2) Entering method
This method is sinking into the attack with diesel hammer or hydraulic hammer. Its advantages are high efficiency, but the disadvantage is that it is difficult to enter the pile with noise and vibration, and it is difficult to get into the piles with soil layers above the medium coarse sand.
3) Planting method
There are many foreign countries using this method, and there are not many domestic construction. It is to drill the hole with a drill, irrigate the cement slurry in the hole, and then implant the prefabricated pile into the hole. Its advantages are crowded and environmentally friendly, but the disadvantage is that the construction efficiency is low, and it cannot be constructed in cold weather due to frozen slurry.
4) Digging method
This method is invented by the Japanese, which is particularly suitable for the construction of large diameter prefabricated piles. The advantages are non -squeezing and environmental protection, but the disadvantage is that the equipment system is huge, the equipment and construction costs are high, and the efficiency is low.
5) Vibration method
Use the vibration hammer to reduce the resistance of the pile soil, and achieve the purpose of sinking pile under the action of gravity. Its advantages are that the equipment is simple, the construction efficiency is high, but the vibration affects environmental protection, and generally cannot sink into the soil layer above strong winds. It is also difficult to sink in large diameter piles.
Introduction
PHC concrete prefabricated pipe piles are used more and more in the foundation of large -scale projects, and the basic piles of large projects often require large diameter PHC pipe piles. Large diameter tube piles sink into the soil layer, especially soil layer above the medium coarse sand. The existing method is difficult, with high cost and low efficiency.
The work of this worker’s law has given full play to its respective advantages aiming at the characteristics of large diameter pipe piles, combined with vibration pile hammer and rig construction methods. It not only uses the drilling machine to take the soil in the pipe pile, reduce the pile end resistance, but also use vibration to reduce the pile resistance to the purpose of sinking piles.
Construction supporting equipment
Three -point crawler pile driver, drilling, 55T crane, small excavator, prefabricated pile and cement, pulp background unit.
Construction process
Drilling soil sinking piles → opening the wings of expansion → the construction of the roots → lift diamond positioning
Applicability
Suitable for large -diameter hollow prefabricated pile construction;
Adapt to strata: sandy, gravel, gravel, soft rock and other strata;
Scope of application: urban reconstruction, new super high -rise, municipal venue and traffic bridge pile foundation project.
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