CN108277994A - On across the high ferro safe guarding shed quick method for dismounting of operation line - Google Patents

Abstract

The invention relates to a method for quickly dismantling a safety shed on a high-span high-speed rail operation line. Firstly, a quick dismantling device for a safety shed on an upper-span high-speed rail operation line is manufactured and installed. The quick dismantling device moves on the track, and the removed protective shed panels, secondary beams and other components are manually moved to the quick dismantling device for disassembly and transportation. When dismantling the transverse main girder, use the cantilever crane on the quick dismantling device to move the main girder horizontally to the reserved operating platform adjacent to the station building for disassembly. The invention solves the problem that the crane cannot be used due to insufficient space in some actual construction sites, and has simple operation and high construction efficiency.

Description

Quick dismantling method of the safety protection shed on the high-speed railway operation line

technical field

The invention relates to a device for removing a safety protection shed, in particular to a method for quickly removing a safety protection shed on an upper-span high-speed rail operation line.

Background technique

Due to the increase of railway lines, it is inevitable to encounter the situation of building new buildings across existing lines from above. This is especially common at stations where multiple lines meet. The usual practice is to set up safety shelters on existing lines. Setting up a safety shed can prevent the construction of adjacent or upper-span projects from affecting the normal operation of existing lines. At present, the construction of safety sheds on the existing lines in normal operation on the upper span is mainly for installation and construction, but as a temporary structure, the safety shed must be dismantled after the construction is completed. The traditional safety shelters are demolished by truck cranes or tower cranes, but these cranes will hinder the operation safety of existing lines, and the demolition of the station safety shelters is limited by the space on the construction site, making it impossible to allow large cranes to enter the site Auxiliary construction, which has brought a great impact on the demolition work of the safety shelter.

Based on this, it is very important to seek a fast dismantling device and dismantling method for a safety shed on the high-speed rail operation line at present.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects, and to provide a quick dismantling device for the safety protection shed of the existing line in normal operation.

The purpose of the present invention is achieved through the following technical solutions:

The method for quickly dismantling the safety shelter of the high-speed rail operation line is characterized in that it includes the following steps:

1) Fabrication and installation of the quick removal device for the safety shed on the upper-span high-speed rail operation line: first, a frame is made, and the frame is welded by the main beam 3 of the track tooling tire frame and the track tooling tire frame column 5; Support rods 6 are set between the main beams 3 of the tooling tire frame, and four frames are made in total; the four frame frames are welded and connected by the main beam 3 of the track tooling frame; Fixed with the main beam 3 of the track tooling tire frame, the cantilever crane 2 is composed of a cantilever suspension column 14, a cantilever suspension beam 15, double hooks 7 and a chain block 8, double hooks 7, and a cantilever suspension beam 15 is set on the top of the cantilever suspension column 14 , the double hook 7 is located on the cantilever beam 15; the track tooling frame secondary beam 4 is arranged at intervals between the top horizontal track tooling frame main beam 3, and then the roof profiled steel plate is laid as the operating platform 9; the bottom track tooling frame A pulley 10 and a horizontal slip limiting device 12 are installed on the main girder 3 of the frame; a counterweight 11 is installed on the quick release device close to the elevation of the platform, and the overall structure is arranged eccentrically in the direction of the platform; The two pulleys 10 form three fulcrums; the quick release device is fixed with the cable wind rope 13 after the construction is completed on the same day, and the cable wind rope 13 anchor points are located at the bottom of the round steel column of the platform;

2) Remove the roof panel of the safety protection shed: After the installation and inspection of the quick removal device for the safety protection shed on the high-speed rail operation line, start the removal of the 16 roof panels of the safety protection shed, starting from the farthest edge of the station building and dismantling towards the station building. A few spans are reserved for temporary operation platforms;

3) Then remove the longitudinal secondary beam: along the direction of the line, remove the protective shed away from the end of the station building, and remove it sequentially toward the station building; vertically to the track direction, remove it from the middle to both sides;

4) Then remove the horizontal main steel beam: use the safety basket and the quick removal device to carry out the removal operation, and the removal sequence is opposite to that of the roof panel or the secondary beam;

5) Remove the column of the safety shed: use the cantilever crane 2 to lift the column, and use the cable wind rope to control the position of the column, cut off the bottom of the column and hang it to the outside of the safety shed for disassembly;

6) Finally, dismantle the reserved operation platform: the remaining roof panels, columns and beams are dismantled as above, and finally complete the dismantling of the safety shed.

The cantilever crane 2 can be lifted up and down vertically, and can also be rotated 360°; the functions of the double hooks 7 are operation hooks, guide hooks and safety functions respectively.

Further, the pulley 10 can slide on the track. Horizontal slip-limiting devices 12 are provided on both sides of the pulley 10 to prevent the quick release device from derailing during the sliding process; in addition, a temporary track 18 will be provided on the platform 17, which is compatible with the track tooling tire. Two pulleys 10 at the bottom of the frame 1 form three fulcrums to ensure the stability of the device.

A counterweight 11 is provided on the second floor at the bottom of the quick dismantling device close to the level of the platform, and the overall structure is arranged eccentrically in the direction of the platform, which can further increase the self-stability of the quick dismantling device.

After the quick removal device for the safety shelter of the upper-span high-speed rail operation line is completed on the same day, it needs to be fixed with the cable wind rope 13, and the anchor point of the cable wind rope 13 is set at the bottom of the round steel column of the platform. Each quick dismantling device respectively draws two cable wind ropes 13 on the side of the platform, and pulls them tightly with a hand chain block 8.

The present invention has following characteristics and beneficial effect:

The quick removal device for the safety shelter of the upper-span high-speed rail operation line of the present invention can solve the problem of insufficient space at the construction site and the inability to use a crane at certain times.

The cantilever crane provided by the present invention can be stretched up and down and rotated 360°. When removing the transverse main girder, the cantilever crane can be used to transfer the main girder to the reserved operating platform for dismantling.

The quick dismantling device is used to dismantle the safety protection shed of the upper-span high-speed rail operation line, which is easy to operate and high in construction efficiency.

Description of drawings

Fig. 1 is a site diagram for removing the secondary beam by the quick dismantling device;

Fig. 2 is a top view of the quick dismantling device;

Figure 3 is a front view of the quick release device;

Fig. 4 is a three-dimensional schematic diagram of the quick removal device;

Fig. 5 is a schematic diagram of the cantilever crane of the quick removal device;

Fig. 6 is a schematic diagram of the horizontal slip limiting device of the quick release device;

Figure 7 is a side view of the quick release device.

In the figure, 2—cantilever crane; 3—main beam of track tooling tire frame; 4—secondary beam of track tooling tire frame, 5—track tooling tire frame column, 6—support rod; 7—double hook; 8—chain block ;9—operating platform; 10—pulley; 11—counterweight; 12—horizontal slip limiting device; 13—cable wind rope; 14—cantilever hanging column; 15—cantilever beam; 16—safety protection shed; 18 - Temporary track.

Detailed ways:

At first make a frame as shown in Figure 3, make 4 altogether, frame is welded by track tooling tire frame girder 3 and track tooling tire frame column 5. The width of the bottom of the frame is 3200mm, the width of the top is 4000mm, and the height of each layer is 1120mm, 1900mm, 1900mm, 2180mm and 1620mm. The support bar 6 is set at the midpoint of the main beam 3 of the horizontal track tooling tire frame. The support bar 6 is made of round steel pipe with a specification of φ89x4, the same as below. The penultimate layer is set at 3200mm, and the bottom layer is 1007mm, 1600mm and 2194mm respectively. Set up support rods.

The 4 frames prepared in the previous step are welded and connected by the main beam 3 of the longitudinal track tooling tire frame, with an interval of 3000mm, and a total of three spans of 9000mm; and a support bar is set at the midpoint of the 1st and 3rd spans, and the structure shown in Figure 7 is obtained.

On the 5 sides of the track tooling frame column of the formed structure, a cantilever crane 2 is set, as shown in Figure 5, the cantilever crane column 14 is made of a round steel pipe, and the size is φ245x12, and the cantilever beam 15 adopts a rectangular tube, and the specification is 300x200x10x10 . The length of the cantilever is 2m, it can vertically lift 0-1.6m, and it can rotate 360 degrees. The front end of the cantilever beam 15 is equipped with double hooks 7, one as a working hook, the other as a guide hook and safety, and equipped with a 2T chain hoist 8.

Next, in the middle of each span of the formed three-span structure, set the secondary beam 4 of the track tooling frame. The secondary beam 4 of the track tooling frame is also made of H-shaped steel, and the cross-sectional size is slightly smaller than the main beam 3 of the track tooling frame. Lay roof profiled steel plate as operating platform 9, as shown in Figure 2.

The pulley 10 and the horizontal slip limiting device 12 are installed at the bottom of the above structure, and the counterweight 11 is set on the quick release device close to the elevation of the platform. The overall structure is arranged eccentrically in the direction of the platform; The two pulleys 10 form three fulcrums; the quick release device is fixed with the cable wind rope 13 after the construction is completed on the same day, and the anchor point of the cable wind rope 13 is set at the bottom of the round steel column of the platform; finally, the upper-span high-speed rail as shown in Figure 4 is obtained Quick dismantling device for the safety shelter of the operation line.

The removal method of the safety shed on the upper-span high-speed rail operation line is as follows:

The first step of the demolition work is to remove the 16 roof panels of the safety shed, which is removed from the edge far away from the station building to the station building direction, and a few spans are reserved to be used as a temporary operating platform. The studs must be removed before the roof profiled steel plate is removed, and the studs will not be removed for the part of the roof panel that is not removed, so as to ensure the safety of driving outside the point. When removing a single roof profiled steel plate, cut it in the middle of the span, then manually drag the first and second roof panels to the quick-release devices on both sides, and finally decompose them on the quick-release devices Transfer out.

Then remove the secondary beam of the safety protection shed. The secondary beam is connected to the main beam by spot welding. The demolition construction mainly uses acetylene oxygen torch for construction work. At this time, the station of the quick removal device is shown in Figure 1. Oxygen acetylene torch is used to cut the connection position between the secondary beam and the main beam. When removing the secondary beam of the safety protection shed, it is removed from the mid-span to both sides. The quick dismantling device and the unremoved secondary beam are used as supporting points, and wooden boards are used. Set up a temporary operating platform with the formwork between the secondary beams of the safety protection shed as a passage for transporting to the platform truck. The operating platform 9 is moved in the direction of removal by one secondary beam spacing until one secondary beam remains on both sides, and the outermost secondary beams of the steel columns on both sides are retained to ensure that the main beams are connected firmly. After the secondary beam is disassembled on the operating platform of the tooling tire frame, it is hoisted to the platform by the cantilever crane 2. The structure of the cantilever crane is shown in Figure 5.

Then remove the horizontal main steel beam, and move the quick removal device to the two ends of the steel beam to be removed by using the pulley 10 at the bottom. Horizontal slip limiting devices 12 are provided on both sides of the pulley 10, as shown in Figure 6, to avoid derailment of the pulley . The order of removal of the main steel beams of a single protective shed is to remove them from the station building to the outside, which is opposite to the overall order of the roof panels and secondary beams. Before removing the single main girder, remove the two secondary girders used for stabilizing the structure to the quick dismantling device, cut off the upper flange plate of the steel girder to a length of 20 cm, and then punch two holes on the web at each end as lifting lugs , through two snap rings, respectively fixedly connected with the double hooks 7 on the cantilever beam 15 (one main and one standby), and start the next step after being fixed firmly; after the main beam and the cantilever beam are fixed firmly, the main steel The steel pipe diagonal brace between the beam end and the column is removed, and then the bolts connecting the main beam and the steel column top are removed to separate the column from the main beam; after the connecting bolts between the main beam and the column are cut off, the main beam is separated from the column, The beam slides towards the station building together with the quick dismantling device, slides to the reserved platform for disassembly, and then is transported out of the site from the elevated suspension platform.

Then remove the column of the safety shelter. The column is removed by using a quick removal device to lift the column, and the position of the column is controlled by two wind ropes. Disassemble.

Finally, the reserved operation platform is dismantled, and the roof panel, secondary beams, main beams, and columns are removed in the same way as above. The main beam can be directly lifted to the elevation of the cantilevered floor of the elevated floor by the cantilever crane of the quick removal device, and then the main beam is placed on the elevated road by rotation. surface, and then the main girder is decomposed and transported out.

Claims (3)

1. Across the high ferro safe guarding shed quick method for dismounting of operation line on 1., which is characterized in that include the following steps：

   1) making and installation of across the high ferro safe guarding shed fast dismounting device of operation line on：A Pin frames are made first, it is described Frame is welded by track tooling moulding bed girder (3) and track tooling moulding bed column (5)；In levels track tooling moulding bed girder (3) supporting rod (6) is set between, and frame makes four Pin altogether；Four Pin frames are welded by track tooling moulding bed girder (3) and are connected It connects；The setting cantilever crane (2) beside track tooling moulding bed column (5), it is solid by junction steel plate and track tooling moulding bed girder (3) Fixed, cantilever crane (2) is made of cantilever crane column (14), cantilever hanging beam (15), double-hung (7) and chain block (8), double-hung (7), cantilever crane column (14) top setting cantilever hanging beam (15), double-hung (7) are set on cantilever hanging beam (15)；In top layer transverse direction Interval setting track tooling moulding bed secondary beam (4) between track tooling moulding bed girder (3) is then laid with roofing profiled sheet as behaviour Make platform (9)；Pulley (10) and the sliding device (12) of horizontal limit are installed on bottom track tooling moulding bed girder (3)；Quickly tearing open Except, close to platform plane elevation location setting counterweight (11), overall architecture is platform direction arranged off-centre on device；In platform (17) temporary track (18) is set on, and three fulcrums are formed with two pulleys (10) of bottom of device；Fast dismounting device is constructed on the day of After the completion, it is fixed with cable wind rope (13), cable wind rope (13) anchor point is located at the round steel column bottom of platform；

   2) safe guarding shed roof boarding is removed：On the safe guarding shed fast dismounting device installation of across high ferro operation line be verified, The dismounting for starting safe guarding shed (16) roof boarding is removed since far from station most edge to station direction, reserve it is several across Do temporary operating platform use；

   3) longitudinal secondary beam is then removed：It removes since far from station end protection canopy along line direction, is torn open to station direction sequence It removes；Vertical track direction is removed from centre to two side directions；

   4) and then laterally main girder steel is removed：Dismounting operation, dismounting sequence and room are carried out using safety hanging cradle and fast dismounting device Panel or secondary beam are opposite；

   5) safe guarding shed column is removed again：Column is sling using cantilever crane (2), and utilizes the position of cable wind rope control column It sets, safe guarding shed outside is hung to after column bottom is cut off and is disassembled；

   6) reservation operations platform is finally removed：Remaining roof boarding, column, beam dismantling operation are same as above, are finally completed safe guarding shed Whole remove work.
2. 2. construction method according to claim 1, it is characterised in that：Pulley (10) both sides are provided with the sliding device of horizontal limit (12)。
3. 3. construction method according to claim 2, it is characterised in that：It quickly tears open upper across high ferro operation line is safe guarding shed Except device is equipped with cable wind rope (13), cable wind rope (13) anchor point is located at the circular steel column column bottom of platform.