YS/T 5225-2016 in English
VALIDSpecification for soil test
- Issued on:2016-04-05
- Implemented on:2016-09-01
- File Format:PDF
- Delivery:Via email within 10 business days
$3,929.00
| Standard No: | YS/T 5225-2016 |
| Document status: | VALID |
| Title in English: | Specification for soil test |
| Title in Chinese: | 土工试验规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 10 business days |
| Issued on: | 2016-04-05 |
| Implemented on: | 2016-09-01 |
| Superseding: |
YSJ 225-1992 Test methods for soils
|
| Professional Classification: | YS-Non-ferrous Metal |
| Related Keywords: | soil test introduction background
test methods chapter thermal conductivity test core test methods new test technology |
| Related Topics: | Geotechnical test
astm test procedure Geotechnical Test Procedures Geotechnical test Civil Engineering Test Equipment Geotechnical Test Procedures Civil Engineering Test Equipment astm geotechnical test ys/t+1145-2016 Reference to geotechnical testing specifications |
本标准主要内容包括：土样接收保管制备饱和、特殊试样的预处理、含水率试验、密度试验、比重试验、颗粒分析试验、界限含水率试验、导热系数试验、比热容试验、渗透试验、分散性试验、固结试验、直接剪切试验、反复直剪强度试验、三轴压缩试验、三轴基床系
本标准适用范围：为了测定土的基本工程性质，统一有色冶金工业建设土工试验方法，提高行业技术水平，保证试验质量，并为建筑工程勘察、设计、施工提供可靠的计算参数和判定指标，制订本规程。本标准适用于有色冶金工业建设工程的土工试验。
Introduction
Background and framework of standard revision
This regulation is a comprehensive upgrade of the 1993 Ministry of Metallurgy standard, with new chapters corresponding to modern testing equipment such as thermal conductivity tester and triaxial bed coefficient tester. The main technological evolutions include:
| Technical dimensions | 1993 edition | 2016 edition | Update range |
|---|---|---|---|
| Types of test methods | Chapter 40 | Chapter 47 | +17.5% |
| Instrument requirements | Traditional mechanical | DigitalAutomatic acquisition system | Comprehensive upgrade |
| Special soil treatment | Category 3 | Category 5(including saline soil) | +66.7% |
Analysis of core test methods
1. Key points of new test technology
The thermal conductivity test adopts the surface heat source method and the transient hot wire method, which is suitable for soil thermal property testing in ground source heat pump projects, and requires a temperature control accuracy of ±0.5℃.
2. Comparison of improved test methods
Consolidation testAdded the process of determining the rebound modulus:
- Maintain the preload for 24 hours
- Unload step by step to the initial pressure
- Record the reading of the displacement sensor
Implementation suggestions and precautions
1. Special soil sample treatment
For saline soil samples, salt washing pretreatment is required:
- When the Cl- content is greater than 0.3%, rinse with distilled water
- When the SO42- content is high, vacuum filtration is required
2. Instrument calibration requirements
All dynamometers should be calibrated according to Appendix H, with non-linear error ≤1%FS. It is recommended to calibrate once every 3 months.
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