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如何提高大口径水文水井钻探的工程质量黑龙江省桩基础工程公司张久国（１）切实抓好冲孔换浆工作。一定要依照地质技术要求严格认真地作好冲孔换浆工作，尤其在使用泥浆钻进，工期又比较长的井中，可考虑用偏心刮壁器或钢丝刷子刮去孔壁上的泥皮。（２）科学地选用滤水管...
How to improve the engineering quality of large-diameter hydrological well drilling Heilongjiang Province pile foundation engineering company Zhang Jiguo (1) earnestly punching slurry change work. Must be strictly in accordance with the geological and technical requirements for well drilling and slurry replacement work, especially in the use of drilling mud, the construction period is relatively long well, you can consider eccentric scraping wall or wire brush to scrape the hole wall mud. (2) The selection of a scientific filter ...