Utility holes are mostly installed to improve the infrastructure of the urban areas within a country. They provide access to underground sewer systems and enable workers to carry out maintenance activities without any difficulty. A simplified explanation of a manhole is that it is a vertical access point to the underground utility systems installed, usually at a junction. Apart from maintenance, it also allows for easier cleaning, inspection, and upgrading operations. These manholes are also beneficial in repairing the underground telephone lines, electricity wires, and the gas system of the area.

Construction of Maintenance Holes

The materials used for constructing manholes are extremely strong and hard, yet quite inexpensive. Here's a list of materials used for the construction of utility holes;

• Iron casts
• Concrete

However, many manufacturers also use both of them for constructing a durable and stronger utility hole. Below is a list of materials used in today's manufacturing of maintenance holes resulting from the advancements in technology;

• Plastic
• Fiberglass
• Composite

It is vital to choose the materials that provide manholes with increased endurance and a long lifespan.

Reasons for Installing Maintenance Holes

The primary purposes of creating maintenance holes are as follows;

• It provides the underground sewage system a sufficient amount of ventilation and prevents them from getting damaged.
• Construction of manholes enables the installation of lengthy sewer lines.
• It helps in joining multiple sewers together to benefit from an efficient drainage system. Moreover, it can help in performing activities like the alignment of sewers.
• It allows workers to remove any obstruction within the underground sewage system.
• The sewers are also inspected and cleaned accordingly through the utility holes.

Such sewer coverings have become very common in many modernized cities across the world. It keeps the drains in perfect condition and the streets clean.

Types of Utility Holes

The three types of manholes are as follows;

1. Shallow: They have a depth ranging from 75 to 90cm and are mostly placed in an area with little traffic. It also has a lightweight cover, also known as the inspection chamber.
2. Standard: This is a square-shaped cover placed at the sewer line and has a depth of about 150cm.
3. Deep: It is a heavy corner top with a depth greater than 150cm.

Sizes and shapes might be altered to suit the requirements of different applications accordingly. A sanitary manhole has been in use for many years for their increased accessibility and advantages.
 

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