引江济淮枞阳引水口软土地基变形分析  

Deformation Analysis of Soft Soil Foundation of Zongyang Water Diversion Outlet From Yangtze River to Huaihe River

作　　者：李国梁 LI Guoliang(China Energy Engineering Group Anhui Electric Power Design Institute Co.,Ltd.,Hefei 230601,China)

机构地区：[1]中国能源建设集团安徽省电力设计院有限公司,安徽合肥230601

出　　处：《电力勘测设计》2023年第S02期85-92,共8页Electric Power Survey & Design

摘　　要：为研究枞阳引水口项目厚层软土地基的次固结变形及稳定性问题,选用取自枞阳县的软土原状样进行分级加荷的固结试验,并对试验结果进行分析,得到软土次固结变形的规律,采用对比监测数据与改进公式计算的方法验证公式的合理性。结果表明:次固结系数随荷载先增大后减小最后基本稳定,在前期固结压力附近达到最大值,次固结系数与压缩指数呈线性关系,引江济淮枞阳引水口区域两者比例系数范围在0.031 89~0.041 43,次固结系数随时间对数呈类双曲线型衰减;根据次固结系数随时间对数的衰减规律改进的软土次固结变形的经验公式合理。In order to study the secondary consolidation deformation and stability of thick soft soil foundation of Zongyang headrace project,this paper selects the undisturbed soft soil samples from Zongyang County to carry out the consolidation test of graded loading and,analyzes the test results,obtains some laws of secondary consolidation deformation of soft soil,and verifies the rationality of the formula by comparing the monitoring data and improving the formula calculation method.The results show that the secondary consolidation coefficient first increases and then decreases with the load,and finally basically stable.It reaches the maximum near the pre consolidation pressure.The secondary consolidation coefficient has a linear relationship with the compression index.The ratio coefficient of the two in the area of water diversion from the Yangtze River to the Huaihe River and Zongyang river is in the range of 0.03189~0.04143,and the secondary consolidation coefficient decays like hyperbola with the logarithm of time;According to the attenuation law of secondary consolidation coefficient with time logarithm,the improved empirical formula of secondary consolidation deformation of soft soil is reasonable.

关 键 词：引江济淮 软土 固结试验 次固结 公式改进 

分 类 号：P642[天文地球—工程地质学]