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中文摘要：
为了改变由于土工织物的存在抑制了落水洞上覆路堤土不均匀变形,使得路堤中的土拱效应和剪应力不能完全发展的问题,提出了基于不完全发展的土拱效应的设计方法.首先根据Handy的土拱为最小主应力拱的假设,利用摩尔圆推导出了在土工织物不同挠曲变形时土中剪应力的计算方法.然后将其与土拱效应的计算理论相结合提出了不完全发展的土拱效应计算公式.最后考虑不同的填土高度,以不完全发展的土拱效应计算理论为基础得到土拱高度确定方法.利用数值分析和本文方法以及现有的设计方法分别计算同一算例,结果表明,所提出的方法与数值分析计算结果更为接近.这证明在用土工织物加固落水洞上覆路堤时考虑土中剪应力的不完全发展更符合工程的实际情况.
英文摘要：
The current methods of designing the embankment over sinkholes reinforced by geosynthetic are based on the assumption that the shear stress in the fill soil is fully-developed.However,the existence of the geosynthetic can block the development of the differential settlement,which can consequently induce the partially developing of the shear stress and the soil arching effect.To overcome this insufficiency,a new method is proposed,which is based on the assumption presented by Handy that the soil arch is the minor principle stress arch.By using the Mohr circle the formula of shear stress at different geosynthetic deflection is derived.Combining with the soil arching calculation procedure,the partially-developing soil arching method is presented.Finally,considering the different height of the embankments,the soil arch height determination method is developed based on the proposed partially-developing soil arching method.A comparison of the results from the numerical method,the proposed method,and the current design method demonstrates that the proposed method is more close to the numerical result,which means the proposed method is more accurate than the current design method.
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