PILE LOAD CAPACITY Pile capacity is the load capacity of the single pile or the group of piles. We will discuss here the load carrying capacity of both single pile and group of piles. SINGLE PILE CAPACITY: Vertical Load: The allowable resistance to compression Rac of a single pile is provided by the end bearing,(…)
Geotechnical Engineering
EARTH RETAINING SYSTEM FOR DEEP EXCAVATIONS
Types of Earth Retaining Systems for Deep Excavations Braced Walls or (mostly) strut support 1. Soldier pile and lagging walls with anchor or strut support 2. Sheet piling or sheet pile walls with anchor or strut support 3. Pile walls (contiguous, secant) with anchor or strut support 4. Diaphragm walls or slurry trench walls with(…)
STABILIZATION OF SOIL WITH LIME & FLYASH
Soil stabilization deals with physical, physicochemical and chemical methods to make the stabilized soil serve its purpose as pavement component material.
FACTOR OF SAFETY FOR DIFFERENT FOUNDATIONS
Factor of safety and allowable pressure: Allowable bearing pressure, from shear strength consideration, is only a fraction of the ultimate bearing capacity and is defined by the equation Where, = factor of safety against shear failure = effective overburden pressure at foundation depth The required factor of safety depends upon: Type of structure permanent or(…)
CONSTRUCTION OF WALL FOOTINGS
Wall footings are pad or spread and strip Footings. The basic purpose of this foundation is to spread the load over a larger area so that the soil is able to withstand the stress, and the safe bearing pressure is not exceeded. In such types of foundations, if the resultant of the load deviates from(…)
DEPTH OF FOUNDATION ON DIFFERENT SOILS
The depth to which foundation should be taken depends on the following principal factors: (a) Securing of adequate allowable bearing capacity, (b) In the case of clayey soils, penetration into the soil has to be below the zone where shrinkage and swelling due to seasonal weather changes and due to trees and shrubs are likely(…)
GROUND IMPROVEMENT TECHNIQUES
Ground Improvement Techniques Essential prerequisite for High Speed corridor is to have control on the degradation of track geometry so as to keep various tolerances well within the specified limits. Degradation of track geometry is a function of Track Design, Axle-Load, Speed, and Sub-Grade characteristics. Improvement of sub-grade in poor ground areas is recognized as(…)
STRAP FOOTING
When the independent footings of two columns are connected by a beam, it is called a strap footing. It is used when the distance between the columns is so great that a combined trapezoidal footing becomes quite narrow, with high bending moments. In this case the column is provided with its independent footings and a(…)