摘要
以2003年新疆巴楚—伽师地区Ms6.8级地震大规模砂土液化为背景,通过对地震液化场地的详细勘察,获取了39个场地的静力触探勘察数据,根据现有国内外静力触探液化判别方法均不适合于新疆巴楚地区的情况,依据实测数据建立了含锥尖阻力基准值、地下水位、砂层埋深、地震烈度等常规参数的液化判别新公式。建立的液化判别方法分为初判和复判两部分,初判条件以特征深度表示;复判公式对液化场地和非液化场地的回判别成功率均在95%左右,可靠度较高。提出的公式形式与中国工程上最常用的液化判别公式一致,可为新疆地区液化判别及相关地区性规范制订提供技术支持。
In 2003,a large-scale liquefied phenomenon occurred in Bachu-Jiashi region of Xinjiang due to an earthquake of Ms6.8,39 in-situ CPT data are collected from the liquefied liquefied sites.Since the existing CPT-based prediction methods for soil liquefaction are not applicable to Bachu region of Xinjiang,a new evaluation formula is proposed based on the measured data of cone tip resistance value,ground water level,sand burial depth and intensity.The evaluation method is divided into the initial evaluation and the next evaluation.The evaluation success ratio is 95% in liquefied sites and is 94% in non-liquefied sites.The results show that the model has high reliability.The form of the proposed formula is in accordance with that of the most commonly-used liquefaction formula in China.The new formula may provide technical support for prediction of soil liquefaction in Xinjiang and relate areas.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S1期140-145,共6页
Chinese Journal of Geotechnical Engineering
基金
中国地震局工程力学研究所基本科研业务费专项(2013B10)
国家自然科学基金项目(41272357
51278472)
关键词
新疆地区
静力触探测试
砂土液化
判别方法
Xinjiang
cone penetration test
soil liquefaction
prediction method
