Explosion-enlarging stake construction process
A construction technology and blasting expansion technology, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of affecting the stability of soil around the first blasting pile, failing to meet the design requirements, and poor forming quality of the pile, etc. Achieve good soil compaction effect, improve process quality and bearing capacity, and improve the effect of bearing capacity
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[0008] Below in conjunction with accompanying drawing, one embodiment of the present invention is further described:
[0009] According to the blasting and expanding pile construction technology of the present invention, blasting parameters are set according to the actual situation on site, and the required aperture, hole depth, charge diameter, charge amount, concrete dosage and detonation time are determined. In order to avoid the blasting funnel being formed near the pile head during blast expansion, a bell-shaped well head 2 is dug out in the soil layer 1 at the pile head position before blast expansion. A blast hole 3 with a diameter of 100mm to 300mm is drilled in the center of the wellhead 2, and the set concentrated charge 4 is placed at the bottom of the blast hole. Then, a thin-walled plastic tube 5 with an inner diameter of 25mm to 40mm is positioned in the center of the blast hole 3, and then a strip-shaped drug pack 6 with a diameter of 25mm to 38mm is put into th...
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