DL/T 947-2023
Earth-rock dam monitoring instrument series spectrum (English Version)
- Standard No.
- DL/T 947-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- Professional Standard - Energy and Power Planning CN / NDGJ
- Latest
- DL/T 947-2023
- Replace
- DL/T 947-2005
- Introduction
Background of Standard Revision and Technological Evolution
This revision (DL/T ××××-××××) is a comprehensive upgrade of the 2005 version of the standard, mainly reflecting three major technological breakthroughs: the introduction of fiber optic sensing technology, the application of micro-electromechanical technology, and the integration of GNSS positioning system. The standard deletes 4 types of outdated technical instruments and adds 12 types of new monitoring equipment, reflecting the leapfrog development of earth-rock dam monitoring technology in the past 15 years.
Analysis of Instrument Classification System
Monitoring Category Instrument Types in 2005 Edition New Instruments in 2023 Edition Technological Breakthrough Deformation Monitoring 6 Categories 5 Categories, including Beam-type Settlement Meters and GNSS Equipment Millimeter-level Accuracy Improved Seepage Monitoring 3 Categories 2 Categories, including Piezometer Water Level Gauge Series Dynamic Response Speed Improved by 40%
Core instrument technical parameters
Fiber Bragg Grating Instruments
Typical parameters of the newly added Fiber Bragg Grating Piezometer: measurement range 0~200kPa, resolution 0.02%FS, suitable for long-term monitoring of 200-meter-high dams. In a 300MW hydropower station application, it can achieve 72-hour early warning of abnormal seepage.
Implementation Suggestions
- Optical fiber and micro-mechanical electronic instruments should be used preferentially for new projects
- Compatibility verification of measurement principles is required for renovation projects
- Data acquisition devices should support multi-protocol hybrid networking
DL/T 947-2023 history
- 2023 DL/T 947-2023 Earth-rock dam monitoring instrument series spectrum
- 2005 DL/T 947-2005 The series and type spectrum of monitoring instrument for earth-rockfill dams
