| 复杂地层方形抗滑桩旋挖成孔工艺及工程应用 |
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| 引用本文： | 张敏,周灵,谭超,廖黎韦,陈中伟,侯志勇.复杂地层方形抗滑桩旋挖成孔工艺及工程应用[J].中国地质灾害与防治学报,2023,34(1):85-93. |
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| 作者姓名： | 张敏 周灵 谭超 廖黎韦 陈中伟 侯志勇 |
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| 作者单位： | 四川省地质工程勘察院集团有限公司，四川 成都 610072 |
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| 基金项目： | 中石油管道有限责任公司科学研究与技术开发项目“山区油气管道线路设计与工程防护关键技术研究”（2020B-3106-0501） |
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| 摘 要： | 为提高方形抗滑桩开挖成孔效率，研究适用于复杂条件岩质滑坡抗滑桩快速成孔的工艺，以成都东部某大型岩质滑坡101根大截面抗滑桩为对象，通过现场调查、理论分析及工程试验等方法，研究了方形抗滑桩工程成孔工艺、施工特征和不同地层成孔工艺适用体系。研究表明，研制的“旋挖钻孔+人工辅助清边”成孔工艺作业效率大大提高，在该抗滑桩工程中实施达到日平均进尺2.0 m高效率，顺利达到工期要求，进而解决了岩石成孔效率慢、工艺落后的问题；根据滑坡所处条件选择合适的施工工艺对抢险救灾工程至关重要，对于交通条件好、工期要求高的大型滑坡治理工程，优先考虑“旋挖钻孔+人工辅助清边”工艺；对于交通条件差、作业受限的小型滑坡治理工程，采用风镐开挖土体、水磨钻开挖岩石成孔工艺。
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| 关 键 词： | 方形抗滑桩 成孔工艺 旋挖引孔 人工清边 水磨钻 |
| 收稿时间： | 2021-09-26 |
Techniques of rotary hole-drilling for square anti-slide piles in complex formation and its application |
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| Affiliation: | Sichuan Institute of Geological Engineering Investigation Group Co.Ltd., Chengdu, Sichuan 610072, China |
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| Abstract: | To improve the hole-forming efficiency of square anti-slide pile excavation and study the rapid hole-forming technology suitable for rock landslides under complex conditions, this paper aims to study the hole-forming technology, the construction characteristics and the applicable system of hole-forming technology in different strata of square anti-slide piles by means of field investigation, theoretical analysis and engineering test.In this paper, a large rock landslide treatment project in eastern Chengdu with 101 large-section anti-slide piles is takens as the research object. The research shows that the new hole-forming technology of “rotary hole-drilling + manual excavation of the remaining earthwork” has greatly improved work efficiency and achieved a high efficiency of 2.0 m daily average footage in the anti-slide pile project. In the project, the new technology has successfully met the requirements of the construction period and solved the problem of slow hole-forming efficiency and backward technology. It is very important for disaster relief projects to choose the appropriate construction technology according to the conditions of landslides. For large-scale landslide treatment projects with good traffic conditions and high construction period requirements, the technology of “rotary hole-drilling + manual excavation of the remaining earthwork” is preferred. For small landslide treatment projects with poor traffic conditions and limited operation methods, we can use pneumatic picks to excavate the soil and use watermill drills to excavate the rock. |
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