Occlusive pile of long spiral stirring water-stop curtain and construction process thereof

Abstract

The invention relates to a novel pile-forming method of a cement-soil stirring pile. The method comprises the following steps: measuring and putting lines to determine pile position; putting a long spiral drill in place, and adopting the long spiral drill to drill a hole to determine the accurate position of a pile, loosen a hardpan and eliminate underground barrier; backfilling to the opening ofthe hole, or reversing and lifting the drill; drilling by a long spiral stirring pile drill while pumping and stirring serum to a designed hole bottom elevation; during returning upwards, guniting while stirring to the designed elevation, and then stirring repeatedly and guniting to form a pile; after finishing stirring pile construction, making use of the long spiral stirring pile drill to drillthe stirring pile to form holes; and finally, inserting slope-protection piles used in steel reinforcement cage construction after concrete grouting to form an entire curtain. The novel pile-forming method has the advantages that a long spiral stirring pile is adopted to lay a foundation for the smooth construction of slope-protection piles; the renovated long spiral drill can drill in harder soil stratum, sand stratum and gravel stratum, thereby reaching the designed depth and diameter; and the integral curtain with occlusive slope-protection piles and cement-soil piles not only supports foundation pits, but also realizes effective water stopping.

Description

technical field [0001] The invention belongs to the pile-forming technology in building foundation construction, and in particular relates to a long spiral stirring water-stop curtain occlusal pile and a construction technology for pile-forming thereof. The long spiral stirring pile is engaged with the slope protection pile to form a water-stop (water-proof or water-cutting) curtain, and can also be used for the slope protection pile and its mother pile, the composite foundation pile and its mother pile, and the anti-floating (pulling) pile mother pile. Especially in the hard soil layer in the northern region, it has more advantages. Background technique [0002] Cement-soil mixing piles are a common method of curtain piles in soft soil areas, but construction in hard soil layers in northern areas is ineffective, especially in sand and sand and pebble layers, and cannot reach the design depth, so it is no longer applicable. Rotary grouting piles are also a common method of ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings that the existing cement-soil mixing piles cannot reach the designed depth and diameter when encountering sand layers and sandy pebble formations; and the construction efficiency is low, and it is difficult to realize civilized construction, the present invention provides a long spiral mixing water-stop curtain Pile and its construction technology, and the existing long auger drilling rig has been modified, which can overcome the hard soil layer drilling, and improve the reliability of the water-stop (water-proof or water-cut) curtain

Images