摘要
通过试验模拟了具有一定水泥掺量的水泥土在各种环境因素(水、不同化学溶液、不同浓度以及不同pH值等)下的侵蚀作用,进行了水泥土试件90d的无侧限抗压强度试验·探讨了水泥土受各种环境因素的侵蚀效应、破裂行为与机理·结果表明,酸性和高浓度化学溶液侵蚀环境对水泥土力学性能的劣化明显;而碱性和部分低浓度化学溶液环境对水泥土力学性能具有一定促进作用·据此,对水泥土桩竖向承载力的设计公式进行了环境效应修正,提出了环境效应因子的概念,并对其取值进行了分析·
Some testings were done under different conditions of environmental erosion, including water and chemical solutions with different concentrations and pH values, to simulate the erosion effect on the cement-mixed soil of which the mixing ratio is specified and the specimens were sampled from the silty clay soil about 3m deep under a roadbed. The test of unconfined compression strength of cement-mixed soil was carried out with the specimens cured for 90 days. A conclusion showed that the strength of cement-mixed soil decreased in acid and high strength solutions. On the contrary, strength increased evidently in alkaline environment. Therefore, the design formula of upright bearing capacity of cement-mixed soil pile is modified due to environmental erosion, and a coefficient named environmental effect factor is proposed with its range of value discussed.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第1期95-98,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50474017)
关键词
水泥土
环境侵蚀
抗压强度
水泥土桩
竖向承载力
cement-mixed soil, environmental erosion, compression strength, pile, vertically bearing capacity
