摘要
研究目的:本文就《铁路工程基桩检测技术规程》中单桩竖向抗压静载试验应注意的问题进行论述,以指导施工实际。研究结论:准确掌握单桩竖向抗压静载试验,要重视现场的实施操作细则,方法应采用慢速维持荷载法,地基承载力满足地基压应力,所用仪器、设备在标定有效期内,基准梁一端固定、一端简支,最大有效加载量应不小于设计单桩承载力特征值的2.0倍,每级荷载施加时间不小于2 h、且达到沉降相对稳定标准,单桩竖向抗压承载力特征值是单桩竖向抗压极限承载力的一半;全过程达到规范化、程序化,即可检测得到准确的单桩竖向承载力。
Research purposes： This paper discusses the issues for caution on the vertical compressive load test to single pile according to The Technical Rules for Test Technology for Railway Engineering Foundation Piles for guiding the engineering works.Research conclusions：To correctly do the situ operational detailed rules and regulati bearing vertical compression load test to single pile, attention should be paid to the in ons, the slow maintained load test method should be adopted, the foundation capacity should bear the compressive stress, the used instruments and equipments should be in the period of validity, the maximum effective load capacity of the base beam should be not less than 2 times of the characteristics number of the design bearing capacity of single pile with fixing one end of the base beam and simply supporting the other end, the time of loading every level should not be less than 2 hours with achieving a relatively stable settlement, the characteristics number of vertical bearing capacity of single pile should be a half of the ultimate bearing capacity of single pile in vertical compression, and the whole process should achieve the standardization and the sequencing. With all these, the accurate vertical bearing capacity of single pile can be tested.
出处
《铁道工程学报》
EI
北大核心
2009年第8期15-17,30,共4页
Journal of Railway Engineering Society
关键词
铁路工程
基桩检测
技术规程
单桩静载试验
承载力
railway engineering
test of foundation piles
technical rules
load test to single pile
bearing capacity
