Circular deep foundation ditch concrete pile arranging support and major structure inversing construction method

Abstract

The invention belongs to the construction method of a deep foundation pit of industrial construction, particularly relates to a reverse operating construction method of a round deep foundation pit concrete piling support and a main structure and solves the problem that the existing construction method of the deep foundation pit is not suitable for complex geological condition and the construction cost is too high. The construction method comprises the following steps: the center of the foundation pit is adopted as the center and the outer sides of the position of the main structure are respectively distributed with pilings; the top parts of the pilings are poured with crown bore beams which connects the top parts of the pilings into one body; the first section of the foundation pit is excavated, reverse operation is carried out to the outer layer of the first section of the main structure; the outer layer of the first section of the main structure and the pilings are integrated by the crown bore beams so as to form a primary support of the foundation pit; the foundation pit is excavated by sections, reverse operating construction of the outer layer of the main structure is carried out by sections, which form a foundation pit support together; and normal operating construction is carried out to the inner layer of the main structure. The invention is applicable to poor geological condition and is particularly applicable to structural diversity of the soil layer in the depth range of excavation of earthwork, thus ensuring the stability of the soil body of the main structure in the construction period, greatly reducing the cost of construction measures and improving the construction speed.

Description

technical field [0001] The invention belongs to a construction method for deep foundation pits of industrial buildings, and in particular relates to a low-cost and simple construction technology for circular deep foundation pits, which is suitable for low-cost and simple construction techniques, and a construction method for reverse construction of a circular deep foundation pit with concrete piles and a main structure. Background technique [0002] If the existing deep foundation pit construction adopts the construction scheme of underground diaphragm wall support, it is not suitable for complex geological conditions, the construction machinery is not conventional and difficult to rent, and the construction cost is too high; if the caisson construction method is used, it is not suitable for geological conditions When it is complex, if there are gravel and mudstone, it will not be able to sink, and the construction period is too long. Contents of the invention [0003] In ...

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Problems solved by technology

[0003] In order to solve the problem that the existing deep foundation pit construction method is not suitable for complex geological conditions and the construction cost is too high, the invention provides a circular deep foundation pit concrete row pile support and main structure reverse construction method

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