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新型双管取心钻具及其在软土地层中的应用 预览

Application of New Type Double-tube Core Barrel in Soft Soil Stratum
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摘要 宁波河姆渡一田螺山遗址科学钻探要求采取无扰动原状土样,由于宁波地区特殊的地层岩性,采用传统的厚壁取土器及薄壁取土器均难以达到试验要求。为此,研发了新型双管取心钻具,同时改进泥浆工艺。应用证明提高了岩心采取率,大幅减少对原状土扰动,取得高质量岩土样;新型双管取心钻具,采用PVC内管和单向阀、大出水口钻头和高出刃切削片,具有高效、高性价比和操作性强等优点。 The soil samples are required to be undisturbed in scientific drilling of Hemudu - Tianluoshan site in Ningbo. Due to the special strata lithology in Ninbo area, it is difficult to meet the requirements with the traditional thick-wall and thin-wall soil samplers. In this case, a new type double-tube core barrel is developed, and the mud technology is also improved. The application shows that the core recovery has been improved with high quality soil and rock samples, the disturbance on undisturbed soil are largely decreased. This new type double-tube core drilling tool, with PVC inner tube and one-way valve, large water outlet and proud exposure bit, has advantages of high efficiency, high performance price ratio and good operability.
作者 欧阳涛坚 程春红 OUYANG Tao-jian, CHENG Chun-hong ( Zhejiang Engineering Prospecting Institute, Ningbo Zhejiang 315010, China)
出处 《探矿工程:岩土钻掘工程》 2017年第9期65-67,88共4页 Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词 双管取心钻具 泥浆工艺 原状土 岩心采取率 软土 double-tube core barrel mud technology undisturbed soil core recovery soft soil
作者简介 欧阳涛坚,男,汉族,1970年生,高级工程师,注册岩土工程师,从事岩土工程设计和技术管理工作,浙江省宁波市宝善路206号,284474128@qq.com。
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