Rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure and use method

Abstract

The present invention discloses a rear-mounted balanced counterweighted large-span double-layer cable-suspended membrane roof structure, which relates to the field of renewable clean energy. It includes a water conveyance main canal, a self-supporting frame structure, a pulley block, a combined counterweight block group, an upper load-bearing cable and a membrane roof structure; the two ends of the upper load-bearing cable are connected to the combined counterweight block group; the top of the membrane roof structure has a lower membrane structure stabilizing cable, and the upper load-bearing cable is connected to the lower membrane structure stabilizing cable through a vertical suspension cable. Based on the characteristics of the water conveyance main canal and the need for rear-mounted covering, the present invention forms a self-supporting, self-balancing and force-bearing flexible structure by arranging a large-span double-layer cable-suspended structure with structural supports and balanced counterweights at both ends above the open water conveyance main canal, and the membrane roof structure can be conveniently laid under the flexible structure, thereby forming a cover above the water conveyance main canal. The present invention also relates to a method for using this rear-mounted balanced counterweighted large-span double-layer cable-suspended membrane roof structure.

Description

Technical Field

[0001] The invention relates to the field of renewable clean energy, and more specifically to a rear-mounted balanced counterweighted large-span double-layer cable suspension membrane roof structure. The invention also relates to a method for using the rear-mounted balanced counterweighted large-span double-layer cable suspension membrane roof structure. Background Art

[0002] Taking the large-scale water supply trunk canals of water conservancy and water affairs as an example, they are generally characterized by wide artificial channels (80m-120m) and long distances (more than 1200km). In addition, due to the requirement of water quality assurance, operation and maintenance inspection channels (horse paths) and protective buffer green belts are also set on both sides of the trunk canals. If the protection range is taken into account, the entire width of the trunk canal can reach 150m. Since the water supply trunk canals are generally in the form of open channels, there is no obstruction in the entire trunk canal flow except for control buildings such as regulating gates. Under long-distance conditions, the evaporation of the trunk canal is large and there is surface pollution, so there is a need to add a cover above the trunk canal. Since supports are not allowed in the channel, the cover and support structure above the channel are post-mounted and have a large span.

[0003] Therefore, without affecting the original water conveyance and supply functions of the main canal, it is necessary to develop a post-mounted balanced counterweight large-span double-layer suspension membrane roof structure that does not require ground anchors, pre-buried or other anchoring and fixing facilities. Summary of the invention

[0004] The first object of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure.

[0005] The second purpose of the present invention is to provide a method for using the rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure.

[0006] In order to achieve the above first purpose, the technical solution of the present invention is: a rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure, characterized in that it includes a water conveyance main canal, a self-supporting frame structure located on the horseway on both sides of the water conveyance main canal, a pulley block located on the top of the self-supporting frame structure, a combined counterweight block group located on the side of the self-supporting frame structure away from the water conveyance main canal, an upper load-bearing cable and a membrane roof structure;

[0007] A plurality of pulley blocks are arranged at intervals on the top of the self-supporting frame structure, and both ends of the upper load-bearing cable are connected to the combined counterweight block group through the pulley blocks;

[0008] The membrane roof structure is an arc-shaped structure that is high in the middle and low on both sides. A plurality of lower membrane structure stabilizing cables are arranged on the top of the membrane roof structure. The upper load-bearing cables are connected to the lower membrane structure stabilizing cables through vertical suspension cables.

[0009] In the above technical solution, a limiting device is provided on the combined counterweight block group.

[0010] In the above technical solution, the combined counterweight block group is a prefabricated concrete structural member, the upper load-bearing cable is a steel strand, and the membrane roof structure is composed of a coated non-woven fabric or PV or polytetrafluoroethylene membrane material.

[0011] In order to achieve the above second purpose, the technical solution of the present invention is: a method for using a rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure, characterized in that it includes the following steps:

[0012] Step 1: A self-supporting frame structure is set according to the width and clearance of the bridleway, a pulley block is set on the top of the self-supporting frame structure, and a combined counterweight block group and a limit device are set on the side of the self-supporting frame structure away from the water supply main channel;

[0013] Step 2: Multiple pulley blocks are distributed at a certain interval, and the upper load-bearing cables are connected to the combined counterweight block group through the pulley block on the frame structure. The multiple upper load-bearing cables form a prestressed tensioned flexible structure, and the counterweight of the combined counterweight block group is adjusted to form a symmetrical balanced force condition;

[0014] The lower membrane structure stabilizing cables at the top of the membrane roof structure are connected to the lower membrane structure stabilizing cables through vertical suspension cables. The vertical suspension cables gradually become shorter from both sides to the middle, so that the membrane roof structure forms an arc structure with high middle and low sides, allowing rainwater to drain to both sides of the membrane roof structure.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1) Based on the characteristics of the water supply main channel and the need for post-installed covering, the present invention forms a self-supporting, self-balancing flexible structure by arranging a large-span double-layer suspension structure with structural supports at both ends and balanced weights above the open water supply main channel. The membrane roof structure can be conveniently laid under the above flexible structure, thereby forming a cover above the water supply main channel.

[0017] 2) The entire structure of the present invention can be assembled, disassembled, and adjusted (counterweighted) on site, and is particularly suitable for temporary covering and insulation (during water delivery during ice ages), as well as many other applicable scenarios, so it has significant social and economic benefits.

[0018] 3) The present invention has no fixed points as a whole and can slide freely in the direction of large span, so it can adapt well to various temporary loads such as strong winds, heavy rains, heavy snow, and thermal expansion and contraction deformation caused by temperature changes.

[0019] 4) The present invention can conveniently adjust and compensate for the permanent deformation of the suspension cables in the flexible structure by adjusting the counterweights of the combined counterweight block groups on both sides, so that the membrane roof structure can maintain a long-term stable shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Among them, 1- water supply main channel, 11- horseway, 2- self-supporting frame structure, 21- pulley block, 3- combined counterweight block group, 31- limit device, 4- upper load-bearing cable, 41- vertical suspension cable, 5- membrane roof structure, 51- lower membrane structure stabilizing cable. DETAILED DESCRIPTION

[0022] The following detailed description of the implementation of the present invention is made in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention will become clearer and easier to understand through the description.

[0023] Referring to the attached drawings, it can be seen that the rear-mounted balanced counterweight large-span double-layer cable suspension membrane roof structure is characterized by comprising a water conveyance main channel 1, a self-supporting frame structure 2 located on a horseway 11 on both sides of the water conveyance main channel 1, a pulley block 21 located on the top of the self-supporting frame structure 2, a combined counterweight block group 3 located on the side of the self-supporting frame structure 2 away from the water conveyance main channel 1, an upper load-bearing cable 4 and a membrane roof structure 5;

[0024] A plurality of pulley blocks 21 are arranged at intervals on the top of the self-supporting frame structure 2, and both ends of the upper load-bearing cable 4 are connected to the combined counterweight block group 3 through the pulley blocks 21;

[0025] The membrane roof structure 5 is an arc-shaped structure that is high in the middle and low on both sides. There are multiple lower membrane structure stabilizing cables 51 on the top of the membrane roof structure 5, and the upper load-bearing cables 4 are connected to the lower membrane structure stabilizing cables 51 through vertical suspension cables 41.

[0026] The combined counterweight block group 3 is provided with a limiting device 31 .

[0027] The combined counterweight block group 3 is a prefabricated concrete structural member with a unit weight, which is convenient for adding and adjusting counterweights; the upper load-bearing cables 4 are steel strands, and the membrane roof structure 5 is composed of coated non-woven fabrics or PV or polytetrafluoroethylene membrane materials.

[0028] The method for using a rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure is characterized by comprising the following steps:

[0029] Step 1: a self-supporting frame structure 2 is arranged according to the width and clearance of the bridleway 11, a pulley block 21 is arranged on the top of the self-supporting frame structure 2, and a combined counterweight block group 3 and a limit device 31 are arranged on the side of the self-supporting frame structure 2 away from the water supply main channel 1;

[0030] Step 2: Multiple pulley blocks 21 are distributed at a certain interval, and the upper load-bearing cables 4 are connected to the combined counterweight block group 3 through the pulley blocks 21 on the frame structure 2. The multiple upper load-bearing cables 4 form a prestressed tensioned flexible structure, and the counterweight of the combined counterweight block group 3 is adjusted to form a symmetrical balanced force condition;

[0031] The lower membrane structure stabilizing cable 51 at the top of the membrane roof structure 5 is connected to the lower membrane structure stabilizing cable 51 through the vertical suspension cable 41. The vertical suspension cable 41 gradually shortens from both sides to the middle, so that the membrane roof structure 5 forms an arc structure with a high middle and low sides, so that rainwater can be drained to both sides of the membrane roof structure 5.

[0032] Example

[0033] Taking a central main canal as an example, the main components of the present invention are introduced as follows:

[0034] The water conveyance main channel 1 is an open water conveyance channel. The channel is generally an artificial concrete lined flow channel with no cover on top. There are generally horseways 11 on both sides of the lined channel for operation inspection and transportation and maintenance equipment. The horseway 11 is a concrete or asphalt pavement. There are generally buffer protection forest belts on both sides of the horseway 11 for closed management and to ensure water quality safety. The span of the water conveyance main channel 1 is 80m-120m.

[0035] The self-supporting frame structures 2 are arranged in pairs and are arranged according to the width and clearance (such as 4.5m) of the channel horseway 11. A pulley block 21 is arranged on the top of the self-supporting frame structure 2. A combined counterweight block group 3 and a limiting device 31 are arranged on the side of the self-supporting frame structure 2 away from the water supply main channel 1. The combined counterweight block group 3 is a prefabricated concrete structural member.

[0036] The pulley blocks 21 are arranged in pairs and are used to bear and transfer the load of the upper load-bearing cables 4. They are constrained in the direction perpendicular to the upper load-bearing cables 4 and are unconstrained in the longitudinal direction of the upper load-bearing cables 4. The entire flexible structure can slide freely along the span direction according to the force and load conditions.

[0037] The combined counterweight block group 3 is a prefabricated concrete structural member, which can be prefabricated with plain concrete or other materials. The combined counterweight block group 3 is provided with a limit device 31 (such as a positioning pin, a limit pin, a limit rod, etc.). The limit device 31 is used to prevent the combined counterweight block group 3 from swinging in directions other than the vertical direction. The unit counterweight of the combined counterweight block group 3 is 500kg, which is convenient for adding and adjusting the counterweight.

[0038] The upper load-bearing cables 4 are in the form of steel strands. The upper load-bearing cables 4 are connected to the combined counterweight blocks 3 on both sides via the pulley blocks 21 on the self-supporting frame structure 2 to form a symmetrical and balanced stress condition. Multiple upper load-bearing cables 4 and corresponding pulley blocks 21 are distributed at a certain interval along the water supply main channel 1 to form a prestressed tensioned flexible structure.

[0039] The membrane roof structure 5 is composed of coated non-woven fabric or PV or polytetrafluoroethylene membrane material.

[0040] The lower membrane structure stabilizing cable 51 is located at the top of the membrane roof structure 5. The lower membrane structure stabilizing cable 51 is connected to the upper load-bearing cable 4 through the vertical suspension cable 41. The vertical suspension cable 41 gradually becomes shorter from both sides to the middle, so that the membrane roof structure 5 forms an arc structure with a high middle and low sides, so that rainwater can be smoothly discharged to both sides of the membrane roof structure 5.

[0041] Taking the double-layer membrane structure of the 90m typical span of the water supply main canal 1 as an example, the single upper load-bearing cable 4 can be 120mm 2 The cross-section steel strand, the single-side double pulley block 21, the spacing between multiple upper load-bearing cables 4 is 10m, then the additional total load of the paired upper load-bearing cables 4 is 1t (taking into account the self-weight of the upper load-bearing cables 4), the single-side combined counterweight block group 3 is more than 0.5t, the combined counterweight block group 3 is prefabricated with plain concrete with positioning pins, the unit counterweight is 500kg, and the volume of a single piece is 0.4m 3 .

[0042] The double-layer membrane roof structure 5 is arranged symmetrically on both sides of the water conveyance trunk canal 1, and can be arranged in pairs along the water flow direction of the water conveyance trunk canal 1 to form a large-area roof covering structure along the long-distance water conveyance trunk canal.

[0043] Other parts not described belong to the prior art.

Claims

1. Post-balanced large-span double-layer cable-suspended membrane roof structure, Features: It comprises a water conveyance main channel (1), a self-supporting frame structure (2) located on a horseway (11) on both sides of the water conveyance main channel (1), a pulley block (21) located on the top of the self-supporting frame structure (2), a combined counterweight block group (3) located on the side of the self-supporting frame structure (2) away from the water conveyance main channel (1), an upper load-bearing cable (4) and a membrane roof structure (5); A plurality of pulley blocks (21) are arranged at intervals on the top of the self-supporting frame structure (2), and both ends of the upper load-bearing cable (4) are connected to the combined counterweight block group (3) through the pulley blocks (21); The membrane roof structure (5) is an arc-shaped structure with a high middle and low sides. A plurality of lower membrane structure stabilizing cables (51) are arranged on the top of the membrane roof structure (5). The upper load-bearing cables (4) are connected to the lower membrane structure stabilizing cables (51) via vertical suspension cables (41). The pulley block (21) is used to carry and transfer the load of the upper load-bearing cable (4). It is constrained in the direction perpendicular to the upper load-bearing cable (4) and is unconstrained in the longitudinal direction along the upper load-bearing cable (4). The entire flexible structure slides freely along the span direction according to the force and load conditions, and can well adapt to various temporary loads caused by strong winds, heavy rains, heavy snow, and thermal expansion and contraction deformation caused by temperature changes. The post-mounted balanced counterweight large-span double-layer cable suspension membrane roof structure does not require ground anchoring, pre-embedding or other anchoring and fixing facilities; The entire structure can be assembled and disassembled on site, and the weight can be adjusted, which is suitable for temporary covering and insulation. The combined counterweight block group (3) is provided with a limiting device (31); The combined counterweight block group (3) is a prefabricated concrete structural member, the upper load-bearing cable (4) is a steel strand, and the membrane roof structure (5) is composed of a coated non-woven fabric or PV or polytetrafluoroethylene membrane material.

2. A method for using the rear-mounted balanced counterweight large-span double-layer cable-suspended membrane roof structure according to claim 1, It is characterized in that The following steps are involved: Step 1: a self-supporting frame structure (2) is arranged according to the width and clearance of the bridleway (11), a pulley block (21) is arranged on the top of the self-supporting frame structure (2), and a combined counterweight block group (3) and a limit device (31) are arranged on the side of the self-supporting frame structure (2) away from the water supply main channel (1); Step 2: A plurality of pulley blocks (21) are distributed at a certain interval, and the upper load-bearing cables (4) are connected to the combined counterweight block group (3) via the pulley blocks (21) on the frame structure (2). The plurality of upper load-bearing cables (4) form a prestressed tensioned flexible structure, and the counterweight of the combined counterweight block group (3) is adjusted to form a symmetrical balanced force condition; The lower membrane structure stabilizing cable (51) at the top of the membrane roof structure (5) is connected to the lower membrane structure stabilizing cable (51) via the vertical suspension cable (41), and the vertical suspension cable (41) gradually becomes shorter from both sides to the middle, so that the membrane roof structure (5) forms an arc structure with a high middle and low sides, so that rainwater is drained to both sides of the membrane roof structure (5).

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