| 浅谈大峡水电站大坝原型观测外部观测系统中倒垂孔施工 |
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| 引用本文： | 王钦军.浅谈大峡水电站大坝原型观测外部观测系统中倒垂孔施工[J].电网与水力发电进展,1997(4). |
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| 作者姓名： | 王钦军 |
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| 作者单位： | 水电三局基础公司!甘肃白银，730912 |
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| 摘 要： | 大型水电站大坝原型观测中倒垂孔的钻进施工，由于钻孔深度大，钻孔垂直度要求严格，是水库蓄水阶段验收前必须竣工并完成初始值测定的项目；又由于施工条件的制约大多工程均在竣工前才有条件施工，因而工期短、精度要求高，施工难度极大。结合大峡水电站工程的施工，较好地解决了“精度”与“进度”的关系。
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| 关 键 词： | 倒垂孔钻进 偏斜原因 纠偏措施 |
On Construction of Upside Down Vertical Hole in External Observation of Prototype Monitoring System for Dam of Daxia Hydropower Station |
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| Authors: | Wang Qinjun |
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| Abstract: | The upside down vertical hole of prototype monitoring system for dam was deep with high accuracy requirement. Based on the local geological condition, the parameters of drilling were reasonably selected, which made the effective diameter of the hole larger than designed figure and meet the time limit of construction. |
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| Keywords: | Drilling of upside down vertical hole Reasons of skews Measures for skews modification |
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