Pine pile reinforced soft soil foundation is a composite foundation. The composite foundation is composed of natural foundation soil and pile body. Compared with other composite foundations, pine pile composite foundation has similarities except that the pile materials are different. Its reinforcement mechanism is as follows :

1. Supporting role of piles: The pine pile composite foundation replaces low-modulus, low-strength soil with the same volume as the piles. When subjected to external loads, the stress in the foundation is redistributed according to the pile-soil stress ratio. When the stress gradually concentrates on the piles At this time, the stress of 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 bearing capacity and modulus of the composite foundation formed are also better than those of the original soil, thus achieving reduction Small deformation and improved bearing capacity effect.

2. Condensation: During the construction process of pine piles, the original soil at the pile hole is forced to be squeezed laterally, which increases the density of the soil layer within a certain range around the pile and plays a squeezing effect. The pine pile composite foundation is under construction The squeezing effect on the soil between the piles makes the soil between the piles dense, thereby increasing the bearing capacity of the soil between the piles and reducing the compressibility.

In addition, the editor suggested that wooden piles should mainly be purchased at the local timber market and transported to the construction site by car; for purchase, choose pine logs with a diameter of 4m and 300px. Peel and check the material to ensure the quality. There should be no defects or excessive bending. Individually bent logs , the raised part should face the foundation pit. There should be no holes, cracks or other defects that are enough to damage the strength of the pile body.

During the lifting, loading, unloading and stacking process of wooden piles, the pile body must not be hit or vibrated to avoid damage to the pile body. When using wooden piles, they should be used in the order they arrive at the construction site, and the integrity of the wooden piles should be checked. The stacking foundation must be solid , smooth and without any subsidence to avoid pile deformation.