Helong
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Particulars
Owner: unknown
Designer: Yanbian Investigation and Design Institute of Hydropower
Contractor: Helong Construction Bureau
Statistics
Type: Gravity
Purpose(s): Hydropower / Recreation / Water Supply
Reservoir capacity: 30 m3x106
Height: 30 metres
Length: 244 metres
Volume of RCC: 43 m3x103
Total volume: 89 m3x103
Construction Dates
Start of Project: 11/98 (November 1998)
Start of RCC: 08/99 (August 1999)
End of RCC: 01/02 (January 2002)
End of Project: 12/02 (December 2002)
Facings
Upstream
| Slope | Type |
|---|---|
| Vertical | Traditional concrete against formwork |
Downstream
| Slope | Type |
|---|---|
| 0.75 | RCC against precast concrete blocks |
Spillway
| Slope | Type |
|---|---|
| ogee | RCC against precast concrete blocks [stepped face] |
Placement
| Layers (mm) | Lifts (mm) |
|---|---|
| 300 | 2000 |
Cementitious material
| Cement (kg/m3) |
|---|
| 113 |
| Pozzolan (kg/m3) | Pozzolan Type |
|---|---|
| 113 | Low-lime flyash (ASTM Class F) |