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‍‍pinerich inrosin, and rosin can well prevent corrosion by groundwater and bacteria, and has "water immersionWannian pine said, solog pileSuitable for working below the groundwater level. But forgroundwater levelIn areas with large changes or where the groundwater is highly corrosive, pine piles should not be used. Famous water conservancy projects——LingquThe basic processing oflog pile.‍‍

According to different pile driving methods, it can be divided into manual drivinglog pilefight with machinerylog pile.Commonly used piling machinery includes hand winches and diesel pile drivers. Hydraulic excavators are also often used for piling.log pileWhen using a hydraulic excavator to drive piles, two people are required to hold the piles in place, turn the bucket upside down to hold down the wooden piles, and press the wooden piles into the foundation to a certain depth to stabilize themselves. Then let the pile helpers go away and the excavator will press the pine piles. Generally, one pile can be driven every 3-5 minutes, which is more efficient. In order to achieve good squeezing effect and improve the bearing capacity of the foundation, piles must be driven from the 4th perimeter of the base to the inner ring. The pile arrangement is preferably in a plum blossom shape. , the distance between piles should not be less than 3 times the pile diameter. After piling is completed, the pile heads should be sawn flat according to the design elevation, so that the top of each pile is basically kept at the same level. The silt squeezed out during pile driving should be excavated, and 20 meters should be laid on the top of the pile. -30cm thick graded sand and gravel mattress and compact it, then pour the base concrete to ensure that the foundation transmits part of the load to the soil between the piles through the mattress and adjust the sharing effect between the piles and the soil. Set up under the foundation The mattress layer can reduce the pile-soil stress ratio and give full play to the role of the soil between the piles, which can increase the value and reduce the stress concentration on the bottom surface of the foundation. By changing the thickness of the mattress layer, the thinner the mattress layer can be adjusted to share the vertical load of the piles. , the higher the load the piles bear as a percentage of the total load, and vice versa. If there is no mattress, the soil between the piles cannot play a role.

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