CN108277994B - Method for quickly dismantling safety protection shed of overhead high-speed rail operation line - Google Patents
Method for quickly dismantling safety protection shed of overhead high-speed rail operation line Download PDFInfo
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- CN108277994B CN108277994B CN201810229413.5A CN201810229413A CN108277994B CN 108277994 B CN108277994 B CN 108277994B CN 201810229413 A CN201810229413 A CN 201810229413A CN 108277994 B CN108277994 B CN 108277994B
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- safety protection
- protection shed
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
- E04G21/3252—Protections, e.g. cover, caps, against impaling on starter reinforcement bars
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- Architecture (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention relates to a method for quickly dismantling a safety protection shed of an overhead high-speed rail operation line. When the transverse girder is dismantled, the cantilever crane on the quick dismantling device is utilized to horizontally move the girder to a reserved operating platform close to the station house for dismantling. The invention solves the problem that the crane cannot be used due to insufficient space of some practical construction sites, and has simple operation and high construction efficiency.
Description
Technical Field
The invention relates to a safety protection shed dismantling device, in particular to a method for quickly dismantling a safety protection shed of an overhead high-speed rail operation line.
Background
Due to the increase of railway lines, a situation that a new building is built by crossing an existing line from top to bottom is inevitable, which is particularly common at a station where a plurality of lines meet, and a safety protection shed is usually arranged on the existing line. The safety protection shed is arranged, so that the influence of adjacent or overhead engineering construction on the normal operation of the existing line can be avoided. The current safety protection canopy construction about crossing the existing circuit of normal operation is mainly to the installation construction, but the safety protection canopy must be demolishd as interim structure after the engineering construction. The traditional safety protection shed is dismantled and is constructed by utilizing a truck crane or a tower crane, but the crane can interfere the operation safety of the existing line, and the dismantling of the station safety protection shed is limited by the space of a construction site, so that a large crane cannot enter the site for auxiliary construction, and the dismantling work of the safety protection shed is greatly influenced.
Based on this, it is very important to find a device and a method for quickly dismantling a safety protection shed of an overhead high-speed rail operation line.
Disclosure of Invention
The invention aims to overcome the defects and provide a device for quickly dismantling the safety protection shed striding over the normal operating existing line.
The purpose of the invention is realized by the following technical scheme:
the method for quickly dismantling the safety protection shed of the overhead high-speed rail operation line is characterized by comprising the following steps of:
1) the safety protection shed of the upper-span high-speed rail operation line is quickly disassembled to make and install the device: firstly, manufacturing a frame, wherein the frame is formed by welding a rail tooling jig frame main beam 3 and a rail tooling jig frame column 5; support rods 6 are arranged between the upper and lower layer track tool jig frame main beams 3, and four frames are manufactured; welding four frames through a rail tooling jig frame main beam 3; the method comprises the following steps that a cantilever crane 2 is arranged beside a track tooling jig column 5 and is fixed with a track tooling jig main beam 3 through a connecting steel plate, the cantilever crane 2 consists of a cantilever crane upright column 14, a cantilever crane beam 15, a double-lifting hook 7 and a chain block 8, the double-lifting hook 7 is arranged, the cantilever crane upright column 14 is provided with the cantilever crane beam 15 at the top end, and the double-lifting hook 7 is arranged on the cantilever crane beam 15; arranging track tooling jig frame secondary beams 4 between the top layer transverse track tooling jig frame main beams 3 at intervals, and then laying a roof profiled steel sheet as an operating platform 9; a pulley 10 and a horizontal sliding limiting device 12 are arranged on a bottom layer track tooling jig frame main beam 3; a counterweight 11 is arranged on the quick dismounting device at a position close to the elevation of the platform plane, and the whole framework is eccentrically arranged in the platform direction; a temporary track 18 is arranged on the platform 17 and forms a three-pivot with the two pulleys 10 at the bottom of the device; after the construction of the quick dismantling device is completed on the same day, the quick dismantling device is fixed by a guy rope 13, and an anchoring point of the guy rope 13 is arranged at the bottom of a round steel column of the platform;
2) dismantling the roof panel of the safety protection shed: after the quick dismantling device for the safety protection shed of the upper-span high-speed rail operation line is installed and tested, the roof panel of the safety protection shed 16 is dismantled, the roof panel is dismantled towards the station house from the edge far away from the station house, and a plurality of spans are reserved to be used as a temporary operation platform;
3) and then, dismantling the longitudinal secondary beam: the protective shed is removed from the end far away from the station house along the line direction, and is sequentially removed towards the station house; the vertical track direction is realized, and the middle part is dismantled to the two side directions;
4) and then dismantling the transverse main steel beam: dismantling operation is carried out by utilizing a safe hanging basket and a quick dismantling device, and the dismantling sequence is opposite to that of a roof panel or a secondary beam;
5) and then dismantling the upright post of the safety protection shed: hoisting the upright column by using the cantilever crane 2, controlling the position of the upright column by using the guy rope, cutting off the bottom of the upright column, and hoisting the upright column to the outer side of the safety protection shed for disassembly;
6) and finally, dismantling a reserved operating platform: and the rest roof panels, columns and beams are dismantled in the same way, and finally the whole dismantling work of the safety protection shed is finished.
The cantilever crane 2 can be vertically lifted and lowered, and can also rotate by 360 degrees; the double-lifting hook 7 has the functions of an operation lifting hook, a guide hook and a safety function respectively.
Further, the pulley 10 can slide on the rail, and horizontal sliding limiting devices 12 are arranged on two sides of the pulley 10 to prevent the quick dismantling device from derailing in the sliding process; in addition, a temporary rail 18 is arranged on the platform 17, and forms three supporting points with the two pulleys 10 at the bottom of the rail tooling jig 1, so that the stability of the device is ensured.
The second floor position of the bottom of the quick dismantling device is provided with a counterweight 11 close to the platform plane elevation position, the whole framework is arranged eccentrically in the platform direction, and the self stability of the quick dismantling device can be further improved.
After the device is dismantled fast to the safe protection canopy of high-speed railway operation line of strideing on, the construction of that day is accomplished, need fix with guy rope 13, guy rope 13 anchor point establishes at the round steel post bottom of platform. Two guy cables 13 are respectively pulled by each quick dismounting device at the side close to the station and are tensioned by a chain block 8.
The invention has the following characteristics and beneficial effects:
the device for quickly dismantling the safety protection shed of the upper-span high-speed rail operation line can solve the problems that the space of a construction site is insufficient in some time and a crane cannot be used.
The cantilever crane provided by the invention can be stretched up and down and rotated by 360 degrees, and when the transverse main beam is dismantled, the main beam can be transferred to the reserved operating platform for dismantling by using the cantilever crane.
The fast dismounting device is adopted to dismount the safety protection shed spanning the high-speed rail operation line, the operation is simple, and the construction efficiency is high.
Drawings
FIG. 1 is a view of a quick demolition apparatus demolishing a secondary beam station;
FIG. 2 is a top view of the quick release apparatus;
FIG. 3 is a front view of the quick release device;
FIG. 4 is a three-dimensional schematic view of the quick release apparatus;
FIG. 5 is a schematic view of a quick release device boom;
FIG. 6 is a schematic view of a horizontal slip limiting device of the quick release device;
fig. 7 is a side view of the quick release device.
In the figure, 2 — a cantilever crane; 3, a main beam of a track tooling jig frame; 4-track tooling jig secondary beam, 5-track tooling jig column and 6-support rod; 7-double hook; 8, pulling a chain block; 9-an operation platform; 10-a pulley; 11-counterweight; 12-a horizontal slip limiting device; 13-guy rope; 14-cantilever crane upright column; 15-cantilever hanging beam; 16-safety protection shed; 17-a station; 18-temporary track.
The specific implementation mode is as follows:
first, a frame as shown in fig. 3 is fabricated, 4 frames are fabricated in total, and the frame is formed by welding a rail fixture jig main beam 3 and a rail fixture jig column 5. Frame bottom width 3200mm, the top is 4000mm wide, each floor height is 1120mm, 1900mm, 2180mm and 1620mm, rail frock bed-jig post 5 total height 8720mm, all adopt the welding of H shaped steel to form, the size is HW200x200x8x12, last several floors set up bracing piece 6 in 3 mid points of horizontal rail frock bed-jig girder, bracing piece 6 adopts the circular steel tube, the specification is phi 89x4, together below, the penultimate floor sets up the bracing piece in 3200mm department, the bottom sets up the bracing piece in 1007mm, 1600mm and 2194mm department respectively.
Welding and connecting 4 frames manufactured in the last step through longitudinal rail tooling jig frame main beams 3 at intervals of 3000mm for three spans of 9000 mm; and a support rod is arranged at the 1, 3-span midpoint, so that the structure shown in fig. 7 is obtained.
The cantilever crane 2 is arranged on the side of the rail tooling jig column 5 of the formed structure, as shown in fig. 5, the cantilever crane upright post 14 is made of a round steel pipe and has the size of phi 245x12, and the cantilever crane beam 15 is a rectangular pipe and has the specification of 300x200x10x 10. The length of the cantilever crane is 2m, the cantilever crane can vertically lift 0-1.6m and rotate 360 degrees, the front end of a cantilever crane beam 15 is provided with two lifting hooks 7, one lifting hook is used as an operation lifting hook, the other lifting hook is used as a guide hook and a safety catch, and the cantilever crane is provided with a 2T chain block 8.
Next, a track tooling jig secondary beam 4 is arranged at the middle of each span of the three spans of the formed structure, the track tooling jig secondary beam 4 is made of H-shaped steel, the section size is slightly smaller than that of the track tooling jig main beam 3, and then a roof profiled steel plate is laid on the top surface of the structure to serve as an operating platform 9, as shown in fig. 2.
A pulley 10 and a horizontal sliding limiting device 12 are installed at the bottom of the structure, a counterweight 11 is arranged on the quick dismounting device at a position close to the elevation of the platform plane, and the whole structure is in eccentric arrangement in the platform direction; a temporary track 18 is arranged on the platform 17 and forms a three-pivot with the two pulleys 10 at the bottom of the device; after the construction of the quick dismantling device is completed on the same day, the quick dismantling device is fixed by a guy rope 13, and an anchoring point of the guy rope 13 is arranged at the bottom of a round steel column of the platform; finally, the device for quickly dismantling the safety protection shed of the upper-span high-speed rail operation line shown in fig. 4 is obtained.
The method for dismantling the safety protection shed of the overhead high-speed rail operation line comprises the following steps:
the first step of the dismantling work is to dismantle the roof board of the safety protection shed 16 from the edge far away from the station house to the direction of the station house, and a plurality of reserved spans can be used as a temporary operating platform. Before the roof profiled steel sheet is dismantled, the stud is firstly dismantled, and the stud is not dismantled in the part without dismantling the roof panel, so that the safety of the off-spot traveling is ensured. And (3) cutting off the span center of a single roof profiled steel sheet when the single roof profiled steel sheet is dismantled, dragging and moving the roof plates of the 1 st and 2 nd blocks after being divided to the rapid dismantling devices on two sides respectively by manpower, and finally decomposing the roof plates on the rapid dismantling devices and transferring the roof plates out of the field.
And then, dismantling a secondary beam of the safety protection shed, wherein the secondary beam is connected with the main beam in a spot welding mode, the dismantling construction is mainly carried out by adopting an acetylene oxygen cutting gun, and the station position of the quick dismantling device is shown in figure 1. Adopt the oxygen acetylene cutting torch to cut secondary beam and girder hookup location department, demolish from striding towards both sides when safety protection canopy secondary beam is demolishd, utilize the quick demolishment device and the secondary beam that has not yet demolishd as the strong point, adopt plank and template to set up interim operation platform between safety protection canopy secondary beam, as the passageway of carrying to the platform truck, after every demolishs a secondary beam, carry the secondary beam from protection canopy both sides to quick demolishment device operation platform 9, operation platform 9 is toward the direction of demolishment back translation one secondary beam interval simultaneously, until each remaining secondary beam in both sides, keep the secondary beam in both sides steel column outside, ensure that the girder connection is firm. After the secondary beam is disassembled on the operation platform of the tooling jig frame, the secondary beam is hung to the platform by using a cantilever crane 2, and the structure of the cantilever crane is shown in figure 5.
Then the transverse main steel beam is dismantled, the quick dismantling device is moved to the two ends of the steel beam to be dismantled by using the pulley 10 at the bottom, and horizontal sliding limiting devices 12 are arranged on the two sides of the pulley 10, as shown in fig. 6, so as to avoid derailment of the pulley. The main steel beams of the single protection shed are sequentially dismantled towards the outside close to the station house in the dismantling sequence, which is opposite to the integral sequence of the roof boards and the secondary beams. Before a single main beam is dismantled, two secondary beams for stabilizing the structure are dismantled to a quick dismantling device, the length of an upper flange plate of the steel beam is cut by 20cm, two holes are respectively punched on a web plate at each end to serve as lifting lugs, the lifting lugs are respectively fixedly connected with double lifting hooks 7 on a cantilever lifting beam 15 through two clamping rings (one main beam and one standby beam), and the next step of operation is started after the lifting lugs are firmly fixed; after the main beam and the cantilever hanging beam are firmly fixed, the steel pipe diagonal brace between the end part of the main steel beam and the column is removed, then bolts for connecting the main beam and the top of the steel column are removed, and the column is separated from the main beam; after the connecting bolt of girder and post was cut off, girder and post separation, the girder slides to the room direction of standing with demolising the device fast together, slides and decomposes on the reservation platform, transports the departure from the overhead platform of encorbelmenting afterwards.
And then dismantling the upright post of the safety protection shed, hoisting the upright post by adopting a quick dismantling device after the upright post is dismantled, controlling the position of the upright post by two wind-pulling ropes, and after the bottom is cut off, putting the upright post between lines outside the protection shed for dismantling by a chain block 8.
And finally, dismantling the reserved operating platform, wherein the roof panel, the secondary beam, the main beam and the column are dismantled by the same method, the main beam can be directly lifted to the height of the overhanging floor of the high-rise layer by the cantilever crane through the quick dismantling device, then the main beam is placed on the elevated road surface by rotation, and then the main beam is decomposed and transported out.
Claims (3)
1. The method for quickly dismantling the safety protection shed of the overhead high-speed rail operation line is characterized by comprising the following steps of:
1) the safety protection shed of the upper-span high-speed rail operation line is quickly disassembled to make and install the device: firstly, manufacturing a frame, wherein the frame is formed by welding a rail tooling jig main beam (3) and a rail tooling jig column (5); supporting rods (6) are arranged between the upper and lower layer track tooling jig frame main beams (3), and four frames are manufactured by the frames; four frames are welded and connected through a rail tooling jig frame main beam (3); the track tool jig frame is characterized in that a cantilever crane (2) is arranged beside a track tool jig frame column (5) and fixed with a track tool jig frame main beam (3) through a connecting steel plate, the cantilever crane (2) consists of a cantilever crane upright column (14), a cantilever crane beam (15), double lifting hooks (7) and a chain block (8), the double lifting hooks (7) are arranged at the top end of the cantilever crane upright column (14), and the double lifting hooks (7) are arranged on the cantilever crane beam (15); arranging track tooling jig frame secondary beams (4) between the top layer transverse track tooling jig frame main beams (3) at intervals, and then laying a roof profiled steel sheet as an operating platform (9); a pulley (10) and a horizontal sliding limiting device (12) are arranged on a bottom layer track tooling jig frame main beam (3); a counterweight (11) is arranged on the quick dismounting device at a position close to the elevation of the platform plane, and the whole framework is eccentrically arranged in the platform direction; a temporary track (18) is arranged on the platform (17) and forms three supporting points with the two pulleys (10) at the bottom of the device; after the construction of the quick dismantling device is finished on the same day, the quick dismantling device is fixed by a guy rope (13), and an anchoring point of the guy rope (13) is arranged at the bottom of a round steel column of the platform;
2) dismantling the roof panel of the safety protection shed: after the quick dismantling device for the safety protection shed of the upper-span high-speed rail operation line is installed and tested, the roof panel of the safety protection shed (16) is dismantled, the roof panel is dismantled towards the station house from the edge far away from the station house, and a plurality of spans are reserved for being used as a temporary operation platform;
3) and then, dismantling the longitudinal secondary beam: the protective shed is removed from the end far away from the station house along the line direction, and is sequentially removed towards the station house; the vertical track direction is realized, and the middle part is dismantled to the two side directions;
4) and then dismantling the transverse main steel beam: dismantling operation is carried out by utilizing a safe hanging basket and a quick dismantling device, and the dismantling sequence is opposite to that of a roof panel or a secondary beam;
5) and then dismantling the upright post of the safety protection shed: hoisting the upright column by using the cantilever crane (2), controlling the position of the upright column by using the guy rope, cutting off the bottom of the upright column, and hoisting the upright column to the outer side of the safety protection shed for disassembly;
6) and finally, dismantling a reserved operating platform: and the rest roof panels, columns and beams are dismantled in the same way, and finally the whole dismantling work of the safety protection shed is finished.
2. The demolition method according to claim 1, characterized in that: horizontal sliding limiting devices (12) are arranged on two sides of the pulley (10).
3. The demolition method according to claim 2, characterized in that: a cable wind rope (13) is arranged on the fast dismounting device of the safety protection shed of the upper-span high-speed rail operation line, and an anchoring point of the cable wind rope (13) is arranged at the bottom of a round steel column of the platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810229413.5A CN108277994B (en) | 2018-03-20 | 2018-03-20 | Method for quickly dismantling safety protection shed of overhead high-speed rail operation line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810229413.5A CN108277994B (en) | 2018-03-20 | 2018-03-20 | Method for quickly dismantling safety protection shed of overhead high-speed rail operation line |
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| CN108277994A CN108277994A (en) | 2018-07-13 |
| CN108277994B true CN108277994B (en) | 2020-03-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110158988A (en) * | 2019-06-28 | 2019-08-23 | 中冶建工集团有限公司 | A kind of building protection steel structure support and its quick method for dismounting |
| CN112727132B (en) * | 2020-12-10 | 2022-11-08 | 中铁五局集团建筑工程有限责任公司 | Method for dismantling existing canopy of overhead operation subway station |
| CN114876239B (en) * | 2022-05-11 | 2023-08-18 | 北京市第三建筑工程有限公司 | High-altitude overhanging structure closed protection dismantling system and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201082948Y (en) * | 2007-07-17 | 2008-07-09 | 贺东贤 | Over electrified railway overpass construction protecting canopy |
| US9227106B2 (en) * | 2012-05-21 | 2016-01-05 | Todd Richards | Weight lifting machine |
| CN107338727B (en) * | 2016-12-28 | 2023-04-11 | 广西路建工程集团有限公司 | Integrally-disassembled and assembled anti-collision wall template and walking type rail hanging and moving system thereof |
| CN107630458A (en) * | 2017-10-26 | 2018-01-26 | 汪成立 | A kind of filling concrete protective plate automatic disassembling machine of high-speed railway rail bridge pile foundation |
| CN107806009A (en) * | 2017-10-27 | 2018-03-16 | 中铁五局集团有限公司 | A kind of across the Existing Railway Line contact net protection canopy of highway and its construction method |
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