CN101761031B - Continuous and perpendicular lifting apparatus for large segmental bridge floor beam - Google Patents

Abstract

The invention relates to a continuous vertical lifting device for a large-segment bridge deck girder. The components include a load-bearing bracket, a hydraulic jack lifting system, a cable reel and a guide cable frame device, and an operating platform. The load-bearing bracket is composed of the main beam at the head, the column, the tie rod, the diagonal brace and the connecting rod. There is an operation platform on the main beam at the head, and the jack lifting system and the corresponding cable tray and guide Cable rack device, the bottom of the load-bearing bracket is fixed and connected to the sharing beam fixed on the column with high-strength bolts. The device uses the permanent column as the foundation, which greatly reduces the amount of temporary structure, and the lifting bracket can be used as a device for recycling, creating greater economic benefits; and using the computer to control the synchronous lifting operation of the hydraulic jack, the lifting The components are steadily and continuously lifted into place, and the process control is precise and safe. And it can meet the vertical lifting construction needs of the large section of the entire span bridge deck beam in bridge construction.

Description

Continuous Vertical Lifting Device for Large Segment Bridge Deck Girder

technical field

The invention relates to a vertical lifting device for bridge deck girders in bridge construction, in particular to a continuous vertical lifting device installed on the top of pier columns. the

Background technique

At present, with the vigorous development of construction machinery and the continuous improvement of construction technology, there are many options for vertical lifting from the ground and high-altitude positioning in the installation and construction of large-scale steel structures. Large-scale steel structures such as truck cranes, crawler cranes, and gantry cranes can be used. Lifting equipment for lifting, walking, positioning and other operations. However, when the volume and tonnage of the lifted structure exceed a certain order of magnitude, especially in the vertical lifting operation of the entire span deck beam in bridge construction, due to the large plane size, volume and tonnage of the bridge deck beam structure, comprehensive consideration of economical and safety, the above-mentioned hoisting method using existing large-scale equipment is no longer applicable, and it is necessary to consider designing a hoisting equipment that meets the requirements of construction and is technically reliable for overall hoisting of large sections. the

Contents of the invention

The present invention provides a continuous vertical lifting device for large segment bridge deck girders based on column pier tops in order to meet the vertical lifting construction needs of large segments of whole-span bridge deck girders in bridge construction. the

In order to achieve the above object, the technical solution of the present invention is: a continuous vertical lifting device for large section deck girders, including a load-bearing bracket, a hydraulic jack lifting system, a cable reel and a guide wire frame device, an operating platform, and the load-bearing bracket is composed of a head Composed of main girders, columns, tie rods, diagonal braces and connecting rods, an operating platform is arranged on the main girder at the head, and a jack lifting system, a cable tray and a cable guide device corresponding to the arrangement of the jack are arranged on the operating platform, and the load-carrying The bottom of the bracket is fixed and connected to the sharing beam fixed on the column with high-strength bolts.

The contact bar and the operating platform are welded by H-shaped steel or channel steel. the

The hydraulic jack lifting system includes a hydraulic jack, which has logic control and position synchronous control functions, and realizes the smooth lifting and lowering of components and the computer-controlled hydraulic synchronous lifting system of remote control. the

The cable reel is made of steel pipe, and is connected with the legs installed on the top surface of the bracket through rollers; the guide cable frame is made of channel steel, and the steel strands passing through the guide cable frame are released from the cable reel and vertically enter the inner cavity of the jack. the

Safety net pockets are set on the cross bridge of the operating platform, skirting boards are set around the bottom of the platform, and the platform panel is made of patterned steel plates. the

The beneficial effects of the present invention are: the device uses the permanent column as the foundation, which greatly reduces the amount of temporary structure, and the lifting bracket can be used as a device, which can be recycled, creating greater economic benefits; and the computer controls the hydraulic pressure The synchronous lifting operation of the jack can smoothly and continuously lift the lifting member into place, and the process control is precise and safe. It can meet the vertical lifting construction needs of the large section of the entire span bridge deck beam in bridge construction. the

Description of drawings

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

Detailed ways

Below in conjunction with specific examples, the implementation manner of the patent of the present invention is further described. It should be understood that these embodiments are only used to illustrate the patent of the present invention and are not intended to limit the scope of the patent of the present invention. In addition, it should be understood that after reading the content taught by the patent of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application. the

As shown in FIG. 1 , the continuous vertical lifting device for large-segment bridge deck girders of the present invention includes a load-bearing bracket 1 ; a hydraulic jack lifting system 2 ; a cable reel and guide frame device 3 ; and an operating platform 4 . the

An operating platform 4 is provided on the main girder of the head of the bearing bracket 1, on which a jack lifting system 2 and a cable reel and guide frame device 3 corresponding to the layout of the jack are arranged, and the bottom of the bearing bracket 1 is fixed with high-strength bolts Connected to the sharing beam 5 fixed on the column 6. the

(1) Bearing bracket

The bearing bracket 1 is the core part of the whole lifting device. The entire support adopts an all-steel structure, a jack lifting system is arranged on the top surface, and the bottom is bolted and fixed on the sharing beam 6 with high-strength bolts M24. The main stress-bearing rods of the bearing bracket 1 are welded steel plates, and the connecting rods and the operating platform 4 are welded with H-shaped steel or channel steel. Each support frame is mainly composed of head girders, columns, tie rods, diagonal braces and connecting rods. the

(2) Hydraulic jack lifting system

The lifting system 2 mainly adopts the LSD200 hydraulic jack of Liuzhou OVM, and realizes synchronous lifting through computer control. The computer-controlled hydraulic synchronous lifting system consists of a control system (computer and sensors), a load-bearing system (steel strands and jacks), and a power system (hydraulic pump station). The computer synchronous control system has logic control and position synchronous control functions, which can realize the smooth lifting, lowering and remote control of components. the

Each set of lifting device is equipped with 2 sets of hydraulic jack lifting systems 2, and the synchronous lifting control is realized through a set of synchronous control systems. the

(3) Cable reel and guide frame device

On the operating platform 4 on the top surface of the support 1, two sets of cable reels and guide wire frame devices 3 are arranged, corresponding to the arrangement of the jacks. Through this set of devices, during the lifting and lowering process, the wire take-up and wire-releasing operations of the steel strand 7 are realized. The cable reel is made of steel pipe, and is connected with the legs installed on the top surface of the bracket through rollers; the guide cable frame is made of channel steel, fixed on the top surface of the bracket, and the position should correspond to the position of the jack to ensure that the steel strands can pass through the cable reel. After the wire is released, it enters the inner cavity of the jack vertically. the

(4) Operating platform

Arrange operating scaffolding platform 4, oil pump truck and other equipment on the bearing bracket 1. Safety net pockets are arranged on the cross bridge of the platform to avoid falling objects from high altitude. Skirting boards are arranged around the bottom of the platform. the

Taking the Minpu Bridge as an example, the planar size of a large section of the side-span steel structure is 43.6m×52.5m×11.7m and weighs about 960 tons. None of the existing hoisting equipment is suitable, and the continuous vertical lifting device of the large segment bridge deck girder of the present invention is used to effectively solve this problem. The specific steps are:

(1) The large segment bridge deck beam 8 to be lifted is located in the lifting position in the middle of the column 6;

(2) Install the bridge deck girder continuous vertical lifting device of the present invention on the tops of the four columns 6 . the

(3) The bridge deck girder is lifted into place through continuous lifting of four lifting devices and eight hydraulic jacks. the

Practice has proved that the invention is convenient in construction and greatly reduces the cost, and is worth recommending. the

Claims (5)

1. A continuous vertical lifting device for large section bridge deck girders, comprising a load-carrying support (1), a hydraulic jack lifting system (2), a cable reel and a guide wire frame device (3), and an operating platform (4), characterized in that , the load-bearing bracket (1) is composed of the main beam of the head, the column, the pull rod, the diagonal brace and the connecting rod, the main beam of the head is provided with an operating platform (4), and a hydraulic jack is arranged on the operating platform (4) to lift The system (2) and the corresponding cable tray and guide wire frame device (3) for the layout of the jack, and the bottom of the bearing bracket (1) are fixedly connected to the sharing beam (5) fixed on the column (6) with high-strength bolts. 2. The continuous vertical lifting device for large-segment bridge deck beams according to claim 1, characterized in that the connecting rod and the operating platform are welded by H-shaped steel or channel steel. 3. The continuous vertical lifting device for large segment bridge deck beams according to claim 1, characterized in that the hydraulic jack lifting system (2) includes a hydraulic jack, which has functions of logic control and position synchronization control, and realizes the stability of components. Computer-controlled hydraulic synchronous lifting system for lifting, lowering and remote control. 4. The continuous vertical lifting device for large segment bridge deck beams according to claim 1, characterized in that, the cable reels are made of steel pipes, and are connected to the legs installed on the top surface of the brackets through rollers, and the cable guides Made of channel steel, the steel strand (7) of the guide cable frame enters the jack cavity vertically after being unwound from the cable drum. 5. The continuous vertical lifting device for large segment bridge deck beams according to claim 1, characterized in that, a safety net is provided on the transverse bridge of the operating platform (4), skirting boards are arranged around the bottom of the platform, and the platform panel is made of patterned steel plate production.

Images