CN210458962U

CN210458962U - Pre-tensioning type bridge construction structure

Info

Publication number: CN210458962U
Application number: CN201921077383.7U
Authority: CN
Inventors: 卢彦; 李春峰; 杨书峰
Original assignee: Kaifeng Dafang Prestress Co ltd
Current assignee: Kaifeng Dafang Prestress Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-05
Anticipated expiration: 2029-07-11

Abstract

The utility model discloses a pre-tensioning bridge construction structure, which comprises a movable cross beam, prestressed tendons, a fixed pedestal, a pedestal jack and a tensioning device, the fixed pedestal comprises an upper cross beam, a lower cross beam, a pedestal front pier and a pedestal rear pier, two pedestal jacks are arranged between the pedestal front pier of the fixed pedestal and the movable cross beam, two ends of the platform-based jack are respectively fixed on one side of the front pier and one side of the movable cross beam of the platform, one end of each of the upper cross beam and the lower cross beam is connected with a releasing and expanding device, the other end of each releasing and expanding device is fixedly connected with the rear pier of the pedestal, one side of the movable cross beam is provided with a plurality of fixing nuts which fix the prestressed tendons and the movable cross beam, and a plurality of tool anchors are fixed on one side of the pedestal rear pier, and the other ends of the prestressed tendons are fixed in the tool anchors. The utility model discloses can effectively realize the stretch-draw of prestressing tendons and put a, reduce the loss of prestressing force, the construction is simple.

Description

Pre-tensioning type bridge construction structure

Technical Field

The utility model relates to a bridge construction technical field particularly, relates to a pretensioning formula bridge construction structures.

Background

The stress of the steel bar of the pretensioning method is built on a tire membrane or a steel mould, and the prestressed steel bar needs to be cut off when the prestressed steel bar is taken off from the tire membrane or the steel mould, namely the so-called releasing tension. Because the pretensioning method is to stretch the steel bars on the pedestal before the concrete is poured, the tensile stress established in the prestressed steel bars is the control stress, and the component retracts after the prestressed steel bars are released to cause the loss of the prestress.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pretensioning formula bridge construction structures to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a pre-tensioning bridge construction structure comprises a movable cross beam, a prestressed tendon, a fixed pedestal, a pedestal jack and a tensioning device, the fixed pedestal comprises an upper cross beam, a lower cross beam, a pedestal front pier and a pedestal rear pier, two pedestal jacks are arranged between the pedestal front pier of the fixed pedestal and the movable cross beam, two ends of the platform-based jack are respectively fixed on one side of the front pier and one side of the movable cross beam of the platform, one end of each of the upper cross beam and the lower cross beam is connected with a releasing and expanding device, the other end of each releasing and expanding device is fixedly connected with the rear pier of the pedestal, one side of the movable cross beam is provided with a plurality of fixing nuts which fix one end of the prestressed tendon with the movable cross beam, and a plurality of tool anchors are fixed on one side of the pedestal rear pier, and the other ends of the prestressed tendons are fixed in the tool anchors.

Furthermore, the prestressed tendons are formed by connecting a plurality of steel strands through connectors.

Further, the tool anchor adopts a small deformation anchor.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model provides a pretensioning formula bridge construction structure can effectively realize the stretch-draw of prestressing tendons and put and open, through the bench formula jack with put the both ends of a device simultaneously stretch-draw and reduce the loss of prestressing force, will through using the nut prestressing tendons fix respectively one side of mound before movable cross beam and the pedestal reduces the prestressing loss that prestressing loss relaxs and bring, prevents the prestressing loss that ground tackle deformation brought through using the little ground tackle of deformation, and the construction is simple, the maintenance of being convenient for.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a pre-tensioned bridge construction structure according to an embodiment of the present invention;

fig. 2 is a schematic view of a construction process of a pre-tensioned bridge construction structure according to an embodiment of the present invention.

Reference numerals:

1. a movable cross beam; 2. a pedestal jack; 3. a fixed pedestal; 4. prestressed tendons; 5. an upper cross beam; 6. a sheet releasing device; 7. a tool anchor; 8. a connector; 9. a nut; 10. a lower cross beam; 11. a pedestal rear pier; 12. pedestal front pier.

Detailed Description

The following, with reference to the drawings and the detailed description, further description of the present invention is made:

referring to fig. 1, a pre-tensioning bridge construction structure according to an embodiment of the present invention includes a movable beam 1, a tendon 4, a fixed pedestal 3, pedestal jacks 2, and a tensioning device 6, where the fixed pedestal 3 includes an upper beam 5, a lower beam 10, a pedestal front pier 12, and a pedestal rear pier 11, two pedestal jacks 2 are disposed between the pedestal front pier 12 of the fixed pedestal 3 and the movable beam 1, two ends of the pedestal jacks 2 are respectively fixed on one side of the pedestal front pier 12 and one side of the movable beam 1, the tensioning device 6 is connected to one end of each of the upper beam 5 and the lower beam 10, the other end of the tensioning device 6 is fixedly connected to the pedestal rear pier 11, a plurality of fixing nuts 9 are disposed on one side of the movable beam 1, the fixing nuts 9 fix one end of the tendon 4 to the movable beam 1, one side of pier 11 is fixed with a plurality of instrument anchors 7 behind the pedestal, the other end of prestressing tendons 4 is fixed in instrument anchor 7, prestressing tendons 4 is formed by connecting many steel strands through connector 8, instrument anchor 7 adopts the little ground tackle of deformation.

When specifically using, the constructor cleans fixed pedestal 3, props up the die block and lays prestressing tendons 4, uses connector 8 with prestressing tendons 4 to connect sufficient length, all uses nut 9 to fix prestressing tendons 4 in the one end of movable cross beam 1 and pedestal front pier 12, and prestressing tendons 4's the other end passes instrument anchor 7 is fixed, opens a seat formula jack 2 and puts a device 6, and adjustment initial stress is to prestressing tendons 4 both ends stretch-draw, and stretch-draw finishes the back formwork, installs the built-in fitting and waters the concrete, carries out the later stage maintenance preparation test block, puts a tensile cutting off prestressing tendons 4, pressure test block after the test block preparation finishes, and the preparation finishes and stacks prestressing tendons 4.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-tensioning bridge construction structure is characterized by comprising a movable cross beam (1), prestressed tendons (4), a fixed pedestal (3), pedestal type jacks (2) and a tensioning device (6), wherein the fixed pedestal (3) comprises an upper cross beam (5), a lower cross beam (10), a pedestal front pier (12) and a pedestal rear pier (11), two pedestal type jacks (2) are arranged between the pedestal front pier (12) of the fixed pedestal (3) and the movable cross beam (1), two ends of the pedestal type jacks (2) are respectively fixed on one sides of the pedestal front pier (12) and the movable cross beam (1), the tensioning device (6) is connected with one end of the upper cross beam (5) and one end of the lower cross beam (10), the other end of the tensioning device (6) is fixedly connected with the pedestal rear pier (11), a plurality of fixing nuts (9) are arranged on one side of the movable cross beam (1), the fixing nut (9) is used for fixing one end of the prestressed tendon (4) with the movable cross beam (1), a plurality of tool anchors (7) are fixed to one side of the pedestal rear pier (11), and the other end of the prestressed tendon (4) is fixed in the tool anchors (7).

2. A pre-tensioning bridge construction structure according to claim 1, characterized in that the tendons (4) are formed by connecting a plurality of steel strands through connectors (8).

3. A pre-tensioning bridge construction structure according to claim 1, characterized in that the tool anchor (7) is a deformation anchorage.