Novel composite pile structure and construction method

Abstract

The invention provides a novel composite pile structure. The pile structure comprises a hollow steel pipe, a bed, a guide frame and a rotating device; the bed is arranged on the ground to be constructed; the guide frame is arranged on the bed; the hollow steel pipe can penetrate through a through hole in the bed to be driven below a stratum; a drill bit structure is installed below the hollow steel pipe; a plurality of stirring blades are arranged on the drill bit structure; a guniting opening is formed in the bottom of the drill bit structure; a grouting pipe is arranged in the hollow steel pipe; a slurry pump is connected to the upper side of the grouting pipe; the lower side of the grouting pipe communicates with the guniting opening; cement slurry enters the grouting pipe through the slurry pump and is sprayed out from the guniting opening; and the hollow steel pipe is driven by the rotating device to rotate and move downwards at the same time. The invention further provides a construction method of the composite pile structure. A high-strength steel pipe pile and a relatively-low-strength cement soil mixing pile are combined, high strength and high bearing capacity are achieved, and meanwhile, the good composite effect with foundation soil is achieved; and the design is reasonable, the structure is simple, assembling and disassembling are convenient, and the applicabilityis high.

Description

technical field [0001] The invention belongs to the field of construction engineering research, and in particular relates to a novel composite pile structure and a construction method thereof. Background technique [0002] There are many types of pile structures used for foundation treatment, and the construction methods are also ever-changing. Various types of piles have their corresponding applicability, but they also have their own shortcomings. For example, prefabricated reinforced concrete piles and steel pipe piles have high strength and large bearing capacity. The mutual composite effect between them is not obvious, and a certain deep underground stratum with high strength is required as the bearing layer of the pile foundation. However, in urban construction, the stratum that can be used as the bearing layer is often buried deep, which requires a long pile length. long and therefore expensive. Another type of pile, such as cement-soil mixing pile, mortar pile and g...

AI Technical Summary

Problems solved by technology

Various types of piles have their corresponding applicability, but they also have their own shortcomings. For example, prefabricated reinforced concrete piles and steel pipe piles have high strength and large bearing capacity. The mutual composite effect between them is not obvious, and a certain deep underground stratum with high strength is required as the bearing layer of the pile foundation. However, in urban construction, the stratum that can be used as the bearing layer is often buried deep, which requires a long pile length. long and therefore expensive

Another type of pile, such as cement-soil mixing pile, mortar pile and gravel pile, etc., has a relatively small strength of the pile body and a relatively good composite effect with the foundation soil, but due to the relatively low strength of the pile body, its bearing capacity is also limited Relatively small, its scope of application is also very limited

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