Publish Time: 2020-04-22 Origin: Site
How to process the pipe piles? Steel pipe pile has high strength and high seismic resistance, which can build a highly reliable foundation. They are widely used as foundation piles for civil and construction projects.As the important foundation of construction, pipe piles play a vital role in the quality of construction.
This article contains the following:
The design process of the pipe piles
The manufacturing process of pipe piles
Other factors should be considered
The design of pipe pile is the combination of mathematical calculation and practical engineering. The minimum outside diameter of the pipe pile should be 8 inches. For tubes 14 inches or less, a minimum wall thickness of 0.25 inch is recommended. For pipes larger than 14 inches in diameter, a minimum wall thickness of 0.375 inches is recommended. However, steel tubular piles with a smaller wall thickness are allowed when filled with concrete.
In an open drive pile, axial friction acts on the inside and outside of the pile. The total resistance is the sum of the external friction force, the end bearing on the pile wall annulus and the total internal friction force or the end bearing of the plug, the smaller of the two. If the pipe pile is considered clogged, it can be assumed that bearing pressure ACTS on the entire cross section of the pipe pile. For unblocked piles, the pressure is calculated only on the annulus of pile wall. Whether the pile is considered plugged or unplugged can be calculated on a static basis. For example, a pile can be driven unplugged but inserted under static load. In some cases, the pile is driven into a hole that is too small, the pile is sprayed into place, or (in some smaller projects) the pile is drilled and grouted into place. In these cases, the soil interference caused by the installation will affect the friction value of the shaft. Normally, the value of the pile should not be exceeded; However, in some cases, axial friction may exceed these values for bored and grouted piles in superconsolidated clay. In determining the friction between bored and grouting piles, the strength of the slurry interface, including the potential impact of drilling mud, should be considered.
The manufacturing process of pipe piles is complicated. First, a closed tube is driven into the ground of a building. This can be done by hammering free fall hammers on wet sand grains or cold concrete blocks. The steel tubes are struck grain by grain and blown into the ground, where they are sealed by welds. After the desired pipe length (relative to the depth of the pipe) is reached, cut the pipe to a certain size. The steel profile alone is sufficient to withstand the required load. Pouring concrete into a pipe is usually the last step. Only the pile is filled into the concrete at the required height so that the concrete cutting can be omitted. In some cases, even concrete pile heads are not required because the support structures can be directly welded or sealed with piles.The piles can be used immediately after the manufacturing process is completed. No debris or cuttings occur with this method. Keep construction site tidy. The piles can be covered and be driven right away.
There are many other factors that effect the processing of pipe piles. The structural bearing capacity of pipe pile is calculated according to the strength of concrete and steel. The thickness of the steel shall be reduced to account for corrosion (usually by 1/16 inch to account for corrosion). Also, the local geological conditions and climatic conditions of the project must also be considered. Humidity and ph affect the corrosion rate of the pipe pile, while the viscosity and hardness of the soil affect the installation accuracy of the pipe pile.
The introducyion of pipe piles is as described above. As an indispensable material in today's engineering, pipe pile is not only relatively cheap, but also highly efficient in installation. Its assemblability also greatly improves its flexibility and can adapt to various project requirements.