| 风化花岗岩崩岗灾害的成因机理 |
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| 引用本文： | 王彦华,谢先德,王春云.风化花岗岩崩岗灾害的成因机理[J].山地学报,2000,18(6):496-501. |
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| 作者姓名： | 王彦华 谢先德 王春云 |
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| 作者单位： | 中国科学院广州地球化学研究所，广东广州，510640 |
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| 基金项目： | 广东省“九五”重大项目“沿海地表地质灾害的矿物动力学机制研究”(编号：973106)。 |
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| 摘 要： | 测定了广东珠海大镜山剖面(DJS)、增城剖面(ZC-1、ZC-2)、阳江飞鹅岭和圆周岭剖面(FEI、YZL)的物性指标，通过建立崩岗数学模型，设定不同的坡面参数条件，计算了坡面和稳定临界深度，当坡度＜43°时，坡体的稳定临界深度＞2m。根据雨水在花岗岩风化剖面的渗透特点，计算了一定强度的降雨在不同时间内的湿润前锋，由临界深度与湿润前锋的对比，说明了降雨与崩岗的关系。此外，还结合文献中日本和香港地区崩岗灾害的统计资料结果，探讨了不同时间的降雨对坡体稳定性的影响。
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| 关 键 词： | 花岗岩 风化 崩岗 机理 成因 移动速度 降雨 |
| 文章编号： | 1008-2786(2000)06-0496-06 |
| 修稿时间： | 1999年8月11日 |
FORMATION MECHANISM OF CALAMITIES DUE TO BENGGANG PROCESSES OF WEATIIERED GRANITIC ROCKS |
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| WANG Yan-hua,XIE Xian-De,WANG Chun-yun.FORMATION MECHANISM OF CALAMITIES DUE TO BENGGANG PROCESSES OF WEATIIERED GRANITIC ROCKS[J].Journal of Mountain Research,2000,18(6):496-501. |
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| Authors: | WANG Yan-hua XIE Xian-De WANG Chun-yun |
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| Abstract: | Indices of physical properties for the profiles of weathered granitic rocks in Dajingshan of Zhuhai (DJS), Zengcheng (ZC-1, ZC-2), Feieling (FEL) and Yuanzhouling (YZL) of Yangjiang, Guangdong were measured in this project. The stable critical depth of each slope was calculated through construction of the mathematical model for the benggang process and assumption of different parameters for the slope conditions. Results indicate that when the slope is less than 43°, the stable critical depth of a slope's greater than 2m. The damp front within different permeability characteristics of rainfalls into the profile of weathered granitic rocks. Results of comparisons of the critical depth to the damp front influence of precipitation within different periods on slope' s stability was also explored in reference to the statistical results of the calamities due to benggang processes in Japan and in Hong Kong. |
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| Keywords: | Granitic rock weathering benggang mechanism |
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