Novel steel pipe cast-in-place pile and bearing capacity and internal force calculation method thereof

Abstract

The invention discloses a novel steel pipe cast-in-place pile. A structural form that a steel pipe subjected to anti-corrosion design is internally provided with a reinforcement cage and is poured with concrete is adopted to form a steel pipe and reinforced concrete combined structure. The invention further discloses a bearing capacity and internal force calculation method of the novel steel pipe cast-in-place pile. The bearing capacity calculation of the novel steel pipe cast-in-place pile foundation can be combined with the calculation method of the steel pipe pile and the cast-in-place pile, the side friction resistance refers to the steel pipe pile, and the end resistance refers to the cast-in-place pile; and under the condition that the steel pipe cast-in-place pile meets the elastic long pile condition, the ratio of the steel pipe to the concrete pile core resisting horizontal force is the same as the bending rigidity ratio of the two materials. The novel steel pipe cast-in-place pile and the bearing capacity and internal force calculation method thereof have the advantages that material waste is reduced, the section of a pile foundation is optimized, compared with a steel casing which is about to achieve the elastic long pile condition and only serves as a temporary facility, the engineering cost can be reduced by about 40% or even 50%, and the horizontal force resistance of the cast-in-place pile under the same pile diameter is improved by about 80%.

Description

technical field [0001] The invention relates to the field of high pile wharf design. More specifically, the present invention relates to a new type of cast-in-situ steel pipe pile and its bearing capacity and internal force calculation method. Background technique [0002] In the field of high-pile wharf design, both steel pipe piles and cast-in-place piles are widely used in the construction of various wharf facilities, but steel pipe piles that combine steel pipe piles with cast-in-place piles are rarely used. Even if the steel casing is used to form holes during the construction of cast-in-situ piles, it will be pulled out after the pouring is completed and before the concrete is initially set. However, it does not participate in the force calculation, resulting in waste. In this context, the present application proposes a cast-in-situ pile structure with steel pipes, that is, the novel steel pipe cast-in-place pile of the present application. At the same time, due to ...

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Problems solved by technology

At the same time, due to the unclear force distribution after the combination of steel pipes and cast-in-place piles, the calculation is complicated, and the corrosion resistance of the steel structure is poor, and the service life is quite different from that of cast-in-place piles. Therefore, no one has proposed the bearing capacity and Calculation method of internal force

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