Quasi large-diameter pile formed by bunching plurality of small-diameter piles and construction method of quasi large-diameter pile

Abstract

The invention discloses a quasi-large-diameter pile formed by bunching a plurality of small-diameter piles and a construction method of the quasi-large-diameter pile. The structure of the quasi-large-diameter pile comprises a plurality of foundation pile units with the same structures, wherein a group A of foundation pile units and a group B of foundation pile units are uniformly arranged at intervals to form the foundation pile unit, both the group A of foundation pile units and the group B of foundation pile units comprise concrete main bodies and steel bar cages, occluding grooves are formed in the outer sides of the steel bar cages, and the occluding grooves in the group A of foundation pile units and the group B of foundation pipe units adjacent to the group A of foundation pile units coincide. The quasi-large-diameter pile is formed by the plurality of small-diameter piles defining a bunch with a theoretical pile center as the circle center and mutually meshing with each other to form a whole. According to the construction method of the quasi-large-diameter pile, a conventional small-diameter pile construction process is completely adopted, high-power construction machinery investment is not needed, and therefore the advantages of the large-diameter pile are achieved, the construction difficulty is reduced, and the application range is enlarged; multiple pile foundations can be constructed at the same time without the restriction of the large construction machinery, and therefore the construction period of the pile foundations is greatly shortened, the engineering cost is saved, and the economic benefits are obvious.

Description

technical field [0001] The invention belongs to the technical field of pile foundations for engineering construction, in particular to a large-diameter pile composed of a plurality of small pile bundles and a construction method thereof. Background technique [0002] The pile foundation is the most common form of structural foundation in the field of engineering construction. With the development of super high-rise buildings and long-span structures, the super-large structural load requires the pile foundation to bear more and more loads, which requires the diameter of the pile foundation to become larger and larger. Longer and longer, and mostly pile group foundations, in order to bear greater structural loads. At present, large-diameter piles of 4m and above are used in some large-scale bridge projects, such as Tongling Yangtze River Bridge and Nanchang New Bayi Bridge, which use 4m large-diameter piles, and Jiangxi Hukou Bridge, which uses 5m large-diameter piles. Compar...

AI Technical Summary

Problems solved by technology

[0003]Large-diameter pile foundations are restricted by large-scale construction machinery. Generally, large-diameter rotary drilling rigs are equipped only in super-large projects, or are used when geological conditions are available. For manual excavation pile foundations, the number of pile foundation construction machines is limited, and the construction period of large-diameter pile foundations often controls the progress of the entire project. Especially when encountering hard rocks, the construction is extremely difficult due to the limitation of mechanical power

Images