饱和粉土含水量及孔隙比TDR原位测试研究  

In situ water content and void ratio measurement of saturated silt by TDR technique

作　　者：陈赟[1] 梁志刚[2] 周群建[3] 陈云敏[1] 

机构地区：[1]浙江大学软弱土与环境土工教育部重点实验室,杭州310058 [2]杭州市建筑设计研究院有限公司,杭州310001 [3]浙江大学建筑设计研究院,杭州310027

出　　处：《工程勘察》2011年第1期29-33,45,共6页Geotechnical Investigation & Surveying

摘　　要：为克服岩土工程勘察中饱和粉土的取样和送样过程中产生的震动及水分损失对其原始含水量及孔隙比的影响,通过建立土体介电常数与孔隙比及含水量的关系,采用TDR测试方法,实现对不同深度饱和粉土的含水量及孔隙比的原位测试。经与室内土工试验结果相比较,表明TDR方法测试结果可靠,且测试速度快、对土层扰动小,是一种值得推广的原位测试手段。In geotechnical investigation,the original water content and void ratio of saturated silt are influenced by vibration and water loss during the process of sampling and transportation.The relationship between soil dielectric constant and its water content and void ratio has been established.In situ water content and void ratio measurements of saturated silt in different depth are implemented by TDR technique.Compared with laboratory soil test,the test results of TDR are accurate and reliable.These results indicate that TDR is a fast,little destructive and viable instrument to measure the in situ water content and void ratio of saturated silt.

关 键 词：TDR 含水量 孔隙比 原位测试 

分 类 号：TU413[建筑科学—岩土工程]