In building construction, underpinning refers to the process of strengthening and stabilizing the foundation of an existing structure. It is typically done when the foundation is weak, damaged, or unable to support the load of the building adequately. Underpinning involves excavating soil beneath the existing foundation and strategically placing additional support, such as concrete or steel, to reinforce and strengthen the foundation. This process helps to prevent further settlement, structural damage, and potential risks. Underpinning is commonly used in situations where the building has experienced foundation movement, cracks, or other signs of instability. It is an essential technique to ensure the safety, stability, and longevity of the structure.
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