Foundation movement comes in varying degrees. An experienced professional should be consulted to assess the movement to determine the severity and provide remediation solutions as may be required.
To fully appreciate how foundation movement can be remediated, one must understand the cause of the movement. Foundation settlement and movement can be caused by one or a combination of the following:
- Dehydration of the soil creating shrinkage of the soils causing settlement
- Expansion of the soil due to too much moisture or frost action causing uplift of the foundation and its components
- Existing pile failure due to piles not being designed properly or improper installation
- “Wash Out” of bearing soil due to water erosion and/or water and sewer line issues
- Existing Foundation components bearing on soft soils not capable of handling loads
There are other causes for foundation movement, but the above five are the most common. Once again, it is very important that all relevant information be analyzed by an experienced professional to determine what is occurring. Only then can an effective remediation plan be put together.
One of the most common solutions to stabilize the foundation of a building is to underpin
the foundation down onto a more stable soil. This soil layer should be suitable by strength and type to accommodate the loads exerted on it. It should also be well below the “active soil layer”.
“Active Soil Layer” is the layer of soil that is affected by seasonal changes in moisture levels. Most commonly this soil layer is usually within the top 20 feet of soil. Periods of drought or high periods of precipitation can drastically affect expansive clay or active soils.
Underpinning is typically done by installing a pile under the existing foundation. There are many forms of piles available. Read our Discussion on Underpinning
to fully understand the different choices for underpinning that you have, how they work and what Abarent Construction Ltd’s process is. Give us the opportunity to show you the “Abarent Advantage”.