Pile foundation hole forming construction process under large-particle-size cobble sandy soil and severe water seepage geological condition
A technology based on geological conditions and construction technology, applied in infrastructure engineering, sheet pile walls, buildings, etc., can solve problems such as increasing the hidden danger of quality and safety in the drilling process, affecting the drilling progress, and large wear of the drill bit, so as to improve the construction efficiency, The effect of improving the quality of pile foundation and prolonging the service life
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[0029] A construction technique for forming holes in pile foundations under the geological conditions of large-size pebble sand and severe water seepage, using rotary drilling rig drilling and casing follow-up technology to form holes, and the specific construction steps are as follows:
[0030] (1) Site leveling; including construction access roads and site leveling within the construction area;
[0031] (2) Pile position setting out; according to the technical disclosure information, use the total station to measure and set out the line, determine the specific position of the pile, and mark the center position of the pile in the form of painting short steel bars;
[0032] (3) Insert and drill the outer steel casing; use the crawler crane and the hydraulic vibrating hammer to insert and drill the outer steel casing to 4~6m below the riverbed ground, the wall thickness of the outer steel casing is not less than 10mm, and its diameter is larger than the actual bored pile diamete...
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