Structural system and construction method of a central column frame assembled underground parking lot

Abstract

The invention discloses a structural system and construction method of a fabricated underground parking with a center column frame, and belongs to the field of underground engineering construction. In the construction process of the fabricated underground parking, foundation pit soil is excavated first and the construction of a supporting structure is finished, then the structural system is built by the adoption of fabricating combined structural elements, and with aiming at the excavation and supporting of the foundation pit and the construction process of the structural system, the 'One Lowers and Two Uppers' construction method suitable for the urban fabricated underground parking is summarized and put forward. The system comprises a center column structural combination, a shear wall structural combination, an outer wall of the parking structural combination, a frame column structural combination, a frame girder structural combination, an interlayer board structural combination and a key node structural combination. The related underground parking can improve the security in the construction process and provide enough construction space, and meanwhile has the advantages of achieving the shortening of construction period, the improvement of construction quality and the reduction of construction cost.

Description

technical field [0001] The invention belongs to the field of underground engineering construction, and is mainly applied to the main structural system construction project of a frame-assembled underground parking lot with a central column. Background technique [0002] During the construction of the parking lot, due to the shortage of construction land resources, the underground parking lot came into being. In order to reduce the impact of the construction process on the surrounding environment and ensure the construction quality, appropriate construction methods must be adopted. The main structure construction methods commonly used in actual engineering mainly include: (1) On-site pouring of the main structure system. In this method, after the construction of the foundation pit support structure is completed and the excavation is completed, a concrete cushion is applied at the bottom of the foundation pit, and then a waterproof layer is applied. Finally, the stressed stee...

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Problems solved by technology

[0003] The above two main structure construction methods all have their own technical deficiencies; (1) first excavation and then on-site pouring of the main structure may bring greater dust pollution during the pouring process, which consumes a lot of formwork. Many personnel, long construction period, greatly affected by the construction site environment, construction quality is not easy to control, etc.

(2) Excavation and support first, and then on-site assembly. The prefabricated components in the main structure are relatively large, and a large working space is required for the construction of the prefabricated components. Due to the existence of the support in the foundation pit, the working space is often insufficient. Satisfy

At the same time, when hoisting the prefabricated components in place, the removal of the support in the foundation pit will affect the stability of the foundation pit enclosure structure system, causing safety hazards during the construction process

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