Construction method for large-span cast-in-place beam spiral pipe support foundation steel pipe pile in sludge stratum

Abstract

The invention discloses a construction method for large-span cast-in-place beam spiral pipe support foundation steel pipe piles in a sludge stratum, and belongs to the technical field of railway bridge construction. The construction method comprises the following steps that S1, the length and the number of the steel pipe piles are calculated; and S2, steel pipe pile driving and support concrete foundation pouring are conducted. Under the condition that a foundation does not need to be specially treated, a buttress foundation in a high-pier large-span cast-in-place beam support can be optimized into a specially-made sealed steel pipe pile from a traditional cast-in-situ bored pile in combination with the condition of a field deep and thick sludge stratum, a concrete foundation is poured on the specially-made sealed steel pipe pile, a spiral pipe support is erected on the specially-made sealed steel pipe pile, and after construction is completed, the concrete foundation is broken and removed, the steel pipe piles can be recycled after being pulled out; and the support foundation is convenient to treat, waste water and slurry cannot be generated, meanwhile, the stability of the support foundation is ensured, the construction period can be effectively shortened, the economic cost is saved, the ecological environment is protected, good economic and social benefits are achieved, and the method is worthy of being popularized and used.

Description

technical field [0001] The invention relates to the technical field of railway bridge construction, in particular to a construction method of a steel pipe pile for a large-span cast-in-place beam spiral pipe support foundation that can be reused in a mud stratum. Background technique [0002] In view of the poor geological conditions and complex construction environment in coastal areas, when the high-speed rail line passes through areas with a population exceeding a certain number, stations are generally installed, and continuous beams for turnouts will be installed at both ends of the stations according to the requirements of the line. Combined with the characteristics of continuous beams for turnouts, Only cast-in-place method of in-situ support can be used for construction. [0003] At present, under the condition of deep and thick silt stratum, the pier foundation of the large-span cast-in-place beam support of high pier is realized by traditional bored piles. The above...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to solve the construction steps of the buttress foundation in the traditional high-pier large-span cast-in-place beam bracket are too complicated, which will easily cause the construction period to be forced to be extended, and at the same time, it will cause bad effects on the surrounding environment. Influenced by the problem, the construction method of steel pipe piles for large-span cast-in-place beam spiral pipe support foundation in silt stratum is provided

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