确定斜坡地基比例系数m值的模型试验研究

发布时间：2018-03-23 21:15

本文选题：地基比例系数　切入点：模型试验　出处：《湖南大学学报(自然科学版)》2017年09期

【摘要】：为研究斜坡坡度及水平荷载作用角度对斜坡地基比例系数m值的影响,设计并完成了一系列斜坡地基刚性桩水平承载室内模型试验,测得了不同斜坡坡度及水平荷载作用角度下地基比例系数m值.试验发现:斜坡地基比例系数m值随地面处桩身水平位移x、斜坡坡度α及水平荷载作用角度β增加呈非线性减小,当x10mm时,m值几乎保持为一定值,并据此建立了斜坡地基比例系数m值与坡度α及荷载作用角度β之间的拟合关系式.理论与试验对比分析表明:根据考虑斜坡空间效应影响确定的斜坡地基比例系数m值,计算得到的桩身内力、位移与实测结果最接近,最大计算误差小于10%;斜坡桩基设计时,建议取地面处桩身水平位移x=10mm对应的m值.
[Abstract]:In order to study the influence of slope gradient and horizontal loading angle on the slope foundation proportional coefficient m, a series of indoor model tests of rigid piles on slope foundation were designed and completed. The ratio coefficient m of slope slope and horizontal load is measured. It is found that the ratio coefficient m of slope foundation increases with the horizontal displacement of pile body, slope gradient 伪 and horizontal load angle 尾. The addition is nonlinear, When x10mm, the value of m is almost kept to a certain value, On the basis of this, the fitting relation between the ratio coefficient m value of slope foundation and slope degree 伪 and loading angle 尾 is established. The comparison and analysis of theoretical and experimental results show that the slope foundation proportional coefficient m value is determined by considering the influence of slope space effect. The calculated internal force displacement is the closest to the measured results and the maximum calculation error is less than 100.When the slope pile foundation is designed it is suggested that the m value corresponding to the horizontal displacement of the pile body x=10mm at the ground should be taken.
【作者单位】：长沙理工大学道路灾变防治及交通安全教育部工程研究中心;长沙理工大学土木与建筑学院;现代公路交通基础设施先进建养技术湖南省协同创新中心;湖南大学岩土工程研究所;
【基金】：国家自然科学基金资助项目(51408066,51478051,51608540) 湖南省教育厅优秀青年项目(16B013) 长沙理工大学道路灾变防治及交通安全教育部工程研究中心开放基金项目(kfj140405);长沙理工大学土木工程优势特色重点学科创新性项目(16ZDXK02)~~
【分类号】：TU41

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