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季节性冻土地区,在确定桥涵基础埋置深度时,除需满足地基承载力、基础稳定性和冲刷等要求外,很重要的一点是要考虑地基土冻胀作用的影响。尤其中小桥涵,冲刷小、结构自重轻,有的无明显河床,仅从路线边沟排水和地形条件要求按构造设置。从地基承载力和冲刷等要求,基础则不必埋得很深,此时,影响基础埋深的主要因素就是冻结深度的要求了。
Seasonal frozen soil areas, in determining the depth of embankment foundation, in addition to meet the foundation bearing capacity, foundation stability and erosion requirements, it is important to consider the impact of frost heave on the foundation soil. In particular, medium and small bridges and culverts, scouring small, light weight structure, and some without significant riverbed, drainage and terrain conditions only from the requirements of the structure set. From the foundation bearing capacity and erosion requirements, the foundation does not have to be buried deep, this time, the main factor affecting the depth of the foundation is to freeze the depth requirements.