下载提示
- 1.该资料是网友上传的，本站提供全文预览，预览什么样，下载就什么样。
- 2.下载该文档所得收入归上传者、原创者。
- 3.下载的文档，不会出现我们的网址水印。
文档列表
文档介绍
§ Physical Characteristics and Classification
◆ Soil Formation
◆ Composition and Structure of Soil
◆ Soil Model Expressions----Phase Relationships
◆ Relative density of the granular soils
◆ Consistency of cohesive soils
◆ paction
◆ Classification
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
§ Soil Formation
To the civil engineer, Soil is any uncemented or weakly accumulation of mineral particles formed by the weathering of rocks, the void space between the particles containing water and /or air. Weak cementation can be due to carbonates or oxides precipitated between the particles or due anic matter.
♦ Residual soil
If the products of weathering remain at their original location they constitute a residual soil.
♦ Transported soil
If the products are transported and deposited in a different location they constitute a transported soil, the agents of transportation being gravity, wind, water and glacier.
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
Chemical Process
(Crystalline particles)
Physical Process
(Single Grain)
Weathering
Temperature
Water
Ice/glacier
Wind
Disintegration (freezing/thawing)
Air
Water
CO2
Liquid (acid, oxygen, etc)
§ and Structure of Soil
Particle Size Analysis
♦ Particle sizes vary considerably from those measured in microns (clays) to those measured in meters (boulders)---a difference of one million! Most of natural soils posite soils and the distribution of these sizes gives very useful information about the engineering behavior of the soil.
♦ The distribution is determined by separated the particles using two processes—sieving and sedimentation
Sieving
♦ Sieves separate particles in the range between 75mm and 60μm(gravel and sand) and sedimentation separates particles less than 60μm(silt and clay). Particles greater than 75mm are cobble siz
◆ Soil Formation
◆ Composition and Structure of Soil
◆ Soil Model Expressions----Phase Relationships
◆ Relative density of the granular soils
◆ Consistency of cohesive soils
◆ paction
◆ Classification
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
§ Soil Formation
To the civil engineer, Soil is any uncemented or weakly accumulation of mineral particles formed by the weathering of rocks, the void space between the particles containing water and /or air. Weak cementation can be due to carbonates or oxides precipitated between the particles or due anic matter.
♦ Residual soil
If the products of weathering remain at their original location they constitute a residual soil.
♦ Transported soil
If the products are transported and deposited in a different location they constitute a transported soil, the agents of transportation being gravity, wind, water and glacier.
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
Civil Engineering Department of Shanghai University Soil Mechanics Chapter 1
Chemical Process
(Crystalline particles)
Physical Process
(Single Grain)
Weathering
Temperature
Water
Ice/glacier
Wind
Disintegration (freezing/thawing)
Air
Water
CO2
Liquid (acid, oxygen, etc)
§ and Structure of Soil
Particle Size Analysis
♦ Particle sizes vary considerably from those measured in microns (clays) to those measured in meters (boulders)---a difference of one million! Most of natural soils posite soils and the distribution of these sizes gives very useful information about the engineering behavior of the soil.
♦ The distribution is determined by separated the particles using two processes—sieving and sedimentation
Sieving
♦ Sieves separate particles in the range between 75mm and 60μm(gravel and sand) and sedimentation separates particles less than 60μm(silt and clay). Particles greater than 75mm are cobble siz
建筑地基基础设计规范 来自淘豆网www.taodocs.com转载请标明出处.