| 康定机场地基土特征及其形成机制 |
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| 引用本文： | 黄润秋,徐则民,许强,赵建军,吴礼舟.康定机场地基土特征及其形成机制[J].工程地质学报(英文版),2005,13(1):1-11. |
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| 作者姓名： | 黄润秋 徐则民 许强 赵建军 吴礼舟 |
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| 作者单位： | 1.成都理工大学工程地质研究所,成都610059; |
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| 基金项目： | 国家自然科学基金;云南省自然科学基金;国家自然科学基金 |
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| 摘 要： | 拟建的康定机场位于青藏高原东缘、北西向展部的折多山的南西麓,控制标高4232.5m,是仅次于西藏邦达的世界 第二高机场。折多山由一花岗岩基组成,两侧被宽4～5km的巨型第四系坡积裙包围,康定机场位于其南西侧坡积裙上。坡 积裙的岩屑主要是通过崩滑脱离山体的,其演化趋势是完全覆盖折多山。除块石土、碎石土、角砾土及砂土外,地基土中还存 在一种由粒径30～100cm、次圆～次棱角状、表面粗糙的块石组成的特殊块石土,它在平面上有石窝、石窝群、石河及 石海等分布形式,垂向分布深度小于2m,其显著的自沉降现象对跑道稳定具有重要影响。特殊块石土是演化到一定程度 的坡积物经潜蚀作用形成的。四类正常土体及特殊块石土均属良好地基,潜蚀是导致其工程特性劣化及沉降的主要因素,地 基排水是今后工程施工的重点。
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| 关 键 词： | 康定机场 青藏高原 花岗岩岩基 坡积裙 地基土 特殊块石土 潜蚀 |
| 文章编号： | 1004-9665/2005/13(01)-0001-11 |
| 收稿时间： | 2004-07-08 |
CHARACTERISTICS OF THE FOUNDATION SOIL AT KANGDING AIRPORT AND ITS GENESIS |
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| HUANG Runqiu,XU Zemin,XU Qiang,ZHAO Jianjun,WU Lizhou.CHARACTERISTICS OF THE FOUNDATION SOIL AT KANGDING AIRPORT AND ITS GENESIS[J].Journal of Engineering Geology,2005,13(1):1-11. |
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| Authors: | HUANG Runqiu XU Zemin XU Qiang ZHAO Jianjun WU Lizhou |
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| Institution: | 1.Engineering Geology Institute, Chengdu University of Technology, Chengdu 610059;2.Department of Civil Engineering| Kunming University of Science and Technology, Kunming 650224 |
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| Abstract: | Kangding airport, to be constructed at an elevation of 4232.5 m above sea level, is located on the south-west foot of Zheduo mountain stretching from south-east to north-west on eastern Tibetan Plateau. It will be the second highest airport in the world after Bangda airport (4,400 m) located on Tibet. The Zheduo mountain consists of a granite batholith surrounded by a vast quaternary bajada with a width of 4 to 5 kilometers. The airport is situated on the south-western part of the bajada. The rock debris was transported to the base of the range by landslides and rock falls tend to fully cover the Zheduo granite base rock. Besides boulders, gravels and sands, special boulders with diameters of 30 to 100 cm without the other fine grains exist under the foundation of the airport. Those boulders have a rough surface in either sub-rounded or sub-angular shapes. They are buried within 2 meters of depth and spread in forms of 'stone nests', 'stone rivers' and 'stone seas'. The special boulder is a product of a long evolutionary process, in which the colluvial deposits were removed by underground erosion. In general, the boulders, gravels, sands and special boulders are good foundation materials. Nonetheless, underground erosion causes settlement and deterioration of engineering properties. The apparent free falling of these special boulders poses potential threats to the stability of the airport foundation. Therefore, drainage is a key component in construction of the foundation to assure its stability. |
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| Keywords: | Kangding airport Tibetan Plateau Granite batholith Bajada Foundation soil Special boulders Underground erosion |
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