CN108222063B - Integral underground frame structure of assembly of shear force cotter bolt connection inner column - Google Patents
Integral underground frame structure of assembly of shear force cotter bolt connection inner column Download PDFInfo
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- CN108222063B CN108222063B CN201810013952.5A CN201810013952A CN108222063B CN 108222063 B CN108222063 B CN 108222063B CN 201810013952 A CN201810013952 A CN 201810013952A CN 108222063 B CN108222063 B CN 108222063B
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- prefabricated
- inner column
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
- E04B1/0015—Cellars constructed from prefabricated units
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses an assembled integral underground frame structure with a shear pin bolt connected with an inner column, which enables the top end and the bottom end of the inner column to form a rotatable structural form, reduces the bending moment of the end part of the inner column and improves the deformability of the inner column. The side wall of the underground structure is connected with the top plate and the bottom plate through the semi-grouting sleeve to form a complete 'hollow box' structure, and the lateral soil pressure of the soil body around the structure can be resisted. The connection of the inner columns (the connection of the inner columns with the top beam and the bottom beam) of the structure is changed from the traditional 'fixed connection' connection mode into 'hinged' connection, so that the bending moment constraint of the connection is released, the deformability of the inner columns of the underground frame structure is improved, and meanwhile, the deformation of the inner columns can be controlled by utilizing the gap between the shear pin bolt and the reserved hole channel. The prefabricated inner column is connected with the prefabricated longitudinal beam through a steel plate, and the uniform stress of a contact surface is guaranteed. The invention can improve the deformability of the inner column, coordinate the deformability of the inner column and the side wall, and improve the shock resistance of the assembled underground subway station.
Description
Technical Field
The invention is developed based on the anti-seismic performance of an assembled underground structure and an inner column splicing connection mode, and relates to an assembled integral underground frame structure which adopts a steel bar sleeve to grout and connect a side wall, and a shear pin bolt (8) to connect a prefabricated inner column (4) and can freely swing the column.
Background
Urban underground structure infrastructure is developing rapidly, and traditional construction mode brings many problems such as environmental pollution, resource waste, traffic jam etc. and prefabricated assembly structure becomes the starting point of solving these problems, therefore prefabricated assembled underground structure becomes must development trend. For a long time, the seismic problem of the underground structure is not paid enough attention, so that the structural form, the design method and the seismic theory of the underground structure are slowly developed. As seismic damage to underground structures increases, codes specify that seismic problems of underground structures must be subject to special scrutiny. Therefore, how to improve the seismic performance of the fabricated underground structure becomes a key for restricting the development of the fabricated underground structure. The anti-seismic capacity of the underground structure depends on the deformation performance of the structure, for the underground structure, the side wall is a continuous body, and the inner column is in a discontinuous mode, so that the axial pressure ratio of the inner column is far higher than that of the side wall, the deformation capacity of the inner column is obviously weaker than that of the side wall, and the deformation of the inner column and the deformation of the side wall are inconsistent. Under the action of earthquake load, the inner column becomes a key component of the whole underground structure and is the weakest part. Therefore, how to improve the deformation capability of the inner column becomes a starting point for improving the seismic performance of the underground structure.
Disclosure of Invention
In order to fully embody the advantages of a prefabricated structure and make up the defect of insufficient deformation capacity of an inner column. The invention provides a mode of connecting a structural inner column by a shear pin bolt (8).
1. An assembled monolithic underground frame structure of a shear pin bolted inner column, comprising: the prefabricated underground structure comprises a prefabricated top plate (1), prefabricated side walls (2), prefabricated bottom plates (3), prefabricated inner columns (4), prefabricated top beams, prefabricated bottom beams and shear pins (8), wherein the prefabricated side walls (2) are connected with the prefabricated top plate (1) and the prefabricated bottom plates (3) through semi-grouting sleeves (7), the prefabricated inner columns (4) are connected with the prefabricated top beams and the prefabricated bottom beams (5) through the shear pins (8), and the inner columns of the underground structure form swinging components.
2. Further, prefabricated side wall (2) adopt half grout sleeve (7) to connect to half grout sleeve (7) are reserved inside the side wall, are convenient for assemble.
3. Further, the shear pin (8) should pass through the shear pin hole (9) of the steel plate (6) and be placed in the pin hole (9) of the upper and lower prefabricated parts respectively.
4. Further, the shear pin (8) should have a strength greater than the shear strength of the prefabricated part itself.
5. Further, station roof (1) and station bottom plate (3) adopt whole prefabricated forming, and the reinforcing bar is reserved respectively at both ends, adopts half sleeve grout to be connected with the reinforcing bar in the side wall.
6. Furthermore, steel plates (6) are respectively added between the prefabricated inner column (4) and the prefabricated top beam and between the prefabricated bottom beam, so that the prefabricated column is prevented from being locally damaged.
In order to resist the lateral pressure of the surrounding soil body, the upper end and the lower end of the prefabricated side wall (2) are connected through a half grouting sleeve (7), and meanwhile, the self-waterproof effect of the structure can be achieved. Based on the swinging structure concept, the prefabricated inner column (4) is connected with the top beam and the bottom beam (5) of the prefabricated inner column by the shear pin bolt (8), the contact surface of the prefabricated inner column and the top beam is connected by the steel plate (6), the inner column forms a free swinging structure system, the traditional 'consolidation' connection mode of the inner column is changed into a 'hinge' connection mode, the stress mode of the inner column is changed, and the deformation capacity of the inner column is improved.
In order to achieve the purpose, the invention adopts the following technical scheme: the prefabricated side wall (2) is connected by adopting a semi-grouting sleeve, so that the side wall, the top plate and the bottom plate are in a consolidation connection mode, the inner columns are connected by adopting shear bolts (8), and the depth L of the inner columns affects the strength of the section A-A of the prefabricated part. The deformation of the inner column, the strength requirement of the prefabricated part and the shear pin strength can be controlled according to the ratio of the diameter R of the shear pin (8) to the diameter R of the pin hole (9). Adopt steel sheet (6) to be connected between interior post and back timber, the floorbar, constitute and possess the novel interior post structure of free swing, it includes: the prefabricated side wall structure comprises prefabricated side walls (2), a prefabricated top plate (1), prefabricated inner columns (4), prefabricated beams, shear pins (8) and the like.
Preferably, the grouting sleeve connected with the side wall is in a semi-grouting sleeve form and is reserved in the side wall, so that the installation and the manufacture of components are facilitated;
preferably, the cross section of the shear pin bolt (8) is easily selected to be rectangular, and the shear pin bolt (8) has enough shear strength to ensure the effective transmission of the shear pin bolt (8);
preferably, the depth L of the prepared holes of the prefabricated inner column (4) and the prefabricated beam and the size R of the pin bolt hole (9) are required to ensure that the net area of the inner column and the prefabricated beam (5) has enough shear strength;
the invention has the advantages of
Based on the advantages of the prefabricated assembly structure, the shear pin bolt (8) is adopted to connect the inner columns, the problem of connection of prefabricated parts is solved, and meanwhile, the connection part of the inner columns is simplified into a hinged structure form capable of freely swinging. The bending moment at the connecting position of the inner column is released, the damage of the earthquake action to the inner column is reduced, and the shear pin bolt (8) can also effectively transfer the action of shear force.
The shear pin bolt is connected with the inner column, and the effective transmission of shear force can be realized by the shear pin bolt (8). Meanwhile, the deformation of the inner column and the side wall of the structure can be coordinated by utilizing the space between the shear pin bolt (8) and the pin bolt hole (9).
The shear pin bolt is connected with the inner column, so that the bending moment constraint of the inner column can be relaxed, the inner column achieves the effect of coordinated deformation with the side wall of the station, and the integral shock resistance of the station is improved.
The sleeve in the invention adopts a semi-grouting sleeve form, and the sleeve is reserved in the member, so that the assembly and grouting of the prefabricated member are facilitated. Meanwhile, the side walls of the subway station are connected by the semi-grouting sleeves (7), so that the rigid connection of the side walls is guaranteed, and the side soil pressure is conveniently resisted.
According to the invention, the steel plate (6) is arranged between the prefabricated inner column (4) and the top and bottom beams, so that the contact surface can be uniformly stressed, and the stress concentration of the end part of the prefabricated part is avoided.
Drawings
Figure 1 is a schematic view of an assembled monolithic underground frame structure with shear pins connecting inner columns,
FIG. 2 is a schematic view of the connection between the prefabricated inner column and the prefabricated bottom beam,
figure 3 is a schematic view of the connection between the prefabricated inner column and the prefabricated top beam node,
FIG. 4 is a schematic view of the joints between the prefabricated side walls and the top and bottom plates,
FIG. 5 is a schematic view showing the relationship between the prefabricated inner stud holes, shear pins and pins
FIG. 6 is a schematic diagram showing the relationship between the pin holes, shear pins and pins of the precast beam
Description of reference numerals: 1, prefabricating a top plate; 2, prefabricating a side wall; 3, prefabricating a bottom plate; 4, prefabricating an inner column; 5-precast beams (top beam and bottom beam); 6-steel plate; 7, grouting a sleeve; 8-shear pin bolt; 9-bolt hole
Detailed Description
The invention is developed on the basis of adopting the grouting connection of a steel bar sleeve in the prior art among prefabricated components of a station, and provides an assembled integral underground frame structure form adopting a shear pin 8 to connect inner columns. The connection mode can effectively reduce the deformation of the inner column and improve the shock resistance of the inner column. The method comprises the following steps: the prefabricated side wall 2, the prefabricated bottom plate 3, the prefabricated top plate 1, the prefabricated top, the bottom beam 5, the shear pin 8 and the like. With prefabricated side wall 2, prefabricated roof 1, prefabricated bottom plate 3, prefabricated beam 5 carries out the prefabrication production, and wherein half grout sleeve 7 is reserved in prefabricated side wall 2, and prefabricated roof 1 and prefabricated bottom plate 3 set up reasonable overhanging reinforcing bar, guarantee the equipment rationality of grout sleeve 7 and overhanging reinforcing bar. Pin bolt holes 9 with reasonable sizes are reserved in the prefabricated inner columns 4 and the prefabricated beams. The effective transmission of shear force of the shear pin 8 is ensured, and meanwhile, the deformation of the inner column can be controlled within a reasonable range, so that the overall anti-seismic performance of a station is improved, and the defect that the anti-seismic capacity of key columns of an underground structure is insufficient is overcome.
The following description will be made by taking fig. 1 to fig. 6 and a typical one-floor two-span subway station as an example.
According to the concrete service function of station, work such as rational design and the atress form of deepening analysis structure. And (3) performing reasonable prefabrication on each prefabricated part, wherein pin bolt holes 9 are reserved in the prefabricated inner columns 4 and the prefabricated beams 5, the prefabricated side walls 2 are provided with semi-grouting sleeves 7, and reinforcing steel bars with certain lengths are reserved at the connecting positions of the prefabricated top plate 1 and the prefabricated bottom plate. After the prefabricated component bottom plate 3 is installed in place, the shear pin 8 is placed in the pin hole 9, the steel plate 6 is placed, the prefabricated side wall 2 and the prefabricated inner column 4 are integrally hoisted, the prefabricated inner column 4 is temporarily supported, the prefabricated side wall 2 is connected in a grouting mode, after stabilization, the shear pin 8 and the steel plate 6 at the top end of the prefabricated inner column 4 are installed, the top plate is integrally hoisted, and after the side wall and the top plate are connected in a grouting mode, the side wall support of the inner column is removed.
Claims (1)
1. An assembled monolithic underground frame structure of a shear pin bolted inner column, comprising: the prefabricated underground structure comprises a prefabricated top plate (1), prefabricated side walls (2), a prefabricated bottom plate (3), prefabricated inner columns (4), prefabricated top beams, prefabricated bottom beams and shear pins (8), wherein the prefabricated side walls (2) are connected with the prefabricated top plate (1) and the prefabricated bottom plate (3) through semi-grouting sleeves (7), and the prefabricated inner columns (4) are connected with the prefabricated top beams and the prefabricated bottom beams (5) through the shear pins (8), so that inner columns of the underground structure form swinging components;
the prefabricated side walls (2) are connected by adopting the half grouting sleeves (7), and the half grouting sleeves (7) are reserved in the side walls, so that the side walls are convenient to assemble;
steel plates (6) are respectively added between the prefabricated inner column (4) and the prefabricated top beam and the prefabricated bottom beam to prevent the prefabricated inner column from being locally damaged;
the shear pin (8) passes through a pin hole (9) of the steel plate (6) and is respectively placed in the pin holes (9) of the upper prefabricated member and the lower prefabricated member; the diameter of the pin bolt hole (9) is larger than that of the shear pin bolt (8);
the strength of the shear pin bolt (8) should be greater than the shear strength of the prefabricated part itself;
the prefabricated top plate (1) and the prefabricated bottom plate (3) are integrally prefabricated and formed, reinforcing steel bars are reserved at two ends of the prefabricated top plate and the prefabricated bottom plate respectively, and the prefabricated top plate and the reinforcing steel bars in the side walls are connected through semi-sleeve grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013952.5A CN108222063B (en) | 2018-01-08 | 2018-01-08 | Integral underground frame structure of assembly of shear force cotter bolt connection inner column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013952.5A CN108222063B (en) | 2018-01-08 | 2018-01-08 | Integral underground frame structure of assembly of shear force cotter bolt connection inner column |
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| Publication Number | Publication Date |
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| CN108222063A CN108222063A (en) | 2018-06-29 |
| CN108222063B true CN108222063B (en) | 2020-11-06 |
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| CN201810013952.5A Active CN108222063B (en) | 2018-01-08 | 2018-01-08 | Integral underground frame structure of assembly of shear force cotter bolt connection inner column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109629895A (en) * | 2018-11-29 | 2019-04-16 | 北京建筑大学 | A kind of bearing diagonal replaces the system of center pillar raising frame-type underground structure anti-seismic performance |
| CN109853768B (en) * | 2019-03-08 | 2021-04-13 | 北京建筑大学 | Reserved damping seam structure system and construction method thereof |
| CN112227361A (en) * | 2020-09-30 | 2021-01-15 | 刘晓理 | Umbrella-shaped body expanding device for resisting collision and opening umbrella and expanding method thereof |
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| DE3244374A1 (en) * | 1982-12-01 | 1984-06-07 | Helmut Duerr | Collecting duct for urban service arrangements |
| CN106223360B (en) * | 2016-07-07 | 2018-07-10 | 中铁六局集团有限公司 | Using the open cut cast in place and precast construction subway station construction method of stake supporting system |
| CN107059599B (en) * | 2017-04-27 | 2019-01-08 | 北京市市政工程设计研究总院有限公司 | Antidetonation, damping cast-in-situ bridge without support Self-resetting |
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