中南大学学报（自然科学版）2012，Vol.43Issue(12)：4859-4864,6.
大直径污水井孔壁失稳与泥浆护壁机理
Hole wall instability and mechanism of slurry protection about large diameter bilge well
摘要
Abstract
Using classical theory of soil mechanics, wall instability sliding trajectory equations and slip surface safety coefficient calculation formula on large diameter water well hole were established. The results show that with the increase of gel mud shear strength, hole wall stability is enhanced. For the gravel sand or gravel layer, hole wall stability mainiy depends on the mud slurry severe, and with the increase of severe, the hole wall stability increases. For bedrock, the stability of the hole wall has nothing to do with its depth, but is mainly related to the structure and its surrounding joints or fault plane distribution status. Using gas lift reverse circulation drilling and good slurry wall construction technology can obtain good application effect, and can achieve valuable effect关键词
污水井/孔壁失稳/泥浆护壁Key words
bilge well/ wall instability/ slurry protection分类
建筑与水利引用本文复制引用
王作成..大直径污水井孔壁失稳与泥浆护壁机理[J].中南大学学报（自然科学版）,2012,43(12):4859-4864,6.基金项目
湖南省自然科学基金资助项目(10JJ3007) （10JJ3007）
