沙石颗粒群沉降实验研究
摘要:在立井回填过程中,出现了回填高度不稳定、悬吊管受力变化幅度大等异常现象。分析认为:沙石回填沉降行为是影响回填高度不稳定、悬吊管受力变化幅度大的主要因素。利用模拟井筒进行沙石颗粒群沉降实验表明,细颗粒的存在,使井筒中出现明显软夹层,该层强度相对较低、含液量高,一般悬浮在井筒中,是影响回填高度不稳定的主要原因。
Abstract:During the process of sand and stone backfilling, such abnormal phenomena like instable backfilling height, large extent of the simulated casing stress, which directly affect the safety of project. By preliminary analysis, the behavior of sand and stone when backfilling is the major factor that leads to instable backfilling height and large extent of the simulated casing stress. Using simulated shaft for sand and stone deposition experiments, the results show that the fine particle is one of the prime reasons leading to instable backfilling height. and the strain of the simulated casing increased abruptly to one time greater than before in the process of the "abrupt deposition".
中文标题：
沙石颗粒群沉降实验研究
Deposition Test Research on Sand and Stone in Simulated Shaft
作者：
刘新良,尹晓利,李艳霞
Liu Xinliang,Yin Xiaoli,Li Yanxia
作者简介:刘新良,1971年,女,汉族,湖南岳阳人,西北核技术研究所工程师,机械设计专业,本科,从事钻井工程技术研究,liuxl1971@126.com。
通讯地址：
西北核技术研究所, 陕西西安 710065
NorthwestInstituteofNuclearTechnology,Xi'an710065,Shanxi,China
中图分类号:TU991.12
doi:10.3969/j.issn.1007-2993.2011.04.012
出版物：岩土工程技术
收稿日期:2011-06-29
关键词:沙石,实验研究,悬吊管
Key words:sand and stone,experiment research,simulated casing
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