What Is The Purpose Of Underpinning?

What Is The Purpose Of Underpinning?

 

Underpinning is used to transfer the load from an existing structure’s current foundation level to a deeper level in the ground. There are several reasons why this may be required. Often an excavation for a new structure will occur within feet or inches of an existing foundation, and the bottom of the new excavation will be lower than the bottom of the existing foundation. To prevent damage to the existing structure, its foundation may need to be extended to an elevation below the bottom elevation of the proposed excavation using underpinning

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