Bottom expanding and pile-forming method for pipe sinking prefabricated steel concrete pedestal pile
A technology of bottom-expanding piles and immersed pipes, which is applied in sheet pile walls, buildings, and foundation structure engineering. The effect of improving construction safety and improving strength utilization
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Embodiment 1
[0029] Embodiment 1: a. sink the immersed tube with the metal pile head through the soft soil layer to the hard soil layer at the design level; Align the feet with the marks on the mouth of the immersed tube and lower them into the immersed tube. The positioning iron feet smoothly enter the positioning groove at the lower part of the immersed tube. After the upper end of the equipment is firmly positioned, the machine power lever is activated to expand the bottom of the equipment. The expansion of the bottom is to expand the bottom vertically first. Then expand the bottom horizontally, that is, when it rotates clockwise, it advances downward, and the vertical cutter works. When it reaches the design standard depth, it stops automatically. Turn clockwise, the central axis starts to lift, the upper end of the equipment is firmly positioned, and then the equipment is started to expand the bottom. The bottom expansion is first vertical expansion and then horizontal expansion. When...
Embodiment 2
[0030] Embodiment two: step a is the same as step a described in embodiment one, b, take out the metal pile head, throw the discrete matter downwards from the immersed tube mouth, the discrete matter is quicklime or talc powder to facilitate soil absorption, expand the bottom with bottom expansion equipment For bottom excavation, when the diameter of the base is large, in order to prevent the accumulation of crushed soil and increase the resistance of the cutter, use the air suction device to absorb the soil once and then continue to expand the bottom until the base cavity shape required by the design is reached; c. Use the air soil suction equipment to take the soil for the second time until the soil is taken out; d. Use a camera with a light source to take pictures in the cavity of the base to see if the quality meets the design requirements, record the imaging and file, and correct any problems found in time; e. The radial steel bars are put into the expanded base and nailed...
Embodiment 3
[0031]Embodiment 3: The method of expanding the bottom and forming piles of immersed tube prefabricated steel concrete expanded bottom piles is as follows: a, the immersed tube with the metal pile head is passed through the soft soil and laminated to the hard soil layer at the design level; b, the metal pile is taken out Align the positioning iron feet of the bottom expansion equipment with the marks on the mouth of the immersed tube and lower the immersed tube. After the upper end of the equipment is firmly positioned, start the equipment to expand the bottom. The bottom expansion is to expand the bottom vertically and then horizontally. When the construction reaches After the design standard depth, it automatically stops, and the base cavity is formed at the bottom. At this time, when the bottom expansion cutter works to reach the designed base diameter, that is, the power rod reaches the predetermined number of revolutions, the bottom expansion is completed, and the bottom ex...
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