高填方涵洞土压力受多种因素的影响。在对高填方涵洞受力影响因素归纳的基础上，筛选出埋设涵洞的沟谷宽度、沟谷边坡角度、地基土模量、填土模量、填土黏聚力和内摩擦角这6个主要影响因素，通过数值模拟对涵顶土压力系数的变化规律进行了分析，确定了上述6个因素产生有效影响的取值区间。根据正交试验原理，建立25个正交化数值模拟试验模型，针对上述6个主要影响因素，对高填方涵洞进行了影响因素敏感性分析，最后的极差分析结果表明，埋设涵洞的沟谷宽度和沟谷边坡角度是影响高填方涵洞涵顶土压力的最为主要和敏感的因素；填土模量、填土内摩擦角和地基模量对涵顶土压力有较显著影响；填土的黏聚力对涵顶土压力影响较小。%The earth pressure of high embankment culvert is influenced by many internal and external factors. Based on the induction of factors influence the earth pressure on high embankment culvert, the valley width, slope angle, substrate soil modulus, modulus, cohesion and internal friction angle of embankment fill are screened out as the 6 main influencing factors. The variations of coefficient of earth pressure on the crown of culvert are analyzed via numerical simulation, and the range of the factors have effective influence on the earth pressure are determined. According to the principle of orthogonal test, 25 numerical models are installed for the analysis of the sensitivity of influence factors on the earth pressures on high embankment culvert. The results show that, the width and slope angle of the trench are the most important and sensitive factors for the earth pressures on the crown of the high embankment culvert. The modulus and friction angle of the backfill, as well as the subgrade modulus have secondary significant effect on the earth pressure. However the cohesion of the backfill has little effect on the earth pressure.
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