Construction technology of pile sinking of steel pipe pile

In the construction sequence of steel pipe pile, you should first grasp all aspects of the project for comprehensive consideration and analysis, such as construction machinery, construction period, design requirements, geomorphic environment, engineering quantity, layout, steel pipe pile specifications and characteristics, and geological conditions And so on. Next, I will introduce the pile sinking construction technology 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 area of the site, it is necessary to pave road slag or road wood under the supporting point for artificial reinforcement, and it is necessary to dig drainage ditches around the site. When stacking steel pipe piles, they need to be stacked according to the specifications of steel pipe piles to facilitate supporting transportation. When stacking fulcrums, it must be ensured that the steel pipe piles are not deformed. In addition, the steel pipe piles stacked on site should be placed within the lifting range of the pile driver. Because the steel pipe piles are hoisted during hoisting, the tops of all steel pipe piles need to face the pipe pile foundation and be arranged in the order of pile driving.

2. For the steel pipe pile in place, move the pile driver to the pile position. If a few positions need to be adjusted, a rotary pile machine can be used to adjust it.
Before lifting the steel pipe pile, a comprehensive inspection should be carried out on the appearance of the steel pipe pile, and special attention should be paid to the ovality of the steel pipe pile and the squareness of the end face of the H-shaped steel pipe pile. After the inspection, a detailed record shall be made, and the steel pipe pile can be lifted only after it is confirmed that it is qualified. When the steel pipe pile is hoisted, the top of the steel pipe pile needs to be put in the pile cap, and the bottom of the pile is aligned with the lime line and then inserted. The outer periphery of the H-shaped steel pipe pile is rectangular, and there are azimuth requirements for the arrangement of the piles. It is necessary to ensure that the vertical and horizontal insertions are correct; for the right-angle direction shown by the front and side of the pile driver, the guide rod can be perpendicular to the guide rod by two theodolites The degree of monitoring is carried out so that a vertical line is formed between the pile body, pile cap and pile hammer.
3. Factors affecting the accuracy of steel pipe pile driving.
Affected by the weight of the steel pipe pile, the lower pile can slowly sink into the soil by its own weight. This self-sinking situation should be controlled so that the self-sinking situation is in a slow progressing state, and the hammering work should be carried out after ensuring the stability. In the initial stage, the use of hammering operations can easily lead to the situation of diesel hammers that are difficult to burn. Therefore, during this period, the quality of pile sinking needs to be tracked and observed at any time. If abnormal conditions are found, measures should be taken to correct them in time. When the situation is serious The steel pipe pile should be pulled out and reinserted, and the steel pipe pile should be sinked along the predetermined trajectory through compulsory measures.

Pay attention to the above points in the construction process to ensure good project quality.

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