Pine piles are piles made of pine wood. They are mainly used to deal with soft foundations, river banks, etc. The raw material of pine piles is pine. So what is the principle of pine piles? Let's analyze it together.

The soft soil foundation reinforced with pine piles is a composite foundation. The composite foundation is composed of two parts: natural foundation soil and pile body. Compared with other composite foundations, the pine pile composite foundation has similarities except for the different materials of the piles. Its reinforcement Mechanism: 1. Support effect of pile body: Loose pile composite foundation uses pine piles to replace low-coefficient, low-strength soil with the same volume as the pile body. When subjected to the effect of external force, the stress of the foundation is redistributed according to the pile-soil stress ratio. The greater the stress As the piles become more and more concentrated on the wooden piles, the stress borne by the soil around the piles is reduced accordingly, and most of the load is borne by the pine piles. Since the strength and deformation resistance of the piles are better than those of the soil, the load-bearing capacity of the composite foundation is The force and coefficient are also better than those of the original soil, which can reduce deformation and improve the bearing capacity. 2. Extrusion effect: When constructing loose piles, hit them with a hammer, and the original soil at the pile hole position will be forcibly squeezed. On the one hand, it increases the density of the soil within a certain range around the piles and has a dense distribution effect. During construction, the pine pile composite foundation has a dense distribution effect on the soil between the piles, making the soil between the piles dense and improving the bearing capacity of the soil between the piles. Reduce compressibility.

Several issues you should pay attention to when using pine wood piles:

1. Pine piles are made of "logs" and should not be sawn into other shapes. Especially if they are cut into two halves, they cannot be made into a semicircle. The semicircular pile will soon bend too strongly and lose its effectiveness.

2. Do not use "cedar piles" or other piles to promote "pine piles". Most common woods are water-resistant and will quickly turn black, deform and rot in water. This is especially true for cedar, so it must not be used. Of course, Other woods, such as mahogany, can also be said to "can be soaked in water for 10,000 years.

3. The planning method of pine pile composite foundation is similar to that of ordinary composite foundation, but the pile center distance is often very small.

4. The horizontal resistance of the foundation soil in the mud area is very small, and the upper part of the pine pile group is prone to overall horizontal displacement, and the above-ground facilities may be damaged. Therefore, even if the need for earthquake horizontal loads is not considered, most pine piles will be paved with stones. layer to maximize the horizontal stiffness of the pile group. The stone layer can only be laid manually, so the pine piles must be squeezed as tightly as possible one by one.