Pine trees are rich in rosin, which can well prevent groundwater and bacterial corrosion. It is said that rosin has been soaked in water for thousands of years. Pine piles are suitable for working below the groundwater level. However, when the groundwater level changes greatly or the groundwater is highly corrosive, In areas where pine piles should not be used, what are the piling methods for pine piles?

According to the method of piling pine piles, it can be divided into manual piling and mechanical piling. Commonly used piling machines include hand shakers and diesel piling machines. Hydraulic excavators are also commonly used for piling. To use a hydraulic excavator for piling, two people can dig the pile and press it. Piles are pushed into the ground to stabilize themselves to a certain depth, and then the piling is removed and the excavator presses the loose piles and lowers them. Generally, one piling can be done every 35 minutes, and the work efficiency is very high.

In order to produce a good dense distribution effect and improve the foundation support force, the pile must be driven with an inner ring around the foundation. It is recommended that the piles be placed in a plum blossom shape, and the distance between the piles should not be less than 3 times the diameter of the pile. After driving the piles, saw the piles according to the planned height. , keep the piles of each pile at basically the same level, remove the excess mud when digging the piles, lay a 2030cm thick sand and gravel cushion on the top of the piles, and then pour the base concrete. The foundation will transfer part of the load to the piles through the cushion. The soil between the piles and the soil is adjusted to separate the pipes.

Setting up a cushion layer under the foundation can reduce the pile-soil stress ratio, give full play to the effect of soil between piles, increase the beta value, and reduce the stress concentration on the foundation floor. The thinner the pipe cushion layer to adjust the file vertical load by changing the cushion layer thickness, the The ratio of file load to total load is higher, and vice versa. If a mattress is not provided, the soil effect between piles cannot be achieved.