CN206971554U - A kind of assembly concrete post plug-in type bolt splices node - Google Patents

Abstract

The utility model proposes a prefabricated concrete column plug-in bolt splicing joint, the splicing joint includes a tenon end structure and a tenon end structure; the tenon end structure includes a tenon protrusion and a tenon enclosure structure; the tenon end structure includes a tenon recess The tenon and mortise enclosure structure; the tenon protruding part matches the tenon recess; the tenon enclosure structure and tenon enclosure structure both include a splicing surface guard plate and a fastener joint plate; the splicing surface guard plate of the tenon enclosure structure Set horizontally and surround the mortise protruding part; the splicing surface guard plate of the mortise enclosure structure is set horizontally and surrounds the mortise concave part; the fastener joint plate is vertically fixed on the splicing surface guard plate; when two concrete prefabricated parts are spliced, the tenon protrudes part is inserted into the mortise recess, and the joint plate of the tenon enclosure structure fastener and the tenon enclosure structure fastener joint plate are fitted and locked; the tenon enclosure structure and the tenon enclosure structure are connected as one; the utility model can be used as a whole The dry connection method without welding on site realizes the splicing connection of large eccentrically compressed precast concrete columns.

Description

A prefabricated concrete column plug-in bolt splicing joint

technical field

The utility model relates to the technical field of civil engineering, in particular to an assembled concrete column plug-in bolt splicing node.

Background technique

Currently, there are many splicing joint forms for prefabricated concrete columns, which can be divided into two types according to the on-site splicing methods:

One type is the wet joint, that is, the splicing between precast concrete columns is through on-site post-cast concrete or cement-based grouting material, thereby forming a splicing joint of an assembled monolithic concrete structure. The existing mortise-column connections, slurry-anchor-column connections and traditional plug-in-column connections are all wet joints. In addition to the traditional plug-in column splicing joints, the structures using this type of joints require accurate alignment of the longitudinal reinforcement of the column members on site, and the strength of the concrete or cement-based grouting on site must be able to meet the mechanical requirements of the structure. On-site positioning and pouring quality limit the mechanical performance of such nodes. The traditional plug-in column connection solves the problem of difficult longitudinal reinforcement alignment, but due to the limited load that the traditional plug-in column splicing joint can bear, it is only suitable for axial compression and small eccentric compression members. Its performance cannot be exerted in compression components, so its application in engineering practice is limited, and its related research is also less.

The other type is the dry joint, which mainly uses on-site welding or bolt splicing to connect the upper and lower precast concrete columns into a whole prefabricated concrete structure. Cogged column connections, bolt connections, and welded connections are dry joints. Due to the use of on-site welding or high-strength bolt splicing, this type of joint is convenient for on-site construction and quality assurance, and will not cause environmental pollution problems, so it has strong practicability. However, in the existing dry joints, the welding of pre-embedded steel plates on site will cause certain damage to the precast column concrete, which limits its application; while the bolt splicing only relies on a few pre-embedded high-strength bolts to bear the bending moment, when the size and weight of the column When enlarged, the pre-embedded bolts may be pried up, so its scope of application is limited.

In order to improve the mechanical performance of the traditional plug-in column splicing joint and expand its application range, the utility model proposes an assembled concrete column plug-in bolt splicing node and its manufacturing and construction methods.

Contents of the invention

The utility model proposes a prefabricated concrete column plug-in bolt splicing joint, which can realize the splicing connection of large eccentric compressed prefabricated concrete columns in a dry connection mode without welding on site.

The utility model adopts the following technical solutions.

A prefabricated concrete column plug-in bolt splicing joint, used for splicing two concrete prefabricated parts, the splicing joint includes a tenon end structure set on the splicing surface of the concrete prefabricated part and a mortise end structure set on the splicing surface of another concrete prefabricated part end structure; the tenon end structure includes a tenon protrusion and a tenon enclosure; the tenon end structure includes a tenon depression and a tenon enclosure; the tenon protrusion matches the tenon depression; the tenon enclosure Both the mortise and mortise enclosure structures include splicing surface guards and fastener joint plates; the splicing surface guards of the tenon enclosure structure are arranged horizontally and surround the tenon protrusions; the splicing surface guards of the mortise enclosure structure are horizontally arranged and surround the mortise depressions; The fastener joint plate is vertically fixed on the splicing surface guard plate; when two concrete prefabricated parts are spliced together, the mortise protrusion is inserted into the mortise recess, and the mortise enclosure structure fastener joint plate and the mortise enclosure structure are fastened The joint plates of the parts are attached to each other and locked by the fasteners; the two splicing surface guard plates respectively arranged in the tenon enclosure structure and the tenon enclosure structure are connected into one.

The fasteners are high-strength bolts.

The mortise protrusion is a box-shaped steel column whose inner cavity is filled with concrete; the mortise recess is a hollow steel container embedded in the splicing surface and has an open top surface. The gaps between the depressions are filled with micro-expansion concrete; the joints of high-strength bolts are filled with micro-expansion concrete.

The two concrete prefabricated parts are two vertical prefabricated concrete columns with steel bars inside, and the two concrete columns are spliced according to the upper and lower positions; the two concrete columns are respectively an upper prefabricated column and a lower prefabricated column; The reinforcement includes the vertical upper main reinforcement and the horizontal upper stirrup; the upper main reinforcement is welded to the splicing surface guard plate of the tenon enclosure structure; the lower prefabricated column includes the vertical lower main reinforcement and the horizontal lower stirrup; The shank enclosure structure is provided with a shank reinforcing bar connecting plate; the shank reinforcing bar connecting plate is arranged horizontally and surrounds the ridge depression; the lower main reinforcement is welded at the shank reinforcing bar connecting plate.

The steel bar connecting plate at the shank part, the splicing surface guard plate of the mortise enclosure structure, and the splicing surface guard plate of the tenon enclosure structure are all in the shape of a circle, and the steel bar connection plate at the ridge part and the splicing surface guard plate of the ridge enclosure structure are parallel to each other and form a circle shape. The angle steels at the four corners of the plate are connected as a whole; stiffening ribs are provided at the connection between the shank reinforcing bar connecting plate and the lower main reinforcement and the outer wall of the shank depression; The outer wall of the shank part; the reinforced connecting plate of the shank part and the splicing surface guard plate of the shank enclosure structure are filled with concrete to form the outer concrete layer of the shank part.

The stiffener is a rib plate; the horizontal extension width of the stiffener is equal to the extension width of the shank reinforcing bar connecting plate; the height of the stiffening rib is greater than or equal to the extending width of the shank reinforcing bar connecting plate; the stiffening rib The thickness of the rib plate is the same as the thickness of the steel plate on the side wall of the depression.

When the upper prefabricated column and the lower prefabricated column are combined, there is a gap between the joint plate of the tenon enclosure structure fastener and the splicing surface guard plate of the mortise enclosure structure; Spaces are left between the face guards; construction gaps are left between the mortise protrusions and the mortise depressions.

The upper prefabricated column and the lower prefabricated column are combined at a height of about 1.2m from the floor or the ground.

The plate-shaped parts in the tenon-end structure arranged on the joint surface of the concrete prefabricated part and the tenon-end structure arranged on the joint surface of another concrete prefabricated part are all formed by steel plates.

The fabrication method of the prefabricated concrete column plug-in bolt splicing node includes the following steps;

A1. Prefabricate the mortise-end structure and the mortise-end structure in the factory or prefabrication site; weld the upper main reinforcement to the splicing surface guard plate of the tenon enclosure structure, and weld the lower main reinforcement to the mortise reinforcement connecting plate;

A2. After the welding is completed, tie the upper stirrup at the upper main reinforcement and support the formwork and then pour concrete to make the upper precast column; bind the lower stirrup at the lower main reinforcement and support the formwork and then pour concrete to make the lower precast column ;

A3. The upper prefabricated column and the lower prefabricated column are transported to the construction site, and after the mortise and tenon positioning and insertion, the tenon enclosure structure fastener joint plate and the mortise enclosure structure fastener joint plate are connected and locked with high-strength bolts. Finally, fill the gaps between the high-strength bolt joints and the construction gaps between the mortise and tenon joints with micro-expansion concrete to make the surface of the splicing joints smooth.

The prefabricated concrete column plug-in bolt splicing node described in the utility model is prefabricated in the prefabrication plant, and the on-site high-strength bolt splicing is convenient for positioning and simple assembly. Compared with the traditional plug-in column assembly node, it can be applied to large eccentric compression components middle.

In the utility model, after the mortise and tenon joint is performed, the joint plate of the tenon enclosure structure fastener and the joint plate of the mortise enclosure structure fastener are connected and locked with high-strength bolts, and finally the gap between the high-strength bolt connection and the tenon-tenon joint are fixed. The construction gap between the joints is filled with micro-expansion concrete to make the surface of the joint joints smooth; this design can effectively prevent water vapor from eroding the steel structure of the mortise-end structure and the mortise-end structure and the high-strength bolts connecting it, and is conducive to the synchronization of the service life of the joint and column components or close.

In the utility model, when the upper prefabricated column and the lower prefabricated column are put together, there is a construction gap between the tenon protrusion and the mortise recess; There is a certain positioning margin between the joint plates. Even if there is a slight error in the fixed point of the tenon enclosure structure fastener joint plate and the mortise enclosure structure fastener joint plate during production, it can still be fixed by the tenon protrusion and the mortise. The slight movement between the concave parts is used for correction, which facilitates the on-site positioning of the upper precast column; this design also improves the operability of on-site construction, making it easier for the upper precast column to be inserted into the lower precast column.

In the utility model, when the upper prefabricated column and the lower prefabricated column are joined together, there is an interval between the tenon enclosure structure fastener joint plate and the tenon enclosure structure splicing surface guard plate; the tenon enclosure structure fastener joint plate and the There is a gap between the splicing surface guard plates of the tenon enclosure structure; this design can make the axial pressure at the splicing joint mainly be borne by the pressure surface between the tenon protrusion and the tenon depression, and the high-strength bolts hardly bear the axial pressure , the setting of high-strength bolts is mainly used to bear the possible tension in the prefabricated column.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Accompanying drawing 1 is the three-dimensional schematic view of the utility model;

Accompanying drawing 2 is the front schematic view of the utility model;

Accompanying drawing 3 is the cross-section schematic diagram of splicing node of the present utility model from the top view (cut at the joint plate of the fastener);

Accompanying drawing 4 is another cross-section schematic diagram (cut at the stiffener) of the splicing node of the utility model in a top view;

Figure 5 is a schematic diagram of the upper prefabricated column.

Fig. 6 is a schematic diagram of the upper prefabricated tenon end structure.

Figure 7 is a schematic diagram of the lower prefabricated column.

Fig. 8 is a schematic diagram of the lower prefabricated shank end structure.

In the figure: 1-upper precast column; 2-lower precast column; 3-fastener; 4-micro-expansion concrete; 101-upper precast column concrete; 102-upper main reinforcement; 103-upper stirrup; 104-tenon inner concrete ;201-lower precast concrete; 202-lower main reinforcement; 203-lower stirrup; 204-tenon enclosure structure; 205-tenon outsourcing concrete layer; 10501-tenon protrusion; 10503-joint plate of fasteners of mortise enclosure structure; 20401-depression of mortise; 20402-splicing surface guard plate of mortise enclosure structure; 20403-joint plate of mortise reinforcement; 20404-angle steel; ; 20407-90 Envelope Fastener Engagement Plate.

Detailed ways

As shown in Figure 1-8, a prefabricated concrete column plug-in bolt splicing joint is used for the splicing of two concrete prefabricated parts. A mortise end structure of the splicing surface of a concrete prefabricated part; the mortise end structure includes a tenon protrusion 10501 and a tenon enclosure structure; the mortise end structure includes a mortise recess 20401 and a tenon enclosure structure 204; The mortise and mortise depressions are matched; the tenon enclosure structure and the mortise enclosure structure both include a splicing surface guard plate and a fastener joint plate; the splicing surface guard plate 10502 of the tenon enclosure structure is arranged horizontally and surrounds the tenon protrusion 10501; the mortise enclosure The structural splicing surface guard plate 20402 is arranged horizontally and surrounds the mortise recess 20401; the fastener joint plate is vertically fixed on the splicing surface guard plate; The enclosure structure fastener joint plate 10503 and the mortise enclosure structure fastener engagement plate 20407 are attached to each other and locked with the fastener 3; the two splicing surface guard plates respectively arranged on the mortise enclosure structure and the mortise enclosure structure are connected. as one.

The fasteners 3 are high-strength bolts.

The mortise protrusion is a box-shaped steel column whose inner cavity is filled with concrete (mortise inner concrete 104); the mortise depression is a hollow steel container embedded in the splicing surface with an open top surface. When two concrete prefabricated parts are spliced , The gap between the tenon protrusion 10501 and the tenon depression 10503 is filled with micro-expansion concrete; the high-strength bolt connection is filled with micro-expansion concrete 4 .

The two concrete prefabricated parts are two vertical prefabricated concrete columns with steel bars inside, and the two concrete columns are spliced according to the upper and lower positions; the two concrete columns are respectively the upper prefabricated column 1 and the lower prefabricated column 2; the upper prefabricated column The reinforcement in the column includes the vertical upper main reinforcement 102 and the horizontal upper stirrup 103; the upper main reinforcement 102 is welded to the joint surface guard plate 10502 of the tenon enclosure structure; the lower prefabricated column includes the vertical lower main reinforcement 202 and horizontal lower stirrups 203; the shank enclosure structure is provided with a shank steel bar connecting plate 20403; the shank steel bar connecting plate 20403 is horizontally arranged and surrounds the shank depression 10503; the lower main reinforcement 202 is welded to the shank steel bar Connecting board 20403.

The shank reinforcement connecting plate 20403, the mortise enclosure structure splicing surface guard plate 20402, and the mortise enclosure structure splicing surface guard plate 10502 are all in the shape of a loop, and the shank portion reinforcement connecting plate and the mortise enclosure structure splicing surface guard plate are parallel to each other. The angle steel 20404 at the four corners of the round plate is connected as a whole; the connection between the shank reinforcing bar connecting plate 20403 and the lower main rib 202 and the outer wall of the shank depression 10503 is provided with a stiffening rib 20406; the two ends of the stiffening rib 20406 are fixed by welding Concrete is filled between the steel bar connecting plate 20403 of the shank and the outer wall of the concave part 10503 of the shank; the steel bar connecting plate of the shank and the guard plate of the splicing surface of the enclosure structure are filled with concrete to form a concrete layer 205 surrounding the shank.

The stiffener is a rib plate; the horizontal extension width of the stiffener is equal to the extension width of the shank reinforcing bar connecting plate; the height of the stiffening rib is greater than or equal to the extending width of the shank reinforcing bar connecting plate; the stiffening rib The thickness of the rib plate is the same as the thickness of the steel plate on the side wall of the depression.

When the upper prefabricated column and the lower prefabricated column are combined, there is a gap between the joint plate of the tenon enclosure structure fastener and the splicing surface guard plate of the mortise enclosure structure; Spaces are left between the face guards; construction gaps are left between the mortise protrusions and the mortise depressions.

The upper prefabricated column and the lower prefabricated column are combined at a height of about 1.2m from the floor or the ground.

The plate-shaped parts in the tenon-end structure arranged on the joint surface of the concrete prefabricated part and the tenon-end structure arranged on the joint surface of another concrete prefabricated part are all formed by steel plates.

The fabrication method of the prefabricated concrete column plug-in bolt splicing node includes the following steps;

A1. Prefabricate the mortise-end structure and the mortise-end structure in the factory or prefabrication site; weld the upper main reinforcement to the splicing surface guard plate of the tenon enclosure structure, and weld the lower main reinforcement to the mortise reinforcement connecting plate;

A2. After the welding is completed, tie the upper stirrup at the upper main reinforcement and support the formwork and then pour concrete to make the upper precast column; bind the lower stirrup at the lower main reinforcement and support the formwork and then pour concrete to make the lower precast column ;

A3. The upper prefabricated column and the lower prefabricated column are transported to the construction site, and after the mortise and tenon positioning and insertion, the tenon enclosure structure fastener joint plate and the mortise enclosure structure fastener joint plate are connected and locked with high-strength bolts. Finally, fill the gaps between the high-strength bolt joints and the construction gaps between the mortise and tenon joints with micro-expansion concrete to make the surface of the splicing joints smooth.

In this example, horizontal connecting strips 20405 are provided between the four angle steels 20404 connecting the steel bar connecting plate at the shank part and the splicing surface guard plate of the shank enclosure structure for reinforcement.

In this example, when the upper precast column is manufactured, the upper main reinforcement is poured with upper precast column concrete 101 , and the tenon inner concrete 104 is poured at the protruding part of the tenon.

The utility model is not limited to the above-mentioned best embodiment mode, and anyone can draw other various forms of assembled concrete column plug-in bolt splicing nodes under the inspiration of the utility model; All changes and modifications should fall within the scope of the present utility model.

Claims (9)

1. a kind of assembly concrete post plug-in type bolt splices node, for the splicing of two precast concretes, its feature It is：The splicing node includes spelling located at the tenon end structure of precast concrete Mosaic face and located at another precast concrete The fourth of the twelve Earthly Branches end structure of junction；The tenon end structure includes tenon protuberance and tenon building enclosure；The fourth of the twelve Earthly Branches end structure includes fourth of the twelve Earthly Branches depressed part With fourth of the twelve Earthly Branches building enclosure；The tenon protuberance matches with fourth of the twelve Earthly Branches depressed part；The tenon building enclosure, fourth of the twelve Earthly Branches building enclosure include Mosaic face Backplate and fastener joint plate；Tenon building enclosure Mosaic face backplate is horizontally disposed and around tenon protuberance；Fourth of the twelve Earthly Branches building enclosure splicing Face backplate is horizontally disposed and around fourth of the twelve Earthly Branches depressed part；Fastener joint plate is vertically fixed on Mosaic face backplate；When two concrete When prefabricated component splices, in tenon protuberance insertion fourth of the twelve Earthly Branches depressed part, the tenon building enclosure fastener joint plate, the fastening of fourth of the twelve Earthly Branches building enclosure Part joint plate is bonded to each other and locked with fastener；Make to be divided into tenon building enclosure, fourth of the twelve Earthly Branches building enclosure two at Mosaic face backplate It is connected as a single entity.

A kind of 2. assembly concrete post plug-in type bolt splicing node according to claim 1, it is characterised in that：It is described Fastener is high-strength bolt.

A kind of 3. assembly concrete post plug-in type bolt splicing node according to claim 2, it is characterised in that：It is described Tenon protuberance is the box steel column of lumen loading concrete；The fourth of the twelve Earthly Branches depressed part in Mosaic face and opened top it is hollow Steel container, when two precast concretes splice, microdilatancy coagulation is filled with the gap between tenon protuberance, fourth of the twelve Earthly Branches depressed part Soil；High-strength bolt junction is filled with slightly expanded concrete.

A kind of 4. assembly concrete post plug-in type bolt splicing node according to claim 3, it is characterised in that：It is described Two precast concretes are the vertical precast concrete column that reinforcing bar is set in two, and two concrete columns are spelled by upper bottom Connect；Two concrete columns are respectively upper prefabricated post and lower prefabricated post；Reinforcing bar in the upper prefabricated post includes vertical upper cage bar With the upper stirrup of transverse direction；The upper cage bar is welded at the Mosaic face backplate of tenon building enclosure；The lower prefabricated post includes vertical Lower cage bar and horizontal lower stirrup；The fourth of the twelve Earthly Branches building enclosure is provided with fourth of the twelve Earthly Branches portion bar connecting plate；The fourth of the twelve Earthly Branches portion bar connecting plate water It is flat to set and around fourth of the twelve Earthly Branches depressed part；The lower cage bar is welded at fourth of the twelve Earthly Branches portion bar connecting plate.

A kind of 5. assembly concrete post plug-in type bolt splicing node according to claim 4, it is characterised in that：It is described Fourth of the twelve Earthly Branches portion bar connecting plate, fourth of the twelve Earthly Branches building enclosure Mosaic face backplate, tenon building enclosure Mosaic face backplate are in back-shaped, fourth of the twelve Earthly Branches portion bar connecting Plate, fourth of the twelve Earthly Branches building enclosure Mosaic face backplate are parallel to each other and are connected as a single entity with the angle steel at back-shaped plate corner；Fourth of the twelve Earthly Branches portion reinforcing bar connects Fishplate bar is provided with ribbed stiffener with lower cage bar, the junction of fourth of the twelve Earthly Branches depressed part outer wall；The ribbed stiffener both ends are welded to be fixed on fourth of the twelve Earthly Branches portion steel Muscle connecting plate and fourth of the twelve Earthly Branches depressed part outer wall；Fill concrete is formed between fourth of the twelve Earthly Branches portion bar connecting plate, fourth of the twelve Earthly Branches building enclosure Mosaic face backplate Fourth of the twelve Earthly Branches portion external wrapping concrete layer.

A kind of 6. assembly concrete post plug-in type bolt splicing node according to claim 5, it is characterised in that：It is described Ribbed stiffener is floor；The level of the ribbed stiffener is equal with the extension width of fourth of the twelve Earthly Branches portion bar connecting plate to extension width；It is described to add The height of strength rib is more than or equal to the extension width of fourth of the twelve Earthly Branches portion bar connecting plate；The floor thickness of the ribbed stiffener and fourth of the twelve Earthly Branches depressed part side Wall steel plate thickness is identical.

A kind of 7. assembly concrete post plug-in type bolt splicing node according to claim 6, it is characterised in that：When upper After prefabricated post and lower prefabricated post split, between being left between tenon building enclosure fastener joint plate and fourth of the twelve Earthly Branches building enclosure Mosaic face backplate Every；It is spaced between fourth of the twelve Earthly Branches building enclosure fastener joint plate and tenon building enclosure Mosaic face backplate；Tenon protuberance is recessed with the fourth of the twelve Earthly Branches Construction gap is left between portion.

A kind of 8. assembly concrete post plug-in type bolt splicing node according to claim 7, it is characterised in that：It is described Upper prefabricated post and lower prefabricated post carry out split at the height away from floor or ground 1.2m or so.

A kind of 9. assembly concrete post plug-in type bolt splicing node according to claim 7, it is characterised in that：It is described Tenon end structure located at precast concrete Mosaic face and the fourth of the twelve Earthly Branches end structure located at another precast concrete Mosaic face, its structure In panel-like member with steel plate forming.