CN210973675U

CN210973675U - Be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib

Info

Publication number: CN210973675U
Application number: CN201922036348.7U
Authority: CN
Inventors: 李铮; 张明金; 杨忠; 肖军; 向中富; 周霜林; 李庆达; 余佳昕
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-07-10
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib, including carrying and drawing ware, pulley mechanism, anchor mechanism, power unit, carry and draw the ware and install the arch rib department at the arched bridge, pulley mechanism is including connecting the first steel strand wires and a laborsaving assembly pulley of carrying and drawing the ware, and the laborsaving assembly pulley comprises a fixed pulley and a movable pulley and the second steel strand wires of connecting fixed pulley and movable pulley. Compared with the prior art, the utility model discloses a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib can effectively reduce the required tension force of lifting arch rib through the assembly pulley, simultaneously, with the help of the utility model discloses a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib can effectively reduce the hogging moment of arch rib for the live-load can be resisted to the reinforcement measure, can also make reinforced structure undertake a part of dead weight of arched bridge, improves the reinforcement effect of arched bridge greatly.

Description

Be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib

Technical Field

The utility model relates to a be used for restoration and the reinforced (rfd) equipment field of arched bridge arch rib, especially a be applied to arched bridge arch rib reinforced (rfd) hoisting accessory, mainly be applicable to and strengthen the bridge and consolidate the effect, make and consolidate or the repair measures can be more effective.

Background

In recent years, due to the demand of economic development, China builds a large number of arch bridges, particularly in western mountainous areas, because early arch bridge building technologies and the like are not mature, the design technology standards are low, the building time is long, the natural aging of additional materials is long, and the overload problem is serious day by day, so that a series of diseases of a plurality of arch bridges are caused. The design of the conventional arch bridge shows that in addition to a three-hinged arch, a large negative bending moment can occur at an arch rib, which is unfavorable for an arch bridge mainly under compression, and is also a reason for diseases easily occurring at the arch rib in the later period. Therefore, when repairing and reinforcing the arch springing, the main problem is to solve the large negative bending moment of the arch rib.

Therefore, there is a need for a new type of equipment that can eliminate some hogging moment of arch rib in advance and enhance the reinforcing and repairing effect of arch springing.

Disclosure of Invention

The utility model aims at providing a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib, the hogging moment numerical value of uninstallation arch rib to make the numerical value that the reinforcement measure can effectual reduction disease arch rib hogging moment, make the reinforcement effect more obvious.

In order to achieve the purpose, the utility model is implemented according to the following technical scheme:

a lifting device applied to arch bridge arch rib reinforcement comprises a puller, a pulley mechanism, an anchoring mechanism and a power mechanism, wherein the puller is installed at an arch rib of an arch bridge, the pulley mechanism comprises a first steel strand and a labor-saving pulley block which are connected with the puller, the labor-saving pulley block comprises a fixed pulley, a movable pulley and a second steel strand which is connected with the fixed pulley and the movable pulley, and the movable pulley and the fixed pulley are respectively composed of a square frame, a rotating shaft arranged between two side walls of the square frame, hooks arranged on the outer sides of the other two side walls of the square frame and a pulley fixed on the rotating shaft; the power mechanism comprises a winch and a motor for driving the winch to rotate; the square frame of fixed pulley fixes and keeps away from the arch rib outside department, the couple of the square frame one side of lifting jack through first steel strand wires connection movable pulley, the couple of the square frame opposite side of movable pulley is connected to the one end of second steel strand wires, the other end of second steel strand wires is fixed on the capstan winch with the pulley after-fixing of movable pulley on the pulley of fixed pulley in proper order, the couple that the square frame of fixed pulley is located the outside is connected with third steel strand wires, anchor mechanism is connected to the other end of third steel strand wires, anchor mechanism fixes and keeps away from arch rib outside department.

Further, the technical scheme of the utility model the foil gage that is used for detecting arch rib stress and meeting an emergency and the computer of the moment of flexure change volume of calculating the arch rib with the data of receiving the foil gage collection that is connected with the foil gage still including setting up on the arch rib, the computer is connected with the motor electricity and is used for opening of control motor and stops.

Preferably, the anchoring mechanism is a small tunnel anchor or a gravity anchor.

Preferably, the puller is a clip fixed on the arch rib or a steel box wrapped on the arch rib.

Compared with the prior art, the utility model discloses a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib can effectively reduce the required tension force of lifting arch rib through the assembly pulley, simultaneously, with the help of the utility model discloses a be applied to reinforced (rfd) hoisting accessory of arched bridge arch rib can effectively reduce the hogging moment of arch rib for the live-load can be resisted to the reinforcement measure, can also make reinforced structure undertake a part of dead weight of arched bridge, improves the reinforcement effect of arched bridge greatly.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view taken along line a-a of the movable and fixed pulleys.

Fig. 3 is a schematic view of the operation of the present invention.

Figure 4 is a flow chart of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

As shown in fig. 1 and 2, the lifting device applied to arch rib reinforcement of an arch bridge in the present embodiment includes a puller 1, a pulley mechanism, an anchoring mechanism 9, and a power mechanism, where the puller 1 is installed at an arch rib of the arch bridge, the puller 1 is a clip fixed on the arch rib or a steel box wrapped on the arch rib, and the puller 1 mainly disperses and transmits a tensile force of a first steel strand 3 to the arch rib, and compared with directly loading the arch rib, the puller 1 can effectively disperse the tensile force of the steel strand to prevent the first steel strand 3 from causing the arch rib to be damaged by local concrete when the first steel strand 3 is tensioned, and as shown in fig. 1, the steel box is adopted in the present embodiment; the pulley mechanism comprises a first steel strand 3 connected with the pulling device 1 and a labor-saving pulley block, the labor-saving pulley block consists of a fixed pulley 5, a movable pulley 4 and a second steel strand 10 connected with the fixed pulley 5 and the movable pulley 4, and the movable pulley 4 and the fixed pulley 5 consist of a square frame 41, a rotating shaft 42 arranged between two side walls of the square frame, hooks 44 arranged on the outer sides of the other two side walls of the square frame and a pulley 43 fixed on the rotating shaft; the power mechanism comprises a winch 6 and a motor 8 for driving the winch to rotate; the square frame 41 of the fixed pulley 5 can be fixed at the position far away from the outer side of the arch rib through a support (not shown in the figure), the lifting device 1 is connected with a hook 44 at one side of the square frame of the movable pulley 4 through the first steel strand 3, one end of the second steel strand 10 is connected with a hook 44 at the other side of the square frame of the movable pulley 4, the other end of the second steel strand 10 is sequentially wound on a pulley of the fixed pulley 5 and a pulley of the movable pulley 4 and then fixed on the winch 6, the hook positioned at the outer side of the square frame of the fixed pulley 5 is connected with a third steel strand 11, the other end of the third steel strand 11 is connected with an anchoring mechanism 9, and the anchoring mechanism 9 is fixed at the position far away from.

Further, the technical scheme of the utility model still including set up be used for detecting arch rib stress and the foil gage 2 of meeting an emergency and be connected with foil gage 2 with the data of receiving the foil gage collection and calculate the computer 7 of the moment of flexure change volume of arch rib, computer 7 is connected with 8 electricity of motor and is used for opening of control motor 8 and stops.

Preferably, the anchoring mechanism 9 is a small tunnel anchor or a gravity anchor, the selection of the anchoring type can be determined according to the type of a construction site, the small tunnel anchor and the gravity anchor can be both selected, the small tunnel anchor (drilling grouting anchoring) can be selected when the two sides are mountain bodies, the gravity anchor can be formed by selecting precast concrete blocks when the two sides are in flat ground, and the anchoring structure does not need to be very large due to the adoption of labor-saving pulley blocks.

The utility model discloses a working process and theory of operation are:

as shown in fig. 3 and 4, before the lifting device applied to arch rib reinforcement of the arch bridge of the present embodiment is arranged, first, it should be examined in the field to know the damage degree of the arch rib, determine the position of the damaged beam, the condition of the surrounding beam body and the environmental characteristics of the bridge site area, and then perform the related calculation and analysis to determine the displacement of the arch rib which needs to be pulled, thereby determining the installation position of the equipment, the magnitude of the pretensioning force, and the like. In addition, the installation position of the arch rib pulling device and the installation position of the anchorage are required to be determined, so that the installed equipment cannot cause the damage of the arch rib, and the problem of tensioning efficiency can be considered as much as possible when a pulley system is selected. The equipment can be installed after the installation position of the equipment is determined, after the hoisting device applied to arch bridge arch rib reinforcement in the embodiment is installed in place, the computer controls the motor to slowly stretch the second steel strand, meanwhile, the strain gauge starts to monitor strain of each part of the arch rib in real time, the strain gauge returns the strain to the computer in real time through the data acquisition box to be processed in time, when the computer calculates that the arch rib reaches a preset value, the computer controls the motor to stop stretching, all stretching processes are completed, the hogging moment of the arch rib is eliminated at the moment, and then subsequent arch rib reinforcement work is carried out.

The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.

Claims

1. A lifting device applied to arch bridge arch rib reinforcement is characterized by comprising a puller, a pulley mechanism, an anchoring mechanism and a power mechanism, wherein the puller is arranged at an arch rib of an arch bridge; the power mechanism comprises a winch and a motor for driving the winch to rotate; the square frame of fixed pulley fixes and keeps away from the arch rib outside department, the couple of the square frame one side of lifting jack through first steel strand wires connection movable pulley, the couple of the square frame opposite side of movable pulley is connected to the one end of second steel strand wires, the other end of second steel strand wires is fixed on the capstan winch with the pulley after-fixing of movable pulley on the pulley of fixed pulley in proper order, the couple that the square frame of fixed pulley is located the outside is connected with third steel strand wires, anchor mechanism is connected to the other end of third steel strand wires, anchor mechanism fixes and keeps away from arch rib outside department.

2. The hoisting device applied to arch bridge rib reinforcement of claim 1, wherein: the device also comprises a strain gauge arranged on the arch rib and used for detecting the stress and the strain of the arch rib, and a computer which is connected with the strain gauge and used for receiving data collected by the strain gauge and calculating the bending moment change amount of the arch rib, wherein the computer is electrically connected with the motor and used for controlling the start and stop of the motor.

3. The hoisting device applied to arch bridge rib reinforcement of claim 1, wherein: the anchoring mechanism adopts a small tunnel anchor or a gravity anchor.

4. The hoisting device applied to arch bridge rib reinforcement of claim 1, wherein: the lifting device is a clip fixed on the arch rib or a steel box wrapped on the arch rib.