Construction method for reserved laterally widened structure of underground box culvert structure

A technology of structural construction and box culverts, which is applied in the direction of earthwork drilling, road bottom layer, mining equipment, etc., which can solve the problems of increased construction difficulty, construction period and construction risks, difficulty in adjusting support positions, and difficulty in bearing the supporting axial force on the side walls of box culverts and other issues to achieve the effect of reducing construction risk and difficulty, simple and convenient construction, and saving construction period

Active Publication Date: 2014-06-18
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Problems solved by technology

[0005] 3. Since the side wall of the box culvert implemented in the early stage is difficult to bear the supporting axial force of the foundation pit in the later stage, it is often difficult to adjust the support position at this time, which increases the construction difficulty, construction period and construction risk

Method used

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  • Construction method for reserved laterally widened structure of underground box culvert structure
  • Construction method for reserved laterally widened structure of underground box culvert structure
  • Construction method for reserved laterally widened structure of underground box culvert structure

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Below in conjunction with accompanying drawing this method is described further, and its implementation method step is as follows:

[0023] A. The widened side walls of the underground box culvert structure implemented in the early stage of construction. On the side that needs to be widened, the enclosure structure 2 is separated from the internal box culvert structure, that is, the steel bars and the enclosure structure such as the underground diaphragm wall are not connected. The top plate 10, the middle plate 11, and the bottom plate 12 pick out the side wall 3 of the box culvert and extend it to the enclosure structure 2 built first, and reserve the top, middle, and bottom plate steel bar connectors 8 needed to connect the box culvert later (see figure 1 with figure 2 ), the distance between the side wall and the building envelope 2 is gene...

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Abstract

The invention discloses a construction method for a reserved laterally widened structure of an underground box culvert structure. The method comprises the following steps: carrying out the future expansion on the side walls for the box culvert structure in advance, additionally arranging reinforced concrete pilasters to be used as vertical components for bearing horizontal water and earth pressure during foundation pits excavation in expansion; using top plates, middle plates and bottom plates to support the side walls of expansion sides, and arranging steel bar connectors in the plates. In later expansion, as the pilasters can be used as load-bearing components for lateral support of foundation pits, construction risk, construction difficulty and influence on the normal operation of an already built tunnel are greatly reduced, the construction is simpler and more convenient, and the construction period is shortened.

Description

technical field [0001] The present invention relates to the field of construction of underground caverns constructed in the form of underground box culverts, in particular to the construction of underground caverns constructed in the form of underground box culverts (including tunnels such as roads and subways), which require lateral widening to meet long-term needs. The reserved structure construction type is specifically a structural construction method in which the underground box culvert structure is reserved for lateral widening. Background technique [0002] The horizontal widening construction of underground box culvert structures often has the following problems: [0003] 1. The construction risk is relatively high, which is represented by chiseling the top and bottom concrete of the box culvert structure that has been put into operation in the early stage to connect with the steel bars of the later widened box culvert structure. The concrete at the corner of the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F5/00E21D9/14
Inventor 薛勇温竹茵
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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