Statistical Analyses of the Subsurface Occurrence of Globular Weathered Body of Granite in Shenzhen
详细信息
- 责任者：Cao Quan (Faculty of Engineering ; China University of Geosciences ; Wuhan 430074 ; China) ; Xiang Wei
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2013
- 卷期：40(5)
- 关键词：花岗岩 ; granite ; 风化岩土 ; weathered materials ; 广东 ; Guangdong
- 页码：p.87-90,96
- 图表：6 illus., 12 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
Globular weathered body of granite( commonly known as "solitary stone") is widely distributed in the Shenzhen district,which has the adverse impact on underground construction. Using the current basic theoretical research on the distribution of solitary stone,the spatial distribution of the solitary stones can not bequantitatively determined. It is particularly important to establish the statistical discipline of regional solitary stone distribution. Based on large samples of granite solitary stones in the Shenzhen district,statistical conclusions are drawn as the follows. The main ingredients of granite solitary stones in the Shenzhen district is weathered granite. More than 60% of the solitary stones are located in a strong weathered granite layer,and others are located in a completely weathered granite layer and a residual soil layer. The elevation of the upper level of solitary stones is concentrated within the range of 40. 00 to 70. 00 meters( Yellow Sea elevation). The vertical thickness of 80% of the solitary stone does not exceed 2. 50 m,which is revealed by bores. Two-thirds of the granite solitary stones are developed in one layer. With the increase of the number of layers,the frequency of occurrence declines sharply.
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