CN204875868U - Induced seam structure of twin columns of subway station - Google Patents

Abstract

The utility model relates to a double-column induced joint structure of a subway station. The transverse deformation joints of the underground concrete structure of the subway station make the structural section not closed, which may easily cause water seepage in the underground structure and affect the operation safety. In the utility model, an induction joint is arranged horizontally between two structural columns; the ends of the top longitudinal beam and the middle longitudinal beam are connected to the ends of the structural column, the longitudinal ribs of the top longitudinal beam in the top longitudinal beam, and the longitudinal ribs of the middle longitudinal beam in the middle longitudinal beam Both extend to the end of the structural column and then bend inward for anchorage; the top plate and the middle plate form a cantilever form of plate reinforcement between the two structural columns; the longitudinal reinforcement of the top plate in the top plate and the longitudinal reinforcement of the middle plate in the middle plate all extend to the induced joint The side is stopped immediately, and anchoring straight hooks are left; the structural reinforcement of the bottom slab is continuous, and the longitudinal reinforcement of the bottom slab in the bottom slab and the longitudinal reinforcement of the bottom longitudinal beam in the bottom longitudinal beam run through. The utility model allows the cracks to concentrate at the induced joints, effectively releases the internal deformation, and prevents the cracks from developing randomly.

Description

A double-column induced joint structure of a subway station

technical field

The utility model belongs to the technical field of subway engineering structures, in particular to a double-column induced joint structure of a subway station.

Background technique

Cracks are a common problem in concrete structure engineering, especially for ultra-long underground concrete structures such as subway stations. Due to temperature stress and uneven settlement, cracks that develop in a large area without order will cause internal water seepage and steel corrosion, which will seriously affect the bearing capacity of the station. performance and normal use performance. At present, for such engineering diseases, the above-ground structure is generally solved by setting deformation joints and dividing structural units, but for underground structures, setting transverse deformation joints to keep the structural section unclosed is more likely to cause water seepage in the underground structure and affect operational safety.

Contents of the invention

The purpose of the utility model is to provide a double-column induced joint structure of a subway station, allowing cracks to concentrate at the induced joints, releasing internal deformation, and preventing cracks from developing randomly.

The technical scheme adopted in the utility model is:

A double-column induced joint structure of a subway station, including two structural columns and top longitudinal beams, middle longitudinal beams and bottom longitudinal beams arranged from top to bottom on both longitudinal sides of the two structural columns. The top of the longitudinal beam is the middle plate, and the bottom of the bottom longitudinal beam is the bottom plate, which is characterized in that:

The net distance between the two structural columns is 250mm, and an induction joint is arranged transversely between the two structural columns;

The ends of the top longitudinal beam and the middle longitudinal beam are connected to the end of the structural column, and the structural column longitudinal reinforcement is arranged inside the structural column, and the top longitudinal beam longitudinal reinforcement in the top longitudinal beam and the middle longitudinal beam longitudinal reinforcement in the middle longitudinal beam all extend to the structural column The end is bent inward and anchored; the top plate and the middle plate form a steel bar cantilever form between the two structural columns; A straight anchor hook is left;

The structural reinforcement of the bottom slab is continuous, and the longitudinal reinforcement of the bottom slab in the bottom slab and the longitudinal reinforcement of the bottom longitudinal beam in the bottom longitudinal beam run through.

Reserve drainage grooves on the lower surface of the roof along the induction joints;

The drainage groove is a semi-circular or U-shaped component formed by curling a 1mm thick stainless steel plate. It is fixed under the top plate by a fixing hoop, and the fixing hoop is set every 1m along the induction joint;

Embed steel-edged rubber waterstops in the top and bottom slabs along the induced joints;

The steel edge rubber waterstop is embedded between the longitudinal reinforcement of the structural column on the side of the two structural columns, and the steel edge rubber waterstop is arranged in an upward "V"-shaped corner.

The induced joints are set in a concave-convex groove-and-groove structure at the bottom plate, where the bottom plate is thickened and structural steel bars are set.

The utility model has the following advantages:

(1) The larger clear distance of 250mm is used to replace the conventional small clear distance of 30mm between the two columns, which can provide space for the roof waterstop to be buried. The width of commonly used waterstops is 350mm, and the upward "V"-shaped corners are arranged to facilitate the discharge of air bubbles in the concrete during construction. The distance between the two columns is 250mm, and the thickness of the protective layer of the steel bars of the columns is used again. The roof and bottom waterstops can be embedded between the longitudinal bars of the double columns, without affecting the arrangement of the steel bars of the columns, and avoiding the construction caused by the longitudinal bars of the double columns circumventing the waterstops. Unchanged and reduced mechanical properties. At the same time, the large net distance of 250mm facilitates the installation of water receiving tanks between the double columns, and drainage can be carried out after seepage to avoid direct flow into the station.

(2) The induction joint can be implemented with the post-casting belt at the bottom plate, and the groove-and-groove structure is adopted at the secondary pouring interface of the bottom plate, which can prevent the deflection deformation and excessive shear displacement of the bottom plate with too small curvature radius.

(3) Cracks are concentrated at the induced joints to reduce cracks in other parts of the structure, and the performance is guaranteed by strengthening waterproofing to reduce later maintenance work.

(4) Compared with setting the joints at the 1/3 span position of the longitudinal beam, the induced joints of the double columns have better structural stress and more reliable artificially induced cracking.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

Fig. 2 is an enlarged schematic diagram of part A in Fig. 1 .

Fig. 3 is an enlarged schematic diagram of part B in Fig. 1 .

In the figure, 1-structural column, 2-induced joint, 3-roof, 4-roof longitudinal reinforcement, 5-top longitudinal beam, 6-top longitudinal beam longitudinal reinforcement, 7-middle plate, 8-middle plate longitudinal reinforcement, 9 -Middle longitudinal beam, 10-Middle longitudinal beam longitudinal reinforcement, 11-Bottom plate, 12-Bottom longitudinal reinforcement, 13-Bottom longitudinal beam, 14-Bottom longitudinal beam longitudinal reinforcement, 15-Fixing hoop, 16-Drainage groove, 17-Steel Edge rubber waterstop, 18-structural column longitudinal reinforcement.

Detailed ways

The utility model is described in detail below in conjunction with specific embodiments.

The utility model adopts the principle of "limited stiffness" to arrange induction joints along the horizontal direction of the station, so that the steel bars are broken at specific positions and the concrete is poured continuously, forming weak parts in the structure, allowing cracks to concentrate at the induction joints, releasing internal deformation and avoiding cracks Feel free to start. At the same time, waterproof and drainage are strengthened at the induced joints to ensure the good use of the structure and reduce maintenance work.

The utility model relates to a double-column induced joint structure of a subway station, comprising two structural columns 1 and top longitudinal beams 5, middle longitudinal beams 9 and bottom longitudinal beams arranged from top to bottom on the longitudinal sides of the two structural columns 1 13. The top of the top longitudinal beam 5 is the top plate 3, the top of the middle longitudinal beam 9 is the middle plate 7, the bottom of the bottom longitudinal beam 13 is the bottom plate 11, the structural column 1 is the frame column of the subway station, and the longitudinal reinforcement of the structural column 18 is the stress reinforcement of the frame column . The net distance between the two structural columns 1 is 250 mm, and an induction joint 2 is arranged laterally between the two structural columns 1 . The ends of the top longitudinal beam 5 and the middle longitudinal beam 9 are connected to the end of the structural column 1, and the top longitudinal beam longitudinal rib 6 in the top longitudinal beam 5 and the middle longitudinal beam longitudinal rib 10 in the middle longitudinal beam 9 both extend to the structural column 1 The end is bent inward and anchored; the top plate 3 and the middle plate 7 form a cantilever form of plate reinforcement between two structural columns 1; the top plate longitudinal rib 4 in the top plate 3 and the middle plate longitudinal rib 8 in the middle plate 7 all extend The induction seam 2 ends at the side, and a straight anchor hook is left. The structural reinforcement of the bottom plate 11 is continuous, and the longitudinal bars 12 of the bottom plate in the bottom plate 11 and the longitudinal bars 14 of the bottom longitudinal beam in the bottom longitudinal beam 13 run through.

Drainage grooves 16 are reserved on the lower surface of the top plate 3 along the induction joints 2 to drain water seepage from the induction joints 2 to avoid directly flowing into the station. The drain groove 16 is a semicircular or U-shaped component formed by curling a 1mm thick stainless steel plate, and is fixed below the top plate 3 by fixing hoops 15, and the fixing hoops 15 are arranged along the induction joint 2 every 1m. Embed steel-edged rubber waterstops 17 in the top plate 3 and bottom plate 11 along the induction joint 2 , arrange them in an upward “V”-shaped corner, and embed them between the longitudinal ribs 18 on the sides of two structural columns 1 .

The induction joint 2 is provided with a post-casting belt at the base plate 11 at the same time, and the secondary pouring interface adopts a concave-convex groove structure. Less than 300mm, side protruding 100mm. The bottom plate 11 is thickened at this place to ensure that the thickness of the bottom plate within a distance of 800 mm on both sides of the induction joint is not less than 950 mm, and structural reinforcement is provided.

Set the joint reinforcement at the position of the induction joint 2, and the reinforcement adopts a sliding connection method; when constructing a double-column induction joint structure, it should include structural waterproof treatment, including the top plate 3, the bottom plate 11, and the inner side wall at the position of the induction joint. Buried steel-edged rubber waterstop 17, the upper part of the top plate 3 is provided with a reinforced waterproof layer, and the outer surface of the side wall and the lower surface of the bottom plate 11 are provided with an externally attached waterstop and a waterproof reinforced layer.

The content of the utility model is not limited to the examples listed, and any equivalent transformations taken by those skilled in the art to the technical solution of the utility model by reading the specification of the utility model are covered by the claims of the utility model.

Claims (3)

1. A double-column induced joint structure of a subway station, including two structural columns (1) and top longitudinal beams (5) and middle longitudinal beams (9) arranged from top to bottom on the longitudinal sides of the two structural columns (1). ) and the bottom stringer (13), the top stringer (5) is the top plate (3), the top stringer (9) is the middle plate (7), the bottom stringer (13) is the bottom plate (11), and Features: The net distance between the two structural columns (1) is 250 mm, and an induction joint (2) is arranged laterally between the two structural columns (1); The ends of the top longitudinal beam (5) and the middle longitudinal beam (9) are connected to the end of the structural column (1). The structural column (1) is provided with structural column longitudinal reinforcement (18). The longitudinal reinforcement (6) of the longitudinal beam and the longitudinal reinforcement (10) of the middle longitudinal beam (9) are all stretched to the end of the structural column (1) and then bent inward for anchoring; the top plate (3) and the middle plate (7) The overhanging form of plate reinforcement is formed between the two structural columns (1); the roof longitudinal reinforcement (4) in the roof (3) and the middle plate longitudinal reinforcement (8) in the middle plate (7) all extend to the induced joint (2 ) on the side, and leave a straight anchor hook; The structural reinforcement of the base plate (11) is continuous, and the longitudinal ribs (12) of the base plate (11) and the longitudinal ribs (14) of the bottom longitudinal beam (13) in the base plate (11) run through. 2. The double column induction joint structure of a kind of subway station according to claim 1, is characterized in that: Reserve a drainage groove (16) on the lower surface of the top plate (3) along the induction joint (2); The drainage groove (16) is a semi-circular or U-shaped component formed by curling a 1mm thick stainless steel plate, fixed under the top plate (3) by the fixing hoop (15), and the fixing hoop (15) is along the induction joint (2) Set one every 1m; Embed steel-edged rubber waterstops (17) in the top plate (3) and bottom plate (11) along the induction joint (2); The steel edge rubber waterstop (17) is embedded between the structural column longitudinal reinforcement (18) on the side of the two structural columns (1), and the steel edge rubber waterstop (17) is arranged in an upward "V"-shaped corner . 3. The double column induction joint structure of a kind of subway station according to claim 2, is characterized in that: The induction joints (2) are arranged in a concave-convex structure at the bottom plate (11), where the bottom plate (11) is thickened and structural steel bars are set.