花岗岩风化程度与微地形的关系及其风化深度的统计分析
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摘要
花岗岩风化程度与其所处微地形的相关性及各风化层深度的统计特征研究尚为欠缺。本文通过118个钻孔样本的统计分析,研究了丘陵区内花岗岩风化程度与地形条件的关系及区内风化层深度的统计规律。结果显示,花岗岩全风化、强风化层深度与地形有一定的相关性;花岗岩残积土、全风化层和强风化层深度的频率统计均具有较好的负指数分布特征。统计分析结果加深了对该地貌环境下花岗岩风化程度的认识,并为岩土工程勘察勘探深度预判及岩土工程设计提供较为可靠的参考依据。
The correlation between the weathering degree of granite and the micro-topography and the statistical characteristics of weathering depth are still insufficient. Based on the statistical analysis of 118 borehole samples, the relationship between the weathering degree of granite and the terrain condition and the statistical law of weathering layers depth in hilly area are studied. The statistical results show that the completely and heavily weathered depth have some relationship with the terrain condition. The granite residual soil, the completely and heavily weathered depths show the well negative exponential distribution. The statistical results provide the reference for strengthening the understanding of the weathering degree of granite in this terrain condition and the anticipation of the exploration depth in the geotechnical engineering design.
The correlation between the weathering degree of granite and the micro-topography and the statistical characteristics of weathering depth are still insufficient. Based on the statistical analysis of 118 borehole samples, the relationship between the weathering degree of granite and the terrain condition and the statistical law of weathering layers depth in hilly area are studied. The statistical results show that the completely and heavily weathered depth have some relationship with the terrain condition. The granite residual soil, the completely and heavily weathered depths show the well negative exponential distribution. The statistical results provide the reference for strengthening the understanding of the weathering degree of granite in this terrain condition and the anticipation of the exploration depth in the geotechnical engineering design.
引文
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[8] 孙亚丽,何万通,方建平等.不同环境下凝灰岩石板的相对风化速度研究[J].工程勘察,2015,43(2):1～7.Sun Yali,He Wangtong,Fang Jianping et al.Study on the weathering rate of tuff under different environments [J].Geotechnical Investigation & Surveying,2015,43(2):1～7.(in Chinese)
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[2] 刘祖富.拟建福厦高速铁路全风化花岗岩物理力学性质研究[J].铁道工程学报,2007,(增刊1):14～17.Liu Zufu.Study on physical-mechanical properties of all-weathered granite for Fuzhou-Xiamen high-speed railway to be built[J].Journal of Railway Engineering Society,2007,(S1):14～17.(in Chinese)
[3] 王清,唐大雄,张庆云等.中国东部花岗岩残积土物质成分和结构特征的研究[J].长春地质学院学报,1991,21(1):73～81.Wang Qing,Tang Daxiong,Zhang Qingyun et al.A study on the structure and composition of granite residual soil in the eastern China[J].Journal of Changchun University of Earth Science,1991,21(1):73～81.(in Chinese)
[4] 张征,刘淑春,邹正盛等.岩土参数的变异性及其评价方法[J].土木工程学报,1995,28(6):43～51.Zhang Zheng,Liu Shuchun,Zou Zhengsheng et al.The variability and evaluation of parameters of rock and soil[J].China Civil Engineering Journal,1995,28(6):43～51.(in Chinese)
[5] 冯涛,吴光,赵志明等.韶花铁路花岗岩球状分布规律统计分析[J].水文地质工程地质,2006,(6):94～96.Fen Tao,Wu Guang,Zhao Zhiming et al.Statistic analyses of the occurrence of subsurface weathered-granite spheres in Shaoguan-Huadu section of the Wuhan-Guangzhou express railway[J].Hydrogeology & Engineering Geology,2006,(6):94～96.(in Chinese)
[6] 尚彦军,王思敬,岳中琦等.全风化花岗岩物理化学特征数值统计及指标相关性分析[J].矿物岩石地球化学通报,2004,23(2):93～99.Shan Yanjun,Wang Sijing,Yue Zhongqi et al.Statistical analysis of characteristic physicochemical parameters and correlations of indices with respect to completely decomposed granite[J].Bulletin of Mineralogy,Petrology and Geochemistry,2004,23(2):93～99.(in Chinese)
[7] 潘天有,胡宝群.花岗岩风化物物理力学指标的概率统计分析[J].人民长江,2004,35(12):40～41.Pan Tianyou,Hu Baoqun.Statistical analysis of the physical and mechanical index of the weathered granite[J].Yangtze River,2004,35(12):40～41.(in Chinese)
[8] 孙亚丽,何万通,方建平等.不同环境下凝灰岩石板的相对风化速度研究[J].工程勘察,2015,43(2):1～7.Sun Yali,He Wangtong,Fang Jianping et al.Study on the weathering rate of tuff under different environments [J].Geotechnical Investigation & Surveying,2015,43(2):1～7.(in Chinese)
[9] 中华人民共和国国家标准.岩土工程勘察规范(GB 50021-2001)[S].北京:中国建筑工业出版社,2001.The State Standards of the People′s Repbulic of China.Code for investigation of geotechnical engineering (GB 50021-2001)[S].Beijing:China Architecture and Building Press,2001.(in Chinese)