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Purpose Installing Manhole Structure And Types

Purpose Installing Manhole Structure And Types

A manhole is defined as an access point used by workers to remove blockages in the sewer line. It is a very important part of the sewer line. Thus, when there is a problem in the sewer lines, the process of digging them is completely eliminated and it is also known as an inspection room or unit. Now a system is being implemented to clear the blockages in the sewage line by passing garbage disposal equipment through this manhole.

One can see such manholes in many places in the houses where all the waste water pipes are connected. Purpose of Manhole The main purpose of manhole construction is rehabilitation of sewer system, drainage system inspection, blockage cleaning and maintenance. It is also the initial step to enter the sewer line inside and find the problem. It helps to replace the damaged pipe in the sewer line without digging work. Manholes are placed at regular intervals along the sewer line up to the end of the main sewer line or drainage point. Generally, a manhole consists of a vertical circular chamber of different sizes and depths used to reach the inspection point. Manhole covers are available in different sizes, materials and rectangular, circular and square shapes.Installing Manhole Structure

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Types of manholes

1. Shallow Manhole: A shallow manhole is constructed at the beginning of a branch sewer line and is 75 to 90 cm deep in low traffic areas.

2. Deep Man Hole: A deep man hole is constructed above 150 cm with a heavy cover on its upper surface. Also, the depth of the man hole is increased as the facility of descent is increased.

3.Normal Man Hole: A normal manhole is square in shape with a heavy cover on the surface and is 150 cm deep.

Parts Of Manhole Access Shaft Working Room Base And Sidewall Bottom Or Invert Ladder Or Steps Cover And Law Materials Used For Manhole Construction

1.Plastic Manhole – Plastic manholes are made using polyethylene material. It is eco-friendly, sustainable and does not affect the soil or ground it is placed on. The main advantage of using plastic manholes is that there is no need to talk about their frequent maintenance and repair.

2. Pre-cast concrete manhole – These are the manholes which are made by a traditional method. These manufactured in another place are very easy to bring and install at the required place. These can be called popular manholes as they can last for many years. 3.Fiberglass Manhole – Fiberglass manhole has additional features like grinder channel, wires, rain water separation unit etc. It is easy to place and handle when needed.Its weight is much less than concrete manhole. Also, it is eco-friendly and has a long lifespan.

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Types of manhole covers

Manhole covers are designed to be opened and closed from time to time. Manhole covers are generally made of concrete, cast iron and a combination of both. Manhole covers are manufactured using these materials to be cheap, durable and heavy. Due to modernization manhole covers are manufactured and sold in various materials like fiberglass, plastic and composite.Installing Manhole

1.Ductile Iron Cover – This type of cover is made of ductile iron and nodular iron. This type of cover is very popular for its strength, rigidity, durability and resilience. Another feature is that it does not rust easily.

2.Recessed Manhole Cover – Paver block, cement and screed are used to give a nice look to pedestrian areas. They are used as a beautiful manhole cover for placement in such places. These types of manhole covers are best suited for manholes used indoors in places like workshops, hospitals, interiors of houses and garden areas of apartments.

3.Solid Top Cover – Solid top manhole cover is made of lightweight galvanized material and is designed to be visible on the top of the floor.

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