东南大学学报（自然科学版）2017，Vol.47Issue(4)：812-817,6.DOI:10.3969/j.issn.1001-0505.2017.04.028
基于CPTU土类指数的标贯值液化判别
Liquefaction assessment using standard penetration test valuebased on CPTU soil behavior type index
摘要
Abstract
In order to increase the accuracy of liquefaction assessment on liquefiable foundation, the liquefiable foundation of the Suqian-Xinyi highway was treated by the resonant compaction method, and piezocone penetration test(CPTU) and standard penetration test(SPT) were carried out on the liquefiable foundation.The soil behavior type index (Ic) obtained from CPTU and the standard penetration test index (N63.5) obtained from SPT are analyzed.The results show that N63.5 of saturated sands and silts is a linear function of Ic (N63.5=-18.8Ic+52.0).The larger the Ic, the smaller the N63.5 will be, and the soil is more close to clay.Based on the fitting relationship between N63.5 and Ic, a new liquefaction discrimination method is established.The liquefaction of saturated sands and silts foundation can be assessed by using N63.5 based on the Code of Seismic Design of Building.N63.5 is expressed by single Ic and Ic is acquired from CPTU.Compared with the SPT assessment method proposed in the code, this method can provide continuous standard penetration test value.Compared with the cyclic resistance ratio method based on cone penetration test, the calculation of the method is very simple.关键词
液化地基/孔压静力触探/标贯值/土类指数Key words
liquefiable foundation/piezocone penetration test (CPTU)/standard penetration test value/soil behavior type index分类
建筑与水利引用本文复制引用
杜广印,罗涛,程远,潘皇宋..基于CPTU土类指数的标贯值液化判别[J].东南大学学报（自然科学版）,2017,47(4):812-817,6.基金项目
国家自然科学基金资助项目(41372308)、中央高校基本科研业务费专项资金资助项目和江苏省普通高校研究生科研创新计划资助项目(SJLX15_0060)、江苏省自然科学基金资助项目(BK20150279). （41372308）
