The most widespread type of masonry work is the erection of solid brick masonry using individual bricks set in mortar. âLight masonry,â consisting of two parallel face walls each one-half a brick thick and filled with a light concrete, loose slag, or another insulating material, is sometimes used.
A sinkhole, also known as a cenote, sink, sink-hole, shakehole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.
Causes of Sinkholes Around Drainage Structures. The most common cause of sinkholes around stormwater drains is leaks in the structure. Usually the leaks develop over time as a result of deterioration of the materials used to seal the joints between pipes coming in and out of the structure and the structure itself. This is usually called parging. Some other causes of leaks in the drain structures that cause sinkholes is settlement of the adjacent soils. If the ground the drain was built on sinks, it can cause the drain structure to shift. This shifting can cause joints to break and cracks to form.