DL/T 2164-2020 in English
VALIDElastic wire resistance earth pressure meter
- Issued on:2020-10-23
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$262.00
Introduction
Analysis of the core content of the standard
DL/T 2164-2020 specifies the technical requirements for the full life cycle of the differential resistance earth pressure gauge, mainly including:
- Measuring range: pressure 0-3.2MPa, temperature -25~60℃
- Accuracy index: terminal baseline linearity error ≤±2%FS, temperature measurement error ≤±0.5℃
- Environmental adaptability: water pressure resistance 1.2 times the range, insulation resistance＞50MΩ
Product structure and working principle
| Type | Structural features | Applicable scenarios |
|---|---|---|
| Medium type | With pressure transmission tube structure, pressure panel + induction membrane double seal | Measurement of internal pressure stress of soil |
| Interface type | Without pressure transmission tube, induction membrane directly contacts soil | Measurement of interface between structure and soil |
The working principle is based on the change of differential resistance: pressure → displacement of pressure panel → pressure transmission liquid pushes induction membrane → change of resistance ratio of steel wire of sensitive element (R↓/R↑). The circuit adopts three-wire measurement to eliminate the influence of lead resistance.
Comparison of key technical indicators
| Parameter | Required value | Test method |
|---|---|---|
| Minimum reading | ≤0.032MPa/0.01% | Appendix A formula calculation |
| 0℃ free state resistance ratio | Z0≤1.0400 | Ice point tank test |
| Temperature correction coefficient | Deviation≤±0.02% | Three-point temperature calibration |
Key points for implementation of the standard
Installation specifications
The medium type requires compaction of 200mm fine-grained soil around it, and the interface type requires the normal line of the induction membrane to be perpendicular to the interface. When pouring concrete, you should:
- Stop pouring after pre-embedded positioning
- Adjust the pressure gauge to be flush with the structural surface
- Continue pouring after fixing
Maintenance recommendations
Long-term storage must meet the following requirements: temperature -30~70℃, humidity ≤85%, and stay away from corrosive gases. During transportation, the following should be carried out:
- Three-layer packaging (shock-proof foam + waterproof film + wooden box)
- Sweep frequency vibration test with an acceleration of 2g
Technology evolution analysis
This standard was first released in 2020. The main innovations include:
- Added technical requirements for interface earth pressure gauge
- Clarified the test method for temperature correction coefficient (Appendix A.4)
- Strengthen the long-term stability index (error ≤2% after 20 pressure cycles)
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