Analysis of pile sinking construction technology of steel pipe pile

In the construction sequence of steel pipe piles, all aspects of the project should be mastered first for comprehensive consideration and analysis, such as construction machinery, construction period, design requirements, landform environment, engineering quantity, layout, steel pipe pile specifications, and characteristics, geological conditions, and other aspects. The following is an introduction to the pile-sinking construction technology of steel pipe piles.

1. Steel pipe piles need to be stacked properly

The stacking site must 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 logs under the fulcrum 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 the 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 hoisting range of the pile machine. Since the steel pipe piles are hoisted during hoisting, the pile tops of all steel pipe piles must face the pile foundation and be arranged in the order of pile driving.

2. In terms of steel pipe pile placement, move the pile driver to the pile position. If a few positions need to be adjusted, the rotary pile driver can be used.

Before hoisting the steel pipe pile, the appearance of the steel pipe pile should be fully inspected, and special attention should be paid to the ellipticity of the steel pipe pile and the squareness of the end face of the H-shaped steel pipe pile. After the inspection, detailed records need to be made, and the steel pipe pile can only be hoisted after it is confirmed to be qualified. When hoisting steel pipe piles, 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 before inserting it. The periphery of the H-shaped steel pipe pile is rectangular, and there are azimuth requirements for the layout of the pile. It is necessary to ensure that both the vertical and horizontal directions are inserted correctly; for the right-angled direction presented by the front and side of the pile driver, two theodolites can be used to align the guide rod vertically. 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 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 slow progress state, and the hammering work is performed after ensuring stability. In the initial stage, the use of hammering operations may easily lead to the state of the diesel hammer being difficult to burn. Therefore, it is necessary to follow up and observe the quality of the pile sinking during this period. If any abnormal situation is found, measures should be taken to correct it in time. If the situation is serious The steel pipe pile should be pulled out and reinserted, and the steel pipe pile should be sunk along the predetermined track through compulsory measures.