1. When using a column machine to lift piles, the chassis of the column support frame is wider, and the piles must be transported to the front of the chassis and then lifted.
2. After the hanging column is upright, use a crowbar to stabilize the column and push it to the chassis insertion port and slowly drop it to about 10cm from the ground. Then use the crowbar to help align the column position and insert the column.
3. The two winches are started at the same time, the pressure beam is lowered, and the column cap covers the column top and presses down. The two winches are "synchronized" to ensure that the pressure beam does not deflect, so that the central axis of the pressure beam and the central axis of the column are kept in the same straight line during the pile pressing process.
4. When constructing multi-section columns, the pile connection surface should be more than 1m away from the ground.
5. The sinking depth of the pressure pile is controlled by the design elevation or the allowable static pressure value, or the elevation and static pressure value are controlled simultaneously.
6. Try to avoid stopping midway when pressing the column.
7. When the pile tip reaches the sand layer, the maximum pile pressing force can be used to act on the top of the pile, and the method of stopping and then starting, stopping and starting again can be used to make the pile sink slowly through the sand layer. .
8. When the pile resistance exceeds the capacity of the pile driver, or when the pile driver tilts greatly because there is no time to adjust the balance, the pressure should be stopped immediately and safety measures should be taken to avoid pile breakage or other accidents.
9. During pile sinking, if the pile body tilts or the sinking speed accelerates, stop applying pressure.
10. During construction, close attention should be paid to whether the pile pressing force is consistent with the pile axis, whether the contact between the pressure beam guide wheel and the dragon mouth is normal, and whether there is any jamming.
11. When the design elevation is about to be reached, the pressure cannot be stopped prematurely and the first success must be strictly controlled.
Extended information
Advantages
It completely avoids the vibration, noise and pollution caused by hammering pile driving, so there is no damage to the piles during construction and no construction work. Noise, no vibration, no impact, no pollution and other advantages. A method of engineering pile foundation construction, the static pressure pile method construction is a pile driving process in which the pile pressing mechanism of a static pile driver uses the self-weight of the pile driver and the counterweight on the frame to provide reaction force to press the prefabricated piles into the soil. Craftsmanship.
Baidu Encyclopedia - Static pressure pile
Baidu Encyclopedia - Static pressure pile sinking