Dry Dredging - Revision history

Admin at 16:29, 7 December 2012

2012-12-07T16:29:43Z

← Older revision		Revision as of 16:29, 7 December 2012
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	== Preparation ==		== Preparation ==
	[[File:cofferdam.jpg\|thumb\|right\|Cofferdam set up at canal segment in order to drain water]]First a [[Cofferdam]] is set up and the [[Canal]] is drained. These [[Cofferdam\|Cofferdams]] are temporary walls which are erected to seal off a [[Canal Segment]]. Once the [[Cofferdam\|Cofferdams]] are set up the water can be pumped out of the [[Canal Segment]] using water pumps. The work crew must also set up a system of temporary rails and walk ways to allow access to the canal walls and the exportation of collected silt.		[[File:cofferdam.jpg\|thumb\|right\|200px\|Cofferdam set up at canal segment in order to drain water]]First a [[Cofferdam]] is set up and the [[Canal]] is drained. These [[Cofferdam\|Cofferdams]] are temporary walls which are erected to seal off a [[Canal Segment]]. Once the [[Cofferdam\|Cofferdams]] are set up the water can be pumped out of the [[Canal Segment]] using water pumps. The work crew must also set up a system of temporary rails and walk ways to allow access to the canal walls and the exportation of collected silt.

	== Process ==		== Process ==

Admin at 16:28, 7 December 2012

2012-12-07T16:28:50Z

← Older revision		Revision as of 16:28, 7 December 2012
Line 4:		Line 4:

	== Preparation ==		== Preparation ==
	[[File:cofferdam.jpg\|thumb\|Cofferdam set up at canal segment in order to drain water]]First a [[Cofferdam]] is set up and the [[Canal]] is drained. These [[Cofferdam\|Cofferdams]] are temporary walls which are erected to seal off a [[Canal Segment]]. Once the [[Cofferdam\|Cofferdams]] are set up the water can be pumped out of the [[Canal Segment]] using water pumps. The work crew must also set up a system of temporary rails and walk ways to allow access to the canal walls and the exportation of collected silt.		[[File:cofferdam.jpg\|thumb\|right\|Cofferdam set up at canal segment in order to drain water]]First a [[Cofferdam]] is set up and the [[Canal]] is drained. These [[Cofferdam\|Cofferdams]] are temporary walls which are erected to seal off a [[Canal Segment]]. Once the [[Cofferdam\|Cofferdams]] are set up the water can be pumped out of the [[Canal Segment]] using water pumps. The work crew must also set up a system of temporary rails and walk ways to allow access to the canal walls and the exportation of collected silt.

	== Process ==		== Process ==

Lmccarthy at 22:11, 6 December 2012

2012-12-06T22:11:23Z

← Older revision		Revision as of 22:11, 6 December 2012
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	[[Wet Dredging]]		[[Wet Dredging]]
	[[Canal Maintenance]]		[[Canal Maintenance]]

			[[Category:Canal Maintenance]]

Lmccarthy: Created page with " Hopper and hydraulic shovel used to dredge canals Dry dredging is a more costly and time consuming process used to remove..."

2012-12-06T22:06:21Z

Created page with " right|thumb|400 px|Hopper and hydraulic shovel used to dredge canals Dry dredging is a more costly and time consuming process used to remove..."

New page

[[File:hydraulic shovel.jpg|right|thumb|400 px|Hopper and hydraulic shovel used to dredge canals]]
Dry dredging is a more costly and time consuming process used to remove a large amount of dispersed sediment or repair other [[Urban Elements]] such as the canal walls, [[gatoli|Sewers]], [[Bridges]], and sometimes [[Utilities]]. The benefit to dry dredging is the ability to quantify the amount of sediment removed and measure the depth of the canal more accurately. Also as mentioned above an efficient inspection of the [[Canal]], [[Canal Wall]], and [[Sewer]] can be done. The disadvantage to dry dredging is the time consumed by preparing the [[Canal]] for the procedure.<ref>Dredging Methods, http://www.aquamogmidwest.com/Contemporary_Dredging_Metho.html</ref>

== Preparation ==
[[File:cofferdam.jpg|thumb|Cofferdam set up at canal segment in order to drain water]]First a [[Cofferdam]] is set up and the [[Canal]] is drained. These [[Cofferdam|Cofferdams]] are temporary walls which are erected to seal off a [[Canal Segment]]. Once the [[Cofferdam|Cofferdams]] are set up the water can be pumped out of the [[Canal Segment]] using water pumps. The work crew must also set up a system of temporary rails and walk ways to allow access to the canal walls and the exportation of collected silt.

== Process ==
After preparing the [[Canal]] removal of sediment can be performed. The [[Sedimentation|Sludge]] is shoveled into a hopper on some sort of wheeled vehicle by a hydraulic shovel, backhoe or crane.<ref>
Maintaining Venice’s Canals, Venice for Visitors,
http://europeforvisitors.com/venice/articles/maintaining_venices_canals.htm
</ref> More times than not the industrial shovels cannot remove all of the sludge so workers often times finish this step by using hand shovels to remove the remaining rubbish.

== Other Maintenance ==
Often times in a dry dredging process other urban elements that would usually be accessible due to the presence of the water in a [[Canal]] are maintained. For example with the [[Canal]] drained workers are able to inspect the [[Canal Wall]] and determine if any [[Canal Wall Maintenance|Maintenance]] is required. Other elements that can be restored during a dry dredging project are the foundations and undersides of a [[Bridge]], the [[Gatoli]] can be cleaned, and if there are any [[Utility]] lines running along the canal floor (which is rare).

== Clean up ==
After all desired [[Canal Maintenance|Maintenance]] is performed the crew can begin to break down the project. The collected sludge is first [[Sedimentation|disposed]] of. Then all tools and machinery is removed from the [[Canal]] using the system of ramps constructed. Next the temporary ramps and rails can be collected. One last inspection of the [[Canal]] is done to be sure nothing has been left before re flooding the [[Canal]] and breaking down the [[Cofferdam|Cofferdams]].

== References ==
<references/>

== See Also ==
[[Wet Dredging]]
[[Canal Maintenance]]