CN210288134U

CN210288134U - Flexible rings of UHPC prefabricated bridge ears

Info

Publication number: CN210288134U
Application number: CN201920952458.5U
Authority: CN
Inventors: 刘军; 欧可活
Original assignee: Guangdong Middle Road Protection Engineering Co Ltd
Current assignee: Guangdong Middle Road Protection Engineering Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-10
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a technical field of UHPC prefabricated bridge rings relates to a flexible rings of UHPC prefabricated bridge ears. The hoisting ring group is fixedly inserted into the bridge body, and the depth of the hoisting ring group inserted into the bridge body is not less than 25 cm; the hoisting ring set comprises a steel strand and a sleeve, the sleeve is inserted and embedded and fixed in the bridge body, one end of the steel strand is inserted into the bridge body and fixed at one end of the sleeve, and the other end of the steel strand is inserted into the bridge body and fixed at the other end of the sleeve. The utility model discloses utilize the flexible rings group that steel strand wires and sleeve combination formed, increased the area of contact between concrete and the rings group for frictional force between concrete and the rings group can increase, thereby overcome current rings structure and can not satisfy the defect of the demand of UHPC bridge segment section transport, reach the purpose of high-efficient quick transport UHPC bridge segment section.

Description

Flexible rings of UHPC prefabricated bridge ears

Technical Field

The utility model relates to a technical field of UHPC prefabricated bridge rings, more specifically say, relate to a flexible rings of UHPC prefabricated bridge ears.

Background

The traditional I-shaped beam for civil engineering generally needs to be provided with common longitudinal steel bars, common stirrups and common bent steel bars, and has high difficulty in preparing the bridge and long production time. Ultra-High Performance Concrete (UHPC) is a general name of a cement-based composite material which has over 150MPa of axial compressive strength, Ultra-High toughness and Ultra-long durability. In the construction of a prefabricated bridge, the bridge sections often need to be hoisted, shifted or installed through equipment such as a crane. The traditional bridge hoisting process adopts hoisting modes of pocket bottom falling, omega-shaped embedded hoisting rings or inverted U-shaped welded hoisting rings and the like. In the process of producing and constructing the ultra-high performance concrete (UHPC) precast beam, because the UHPC material has very high strength, the cross section of the bridge is mostly of a thin-wall structure, and common steel bars do not need to be laid in the bridge.

The condition of current prefabricated bridge rings: the existing prefabricated bridge can adopt a construction process of a bottom-mounted crane to hoist bridge sections, or the existing prefabricated bridge can adopt rigid hoisting rings such as omega-shaped embedded hoisting rings or inverted U-shaped welded hoisting rings.

The shortcoming/not enough of current precast beam rings: when the common concrete precast bridge section adopts a bottom-pocketed hoisting process for increasing the steel beam at the bottom, a bottom template for pouring needs to be moved, and the construction cost is increased to some extent. At the moment, part of the bottom die is required to be dismantled, which brings inconvenience to the prefabrication construction. The common concrete precast bridge segment is directly hoisted by using the bottom pocket of a steel wire rope without adding steel beams at the bottom. When the main material of the bridge is made of common concrete, the strength of the common concrete is relatively low, the cross section is designed to be a thick-wall structure, the hoisting process can be safely carried out, and the contact length between the rigid precast beam hoisting ring and the concrete is 8-10 CM. However, when the main material of the bridge is UHPC, the cross-sectional area can be greatly reduced due to the high strength of the material, the structure is mostly a thin-wall structure, and the steel wire rope at the bottom of the pocket can cause local instability and deformation of the upper flange plate or the lower flange plate of the bridge. The bottom-pocket hoisting process of directly using the steel wire rope without the bottom steel beam cannot be adopted. The hoisting ring is a common means for hoisting and using, and is pre-embedded in concrete. Because of the ultrahigh strength of UHPC materials, common steel bars are rarely arranged and not arranged in the bridge sections, the welding parts cannot be found by the traditional hoisting rings, and if the friction force between the hoisting rings and concrete is simply relied on, because the contact area between the concrete and the hoisting rings is small, tests show that the hoisting rings at least need to be inserted in the positions below 20CM in the bridge sections to bear the weight of the bridge sections, and simply speaking, the existing hoisting ring structure cannot meet the requirement of carrying the UHPC bridge sections. Therefore, how to arrange a new suspension ring structure enables the UHPC bridge section to be lifted and carried under the action of friction force between the suspension ring and concrete in the bridge section becomes a technical problem which is urgently needed to be solved in the current carrying of the UHPC bridge section.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a flexible rings of UHPC precast bridge ears to solve the defect that current rings structure can not satisfy the demand that UHPC bridge segment section carried.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a UHPC prefabricated bridge double-lug flexible hanging ring comprises a bridge body and a hanging ring group; the hoisting ring group is fixedly inserted into the bridge body, and the depth of the hoisting ring group inserted into the bridge body is not less than 25 cm; the hoisting ring set comprises a steel strand and a sleeve, the sleeve is inserted and embedded and fixed in the bridge body, one end of the steel strand is inserted into the bridge body and fixed at one end of the sleeve, and the other end of the steel strand is inserted into the bridge body and fixed at the other end of the sleeve.

As the preferred scheme of the utility model, the internal diameter of sleeve is 4-6 centimetres, steel strand wires plant and fix in the internal diameter of sleeve.

As the preferred scheme of the utility model, the sleeve is planted pre-buried fixed to the internal degree of depth of bridge and is not less than 25 centimetres.

As the utility model discloses a preferred scheme, the bridge body is including roof and web, the roof is fixed to be set up on the web, the suspension ring group plant fix in the roof.

As the preferred scheme of the utility model, the hanging ring group has two sets ofly, two sets of the vertical symmetry of web is laid along the hanging ring group.

As a preferred scheme of the utility model, the sleeve comprises a cylinder body and a bolt; the steel strand is inserted into the cylinder, and the bolt is inserted and fixed on the cylinder, so that the steel strand is fixed on the cylinder.

The utility model has the advantages that the utility model fixes the steel strand at the two ends of the sleeve to form a flexible annular structure, then the steel strand connecting sleeve is inserted and fixed in the bridge body, the flexible hanging ring group formed by combining the steel strand and the sleeve increases the contact area between the concrete and the hanging ring group, so that the friction force between the concrete and the hanging ring group can be increased, and the defect of small friction force caused by the small contact area between the concrete and the single rigid hanging ring in the traditional single rigid hanging ring is overcome; then the utility model discloses again through with flexible the ring group is planted to the internal degree of depth of bridge and is not less than 25 centimetres, in the frictional force between increase concrete and ring group, also further through the pre-buried degree of depth that increases ring group in order to improve frictional force for UHPC bridge segment section frictional force effect can be lifted by crane the transport down between ring group and bridge segment internal concrete, thereby overcome the defect that current rings structure can't satisfy the demand of UHPC bridge segment section transport, reach the purpose of high-efficient quick transport UHPC bridge segment section.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an overall vertical cross-sectional structural view of an embodiment of the present invention;

FIG. 2 is an overall top view block diagram of an embodiment of the present invention;

fig. 3 is a combined structure diagram of a steel strand and a sleeve according to an embodiment of the present invention;

fig. 4 is a sleeve structure diagram according to an embodiment of the present invention.

In the figure: 1-a bridge body; 2-steel strand wires; 3-a sleeve; 11-a top plate; 12-a web; 31-a barrel body; 32-bolt.

Detailed Description

The embodiment of the utility model provides a flexible rings of UHPC precast bridge ears.

Example 1: as shown in fig. 1-4, the embodiment of the utility model discloses a UHPC prefabricated bridge double-lug flexible hanging ring, which comprises a bridge body 1 and a hanging ring group; the hoisting ring group is inserted and fixed in the bridge body 1, and the depth of the hoisting ring group inserted into the bridge body 1 is not less than 25 cm; the hoisting ring group comprises a steel strand 2 and a sleeve 3, the sleeve 3 is inserted and embedded and fixed in the bridge body 1, one end of the steel strand 2 is inserted into the bridge body 1 and fixed at one end of the sleeve 3, and the other end of the steel strand 2 is inserted into the bridge body 1 and fixed at the other end of the sleeve 3.

In the embodiment of the present invention, one end of the steel strand 2 is inserted and fixed to one end of the sleeve 3 by welding, and the other end of the steel strand 2 is inserted and fixed to the other end of the sleeve 3 by welding, so that the steel strand 2 forms a flexible suspension ring set by being fixed to both ends of the sleeve 3, and then the flexible suspension ring set is inserted and fixed in the bridge body 1, and the sleeve 3 is inserted and fixed in the bridge body 1, the depth of inserting the lower end of the flexible suspension ring set into the bridge body 1 is not less than 25 cm, preferably, the depth of inserting the flexible suspension ring set into the bridge body 1 is 25 cm; and the height from the upper end of the flexible lifting ring group to the end face of the bridge body 1 is not less than 10cm, preferably, the height from the upper end of the flexible lifting ring group to the end face of the bridge body 1 is 10 cm.

The embodiment of the utility model provides a preparation process including: s1, firstly, building a bridge model of the bridge body 1 by using bridge boards; s2, inserting one end of the steel strand 2 and fixing the steel strand on one end of the sleeve 3 in a welding mode, inserting the other end of the steel strand 2 and fixing the other end of the sleeve 3 in a welding mode, and enabling the steel strand 2 to form a flexible suspension ring group by fixing the steel strand 2 on two ends of the sleeve 3; s3, then placing the lower end of the flexible suspension ring group into a position of the bridge model of the bridge body 1, which is not less than 25 cm away from the upper end face of the bridge body 1; and S4, finally pouring concrete into the bridge model for forming so as to complete the insertion and fixation of the flexible suspension ring group on the bridge body 1.

Obviously, the embodiment of the utility model provides a form flexible annular structure through fixing steel strand wires 2 at sleeve 3 both ends, then insert steel strand wires 2 with sleeve 3 and fix in the bridge body 1, utilize the suspension ring group that steel strand wires 2 and sleeve 3 combination formed, increased the area of contact between concrete and the suspension ring group for the frictional force between concrete and the suspension ring group can increase, overcome traditional single rigidity suspension ring because the area of contact between concrete and the single rigidity suspension ring is few and lead to the defect that frictional force is little; then the embodiment of the utility model provides a rethread will the ring group plants the degree of depth to the bridge body 1 in not less than 25 centimetres, when the frictional force between increase concrete and rings group, also further through the pre-buried degree of depth that increases ring group in order to improve frictional force for UHPC bridge segment section frictional force effect can be lifted by crane the transport down between rings group and bridge segment internal concrete, thereby overcome the defect that current rings structure can not satisfy the demand of UHPC bridge segment section transport, reach the purpose of high-efficient quick transport UHPC bridge segment section.

More specifically, the sleeve 3 has an inner diameter of 4-6 cm, and the steel strand 2 is inserted and fixed in the inner diameter of the sleeve 3. The depth of the sleeve 3 inserted and embedded into and fixed in the bridge body 1 is not less than 25 cm. Preferably, the inner diameter of the sleeve 3 is 6 cm, and the depth of the sleeve 3 inserted and embedded into the bridge body 1 is 25 cm.

The embodiment of the utility model provides an in, the distance is directly placed to sleeve 3 the degree of depth 25 centimetre department of the terminal surface of the bridge body 1, steel strand wires 2 plant fix in the internal diameter of sleeve 36 centimetres in order to form flexible rings group, directly through bury sleeve 3 of the 6 centimetre internal diameters in the bridge body 1 deeply, further increased the area of contact between concrete and rings group, make the frictional force between concrete and the rings group obtain further increase, effectively prevent that the frictional force undersize between concrete and the rings group from causing rings group cracked problem, thereby overcome the defect that current rings structure can not satisfy the demand of UHPC bridge segment transport yet, reach the high-efficient purpose of carrying UHPC bridge segment fast.

More specifically, the bridge body 1 comprises a top plate 11 and a web 12, the top plate 11 is fixedly arranged on the web 12, and the suspension ring set is inserted and fixed in the top plate 11. Two groups of the lifting ring groups are arranged longitudinally and symmetrically along the web 12. The sleeve 3 comprises a cylinder 31 and a bolt 32; the steel strand 2 is inserted into the cylinder 31, and the bolt 32 is inserted and fixed on the cylinder 31, so that the steel strand 2 is fixed on the cylinder 31. The embodiment of the utility model inserts the steel strand 2 into the inner diameter of the cylinder 31; then the bolt 32 is inserted into the inner diameter of the cylinder 31, so that the steel strand 2 and the bolt 32 are simultaneously embedded and fixed in the inner diameter of the cylinder 31, then the steel strand 2 and the bolt 32 are simultaneously embedded and fixed in the inner diameter of the cylinder 31 in a welding mode, and a double fixing mode that the steel strand 2 and the bolt 32 are simultaneously embedded and fixed in the inner diameter of the cylinder 31 is adopted, so that the phenomenon that the steel strand 2 and the cylinder 31 are broken and separated due to infirm welding of the steel strand 2 can be effectively avoided, the defect that the existing hoisting ring structure cannot meet the requirement of carrying UHPC bridge sections is overcome, and the purpose of efficiently and quickly carrying the UHPC bridge sections is achieved. Furthermore, the embodiment of the utility model provides a special rings equipment to prefabricated bridge of UHPC no muscle, and adopt flexible steel strand wires 2 that tensile strength is high as the main material of structure, contain 2 groups rings group, the whole equipment that every group rings comprise 2 steel strand wires 2 and sleeve 3, make full use of material properties such as the super high tensile strength of UHPC material and steel strand wires 2's the cohesive force that excels in and UHPC material, make this flexible rings device form simple, the manufacture is convenient, therefore, the carrier capacity and joint strength's requirement in the engineering hoist and mount can be satisfied completely, the problem of UHPC precast beam section hoist and mount has both been solved, the inside ordinary reinforcing bar that does not have of UHPC precast beam section has also been solved, can't provide the problem of rings tie point, the prefabricated beam section rings atress of UHPC is concentrated also solved, the problem of easy wearing and tearing. The problems of the lifting ring cost and the construction process of the UHPC precast beam section are solved, so that the defect that the existing lifting ring structure cannot meet the requirement of carrying the UHPC bridge section is overcome, and the aim of efficiently and quickly carrying the UHPC bridge section is fulfilled.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A UHPC prefabricated bridge double-lug flexible hanging ring is characterized by comprising a bridge body and a hanging ring group; the hoisting ring group is fixedly inserted into the bridge body, and the depth of the hoisting ring group inserted into the bridge body is not less than 25 cm; the hoisting ring set comprises a steel strand and a sleeve, the sleeve is inserted and embedded and fixed in the bridge body, one end of the steel strand is inserted into the bridge body and fixed at one end of the sleeve, and the other end of the steel strand is inserted into the bridge body and fixed at the other end of the sleeve.

2. The UHPC precast bridge binaural flexible hanging ring according to claim 1, wherein the inner diameter of the sleeve is 4-6 cm, and the steel strands are inserted and fixed in the inner diameter of the sleeve.

3. The UHPC precast bridge binaural flexible hanging ring as claimed in claim 2, wherein the sleeve is inserted and embedded and fixed into the bridge body to a depth of not less than 25 cm.

4. The UHPC precast bridge binaural flexible hanging ring according to claim 3, wherein the bridge body comprises a top plate and a web plate, the top plate is fixedly arranged on the web plate, and the hanging ring group is fixedly inserted into the top plate.

5. The UHPC precast bridge double-lug flexible lifting ring according to claim 4, wherein the lifting ring groups are arranged in two groups, and the two groups of lifting ring groups are symmetrically arranged along the longitudinal direction of the web plate.

6. The UHPC precast bridge double-lug flexible lifting ring according to claim 5, wherein the sleeve comprises a cylinder body and a bolt; the steel strand is inserted into the cylinder, and the bolt is inserted and fixed on the cylinder, so that the steel strand is fixed on the cylinder.