| 人工冻土钻眼爆破法 |
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| 引用本文： | 马芹永.人工冻土钻眼爆破法[J].冰川冻土,1997,19(3):263-267. |
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| 作者姓名： | 马芹永 |
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| 作者单位： | 淮南矿业学院土木工程系 |
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| 摘 要： | 冻结法是通过厚表土井筒施工的有效方法“冻实”和强化冻结是深厚粘土层冻结值得推荐的方案。实践证明，钻眼爆破法能够加快掘进速度，在保证冻结管安全条件下提高钻眼爆破效率，必须合理选择钻眼设备，优化冻土爆破参数，实现全断面一次爆破。
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| 关 键 词： | 人工冻土 爆破参数 冻结管 冻土 井筒 钻眼 |
Researches on Preventing Frost Heaving of Box- Separated Gate and Their Application |
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| Zhu Yujun,Wang Tiegang and Wang Shirong.Researches on Preventing Frost Heaving of Box- Separated Gate and Their Application[J].Journal of Glaciology and Geocryology,1997,19(3):263-267. |
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| Authors: | Zhu Yujun Wang Tiegang and Wang Shirong |
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| Abstract: | The traditional hydro-engineering gate containing bedding, gate body, step slope and power consumption et al . with a length of more than 60 m is usually suffered frost damage in cold regions. A new type of box-separated gate was designed and set up in 1985 with a discharge of 120 m 3/s, and spreaded widely in Northeast, Northwest and North China with a great deal of benefit for preventing frost damage. The performances of the gate are as follows: 1) The main body of the gate designed as bar shaped one, with a length of less than 20% of traditional one which might be affected by frost heaving; 2) All of the foundations is located at the same level covered by enough depth of water which is efficient for preventing frost penentration to their bottom and consquentely the normal frost heaving force under the foundation will surely reduce; 3) The sides of the box were set up as slopes which eliminate the tangential frost heaving force; 4) Box separated gate is affected by symmetrical horizontal frost heaving force which keeps the gate stabilized. The experience shows that the gate can be used in not only cold regions but also non-frost areas, saving a large amount of work and cost. |
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| Keywords: | box-separated gate preventing frost heaving |
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