Pipe pile features:

       1. Specifications are all Φ300mm-Φ600mm.

       2, high strength, fast production speed: using steam curing, 1 day can be formed off the line, and C80 concrete strength is 2-4 times higher than ordinary precast pile.

       3, stable quality: factory production, quality control can be relatively perfect.

       4. Simple construction: The finished product can be directly piled up when it is transported to the construction site, and the construction speed is fast.

       5. Low cost: Within the reasonable use of pipe piles, it has obvious advantages compared with other mainstream pile types.

Disadvantages: I have summarized it, there are the following points:

1. The bearing capacity is limited by the cross-sectional area of the ring pile concrete. It is impossible to be too large. It must be noted that it should not be used as a large-diameter bored pile. Some buildings with large loads require a single pile. If the bearing capacity is high, or some owners try to find the maximum bearing capacity of the single pile through the static load failure test before construction, it is necessary to pay attention to the reliable material strength. For example, the design value of vertical bearing capacity of pile single pile pile of PHC500(120)A type is Rp=3250kN. If you test pile (of course, test pile according to the specification), the characteristic value of single pile bearing capacity is 4000kN, you have to It is simply impossible to convince the design institute to use 4000 instead of 3250kN. The reason is very simple. The material strength of several samples used in the test pile alone does not indicate that the reliability of the material strength during large-scale construction can reach the standard when the pile is tested. To put it bluntly, maybe the piles when you test the piles are just right. "It's very strong!" ! We have a confidence interval for the material strength design value selection. Only when most (usually 95%) materials have strengths in this interval, the concept of material strength is meaningful. The material strength of the pipe pile is resisted by the concrete axis. Compressive strength, pile-forming technology, cross-sectional area control, this is also a statistical problem, therefore, the value of the design institute is generally more cautious.

2. The quality of pipe piles in different piles varies greatly, which makes it difficult for the owners to choose;