基于原位试验的土壤崩解特性研究——以黄口堰水库扩建工程均质土坝填筑为例  

Study on soil disintegration characteristics based on in-situ test:taking homogeneous earth dam filling of Huangkouyan Reservoir Expansion Project as an example

作　　者：魏亚飞 李九斤 王名俊 WEI Yafei;LI Jiujin;WANG Mingjun(Chenzhou Hydropower Construction Co.,Chenzhou 423000,China)

机构地区：[1]郴州市水电建设公司,湖南郴州423000

出　　处：《水利建设与管理》2021年第5期22-27,共6页Water Conservancy Construction and Management

摘　　要：均质土坝的填筑土样具有遇水崩解的特性,在南方湿热多雨的气候条件下,极易发生崩解破坏,故其崩解特性及控制机理成为实际工程建设中关注的热点问题之一。本文以黄口堰水库扩建工程均质土坝填筑为例,开展了不同松铺厚度、不同压实遍数条件下基于原位试验的土壤崩解特性试验。结果表明:不同松铺厚度、不同机械压实遍数对试验土样的崩解特性有显著的影响;试验土样崩解速度由慢到快再到慢,土壤崩解主要发生在试验前3min,土样崩解量的80%在此时间段完成。The filling soil samples of homogeneous earth dams have the characteristic of disintegration in water.Disintegration damage occurs easily under the humid,hot and rainy climate conditions in South China.The disintegrating characteristics and control mechanism of homogeneous earth dams have become one of the hot issues concerned in practical project construction.The filling of homogeneous earth dams in Huangkouyan Reservoir Expansion Project is adopted as an example for soil disintegration characteristic tests based on in-situ tests under different loose paving thicknesses and different mechanical compaction times.The results show that the disintegration characteristics of the test soil samples are significantly affected by the different loose paving thicknesses and the different mechanical compaction times.The disintegration rate of the test soil samples is changed from slow to fast and then to slow.The soil disintegration mainly occurs in the first 3 minutes of the test,and 80%of the soil sample disintegration volume is completed within the period.

关 键 词：均质坝 土壤 崩解 松铺厚度 压实遍数 

分 类 号：TV443.1[水利工程—水工结构工程]