Composite pile as well as construction method and single-pile vertical bearing capacity calculation method thereof

Abstract

The invention discloses a composite pile as well as a construction method and a single-pile vertical bearing capacity calculation method thereof. The composite pile comprises a prefabricated pile coreand a stone body wrapped around the outer side the prefabricated pile core, the prefabricated pile core is formed by connecting a plurality of prefabricated pile bodies in a segmented mode, rigid connecting plates are arranged at the pile tip, the pile top and the segmented joint of the prefabricated pile core, each prefabricated pile body is provided with a large-cross-section end and a small-cross-section end, and the pile cross-sectional area of each prefabricated pile body is gradually decreased from the large-cross-section end to the small-cross-section end along the axis. The compositepile as well as the construction method and the single-pile vertical bearing capacity calculation method thereof have the advantages that by means of the structure of the composite pile, the prefabricated pile bodies and the stone body can be tightly bonded to form a whole, slippage of the contact surfaces of the prefabricated pile bodies and the stone body can be prevented, the effective pile diameter can be increased, and the single-pile bearing capacity can be greatly increased compared with the bearing capacity of a common prefabricated pile; and in addition, the single-pile bearing capacity can be estimated through a simple standard penetration test, the calculation process is simple and convenient, and the calculation result is reliable.

Description

technical field [0001] The invention relates to the technical field of civil engineering, more specifically, to a composite pile in the fields of construction, transportation and municipal administration, a construction method thereof and a method for calculating the vertical bearing capacity of a single pile. Background technique [0002] At present, the mechanical construction methods used in pile foundations are mainly divided into two types: mechanical hole-forming piles and hammering or static pressure prefabricated piles. Rotary excavation pile is one of the most commonly used pile types in mechanical hole-forming pile. It has high construction efficiency and good manual safety. However, the disadvantages are also obvious: firstly, the bearing layer at the pile end has uncertainty, such as weathering in the middle. For end-bearing piles interbedded with strong weathering, the bearing layer at the pile end is often difficult to meet the design requirements; secondly, th...

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Problems solved by technology

[0007] However, the prior art has the following deficiencies: 1) The inserted prefabricated piles function alone and do not give full play to the advantages of the combined pile, or the prefabricated pile and the cement slurry stone body cannot form a whole to play a role together, and the combination may occur under a large load Slip damage occurs between the prefabricated pile and the cement slurry stone body in the pile; 2) The composite pile is a new pile type, the existing single pile bearing capacity calculation method is not necessarily applicable, and a simple and effective bearing capacity is required in use Force Calculation Method

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