Pine piles are suitable for use in muddy soil foundations with low upper load, and the pine piles should be completely soaked below the underground water level.

So how should we correctly construct pine piles during construction?

According to different pile driving methods, they can be divided into manual pine pile driving and mechanical pile driving. Commonly used pile driving machines include hand winches and diesel pile drivers. Hydraulic excavators are also often used to drive wooden piles. When using a hydraulic excavator to drive piles, it is necessary to Two people hold the piles in place, turn the bucket upside down to buckle the wooden piles, and press the wooden piles into the foundation to a certain depth to stabilize themselves. Then let the pile-holding people go away, and the excavator will press down the pine piles, usually every 3-5 minutes. One pile can be driven with high efficiency. In order to achieve a good compaction effect and improve the bearing capacity of the foundation, the piles must be driven from the periphery of the base to the inner circle. The arrangement of the piles is preferably in a plum blossom shape, and the distance between piles should not be less than 3 times that of the piles. path.

After piling is completed, the pile heads should be sawn flat according to the planned elevation so that the tops of each pile are basically at the same level. The silt squeezed out during piling should be excavated and a 20-30cm thick graded sand and gravel mattress should be laid on top of the piles. And compact it, and then pour the bottom slab concrete to ensure that the foundation transfers part of the load to the soil between the piles through the cushion layer, and adjusts the dividing effect between piles and soil. Setting up a cushion layer under the foundation can reduce pile-soil stress Ratio, give full play to the role of soil between piles and reduce stress concentration on the bottom surface of the foundation. By changing the thickness of the mattress, the thinner the mattress for adjusting the vertical load of the pile, the higher the percentage of the load the piles bear in the total load, and vice versa. The same is true. If there is no mattress layer, the effect of soil between piles cannot be exerted.

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