CATCH BASINS CRACKING?
WE CAN FIND OUT WHY!
CATCH BASINS CRACKING?
WE CAN FIND OUT WHY!
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The all too familiar cracking of the asphalt around catch basins can be a constant nuisance. Addressing the source of the cracking instead of just repairing the asphalt pavement around the catch basin will help to maintain a solid structure for years ahead, eliminating the need for regular catch basin repairs..
Catch basins are a very important element in parking lots and are easy to overlook. Catch basins help rid the parking lot of water during a rainfall and snow melt. Getting rid of water as fast as possible is the object of the game. This quick drainage process is imperative in preventing major damage to a parking lot and avoilding serious liability.
Water cannot drain effectively if it encounters impediments such as the side lip of a basin grate. Drainage can be impeded by sunken areas around catch basins, clogged catch basins or improperly graded asphalt.
Catch basins fail for many reasons and most have one common denominator, water. Water is very sneaky, it likes to percolate through anything possible. Here is a few reasons why your catch basins may be failing.
1) PIPE FAILURE
Inlet/outlet pipes inside the catch basin have failed and are allowing water to exit the basin into the soil around the catch basin, consequently softening and eroding it.
2) SEEPAGE
The water is seeping between the grate and the asphalt causing both erosion and heaving once this water freezes. Consquently causing cracking.
3) INCORRECT INSTALLATION
Improper installation of the catch basin. This may mean that the sub-base which the basin itself rests on is inadequatley compacted. Thus allowing the weight of the basin to settle down into the sub-base.
4) OLD STYLE
Older catch basins used brick and morter. These are very susceptible to erosion damage from weather, salt etc. Once the blocks start braking apart, it causes the catch basin to collapse inward. This then causes the sub-base to wash out and fall into the basin essentially taking the asphalt's support with it.
Sometimes these old catch basins need to be completly repaced with new precast concrete catch basins. We then use reinforced modulock rings to support the grate, which are designed to handle the stress of heavy loads and prevent cracking.
CATCH BASIN IN ACTION
Catch basins can encounter enormous amounts of water during rain storms. When they are constructed properly and kept clean inside they will function flawlessly, prevent parking lots from flooding and remain intact for many years.
Sometimes catch basins need to be cut out well beyond the areas that are damaged. This helps to provide room to re-grade the sub base and prepare it for proper slope and drainage.