How To Build A Road Into A Lake In The North Of The Korean Island Of Hongkoon

Transcription

1 3D view of intake - looking upstream from the west bank New intake access track forming upstream bund The intake is located at grid ref , The intake screen arrangement is a drop bar type screen with 10mm spacing and set at a 10 deg down angle. This type of intake has been selected for it's low profile which reduces upstream flood level and is very robust. The design flow capacity is 1050 l/s. The compensation flow is to be divided between the fixed notch in the weir and a small chamber flushing flow which is discharged approx. 35m down-stream of the intake. The road access is an integral part of the intake design, forming an upstream bund to contain moderate flood flows 3D view of intake - looking upstream from west bank rdessie HEP INTK Flush sluice with access steps Sluice gate controls (all handles will be removable and stowed) Compensation flow notch Dimensions pending SEP discussion Intake screen 10mm spacing, 10 deg down angle

2 3D view of intake - looking upstream from the east bank Stone-clad wall around the sump chamber The intake is located at grid ref , The intake screen arrangement is a drop bar type screen with 10mm spacing and set at a 10 deg down angle. The design flow capacity is 1050 l/s. The compensation flow is to be divided between the fixed notch in the weir and a small chamber flushing flow which is discharged approx. 35m down-stream of the intake. There are various isolation sluice gates built into the sump chamber and all handles shall be removable to lessen visual impact. The road access is an integral part of the intake design, forming an upstream bund to contain moderate flood flows 3D view of intake - looking upstream from the east bank rdessie HEP INTK Banks protected with large natural boulders as required

3 3D view of intake - looking downstream from the east bank Pipe/pedestrian bridge in distance Intake flush outlet approx 35m downstream Safe working access The intake is located at grid ref , The intake screen arrangement is a drop bar type screen with 10mm spacing and set at a 10 deg down angle. The design flow capacity is 1050 l/s. The compensation flow is to be divided between the fixed notch in the weir and a small chamber flushing flow which is discharged approx. 35m down-stream of the intake. There are various isolation sluice gates built into the sump chamber and all handles shall be removable to lessen visual impact. The road access is an integral part of the intake design, forming an upstream bund to contain moderate flood flows 3D view of intake - looking downstream from the east bank rdessie HEP INTK - 003

4 3D view of intake - looking downstream from the west bank The intake is located at grid ref , The intake screen arrangement is a drop bar type screen with 10mm spacing and set at a 10 deg down angle. The design flow capacity is 1050 l/s. The compensation flow is to be divided between the fixed notch in the weir and a small chamber flushing flow which is discharged approx. 35m down-stream of the intake. There are various isolation sluice gates built into the sump chamber and all handles shall be removable to lessen visual impact. The road access is an integral part of the intake design, forming an upstream bund to contain moderate flood flows 3D view of intake - looking downstream from the west bank rdessie HEP INTK ccess track forming upstream bund

5 3D view of intake - distant view from VP1 from the east bank Flush outlet Pipe/pedestrian bridge Intake 3D view of intake from VP1 rdessie HEP INTK - 005

6 3D view of intake - distant view from VP2 from the east bank Flush outlet 3D view of intake from VP2 rdessie HEP INTK - 006

7 3D view of intake - distant view from VP3 from the east bank 3D view of intake from VP3 rdessie HEP INTK - 007

8 3D view of intake access track - distant view from west bank Track 'cut' section The access track is required to the intake for both construction and longer term maintenance. ccess is formed by a cut/fill track down the steep river bank. This section of the banking is out of the flood flows. The flat section of track running to the intake then forms a river bund design to contain moderate flood flows. Very high flows will overtop the east bank of the intake but the ground will be protected with rip rap and geo-textile to ensure it can survive the occasional over-topping 3D view of track to the intake from the west bank rdessie HEP INTK ccess track forming bund to contain moderate flood flows Track 'fill' section

9 3D view of intake access track - distant view from east bank Cut section Fill section The access track is required to the intake for both construction and longer term maintenance. ccess is formed by a cut/fill track down the steep river bank. This section of the banking is out of the flood flows. The flat section of track running to the intake then forms a river bund design to contain moderate flood flows. Very high flows will overtop the east bank of the intake but the ground will be protected with rip rap and geo-textile to ensure it can survive the occasional over-topping 3D view of track to the intake from the east bank rdessie HEP INTK - 009

10 Plan view of intake and access track - (scale 1:1000 on 4) 0m 10m 20m 30m 40m 50m VP3 VP2 VP3 The access track is required to the intake for both construction and longer term maintenance. ccess is formed by a cut/fill track down the steep river bank. This section of the banking is out of the flood flows. The flat section of track running to the intake then forms a river bund design to contain moderate flood flows. Very high flows will overtop the east bank of the intake but the ground will be protected with rip rap and geo-textile to ensure it can survive the occasional over-topping Plan location view rdessie HEP INTK : m NORTH

11 Plan view of intake - (scale 1:100 on 4) 0m 1m 2m 3m 4m 5m 1.20 m C 6.31 m B 4.00 m Due to the ground conditions the intake slab will be based on a large mass fill concrete structure. The full extent of the foundation structure will be determined by the site engineer once river excavations have taken place. It is important to note that the large foundation structure will not be visible m 9.26 m Plan view 1.50 m 9.90 m 1.00 m rdessie HEP INTK : m C B NORTH

12 Front elevation of intake - (scale 1:100 on 4) 0m 1m 2m 3m 4m 5m NOTES Due to the very high bed load of sediment expected, the sump chamber has been designed with a sediment trap. This has both a large diameter flush pipe for occasional heavy flushes and also a smaller diameter flush pipe so as not to require frequent heavy flushing as this may impact on the Scottish Water inlet downstream off the intake. The small flush pipe will form part of the compensation flow m 1.00 m 0.30 m 1.65 m Front elevation rdessie HEP INTK :100 Pipe to turbine Flush pipe Secondary compensation flow pipe to downstream outlet

13 Section view - of intake - (scale 1:100 on 4) 0m 1m 2m 3m 4m 5m 7.96 m 4.30 m 1.20 m 4.00 m 2.99 m 1.49 m m Section view - rdessie HEP INTK :100

14 Section view B-B of intake - (scale 1:100 on 4) 0m 1m 2m 3m 4m 5m m Section view C-C of intake - (scale 1:100 on 4) m Section views - and B-B 1.99 m 2.49 m 2.99 m rdessie HEP INTK :100

15 NOTES Plan view of the flush outlet - (scale 1:100 on 4) 1.30 m 1.70 m 3.00 m 0m 1m 2m 3m 4m 5m NORTH Due to the very high bed load of sediment expected, the sump chamber has been designed with a sediment trap. This has both a large diameter flush pipe for occasional heavy flushes and also a smaller diameter flush pipe so as not to require frequent heavy flushing as this may impact on the Scottish Water inlet downstream off the intake. The small flush pipe will form part of the compensation flow. 3D view of the flush outlet Intake flush outlet rdessie HEP INTK :100