Soft foundation treatment has always been a problem faced by the construction industry. A variety of soft foundations are often encountered in a project, and the situation is complex and changeable. What is the general spacing of pine piles? How to drive piles is a problem that needs to be faced during the construction process. For this reason, Shanghai Lanxiao Industrial summarizes the construction technology of pine piles for everyone, hoping to be helpful to everyone.

Generally, when the thickness of the soft foundation is less than 5m, it is more ideal to use pine piles. The material of the piles must be pine, because pine contains a large amount of turpentine, which can well prevent the erosion of groundwater and bacteria. The so-called "evergreen pine soaking" is this reason.

Because the local pine wood resources are abundant and the price is very cheap, it is also in line with the principle of using local materials. The soft foundation treatment of pine wood piles is not affected by rainy weather, the progress is fast, the workload is small, and it is suitable for the construction period. The culvert has been built for more than a year, and no significant changes have been observed. Settlement, the effect is good. It can be seen that pine piles are an effective means of treating soft foundation.

Before pressing the pine piles, clean 30cm of mud below the base to make the top surface of the foundation roughly flat. The pine piles are spaced 50cm apart and arranged in a plum blossom shape, with 1520cm reserved for the pile heads. After driving the pine piles, fill 30cm thick gravel between the piles. The stones are compacted and tamped to strictly control the pile spacing. In order to smoothly penetrate the foundation, reduce resistance, and protect the pile head during the piling process, the tail of the pine pile is cut into a tapered shape. The pine piles provided by Hechang Trading can also be cut without cutting. beat

In order to achieve good compaction effect and improve the bearing capacity of the foundation, piles must be driven from the periphery of the foundation to the inner ring. The arrangement of piles should be in a plum blossom shape, and the distance between piles should not be less than 3 times the diameter of the piles.

After piling, the pile heads should be sawed flat according to the designed elevation so that the top of each pile is basically kept on the same level. The mud squeezed out during the piling process should be excavated, and a 20-30 cm thick graded sand pad should be laid on the top of the pile. Layer and compact it, and then pour concrete on the base plate to ensure that the foundation transfers part of the load to the soil between piles through the cushion layer and adjusts the pile-soil sharing effect.

Setting a cushion layer under the foundation can reduce the pile-soil stress ratio, play the role of soil between piles, increase the spacing value, and reduce the stress concentration at the bottom of the foundation. By changing the thickness of the cushion layer, the thinner the cushion layer, the greater the load borne by the piles. The higher the percentage of the total load, and vice versa. Without a cushion, the soil between the piles cannot be used.