Difference between prestressed hollow square pile and circular pile

Difference between prestressed hollow square pile and circular pile. According to relevant information, the steps are as follows:

1, bearing capacity is different: the bearing capacity of square pile itself is equivalent to thick-walled pipe pile with an outer diameter of 500, and the cost of unit KN bearing capacity is lower than that of prestressed pipe pile, that is to say, under the same design bearing capacity, designers can choose square pile. These two kinds of piles are the foundations of buildings and can be used to bear the weight of the superstructure.

2. Different shear capacity: the theoretical shear capacity of square piles is 2-3 times that of equivalent pipe piles, and 4.5 times that of pipe piles according to the actual test of the Ministry of Construction of Japan, that is, hollow square piles have excellent seismic performance and are suitable for popularization and use in earthquake-prone areas, high-rise buildings and large-area basement building foundations. At the same time, the market price of 350 square piles is less than that of 500 outer diameter thick-walled pipe piles, so designers can choose square piles under the same budget.

3. Different impact resistance: the square pile inherits and develops the characteristics of low damage rate of the original concrete square pile. High-strength concrete with square pile head has better impact resistance than pipe pile, and the damage rate of pile head is much smaller. Square has a larger welding perimeter than round, which fully ensures the effective welding strength between piles, greatly reduces the phenomenon of joint desoldering or displacement in square pile construction, and makes it excellent in quality.