Full-prefabricated pier-type portal frame inclined supporting pile structure system and construction method thereof

Abstract

The invention relates to a fully-prefabricated pier-type portal frame inclined supporting pile structure system and a construction method thereof. The fully-prefabricated pier-type portal frame inclined supporting pile structure system is characterized in that a pier-type portal frame enclosure structure is formed by inserting prefabricated parts into cement-soil mixing piles, prefabricated inclined piles are pressed into a soil layer through an inclined pile pressing-in machine, and integral connection is formed with a second enclosing purlin in the front row of the pier-type portal enclosure structure to form a stable structure with soil retaining and overturning resistance, so that the breakthrough that the enclosure structure of a two-layer basement foundation pit has no horizontal inner support is realized. According to the fully-prefabricated pier-type portal frame inclined supporting pile structure system, the inclined prefabricated piles are integrally connected with the second enclosing purlin in the front row of the pier-type portal enclosure structure to form the stable structure with soil retaining and overturning resistance, so that no horizontal support construction exists in the pit, excavation construction is facilitated, the manufacturing cost is reduced, the construction period is shortened, the compression resistance of the inclined prefabricated piles and the friction force between the inclined prefabricated piles and the soil body are fully exerted, construction is simple, efficiency is high, steel can be recycled, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of foundation pit engineering, and relates to a fully prefabricated pier-type gantry inclined support pile structure system and a construction method thereof. Background technique [0002] With the increase in the number and height of high-rise buildings, the buried depth of the foundation also increases. After entering the 1990s, with the rapid development of my country's economy, the continuous rise of urban land prices, the increase in space utilization, and the emergence of many super high-rise buildings, higher and stricter requirements have been placed on foundation pit excavation technology, that is, not only to ensure The stability of the slope must also meet the requirements of deformation control to ensure the safety of buildings, underground pipelines, roads, etc. around the foundation pit. [0003] At the same time, in order to adapt to the increasingly fierce competition in the construction mark...

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Problems solved by technology

[0003] At the same time, in order to adapt to the increasingly fierce competition in the construction market, we must also consider factors such as improving the mechanization of earthwork excavation, shortening the earthwork period, reducing project costs, and improving economic benefits. We have introduced reinforced concrete structural supports, but considering the Concrete structure supports are self-heavy and have a large layout area. Materials cannot be reused. Installation and dismantling require a long construction period. Noise, vibration, and debris will fly out during blasting demolition. Disadvantages such as unfavorable deformation control of foundation pit wall

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