Why square piles are used in pile foundation construction instead of pipe piles

Square piles are used in pile foundation construction instead of pipe piles because: 1. Square piles have a large outer surface area and are square or polygonal. The angle of repose between the pile body and the soil in the soil layer is much larger than that of a round pile.

Piles can achieve greater bearing capacity than pipe piles under the same geological conditions, saving basic funds for the project; 2. The bearing capacity of the 350 hollow square pile itself is equivalent to that of a thick-walled pipe pile with an outer diameter of 500, and the load capacity per KN

The cost is lower than that of prestressed concrete pipe piles; 3. The theoretically calculated shear resistance of square piles is 2-3 times that of equivalent pipe piles, and they are widely used in earthquake-prone areas and in the foundations of high-rise buildings and large basements.

; 4. The square pile inherits and develops the low damage rate of the original concrete square pile construction. High-strength concrete with a square head has better impact resistance than pipe piles and a much smaller pile head damage rate.

; The square shape has a larger welding perimeter than the circular shape, fully ensuring the effective welding strength between each section of piles, greatly reducing the joint desoldering or displacement of square piles during construction, and making the pile quality better; 5

, the shape of square piles makes it easier to develop non-welded quick connectors, which can truly achieve all-weather construction, faster construction, and avoid cracking of welded pile heads in high groundwater levels.