摘要：深圳位于我国华南地区，其50%的地域覆盖着不同风化程度的花岗岩，其中以微风化和中风化为主。深圳地区气候湿热，化学风化作用为主要的风化作用。花岗岩风化会带来结构强度降低，物理、力学性质发生变化等诸多问题，对工程施工带来很大的影响。80547

本文的研究对象为深圳地铁1、2、5、11号线沿线岩体，通过收集地铁沿线的风化岩石和新鲜岩石的各项物理、力学性质参数并进行系统整理，采用同一线路上的风化岩石和新鲜岩石的横向对比、同一线路上风化岩石内部间的纵向对比对比、不同线路上风化岩石的见的横向对比的研究方式。通过绘图软件绘出物理力学性质中可能存在的关系曲线，得出大致的相关性，来对深圳地区的花岗岩球状风化体经行系统的物理、力学性质分析。

本文研究发现不同岩性的花岗岩在风化过程中所展现的物理、力学性质是不同的。风化作用对岩体的总空隙率、吸水率有着很大的影响。但是同一沿线的不同区域风化岩在密度这一大类的物理性质参数上表现相近。岩体饱和抗压强度与饱和抗拉强度、吸水率、含水率均有一定的线性关系。

毕业论文关键词：风化花岗岩；岩性；深圳地铁；物理性质；力学性质

Analysis of Physical and Mechanical Properties of Granite Spherical Weathering Body in Shenzhen Area

Abstract: Shenzhen is located in the south China of China, with 50% of the area covered with different degrees of weathering granite, which is mainly micro-weathering and weathering。 Shenzhen climate hot and humid, chemical weathering as the main weathering effect。 Granite weathering will bring structural strength reduction, physical and mechanical properties change and many other issues, the construction has a great impact。

This paper is based on the physical and mechanical properties of weathered rock and fresh rock along the MTR, and the weathering parameters of the same route are adopted。 And the horizontal comparison of fresh rocks, the vertical contrast between the interior of the weathered rocks on the same line, and the horizontal comparison of the weathering rocks on different lines。 Through the drawing software, the paper analyzes the possible relationship between the physical and mechanical properties of the granite ball body weathered system in Shenzhen area by drawing the approximate correlation between the physical and mechanical properties。

In this paper, we found that the lithology of different lithologies showed different physical and mechanical properties in the weathering process。 The weathering effect has a great influence on the total porosity and water absorption of the rock mass。 But the same area along the different areas of weathered rocks in the density of the physical properties of this category on the performance of similar。 The compressive strength of the rock mass has a linear relationship with the saturated tensile strength, water absorption and water content。

Key words: weathered granite, lithology, shenzhen metro, physical properties, mechanical properties

目 录

1  绪论 1

1。1  课题的目的与意义 1

1。2  国内外研究现状 1

1。3  发展趋势 2

2  孤石对工程的危害 3

2。1  球状风化花岗岩边坡地质灾害 3

2。1。1  滚石与落石病害 3

2。1。2  崩塌滑坡病害 4

2。2  球状风化花岗岩隧道地质病害