CN109457613B - Bridge maintenance truss vehicle installation construction method - Google Patents
Bridge maintenance truss vehicle installation construction method Download PDFInfo
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- CN109457613B CN109457613B CN201811149518.6A CN201811149518A CN109457613B CN 109457613 B CN109457613 B CN 109457613B CN 201811149518 A CN201811149518 A CN 201811149518A CN 109457613 B CN109457613 B CN 109457613B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
- E01D19/106—Movable inspection or maintenance platforms, e.g. travelling scaffolding or vehicles specially designed to provide access to the undersides of bridges
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a bridge maintenance truss car installation construction method which is characterized in that in the maintenance truss car reconstruction process, an automobile crane is adopted to hoist the whole truss car to a position close to the bottom of a beam, then a chain block which is pre-installed is used for hoisting the truss car, hoisting stress points are gradually transferred from the automobile crane to the position of the chain block, the chain block is used for hoisting to an installation height, and a pre-installed driving box is butted with the hoisting truss car by a flange, so that truss car installation is completed. The invention can realize the reconstruction project of the bridge maintenance truss under the condition of limited height. The maintenance truss vehicle installation and construction method fully embodies the characteristics of scientific utilization, prior work efficiency, safety and reliability. The old truss car is fully utilized to install the driving box, the safety rope and the chain block, and personnel enter the new truss car to operate, so that the climbing problem is solved, and the personnel enter the new truss car channel.
Description
Technical Field
The invention belongs to the technical field of bridge engineering, and particularly relates to a bridge maintenance truss car installation and construction method.
Background
Along with the development of cities and the promotion of scientific and technical technologies, part of urban bridge maintenance truss cars reach the service life, and the functions and the technology of the truss cars cannot meet the current bridge maintenance requirements and need to be integrally replaced. In the previous bridge new construction period, most of maintenance truss cars are installed by hoisting equipment such as a winch and the like, the method can solve the problem that the truck crane at the height-limited area cannot be hoisted in place at one time, but the process has long construction period, high on-site preparation requirement and high safety risk. Therefore, a maintenance truss car installation method which is high in construction efficiency, meets site conditions and is low in safety risk needs to be researched.
Disclosure of Invention
The invention aims to provide a bridge maintenance truss car installation and construction method, which can solve the problems that the efficiency is slow, the safety is low under the traditional hoisting condition, and the suspension arm of a truck crane cannot be stretched and the hoisting height cannot be in place under the height limiting condition.
In order to achieve the above purpose, the solution adopted by the invention is as follows: a bridge maintenance truss car installation and construction method is characterized in that in the maintenance truss car reconstruction process, an automobile crane is adopted to hoist a new truss car to a position close to a beam bottom, an operator enters the new truss car from an old truss car, then a chain block which is pre-installed is used for hoisting the truss car, hoisting stress points are gradually transferred to the chain block from the automobile crane, the chain block is used for hoisting to an installation height, a pre-installed driving box is butted with the new truss car through flanges, and therefore installation of the new truss car is completed.
Further, the construction method specifically comprises the following steps:
A. the maintenance truss car enters the field for assembly, all parts are unloaded to the part to be hoisted, and a new truss car is assembled;
B. the driving boxes are in place, each truss vehicle comprises four driving boxes, the driving boxes are loaded into the truss vehicle tracks, old truss vehicles are adopted to haul the driving boxes to the installation positions, and the relative positions of the left driving box and the right driving box are adjusted during fixing so as to ensure that the distance between the left driving box and the right driving box meets the position of a truss vehicle connecting seat flange;
C. lifting the maintenance truss vehicle, wherein 6 sets of chain blocks are installed by the aid of an old truss vehicle, one set of chain block is installed outside each driving box and between two driving boxes on the same track, and a safety rope is hung on one side of each chain block and used for hanging safety belts by workers entering a new truss vehicle; hoisting a new truss vehicle to a position close to the bottom of the beam from the ground by using an automobile crane; binding a safety belt to a safety rope, enabling an operator to enter a new truss vehicle from an old truss vehicle, connecting 6 sets of hand chain blocks with pre-grown hanging points of the new truss vehicle, slowly adjusting the 6 sets of hand chain blocks to enable the truss vehicle to be inspected to be uniformly stressed, then synchronously lifting the hand chain blocks, pulling the hand chain blocks at a constant speed to enable the truss vehicle to be inspected to be horizontally lifted at a constant speed, loosening a vehicle crane hook after the hand chain blocks are completely stressed and safety is ensured, and retracting a suspension arm;
D. the driving boxes are fixed with the connecting seat flanges, after the new truss car is lifted to the driving box position, one of the driving boxes is fixed with the connecting seat flanges, and the other driving boxes adopt manual adjustment of the plane positions of the driving boxes to ensure butt joint with the connecting seat flanges;
E. and after the driving box and the new truss car connecting seat are connected through the flange and the bolts are screwed down, the chain blocks are detached one by one to complete the installation of the new truss car assembly.
Furthermore, 2 truck cranes are symmetrically arranged at two ends of the truss car, and each truck crane hook hoists one end of the truss car to hoist the truss car to a position close to the bottom of the beam.
The invention relates to a bridge maintenance truss vehicle installation and construction method, which fully embodies the characteristics of scientific utilization, prior work efficiency, safety and reliability. The old truss car is fully utilized to install the driving box, the safety rope and the chain block, and personnel enter the new truss car to operate, so that the climbing problem is solved, and the personnel enter the new truss car channel. Meanwhile, each truss car only needs 3 days from entering to finishing the installation, the field occupation time is reduced, and 2 large-scale hoisting equipment only needs one class, so that the economy is reflected. After the operator enters the truss vehicle, a safety belt which is installed in advance is bound, and the safety of the operator is ensured.
Drawings
Fig. 1 is a schematic view of a maintenance truss vehicle assembly of the present invention.
Fig. 2 is a schematic view of a double-crane lifting and hanging of the maintenance truss vehicle of the present invention.
FIG. 3 is a schematic view of the chain block lifting truss vehicle of the present invention
Fig. 4 is a schematic diagram of the chain block of the invention lifted in place and the flange bolts butted.
The figure includes: lifting platform 1, telescopic truss 2, portal frame 3, fixed truss 4, driving system 5, truss car 6, truck crane 7, truss car track 8, chain block 9, drive box 10.
Detailed Description
The installation and construction method of the bridge maintenance truss car is further explained according to the construction steps by combining the attached drawings and the examples.
1) Maintenance truss vehicle approach assembly
And after the maintenance truss vehicle is transported to the site by the flat car, unloading all parts to the part to be hoisted, and assembling by adopting a 25T truck crane.
All parts are installed according to codes before leaving the factory, and all interfaces are ensured to be matched.
2) Drive box in place
And each truss car is provided with four driving boxes in total, each driving box is 0.4t in weight, the driving box is hoisted to the bridge transition pier platform by a crane of 25t, the height of the driving box is 4 meters away from the installation track, the left driving box and the right driving box are installed into corresponding tracks by chain blocks, and the new truss car track utilizes the original truss car track.
The drive box adopts old purlin car haulage to mounted position, should adjust the relative position of left and right drive box when fixed to ensure that its interval satisfies purlin car connecting seat flange position.
3) Maintenance purlin car lifts by crane
When the new maintenance truss vehicle needs to be lifted to the position close to the beam bottom with the net height of 41 meters from the ground, when the new maintenance truss vehicle is about 3 meters away from the beam bottom, due to the limitations of a crane sling, a suspension arm top, a punching top limit and the like, the suspension arm cannot be extended, a lifting object cannot be lifted to the installation height, the lifting system needs to be converted, the weight of the equipment is gradually converted to 6 hand chain blocks of 10t, and the maintenance truss vehicle is lifted to the designed installation height through the hand chain blocks.
a. Preparation for hoisting
The truss car is assembled, the driving box is in place, and the truss car can enter the next procedure after passing through the rear part after being checked and accepted on site.
An old truss car is adopted to assist in installing chain blocks, and a set of 10t chain blocks are respectively installed outside each driving box and between two driving boxes on the same track; the middle 2 chain blocks are used for safety protection and are not stressed in the lifting process.
Meanwhile, a safety rope is hung on one side of each chain block and is used for hanging safety belts for operators entering a new truss vehicle.
And the field truck crane (2 50t truck cranes) enters the field, is checked, accepted and checked, finishes the field parking, and lifts the suspension arm to a certain position according to the turning radius and the rated lifting capacity required by the scheme.
b. Truss vehicle hoisting
Before the trussed girder vehicle is lifted, trial lifting is carried out, the height of the trial lifting is 30cm, and formal lifting can be carried out after the crane is checked to be stable, components are balanced and the binding is firm.
A special person is required to be arranged to command and slowly lift the truss car to a specified height, so that the balance of the truss car in the double-crane lifting process is ensured.
c. Hoisting point conversion
The hoisting point switching process is a major risk control process of the project and must be carried out according to the following procedures, and each process must be accessible to the next process after all people perform the process.
The old maintenance truss vehicle-mounted construction operator runs to the position of the new maintenance truss vehicle, and the operator passes through the special channels on the two maintenance truss vehicles to the new maintenance truss vehicle and ties the safety belt on the safety rope.
6 sets of 10t chain blocks are connected with the hoisting points of the inspection truss car which are pre-generated, so that the connection is reliable and firm.
And slowly adjusting 6 sets of chain blocks to ensure that the inspection truss vehicle is uniformly stressed, and then synchronously lifting the chain blocks.
And (4) slowly and uniformly pulling the chain block by personnel in the newly maintained truss vehicle, so that the inspection truss vehicle can horizontally lift at a uniform speed until the chain block is completely stressed and the safety is ensured, loosening the lifting hook of the truck crane, and retracting the lifting arm.
4) The driving box is fixed with the connecting seat flange
After the new maintenance truss vehicle is lifted to the driving box position, one of the driving boxes is fixed with the connecting seat flange;
the other driving boxes adopt manual adjustment of the plane positions of the driving boxes to ensure the butt joint with the connecting seat flange;
and after the driving box and the new maintenance truss car connecting seat are connected through the flange and the bolts are screwed down, the chain blocks are detached one by one to complete the installation of the inspection truss car assembly.
Due to the adoption of the scheme, the invention has the following characteristics:
under the condition of height limitation, lifting objects cannot be lifted in place due to the fact that a suspension arm of the truck crane cannot be stretched, and other lifting modes are needed for assisting lifting;
the old truss vehicle or other climbing facilities are used for assisting in installing the driving vehicle and the chain block;
each truss car only needs 3 days from entering to finishing the installation, the field occupation time is reduced, and 2 large-scale hoisting equipment only needs one class, so that the economy is reflected.
Claims (2)
1. A bridge maintenance truss car installation construction method is characterized in that in the maintenance truss car reconstruction process, an automobile crane is adopted to hoist a new truss car to a position close to a beam bottom, an operator enters the new truss car from an old truss car, then a chain block which is pre-installed is used for hoisting the new truss car, a hoisting stress point is gradually transferred to the chain block from the automobile crane, the chain block is used for hoisting to an installation height, a pre-installed driving box is butted with the new truss car through a flange, and the new truss car installation is completed;
the construction method specifically comprises the following steps:
A. assembling a new truss vehicle, unloading all parts to a part to be hoisted, and assembling the new truss vehicle;
B. the driving boxes are in place, each truss vehicle comprises four driving boxes, the driving boxes are loaded into the truss vehicle tracks, old truss vehicles are adopted to haul the driving boxes to the installation positions, and the relative positions of the left driving box and the right driving box are adjusted during fixing so as to ensure that the distance between the left driving box and the right driving box meets the position of a truss vehicle connecting seat flange;
C. the new truss car is hoisted, 6 sets of chain blocks are installed by the aid of the old truss car, one set of chain block is installed outside each driving box and between two driving boxes on the same track, and a safety rope is hung on one side of each chain block and used for hanging safety belts by workers entering the new truss car; hoisting a new truss vehicle to a position close to the bottom of the beam from the ground by using an automobile crane; binding a safety belt to a safety rope, enabling an operator to enter a new truss vehicle from an old truss vehicle, connecting 6 sets of hand chain blocks with preset lifting points of the new truss vehicle, slowly adjusting the 6 sets of hand chain blocks to enable the new truss vehicle to be uniformly stressed, then synchronously lifting the hand chain blocks, pulling the hand chain blocks at a constant speed to enable the new truss vehicle to be horizontally lifted at a constant speed, loosening a vehicle lifting hook after the hand chain blocks are completely stressed and safety is ensured, and retracting a lifting arm;
D. the driving boxes are fixed with the connecting seat flanges, after the new truss car is lifted to the driving box position, one of the driving boxes is fixed with the connecting seat flanges, and the other driving boxes adopt manual adjustment of the plane positions of the driving boxes to ensure butt joint with the connecting seat flanges;
E. and after the driving box and the new truss car connecting seat are connected through the flange and the bolts are screwed down, the chain blocks are detached one by one to complete the installation of the new truss car assembly.
2. A method of installing and constructing a bridge maintenance truss vehicle as claimed in claim 1 wherein 2 cranes are symmetrically disposed at opposite ends of the new truss vehicle, each crane hook lifting an end of the new truss vehicle to lift the new truss vehicle to a position adjacent the bottom of the beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149518.6A CN109457613B (en) | 2018-09-29 | 2018-09-29 | Bridge maintenance truss vehicle installation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149518.6A CN109457613B (en) | 2018-09-29 | 2018-09-29 | Bridge maintenance truss vehicle installation construction method |
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| Publication Number | Publication Date |
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| CN109457613A CN109457613A (en) | 2019-03-12 |
| CN109457613B true CN109457613B (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811149518.6A Active CN109457613B (en) | 2018-09-29 | 2018-09-29 | Bridge maintenance truss vehicle installation construction method |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3305384A1 (en) * | 1982-09-14 | 1984-03-15 | Alfons 7774 Deggenhausertal Moog | Device for inspecting the underside of bridges |
| CN103306199B (en) * | 2013-06-21 | 2015-07-08 | 重庆运安机电制造有限责任公司 | Mounting method of bottom width overhaul hanging basket of bridge |
| CN104358211B (en) * | 2014-10-16 | 2016-07-13 | 武汉二航路桥特种工程有限责任公司 | Inspection platform and using method thereof at the bottom of a kind of beam that may span across bridge pier and barrier post |
| CN106906756B (en) * | 2017-04-26 | 2018-08-21 | 武汉二航路桥特种工程有限责任公司 | Can Fast Installation remove maintenance operation platform and its construction method |
| CN107435296A (en) * | 2017-07-21 | 2017-12-05 | 中铁大桥局集团第六工程有限公司 | A kind of installation method of bridge inspection car, the bridge for setting up tool car and tool car |
| CN108487089B (en) * | 2018-04-03 | 2019-08-02 | 锦州铁道勘察设计院有限公司 | A method of railroad bridge is removed and set up on hillside |
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