Construction lessons
Project judgments and procurement conclusions
The filling site protective coating is not a single layer, but is made up of the ground, low-lying soil layer or GCL, HDPE main protective coating, protective layer and liquid-liquid conductive layer. Any upper layer that is not approved for coverage will permanently close the tipstone, water content abnormalities, connecting fault and drainage blind areas. Construction should use a clay separation transfer, concealed receipt, roll number and clay traceability CQA process.
Construction lessons
Steps to landing
- Dividing the construction unitsThe area of the welding and testing area is the area of the welding and testing area.
- The transfers are in writing.The first layer of the signature can be opened up to the next layer.
- Finished CQATesting, non-destructive testing, destruction of sampling and repair of the closed loop.
- Controlled paving and directing wasteLow-grade material, maintaining the required thickness protection.
Construction lessons
Key parameters and quick judgement tables
| Levels | Main features | Check before transfer |
|---|---|---|
| Ground/pressure of solid soil | Stability and secondary barriers | Pressure intensity, water content, flatness |
| GCL (as designed) | Low-grade coating | It's a water-based, damaged connection. |
| HDPE geomembrane | Main barrier | The number of volumes, the number of volumes, the defect graph |
| Protecting the layer of the fabric + conductors | Anti-puncture and excretion | The water is very dry, the pipes are sloping, the filling is clean. |
Construction lessons
Acceptance points and common risks
- GCL early hydrationRainfall or water accumulation can affect the quality of the padding and seam.
- Pollution of the Protected LayerThe use of stone or building waste directly increases the risk of penetration.
- The map of the location is perfectThe area has been repaired and the records have been reviewed.