The Application Research On Cast-in-situ Piles Of The Administrative Center Complex Building Of Shangluo City

As a major form of pile foundation and being widely used in buildings, bridges,water conservancy, and other engineering areas, bored grouting pile plays a goodsupporting effect on most projects, meeting the design requirements with varioustechnical parameters complying with the provisions of the specification limits. However,cast-in-situ piles has the characteristic of underground construction, where thestratigraphic distribution is complex, uneven, discontinuous, variety and so on. Besides,the geological survey report is limited by the level of technology and equipmentperformance and can not accurately reflect the geological conditions; In addition, thereare constraints from construction conditions and environment, as well as skilldifferences between constructors, and other uncertainties. Thus, hole collapse, pile holetilt, expanded and reduced diameter, broken pile and other quality accidents are likely tohappen in the construction process of cast-in-situ piles.Once quality problems appearafter the cast-in-situ piles construction is completed, it is not only difficult to reinforcetechnologies, but also can cause huge economic losses. So how to use rational andfeasible construction scheme before construction and in the construction process, howto carry out scientific and effective quality control measures and accident preventionand the treatment method become very important.The purpose of this article is to summarize each link of quality control points,accident prevention and the treatment method in the construction process of cast-in-situpiles, as well as construction quality insurance through controls before and aftermatters.Starting from the development, characteristics and classification of cast-in-situ piles,with project examples as background; according to the pile construction of timesequence, the article explains construction technology and methods of the preparationwork before construction, pore forming, processing and production of reinforcing steelbar cage and concrete pouring etc, each link quality control methods and key points, aswell as the common quality accident prevention and treatment.