What is Heave?
Heave, also known as ground heave, is the upward movement of the ground usually caused by the expansion of soils beneath a structure. This can result in damage to buildings, roads, and other structures, leading to costly repairs and potentially hazardous conditions.
Causes of Heave
One common cause of heave is the presence of expansive soils, such as clay, which can swell and contract with changes in moisture content. This swelling can exert significant pressure on the foundation of a building, causing it to rise unevenly.
Another cause of heave is the presence of tree roots growing near the foundation of a structure. As the roots absorb water from the soil, they can create voids beneath the foundation, leading to upward movement.
Signs of Heave
- Cracks in walls or ceilings
- Doors and windows that no longer open or close properly
- Uneven floors
- Bowing or leaning walls
Case Study: Heave Damage
In a recent study, it was found that over 20% of homes in a particular area were affected by heave damage. This damage resulted in an average repair cost of $10,000 per home, with some homes requiring extensive foundation work to prevent further damage.
Preventing Heave
There are several strategies that can be employed to prevent heave, including proper site preparation before construction, installing a proper drainage system to prevent moisture buildup, and avoiding planting trees near the foundation of a structure.
Conclusion
Heave can be a costly and dangerous problem for property owners, but with proper preventative measures and maintenance, it can be mitigated. By understanding the causes and signs of heave, property owners can take the necessary steps to protect their investments and ensure the safety of their structures.
