| 曹艳玲,吴波,王峰,王树星,范振华,霍延虎.石英岩高陡边坡植物根系环境重塑研究——以长岛石英岩为例[J].矿产勘查,2020,11(10):2324-2329 |
| 石英岩高陡边坡植物根系环境重塑研究——以长岛石英岩为例 |
| Root environment remodeling of high and steep quartzite slope:A case study on Changdao quartzite |
| 投稿时间：2019-08-04 |
| DOI： |
| 中文关键词: 高陡边坡 石英岩 崖壁凿孔 孔距 复绿 |
| 英文关键词: high and steep slope,quartzite, drilling holes in cliff wall,hole spacing, virescence |
| 基金项目: |
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| 中文摘要: |
| 高陡岩质边坡一直是生态修复的难题,尤其在干旱少雨地区,本身含水性低的高陡石英岩,复绿难度更大。为提高干旱少雨地区高陡石英岩边坡复绿效果,该文提出在崖壁大孔径凿孔,重塑植物根系环境,来提高复绿效果的方法,并通过钻孔岩石应力的理论研究以及实践验证得出了适合该岩质边坡的适宜孔距。具体是将常用的150 mm崖壁凿孔孔径扩大到300 mm,并对孔外缘之间的最小距离进行了计算,以此来合理设计凿孔工程量。根据计算结果在长岛地区按照孔外缘距离30 cm、60 cm和90 cm分别进行试验,通过半年的验证,得到了和计算结果吻合的效果。另外,本文独创性地将裂纹尖端的曲率半径引入到计算钻孔间细微径向裂隙长度中,并用实际工程进行了验证。通过验证,该计算是合理的。该高陡边坡崖壁凿孔方法的推广必将对干旱少雨地区复绿提供了新的思路和借鉴。 |
| 英文摘要: |
| High steep rock slope has always been a difficult problem in ecological restoration, especially in arid and rainless areas, the high steep quartzite with low water content is more difficult to green. In order to improve the greening effect of high and steep quartzite slope in arid and rainless areas, we put forward a method to improve the greening effect by drilling holes with large diameter on the cliff and remolding the plant root environment. Through the theoretical research and practical verification of the rock stress in the borehole, the appropriate hole spacing is obtained for the rock slope. Specifically, the hole diameter of the commonly used 150 mm cliff wall drilling is expanded to 300 mm, and the minimum distance between the outer edges of the hole is calculated, so as to reasonably design the drilling quantity. According to the calculation results, experiments were carried out in Changdao area according to the distance between the outer edge of the hole of 30cm, 60cm and 90cm respectively. After half a year’s verification, the results were consistent with the calculation results. In addition, the curvature radius of crack tip is introduced into the calculation of micro radial crack length between boreholes, which is verified by practical engineering. The calculation is reasonable. The popularization of this drilling method will provide a new idea and experience for greening in arid and rainless areas. |
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