Pine wood is rich in rosin, and rosin can prevent it from being corroded by groundwater and bacteria. There is a saying that "water-soaked pines are ten thousand years old". Therefore, pine piles are suitable for work below the groundwater level. However, the groundwater level changes greatly. Or areas where the groundwater is highly corrosive, pine piles should not be used. Pine piles are used in the foundation treatment of Ling Canal, a famous water conservancy project.

According to the practical experience of engineering construction on soft soil foundations, engineering geological surveys and geotechnical experiments must be carefully conducted before planning soft soil foundations. Only by ascertaining the soil layer and soil quality can planning and construction be carried out correctly; furthermore, it is necessary to Starting from the characteristics of the soil layer and soil quality of the site, we comprehensively consider the structure, construction and use of the foundation and foundation, and rationally select a foundation treatment plan through plan comparison.

Generally, when the thickness of soft soil is less than 5m, it is more suitable to use pine piles. In order to facilitate pile driving, the pile length should not exceed 4m. When making end-bearing piles, in order to ensure that the pile tip can enter the bearing layer, the upper part can be excavated to the burial depth of the foundation first. Then drive the pile. The material of the pile must be pine wood, because pine wood is rich in rosin. This rosin can well prevent corrosion by groundwater and bacteria, and is relatively cheap.

Pine piles are suitable for working below groundwater. Pine piles are not suitable for areas where the groundwater level changes significantly or where the groundwater is highly corrosive.

Practice has proven that when short wooden piles are used to deal with fragile foundations, they have the advantages of convenient construction and obvious economic benefits. They can avoid a lot of earth excavation. Therefore, in areas with abundant pine resources, it is economically and technically economically and technically feasible to use pine piles to treat fragile foundations. It is feasible, and it can be regarded as a useful method to deal with fragile foundations.