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近来随着道路整治的进步,作为排水侧沟采用予制混凝土U形渠槽日益增多,其冻胀破坏已成为前所未见的问题.作者以JISA5305规定的混凝土予制U形渠槽作为试验设置,对冬季由于地基冻结而产生的冻结土压力及变形,从1985年以来继续在进行试验研究.其实验结果的一部分曾在文献(1)中作了如下阐述:(1)由于地基冻结而造成混凝土予制U形渠槽的破坏,主要是因周边地基的冻结土压力的挤压破坏;(2)在试验条件下产生冻结土压力的大小,往往会超过JIS规定的予制渠槽的抗破坏强度;(3)渠槽侧
Recently, with the advancement of road improvement, the use of pre-prepared concrete U-shaped channels as drainage side ditches has been increasing, and frost heaving damage has become an unprecedented problem. The authors used the concrete pre-made U-shaped channels defined in JISA 5305 as a test. The freezing soil pressure and deformation caused by the freezing of the foundation in winter were set to continue the experimental study since 1985. A part of the experimental results was described in the literature (1) as follows: (1) Due to the freezing of the foundation Destruction of U-shaped channels caused by concrete is mainly due to the crushing failure of frozen earth pressure of surrounding foundations; (2) The size of frozen earth pressure generated under test conditions often exceeds the pre-made channels of JIS regulations. Resistance to damage; (3) Slot side