Pine piles are one of the more popular types of piles. They have the advantages of easily available materials, simple construction techniques, and low cost. Pine piles can be buried in the soil for thousands of years. For foundation pit bottoms on the silt layer, , can give full play to the performance of pine piles to achieve the effect of foundation pit support, and play an important role in controlling slope displacement in deep foundation pit support. However, pine piles are not suitable for areas where the groundwater level changes greatly or the groundwater is corrosive. area.

The operation process of loose pile driving:

1. Find out the thickness of the soft soil foundation to determine the length of the pine pile. The method is for 2 people to use steel drills on and around the base, testing every 23 meters.

2. Pile driving: Due to the high degree of mechanization, excavators are generally available at construction sites. The method is to use the bucket of the excavator to turn the pile over, which works very well. Only 2 people are required to place the pile in the appropriate position and gently lift it from the bucket. Press gently into the soil of the pile, then walk away and use the excavator to press the pile;

3. When driving piles, in order to achieve a good extrusion effect, it is necessary to drive the inner ring from around the base. Piles should be laid out in a plum blossom shape, and the distance between piles should not be less than 3 times the pile diameter;

4. After piling, the pile heads should be sawed flat so that the top of each pile is basically horizontal. Clean the mud squeezed out during piling, and then backfill with sand and stones. The general thickness is 2030cm, ensuring that the foundation does not cover the pile heads. Make the force even;

After piling, the following regulations should be followed when connecting long pine piles:

1. After piling, the depth of the pile joints in the ground shall not be less than 2m;

2. The height difference between adjacent pile joints should not be less than 0.75 meters;

3. Each pile must have a joint, and the joint must have a root diameter.

Note: The vibratory pile driver cannot sink extension piles.