Pile Load Capacity Calculation in Weathered or Soft Rock This method of calculating pile load capacity was suggested by Cole & Stroud. Cole & Stroud used ‘N’ values or results of standard penetration tests to find allowable load capacity of the pile in weathered rocks. The formula suggested by Cole & Stroud is given below. … Read more
Guidelines to Follow While Constructing Pile under Water While placing concrete by tremie method, all tremie pipes should be cleaned before and after use. The diameter of tremie pipe should be preferably 200 mm for constructing piles of all diameters within 600 mm. For 25 mm down aggregate, tremie pipe should have a diameter not … Read more
Pile Load Capacity Calculation Using Standard Penetration Resistance This method of calculating pile load capacity in cohesion less soil (i.e. in sand) was suggested by Meyerhof. Meyerhof suggested the following equation, to calculate the ultimate pile load capacity in saturated sand, using standard penetration resistance (N). In the formula given below the 1st term gives … Read more
The ultimate bearing capacity of a pile is the maximum load which it can carry without failure or excessive settlement of the ground. The bearing capacity of a pile depends primarily on 3 factors as given below, Type of soil through which pile is embedded Method of pile installation Pile dimension (cross section & length … Read more
Depth of Soil Exploration Exploration, in general, should be carried out to a depth up to which the increase in pressure due to structural loading is likely to cause perceptible settlement or shear failure of foundation. This depth is known as depth of exploration, which depends upon the following factors. Type of structure Load on … 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
The knowledge about the site forms a vital role in the safe and economical development of a site. A thorough investigation of the site is an essential preliminary to the construction of any civil engineering works. Objectives of Site Investigation Work To access the general suitability of the site. To achieve safe and economical design … Read more
Based on Terzaghi’s bearing capacity equation, there are three components in contribution to the bearing capacity: (i) Surcharge pressure Foundations are normally not placed directly on the ground level. Instead, they are installed at a depth below the existing ground level. The soil pressure arising from the depth of soils serves as a surcharge imposing … Read more
Shallow foundation is commonly accepted as foundation with founding level less than 3m from ground surface. In case surface loads or surface conditions could still affect the bearing capacity, the foundation which sits on it is called shallow foundation. Pad Foundation Pad foundation refers to the foundation which is intended for sustaining concentrated loads from … Read more