Groot River Bridge - Revision history

Sakowski at 23:54, 9 February 2022

2022-02-09T23:54:41Z

Sakowski at 23:51, 9 February 2022

2022-02-09T23:51:29Z

Sakowski at 04:26, 13 August 2019

2019-08-13T04:26:27Z

Sakowski at 07:56, 25 December 2018

2018-12-25T07:56:40Z

Sakowski at 07:55, 25 December 2018

2018-12-25T07:55:53Z

Sakowski at 04:41, 9 December 2009

2009-12-09T04:41:40Z

Sakowski at 06:17, 17 October 2009

2009-10-17T06:17:54Z

Sakowski at 05:59, 17 October 2009

2009-10-17T05:59:53Z

Sakowski at 05:56, 17 October 2009

2009-10-17T05:56:13Z

Sakowski at 05:53, 17 October 2009

2009-10-17T05:53:43Z

@@ Line 42: / Line 42: @@
 [[File:BloukransLocationMap.jpg|750px|center]]
-[[File:BloukransLocationMapWide.jpg|750px|center]]
+[[File:BloukransLocationMapWide.jpg|900px|center]]
 [[Category:Bridges in South Africa]]

← Older revision		Revision as of 23:51, 9 February 2022
Line 37:		Line 37:
	An view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers. Both spans are nearly equal in height.		An view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers. Both spans are nearly equal in height.

		+
		+	[[File:BloukransSatelliteWidest.jpg\|750px\|center]]
		+
		+
		+	[[File:BloukransLocationMap.jpg\|750px\|center]]
		+
		+
		+	[[File:BloukransLocationMapWide.jpg\|750px\|center]]

	[[Category:Bridges in South Africa]]		[[Category:Bridges in South Africa]]

@@ Line 22: / Line 22: @@
 <div style="text-align: center; font-size: 25px;">
-[[File:GrootElevFinal.jpg|750px|center]]<br />
+[[File:GrootElevFinal.jpg|900px|center]]<br />
 Groot River Bridge Elevation<br />
 </div>

← Older revision		Revision as of 07:56, 25 December 2018
Line 7:		Line 7:
	[[File:GrootBridgeByeasterncaperockclimbing.jpg\|750px\|center]]		[[File:GrootBridgeByeasterncaperockclimbing.jpg\|750px\|center]]
	</div>		</div>
		+	Image by easterncaperockclimbing.

@@ Line 5: / Line 5: @@
 foot span / 189 meter span<br />
 <br />
-[[File:1GrootRiverAerial.jpg|630px|center]]
+[[File:GrootBridgeByeasterncaperockclimbing.jpg|750px|center]]
 </div>
@@ Line 24: / Line 24: @@
 Groot River Bridge Elevation<br />
 </div>
 [[File:2GrootsBobbAerial.jpg|750px|center]]
-An aerial view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers.  Both spans are nearly equal in height.
+An view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers.  Both spans are nearly equal in height.
 [[Category:Bridges in South Africa]]

@@ Line 27: / Line 27: @@
 [[File:2GrootsBobbAerial.jpg|1000px|center]]
-An aerial view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers.  Both spans are 565 feet (172 meters) high.
+An aerial view of the 2 arch bridge crossings over the Bobbejaans and Groot Rivers.  Both spans are nearly equal in height.
 [[Category:Bridges in South Africa]]

← Older revision		Revision as of 05:53, 17 October 2009
Line 17:		Line 17:
	From an engineering viewpoint, the most interesting of these 5 high arch bridges may well be the Paul Sauer bridge across the Storms River on the border between East Cape and West Cape, South Africa. Completed in 1956, the Ricardo Morandi designed bridge was built 15 years prior to Van Stadens and 28 years before the 3 Bloukrans-area arches came along in 1984. Storms River is unusual for having inclined spandrel supports that radiate out from the main arch rib. The approach supports are also inclined in the opposite direction - balancing out the profile of the entire bridge. The use of inclined supports is a Morandi trait visible on nearly all of his bridges.		From an engineering viewpoint, the most interesting of these 5 high arch bridges may well be the Paul Sauer bridge across the Storms River on the border between East Cape and West Cape, South Africa. Completed in 1956, the Ricardo Morandi designed bridge was built 15 years prior to Van Stadens and 28 years before the 3 Bloukrans-area arches came along in 1984. Storms River is unusual for having inclined spandrel supports that radiate out from the main arch rib. The approach supports are also inclined in the opposite direction - balancing out the profile of the entire bridge. The use of inclined supports is a Morandi trait visible on nearly all of his bridges.

−	Not so evident is the unique construction method by which Morandi built the bridge. Instead of using a highline and adding segments of the arch until the two halves meet in the center, Morandi had both sides of the arch built vertically above the foundations with a climbing formwork on either side of the canyon. The two sides were then carefully tilted outward over the gorge until they could rest on each other at the crown. There are several concrete arch bridges in China that have recently been constructed this way. If you have the time, there is also a hike down to a small suspension footbridge across the mouth of the Storms ~~river~~.	+	Not so evident is the unique construction method by which Morandi built the bridge. Instead of using a highline and adding segments of the arch until the two halves meet in the center, Morandi had both sides of the arch built vertically above the foundations with a climbing formwork on either side of the canyon. The two sides were then carefully tilted outward over the gorge until they could rest on each other at the crown. There are several concrete arch bridges in China that have recently been constructed this way. If you have the time, there is also a hike down to a small suspension footbridge across the mouth of the Storms River.