Fully-prefabricated portal frame type K-shaped enclosure structure system and construction method thereof

Abstract

The invention relates to a fully-prefabricated portal frame type K-shaped enclosure structure system and a construction method thereof. According to the fully-prefabricated portal frame type K-shaped enclosure structure system, a portal frame type vertical enclosure structure is formed by inserting prefabricated parts into cement-soil mixing piles, and prefabricated inclined piles are pressed into a soil layer through an inclined pile press; and the prefabricated inclined piles are integrally connected with the front row of the portal frame type vertical enclosure structure, and a first horizontal support and the portal frame type vertical enclosure structure are combined to form a soil-retaining and anti-overturning portal frame type K-shaped stable structure, so that the breakthrough that the enclosure structure of a two-layer basement foundation pit is not provided with a second horizontal inner support is achieved. According to the fully-prefabricated portal frame type K-shaped enclosure structure system and the construction method thereof, the prefabricated inclined piles and the portal frame type vertical enclosure structure are adopted to form the soil-retaining and anti-overturning portal frame type K-shaped stable structure, so that no second horizontal support exists in the pit, excavation construction is facilitated, the manufacturing cost is reduced, the construction period is shortened, the compression resistance of the prefabricated inclined piles and the friction force between the prefabricated inclined piles and a soil body are brought into full play, construction is easy, the efficiency is high, and the steel can be recycled. 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 gantry type K-shaped enclosure structure system and a construction method thereof. Background technique [0002] As the number and height of high-rise buildings increase, the foundation depth also increases. After entering the 1990s, with the rapid development of my country's economy, urban land prices have continued to rise, and the space utilization rate has increased accordingly. Many super high-rise buildings have appeared, and there are more and more foundation pits in the second-floor basement. Higher and stricter requirements, that is, not only to ensure the stability of the slope, but also to 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...

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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, factors such as improving the degree of mechanization of earthwork excavation, shortening the earthwork construction period, reducing engineering costs, and improving economic benefits must also be considered. We have introduced reinforced concrete structural supports, but considering the reinforcement Concrete structure supports are self-heavy and have a large layout area, and the materials cannot be reused. It takes a long time to install and dismantle the foundation pit of the second-floor basement. Noise, vibration, and debris will fly out during demolition by blasting. The long construction period of the process cannot be followed Excavation follows the support, which leads to disadvantages such as unfavorable control of foundation pit wall deformation

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