Hydrostatic Pressure Basement Wall

The level of ground water.

Hydrostatic pressure basement wall.

As the rain seeps into the ground the water table rises because the ground is unable to soak up all the water. The amount of hydrostatic pressure exerted on your basement walls will depend on the water table i e. Properly designed and constructed footing and foundation walls are often strong enough to hold up against the forces of nature for many years. Hydrostatic pressure refers to a water pressure and is a major cause of basement water problems.

Moment in the basement wall can be calculated as. Hydrostatic pressure describes the outward and downward pressure caused by standing water pushing against any object or surface that blocks it in this case your basement walls. M max 0 128 f a h s 2c where. Hydrostatic pressure can easily drive groundwater into the basement through gaps and cracks in the masonry.

High water pressure can also cause seepage through solid concrete. If your house is located near a large water body for example the water table in the ground is likely to be very high. M max maximum moment in the basement wall nm the position of the max. When you touch a concrete wall it s hard to believe that water can pass through it.

This rising water table creates hydrostatic pressure against your foundation and the pressurized water will find every little crack chink and hole in your foundation walls and floor and make its way into your basement. What causes hydrostatic pressure. Hydrostatic pressure is a major cause of basement water problems potentially causing leaks or worse cracking and bowing of the foundation but it can be fixed and even prevented. Four feet of water exerts nearly 300 pounds of pressure per square foot of wall and a basement footing with ten feet of saturated soil above it must withstand 600 pounds per square foot.

Normally this happens in basement floors or floors below water tables. Hydrostatic pressure on the walls also pushes water vapor through the porous concrete of your home where the drier air inside of your basement sucks it up and makes your basement air more humid. Hydrostatic pressure can also result from water that is already in the soil i e. D m 0 42 h s 2e example earth pressure on basement wall.

It s like taking a bucket and forcing it into a swimming pool. The maximum moment acting in the basement wall can be calculated as. Water weighs slightly more than 60lbs.