重型动力触探N_(63.5)成果对单桩承载力估算探析
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摘要
地基处理规范中仅有N_(63.5)锤击数与中、粗砂容许承载力的关系表,却没有N_(63.5)锤击数与粘性土和细粉砂的容许承载力关系。新疆地区工程地质条件复杂,桩基工程又大都建在需处理的软弱地层上。通过新疆阜康市工业园区供水工程和特克斯山口电站工程两个工程实例,具体论述了N_(63.5)锤击数与粘性土和细粉砂的容许承载力关系,通过比对计算,解决了利用N_(63.5)指标估算单桩承载力的问题。
Foundation treatment specification has the chart of relationship between N_(63.5) hammer number and allowable bearing capacity of middle or coarse sand, without the relationship chart for cohesive soil and fine silt sand. For projects in Xinjiang, the engineering geological conditions are complicated, and pile foundation works mostly fall on soft strata. Taking the Fukang City Industrial Zone Water Supply Project and Shankou Hydropower Project in Tekesi as example, the author demonstrated the relationship between N_(63.5) hammer number and allowable bearing capacity of cohesive soil and fine silt sand, provided solution for estimation of single pile bearing capacity based on N_(63.5) index by comparison calculation.
Foundation treatment specification has the chart of relationship between N_(63.5) hammer number and allowable bearing capacity of middle or coarse sand, without the relationship chart for cohesive soil and fine silt sand. For projects in Xinjiang, the engineering geological conditions are complicated, and pile foundation works mostly fall on soft strata. Taking the Fukang City Industrial Zone Water Supply Project and Shankou Hydropower Project in Tekesi as example, the author demonstrated the relationship between N_(63.5) hammer number and allowable bearing capacity of cohesive soil and fine silt sand, provided solution for estimation of single pile bearing capacity based on N_(63.5) index by comparison calculation.
引文
[1]罗浩.高速铁路载体桩复合地基沉降特性现场试验及施工工艺研究[D].成都:西南交通大学,2010.
[2]张西坤.圆锥动力触探和标准贯入试验钻具配套的分析[J].中国集体经济,2009(21):179-180.
[3]赵海辉,刘小川.重型动力触探仪检测中粗砂地基承载力的探讨[J].公路,2002(9):99-100.
[2]张西坤.圆锥动力触探和标准贯入试验钻具配套的分析[J].中国集体经济,2009(21):179-180.
[3]赵海辉,刘小川.重型动力触探仪检测中粗砂地基承载力的探讨[J].公路,2002(9):99-100.