摘要
本文研究了荷载(小于200kPa)对浅基础地基土冻胀变形的抑制作用。试验表明,在外荷载为200kPa时,极强冻胀性地段的冻胀量可减少44—52％。最小抑制冻胀带的厚度可达80cm左右。依试验结果,给出了荷载(0—200kPa)对不同冻胀性地基土冻胀的抑制系数,以此可以推算基底下冻土层的冻胀衰减量。
In order to meet the requirement for the design of shallow foundations of light building in seasonal frost areas, the authors studied the effect of lightpressure (<200 kPa) on frost heaving through in-situ tests, the test results show that the total amountof frost heaving decreases with increasing pressure. It can be reduced by 44-52% in the high frost susceptible soils when the pressure is equal to 200 kPa. The effective denth of frost heaving beneath foundationsincreases with increasing pressure. It is about 80 cm when the pressure is equal to 150-200 kPa. Accordign to the test results, the influence coefficdients of surchange on frost heaving for various kinds frost susceptible soils are given which can be used to estimate the attenuation of frost heaving of subsoils.
出处
《冰川冻土》
CSCD
北大核心
1990年第3期193-199,共7页
Journal of Glaciology and Geocryology
关键词
冻土
冻胀
荷载
基础
clay, foundation, frost heave, insitu testing, seasonal frost
