Piles and pile foundation in use since prehistoric times. The Neolithic inhabitants of Switzerland drove wooden poles in the soft bottoms of shallow lakes or lagoons 12000 years ago and erected their homes on them. Now a day, pile foundations serve to make the place was able to the built-in an area where the soil … Read more
Liner/casing is one type of formwork. Its give desirable shape to green concrete. Generally it is made off steel, circular in shape. Incase of cast in-situ pile , there are two types of liner- Temporary liner: This type of casing is removed after the casting of concrete is complete (before start of final setting). Permanent … Read more
In all situations, consideration must be given to the possibility of the deterioration of piled foundations due to aggressive substances in soils, in rocks, in ground-waters, in the sea and in river waters. Piles in a river or marine structures are also exposed to potentially aggressive conditions in the atmosphere, and they may be subjected to abrasion from shifting sand or shingle, or damage from floating ice or driftwood. In considering schemes for protecting piles against deterioration due to these influences, the main requirement is for detailed information at the site investigation stage on the environmental conditions. In particular, adequate information is required on the range of fluctuation of river or sea levels and of the groundwater table. In the latter case, the highest levels are required when considering the likely severity of sulphate attack on concrete piles or the corrosion of steel piles, and the lowest possible levels are of considerable importance in relation to the decay of timber piles
Reinforcement is provided to enable the pile to resist the bending moment developed during pickup and transportation, the vertical load, and the bending moment caused by a lateral load.
The construction of a pile foundation requires a careful choice of piling system depending upon the subsoil condition and load characteristics of the structure. The permissible limits of total and differentials settlement, unsupported length of the pile under scour and any other special requirements of the project are also equally important criteria for adoption. For … Read more
Allowable Load— The load may be applied to a pile after taking into account its ultimate load capacity, group effect, the allowable settlement, negative skin friction and other relevant loading conditions. Bored Cast In-situ Pile — A pile formed by boring a hole in the ground by a percussive or rotary method with the use … Read more
A quick review of low strain impact tests for deep foundations, The IS code for pile integrity test IS 14893 “Pile integrity is the qualitative evaluation of the physical dimensions, continuity of a pile, and consistency of the pile materials.”