Types of Bearing Capacity Failures A bearing capacity failure is defined as a foundation failure that occurs when the shear stresses in the soil exceed the shear strength of the soil. Bearing capacity failures of foundations can be grouped into three categories, as follows: 1. General Shear Failure As shown in Fig-1, a general shear … Read more
Components Contributing Settlement of Soil Total settlement ρ in mm, which is the response of stress applied to the soil, may be calculated as the sum of three components ρ = ρi + ρc + ρs Where, ρ = Total settlement, mm ρi = Immediate or distortion settlement, mm ρc = Primary consolidation settlement, mm … Read more
Piles are structural members that are made of steel, concrete, or timber. They are used to build pile foundations, which are deep and which cost more than shallow foundations. Despite the cost, the use of piles often is necessary to ensure structural safety. The following list identifies some of the conditions that require pile foundations: … Read more
Design Considerations for Pile Foundation The pile foundation analysis is based upon several simplifying assumptions which affect the accuracy of the results. The computed results must always be reviewed with engineering judgement by the design engineer to assure that the values are reasonable. Also, the analysis results should be compared with load test results. The … Read more
Pile Classification Based On Construction Method On the basis of method of installation pile foundations can be divided into the following 6 types. Precast Driven Piles Driven Cast-in-situ Piles Bored Cast-in-situ Piles Bored Precast Piles Driven Steel Piles Driven Timber Piles 1. Precast Driven Piles These are usually of RCC or pre-stressed concrete and generally … Read more
Precast Concrete Piles – Advantages & Disadvantages Precast concrete piles are cast, cured and stored in a yard before they are installed in the field mostly by driving. Advantages of Precast Concrete Piles Reinforcement used in the pile is not liable to change its place or get disturbed The defects in pile can be easily … Read more
Advantages and Disadvantages of Drilled Pier Foundations Advantages Pier of any length and size can be constructed at the site. Construction equipment is normally mobile and construction can proceed rapidly. Inspection of drilled holes is possible because of the larger diameter of the shafts. Very large loads can be carried by a single drilled pier … Read more
What is Foundation? Foundation is the lower portion of the building usually located below ground level, which transmits the loads of the super structure to the supporting soil. A foundation is therefore that part of the structure which is in direct contact with the ground to which loads are transmitted. Functions of Foundation 1. Reduction … Read more
Footings can be of the following types. Spread or isolated or pad footing Strap footing Combined footing Strip or continuous footing Mat or raft footing What is Spread Footing or Isolated or Pad Footing? It is circular, square or rectangular slab of uniform thickness. Sometimes, it is stepped to spread the load over a larger … Read more
Piles can either be driven into the ground (driven piles) or be installed in a predrilled hole (bored piles or drilled shafts). The construction of bore cast in situ concrete pile consists of 4 primary phases 1.Pile boring, 2.Reinforcement cage lowering, 3.Flushing 4.Pile concreting. Now we will discuss each phase one by one. 1. Pile … Read more