Pebble Layer Of Large Diameter Bored Piles Construction Technology Research

As to raise the level of the construction of large diameter pile gene its wideapplicability, construction speed, strong carrying capacity and the advantages ofhigh-rise buildings, underground engineering, highway engineering, railwayengineering, bridge engineering, port wharf engineering, and other fields in a formmore and more important. In all types of pile foundation, the application of boredpiles is more common, in particular, give priority to with bored piles. At present, thebored piles of pile length and pile diameter increasing, is also high to the requirementof bearing capacity of single pile, especially for super-long pile, large diameter pile,construction difficulty is big, easy quality safety accident, and after the accident, theprocessing difficulty is big, cost is high. So in order to promote the development ofpile foundation, must study the pore forming technology, large diameter bored piles inorder to ensure that reduce the quality problem of the construction process can beavoided.Based on the current domestic common quality influence factors in theconstruction of bored piles as a starting point, combining with follow up entity projectas the background, through the theoretical calculation and sum up as the method, witha large number of field data and experimental results as feedback and following theconclusion of "PDCA" research methods to achieve closure, detail of large diameterbored cast-in-situ concrete piles pebble layer in water pore forming technology and allkinds of quality problems and preventive measures to cope with the situation, for thesame type of geological and the structure of the pile foundation engineering toprovide guidance and advice.