Method for dismantling splicing attachment type roof net rack

Abstract

The invention discloses a splicing attachment type roof net rack dismantling method which comprises the steps that a supporting frame is connected to the periphery of each supporting stand column, and the top of each supporting frame extends to the position between an upper chord node and a lower chord node of a roof net rack; the top of each supporting frame is connected with a distribution beam, so that the two ends of each distribution beam extend out of the orthographic projection range of the corresponding supporting frame and respectively form an extension section; connecting a lifting appliance to the bottom of each extension section, and connecting the lifting appliance to a lower chord node of the roof net rack; dividing the roof net rack into a plurality of net rack units by taking the layout position of each support frame as a grid node; part of rod pieces, overlapped with orthographic projections of the supporting frames and the distribution beams on the periphery, on each net rack unit are removed; and the lifting tools on the multiple supporting frames on the periphery of each net rack unit are started, each net rack unit is lowered to the ground, and the construction efficiency is improved through the dismantling method.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a method for dismantling a splicable and attached roof grid. Background Art

[0002] With the continuous advancement of urban planning and transportation development, some old buildings or buildings that cannot meet modern needs need to be renovated or demolished. The grid structure includes multiple supporting columns and a grid roof connected to the top of the multiple supporting columns. As an important part of the building, the grid structure often needs to be demolished to adapt to new urban planning needs. Existing grid roofs are demolished with the help of heavy machinery such as tower cranes and truck cranes, but the existing grid roofs with large spans and high floor heights cannot be dismantled with traditional tower cranes, and the floor load of old buildings cannot meet the support of heavy machinery such as truck cranes. Moreover, whether it is a tower crane or a truck crane, the hoisting stability cannot be guaranteed when dismantling the grid roof, which poses a safety hazard to construction. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for dismantling a splicable attached roof grid frame. Relying on the existing supporting columns, the roof grid frame is divided into multiple grid units and then hoisted and lowered, avoiding the use of large equipment and making the hoisting more stable.

[0004] To achieve the above object, the technical solution adopted by the present invention is a method for dismantling a splicable attached roof grid, comprising the steps of:

[0005] Step 1: Connect a support frame to the periphery of each support column so that the top of each support frame extends to between the upper chord node and the lower chord node of the roof grid;

[0006] Step 2: Connect a distribution beam to the top of each support frame, so that both ends of each distribution beam extend outwards to a range corresponding to the orthographic projection of the support frame and form an extension section respectively;

[0007] Step 3: Connect a hanger at the bottom of each extension section, and connect the hanger to the lower chord node of the roof grid;

[0008] Step 4: Taking the layout position of each support frame as a grid node, dividing the roof grid into a plurality of grid units;

[0009] Step 5: removing the parts of the rods on each grid unit that overlap with the orthographic projections of the surrounding support frames and the distribution beam;

[0010] Step 6: disconnecting each of the grid units from the corresponding plurality of support columns;

[0011] Step 7: Start the hangers on the multiple support frames around each of the grid units to lower each of the grid units to the ground.

[0012] A further improvement of the method for dismantling a splicable and attached roof truss of the present invention is that the hoist is a winch, and the winch rope of the winch is connected to the lower chord node of the roof truss. Before executing the above step 5 and after executing the above step 4, all the winches are started to pull each of the truss units upward so that each of the winch ropes is in a taut state.

[0013] A further improvement of the method for dismantling the splicable and attached roof grid frame of the present invention is that the support frame comprises:

[0014] A plurality of vertical rods, wherein the plurality of vertical rods are arranged around the outer periphery of the supporting columns, the bottom of the vertical rods is connected to the ground, and the top of the vertical rods extends to between the upper chord node and the lower chord node of the roof grid;

[0015] A plurality of connecting rods are provided, and a plurality of connecting rods are spaced apart and connected between each of the vertical rods and the supporting columns.

[0016] A further improvement of the method for dismantling a splicable attached roof truss of the present invention is that the support frame also includes a plurality of hoops, which are arranged at intervals along the height direction of the support column and are detachably connected to the support column, and the connecting rod is connected between the vertical rod and the hoops.

[0017] A further improvement of the method for dismantling the splicable attached roof truss of the present invention is that the support frame also includes two diagonal braces for supporting the two extension sections, one end of the two diagonal braces is connected to the bottom of the corresponding extension section, and the other end is connected to the corresponding vertical rod.

[0018] A further improvement of the method for dismantling a splicable and attached roof truss of the present invention is that the hanger is detachably connected to the extension section, a sliding sleeve is connected to the top of the hanger, the sliding sleeve is slidably mounted on the extension section, and an anti-dropping member for preventing the sliding sleeve from falling off is connected to the extension section.

[0019] A further improvement of the method for dismantling a splicable and attached roof grid frame of the present invention is that the anti-slip component is a baffle, which is located on the relatively outer side of the sliding sleeve and is detachably connected to the top of the extension section.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] Relying on the existing supporting columns, the roof grid is divided into multiple grid units and then hoisted and lowered, avoiding the use of large equipment and making the hoisting more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a schematic diagram of step 5 of the method for dismantling the splicable attached roof grid frame of the present invention.

[0024] Figure 2 It is a schematic diagram of step 6 of the method for dismantling the splicable attached roof grid frame of the present invention.

[0025] Figure 3 The present invention is a front view of the connection between the support frame and the side column of the method for dismantling the splicable attached roof grid.

[0026] Figure 4 The present invention is a top view of the connection between the support frame and the side column of the method for dismantling the splicable attached roof grid frame.

[0027] Figure 5 The present invention is a front view of the connection between the support frame and the center column of the method for dismantling the splicable attached roof grid.

[0028] Figure 6 It is a top view of the connection between the support frame and the center column of the method for dismantling the splicable and attached roof grid frame of the present invention.

[0029] In the figure: 1, side column; 2, middle column; 3, conversion beam; 4, grid unit; 5, support frame; 501, vertical rod; 502, connecting rod; 503, distribution beam; 504, hanging device; 505, sliding sleeve; 506, anti-slip part; 507, diagonal brace; 508, clamp; 509, cross bar. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0031] The method for dismantling the splicable and attached roof grid frame of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] See also Figure 1 to Figure 6 As shown, the method for dismantling the splicable attached roof grid comprises the following steps:

[0033] Step 1: Connect the support frame 5 to the periphery of each support column so that the top of each support frame 5 extends to between the upper chord node and the lower chord node of the roof grid;

[0034] Step 2: Connect the distribution beam 503 to the top of each support frame 5, so that both ends of each distribution beam 503 extend outwards to a range corresponding to the orthographic projection of the support frame 5 and form an extension section respectively;

[0035] Step 3: Connect a hanger 504 at the bottom of each extension section, and connect the hanger 504 to the lower chord node of the roof grid;

[0036] Step 4: Taking the layout position of each support frame 5 as a grid node, the roof grid is divided into a plurality of grid units 4;

[0037] Step 5: Remove the parts of the rods on each grid unit 4 that overlap with the orthographic projections of the surrounding support frames 5 and the distribution beam 503;

[0038] Step 6: disconnecting each of the grid units 4 from the corresponding plurality of support columns;

[0039] Step 7: Start the hangers 504 on the multiple support frames 5 around each grid unit 4 to lower each grid unit 4 to the ground.

[0040] Specifically, when executing the above step 6, the hangers 504 around each grid unit 4 are controlled to descend synchronously.

[0041] Specifically, a transfer beam 3 for connecting the vertical rod 501 is connected to the ground.

[0042] By providing the conversion beam 3, a connection foundation is provided for the vertical rod 501, avoiding the vertical rod 501 being directly connected to the ground, and facilitating installation and disassembly.

[0043] Specifically, the plurality of supporting columns are distributed in a matrix, and the plurality of supporting columns include a plurality of side columns 1 located on the outside and a plurality of other middle columns 2 .

[0044] As attached Figures 3-4 As shown: when the support frame 5 is connected to the side column 1, it is only necessary to set the vertical rod 501 on one side of the side column 1;

[0045] As attached Figures 5-6 As shown: when the support frame 5 is connected to the middle column 2 , at least four vertical rods 501 are arranged on the periphery of the middle column 2 to surround the middle column 2 .

[0046] Specifically, the plurality of support frames 5 are distributed in a matrix, so each of the grid units 4 is rectangular, and the support frames 5 are provided at the four corners of each of the grid units 4. When executing the above step 5, some of the rods on each of the grid units 4 that overlap with the four support frames 5 at the corresponding four corners and the positive projection of the distribution beam 503 are removed.

[0047] Preferably, the hoist 504 is a winch, and the winch rope of the winch is connected to the lower chord node of the roof truss. Before executing the above step 5 and after executing the above step 4, all the winches are started to pull up each of the truss units 4 so that each of the winch ropes is in a taut state.

[0048] After the connection between the grid unit 4 and the corresponding multiple supporting columns is disconnected, the grid unit 4 loses its supporting force. Therefore, by pulling the winch upward, an upward pulling force is provided to each grid unit 4, and the grid unit 4 is suspended in the air instead of falling suddenly, thereby improving the lifting stability.

[0049] Preferably, the support frame 5 comprises:

[0050] A plurality of vertical rods 501, wherein the plurality of vertical rods 501 are arranged around the outer periphery of the supporting column, the bottom of the vertical rod 501 is connected to the ground, and the top of the vertical rod 501 extends to between the upper chord node and the lower chord node of the roof grid;

[0051] A plurality of connecting rods 502 are provided, and a plurality of connecting rods 502 are connected at intervals between each of the vertical rods 501 and the supporting column.

[0052] Specifically, the support frame 5 further includes a cross bar 509 , which is connected between adjacent vertical bars 501 by bolts, so as to surround a plurality of vertical bars 501 to form a whole.

[0053] By providing the cross bar 509 , the stability of the support frame 5 is improved.

[0054] Preferably, the support frame 5 further includes a plurality of hoops 508 , which are spaced apart along the height direction of the support column and detachably connected to the support column, and the connecting rod 502 is connected between the vertical rod 501 and the hoops 508 .

[0055] Specifically, both ends of the connecting rod 502 are connected to the vertical rod 501 and the clamp 508 by bolts.

[0056] Since the supporting column is a concrete structure, the clamp 508 is provided to provide a connection foundation for the connecting rod 502, thereby avoiding direct connection between the connecting rod 502 and the supporting column, improving the connection stability, and facilitating installation and disassembly.

[0057] Preferably, the support frame 5 further comprises two diagonal braces 507 for supporting the two extension sections, one end of the two diagonal braces 507 are connected to the bottom of the corresponding extension section, and the other end of the two diagonal braces 507 are connected to the corresponding vertical rod 501 .

[0058] When the sling 504 is used to lower the grid unit 4, the gravity load of the grid unit 4 is entirely borne by the extension section, and the stability of the extension section is improved by providing the diagonal brace 507 .

[0059] Preferably, the sling 504 is detachably connected to the extension section, a sliding sleeve 505 is connected to the top of the sling 504, the sliding sleeve 505 is slidably mounted on the extension section, and an anti-dropping member 506 is connected to the extension section for preventing the sliding sleeve 505 from falling off.

[0060] The sliding sleeve 505 is arranged to be detachable, so that the installation and turnover are facilitated.

[0061] Preferably, the anti-dropping member 506 is a baffle, which is located at the relatively outer side of the sliding sleeve 505 and is detachably connected to the top of the extension section.

[0062] Specifically, the baffle and the extension section are connected via bolts.

[0063] By providing the baffle, the sliding path of the sliding sleeve 505 is blocked to prevent the sliding sleeve 505 from slipping off the extension section when the grid unit 4 is subjected to uneven force, thereby improving the structural stability.

[0064] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0065] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A method for dismantling a splicable and attached roof grid, characterized in that: Includes steps: Step 1: Connect a support frame to the periphery of each support column so that the top of each support frame extends to between the upper chord node and the lower chord node of the roof grid; Step 2: Connect a distribution beam to the top of each support frame, so that both ends of each distribution beam extend outwards to a range corresponding to the orthographic projection of the support frame and form an extension section respectively; Step 3: Connect a hanger at the bottom of each extension section, and connect the hanger to the lower chord node of the roof grid; Step 4: Taking the layout position of each support frame as a grid node, dividing the roof grid into a plurality of grid units; Step 5: removing the parts of the rods on each grid unit that overlap with the orthographic projections of the surrounding support frames and the distribution beam; Step 6: disconnecting each of the grid units from the corresponding plurality of support columns; Step 7: Start the hangers on the multiple support frames around each of the grid units to lower each of the grid units to the ground.

2. The method for dismantling a splicable and attached roof grid as claimed in claim 1, characterized in that: The hoist is a winch, and the winch rope of the winch is connected to the lower chord node of the roof truss. Before executing the above step 5 and after executing the above step 4, all the winches are started to pull each of the truss units upward so that each of the winch ropes is in a taut state.

3. The method for dismantling a splicable and attached roof grid as claimed in claim 1, characterized in that: The support frame comprises: A plurality of vertical rods, wherein the plurality of vertical rods are arranged around the outer periphery of the supporting columns, the bottom of the vertical rods is connected to the ground, and the top of the vertical rods extends to between the upper chord node and the lower chord node of the roof grid; A plurality of connecting rods are provided, and a plurality of connecting rods are spaced apart and connected between each of the vertical rods and the supporting columns.

4. The method for dismantling a splicable and attached roof grid as claimed in claim 3, characterized in that: The support frame further comprises a plurality of hoops, which are arranged at intervals along the height direction of the support column and are detachably connected to the support column, and the connecting rod is connected between the vertical rod and the hoops.

5. The method for dismantling a splicable and attached roof grid as claimed in claim 3, characterized in that: The support frame also includes two oblique braces for supporting the two extension sections, one end of the two oblique braces is connected to the bottom of the corresponding extension section, and the other end of the two oblique braces is connected to the corresponding vertical rod.

6. The method for dismantling a splicable and attached roof grid as claimed in claim 1, characterized in that: The sling is detachably connected to the extension section, a sliding sleeve is connected to the top of the sling, the sliding sleeve is slidably mounted on the extension section, and an anti-dropping member for preventing the sliding sleeve from falling off is connected to the extension section.

7. The method for dismantling a splicable and attached roof grid as claimed in claim 6, characterized in that: The anti-dropping member is a baffle, which is located at the relatively outer side of the sliding sleeve and is detachably connected to the top of the extension section.

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