sinkholes-from-below

Preventing Sinkholes: Avoiding Costly Repairs

Infrastructure

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Examining the causes of sinkholes and how Deep Trekker is aiding in preventing costly repairs and unwarranted closures.


When it comes to preventing sinkholes, we must first understand how and why they appear. Armed with this knowledge, we can then take proper action to thwart the sudden appearances of these, costly craters.

Sinkholes slowly develop over time in and around areas where limestone or other structurally weak stones lay below the surface. Water gradually dissolves some of this subterranean stone and creates a cavity beneath the surface. The overbearing stress and weight above the void causes the ground strata to then collapse inward and results in a sudden depression which we refer to as a “sinkhole”.

 

Costly Repairs

In the United States, Florida experiences some of the highest rates of damage from sinkholes. Nearly $300 million per year is required to repair and deal with the consequences of sinkholes. Filling a hole and restoring utilities, roads and the landscape can also take weeks or in larger instances, even months.

 

Urban Sinkholes

preventing-sinkhole-costly-repair

By Oregon Department of Transportation (Harbor sinkhole) [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0)], via Wikimedia Commons

It is often difficult to predict where sinkholes may develop. However, in some instances, areas of high risk due to deteriorating underground utility systems can be identified. Sinkholes in urban areas are often caused by aging sewer pipes and compromised water mains. Water leaks from corroded, fractured or old pipes erode the strata around it and form an unstable void. In addition, activities on the surface such as construction or heavy traffic reduce the integrity of pipes. When a large section of pipe does collapse, the wall structure may pull large volumes of the surrounding soil down with it.

 

 

Preventing Sudden Sinkholes

Municipal utilities often work in junction with road construction crews to unearth areas known to have aging pipes and replace these mains before they become an issue. Digging up crumbling infrastructure on a long street can cost millions of dollars. However, preventative replacement costs less than encountering the sudden costs of ruptured mains.

Proactively replacing structurally failing infrastructure shouldn’t be a guessing game. Guessing which pipes may need attention is a risky proposition. Millions of dollars can be misdirected to one street but two blocks over, a water main bursts and causes excess spending and unwarranted closures.

 

The Deep Trekker Solution

Conducting inspections of the pipes before digging aids in a judicious allocation of funds available to replace buried and aged infrastructure. Cities and towns of any size can get eyes in their pipes using the fully submersible Deep Trekker DT340 Pipe Crawler.

dt340-pipe-crawler-portable-submersible

The completely portable system is powered by onboard batteries which last up to 8 hours on a 1.5-hour charge. Consequently, there are no topside generators to lug around in a large truck. A Deep Trekker pipe crawler has the ability to be deployed literally anywhere. An operator has the ability to inspect the internal structure of the pipes with the pan, tilt, and zoom camera. The live video feed is analyzed on the spot from the lightweight, handheld controller or stored on a DVR or other storage device.

Deep Trekker’s DT340 Pipe Crawler allows municipal utilities to conduct on-going, routine and affordable inspections of their concealed infrastructure before having to dig.

Submerged Piped

In the case where a pipe is submerged in a body of water, the Deep Trekker DTG2 Remotely Operated Vehicle (ROV) is the ideal inspection tool. Commonly known as an underwater drone, the ROV is built with the same portability as the DT340 Pipe Crawler. The fully submersible ROV can be equipped with a Cutter, 2 Function Grabber and a laser scaler to aid in assessing a maintenance or repair job. 

 drone-underwater-pipe-inspection underwater-drone-municipal-inspection

To proactively prevent sinkholes in your area, contact us today.

 

The Lighter Side of Sinkholes

  1. Some sinkholes are completely harmless. In Mexico, “cenotes” are naturally forming sinkholes resulting from the collapse of limestone bedrock that exposes groundwater underneath.
  2. Located outside of Cairo, Egypt, the Qattara is the largest natural sinkhole in the world measuring 80 km long by 120 km wide.
  3. Some sinkholes are swimmable; such as Florida’s Devil’s Toilet Bowl.

 

References:

http://abc7news.com/weather/gov-jerry-brown-declares-state-of-emergency-across-california/1717692/

https://www2.usgs.gov/faq/categories/11602/7921

https://water.usgs.gov/edu/sinkholes.html

http://cottagelife.com/environment/7-things-you-might-not-know-about-sinkholes

http://wbsm.com/new-bedford-crews-replacing-aged-pipes-along-coggeshall-street/

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