Full composite fabricated metro station underground wall and prefabricated middle plate joint and construction method

Abstract

The invention discloses a full composite fabricated metro station underground wall and prefabricated middle plate joint structure. The full composite fabricated metro station underground wall and prefabricated middle plate joint structure comprises an underground wall, a steel structure clamping groove and a prefabricated middle plate; the steel structure clamping groove is pre-embedded in the underground wall; the steel structure clamping groove is a U shape in the whole, a lower clamping groove is pre-formed on a lower wing plate, and an upper clamping groove is pre-formed in the corresponding position of the lower part of the prefabricated middle plate; a sliding lifting device is mounted in a gap formed by the upper clamping groove and the lower clamping groove, and the prefabricated middle plate can be supported and driven to move along a metro station longitudinally; and a plurality of reinforced junction connecting devices are fixed to the upper part of the upper wing plate andthe lower part of the lower clamping groove of the lower wing plate, and correspondingly matched with underground wall longitudinal bars in the underground wall. According to the full composite fabricated metro station underground wall and prefabricated middle plate joint structure, the error problem of prefabricated underground wall hoisting and mounting is solved, and it is guaranteed that the prefabricated middle plate can accurately be in place; and by using the rigidity and the reserved reinforced junction connecting devices, longitudinal reinforcing steel bars of the underground wall arefurther connected, and weakening damage of the prefabricated underground wall is prevented.

Description

technical field [0001] The invention belongs to the field of underground engineering, especially subway stations, and in particular relates to a fully composite assembled subway station underground wall and prefabricated mid-slab node structure. Background technique [0002] Existing underground structure engineering, such as subway station structure, has two structural forms, prefabricated underground structure and full cut-and-cast underground structure, but both have their own defects. To overcome these problems, a fully composite fabricated subway station structure was developed. [0003] However, the following problems exist in the construction process of the fully composite prefabricated subway station: [0004] (1) The hoisting of the prefabricated underground wall is difficult to ensure the accuracy of the elevation. If the prefabricated underground wall has a steel bar connector reserved, there will be a deviation in height during the hoisting process, which will c...

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Problems solved by technology

[0004] (1) It is difficult to ensure the accuracy of the elevation in the hoisting of the prefabricated underground wall. If the prefabricated underground wall has a steel bar connector reserved, there will be a deviation in height during the hoisting process, which will cause the steel bar connector to be unusable, and the middle plate cannot be connected to the underground wall

[0005] (2) Simply reserve a groove on the prefabricated underground wall, which also has the problem of being difficult to position accurately. The groove position is not accurate, and the middle plate needs to be trimmed or corrected before installation, which is time-consuming and laborious

The prefabricated mid-slab needs to be hoisted in from the working shaft and assembled after a series of horizontal and vertical movements. No good solution has been found so far.

[0007] (4) According to calculations, the weight of a single prefabricated mid-slab exceeds 10t, and the interior space of the station is narrow. It is difficult to realize the horizontal transportation and assembly of the prefabricated mid-slab by the mechanical trolley seen so far

The development of a new type of mechanical trolley has a long cycle and high cost

[0008] (5) Mechanical equipment is used for the transportation and assembly of prefabricated components, which requires high ground flatness. The collision between prefabricated components and existing components caused by uneven ground will cause great damage, and the soil of the station is usually relatively soft, which limits the The use of mechanical trolleys

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