One. Punching pipe penetration
1) Before the construction, the control of the pile should be designed according to the original map, and the axis as the base of the pile by the root of the review, make measurement records, check the correct pile before the construction. Spiral pipe for piling to the scene, the lifting of the use of a little bandage lifting, to be hung to the pile position for the pile, the pile will be placed in advance pile pile pile, to ensure accurate and vertical penetration. Before piling, it is necessary to place a special pile cap on the pile head, put the pile with a hardwood cushion, piling the spiral pipe pile to the pile position, because the pile and pile cap total weight and pile hammer Placed in the pile top will sink, a lot of penetration into the soil, to be sunk to stability and then hammer;
2) Began piling, the piling machine due to penetrate into the large and empty, start hammering operations should be slowly intermittent test, until the pile into the formation of a certain depth, not continuous hit. Pile drilling process, you must always correct the pile driver bar and the vertical pile, and to maintain the pile hammer, pile cap and pile in the same longitudinal axis;
3) Piling spiral pipe into the 1 ~ 2m, should be re-corrected vertical degree, when playing to a certain depth and check the pile of good quality, and then continue to hit, until the water 60cm ~ 80cm stop hammering, Then repeat the above steps until the design elevation is reached. If the construction process found that pile tilt, should be timely adjustment or pull out the steel pipe pile re-construction;
4) Piling spiral pipe pile depth: through the river bed 10m, and a minute percussion within the number of sinking no more than 5mm.
Two. Pile
Pile connection with pile up and down butt welding. Before welding, the lower part of the pile pipe must be damaged and damaged part of the repair, the top of the pile at the end of the rust / water or oil sludge removal, polished good welding port, so that the upper and lower pile gap is 2 ~ 4mm, while multi- After each layer of weld, the timely removal of welding slag, and for the appearance of inspection, each layer of welds should be staggered, while the pile weeks with welding stopper to strengthen the upper and lower pile connection. After welding must be cooled more than 5min, and then hammer piling.
Three. Welding pile cover
After the construction of the pile pipe pile to be completed, the artificial pile into the pile to the pile top, and in the upper part of the steel pipe pile with welding pile, while welding in the outer wall 8 ~ 12 20mm anchor steel.
