Abstract Load-shedding culvert is a new rigid culvert type to improve the performance of load reduction method. This study is to analyze the effect of vertical earth pressure on the top of load-shedding culvert through analytical model. The proposed analytical solutions are validated by the numerical results and laboratory measurements. Then, using the verified analytical model, a series of parametric studies are performed to investigate the influence of several relevant parameters on vertical earth pressure of load-shedding culvert. Moreover, the effect of elastic moduli and thickness of flexible material is discussed with numerical simulations and analytical method. The results indicate that the backfill height, properties of backfill, properties of soft layer and dimensions of load-shedding culvert have significant influence on the vertical earth pressure of load-shedding culvert. In addition, considering the load reduction effect, culvert dimensions and construction costs, the reasonable design perimeters are recommended from 0.1 to 0.2 and 0.06 to 0.13 for the ratios of load shedding block width to culvert width and the flexible material height to culvert width, respectively. Moreover, the elastic modulus ratio of backfill soil to that of flexible material is suggested no less than 20.

中文翻译：

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高填方减载涵洞竖向土压力解析解

摘要 减载涵管是一种新型刚性涵管，旨在提高减载性能。本研究旨在通过解析模型分析竖向土压力对减载涵洞顶部的影响。所提出的解析解通过数值结果和实验室测量得到验证。然后，利用经过验证的分析模型，进行了一系列参数研究，研究了几个相关参数对卸荷涵洞竖向土压力的影响。此外，通过数值模拟和解析方法讨论了弹性模量和柔性材料厚度的影响。结果表明，回填高度、回填性质、软土层的性质和减载涵的尺寸对减载涵的竖向土压力有显着影响。此外，考虑减荷效果、涵洞尺寸和施工成本，合理的设计周长分别为减载块宽与涵宽比和柔性材料高度与涵宽比分别为0.1～0.2和0.06～0.13。 . 此外，回填土的弹性模量与柔性材料的弹性模量比建议不小于20。13 分别为减载块宽度与涵洞宽度和柔性材料高度与涵洞宽度的比率。此外，回填土的弹性模量与柔性材料的弹性模量比建议不小于20。13 分别为减载块宽度与涵洞宽度的比率以及柔性材料高度与涵洞宽度的比率。此外，回填土的弹性模量与柔性材料的弹性模量比建议不小于20。