CN218756957U - Quick mosaic structure of prefabricated bent cap and prefabricated pier - Google Patents

Abstract

The utility model relates to a quick mosaic structure of prefabricated bent cap and prefabricated pier, including bent cap, prefabricated pier and the cushion cap that from top to bottom sets gradually, between bent cap and the prefabricated pier, all be equipped with tenon fourth of the twelve earthly branches formula connection structure between prefabricated pier and the cushion cap, prefabricated pier upper portion, cushion cap upper portion are equipped with pre-buried little steel pipe and pre-buried grout bellows respectively, bent cap lower part, prefabricated pier lower part are equipped with and are used for extending to the interior exposed reinforcing bar that exposes of pre-buried grout bellows or pre-buried grout bellows. The utility model has reasonable design and convenient use, can directly play the role of restraining and positioning the precast pier and the bent cap during construction, prevent the pier from tilting during construction and improve the construction safety; the small pre-buried steel pipes on the top surface of the prefabricated pier and the pre-buried corrugated pipes on the top surface of the bearing platform can be directly poured from the top surface of the prefabricated pier and the top surface of the bearing platform during construction, sequential grouting is not needed, and the construction efficiency is improved; the plumpness of the ultrahigh-performance mortar material filled in the pipe can be directly checked by naked eyes, so that the construction quality controllability is improved.

Description

A rapid splicing structure of prefabricated cap beam and prefabricated bridge pier

technical field

The utility model relates to a fast assembling structure of a prefabricated cover beam and a thin-walled pier.

Background technique

Prefabricated assembled piers have been widely used in bridge engineering at home and abroad. Some bridges in my country often use assembled piers connected by grouting sleeves. During the construction period, each grouting sleeve needs to be grouted sequentially. The amount of grouting is large, and the construction efficiency is low, and the grouting density of the sleeves is closely related to the connection strength of the sleeves. However, the shielding effect of metal sleeves such as steel sleeves on electromagnetic signals makes it difficult to detect the grouting density of the sleeves, making it difficult to detect and control the grouting construction quality in the sleeves, and there are potential safety hazards. In addition, most of the joints are flat joints, and measures need to be taken to prevent sudden rollover of prefabricated piers, and opening and closing or misalignment will inevitably occur under the action of horizontal loads, which may lead to long-term failure of the steel bars at this position. Corroded by exposure to the atmosphere and rain. For the construction between the pier and the cap beam, the traditional construction method not only needs to set up supports, but also takes a long time for concrete curing, resulting in low construction efficiency.

Utility model content

The utility model improves the above-mentioned problems, that is, the technical problem to be solved by the utility model is to provide a fast splicing structure of prefabricated bridge piers and prefabricated bridge piers, which is convenient and efficient to use, and can directly assemble the prefabricated bridge piers and bridge piers during construction. To restrain and position, prevent rollover during construction, improve construction efficiency, controllability and safety of construction quality.

The utility model is constituted in such a way that it includes a cover beam, a prefabricated bridge pier and an abutment arranged sequentially from top to bottom, and mortise and tenon connections are arranged between the cover beam and the prefabricated pier, and between the prefabricated pier and the abutment. structure, the upper part of the prefabricated pier and the upper part of the cap are respectively equipped with pre-embedded small steel pipes and pre-embedded grouting bellows, and the lower part of the cover beam and the lower part of the prefabricated pier are provided with pre-embedded grouting bellows or pre-embedded grouting bellows exposed steel bars.

Further, the inside of the prefabricated pier and the cover beam are provided with grouting holes and grouting holes for pouring to fill the gaps between the mortise and tenon joint structures.

Further, the gap between the mortise and tenon joint structures, the inside of the pre-embedded small steel pipe and the inside of the pre-embedded grouting corrugated pipe are all provided with ultra-high performance mortar layers.

Further, the mortise and tenon connection structure includes a steel pipe concrete tenon arranged on the top of the prefabricated bridge pier or above the cap, and the bottom of the cap beam or the bottom of the prefabricated bridge pier is provided with a groove for matching with the steel pipe concrete tenon.

Further, short steel bars are welded on the outside of the steel pipe concrete tenon.

Further, the prefabricated bridge pier is provided with steel bars and stirrups inside the pier.

Further, the bottom of the cover beam and the upper part of the bearing platform are provided with ordinary concrete sections, the groove at the bottom of the cover beam is set in the middle of the ordinary concrete section at the bottom of the cover beam, and the tenons of the steel pipe concrete above the bearing platform are arranged on the bottom of the bearing platform. The middle part of the ordinary concrete section above the stage.

Further, carbon fiber cloth is arranged on the outside of the exposed steel bars.

Compared with the prior art, the utility model has the following beneficial effects:

(1) During assembly construction, the plumpness of the UHPM material filled in the pre-embedded small steel pipes on the top of the pier and the pre-embedded bellows on the top of the cap can be inspected directly with the naked eye, which improves the controllability of the construction quality. At the same time, compared with the traditional grouting sleeve connecting the prefabricated piers, the number of grouting is greatly reduced, which improves the construction efficiency and reduces the pressure of construction management;

(2) The prefabricated pier body stress reinforcement near the splicing joints is outsourced with CFRP, which can effectively protect the pier stress reinforcement, thereby improving the corrosion resistance of the pier;

(3) Welding short steel bars around the tenons of concrete filled steel tubes can provide gaps for the mortar, which is convenient for grouting and improves the bonding effect of the interface;

(4) The connection structure of grouting bellows is set around the cap platform, and the exposed steel bars at the bottom of the prefabricated pier are connected with the cap platform as a whole, which can play the role of energy-dissipating steel bars under earthquake action and reduce the displacement of the pier top. UHPM effectively bonds the interface between the concrete on the side wall of the bottom groove of the prefabricated pier and the concrete tenon on the top surface of the cap, which strengthens the connection between the prefabricated pier and the cap, and improves the integrity of the pier;

(5) The mortise-and-tenon connection structure formed by the tenon and tenon of the steel tube concrete on the top surface of the cap and the groove at the bottom of the prefabricated pier and the tenon and tenon connection formed by the tenon and tenon on the top surface of the prefabricated bridge pier and the groove at the bottom of the cap beam The structure, as well as the welding of short steel bars around the CFST tenons, can directly restrain and position the prefabricated bridge piers and cap beams during construction, prevent rollover during construction, and improve construction safety, and the CFST tenons can Eliminate the horizontal shear displacement that may occur at the joints of assembled piers, and can also improve the shear resistance of the joints.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model;

Fig. 2 is the second structural diagram of the utility model embodiment;

Fig. 3 is the plan view of the pier body of the prefabricated pier in the embodiment of the utility model;

Fig. 4 is a partially enlarged view of the splicing seam of the embodiment of the present invention;

In the figure: 1- grouting hole; 2- grouting hole; 3- steel pipe concrete tenon; 4- pre-embedded grouting corrugated pipe; 5- short steel bar; 6- pier body steel bar; Performance mortar (UHPM); 9-prefabricated bridge piers; 10-caps; 11-carbon fiber cloth; 12-capping beams; 13-embedded small steel pipes.

Detailed ways

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

Embodiment: As shown in Figures 1 to 4, in this embodiment, a prefabricated cap beam and a prefabricated bridge pier fast splicing structure is provided, including a cap beam 12, a prefabricated bridge pier 9 and a cap 10 arranged sequentially from top to bottom. Between the cover beam and the prefabricated bridge piers, and between the prefabricated bridge piers and the caps, there are mortise and tenon joint structures, and the upper part of the prefabricated bridge piers and the caps are respectively equipped with pre-embedded small steel pipes 13 and pre-embedded grouting corrugated pipes 4, The lower part of the cover beam and the lower part of the prefabricated pier are provided with exposed steel bars for extending into the pre-embedded grouting bellows or inside the pre-embedded grouting bellows.

The pre-embedded small steel pipes on the top of the prefabricated pier and the pre-embedded bellows on the top of the cap can be poured directly from the top of the prefabricated pier and the top of the cap during construction without sequential grouting. The pre-embedded small steel pipes on the top of the pier The fullness of the ultra-high-performance mortar (UHPM) material filled in the pre-embedded bellows on the top surface of the platform cap can be inspected directly with the naked eye, which improves the controllability of the construction quality. At the same time, compared with the traditional grouting sleeve connecting the prefabricated piers, the number of grouting is greatly reduced, which improves the construction efficiency and reduces the pressure of construction management.

In addition, grouting bellows are installed around the cap platform to connect the exposed steel bars at the bottom of the prefabricated pier with the cap platform as a whole, which can play the role of energy-dissipating steel bars under the action of earthquakes and reduce the displacement of the pier top. The interface between the concrete on the side wall of the groove at the bottom of the pier and the concrete tenon on the top of the cap is effectively bonded, which strengthens the connection between the prefabricated pier and the cap and improves the integrity of the pier.

In this embodiment, the inside of the prefabricated pier and the cover beam are provided with grouting holes and grouting holes for pouring to fill the gaps between the mortise and tenon joint structures; The gaps between the connecting structures are connected, and both the grouting hole and the grouting hole are connected to the inside of the prefabricated bridge pier or the outside of the cover beam.

The grouting hole inside the cover beam is set horizontally on the side of its groove, the grouting hole inside the cover beam is set vertically on the upper part of its groove; the grouting hole inside the prefabricated pier is set horizontally on its groove On the side of the prefabricated pier, the grout hole located inside the prefabricated pier is obliquely arranged on the upper part of the groove and extends to the outside of the side of the prefabricated pier.

In this embodiment, the gap between the mortise and tenon joint structures, the interior of the pre-embedded small steel pipe and the interior of the pre-embedded grouting corrugated pipe are all provided with ultra-high performance mortar layers. The ultra-high-performance mortar layer is formed by pouring ultra-high-performance mortar 8 into the pre-embedded small steel pipes and pre-embedded grouting corrugated pipes.

In this embodiment, the mortise-and-mortise connection structure includes the concrete-filled steel tube tenon 3 arranged on the top of the prefabricated bridge pier or above the cap, and the bottom of the cover beam or the bottom of the prefabricated bridge pier is provided with a groove for matching with the concrete-filled steel tube concrete tenon .

Short steel bars 5 are welded on the outer side of the above-mentioned steel pipe concrete tenon;

Welding short steel bars around the tenons of concrete filled steel tubes can provide gaps for the mortar, facilitate grouting, and improve the bonding effect of the interface. During construction, it can directly restrain and position prefabricated bridge piers and cap beams, preventing construction Rolling occurs during the period, which improves the construction safety, and the concrete tenon of the steel tube can eliminate the horizontal shear misalignment that may occur at the splicing joint of the assembled pier, and can also improve the shear resistance of the splicing joint.

In this embodiment, the pier body steel bar 6 and stirrup 7 are arranged inside the prefabricated bridge pier; the exposed steel bar is the part of the pier body steel bar extending downwards out of the prefabricated bridge pier.

The inside of the cover beam is provided with criss-cross steel bars, and the exposed steel bars are the part extending downward from the cover beam.

In this embodiment, the bottom of the cover beam and the upper part of the cap are provided with ordinary concrete sections, the groove at the bottom of the cover beam is set in the middle of the ordinary concrete section at the bottom of the cover beam, and the tenon of the steel pipe concrete above the cap is set In the middle of the ordinary concrete section located on the upper part of the cap.

The pre-embedded grouting bellows is located in the ordinary concrete section above the cap, and its upper end surface is flush with the upper surface of the ordinary concrete section, and a section of its lower end extends to the inside of the cap.

In this embodiment, a carbon fiber cloth 11 is provided outside the exposed steel bar. Preferably, the exposed steel bars of the prefabricated pier body near the splicing joints are covered with carbon fiber cloth (CFRP). This part of the exposed steel bars is stressed steel bars, which can effectively protect the stressed steel bars of the bridge piers, thereby improving the corrosion resistance of the bridge piers. ability.

In this embodiment, the construction steps are as follows:

(1) Fix the bearing platform 10, and fill the pre-embedded bellows 4 on the top surface of the bearing platform with ultra-high performance mortar;

(2) Insert the exposed steel bar on the prefabricated pier 9 into the pre-embedded grouting bellows 4 on the top of the cap 10, and insert the steel tube concrete tenon 3 on the top of the cap 10 into the groove at the bottom of the prefabricated pier 9;

(3) After the prefabricated pier 9 and the cap 10 are fixed, use ultra-high-performance mortar to grout from the grouting hole 1, and fill the gap between the concrete-filled steel tube tenon 3 and the prefabricated pier 9 until the ultra-high-performance mortar 8 overflow from the pulp outlet hole 2;

(4) After the assembly of the prefabricated pier 9 and the cap 10 is completed, the pre-embedded small steel pipe 13 on the top surface of the prefabricated pier 9 is filled with ultra-high performance mortar 8;

(5) Insert the exposed steel bar at the bottom of the cover beam 12 into the pre-embedded small steel pipe 13 on the top surface of the prefabricated bridge pier 9, and insert the steel pipe concrete tenon 3 on the top surface of the pre-embedded bridge pier 9 into the groove at the bottom of the cover beam 12;

(6) After the prefabricated pier 9 and the cover beam 12 are fixed, use ultra-high-performance mortar 8 to grout from the grouting hole 1 to fill the gap between the concrete-filled steel tube tenon 3 and the cover beam 12 until the ultra-high performance Mortar 8 overflows from slurry outlet hole 2.

Any technical solution disclosed in the above-mentioned utility model, unless otherwise stated, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred numerical range is only It is the value with obvious or representative technical effects among many implementable values. Since there are too many numerical values to list exhaustively, the utility model only discloses some numerical values to illustrate the technical solution of the utility model, and the numerical values listed above should not constitute limitations to the protection scope of the utility model.

If words such as "first" and "second" are used herein to define components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the components. Unless otherwise stated, the above words have no special meanings.

At the same time, if the above-mentioned utility model discloses or relates to parts or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as using a bolt or screw connection), or It can be understood as: non-detachable fixed connection (such as riveting, welding), of course, mutual fixed connection can also be replaced by an integrated structure (such as manufactured by casting process) (except that it is obviously impossible to use integral forming process).

In addition, unless otherwise stated, the terms used in any of the technical solutions disclosed in the present utility model to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them.

Any component provided by the utility model can be assembled from a plurality of individual components, and can also be a single component manufactured by an integral forming process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should understand that: still The specific implementation of the utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the utility model, all of them should be included in the scope of the technical solution claimed by the utility model.

Claims (8)

1. A prefabricated cap beam and prefabricated pier fast splicing structure, is characterized in that, comprises the cap girder, prefabricated pier and cap that are arranged successively from top to bottom, between described cap girder and prefabricated pier, prefabricated pier and cap There are mortise and tenon connection structures between them. The upper part of the prefabricated bridge pier and the upper part of the cap are respectively equipped with pre-embedded small steel pipes and pre-embedded grouting bellows. The lower part of the cover beam and the lower part of the prefabricated bridge pier are equipped with Grouted bellows or exposed reinforcement inside pre-embedded grouted bellows. 2. A prefabricated cap beam and prefabricated bridge pier quick splicing structure according to claim 1, characterized in that, the inside of the prefabricated bridge pier and the cap beam are provided with pouring holes for filling the gaps between the mortise and tenon joint structures. Grouting holes and grouting holes. 3. A prefabricated cover beam and prefabricated bridge pier rapid splicing structure according to claim 1, characterized in that the gap between the mortise and tenon joint structures, the inside of the pre-embedded small steel pipe and the inside of the pre-embedded grouting corrugated pipe are both Equipped with ultra-high performance mortar layer. 4. A prefabricated cap beam and prefabricated bridge pier quick splicing structure according to any one of claims 1-3, characterized in that the mortise and tenon connection structure includes a steel pipe concrete tenon arranged on the top of the prefabricated bridge pier or above the cap, The bottom of the cap beam or the bottom of the prefabricated pier is provided with a groove for matching with the tenon of the steel pipe concrete. 5. A prefabricated cap beam and prefabricated bridge pier rapid splicing structure according to claim 4, characterized in that short steel bars are welded on the outer side of the tenons of the steel pipe concrete. 6 . A prefabricated cap beam and prefabricated pier fast splicing structure according to claim 4 , characterized in that pier body steel bars and stirrups are provided inside the prefabricated pier. 7. A prefabricated cover beam and prefabricated pier quick splicing structure according to claim 4, characterized in that, the bottom of the cover beam and the upper part of the cap are provided with ordinary concrete sections, and the grooves at the bottom of the cover beam are arranged at The middle part of the ordinary concrete section at the bottom of the cover beam, and the steel pipe concrete tenon located above the cap platform is arranged in the middle part of the ordinary concrete section located at the upper part of the cap platform. 8. A prefabricated cap beam and prefabricated pier quick splicing structure according to claim 1, characterized in that carbon fiber cloth is arranged on the outside of the exposed steel bars.

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