T/CHES 40-2020 in English
VALIDTechnical code for monitoring canal safety in cold regions
- Issued on:2020-12-16
- Implemented on:-
- File Format:PDF
- Delivery:Via email within 5 business days
$786.00
| Standard No: | T/CHES 40-2020 |
| Document status: | VALID |
| Title in English: | Technical code for monitoring canal safety in cold regions |
| Title in Chinese: | 寒冷地区渠道安全监测技术规程 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-12-16 |
| Chinese Classification: | P55-Water conservancy and water power engineering in general |
| Professional Classification: | T/-Social Organization Standard |
| Related Topics: | area
channel Regulations for inspection and testing of dam safety monitoring instruments cold regions Regional Atmospheric Monitoring safety monitoring cold cold area cold and biting Sluice Safety Monitoring Technology Safety monitoring technology in reservoir areas of hydropower projects Tunnel safety monitoring technology |
为适应渠道工程建设与管理要求，做好寒冷地区渠道安全监测工作，规范安全监测技术内容及方法，制定本规程。
本规程适用于2级及以上渠道的安全监测工作，其他等级渠道的安全监测也可参照执行。
安全监测的对象以衬砌渠道为主，兼顾渠系建(构)筑物。?
安全监测类型包括巡视检查、常规监测以及专项监测。
安全监测类型、项目及内容应在设计阶段、施工阶段、运行阶段根据工程级别、结构类型以及工程所在区域确定。
安全监测结果应及时整编和分析并归档保存。
Introduction
Standard Background and Technology Evolution
This code is formulated to address prominent issues such as frost heave damage and leakage instability faced by canal projects in cold regions in northern my country, and integrates the technical requirements of multiple industry standards such as GB/T 50662 and SL 551. With the development of smart water conservancy, the code adds new clauses for the application of modern technologies such as distributed optical fiber monitoring and automation systems.
Comparison of core monitoring technologies
| Monitoring type | Required items | Instrument requirements | Frequency requirements |
|---|---|---|---|
| Environmental monitoring | Air temperature, channel foundation temperature | Thermistor (±0.1℃) | Once a day in winter |
| Seepage monitoring | Osmotic pressure, seepage volume | Osmometer (0.1%FS) | Twice a week during water outage period |
| Frost heave monitoring | Frost heave deformation and frost heave force | Frost heave displacement meter (1mm) | Once a day during the freeze-thaw period |
Key points for implementing special monitoring
Frost heave process monitoring case
A water delivery channel in Xinjiang uses a layered frost heave meter + moisture content sensor for combined monitoring. Measuring points are set up in the middle of the channel bottom and 1/3 of the slope foot. It is found that the frozen depth and moisture content are significantly positively correlated (R²=0.82), providing data support for the design of the insulation layer.
Winter water delivery monitoring plan
A project in Heilongjiang deploys an ice image recognition system in the curved section. The ice density is calculated in real time through industrial cameras + AI algorithms, and the early warning accuracy rate reaches 92%, effectively preventing the formation of ice dams.
Instrument selection recommendations
- Distributed optical fiber: Raman scattering sensor cable is preferred, with spatial resolution ≤1m
- Frost heave dynamometer: range 0-100kN, low temperature stability ≤0.5%/℃
- Automated acquisition device: MTBF≥6000h, working temperature -30~50℃
Implementation recommendations
- Level I monitoring is mainly based on patrol inspections, with a focus on recording surface defects such as lining cracks and bulges
- In the deep excavation square channel section, additional groundwater level monitoring points should be added, and analysis should be synchronized with seepage monitoring
- In frost heave sensitive areas, it is recommended to use a three-dimensional optical fiber network to achieve temperature-strain joint monitoring
- The monitoring data needs to be analyzed for timeliness and a frost heave rate warning threshold needs to be established
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