Civil Engineer Tricks

Pile dynamic analysis: Pile dynamic analysis verbaly spelt as PDA is conducted on the pile to determine its frictional resistance and pile integrity. To conduct this test two accelerator and two sensors are drilled and placed on the test pile.these accelerotor and sensor are connceted to a pda analyser which run by software to produce the results. A hydraulic hammer is placed on the top of test pile,and then blows where given .the accelorator and sensor will record the waves and transmit to the pda analyser.finaly PDA results are obtained in the monitor

MICRO PILES Micro piles are the friction piles constructed to transfer the load deep under the soil.they are hollow circular steel sections filled with cement grout. This piles are constructed till the predetermined depth of that particular area. The predetermined depth is the maximum depth at which the borelogs were taken. The length of each steel section varies.it consists of starter and end pile.they are connected to each other by welding. At first the location of micropile point is surveyed and then the holes are digged to required depth.then the coonected section of micropile is inserted and the cement grout will be poured and then allowed to cure. The load for the test pile is carried out to ensure the load carrying capacity of the pile.two times the design load is applied and settlement for the varying load is noted.the settlement should not be 10 percentage of the pile diameter

Piles are the structural elements which transfer the load of the super structure safely to the safe bearing strata .they are classified as end bearing piles and friction piles. Inorder to make sure the pile can transfer the load we need to do the pile load test. As per IS specification a load of two times the design load of the pile will be kept above the test pile and the test is done. The loads are applied and the corresponding settlements are noted.if the settlement is less than the 10 percentage of the diameter of pile that pile is passec.

spun piles-civil construction A prestressed piles.this type piles are cylindrical shaped of variable diameter and thickness. They are formed by spinning motion of concrete and steel reinforcement inside the pile mould subjected to curing for 28 days. the spun piles are available in various lengths,diameter and thickness. Usually there will be starter pile and end pile.,and some cases there will be extension piles also.these are the piles which is in between starter and end pile.the insufficient length formed by the starter and end pile to reach hard strata is the reason for providing extension piles. they are driven in to soil by hydraulic hammers with the help of crane. The joint between the piles are connected by welding.the final set graph will taken to Check it whether it reached sufficient depth.   spun pile Spun pile after construction .

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