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内容摘要:花岗岩发育地区球状风化体（俗称“孤石”）的分布直接影响城市轨道交通工程的建设，准确探明花岗岩孤石的空间分布具有重要的现实意义。本文以深圳地区花岗岩球状风化体（孤石）为研究对象，采用区域地质调查、野外试验、室内试验、资料收集和数理统计等方法，对深圳地区孤石的成因、地下分布规律、探测方法、施工处理方法以及三文表达等方面进行了研究。了解到区域构造对孤石的发育起着宏观控制作用，花岗岩孤石的矿物成份、岩体结构特征是差异风化的物质基础，气候和地下水条件是孤石区域分布的重要外部环境条件。得到以下结论:37016
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（1）深圳地区三分之二以上的花岗岩孤石成份为微风化花岗岩，不到三分之一的为中风化花岗岩；
（2）深圳地区花岗岩孤石60%以上分布在强风化花岗岩层中，30%在残积层和全风化层中，中风化层出现很少；
（3）深圳地区花岗岩孤石层项埋深集中在10.00～20.00米范围内，层顶分布高程主要在40.00～70.00米区间内，两者出现频率均接近40%；
（4）深圳地区80%的孤石揭示“厚度”不超过2.50m；
（5）深圳地区三分之二花岗岩孤石主要发育一层，随着发育层数的增多，出现频率锐减。
毕业论文关键词： 深圳地区;花岗岩球状风化体（孤石）;统计规律;三文表达
distribution of the granite boulder underground Analysis in Shenzhen
Abstract: The distribution of the spherical weathered granite body (commonly known as the " boulder ") has a direct impact on the construction of urban rail transit project. The existence of boulder，not only stuck the cutter, wear and tear the tool, devite the driving axi,but also lead to the shield can not drive, delay the construction duration. In this paper, the boulder distributed in Shenzhen are selected as the research object, and the formation mechanism, underground distribution, exploration methods, the construction techniques of shield tunneling and three-dimensional expression of boulder in Shenzhen are stuied using several methods of regionalgeological surveys, field testing, laboratory testing, data collection and statistical analysis. We find that The main cause of boulders are the differences of mineral compositions, regional geologic structure and warm-wet climate. The following aspects are involved:
（1） Shenzhen more than two thirds of the granite boulder ingredients of weathered granite, less than a third of weathered granite;
（2） The granite boulder in Shenzhen for more than 60% are located in weathered granite layer, 30% in eluvial and full regolith, weathered layer occurs rarely;
（3） Shenzhen depth of the granite boulder layer items concentrated in the 10.00 to 20.00 meters, the top layer of elevation distributed mainly in the range of 40.00 - 70.00 m, both the frequency of occurrence are close to 40%;
（4） Shenzhen 80% boulders reveal "thickness" of no more than 2.50m;
（5） Shenzhen area two-thirds the granite boulder major developmental level, with the increase in the number of layers of development, the frequency of dropped.
Keywords: Shenzhen district; Granite globular weathered body（boulder）; Detection; Three-dimensional expression
目 录
1 绪论1
1.1 概述.1
1.1.1 背景.1
1.1.2 意义.2
1.2 国内外研究现状.3
1.2.1 花岗岩孤石成因及地下分布研究.3
1.2.2 孤石对盾构施工影响研究.4
2 花岗岩球状风化体的成因1
2.1 概述.1
2.2 地质构造的控制作用.1
2.3 孤石的岩性特征.3
2.3.1 孤石的结构.3
2.4 气候、地下水条件.3