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So, this type of foundations can also be called as partly compensated foundations instead of fully floating or compensated foundations.įloating foundations are desirable for the following types of soils: But here one point is to be noted that we cannot build a structure immediately after the excavation.ĭuring the time of construction, the effective vertical pressure under the depth of excavation may slightly increase because of unbalancing weight. Now in the next step, a building is constructed which is as same weight as of the removed soil and water.Įven the depth of excavation is below the table the total vertical pressure in the soil below the foundation is unchanged because of its balancing weight. The ground is excavated up to certain depth which is below water table. Let’s consider a ground with water table at the top as shown in the above picture. So, this foundation is also called as balancing raft foundation. The main principle of floating foundation is to balance the weight of removed soil by a structure of same weight which causes zero settlement to the structure. Floating foundation is also called balancing raft and causes zero settlement to the structure.