利比亚Sidi Alsaeh砂土地基沉降计算方法浅析  

Study on calculation method of sand foundation settlement in Sidi Alsaeh, Libya

作　　者：闫建 张武 张波 YAN Jian;ZHANG Wu;ZHANG Bo(State Key Laboratory of Building Safety and Built Environment,Beijing 100013,China;China Academy of Building Research Foundation Institute,Beijing 100013,China;Beijing Engineering Technology Research Center of Foundation and City Underground Space Development and Utilization,Beijing 100013,China)

机构地区：[1]建筑安全与环境国家重点实验室,北京100013 [2]中国建筑科学研究院有限公司地基基础研究所,北京100013 [3]北京市地基基础与地下空间开发利用工程技术研究中心,北京100013

出　　处：《建筑结构》2022年第S01期2411-2415,共5页Building Structure

摘　　要：砂土地基的沉降原则上可依据压缩模量采用分层总和法计算,由于不易取得有代表性的原状砂样,国内一般不采用土工试验方法确定砂土的压缩模量,而是利用原位试验结果和地方经验提供参考值。利比亚Sidi Alsaeh砂土地基的压缩模量没有供参考的经验数据,通过平板载荷试验和标准贯入试验建立用应力水平指标来确定的变形模量,根据变形模量进行分层总和法计算,并将计算沉降曲线与平板载荷试验实测沉降曲线进行对比,试验结果表明:利比亚Sidi Alsaeh砂土地基沉降计算所需的变形模量参数由标准贯入试验确定是可行的,对于强夯处理前、处理后挖方和填方区不同密实状态的砂土地基,根据标准贯入试验锤击数N值的不同,选用不同的经验公式进行计算,从而为利比亚Sidi Alsaeh地区砂土地基沉降计算提供了参考。In principle,the settlement of sandy soil foundation can be calculated by the layered sum method according to the compressive modulus.Because it is difficult to obtain a representative undisturbed sand sample,the compressive modulus of sandy soil is generally not determined by the geotechnical test method in China,but the in-situ method is used.Test results and local experience provide reference values.There is no empirical data for the compressive modulus of the Sidi Alsaeh sandy soil foundation in Libya.The deformation modulus determined by the stress level index was established through the flat plate load test and the standard penetration test,and the layered sum method was calculated according to the deformation modulus.Comparing the calculated settlement curve with the measured settlement curve of the plate load test,the test results show that the deformation modulus parameters required for the settlement calculation of the sandy soil in Libya Sidi Alsaeh are feasible to be determined by the standard penetration test.For the sand foundations with different compaction states in the excavation and filling areas before and after the dynamic compaction treatment,according to the different N values of the standard penetration test hammering number,different empirical formulas are used for calculation.This provides a reference for the calculation of sand foundation settlement in the Sidi Alsaeh area of Libya.

关 键 词：地基 砂土地基 标准贯入试验 平板载荷试验 沉降 

分 类 号：TU433[建筑科学—岩土工程]