4/2/2024 0 Comments Dekbrands floating foundation![]() Types of soil in which the floating foundation can be possible are classified as follows: Type I Thus a partially compensated footing may exist with the characteristics of minimum settlement and nearly equal weights. This concludes that for a fully compensated foundation to exist we must be able to maintain the groundwater table to its initial level which really a tough challenge. One of the reasons is that when excavating is continued below the groundwater table there may occur seepage of water which lowers the level of groundwater, thus effecting the effective strength parameter of the soil. Such a balance of weights is only approximate so it is really tough to obtain fully compensating footing. It is also known as a compensating foundation or balancing raft. It’s an analogy to the Archimedes’ principle of floatation has resulted in such a foundation being called a floating foundation, in which a foundation structure acts as a boat floating in the water. Weight of the building = Weight of the soil excavated including water Hence there is zero net pressure acting at the bottom of the foundation resulting in zero settlement of soil below. This implies that the pressure/stress developed at the bottom of the foundation is approximately equal before and after the construction of the building structure.
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