Ton-level prefabricated air duct plate synchronous lifting counter-hanging system

Abstract

The application discloses a tonnage level prefabricated air duct plate synchronous lifting counter-hanging system, which comprises a portal frame arranged on the top floor of an underground traffic station, a plurality of through-hole jacks vertically arranged on the portal frame in multiple rows and columns, steel strands arranged on the through-hole jacks, anchorage devices for locking the steel strands, and a hydraulic control system arranged on the portal frame and used for controlling synchronous lifting of the through-hole jacks. The application can safely, stably and synchronously lift the tonnage level prefabricated air duct plate below the top floor of the underground traffic station in a narrow space to a target height position, meets the load weight bearing capacity requirement of the tonnage level prefabricated air duct plate, and avoids the safety risk of distortion, cracking and tilting instability of the tonnage level prefabricated air duct plate.

Description

Technical Field

[0001] This invention relates to the field of construction technology for thermal exhaust ducts in underground transportation stations, and in particular to a tonnage-level prefabricated ventilation duct slab synchronous lifting and reverse hoisting system. Background Technology

[0002] The thermal exhaust ducts in subway and other underground transportation stations consist of duct panels connected to the top floor slab via side walls on both sides. These duct panels can be assembled using prefabricated duct panels of a certain weight capacity. However, the construction space for thermal exhaust ducts in underground transportation stations is often too narrow to allow access for large hoisting equipment to lift the prefabricated duct panels to the target height below the top floor slab. Using hoists would require a large number of hoists to be densely suspended on the top floor slab to meet the load-bearing requirements of the prefabricated duct panels. This dense arrangement and dismantling of the hoists would cause significant structural damage to the top floor slab. Furthermore, the large number of hoists would make it difficult to synchronize the lifting points, leading to imbalances and increasing the risk of twisting, cracking, and tilting instability in the prefabricated duct panels. Summary of the Invention

[0003] The purpose of this invention is to provide a synchronous lifting and reverse hoisting system for tonnage-level prefabricated ventilation duct slabs, in order to solve the problem of how to safely, smoothly, synchronously, and precisely hoist and lift tonnage-level prefabricated ventilation duct slabs below the top floor slab of underground transportation stations in narrow spaces, so as to avoid the safety risks of tonnage-level prefabricated ventilation duct slabs being twisted, cracked, or tilted and unstable.

[0004] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a tonnage-level prefabricated ventilation duct slab synchronous lifting and reverse hoisting system, including a gantry frame installed on the top floor slab of an underground transportation station, multiple through-hole jacks vertically arranged in multiple rows and columns on the gantry frame, steel strands threaded through each of the through-hole jacks, and a hydraulic control system installed on the gantry frame for controlling the synchronous lifting and lowering of each of the through-hole jacks.

[0005] Furthermore, the tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system provided by the present invention also includes:

[0006] The lifting devices are multiple, and each one is connected to the end of a single steel strand;

[0007] The lifting lugs, one for each of the tonnage-class prefabricated air duct panels to be lifted, are arranged on the panels with a steel strand.

[0008] Furthermore, the tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system provided by the present invention also includes:

[0009] An anchor is installed on the steel strand and abuts against the top floor slab of the underground transportation station.

[0010] Furthermore, the tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system provided by the present invention also includes:

[0011] A pressure-bearing pad is installed at the contact position between the gantry and the top floor slab, and at the contact position between the anchor and the top floor slab.

[0012] Furthermore, in the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system provided by the present invention, the through-hole jacks are arranged in three rows and two columns of six, and the column direction of the through-hole jacks is the length direction of the tonnage-level prefabricated air duct slab.

[0013] Furthermore, the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system provided by the present invention includes a gantry frame comprising a planar frame and vertically uniformly arranged support legs below it.

[0014] Furthermore, the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system provided by the present invention has a planar frame composed of multiple transverse steel sections and multiple longitudinal steel sections spliced ​​together.

[0015] Furthermore, in the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system provided by the present invention, the steel section is an H-shaped steel composed of two channel steels joined together.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention provides a tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system. This system, consisting of a gantry frame, through-hole jacks, steel strands, anchors, and a hydraulic control system, is installed above the top floor slab. The steel strands are connected to a specific tonnage-level precast ventilation duct slab by passing through the top floor slab. The hydraulic control system controls the synchronous lifting and lowering of the through-hole jacks on the steel strands, thereby lifting the tonnage-level precast ventilation duct slab to a target height below the top floor slab. Compared to the traditional method of densely suspending precast ventilation duct slabs on the top floor slab using hoists, this system enables the safe, stable, synchronous, and precise lifting and repositioning of tonnage-level precast ventilation duct slabs located below the top floor slab in the confined space of an underground transportation station. The target height below the top floor slab is determined to meet the load-bearing capacity requirements for the tonnage-level prefabricated air duct slab, thus avoiding the safety risks of twisting, cracking, and tilting instability of the tonnage-level prefabricated air duct slab. It also avoids the problem of difficulty in removing the hoist in the heat exhaust channel formed by the tonnage-level prefabricated air duct slab, side wall, and top floor slab after the tonnage-level prefabricated air duct slab is connected to the top floor slab through the side wall, which is due to the limited space. Alternatively, it avoids the problem of the hoist being placed outside the tonnage-level prefabricated air duct slab and suspended at an angle, which leads to an imbalance of the lifting points and makes it difficult to safely, stably, and synchronously lift the tonnage-level prefabricated air duct slab. It also overcomes the problem of the narrow space in the heat exhaust channel of underground transportation stations, which prevents traditional large lifting equipment such as truck cranes from entering the site. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the elevation structure of a tonnage-level prefabricated ventilation duct slab synchronous lifting and reverse hoisting system and its usage status;

[0019] Figure 2 This is a schematic diagram of the elevation structure of the gantry frame and the jack base on it;

[0020] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0021] Figure 4 This is a schematic diagram of the planar structure of a tonnage-sized prefabricated air duct slab and the distribution of its lifting lugs;

[0022] As shown in the figure:

[0023] 100. Tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system; 110. Gantry frame; 111. Planar frame; 112. Outriggers; 120. Through-hole jack; 121. Jack base; 130. Steel strand; 131. Lifting tool; 140. Anchor; 150. Hydraulic control system; 160. Bearing pad.

[0024] 200. Top floor slab;

[0025] 300. Tonnage-level prefabricated air duct slab; 301. Lifting lugs. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0027] Please refer to Figure 1 This invention provides a tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system 100, including a gantry frame 110 installed on the top floor slab 200 of an underground transportation station, multiple through-hole jacks 120 arranged vertically in multiple rows and columns on the gantry frame 110, steel strands 130 threaded through each of the through-hole jacks 120, and a hydraulic control system 150 installed on the gantry frame 110 for controlling the synchronous lifting and lowering of each of the through-hole jacks 120.

[0028] The tonnage-level precast ventilation duct slab synchronous lifting and reversing system 100 provided in this embodiment of the invention, by setting up the tonnage-level precast ventilation duct slab synchronous lifting and reversing system 100, composed of a gantry frame 110, through-hole jacks 120, steel strands 130, anchors 140 and a hydraulic control system 150 above the top floor slab 200, by connecting the steel strands 130 through the top floor slab 200 to a certain tonnage-level precast ventilation duct slab 300, and by controlling the synchronous lifting and lowering of the through-hole jacks 120 and the steel strands 130 above them by the hydraulic control system 150, so as to lift the tonnage-level precast ventilation duct slab 300 to a target height position below the top floor slab 200. Compared with the traditional scheme of densely suspending hoists on the top floor slab 200, this system can safely and stably lift the tonnage-level precast ventilation duct slab 300 located below the top floor slab 200 in the narrow space of the underground transportation station. The system synchronously hoists and precisely lifts the precast ventilation duct slab 300 to the target height below the top floor slab 200 of the underground transportation station, meeting the load-bearing capacity requirements for the ton-level precast ventilation duct slab 300. This avoids the safety risks of twisting, cracking, and tilting instability of the ton-level precast ventilation duct slab 300. It also avoids the problem of difficulty in removing the hoist from the heat exhaust channel formed by the ton-level precast ventilation duct slab 300, the side wall, and the top floor slab 200 when the ton-level precast ventilation duct slab 300 is connected to the top floor slab 200 through the side wall, which is due to limited space. Alternatively, it avoids the problem of the hoist being placed outside the ton-level precast ventilation duct slab 300 and suspended at an angle, resulting in an unbalanced lifting point that makes it difficult to safely, stably, and synchronously hoist the ton-level precast ventilation duct slab 300. Furthermore, it overcomes the problem of the narrow space in the heat exhaust channel of the underground transportation station, which prevents traditional large hoisting equipment such as truck cranes from entering the site.

[0029] The tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100 provided in this embodiment of the invention is installed above the top floor slab 200 of the underground transportation station, forming a reverse hoisting force system for the tonnage-level precast duct slab 300 in the opposite direction below the top floor slab 200. The tonnage-level precast duct slab 300 is connected to the top floor slab 200 for reverse hoisting through steel strands 130, so that the tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100 does not occupy the lower space of the top floor slab 200 of the underground transportation station, which facilitates the lifting and hoisting control of the tonnage-level precast duct slab 300 and avoids the problem of operation restriction or inconvenience caused by the hoist being set below the top floor slab 200 of the underground transportation station.

[0030] Please refer to Figure 1 and Figure 4 To enable rapid connection and dismantling of the steel strand 130 and the tonnage-level prefabricated air duct slab 300, the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system 100 provided in this embodiment of the invention may further include:

[0031] There are multiple lifting devices 130, each connected to one end of a steel strand 130. Each lifting device 130 can be a shackle.

[0032] Multiple lifting lugs 301 are provided, each corresponding to a steel strand 130, and are installed on the tonnage-class prefabricated air duct slab 300 to be lifted.

[0033] The steel strand 130 and the tonnage-level prefabricated air duct 300 can be quickly connected and dismantled by the lifting device 130 and the lifting lug 301.

[0034] Please refer to Figure 1 The tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100 provided in this embodiment of the invention may further include: an anchor 140, installed on the steel strand 130 and abutting against the top floor slab 200 of the underground transportation station. After the tonnage-level precast duct slab 300 is lifted to the target height by the tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100, the steel strand 130 is locked by the anchor 140. This releases the constraints on the remaining components of the tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100, allowing them to be transferred and installed in the next location, thus preventing the tonnage-level precast duct slab synchronous lifting and reverse hoisting system 100 from being occupied.

[0035] Please refer to Figure 2 and Figure 3To improve the structural stability of the gantry frame 110 as a reaction support for the through-hole jack 120, this embodiment of the invention provides a tonnage-level prefabricated duct slab synchronous lifting and reverse hoisting system 100. The gantry frame 110 includes a planar frame 111 and vertically evenly arranged support legs 112 below it. The planar frame 111 can be composed of multiple transverse and longitudinal steel sections spliced ​​together. The steel sections can be H-beams composed of two channel steel sections joined together. To improve the structural stability of the through-hole jack 120 mounted on the gantry frame 110, a jack base 121 is also provided on the gantry frame 110, through which the through-hole jack 120 is mounted on the gantry frame 110.

[0036] Please refer to Figure 1 To protect the top floor slab 200, the tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system 100 provided in this embodiment of the invention may further include:

[0037] A pressure-bearing pad 160 is installed at the contact position between the gantry 110 and the top floor slab 200, or at the contact position between the anchor 140 and the top floor slab 200. The pressure-bearing pad 160 increases the contact area with the top floor slab 200, distributing the load and protecting the top floor slab 200, thus preventing the legs 112 of the gantry 110 from crushing it.

[0038] To support the weight load of the tonnage-level prefabricated air duct slab 300, the tonnage-level prefabricated air duct slab synchronous lifting and reverse hoisting system 100 provided in this embodiment of the invention includes six through-hole jacks 120 arranged in three rows and two columns, corresponding to six tonnage-level prefabricated air duct slabs 300 also arranged in three rows and two columns. The column direction of the through-hole jacks 120 is the length direction of the tonnage-level prefabricated air duct slab 300. Of course, the through-hole jacks 120 are not limited to six arranged in three rows and two columns, but can also be eight arranged in four rows and two columns.

[0039] This invention is not limited to the specific embodiments described above. Obviously, the embodiments described above are only a part of the embodiments of this invention, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this invention are within the scope of protection of this invention. Those skilled in the art can make other modifications and variations to this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention, then this invention also intends to include these modifications and variations.

Claims

1. A tonnage-level prefabricated ventilation duct slab synchronous lifting and reverse hoisting system, characterized in that, It includes a gantry frame installed on the top floor slab of an underground transportation station, multiple through-hole jacks arranged vertically in multiple rows and columns on the gantry frame, steel strands threaded through each of the through-hole jacks, and a hydraulic control system installed on the gantry frame for controlling the synchronous lifting and lowering of each of the through-hole jacks.

2. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 1, characterized in that, Also includes: The lifting devices are multiple, and each one is connected to the end of a single steel strand; The lifting lugs, one for each of the tonnage-class prefabricated air duct panels to be lifted, are arranged on the panels with a steel strand.

3. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 1, characterized in that, Also includes: An anchor is installed on the steel strand and abuts against the top floor slab of the underground transportation station.

4. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 3, characterized in that, Also includes: A pressure-bearing pad is installed at the contact position between the gantry and the top floor slab, and at the contact position between the anchor and the top floor slab.

5. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 1, characterized in that, The through-hole jacks consist of six jacks arranged in three rows and two columns, with the columns of the through-hole jacks pointing in the direction of the length of the tonnage-level prefabricated air duct slab.

6. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 1, characterized in that, The gantry frame includes a planar frame and vertically uniformly arranged support legs below it.

7. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 6, characterized in that, The planar frame is composed of multiple transverse steel sections and multiple longitudinal steel sections spliced ​​together.

8. The tonnage-level precast ventilation duct slab synchronous lifting and reverse hoisting system according to claim 7, characterized in that, The steel section is an H-beam composed of two channel steel sections joined together.

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