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确定斜坡地基比例系数m值的模型试验研究
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Model Test Study on Identification of Foundation ProportionalCoefficient m in Slope Ground
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    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x>10 mm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=10 mm对应的m值.

    Abstract:

    To examine the influence of slope angles and horizontal loading angles on the foundation proportional coefficient m in slope grounds,model tests of in-slope steel piles were designed and implemented,and the m-values under different slope angles and horizontal loading angles were then obtained.Model tests revealed that the m-value decreased nonlinearly with the increase of the slope angle α,horizontal loading angle β and lateral displacement x of piles at the ground surface.The m-value almost kept the same when the value of x was more than 10 mm.Moreover,the relationship among m-value and slope angle α and horizontal loading angle β was established.The contrastive analysis showed that the theoretical calculation result under the consideration of the slope space effect when determining the m-value was close to the test result,and the maximum error was no more than 10%.It is suggested to adopt the m-value when the value of x is 10 mm for the design of in-slope piles.

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尹平保,赵明华,贺炜,赵衡,张建仁.确定斜坡地基比例系数m值的模型试验研究[J].湖南大学学报:自然科学版,2017,44(9):158~164

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  • 在线发布日期: 2017-10-10
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