CN218521603U - UHPC-PC combined bent cap without support construction - Google Patents

Abstract

The utility model discloses an exempt from support construction UHPC-PC combination bent cap, including the UHPC external mold, bottom fixedly connected with UHPC die block between the UHPC external mold, the equal fixedly connected with UHPC centre form in both sides at UHPC die block top, the ratio concrete has been pour to the inner chamber of UHPC external mold, the pre-buried lifting hook of top fixedly connected with of UHPC external mold. The utility model discloses a UHPC external mold, UHPC die block, UHPC centre form, ratio concrete and pre-buried lifting hook's cooperation are used, can lift by crane prefabricated UHPC inside and outside template to the regulation position, then cast in situ the concrete in the template inside, have avoided the support construction process flow, have reduced construction cost, have overcome the shortcoming that current prefabricated bent cap weight is big, the lifting difficulty is big, the position adjustment difficulty is big; in addition, the UHPC has better mechanical property, the inner and outer side dies of the UHPC can not be detached after the concrete is molded and hardened, the problems of poor tension property and poor durability of a common concrete cover beam are solved, the mechanical property and the economic benefit of the bridge are improved, and the cost is reduced.

Description

UHPC-PC combined bent cap without support construction

Technical Field

The utility model relates to a bridge technical field specifically is a exempt from support construction UHPC-PC combination bent cap.

Background

Big cantilever bent cap is one of the bent cap, it is famous because of having the both arms that horizontal extension formed, big cantilever bent cap is for the bent cap of vertical type, the bearing surface on its upper portion is bigger, can bear more superstructure, along with social and economic's rapid development, the vehicle type in the highway transportation of china is complicated day by day, the traffic volume also rises day by day, the width on road surface can be increased in the design of big cantilever bent cap, the jam of traffic is slowed down, but big cantilever bent cap the difficulty also is greatly higher than vertical type bent cap when the design man-hour, the major defect that current big cantilever bent cap exists does: because the quality is great, it is comparatively troublesome with location when the road pier installation cooperation, causes the efficiency of construction to reduce.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an exempt from support construction UHPC-PC combination bent cap possesses the advantage of the assembly of being convenient for, has solved current big cantilever bent cap because the quality is great, and it is comparatively troublesome with road pier installation location when cooperating, causes the problem that the efficiency of construction reduces.

In order to achieve the above object, the utility model provides a following technical scheme: a UHPC-PC combined cover beam free of support construction comprises UHPC outer molds, wherein a UHPC bottom mold is fixedly connected to the bottom between the UHPC outer molds, UHPC inner molds are fixedly connected to two sides of the top of the UHPC bottom mold, proportioned concrete is poured into an inner cavity of each UHPC outer mold, and embedded lifting hooks are fixedly connected to the top of each UHPC outer mold.

Preferably, the UHPC external mold comprises two side molds, a front mold and a rear mold, and two bottom bevel molds and a bottom mounting film.

Preferably, after the UHPC bottom die is connected with the bridge upright post, grouting slurry needs to be poured into an inner cavity of the UHPC bottom die.

Preferably, the proportioning concrete is proportioned on site and poured, and arrangement and binding of reinforcing steel bars are required before pouring.

Preferably, after the proportioned concrete is poured, film covering, watering and curing are required.

Preferably, the UHPC outer mold, the UHPC bottom mold and the UHPC inner mold are prefabricated by steel templates during preparation, the size, the thickness and the corner of the mold are effectively controlled during prefabrication, the precision of the mold is ensured, rubber hammers are used for knocking two sides of the steel template during pouring of the UHPC to ensure that air bubbles are fully removed, and film covering and maintenance are timely performed after pouring is finished.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a UHPC external mold, UHPC die block, UHPC centre form, ratio concrete and pre-buried lifting hook's cooperation are used, can lift by crane prefabricated UHPC inside and outside template to the regulation position, then cast in situ the concrete in the template inside, have avoided the support construction process flow, have reduced construction cost, have overcome the shortcoming that current prefabricated bent cap weight is big, the lifting difficulty is big, the position adjustment difficulty is big; in addition, the UHPC has better mechanical property, the inner side and the outer side of the UHPC can not be detached after the concrete is formed and hardened, the problems of poor tension performance and poor durability of a common concrete cover beam are solved, the mechanical property and the economic benefit of the bridge are improved, and the cost is reduced.

2. The utility model discloses a exempt from support construction UHPC-PC combination bent cap simple structure, the dead weight is lighter, the construction is simple and convenient, the durability can be good, and long service life, intensity is high, toughness is big, the sexual valence relative altitude, applicable in big cantilever bent cap design and construction, has very good popularization and application prospect in big cantilever bent cap design and construction.

3. The utility model discloses exempt from support construction UHPC-PC combination bent cap through the cast in situ concrete of hole department between the UHPC centre form, realize with the rigid connection of stand, improved the security coefficient of bridge.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the sectional structure of the present invention.

In the figure: 1. UHPC outer mold; 2. a UHPC bottom die; 3. a UHPC inner mold; 4. proportioning concrete; 5. and (6) embedding a lifting hook.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The components of the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known by the technical manual or by the conventional experimental method.

Referring to fig. 1-2, a UHPC-PC combined capping beam without scaffold construction comprises an UHPC outer mold 1, an UHPC outer mold 1 comprising two side molds, a front mold and a rear mold, two bottom inclined molds and a bottom installation film, wherein the bottom between the UHPC outer molds 1 is fixedly connected with an UHPC bottom mold 2, the UHPC bottom mold 2 is connected with a bridge upright post, a setting slurry needs to be poured into an inner cavity of the UHPC bottom mold 2, the UHPC inner mold 3, the UHPC outer mold 1, the UHPC bottom mold 2 and the UHPC inner mold 3 are fixedly connected with two sides of the top of the UHPC bottom mold 2 during preparation, steel templates are adopted for prefabrication, the size, the thickness and the corner of the mold are effectively controlled during prefabrication to ensure the mold precision, rubber hammers are used for knocking two sides of the steel templates during pouring the UHPC to ensure that air bubbles are sufficiently removed, after pouring is finished, film covering maintenance is carried out in time, matched concrete 4 is poured in an inner cavity of the UHPC outer mold 1, the matched concrete 4 is matched in site and poured, arrangement and binding of reinforcing steel bars are required before pouring, film covering watering maintenance is required after the matched concrete 4 is poured, the top of the UHPC outer mold 1 is fixedly connected with an embedded lifting hook 5, the UHPC outer mold 1, the UHPC bottom mold 2, the UHPC inner mold 3, the matched concrete 4 and the embedded lifting hook 5 are used in a matched mode, the UHPC inner and outer templates can be lifted to a specified position, and then concrete is poured in situ in the templates, so that a bracket construction process is avoided, the construction cost is reduced, and the defects that the existing prefabricated cover beam is large in weight, lifting difficulty and large in position adjusting difficulty are overcome; in addition, the UHPC has better mechanical property, the inner and outer side dies of the UHPC can not be dismantled after the concrete is formed and hardened, the problems of poor tension property and poor durability of a common concrete capping beam are solved, the mechanical property and the economic benefit of the bridge are improved, the cost is reduced, the bracket-free construction UHPC-PC combined capping beam has the advantages of simple structure, light self weight, simple and convenient construction, good durability, long service life, high strength, high toughness and high cost performance, can be suitable for the design and construction of a large cantilever capping beam, has very good popularization and application prospects in the design and construction of the large cantilever capping beam, and the bracket-free construction UHPC-PC combined capping beam realizes rigid connection with the stand column by casting concrete in situ at a hole between the UHPC inner dies 3, and improves the safety coefficient of the bridge.

When the UHPC box girder is used, the prefabricated UHPC inner and outer templates are lifted to an appointed position through the embedded lifting hooks 5, then concrete is poured between the inner template and the outer template in a pumping mode, after the pouring is finished, the surface of the concrete is covered with a film, water is sprayed for maintenance, and the upper box girder construction can be carried out after the maintenance is carried out to a specified age.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (2)

1. The utility model provides a exempt from support construction UHPC-PC combination bent cap, includes UHPC external mold (1), its characterized in that: the bottom between the UHPC outer molds (1) is fixedly connected with a UHPC bottom mold (2), two sides of the top of the UHPC bottom mold (2) are fixedly connected with UHPC inner molds (3), proportioned concrete (4) is poured in an inner cavity of the UHPC outer molds (1), and the top of the UHPC outer molds (1) is fixedly connected with embedded lifting hooks (5).

2. The UHPC-PC combined capping beam free of bracket construction as claimed in claim 1, wherein: the UHPC outer die (1) comprises two side dies, a front die and a rear die, two bottom inclined dies and a bottom mounting film.

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