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Open-cut construction method for assembly type flat-top column-contained underground structure

An underground structure and construction method technology, applied in underwater structures, infrastructure engineering, excavation, etc., can solve the problems of extremely high requirements for hoisting and assembling equipment, large volume of prefabricated components, and low degree of assembly, and achieve industrialization. The effect of promoting application, saving templates and scaffolding, and saving construction period

Pending Publication Date: 2019-08-02
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the development of prefabricated technology, some prefabricated designs and construction technology schemes have emerged for underground structures, some of which are only suitable for open excavation foundation pits with little groundwater and slopes or anchor cables (rods), and are not suitable for The foundation pit adopts internal support and the area with rich groundwater; some only partially adopt prefabricated structure, the degree of assembly is not high, and the assembly efficiency is low; some prefabricated components are large in size and have extremely high requirements for hoisting and assembling equipment

Method used

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  • Open-cut construction method for assembly type flat-top column-contained underground structure
  • Open-cut construction method for assembly type flat-top column-contained underground structure
  • Open-cut construction method for assembly type flat-top column-contained underground structure

Examples

Experimental program
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Effect test

Embodiment 1

[0052] like Figure 1-12 As shown, this embodiment provides an open-cut construction method for an assembled flat-roofed underground structure with columns, which is suitable for main structural projects such as urban rail transit underground stations, basements, and comprehensive pipe corridors. Taking the three inner supports as an example for illustration, the construction method includes the following steps:

[0053] 1) After the construction of the two enclosure structures 1 is completed, construction 2 is constructed using the open-cut method, and three internal supports 3 are erected while excavating between the two enclosure structures 1, and excavated to the bottom of the foundation pit, such as figure 1 shown;

[0054] 2) Concrete cushion 4 is first constructed at the bottom of the foundation pit, and then a waterproof layer is constructed on the concrete cushion 4 to improve the waterproof performance of the fabricated underground structure, and then the constructi...

Embodiment 2

[0068] like Figure 13-15 As shown, this embodiment provides a connection method between the prefabricated part and the cast-in-place concrete layer, which can be used when the first side wall adopts a laminated structure and the first layer adopts a fully cast-in-place or laminated structure in Embodiment 1. The connection between the first side wall prefabricated part 12 and the first cast-in-place layer 11 or the first cast-in-place laminate can also be used for the second side wall to adopt a laminated structure, and the second laminate to adopt a fully cast-in-place or laminated structure. The connection between the second side wall prefabricated part 8 and the second layer slab cast-in-place layer or the reinforced concrete cast-in-place layer 5 during the structure; Example for illustration, the connection method of the first side wall prefabricated part 12 and the first cast-in-place laminate, the connection method of the second side wall prefabricated part 8 and the s...

Embodiment 3

[0079] This embodiment provides a method for connecting prefabricated parts to prefabricated parts, which can be used for the connection between the first plywood prefabricated part 10 and the first plywood prefabricated part 10 when the first plywood adopts a superimposed structure in the first embodiment. Connection, the connection between the second layer prefabricated part and the second layer prefabricated part when the second layer adopts the superimposed structure, the flat top layer prefabricated part 16 and the flat top layer prefabricated part 16 when the flat top layer adopts the superimposed structure The connection between; now take the connection method of two first layer prefabricated parts 10 when the first layer board adopts a superimposed structure as an example to illustrate, the connection method of two second layer board prefabricated parts, the two flat top layer boards The connection method of the prefabricated parts 16 is the same, and will not be descri...

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Abstract

The invention belongs to the field of underground engineering construction and relates to an open-cut construction method for an assembly type flat-top column-contained underground structure. The construction method comprises the following steps: (1) after an enclosure structure is constructed, constructing by adopting an open-cut method, and excavating while erecting three inner supports; (2) constructing a concrete cushion layer, a waterproof layer and a second laminate after excavating to the bottom, and detaching the lowest inner support; (3) completing the construction of a second side wall and completing the construction of a second middle vertical column and a second middle longitudinal beam; (4) completing the construction of a first laminate, and removing the middle inner support;(5) completing the construction of a first side wall, and completing the construction of a first middle vertical column and a first middle longitudinal beam; and (6) completing the construction of aflat-top board, and then removing the uppermost inner support. By adopting the construction method, the fabricated underground structure is well achieved, the application range is wide, a superposed structure is formed through part of a prefabricated part and a cast-in-place layer, on-site erecting of temporary facilities such as part of a formwork and a scaffold can be omitted, and the waterproofperformance and the overall structural stress performance of the fabricated underground structure can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to an open-cut construction method for an assembled underground structure with a flat roof and columns. Background technique [0002] At present, the open excavation method is used to construct the underground structure with internal support foundation pit using the traditional cast-in-place reinforced concrete structure construction technology, the design process is complicated, and the workload is large; the on-site construction process requires a lot of labor of various types, and the construction environment is poor. , The construction process is complicated, the construction speed is slow, and it is greatly affected by various weather and climate, so the construction quality is difficult to guarantee. At the same time, a lot of abandoned construction waste will be generated during the construction process, which not only wastes resources...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/045E02D17/04
CPCE02D17/04E02D29/04
Inventor 徐军林付先进汪国良朱丹熊朝辉蒋晔沈婷周兵向贤华王华兵王鹏许俊超胡正波李双双
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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