Analysis on the Construction Technology of Steel Pipe Pile

In the construction sequence of steel pipe piles, we should first master all aspects of the project for comprehensive consideration and analysis, such as construction machinery, construction period, design requirements, landform environment, engineering quantity, layout, specifications, and characteristics of steel pipe piles, geological conditions, and other aspects. The following is a brief introduction to the construction process of steel pipe piles.

1. Steel pipe piles need to be properly stacked

The stacking site is required to be flat to ensure that large vehicles can enter directly. For the low-lying areas of the site, it is necessary to pave the road slag or road wood under the fulcrum for artificial reinforcement, and it is necessary to dig drainage ditches around the site. When stacking steel pipe piles, it needs to be stacked according to the specifications of the steel pipe piles to facilitate supporting transportation. When stacking the fulcrum, it must be ensured that the steel pipe pile is not deformed. In addition, the steel pipe piles stacked on-site should be placed within the lifting range of the pile driver. Since the steel pipe piles are lifted during hoisting, the pile tops of all steel pipe piles need to face the pile foundation and be arranged in the order of piling.

2. For the position of the steel pipe pile, move the pile driver to the pile position. If a few positions need to be adjusted, the rotary pile driver can be used to adjust them.

Before lifting the steel pipe pile, the appearance of the steel pipe pile should be comprehensively inspected, and special attention should be paid to the ovality of the steel pipe pile and the squareness of the end face of the H-type steel pipe pile. After the inspection, it is necessary to make detailed records, and the steel pipe pile can be lifted only after it is determined that it is qualified. When hoisting the steel pipe pile, the top of the steel pipe pile needs to be put into the pile cap, and the bottom of the pile should be aligned with the lime line and then inserted. The periphery of the H-type steel pipe pile is rectangular, and there are azimuth requirements for the arrangement of the piles, and it is necessary to ensure that the vertical and horizontal directions are inserted correctly; for the right-angle direction presented by the front and side of the pile driver, two theodolites can be used to align the guide rods vertically. Monitor the degree of the pile so that a vertical line is formed between the pile body, pile cap, and pile hammer.

3. Factors affecting the driving accuracy of steel pipe piles.

Affected by the weight of the steel pipe pile, the lower pile can slowly sink into the soil by its weight. This self-sinking situation should be controlled so that the self-sinking situation is in a state of slow progress, and hammering work is performed after stability is ensured. In the initial stage, the use of hammering operation can easily lead to the state of the diesel hammer, which is difficult to burn. Therefore, during this period, the quality of the pile driving needs to be tracked and observed at any time. If any abnormal situation is found, measures should be taken to correct it in time. The steel pipe pile should be pulled out and then re-inserted, and the steel pipe pile should sink along the predetermined trajectory through coercive measures.