OUR SERVICES

BORED PILE

The system is very useful in congested areas where noise is prohibited. Here the bore is made by drilling the ground using a mechanically operated auger, chisel or by a bailer. The boring is done with the bailer which has provision for sending bentonite solution under pressure

The bored muck is carried to the surface by the circulating betonies (So it is called direct mud circulation system) Once the hard stratum reached an appropriate chisel is used to drill through the hard strata for socketing requirements. The weight of the chisel depends on the pile diameter and the capacity to be mobilized the stratum for termination is identified by observing the penetration achieved for the given chisel energy. Once the boring is complete the borehole is washed by circulating bentonite continuously. The specific gravity of the out flow solution is measured to ensure that the bore is properly cleaned. Then the reinforcement is lowered followed by tremmie and the concreting is done.

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MECHANICALLY OPERATED (DMC RIG FOR BORED PILE)

The mechanically operated auger equipment has certain distinct advantages over the rotary rig which are hydraulically operated. In the case of hydraulic rigs, when the auger drills the bore and later when it is being withdrawn it generates large suction force which leads to collapse of the bore. Further it does not have provisions for DMC due to which cleaning of boreholes cannot be ensured. In the case of mechanically operated rig there is provision for DMC which ensures effective cleaning of the bore hole as in this case bentonite is circulated under pressure Moreover pulling out of auger is so gradual that the auger comes out with least suction effect.

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DRIVEN PILE

As the name suggests, driven pile are installed by driving a casing pipe whose outer diameter represents nominal diameter of the pile. The casing pipe is driven by single acting drop hammer with the required height of fall determined by the state of compaction of the soil strata.This is obtained from the soil investigation report based on the N-value. Once the casing reaches the hard strata beyond which the rate of penetration is very small (This is termed as set. The set is defined as the penetration for a given number of blows; say for example this can be 10mm for the final 10 blows) concrete is poured with the help of chute cart, and the casing is extracted progressively, simultaneously tamping the tube as the tube is extracted.

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TOUCH PILE

Touch piles is a temporary or permanent retaining wall commonly used for excavations in urban areas. Touch piles are most suitable in conditions where well-constructed walls will not result in subsidence such as over-consolidated clays, soils above the water table if they have some cohesion, and free draining soils which can be effectively dewatered, like sands. They consist of multiples piles spaced apart from each other to support a change of elevation. Touch pile Shoring is very versatile because the size of the piles and the spacing between them can be adjusted to site soil conditions.