Large-span steel grid daylighting roof three-dimensional crawling high-altitude construction system

Abstract

The invention discloses a large-span steel truss daylighting roof three-dimensional crawling high-altitude construction system, and belongs to the technical field of building construction. The system comprises an operation part and a protection part, the operation part is installed on a steel net rack, and the protection part is installed between two adjacent structural beams below the steel net rack; the operation part is mainly composed of an operation platform, slings and U-shaped square steel, and the protection part is mainly composed of embedded parts, guide rails, hooks and a safety flat net. According to the system, various problems existing in traditional scaffold erection in the large-span ultrahigh roof construction process are solved, the construction difficulty is greatly reduced, the erection and disassembly construction period is shortened, the project construction progress is accelerated, the operation safety of a construction site is guaranteed, the system can be recycled, the construction period is effectively shortened, and the construction cost is reduced. And good social benefits and obvious economic benefits are obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and particularly relates to the construction of a steel grid roof, and specifically is a three-dimensional crawling high-altitude construction system for a large-span steel grid lighting roof. Background Art

[0002] At present, hollow steel grid lighting roof structures are mostly used in public buildings, and they are of great significance in terms of building lighting and decoration. In the construction of building projects, the welding of steel keels, anti-corrosion and fire-proof spraying, installation of lighting roof glass (aluminum plate), sealing and gluing, and other process links of the lighting roof all require workers to provide a working platform. The traditional construction method requires the construction of a full-house scaffolding from the first-floor structural plate to the top floor of the building, and then the template is laid on the top of the scaffolding to provide an operating platform, which will be dismantled after the construction of the lighting roof is completed. The above-mentioned traditional construction methods have the problems of high construction difficulty and long cycle, which affect the overall construction progress; large amount of steel pipes are consumed, and the material rental cost is high; large-area steel pipe scaffolding occupies the site, affecting other professional construction in the lower layer; the erection of super-high scaffolding has safety hazards and other problems. In addition, for large-span steel grid lighting roofs with large building areas, the erection and fixation of safety nets are also important and difficult points in the construction process. Therefore, for the construction of large-span steel grid lighting roofs, we urgently need to develop a new construction technology to solve such problems. Summary of the invention

[0003] The purpose of the present invention is to provide a three-dimensional crawling high-altitude construction system for a large-span steel grid lighting roof, so as to solve the problems existing in the traditional large-span steel grid lighting roof construction, such as great construction difficulty, long construction period, influence on the overall construction progress, large consumption of steel pipes, high material rental cost, large area of ​​steel pipe scaffolding taking up a large area and affecting other professional construction in the lower layer, safety hazards in the erection of super-high scaffolding, and difficulty in setting up and fixing safety nets.

[0004] The present invention is achieved through the following technical solutions: A three-dimensional crawling high-altitude construction system for a large-span steel grid skylight roof comprises an operating part and a protective part. The operating part is installed on the steel grid, and the protective part is installed between structural beams below the steel grid.

[0005] The working part includes a working platform, a sling and a U-shaped square steel. Both ends of the working platform are fixedly connected to the sling. The top end of the sling is suspended on the upper chord of the steel grid, and the rope end of the sling is locked and fixed by a lock; the notch of the U-shaped square steel faces downward and is clamped on the lower chord of the steel grid. A steel wire rope is wound between the U-shaped square steel and the lower chord of the steel grid, and the rope end of the steel wire rope is locked and fixed by a lock; the bottom end of the working platform is supported on the U-shaped square steel, and the working platform and the U-shaped square steel are detachably connected by bolts.

[0006] The protection part includes embedded parts, guide rails, hooks and safety nets. The embedded parts are round steel rods. One end of the round steel rods is formed with a closed circular hoop and the other end is provided with a threaded section. The round steel rods are inserted into the reserved construction holes on the structural beams. The closed circular hoop at one end abuts against the side wall of the structural beam, and the threaded section at the other end is threaded with a fastening nut; the guide rails are installed between the embedded parts, and the two end portions of the guide rails are respectively fixedly connected to the closed circular hoop of the embedded parts; there are multiple hooks, and they are all slidably connected to the guide rails; the safety net is installed between the structural beams, and the two sides of the safety net are respectively fixedly connected to the hooks on the corresponding side guide rails.

[0007] Furthermore, the working platform includes a main beam, a secondary beam, a scaffolding board and a guardrail. The main beam and the secondary beam are vertically arranged and welded into an integral frame. The scaffolding board is laid on the integral frame. The guardrail is arranged around the integral frame and is fixedly connected to the integral frame. The outer periphery of the integral frame is welded and fixed with a lifting ring for connecting a sling and a hook for lifting the working platform.

[0008] Furthermore, dampers are installed at both ends of the overall frame.

[0009] Furthermore, two lock buckles are provided at the rope end of the sling, and the length of the last lock buckle from the rope end is not less than 100 mm; limit blocks are provided on both sides of the connection between the sling and the upper chord of the steel grid, and the limit blocks are detachably connected to the upper chord of the steel grid.

[0010] Furthermore, a PVC sleeve is provided between the round steel rod and the reserved construction hole of the structural beam, the PVC sleeve is inserted into the reserved construction hole of the structural beam, and the round steel rod is inserted into the PVC sleeve.

[0011] Furthermore, the U-shaped square steel adopts a telescopic structure, including an outer U-shaped square steel and an inner U-shaped square steel of one specification difference, the notches of the outer U-shaped square steel and the inner U-shaped square steel are both set downward, and the inner U-shaped square steel is slidably inserted into the outer U-shaped square steel.

[0012] Furthermore, side plates extending inward are arranged on both sides of the notch of the outer U-shaped square steel, and the side plates on both sides are respectively clamped on both sides of the notch of the inner U-shaped square steel.

[0013] Furthermore, positioning holes are provided on both sides of the top plate of the outer U-shaped square steel, and elastic protrusions are provided on both sides of the top plate of the inner U-shaped square steel, and the elastic protrusions are clamped in the corresponding positioning holes.

[0014] The system of the present invention has a scientific design, ingenious structure, simple construction and convenient use. By using the system of the present invention, the construction progress is effectively improved. The construction of the operation department avoids the rental of large-scale steel pipes, reduces construction costs, reduces safety hazards at the construction site, and achieves good social benefits. The system of the present invention solves the problems of long erection time, high erection height, and high rental costs of steel pipe fasteners in the construction process of large-span and ultra-high roofs, greatly reduces the difficulty of construction, shortens the construction period of erection and dismantling, speeds up the progress of engineering construction, and ensures the safety of construction site operations. The system can be used in a turnover manner, effectively shortens the construction period, and has obvious economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings herein are used to provide further explanation of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0016] Figure 1 It is a schematic diagram of the overall structure of the system of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection between the protection part and the structural beam in the system of the present invention.

[0018] Figure 3 Schematic diagram of the U-shaped square steel structure in the system of the present invention (contracted state).

[0019] Figure 4 Schematic diagram of the U-shaped square steel structure in the system of the present invention (extended state).

[0020] Figure 5 for Figure 3 AA section view in.

[0021] In the figure: 1-working part, 2-protection part, 3-structural beam, 4-working platform, 5-sling, 6-U-shaped square steel, 7-upper chord, 8-lower chord, 9-damper, 10-limit block, 11-outer U-shaped square steel, 12-inner U-shaped square steel, 13-side plate, 14-elastic protrusion, 15-embedded parts, 16-guide rail, 17-hook, 18-safety flat net, 19-fastening nut, 20-closed round hoop, 21-reserved construction hole, 22-PVC casing. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art better understand the present invention, the present invention is further clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the features in the embodiments and examples of this application can be combined with each other.

[0023] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "top", "bottom", "upper", "lower", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example 1

[0025] like Figures 1 to 5 As shown, this embodiment provides a three-dimensional crawling high-altitude construction system for a large-span steel grid lighting roof, including an operating part 1 and a protective part 2, the operating part 1 is installed on the steel grid, and the protective part 2 is installed between the structural beams 3 below the steel grid.

[0026] The working part 1 includes a working platform 4, a sling 5 and a U-shaped square steel 6; both ends of the working platform 4 are fixedly connected to the sling 5, the top end of the sling 5 is suspended on the upper chord 7 of the steel grid, and the rope end of the sling 5 is locked and fixed by a lock; the notch of the U-shaped square steel 6 faces downward and is clamped on the lower chord 8 of the steel grid, and a steel wire rope is wound between the U-shaped square steel 6 and the lower chord 8 of the steel grid, and the rope end of the steel wire rope is locked and fixed by a lock; the bottom end of the working platform 4 is supported on the U-shaped square steel 6, and the working platform 4 and the U-shaped square steel 6 are detachably connected by bolts. During specific implementation, the working platform 4 includes a main beam, a secondary beam, a scaffolding board and a guardrail. The main beam and the secondary beam are vertically arranged and welded into an integral frame. The scaffolding board is laid on the integral frame. The guardrail is arranged around the integral frame and is fixedly connected to the integral frame. A lifting ring for connecting a sling 5 and a hook for lifting the working platform 4 are welded and fixed to the periphery of the integral frame. Dampers 9 are installed at both ends of the integral frame. The dampers 9 can be specifically fixed to the two end ends of the main beam to prevent the working platform from moving during work. The bottom end of the sling 5 is fixedly connected to the lifting ring of the overall frame, and two lock buckles are arranged at the top rope head of the sling 5, and the length of the last lock buckle from the rope head is not less than 100mm; limit blocks 10 are arranged on both sides of the connection between the sling 5 and the upper chord rod 7 of the steel grid, and the limit blocks 10 are detachably connected to the upper chord rod 7 of the steel grid. When the top end of the sling 5 is hung on the upper chord rod 7 of the steel grid, the limit blocks 10 are fixed on both sides of the hanging point, and the limit blocks 10 on both sides can position and fix the hanging point of the sling 5 to prevent the sling 5 from sliding on the upper chord rod 7; the specific structure of the limit block 10 is not limited, as long as it can be fixed on the upper chord rod 7 to block the hanging point of the sling 5, and the connection method of the limit block 10 and the upper chord rod 7 can be clamping fixation, bolt fixing, etc. The U-shaped square steel 6 adopts a telescopic structure, such as Figures 3 to 5As shown, it includes an outer U-shaped square steel 11 and an inner U-shaped square steel 12 with a difference of one specification. The notches of the outer U-shaped square steel 11 and the inner U-shaped square steel 12 are both set downward, and the inner U-shaped square steel 12 is slidably inserted in the outer U-shaped square steel 11; side plates 13 extending inward are arranged on both sides of the notch of the outer U-shaped square steel 11, and the side plates 13 on both sides are respectively clamped on both sides of the notch of the inner U-shaped square steel 12. Such a design ensures that the outer U-shaped square steel 11 and the inner U-shaped square steel 12 can be fitted together without being separated from each other; positioning holes are opened on both sides of the top plate of the outer U-shaped square steel 11, and elastic protrusions 14 are arranged on both sides of the top plate of the inner U-shaped square steel 12. The elastic protrusions 14 are clamped in the corresponding positioning holes, and the elastic protrusions 14 are clamped in the corresponding positioning holes. The specific configuration of the protrusion 14 is as follows: a card slot is opened on the top plate of the inner U-shaped square steel 12, the elastic protrusion 14 is placed in the card slot, and a spring is connected between the bottom end of the elastic protrusion 14 and the bottom of the card slot; this design allows the outer U-shaped square steel 11 and the inner U-shaped square steel 12 to be relatively fixed in position when they are not stretched. When the outer U-shaped square steel 11 and the inner U-shaped square steel 12 want to stretch, the elastic protrusion 14 is pressed to withdraw it from the positioning card hole. At this time, the inner U-shaped square steel 12 can be pulled out of the outer U-shaped square steel 11. When the elongation reaches the maximum, the elastic protrusion 14 at the joint between the two is re-stuck in the positioning card hole under the action of the spring elastic force, and the two are relatively fixed.

[0027] The protection part 2 includes an embedded part 15, a guide rail 16, a hook 17 and a safety net 18; the embedded part 15 is a round steel rod, one end of the round steel rod is formed with a closed hoop 20, and the other end is provided with a threaded section, the round steel rod is inserted into the reserved construction hole 21 on the structural beam 3, the closed hoop 20 at one end thereof abuts against the side wall of the structural beam 3, and the threaded section at the other end thereof is threadedly connected with a fastening nut 19; the guide rail 16 is installed between the embedded parts 15, and the two end portions of the guide rail 16 are respectively fixedly connected to the closed hoop 20 of the embedded part 15, and the fixed connection between the end portions of the guide rail 16 and the closed hoop 20 can be achieved by fixed card connection, bolt connection, wire rope connection, welding and the like; a plurality of hooks 17 are provided, and all are slidably connected to the guide rail 16; the safety net 18 is installed between the structural beams 3, and the two sides of the safety net 18 are respectively fixedly connected to the hooks 17 on the corresponding side guide rails 16. During specific implementation, a PVC sleeve 22 is arranged between the round steel rod and the reserved construction hole 21 of the structural beam 3. The PVC sleeve 22 is inserted into the reserved construction hole 21 of the structural beam 3, and the round steel rod is inserted into the PVC sleeve 22. The setting of the PVC sleeve 22 can play a good protective role in the reserved construction hole 21, preventing the round steel rod from causing damage to the reserved construction hole 21 during installation or stress, thereby protecting the integrity of the structural beam 3 and ensuring that the safety performance of the building is not affected. Example 2

[0028] The present embodiment provides a construction method for constructing a large-span steel grid skylight roof using the system described in Example 1, and the construction method mainly includes: demolding and cleaning the structural beam 3 → steel grid construction → production of the working part 1 in the system described in Example 1 → installation of the protective part 2 in the system described in Example 1 → installation of the working part 1 in the system described in Example 1 → construction of the skylight roof → moving the system described in Example 1 to the next span to continue construction → dismantling the system described in Example 1.

[0029] 1) Demoulding and cleaning of structural beam 3 For the structural beam 3 with a large span and a large cross-sectional size, the formwork is removed when the concrete strength reaches 100% of the design requirement; after the formwork is removed, the floating slurry and loose parts on the surface are cleaned to ensure that the main structure is stressed during the erection of the system described in Example 1.

[0030] 2) Steel grid construction Preparation of the lower chord rod 8 and the lower chord ball: Each installation ball is numbered, and the bottom chord ball and the lower chord rod 8 after connection are determined according to the fixed number of bottom balls. Before connection, the geometric dimensions are remeasured with a steel ruler to ensure that they can be assembled into a grid shape.

[0031] Installation of the lower chord rod 8 and the lower chord ball: Before construction, each installation ball is assigned a number. During the construction process, the lower chord ball can be fixed according to the number to determine the center, and then the lower chord ball is connected to the lower chord rod 8. The measurement method is diagonal size measurement, and the other end should be used as a reference. Spot welding can only be performed after confirmation.

[0032] Installation of the web bar: The positions of the upper chord bar 7 and the lower chord bar 8 must be scientifically corrected before the steel grid is installed, and then welding can be performed. Use high-strength bolts to connect the web bar and the upper chord ball of the grid, and then set it as a downward tetrahedral system. At the same time, use spot welding to connect the lower part of the web bar with the lower chord ball to ensure that the installation of the upper chord bar 7 can be completed smoothly.

[0033] Assembly of the top chord: The four upper chord rods 7 in the upward tetrahedral pyramid system are installed from the inside to the outside. When arranging the rods, pay attention to the reference to the vertebral body of the ventral rod. The high-strength bolts should be tightened in sequence. The ventral rod should be checked and tightened to avoid loose rods causing unsafe conditions. The installation method of each frame is the same. After one frame is installed, the second frame will be installed until the installation is completed.

[0034] During the installation of the grid, the tightness of the bolts, welding quality, deflection during installation, and axis deviation of the support points should be checked at any time, and any problems found should be solved in time. After the steel grid is installed, the skylight roof can be installed.

[0035] 3) Production of the operating unit 1 in the system described in Example 1 The structure and composition of the system have been described in detail in Example 1, and the various parts of the system are prepared and manufactured according to the description. For example, the main beam and the secondary beam are made of No. 16 U-shaped channel steel, the lifting rings and hooks thereon are made of Φ16mm steel bars (Q235), the sling 5 is made of Φ20 steel wire rope, etc. Similarly, other parts can be manufactured according to their own conditions.

[0036] 4) Installation of the protection part 2 in the system described in Example 1 The structure and composition of the protection part 2 have been described in detail in the first embodiment, and each structure can be prepared and installed according to the description.

[0037] 5) Installation of the operating unit 1 in the system described in Example 1 The structure and composition of the working part 1 have been described in detail in Example 1, and each structure can be prepared and installed according to the description. During the installation process, the U-shaped square steel 6 is first installed on the lower chord 8 of the steel grid through a steel wire rope and a lock, and then the working platform 4 is supported on the U-shaped square steel 6 and the two are connected and fixed by bolts, so that the working platform 4 and the U-shaped square steel 6 are finally locked on the lower chord 8 of the steel grid; after the working platform 4 is locked, the sling 5 can be installed, and the sling 5 is suspended on the upper chord 7, wherein the length of the sling 5 is continuously adjusted with the slope of the steel grid to ensure that the stress state of the slings 5 ​​on both sides is consistent, and after the adjustment is completed, the rope head of the sling 5 is locked with a lock, and at the same time, limit blocks 10 are installed on both sides of the hanging point of the sling 5 to prevent the sling 5 from moving.

[0038] 6) Construction of lighting roof During the construction of the skylight roof, the workers stand on the working platform 4 to carry out the construction. Before the people on the working platform 4 operate, they should check whether the limit block 10 and the damper 9 are set correctly to prevent the shaking of the working platform 4 during the construction process. After the working platform 4 is inspected and qualified, the steel keel welding, anti-corrosion and fire-proof spraying, skylight roof glass (aluminum plate) installation, sealing and gluing and other construction processes of the skylight roof are carried out.

[0039] 7) Dismantling of the system described in Example 1 When dismantling the system, first remove the sling 5 from the upper chord 7, then remove the connection between the working platform 4, the U-shaped square steel 6 and the lower chord 8, and then remove the whole system on the ground; then remove the safety flat net 18, the guide rail 16, the hook 17, the embedded parts 15, etc. of the protective part 2. During the dismantling process, personnel shall not be replaced. If personnel must be replaced, the dismantling situation shall be explained clearly. The dismantling process shall not be interrupted. If interruption is necessary, the dismantling part shall be handled and concluded, and it shall be checked whether it will collapse. It can be stopped only after safety is confirmed.

[0040] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions. The sentence "includes an element defined by ..." does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0041] The above-mentioned embodiments only express the best implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A three-dimensional crawling high-altitude construction system for a large-span steel grid lighting roof, characterized by: It includes an operating part and a protective part. The operating part is installed on the steel grid, and the protective part is installed between the structural beams below the steel grid; The working part includes a working platform, a sling and a U-shaped square steel. Both ends of the working platform are fixedly connected to the sling. The top of the sling is suspended on the upper chord of the steel grid, and the rope head of the sling is locked and fixed by a lock. The notch of the U-shaped square steel faces downward and is clamped on the lower chord of the steel grid. A steel wire rope is wound between the U-shaped square steel and the lower chord of the steel grid, and the rope head of the steel wire rope is locked and fixed by a lock. The bottom end of the working platform is supported on the U-shaped square steel, and the working platform and the U-shaped square steel are detachably connected by bolts. The protection part includes embedded parts, guide rails, hooks and safety nets. The embedded parts are round steel rods. One end of the round steel rods is formed with a closed circular hoop and the other end is provided with a threaded section. The round steel rods are inserted into the reserved construction holes on the structural beams. The closed circular hoop at one end abuts against the side wall of the structural beam, and the threaded section at the other end is threaded with a fastening nut; the guide rails are installed between the embedded parts, and the two end portions of the guide rails are respectively fixedly connected to the closed circular hoop of the embedded parts; there are multiple hooks, and they are all slidably connected to the guide rails; the safety net is installed between the structural beams, and the two sides of the safety net are respectively fixedly connected to the hooks on the corresponding side guide rails.

2. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 1 is characterized by: The working platform includes a main beam, a secondary beam, a scaffolding board and a guardrail. The main beam and the secondary beam are vertically arranged and welded into an integral frame. The scaffolding board is laid on the integral frame. The guardrail is arranged around the integral frame and is fixedly connected to the integral frame. The outer periphery of the integral frame is welded and fixed with a lifting ring for connecting a sling and a hook for lifting the working platform.

3. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 2 is characterized by: Dampers are installed at both ends of the overall frame.

4. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 1 is characterized by: Two lock buckles are provided at the rope end of the sling, and the length of the last lock buckle from the rope end is not less than 100mm; limit blocks are provided on both sides of the connection between the sling and the upper chord of the steel grid, and the limit blocks are detachably connected to the upper chord of the steel grid.

5. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 1 is characterized by: A PVC sleeve is arranged between the round steel rod and the reserved construction hole of the structural beam. The PVC sleeve is inserted into the reserved construction hole of the structural beam, and the round steel rod is inserted into the PVC sleeve.

6. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 1 is characterized by: The U-shaped square steel adopts a telescopic structure, including an outer U-shaped square steel and an inner U-shaped square steel of one specification difference, the notches of the outer U-shaped square steel and the inner U-shaped square steel are both set downward, and the inner U-shaped square steel is slidably inserted into the outer U-shaped square steel.

7. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 6 is characterized by: Side plates extending inward are arranged on both sides of the notch of the outer U-shaped square steel, and the side plates on both sides are respectively clamped on both sides of the notch of the inner U-shaped square steel.

8. The three-dimensional crawling high-altitude construction system for large-span steel grid lighting roof according to claim 7 is characterized by: Positioning holes are provided on both sides of the top plate of the outer U-shaped square steel, and elastic protrusions are provided on both sides of the top plate of the inner U-shaped square steel, and the elastic protrusions are clamped in the corresponding positioning holes.

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