Make Equation Settlement For Free

Due to the lack of unloading curve in pile test, the method proposed in this paper is used to define the elastic stiffness of pile: Ke = 608 kN/mm, thus Se = P/Ke = 1.07 mm, and . ing to the above principle, the settlement of group pile can be calculated as S = 7.26 mm.

The primary consolidation settlement can be calculated from the coefficient of volume compressibility mv, which can further lead to the Young's modulus E? = (1 + v?)(1 ? 2v?)/[mv(1 ? v?)], with an assumed Poisson's ratio v?.

Total settlement for cohesive soils are generally estimated by the sum of immediate settlement, primary consolidation and secondary compression, where immediate settlement usually constitutes a significant portion of the total settlement.

Therefore, to determine the settlements, it is necessary to know: the course of vertical stresses ?z with depth. The settlement-generating base stress ?1 = ?0 - ? ? h must be used, taking into consideration the stress reduction by the excavation unloading for the embedment depth of the foundations.

Another well-known relation is that proposed by Bond (1961), who indicated that for footings in dense sands, the ratio of settlement is equal to the square root of the ratio of the footing width and that for loose sand the width ratio exponent is smaller than 0.5.

To determine the settlement under a footing of given size loaded to the load per sq. ft. for which the curve is prepared, determine from the curve the settlement per unit of column load on the footing of the size required under the column load, and multiply by the total column load carried by the footing.

Type of soil: Differential settlement is most commonly caused by differences in the type of soil beneath a foundation. For example, sand will settle more than clay. Moisture in the soil: Soil that is too dry or too wet will settle more than soil that is at a moderate moisture level.