Standard Penetration Test

Standard Penetration Test

Standard Penetration Test (S.P.T) (IS 2131) It is used to determine the Relative density of undisturbed sand and silt, consistency of clay. Split spoon samples are used for this test. The pattern is first pushed through mild blows of the hammer to a seating penetration of 15cm than the pattern is pushed below complete blows of 65kg with unfastened fall of 75cm hammer to extra penetration of 30cm. The range of blows required…

Terzaghi Theory

Terzaghi Theory

Terzaghi’s Principle states that once a rock is subjected to pressure, it’s miles adversarial through the fluid strain of pores withinside the rock. analyzing that overall pressure is the same as the sum of powerful pressure and pore water strain. Assumption (1) The soil is semi-infinite, homogeneous andisotropic(2) the problem is two-dimensional,(strip footing)(3) the base of the footing is rough,(4) the failure is by general shear,(5) the load is vertical and symmetrical,(6) the ground surface is horizontal,(7)…

Types of Failure in Shallow Foundation

Shear Failure Of Foundation Soils

Types of Failure (A) General Shear Failure (B) Local Shear Failure (C) Punching Shear Failure Types of shear failure of foundation soils Depending on the stiffness of basis soil and intensity of basis, the subsequent are the modes of shear failure skilled through the inspiration soil.nding on the stiffness of foundation soil and depth of foundation, the following are the modes of shear failure experienced by the foundation…

stability-of-slopes

Stability Of Slopes

Slope balance refers back to the situation of willing soil or rock slopes to face up to or go through the movement. Similarly, a Stability Of Slopes can be locally stable if a safety factor larger than 1 is computed along any potential sliding surface running through a limited portion of the slope we study about Failure of Slopes, Factor of safety Slopes⇒ A soil mass, whilst the elevation of the floor steadily change. Natural…

Coulomb Theory of Earth Pressure

Coulomb Theory of Earth Pressure

Coulomb’s concept states that the entire lateral earth strain is the same as the response exerted via way of means of the keeping wall while the wedge of soil has a tendency to slip and acts at an attitude eight with the ordinary to the again of the wall. The backfill is dry, cohesionless, isotropic, Backfill can be inclined. There could be friction among the wall and the soil. Failure aircraft is thought to be an aircraft surface (however in reality curved), Sliding wedge is thought to be a rigid-body. Active earth pressure decreases while considering wall…