Standard for rock and soil classification of railway engineering
定 价：300 元
- 作者：Prepared by: China railway first survey and design institute group Co., Ltd.
- 出版时间：2022/11/1
- ISBN：9787113293697
- 出 版 社：中国铁道出版社
- 中图法分类：U215.2-65
- 页码：28
- 纸张：胶版纸
- 版次：30cm
- 开本：30cm
This Standard is prepared with a view to unifying the technical criteria for rock and soil classification of railway engineering.
This Standard is applicable to the rock and soil classification of railway engineering.
The rock and soil classification shall be conducted by combining field identification with laboratory and field tests， and by combining qualitative classification with quantitative assessment.
Rocks shall be classified according to their hardness， softening property and weathering resistance. The rock shall be designated as special rock when it contains special mineral composition or structure， has special physical， mechanical and chemical properties， and affects the engineering geological conditions.
The rock mass shall be classified or zoned according to the structural type， rock formation thickness， joint development degree， degree of influence of geological structure， integrity， weathering degree and basic quality of rock mass.
Soil shall be classified according to the accumulation age， geological genesis， shape and gradation of soil particles or plasticity index. The soil shall be designated as special soil when it contains special mineral composition or structure， has special physical， mechanical and chemical properties， and affects the engineering geological conditions.
The classification of rock and soil not involved in this Standard may comply with the relevant Chinese standards in force.
Standard for Rock and Soil Classification of Railway Engineering unifies the criteria for rock and soil classification of railway engineering and plays the supporting role as a basic standard.This Standard is prepared based on revisions made to Code for Rock and Soil， Classification of Railway Engineering （TB 10077-2001） ， geotechnical experience of China railway in recent years and relevant Chinese and foreign research achievements.
This Standard consists of 4 chapters， namely General Provisions， Terms and Symbols， Classification of Rock and Rock Mass， and Classification of Soil.
The main revisions are as follows：
1.The basic principles for classification of rock， rock mass and soil are specified.
2.The contents on salinastone， saline rock and basic quality classification of rock mass are added.
3.The classification of rock formation thickness is adjusted.
4.The particle size grouping of soil and classification of gravel are revised.
5.The grading of clay with medium compressibility is refined.
6.The quantitative judgment indexes of compactness of gravel are added.
7.Criteria are added for the vane test and flat dilatometer test of soft soil.
8.The classification of sensitivity of soft soil and the judgment indexes of static cone penetration test for the soft soil are revised.
9.The criteria of saline soil are revised.
10.The seasonally frozen soil and the frost-heaving grading of seasonally thawed soil layer are added.
1 General Provisions
2 Terms and Symbols
2．1 Terms
2．2 Symbols
3 Classification of Rock and Rock Mass
3．1 Classification of Rock
3．2 Classification of Rock Mass
4 Classification of Soil
4．1 General Requirements
4．2 Classification of General Soil
4．3 Classification of Special Soil
Words Used for Different Degrees of Strictness
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