A super-high ground-type scaffolding for people to walk on in a hyperbolic cooling tower and its erection method

Abstract

The invention discloses an ultra-high ground-type scaffolding for people walking in a hyperbolic cooling tower and a method for erecting the same. The invention comprises a hyperbolic cooling tower and a T-shaped scaffolding body. The cooling tower comprises a bottom plate and a cylinder wall. The scaffolding body is erected by steel pipes. The scaffolding body is eccentrically arranged inside the cooling tower. The scaffolding body comprises a walking passage, an enlarged foot and a man-passing passage which are supported on the bottom plate and connected together. The enlarged foot is located on two opposite sides of the walking passage, and the man-passing passage is located on the other side of the walking passage close to the cylinder wall. The enlarged foot is connected to the cylinder wall through a cable wind rope, and the end of the man-passing passage is connected to the cylinder wall through a wall connecting rod. The invention arranges the scaffolding in a "T" shape, and the enlarged foot is erected on both sides of the walking passage. The walking passage and the enlarged foot are supported by double vertical poles below, thereby increasing the lateral rigidity of the walking passage scaffolding and improving the stability of the walking passage.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to an ultra-high ground-type scaffolding for people to walk on in a hyperbolic cooling tower and a method for erecting the same. Background Art

[0002] Hyperbolic cooling towers are widely used in thermal power plants, large salt chemical plants and other similar factories and mines due to their good water-saving, economical and durable performance. They are composed of cast-in-place reinforced concrete water storage tanks, cylinders (including herringbone columns, ring beams, cylinder walls, rigid rings), tower cores, sprinkler devices and auxiliary supporting devices. Among them, the cast-in-place reinforced concrete cylinder walls of cooling towers have large vertical transportation volume, complex and changeable shapes (continuously changing diameter, slope and cross-section with changes in elevation), high tower height and thin walls. The construction is high-altitude work, requiring special construction technology and machinery, and the construction is difficult. At present, the inverted formwork method is the most mature construction method for small and medium-sized reinforced concrete hyperbolic cooling towers below 3,000 square meters in my country. During the construction of the guide formwork method, since the template is turned up layer by layer, how to safely reach the upper working surface from the bottom of the cooling tower is a problem that must be solved during construction. Large cooling towers can use curved elevators to solve the problem of vertical transportation of personnel, but the investment cost is large, the preparation time for entering and leaving the site is long, and it needs to be equipped with special personnel for operation. For small and medium-sized cooling towers below 80m, how to use on-site materials to economically and effectively solve the upper and lower working surfaces of construction workers is an urgent proposition to be solved. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an ultra-high ground-type scaffolding for people to climb in a hyperbolic cooling tower and a method for erecting the same.

[0004] The technical solution of the present invention is: an ultra-high ground-type scaffolding for access to a hyperbolic cooling tower, comprising a hyperbolic cooling tower and a T-shaped scaffolding body, wherein the cooling tower comprises a bottom plate and a cylinder wall, the scaffolding body is erected by steel pipes, the scaffolding body is eccentrically arranged inside the cooling tower, the scaffolding body comprises an access passage, an enlarged foot and a manhole supported on the bottom plate and connected together, the enlarged foot is located on two opposite sides of the access passage, the manhole is located on the other side of the access passage close to the cylinder wall, the enlarged foot is connected to the cylinder wall by a cable wind rope, and the end of the manhole is connected to the cylinder wall by a wall connecting rod.

[0005] Preferably, the inner surface of the cylinder wall is provided with embedded steel plates spaced apart from each other, and the inner side of the embedded steel plates is provided with steel bar anchor claws.

[0006] Preferably, one end of the guy rope is connected to the embedded steel plate, and the other end is connected to the steel pipe on the enlarged foot.

[0007] Preferably, one end of the wall connecting rod is connected to the embedded steel plate, and the other end is connected to the steel pipe at the end of the passage through a fastener.

[0008] Preferably, a special-shaped round steel is welded on the surface of the embedded steel plate connected to the cable wind rope, both ends of the special-shaped round steel are welded to the embedded steel plate, and the middle part is a connecting ring protruding outward, and the cable wind rope is a steel wire rope, one end of the steel wire rope passes through the connecting ring and is connected to the steel pipe of the enlargement foot, and a basket bolt is arranged on the steel wire rope near the enlargement foot.

[0009] Preferably, a sleeve is welded on the surface of the embedded steel plate connected to the wall connecting rod, and an angled round steel is welded on the end of the wall connecting rod, one end of the angled round steel is inserted into the sleeve, and the other end is welded to the connecting rod.

[0010] Preferably, a lightning protection round steel is provided inside the cylinder wall penetrating vertically, and a steel anchor claw of at least one embedded steel plate connected to the wall connecting rod is welded to the lightning protection round steel.

[0011] Preferably, the access passage is provided with a circularly arranged access ladder and a turning platform, and a stairwell is provided between the access ladder and the turning platform.

[0012] Preferably, the steel pipes of the scaffolding body include vertical poles, horizontal poles, vertical scissors braces and horizontal scissors braces connected by fasteners, the enlarged feet and the access passage have double vertical poles below and a single vertical pole above, the entire access passage is a single vertical pole, the double vertical poles include two vertical steel pipes tied together by fasteners, and the single vertical pole is a vertical steel pipe.

[0013] A method for erecting an ultra-high ground-type scaffolding for people to walk on in a hyperbolic cooling tower comprises the following steps:

[0014] Step 1: Plane layout of scaffolding: The vertical poles of the access passage, the enlarged foot and the passage are arranged in a T shape and stand on the bottom plate of the cooling tower. The crossbars are placed inside the vertical poles. The crossbars are fastened to the vertical poles with right-angle fasteners. The crossbars are connected with the crossbars with butt fasteners. Vertical and horizontal sweeping rods are set at the bottom.

[0015] Step 2: Scaffolding facade layout: The length of the manhole shrinks inward or extends outward as the radius of the cooling tower wall changes. Continuous vertical scissor braces are set on the periphery of the scaffolding, and horizontal scissor braces are set at intervals inside. A safety net is set on the periphery of the scaffolding;

[0016] Step 3: Wall connecting rod construction: As the height of the scaffolding increases, a layer of wall connecting rods is set at a certain distance, and a pre-buried steel plate is buried on the cylinder wall. The angled round steel welded on the wall connecting rod is inserted into the sleeve on the pre-buried steel plate;

[0017] Step 4: Install the guy rope: Use steel wire rope as the guy rope, arrange the guy rope at intervals, connect one end of the guy rope to the corner of the enlarged foot, and pass the other end through the special-shaped round steel on the embedded steel plate. Tighten the guy rope with a fall chain, and add a basket bolt near the scaffolding.

[0018] The beneficial effects of the present invention are:

[0019] The present invention arranges the scaffold in a T-shape, sets up enlarged feet on both sides of the access passage, and adopts double vertical poles to support the access passage and the enlarged feet, thereby increasing the lateral rigidity of the scaffold of the access passage and improving the stability of the access passage.

[0020] In the scaffolding of the present invention, the enlarged foot is connected to the cooling tower wall through the wind rope, and the manway is connected to the cooling tower wall through the wall connecting rod, which further increases the transverse and longitudinal rigidity of the manway, ensuring that when the manway scaffolding is raised with the tower body construction, the upper part of the channel will not swing due to wind load and dynamic load.

[0021] In the present invention, the embedded steel plates connected with the wall connecting rods are connected with the lightning protection round steels in the cylinder wall, thereby forming a lightning protection system for the scaffold body.

[0022] The guy rope and the wall connecting rod of the present invention are convenient and quick to install and disassemble, have a simple and reliable structure, a high safety factor, and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the plan layout of the scaffolding for people to climb;

[0024] Figure 2 This is a schematic diagram of the elevation layout of the scaffolding for people to climb;

[0025] Figure 3 It is a schematic elevation diagram of the connection node where the wind cable is connected to the cooling tower wall;

[0026] Figure 4 It is a plane diagram of the connection node between the wind cable and the cooling tower wall;

[0027] Figure 5 It is a schematic elevation diagram of the connection node between the manway and the cooling tower wall;

[0028] Figure 6 It is a schematic elevation diagram of the connection node of the lightning protection structure;

[0029] In the figure: 1. Bottom plate, 2. Cylinder wall, 3. Access passage, 3-1. Access ladder, 3-2. Turning platform, 3-3. Ladder shaft, 4. Enlarged foot, 5. Access passage, 6. Wall connecting rod, 7. Vertical rod, 8. Cross rod, 9. Cable wind rope, 10. Basket bolt, 11. Vertical scissors brace, 12. Horizontal scissors brace, 13. Embedded steel plate, 14. Special-shaped round steel, 15. Sleeve, 16. Angle round steel, 17. Fastener, 18. Lightning protection round steel. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is shown in Figure 1-6 :

[0031] A super-high floor-standing scaffolding for people to climb in a hyperbolic cooling tower, such as Figure 1-6 , including a hyperbolic cooling tower and a T-shaped scaffolding body, the cooling tower includes a bottom plate 1 and a cylinder wall 2, the inner surface of the cylinder wall 2 is provided with embedded steel plates 13 arranged at intervals up and down, and the inner side of the embedded steel plate 13 is provided with steel bar anchor claws, the scaffolding body is erected by steel pipes, and the scaffolding body is eccentrically arranged inside the cooling tower, and the scaffolding body includes a manhole 3, an enlarged foot 4 and a manhole 5 supported on the bottom plate 1 and connected together, the enlarged foot 4 is located on the opposite sides of the manhole 3, and the manhole 5 is located on the manhole 3 near the cylinder wall 2 On the other side, the access passage 3 is provided with a circularly arranged access ladder 3-1 and a turning platform 3-2, between which is a ladder shaft 3-3, the steel pipes of the scaffolding body include vertical poles 7, horizontal poles 8, vertical scissor braces 11 and horizontal scissor braces 12 connected by fasteners 17, the lower part of the enlarged foot 4 and the access passage 3 is a double vertical pole 7, the upper part is a single vertical pole 7, the whole of the passage 5 is a single vertical pole 7, the double vertical pole 7 includes two vertical steel pipes tied together by fasteners 17, and the single vertical pole 7 is a vertical The enlarged foot 4 is connected to the cylinder wall 2 through the cable wind rope 9, and the end of the manhole 5 is connected to the cylinder wall 2 through the wall connecting rod 6. One end of the cable wind rope 9 is connected to the embedded steel plate 13, and the other end is connected to the steel pipe on the enlarged foot 4. One end of the wall connecting rod 6 is connected to the embedded steel plate 13, and the other end is connected to the steel pipe at the end of the manhole 5 through a fastener 17. The surface of the embedded steel plate 13 connected to the cable wind rope 9 is welded with a special-shaped round steel 14. The two ends of the special-shaped round steel 14 are welded to the embedded steel plate 13, and the middle part is a connecting ring protruding outward. The rope 9 is a steel wire rope, one end of which passes through a connecting ring and is connected to the steel pipe of the enlarged foot 4. A basket bolt 10 is arranged on the steel wire rope near the enlarged foot 4. A sleeve 15 is welded on the surface of the embedded steel plate 13 connected to the wall connecting rod 6. A bent angle round steel 16 is welded on the end of the wall connecting rod 6. One end of the bent angle round steel 16 is inserted into the sleeve 15 and the other end is welded to the connecting rod. A lightning protection round steel 18 is arranged inside the cylinder wall 2 and passes through the interior thereof. At least one steel bar anchor claw of the embedded steel plate 13 connected to the wall connecting rod 6 is welded to the lightning protection round steel 18.

[0032] The method for erecting a scaffold for people to walk on in the present invention comprises the following steps:

[0033] Step 1, scaffolding plane layout: the vertical poles 7 of the access passage 3, the enlarged foot 4 and the passage 5 are arranged in a T shape and stand on the bottom plate 1 of the cooling tower. The plane dimensions of the access passage 3 and the enlarged foot 4 are 9200mm×6000mm, of which the width of the access passage 3 is 4000mm, the width of the enlarged foot 4 on both sides is 2600mm, and the width of the passage 5 is 4000mm. The crossbar 8 is placed on the inner side of the vertical pole 7, and the crossbar 8 is fastened to the vertical pole 7 with a right-angle fastener 17. The horizontal distance of the vertical pole 7 is 1.3m, the vertical distance is 1.2m, and the step distance is 1.6m. The crossbars 8 are connected with the crossbars 8 with butt fasteners 17. The butt joints are staggered and should not be set in the same synchronization and span. The horizontal spacing between adjacent joints is not less than 500mm.

[0034] Step 2, scaffolding facade layout: The scaffolding is set up at a height of 72m, with a single vertical pole 7 at the upper 35.2m and a double vertical pole 7 at the lower 36.8m. The lower part of the frame is set up with longitudinal and transverse sweeping poles, and the width of the manway 5 is 4000mm. The length of the manway 5 shrinks inward or extends outward as the radius of the cooling tower wall 2 changes. Continuous vertical scissor braces 11 are set on the periphery of the scaffolding, and horizontal scissor braces 12 arranged at intervals are set inside. A safety net is also set on the periphery of the scaffolding; the vertical scissor braces 11 are continuously set over the entire length and height of the outer facade, and are fixed to the protruding end of the cross bar 8 or the vertical pole 7 intersecting therewith with a rotating fastener 17, and the center line of the rotating fastener 17 is to The distance between the main nodes shall not be greater than 150mm. The vertical scissors brace 11 diagonal rod extension should be overlapped, and the overlap length should not be less than 1m. It should be fixed with no less than 2 rotating fasteners 17. The distance from the edge of the end fastener 17 cover plate to the rod end should not be less than 100mm. The width of each vertical scissors brace 11 should not be less than 4 spans and should not be less than 6m. The angle between the diagonal rod and the horizontal line should be between 45° and 60°. The horizontal scissors brace 12 is arranged at intervals. The horizontal scissors brace 12 is connected to the vertical rod 7, especially the four corner vertical rods 7 should be connected as a whole with fasteners 17. The width of each horizontal scissors brace 12 shall not be less than 4 spans and should not be less than 6m. The angle between the diagonal rod and the horizontal line should be between 45° and 60°.

[0035] Step 3, construction of wall connecting rods 6: as the height of the scaffolding increases, a layer of wall connecting rods 6 is set every 3.9m, and embedded steel plates 13 are correspondingly buried on the cylinder wall 2 (150×150×10mm embedded steel plates 13 with Ф28 sleeves 15 welded on them). There are 6 embedded steel plates 13 in each layer with a vertical spacing of 3.9m. The angled round steel 16 welded on the wall connecting rods 6 is inserted into the sleeves 15 on the embedded steel plates 13.

[0036] Step 4, install the cable wind rope 9: use a steel wire rope with a diameter of 16 as the cable wind rope 9, one end of the cable wind rope 9 is connected to the corner of the enlarged foot 4, and the other end passes through the special-shaped round steel 14 on the embedded steel plate 13. The cable wind rope 9 is tightened with a fall chain, and a basket bolt 10 is added near the scaffolding. Two cables 9 are set at 30 meters in the lower part of the scaffolding and one cable wind rope is set every 10 meters in the upper part.

[0037] The steps of dismantling the scaffold of the present invention are as follows:

[0038] 1) The dismantling procedure should follow the principle of top-down, first erection and then dismantling. The general dismantling order is safety net →→ scissors brace → horizontal bar 8 → vertical bar 7.

[0039] 2) It is not allowed to dismantle the scaffolding in sections or in two steps at the same time. Clear each step and each pole at a time. When dismantling the vertical pole 7, hold the vertical pole 7 first and then remove the last two buckles. When dismantling the cross bar 8 and the scissors brace, remove the middle fastener 17 first, then hold the middle, and then release the end buckle. All wall ties 6 must be lowered synchronously with the dismantling of the scaffolding. It is strictly forbidden to dismantle the wall ties 6 for an entire layer or several layers before dismantling the scaffolding. The height difference of the segmented dismantling should not be greater than 2 steps. If the height difference is greater than 2 steps, additional wall ties 6 should be added for reinforcement.

[0040] 3) The stability of the frame will not be destroyed after dismantling. For example, before the wall connecting rod 6 is dismantled, temporary support should be added to prevent deformation. When dismantling each standard section, instability should be prevented.

[0041] 4) When the scaffolding is dismantled to the height of the last long steel pipe at the bottom (about 6m), temporary support should be erected at appropriate locations for reinforcement before the wall connections are removed.

[0042] 5) When the wall connecting rod 6 is removed, the scaffolding and the tube wall 2 are connected with the sleeve 15 on the reserved steel plate of the tube wall 2 by welding the angled round steel 16 at the end of the wall connecting rod 6. The fastener 17 at the connection between the wall connecting rod 6 and the scaffolding can be directly unfastened, and the wall connecting rod 6 can be lifted upward.

[0043] 6) When the guy rope 9 is removed, since double steel wire ropes are used, the steel wire ropes can be untied at the enlarged foot 4, and then the steel wire ropes can be pulled out from the connecting ring of the special-shaped round steel 14.

Claims

1. A method for erecting an ultra-high floor-standing scaffolding in a hyperbolic cooling tower, characterized in that: The following steps are involved: Step 1: Plane layout of scaffolding: The vertical poles of the access passage, the enlarged foot and the passage are arranged in a T shape and stand on the bottom plate of the cooling tower. The crossbars are placed inside the vertical poles. The crossbars are fastened to the vertical poles with right-angle fasteners. The crossbars are connected with the crossbars with butt fasteners. Vertical and horizontal sweeping rods are set at the bottom. Step 2: Scaffolding facade layout: The length of the manhole shrinks inward or extends outward as the radius of the cooling tower wall changes. Continuous vertical scissor braces are set on the periphery of the scaffolding, and horizontal scissor braces are set at intervals inside. A safety net is set on the periphery of the scaffolding; Step 3: Wall connecting rod construction: As the height of the scaffolding increases, a layer of wall connecting rods is set at a certain distance, and a pre-buried steel plate is buried on the cylinder wall. The angled round steel welded on the wall connecting rod is inserted into the sleeve on the pre-buried steel plate; Step 4: Install the guy rope: Use steel wire rope as the guy rope, arrange the guy rope at intervals, connect one end of the guy rope to the corner of the enlarged foot, and pass the other end through the special-shaped round steel on the embedded steel plate. Tighten the guy rope with a fall chain, and add a basket bolt near the scaffolding. An ultra-high ground-type access scaffolding in a hyperbolic cooling tower comprises a hyperbolic cooling tower and a T-shaped scaffolding body, wherein the cooling tower comprises a bottom plate and a cylinder wall, the scaffolding body is erected by steel pipes, the steel pipes of the scaffolding body comprise vertical poles, horizontal poles, vertical scissor braces and horizontal scissor braces connected by fasteners, the scaffolding body is eccentrically arranged inside the cooling tower, the scaffolding body comprises an access passage, an enlarged foot and a manhole supported on the bottom plate and connected together, the enlarged foot is located on two opposite sides of the access passage, the manhole is located on the other side of the access passage close to the cylinder wall, the enlarged foot and the access passage have double vertical poles below and single vertical pole above, the entire manhole is a single vertical pole, the double vertical poles comprise two vertical steel pipes bound together by fasteners, and the single vertical pole is a vertical steel pipe; The inner surface of the cylinder wall is provided with embedded steel plates arranged at intervals up and down, and the inner side of the embedded steel plates is provided with steel bar anchor claws, one end of the cable wind rope is connected to the embedded steel plate, and the other end is connected to the steel pipe on the enlarged foot, one end of the wall connecting rod is connected to the embedded steel plate, and the other end is connected to the steel pipe at the end of the passage through a fastener; A special-shaped round steel is welded on the surface of the embedded steel plate connected to the cable wind rope, the two ends of the special-shaped round steel are welded to the embedded steel plate, and the middle part is a connecting ring protruding outwards, the cable wind rope is a steel wire rope, one end of the steel wire rope passes through the connecting ring and is connected to the steel pipe of the enlarged foot, and the steel wire rope is provided with a basket bolt at a position close to the enlarged foot; A sleeve is welded on the surface of the embedded steel plate connected to the wall connecting rod, and a folded angle round steel is welded on the end of the wall connecting rod. One end of the folded angle round steel is inserted into the sleeve, and the other end is welded to the connecting rod.

2. The method for erecting a super-high floor-standing scaffolding in a hyperbolic cooling tower according to claim 1, characterized in that: A lightning protection round steel is provided inside the cylinder wall and penetrates vertically, and a steel bar anchor claw of at least one embedded steel plate connected to the wall connecting rod is welded to the lightning protection round steel.

3. The method for erecting an ultra-high floor-standing scaffolding in a hyperbolic cooling tower according to claim 1, characterized in that: The access passage is provided with a circularly arranged access ladder and a turning platform, and a ladder shaft is provided between the access ladder and the turning platform.

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