CN113235972A

CN113235972A - Trolley for dismantling existing station canopy and construction method

Info

Publication number: CN113235972A
Application number: CN202110593888.4A
Authority: CN
Inventors: 刘洋; 杨俊�; 敖凌宇; 杨才鑫; 崔凯
Original assignee: China Railway No 5 Engineering Group Co Ltd; Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Current assignee: China Railway No 5 Engineering Group Co Ltd; Construction Engineering Co Ltd of China Railway No 5 Engineering Group Co Ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-08-10

Abstract

The invention discloses a trolley for removing an existing station canopy and a construction method. What need demolish is tunnel type canopy, installs the platform truck track in canopy both sides before demolising, assembles the platform truck, divides the canopy into a plurality of units of tearing open entirely, moves the platform truck to canopy top and protects, utilizes the overhead traveling crane on the platform truck to hang out the unit of tearing open entirely. The invention adopts the modular trolley frame-transporting construction technology, can effectively avoid repeated investment, installation and removal of the supporting structure, greatly saves materials and labor cost, and effectively shortens the construction period.

Description

Trolley for dismantling existing station canopy and construction method

Technical Field

The invention relates to a trolley structure and a method for disassembling a canopy by using the trolley.

Background

With the expansion and development of cities, some originally built rail platforms cannot meet the requirements of passenger flow or modernization, and original stations need to be reconstructed. The existing platform canopy structure is generally arranged along a tunnel type track, the tracks on two sides of the platform and the platform are arranged below the canopy, along with reconstruction of the station, the canopy needs to be reconstructed into a larger and more attractive structure, and the existing canopy needs to be dismantled.

In order to not influence the normal operation of a station, the dismantling operation can be carried out only at midnight every day, and a large amount of high-altitude assembly and welding are required to be carried out on the existing line in the construction of newly-built steel structure net racks, so that the quality and safety risk are high; meanwhile, the smooth operation of the dismantling of the old rainshed is ensured. The construction risk is extremely high, and the construction organization degree of difficulty is huge.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to safely remove the rain shed in a short window period.

The technical scheme of the invention is as follows:

the utility model provides a platform truck for demolising existing station canopy, includes running gear and stand, the gate-type structure of platform truck by about two stands with about two crossbeams constitute, two crossbeams certain angle of slope upslope and constitute the top structure of hillside top shape at end connection, two gate-type structures constitute platform truck overall structure through linking the member around, the overhead traveling crane of vertical walking is installed in platform truck top both sides, the hanging track of overhead traveling crane installs the below of two crossbeams in the front and back.

And an inclined strut is arranged between the upright post and the cross beam and is used as a reinforcing structure.

The top slope surfaces of the front and rear cross beams are provided with longitudinally distributed distribution beams, and the top panel is arranged through the distribution beams.

The outer sides of the upright posts are provided with longitudinally distributed distribution beams and side panels are arranged through the distribution beams.

What need demolish is tunnel type canopy, builds the platform truck track in canopy both sides, and concatenation will existing canopy cover around a plurality of platform trucks.

A construction method for dismantling a canopy of an existing station comprises the steps that a tunnel type canopy needs to be dismantled, trolley rails are installed on two sides of the canopy before dismantling, a trolley is assembled, the canopy is divided into a plurality of integral dismantling units, a scattered dismantling area is arranged between every two adjacent integral dismantling units, and the trolley is moved to the position above the canopy to be protected; dismantling each integral dismantling unit: the method comprises the steps of firstly, detaching a connecting structure of a scattered detaching area from the end part of a canopy, separating a whole detaching unit, then connecting the whole detaching unit with a hoisting structure of a trolley, cutting the connection between a whole detaching unit framework and an embedded structure, and finally hoisting the whole detaching unit by using a crown block on the trolley.

Install the gate-type lighting fixture on the platform of canopy below, install the lamp truss transition of installing on former canopy on the gate-type lighting fixture before demolising the canopy.

When the bulk disassembly area is disassembled, a protective trolley is arranged on the lower track.

And (4) building extension platforms at two ends of the canopy to serve as areas for trolley assembly, hoisting and integral disassembly unit hoisting.

The construction is synchronously pushed from the two ends of the canopy to the middle.

The invention has the beneficial effects that:

(1) by adopting the modular trolley frame transporting construction technology, each trolley and the dismantled old canopy unit are hoisted at fixed points, the hoisting scale is effectively controlled, the occupation of hoisting construction on a construction site is reduced, and the influence range of large-scale hoisting is greatly reduced.

(2) The trolley can be simultaneously used as a main stressed support for the newly-built canopy unit block, the old canopy unit block and the protection shed project, repeated investment and installation and removal of the supporting structure can be effectively avoided, materials and labor cost are greatly saved, and the construction period is effectively shortened.

(3) According to the structural characteristics of the newly-built canopy in the track area of the project, the trolley transportation frame construction adopts a mode of synchronously pushing from two ends to the middle to organize the construction, so that the construction period can be effectively shortened.

(4) The trolley modules are mutually independent, the trolleys can be moved and dispersedly carried out, the requirement on an electrical control system is low, and resource allocation and control on site are facilitated.

Drawings

Fig. 1 is a schematic view of the entire structure of the cart.

Fig. 2 is a partially enlarged view of fig. 1.

Fig. 3 is a side view of the trolley (with the panel removed).

Fig. 4 is a schematic view of a construction scene in which the canopy is dismantled by using the trolley.

Fig. 5 is a schematic sectional view of an existing canopy.

Fig. 6 is a schematic side view of the trolley (including the deck).

Detailed Description

Example (b):

as shown in fig. 1 and 2, the trolley structure comprises a travelling mechanism 6 and columns 1, the gate structure of the trolley comprises a left column 1, a right column 1, a left beam 3, a right beam 3, two beams 3 which incline upwards for a certain angle and are connected at the end parts to form a top structure in the shape of a slope top, a front gate structure and a rear gate structure form an integral trolley structure through a connection rod piece, crown blocks 5 which travel longitudinally are arranged on two sides of the top of the trolley, and a hanging track 4 of each crown block 5 is arranged below the front beam 3 and the rear beam 3.

And an inclined strut 2 is arranged between the upright post 1 and the cross beam 3 as a reinforcing structure.

The top slope surfaces of the front and rear cross beams 3 are provided with longitudinally distributed distribution beams 31, and the top panel 32 is arranged through the distribution beams 31.

On the outside of the column 1 are mounted longitudinally distributed distribution beams 11 and through the distribution beams 11 side panels 12.

The tunnel type canopy dismantling method comprises the following steps:

the method comprises the following steps: extension platforms are installed at two ends of the canopy and used as the mounting and dismounting areas of the door type trolley.

Step two: the method includes the steps that door type trolley rails are erected on two sides of a canopy and on an extension platform, meanwhile, a crane is used for assembling a door type truss vehicle in a ground assembling area, then the door type truss vehicle is integrally hoisted to the extension platform rail to be installed, an electrical system is debugged, and the door type truss vehicle travels to a rail running area one by one to be protected.

Step three: and (4) completing the installation of a newly-built roof and a rainproof roof in the rail traveling area, installing island type platform protection, and switching the electric power and the transformation on the platform.

Step four: the method comprises the steps of firstly, segmenting the canopy, taking each segment as an integral disassembly area, taking a connecting structure between adjacent segments as a scattered disassembly area, and utilizing a crane and a climbing vehicle to cooperate with manpower to disassemble connection rods and decorative plates between the segments of the existing canopy on two sides of a platform.

The existing canopy is divided into 11 blocks to remove the unit, 10 scattered units of tearing open, and the time of demolising of every district decomposes: the enclosure system 1d, the secondary steel structure 1d, the steel frame 1d, the single-frame dismantling time needs 3d, and the dismantling time of 11 dismantling units needs 33 d. And considering other external factors such as tooling, removal preview and the like, and considering all removal completion according to 40 d.

Step five: and in the skylight time, the rainproof tiles, the light-transmitting tiles, the roof horizontal tie bars and the cross pull cables between the sections of the canopy are sequentially dismantled by matching the door type truss cars with manpower. The suspender below the canopy ring-shaped keel is bound and locked with the keel through a rope.

Step six: the skylight time utilizes door-type truss car integral hoisting canopy segmentation, and every canopy piecemeal comprises two annular fossil fragments, and door-type truss car electric block couple is on canopy annular skeleton. And meanwhile, 4 protection trolleys are arranged on the subway rail on each side of the dismounting area to protect the rail, and then the joint of the annular framework and the embedded part is manually cut. And integrally transporting the door type truss to an extension platform for dismantling.

Step seven: and sequentially dismantling each hoisting block of the existing canopy according to the fifth step and the sixth step. And after all the door type truss car track systems are dismantled, the truck crane and the forklift are used for dismantling the door type truss car track systems.

Claims

1. The utility model provides a platform truck for demolising existing station canopy, includes running gear and stand, its characterized in that: the gantry structure of the trolley consists of a left upright post, a right upright post, a left crossbeam and a right crossbeam, wherein the two crossbeams incline upwards by a certain angle and are connected at the end parts to form a top structure in the shape of a slope top, the front gantry structure and the rear gantry structure form the integral structure of the trolley through connecting rods, crown blocks which longitudinally walk are installed on two sides of the top of the trolley, and hanging rails of the crown blocks are installed below the front crossbeam and the rear crossbeam.

2. The trolley for demolishing the canopy of an existing station as set forth in claim 1, wherein: and an inclined strut is arranged between the upright post and the cross beam and is used as a reinforcing structure.

3. The trolley for demolishing the canopy of an existing station as set forth in claim 2, wherein: the top slope surfaces of the front and rear cross beams are provided with longitudinally distributed distribution beams, and the top panel is arranged through the distribution beams.

4. A trolley for demolishing the canopy of an existing station according to claim 3, wherein: the outer sides of the upright posts are provided with longitudinally distributed distribution beams and side panels are arranged through the distribution beams.

5. The trolley for demolishing the canopy of an existing station as set forth in claim 4, wherein: what need demolish is tunnel type canopy, builds the platform truck track in canopy both sides, and concatenation will existing canopy cover around a plurality of platform trucks.

6. A construction method for dismantling the existing station canopy is characterized in that: the method comprises the following steps that a tunnel-type canopy is required to be dismantled, trolley rails are installed on two sides of the canopy before the canopy is dismantled, a trolley is assembled, the canopy is divided into a plurality of integral dismantling units, a scattered dismantling area is arranged between every two adjacent integral dismantling units, and the trolley is moved to the position above the canopy for protection; dismantling each integral dismantling unit: the method comprises the steps of firstly, detaching a connecting structure of a scattered detaching area from the end part of a canopy, separating a whole detaching unit, then connecting the whole detaching unit with a hoisting structure of a trolley, cutting the connection between a whole detaching unit framework and an embedded structure, and finally hoisting the whole detaching unit by using a crown block on the trolley.

7. The construction method for dismantling the existing station canopy according to claim 6, characterized in that: install the gate-type lighting fixture on the platform of canopy below, install the lamp truss transition of installing on former canopy on the gate-type lighting fixture before demolising the canopy.

8. The construction method for dismantling the existing station canopy according to claim 6 or 7, characterized in that: when the bulk disassembly area is disassembled, a protective trolley is arranged on the lower track.

9. The construction method for dismantling the existing station canopy according to claim 6, characterized in that: and (4) building extension platforms at two ends of the canopy to serve as areas for trolley assembly, hoisting and integral disassembly unit hoisting.

10. The construction method for dismantling the existing station canopy according to claim 6, characterized in that: the construction is synchronously pushed from the two ends of the canopy to the middle.