人民长江2024，Vol.55Issue(7)：167-173,7.DOI:10.16232/j.cnki.1001-4179.2024.07.022
水平定向钻穿越水敏性地层冒浆预测及防控
Prediction and prevention of mud-bursting during horizontal directional drilling through water-sensitive strata
摘要
Abstract
In the construction of non-excavation horizontal directional drilling,the high pressure in the hole can cause surface uplift and slurry accident,seriously polluting the surrounding environment,and causing major economic losses.Taking the horizon-tal directional drilling crossing project of water supply pipeline in Tangban Water Diversion Project in Fuzhou City as an example,considering that the project is located in water-sensitive softening slurry formation,a targeted calculation model of maximum al-lowable mud pressure in the hole was constructed based on Mohr-Coulomb criterion,and the correctness of the model was veri-fied by field displacement monitoring data.Then,the reliability of slurry prevention and control technology for non-excavation horizontal directional drilling through water-sensitive weak expansive strata was verified by field application.The results showed that the constructed calculation model in this paper was more suitable for water-sensitive softening slurry formation than other ex-isting prediction models.The mud-bursting prevention should focus on the control of mud pressure in the hole,while combining with mud preparing technology and process optimization to prevent pressure suppressing,and finally supplemented by local weak points strengthening,directional control on slurry and other means,so as to ensure construction safety.关键词
非开挖施工/水平定向钻/水敏性地层/冒浆Key words
non-excavation construction/horizontal directional drilling/water-sensitive formation/mud-bursting分类
建筑与水利引用本文复制引用
郑华..水平定向钻穿越水敏性地层冒浆预测及防控[J].人民长江,2024,55(7):167-173,7.基金项目
国家自然科学基金项目(42002284) （42002284）
