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DRIVEN PILE

A Driven piles are a total engineering solution. The design, installation and quality assurance that are a part of each driven pile combine to eliminate guesswork and produce a known, reliable and cost effective product that can accommodate a wide variety of subsurface conditions.

Driven piles consist of natural materials or pre-manufactured structural shapes built to precise tolerances utilizing high strength materials and reliable quality control. All driven piles conform to ASTM standards. Their quality is consistent from the first pile to the last and can be seen and verified prior to installation.

Driven piles maintain their shape during installation. They do not bulge in soft soil conditions and are typically not susceptible to damage from the installation of subsequent piles.

Many hollow-section piles can be visually inspected after installation to assure integrity. Most solid-section piles are uniform in section and can be dynamically inspected to verify integrity.

The pile driving process can be easily modelled prior to installation to determine adequate and economic equipment selection. Static or Dynamic testing can confirm load carrying capacities of installed piles. Dynamic testing can easily confirm proper hammer performance and its effect on the pile. Many modern hammers have impact velocity measurement devices permanently installed, providing a very high level of quality control.

BORED PILE

Bored pile is type of reinforced concrete pile which is used to support high building which has heavy vertical load.

Bored pile is a cast-in-place concrete pile where the bored piles have to be cast on construction site.

Bored piling is cast by using bored piling machine which has specially designed drilling tools, buckets and grabs, it’s used to remove the soil and rock. Normally it can drill into 50metres depth of soil. The advantage of bored piling is its’ drilling method, little vibration and lower noise level.

Bored piling is popular to be used in construction as a foundation especially for bridgework and tall building as well. Also bored piles are able to penetrate moderately hard bedrock materials more easily than other methods. They are unsuitable where the ground water level on the retained side is high.

UNDER REAMED PILE

Under reamed piles are bored cast-in-situ concrete piles having one or more number of bulbs formed by enlarging the pile stem. These piles are best suited in soils where considerable ground movements occur due to seasonal variations, filled up grounds or in soft soil strata. Provision of under reamed bulbs has the advantage of increasing the bearing and uplift capacities. It also provides better anchorage at greater depths.

These piles are efficiently used in machine foundations, over bridges, electrical transmission tower foundation sand water tanks. Indian Standard IS 2911 (Part III) – 1980 covers the design and construction of under reamed piles having one or more bulbs. According to the code the diameter of under reamed bulbs may vary from 2 to 3 times the stem diameter depending upon the feasibility of construction and design requirements.
The code suggests a spacing of 1.25 to 1.5 times the bulb diameter for the bulbs. An angle of 45 0 with horizontal is recommended for all under reamed bulbs. This code also gives Mathematical expressions for calculating the bearing and uplift capacities.

TRACTOR MOUNTED ROTARY

This type of method is very fast and requires the tractor mounted rig which is available with us. The method involves Augur boring into the ground according to the depth of the pile and the Augur rimmer varies in size according to the diameter of the pile. the required depth including the hard strata is achieved by drilling in the ground by adding DMC rods inside the hole for the required depth and by flushing the Bentonite water through a whose pipe valve from the Bentonite tank that is set up already with a drainage line to the tank

Once the boring is completed the fabricated steel reinforcement is erected inside the hole and the concrete is poured inside the bore hole. The pouring is continued until the overflow of concrete is achieved. Once it is done the temporary casing is removed and the process is finished.