沟埋式钢波纹管涵顶部垂直土压力计算模型研究

管涵周围土压力的分布规律对管涵结构的设计具有重要的参考价值,然而采用传统M-S理论计算管涵顶部垂直土压力存在一定的局限性。针对这一问题,以沟埋式管涵为研究对象,首先运用理论分析的方法对土体在沟槽摩擦作用下形成的小主应力拱展开了研究,并据此对矩形沟槽管涵的侧压力系数和顶部垂直土压力计算公式加以推导。然后以具体工程为例,对公式的合理性进行了探讨和分析,并对管涵的设计提出了一些合理性建议。

Study on Calculation Model of Vertical Earth Pressure on Top of Trench-buried Steel Corrugated Pipe Culvert

The distribution law of earth pressure around the pipe culvert has important reference value for the design of the pipe culvert structure.However,the calculation of the vertical earth pressure at the top of the pipe culvert using the traditional M-S theory has certain limitations.In response to this problem,the trench-buried pipe culvert was taken as the research object.Theoretical analysis method was used to study the small principal stress arch formed by the soil under the friction of the trench,based on which the calculation formula of the coefficient of lateral pressure and the vertical earth pressure at the top of the rectangular trench culvert were derived.Taking the specific project as an example,the rationality of the formula was discussed and analyzed,and some reasonable suggestions were proposed for the design of the pipe culvert.