Manholes are underground structures that provide access to cables, pipes, wires, and sewers. They are essential for maintenance and repair work on these utilities.
Manholes serve as openings into underground chambers containing utility lines, ensuring safe access for workers. They are crucial for maintaining our safety and the city’s utility systems.
Manholes are mostly made of concrete, but there are different types depending on their purpose and size. Here’s an overview:
| Type | Description |
|---|---|
| Round | Common, small, easy to handle. |
| Cast Iron/Ductile Iron | Machine-cast, standard or special types. |
| Dry Pipes/Wet Pipes | Dry pipes separate from underground water, wet pipes in contact with it. |
| Different Shapes | Can be round, oval, square, or polygonal. |
Manholes come in various types based on depth:
Shallow Manhole
Normal Manhole
Deep Manhole
Different manhole types serve different purposes:
Sanitary Sewer Manhole : Entry/exit for a sanitary sewer.
Storm Sewer Manhole : Entry/exit for a storm sewer, designed to prevent contamination.
Utility Manhole : For locating utility lines like gas, water, cable TV, and more for maintenance.
The construction of a manhole depends on its type and load-bearing capacity. It must be waterproofed to prevent water seepage:
Manholes can be made from various materials based on usage, location, and cost:
Proper manhole maintenance is essential to prevent issues like flooding and contamination. There are two main aspects:
Manhole Cover
Cleaning
In summary, manholes are vital for maintaining utility systems, come in various types, and require proper construction and maintenance to ensure safety and functionality.
