admin March 12, 2020

Manholes serve as efficient access points to different underground utilities like a sewage system. These structures — which are used when the utility needs to be inspected, maintained, repaired or upgraded — are prone to leaks and corrosion (this is where manhole rehabilitation, Houston, Texas comes into the picture).

In this article, we’re discussing the nine common causes of deterioration in manholes.

Concrete cracks. May it be in private or public property or infrastructure, leakage can be traced to cracks. If a manhole is made of concrete (and it began to have racks) or if a nearby concrete has cracks on it, a manhole will, in no time, suffer from leaking.

Inflow and infiltration. According to the US Environmental Protection Agency, a huge portion of unwanted water ending up in underground sewage lines is caused by inflow and infiltration — at 25 to 60%, to be exact. This doesn’t only damage the sewage system but their access points (a.k.a. Manholes) as well. The presence of chemicals and microorganisms in the water can cause manhole corrosion.

Poor construction materials. Sometimes, it’s not about external factors. The materials made to build a manhole (e.g. Cast iron, concrete, or both) also play a crucial role in the durability of the structure.

Improper construction methods. If it’s not the materials, it could be about the method that was used in constructing the manhole. When addressing structural concerns, hire a trusted manhole rehabilitation, Houston, Texas company to ensure the credibility and quality of their work.

Drastic changes in temperature. Extreme temperature changes can cause manhole materials to expand and contract. Over time, they weaken and eventually cause leakage or corrosion — or worse, both.

Presence of rock salt on the ground. When the winter season arrives, people use rock salts to help melt the snow on icy streets. While it is indeed helpful, there’s a catch: rock salt is a corrosive material. When it mixes with the melted ice and seeps into manholes, it can cause these structures to gradually corrode.

Ground movement. The ground moves — sometimes slightly; in other times, overwhelmingly. Whichever the case is, the movement will have an impact on the structural condition of manholes and underground utilities.

High traffic loads. When you drive over the casting of a manhole and you’re carrying a heavy load, it can help weaken the manhole’s structural integrity.

Microbial-induced corrosion. There are microorganisms found in underground infrastructure like sewer network structures — including the sulfate-reducing bacteria that can excrete hydrogen sulfide at certain conditions. Hydrogen sulfide’sbyproduct can subsequently lead to sulfuric acid, which causes corrosion not only in the underground facility but in nearby manholes as well.

On Rehabilitating Manholes

There are different options when it comes to manhole rehabilitation, Houston, Texas. Products and materials like epoxies and cementitious liners can be used to repair a leaking or corroding manhole.

However, the crucial part lies in detecting the root cause of the problem. This way, repair experts can properly apply an appropriate solution. For instance, a manhole deterioration caused by infiltration of rain/groundwater through concrete cracks can’t be solved by merely applying cementitious liners as the water inflow will eventually erode the said material.

It’s highly advisable to hire a professional rehabilitation company that delivers cost-effective solutions, phase by phase — from the inspection down to the cleaning up.

If you need help with manhole rehabilitation, Houston, Texas, contact us today at Advanced Pipe Repair. We are the trusted experts when it comes to sealing leaking manholes.

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