红层嵌岩桩承载性状试验研究  

Study on Bearing Behavior of Rock-socket Piles in Laterite

作　　者：侯龙清[1] 徐红梅[1] 罗嗣海[1] 

机构地区：[1]东华理工学院土木与环境工程系,江西抚州344000

出　　处：《工程勘察》2005年第6期13-15,共3页Geotechnical Investigation & Surveying

基　　金：江西省教育厅科技基金资助(2000-83)

摘　　要：通过在红层的人工挖孔嵌岩桩中预埋测试元件,研究了嵌岩段端阻力和侧阻力的发挥与嵌岩比的关系,得出了最佳嵌岩深度和最大嵌岩深度,并从工程实践角度,用试验数据讨论了嵌岩深度的含义。讨论了用桩基规范推荐的公式计算红层中单桩极限承载力标准值的修正系数取值问题,初步给出了较为合理的取值。最后探讨了高应变动测法检测红层嵌岩桩承载力的可靠性,表明高应变动测结果较实际略有偏高。Through the presetting of the testing elements into the rock-socket piles in laterite, the relationship between the resistance of the piles and the ratio of the socket depth to the diameter is studied, and the optimum depth and the maximum depth into rock are obtained. Bsed on testing results the concept of rock-socket depth and the modified coefficient of the bearing capacity of single pile in laterite calculated with the formula in national code are discussed, The reliability for the bearing capacity of pile obtained from the high-strain dynamic method is analyzed, which shows that the results from the said method are higher than the actual value.

关 键 词：端阻力 侧阻力 单桩极限承载力 修正系数 

分 类 号：TU473.1[建筑科学—结构工程]