Split type double-pulley double-steel-wire-rope tensioning hanging basket construction method for old renovation project

Abstract

The invention discloses a construction method for a split type double-pulley double-steel-wire-rope tensioning hanging basket of an old renovation project, and the construction method comprises the steps that two second pulley devices are newly added, and each second pulley device comprises an angle steel connecting seat, a second pulley mounting seat, a second tensioning pulley, a split screw rod and a fastening bolt; a through hole matched with the first tensioning pulley is punched in the side face, close to the first tensioning pulley, of the top of the front supporting leg of the support, one side plate of each angle steel connecting base is attached to the front supporting leg of the support and penetrates through the front supporting leg of the support through a split screw, and the two angle steel connecting bases are fixed to the front supporting leg through fastening bolts. The other side plate of the angle steel connecting seat is horizontal, a second pulley mounting seat is mounted at the top of the angle steel connecting seat, a second steel wire rope is tensioned at the top of a second tensioning pulley, and the second steel wire rope penetrates through a position between the lower part of the first tensioning pulley and the first tensioning pulley to separate the first steel wire rope from the second steel wire rope; the influence on the structural stability of the hanging basket bracket due to mutual interference is avoided, and the construction safety is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the field of construction hanging baskets, and particularly relates to a construction method for a split double-pulley and double-steel-wire tensioning hanging basket for renovation projects. Background Technique

[0002] Nowadays, the facades of various buildings have diverse shapes, which has promoted the rapid development of the hanging basket industry. Standard hanging baskets have evolved into various non-standard forms to meet the needs of construction sites. When the outer length of the counterweight suspension bracket of the standard hanging basket required by the national standard is greater than 1.7 meters, a separate stability check shall be carried out. In actual engineering applications, special-shaped hanging baskets with double-force steel wires are mostly used to meet the situation where the front-end overhanging length of the hanging basket is greater than 1.7 meters. Among them, the common size is an overhang of 2.3 meters.

[0003] In addition, the term "urban renewal" was first proposed at the Central Economic Work Conference in December 2019. In recent years, the renovation projects of old residential areas have been increasing day by day. The protruding overhanging balconies make it difficult to use standard hanging baskets during the facade renovation of renovation projects. Because the national standard requires that when the front support of the suspension mechanism needs to be supported on a non-load-bearing structure (such as an overhanging member), special design and reinforcement measures must be taken. It is impossible to enter the households in the renovation projects of old residential areas to take reinforcement measures. Therefore, a large number of renovation projects need to use hanging baskets with extremely long front-end overhangs to meet the facade decoration needs.

[0004] In the prior art, the two steel wires need to share the same pulley at the top of the front leg, resulting in increased friction between the steel wires during the tensioning process, a decrease in stability of about, and an increased risk of pulley jamming; or the second steel wire is directly placed on the square steel at the top of the front leg, resulting in the steel wire directly rubbing against the hanging basket frame body, which further aggravates its wear.

[0005] The functions of the hanging basket pulley are, first, to support and fix the steel wire to ensure its stability without shaking; second, through the design of the pulley, to reduce the frictional resistance of the steel wire during movement, making the lifting and lowering of the hanging basket smoother. In order to ensure that the hanging basket support can meet the structural stability, it is necessary to add a steel wire reinforcement in the middle of the cross beam of the hanging basket support. The technology can refer to the specification drawings of the patent with the publication number CN114876176A. However, due to the tensioning of two steel wires, the two steel wires pass through the pulley at the top of the front leg for guiding and tensioning at the same time, which is easy to interfere with each other and affect the structural stability of the hanging basket support, thus bringing potential safety hazards to the construction. Construction safety is the primary task of building construction. Therefore, the above-mentioned defects need to be overcome. Summary of the Invention

[0006] The present invention provides a construction method for a split double-pulley and double-steel-wire tensioning hanging basket for renovation projects to solve the technical problems mentioned in the background technique.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A construction method for a split double-pulley double-steel wire rope tensioning hanging basket in a renovation project, comprising the following steps. Step 1, preparation before construction: Obtain the conventional components required for the bracket of the ultra-long cantilever hanging basket. The conventional components include the front leg of the bracket, the rear leg of the bracket, the bracket cross beam, the counterweight, the hanging basket and the lifting steel wire rope. At both ends of the cross beam, there is a first tensioning flower basket bolt connecting the first steel wire rope. In the middle of the overhanging area of the bracket cross beam and in the middle of the bracket cross beam between the front leg and the rear leg of the bracket, there is a second tensioning flower basket bolt. At the top of the front leg of the bracket, there is a first tensioning pulley. The first tensioning pulley includes a first pulley mounting seat and a first tensioning pulley, and two second pulley devices are newly added. The second pulley device includes an angle steel connecting seat, a second pulley mounting seat, a second tensioning pulley, a tie rod and a fastening bolt. A perforation matching the first tensioning pulley is made on the side of the top of the front leg of the bracket close to the first tensioning pulley. One side plate of the angle steel connecting seat is attached to the front leg of the bracket and penetrated by the tie rod. The two angle steel connecting seats are fixed on the front leg by the fastening bolt. The other side plate of the angle steel connecting seat is installed horizontally and the second pulley mounting seat is installed on the top. The second tensioning pulley tensions the second steel wire rope at the top. The second steel wire rope is arranged at the position between the first tensioning pulley and below the first tensioning pulley and passes through the position between the first tensioning pulley and below the first tensioning pulley; Step 2, install the second pulley device on the front leg of the bracket through the tie rod, and install the front leg of the bracket, the rear leg of the bracket, the bracket cross beam and the counterweight according to the layout position; Step 3, install the first steel wire rope. After the first steel wire rope passes through the first tensioning pulley, it is tensioned and fastened by the flower basket bolts at both ends; Step 4, install the second steel wire rope. The second steel wire rope passes through the position between the first tensioning pulley and below the first tensioning pulley and passes through the two second tensioning pulleys, and then is tensioned by the flower basket bolts at both ends of the second steel wire rope; Step 5, install the hanging basket and the lifting steel wire rope at the overhanging end of the cross beam.

[0008] By adopting the above technical solutions, the advantages of this construction method are as follows: 1. A second pulley device is added to separate the first steel wire rope and the second steel wire rope, avoiding mutual interference and affecting the structural stability of the hanging basket support, and ensuring construction safety; 2. A second pulley device with a suitable structure is proposed and arranged in pairs at the top of the front leg of the support. The second steel wire rope is ingeniously supported by passing through the gap between the first pulley and the steel wire rope, and the structure is compact and reasonable; 3. The second pulley device supports the tensioning node of the second steel wire rope reasonably. By adopting two second tensioning pulleys close to each other, the structural stability can be increased several times compared with the first tensioning in terms of reinforcement bearing capacity; 3. The installation of the second pulley device does not require complex transformation of the top of the front leg. It only needs to be installed after drilling, without damaging the original structure. After disassembly, it can be used in the case of a small overhanging length and can be adapted to single-steel wire rope tensioning; 4. The second pulley device has a simple structure but high strength, can effectively support and ensure the tensile force.

[0009] Preferably, the turning angle of the second steel wire rope on the second tensioning pulley is 145°.

[0010] By adopting the above technical solutions, the overall structural shape of the second steel wire rope has a high structural tension strength.

[0011] Preferably, there are four tie rods and they are distributed at the four corners of the side plate of the angle steel connecting seat.

[0012] By adopting the above technical solutions, the connection strength between the angle steel connecting seat and the front leg is high.

[0013] Preferably, a diagonal bracing triangular plate is arranged inside the angle steel connecting seat.

[0014] By adopting the above technical solutions, the structural strength of the angle steel connecting seat can be ensured.

[0015] Preferably, there are two diagonal bracing triangular plates arranged side by side at intervals.

[0016] By adopting the above technical solutions, the structural strength is higher.

[0017] Preferably, a vertical reinforcing square pipe is arranged inside the angle steel connecting seat, and the reinforcing square pipe is welded to the two sides of the angle steel connecting seat respectively.

[0018] By adopting the above technical solutions, reinforcement can also be carried out by setting the reinforcing square pipe.

[0019] Preferably, the distance between the second steel wire rope and the top of the floor of the first pulley mounting seat is not less than 1 cm.

[0020] By adopting the above technical solution, the second steel wire rope has a flexible space, which facilitates installation and tensioning.

[0021] Preferably, the distance between the closest parts of the first steel wire rope and the second steel wire rope is not less than 5 cm.

[0022] By adopting the above technical solution, the influence between the two steel wire ropes is avoided.

[0023] The beneficial effects of the present invention are reflected in: 1. A second pulley device is added to separate the first steel wire rope and the second steel wire rope, avoiding mutual interference and affecting the structural stability of the hanging basket support, and ensuring construction safety; 2. A second pulley device with a suitable structure is proposed, which is arranged in pairs at the top of the front leg of the support, and the second steel wire rope is ingeniously supported by using the gap between the first pulley and the steel wire rope, and the structure is compact and reasonable; 3. The second pulley device supports the tensioning node of the second steel wire rope reasonably, and two second tensioning pulleys close to each other are adopted, which can improve the structural stability several times compared with the first tensioning in terms of reinforcement bearing capacity; 3. The installation of the second pulley device does not require complex transformation of the top of the front leg, and only needs to be installed after drilling, without damaging the original structure. After disassembly, it can be used in the case of a small overhanging length and can be adapted to single-steel wire rope tensioning; 4. The second pulley device has a simple structure but high strength, and can effectively support and ensure the tensile force. The second pulley device of the present invention adopts a split design, and realizes modular rapid installation through angle steel connecting seats and tie rods, without welding or cutting the original support, and realizes the "split pulley layout" and "modular installation" of special-shaped hanging baskets. The present invention realizes independent tensioning of double steel wire ropes, completely eliminates the friction interference caused by traditional common pulleys, improves the stability of the support, reduces the wear of the steel wire rope during use, and is applicable to high-risk working conditions with an overhanging length exceeding 1.7 meters, especially applicable to the renovation projects of old urban communities in urban renewal.

[0024] Other features and advantages of the present invention will be described in the following description, and will be partially obvious from the description, or will be understood by implementing the present invention; the main purpose and other advantages of the present invention can be realized and obtained through the solutions specifically pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall structural schematic diagram of an embodiment of the present invention; Figure 2 is the schematic diagram of the second pulley device of an embodiment of the present invention; Figure 3 is the side view of the second pulley device of an embodiment of the present invention; Figure 4 is the schematic diagram of the reinforcement of the reinforcement square tube in an embodiment of the present invention.

[0026] Reference numerals: 1, front support leg of the bracket; 2, rear support leg of the bracket; 3, cross beam of the bracket; 4, counterweight; 5, hanging basket and lifting steel wire rope; 6, first pulley device; 61, first steel wire rope; 62, first pulley mounting seat; 63, first tensioning pulley; 7, second pulley device; 71, angle steel connecting seat; 72, second pulley mounting seat; 73, second tensioning pulley; 74, tie rod; 75, fastening bolt; 76, second steel wire rope; 77, diagonal bracing triangular plate; 78, reinforcing square tube. Specific implementation mode

[0027] The technical solution of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and cannot be construed as a limitation to the technical solution of the present invention.

[0028] Combined with Figures 1-4 , a construction method for a split double-pulley double-steel wire rope tensioning hanging basket in a renovation project, includes the following steps. Step 1, preparation before construction, obtain the conventional components required for the bracket of the extra-long cantilever hanging basket. The conventional components include the front support leg 1 of the bracket, the rear support leg 2 of the bracket, the cross beam 3 of the bracket, the counterweight 4, the hanging basket and the lifting steel wire rope 5. At both ends of the cross beam, there is a first tensioning flower basket bolt connecting the first steel wire rope 61. In the middle of the overhanging area of the bracket cross beam 3 and in the middle of the bracket cross beam 3 between the front support leg 1 and the rear support leg 2 of the bracket, there is a second tensioning flower basket bolt. At the top of the front support leg 1 of the bracket, there is a first tensioning pulley 63. The first tensioning pulley 63 includes a first pulley mounting seat 62 and a first tensioning pulley 63, and two new second pulley devices 7 are added. The second pulley device 7 includes an angle steel connecting seat 71, a second pulley mounting seat 72, a second tensioning pulley 73, a tie rod 74 and a fastening bolt 75. A perforation matching the first tensioning pulley 63 is made on the side of the top of the front support leg 1 of the bracket close to the first tensioning pulley 63. One side plate of the angle steel connecting seat 71 is attached to the front support leg 1 of the bracket and penetrated by the tie rod 74. The two angle steel connecting seats 71 are fixed on the front support leg by the fastening bolt 75. The other side plate of the angle steel connecting seat 71 is installed horizontally and the second pulley mounting seat 72 is installed at the top. The second tensioning pulley 73 tension the second steel wire rope 76 at the top. The second steel wire rope 76 is arranged at the position between and below the first tensioning pulley 63. Step 2, install the second pulley device 7 on the front support leg 1 of the bracket through the tie rod 74, and install the front support leg 1, the rear support leg 2, the cross beam 3 of the bracket and the counterweight 4 according to the layout position. Step 3, install the first steel wire rope 61. After the first steel wire rope 61 passes through the first tensioning pulley 63, it is tensioned and fastened by the flower basket bolts at both ends. Step 4. Install the second steel wire rope 76. The second steel wire rope 76 passes through the space between and below the first tension pulley 63 and passes through two second tension pulleys 73, and then is tightened by the turnbuckles at both ends of the second steel wire rope 76; Step 5. Install the hanging basket and the lifting steel wire rope 5 at the cantilever end of the cross beam.

[0029] The advantages of this construction method are as follows: 1. The new second pulley device 7 separates the first steel wire rope 61 and the second steel wire rope 76, avoiding mutual interference and affecting the structural stability of the hanging basket support, and ensuring construction safety; 2. A second pulley device 7 with a structurally adapted design is proposed, which is arranged in pairs at the top of the front leg 1 of the support, and cleverly uses the gap between the first pulley steel wire ropes to pass through the second steel wire rope 76 for support, with a compact and reasonable structure; 3. The second pulley device 7 has a reasonable support for the tensioning nodes of the second steel wire rope 76. Two adjacent second tension pulleys 73 are adopted, and in terms of reinforcement bearing capacity, the structural stability can be increased several times compared with the first tensioning; 3. The installation of the second pulley device 7 does not require complex transformation of the top of the front leg. It only needs to be installed after drilling holes, without damaging the original structure. After disassembly, it can be used in the case of a small cantilever length and can be adapted to single-wire rope tensioning; 4. The second pulley device 7 has a simple structure but high strength, and can effectively support and ensure the tensile force. The second pulley device of the present invention adopts a split design and realizes modular rapid installation through the angle steel connecting seat and the tension bolt, without welding or cutting the original support, realizing the "split pulley layout" and "modular installation" of the special-shaped hanging basket. The present invention realizes independent tensioning of double steel wire ropes, completely eliminates the friction interference caused by traditional common pulleys, improves the stability of the support, reduces the wear of the steel wire rope during use, is applicable to high-risk working conditions with a cantilever length exceeding 1.7 meters, and is especially applicable to the renovation projects of old urban communities in urban renewal.

[0030] The turning angle of the second steel wire rope 76 at the second tension pulley 73 is 145°, and the overall structural shape of the second steel wire rope 76 has a high structural tension strength.

[0031] There are four tension bolts 74, which are distributed at the four corners of the side plate of the angle steel connecting seat 71, and the connection strength between the angle steel connecting seat 71 and the front leg is high.

[0032] An inclined support triangular plate 77 is arranged inside the angle steel connecting seat 71, which can ensure the structural strength of the angle steel connecting seat 71.

[0033] There are two inclined support triangular plates 77 arranged side by side at intervals, with higher structural strength.

[0034] On the inner side of the angle steel connecting seat 71, a vertical reinforcing square pipe 78 is provided. The reinforcing square pipe 78 is welded to the two sides of the angle steel connecting seat 71 respectively. Reinforcement can also be carried out by setting the reinforcing square pipe 78.

[0035] The second steel wire rope 76 has a distance of not less than 1 cm from the top of the floor of the first pulley mounting seat 62. The second steel wire rope 76 has a flexible space, which is convenient for installation and tensioning.

[0036] The distance between the closest parts of the first steel wire rope 61 and the second steel wire rope 76 is not less than 5 cm to prevent the two steel wire ropes from affecting each other.

[0037] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A construction method for a split double-pulley double-steel wire rope tensioning hanging basket in a renovation project, characterized in that: It includes the following steps. Step 1: Preparation before construction. Obtain the conventional components required for the bracket of the ultra-long cantilever hanging basket. The conventional components include the front leg (1) of the bracket, the rear leg (2) of the bracket, the crossbeam (3) of the bracket, the counterweight (4), the hanging basket and the hoisting wire rope (5). At both ends of the crossbeam, there is a turnbuckle connecting the first wire rope (61). In the middle of the overhanging area of the bracket crossbeam (3) and in the middle of the bracket crossbeam (3) between the front leg (1) and the rear leg (2) of the bracket, there are turnbuckles and they are connected to the second wire rope (76). At the top of the front leg (1) of the bracket, there is a first pulley device (6). The first pulley device (6) includes a first pulley mounting seat (62) and a first tensioning pulley (63). And two second pulley devices (7) are newly added. The second pulley device (7) includes an angle steel connecting seat (71), a second pulley mounting seat (72), a second tensioning pulley (73), a tie rod (74) and a fastening bolt (75). And a perforation matching the first tensioning pulley (63) is made on the side of the top of the front leg (1) of the bracket close to the first tensioning pulley (63). One side plate of the angle steel connecting seat (71) is attached to the front leg (1) of the bracket and penetrated by the tie rod (74). The two angle steel connecting seats (71) are fixed on the front leg by the fastening bolt (75). The other side plate of the angle steel connecting seat (71) is horizontally installed with the second pulley mounting seat (72) at the top. The second tensioning pulley (73) tensions the second wire rope (76) at the top. The second wire rope (76) is arranged at the position between the lower part and the first tensioning pulley (63) of the first tensioning pulley (63). Step 2: Install the second pulley device (7) on the front leg (1) of the bracket through the tie rod (74), and install the front leg (1) of the bracket, the rear leg (2) of the bracket, the crossbeam (3) of the bracket and the counterweight (4) according to the layout position. Step 3: Install the first wire rope (61). After the first wire rope (61) passes through the first tensioning pulley (63), it is tensioned and fastened by the turnbuckles at both ends. Step 4: Install the second wire rope (76). The second wire rope (76) passes through the position between the lower part and the first tensioning pulley (63) of the first tensioning pulley (63) and passes through the two second tensioning pulleys (73), and then is tensioned by the turnbuckles at both ends of the second wire rope (76). Step 5: Install the hanging basket and the hoisting wire rope (5) at the overhanging end of the crossbeam.

2. The construction method of a split double-pulley and double-steel wire rope tensioning hanging basket for an old renovation project according to claim 1, characterized in that: The turning angle of the second wire rope (76) on the second tensioning pulley (73) is 145°.

3. The construction method of a split double-pulley double-steel wire rope tensioning hanging basket for renovation projects according to claim 2, characterized in that: There are four tie rods (74) and they are distributed at the four corners of the side plate of the angle steel connecting seat (71).

4. The construction method of a split double-pulley double-steel wire rope tensioning hanging basket for renovation projects according to claim 3, characterized in that: An inclined support triangular plate (77) is arranged inside the angle steel connecting seat (71).

5. The construction method of a split double-pulley double-steel wire rope tensioning hanging basket for renovation projects according to claim 4, characterized in that: There are two inclined support triangular plates (77) arranged side by side at intervals.

6. The construction method of a split double-pulley double-steel wire rope tensioning hanging basket for renovation projects according to claim 3, characterized in that: A vertical reinforcing square pipe (78) is arranged inside the angle steel connecting seat (71), and the vertical reinforcing square pipe (78) is welded to the two sides of the angle steel connecting seat (71) respectively.

7. The construction method of a split double-pulley and double-steel-wire-rope tensioning hanging basket for renovation projects according to claim 3, characterized in that: The second steel wire rope (76) has a spacing of not less than 1 cm from the top of the floor of the first pulley mounting seat (62).

8. A construction method of a split double-pulley and double-steel-wire-rope tensioning hanging basket for renovation projects according to claim 3, characterized in that: The spacing between the closest parts of the first steel wire rope (61) and the second steel wire rope (76) is not less than 5 cm.

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