Under the same conditions,under the influence of cohesion and dilatancy,the tensile strength coefficient of anchor plate in red clay foundation is between loose sand foundation and dense sand foundation.

关 键 词：矩形锚板 红黏土 长宽比 埋深比 滑动面 极限承载力 

分 类 号：TU43[建筑科学—岩土工程]