CN114856245B - Grid dismantling method - Google Patents
Grid dismantling method Download PDFInfo
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- CN114856245B CN114856245B CN202210564626.XA CN202210564626A CN114856245B CN 114856245 B CN114856245 B CN 114856245B CN 202210564626 A CN202210564626 A CN 202210564626A CN 114856245 B CN114856245 B CN 114856245B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000004088 simulation Methods 0.000 claims description 20
- 230000008859 change Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 7
- 238000010276 construction Methods 0.000 abstract description 8
- 230000002829 reductive effect Effects 0.000 abstract description 6
- 230000002441 reversible effect Effects 0.000 abstract description 5
- 238000005422 blasting Methods 0.000 abstract description 3
- 239000002360 explosive Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Mechanical Engineering (AREA)
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- Electromagnetism (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a grid dismantling method. The net rack comprises a rod piece group and a plurality of stand columns, wherein the rod piece group comprises a first rod piece group and a second rod piece group, the first rod piece group is connected with the second rod piece group, each stand column is connected with the second rod piece group, and the net rack dismantling method comprises the following steps: identifying a plurality of key rod piece groups in the rod piece groups, wherein each key rod piece group corresponds to each upright one by one; and removing all the key rods in each key rod group so as to collapse the net rack. Compared with the traditional blasting demolition method and reverse demolition method, the grid demolition method has the advantages that the demolition period is shorter, only the key rod piece groups of the grid are needed to be determined in advance, the corresponding key rod piece groups are demolished in construction, main supporting points of the grid are damaged, the grid can be quickly collapsed, the grid demolition purpose is achieved, and when the key rod piece groups are demolished, an additional supporting device is not needed, so that the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of grid frame dismantling, in particular to a grid frame dismantling method.
Background
In the prior art, the removal of the grid typically uses a blast removal method and a reverse removal method. The explosive dismantling method needs to use the explosive, and the explosive needs to be used in a certain approval process, so that the construction period is prolonged, the use noise of the explosive is high, the uncontrollability is high, and certain potential safety hazards exist. The reverse dismantling method needs to be assisted by using the supporting device, so that the dismantling cost is high, all rods of the net rack are required to be reversely dismantled, workers need to work at high altitude for a long time, and the construction time is long. Therefore, in order to solve the above-mentioned problems, it is necessary to develop and improve a method for removing the net rack.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a grid dismantling method, which can collapse the grid by dismantling part of bars of the grid, thereby dismantling the grid.
According to a first aspect of the present invention, a rack removing method includes a rack set including a first rack set and a second rack set, the first rack set being connected to the second rack set, and a plurality of columns, each of the columns being connected to the second rack set, the rack removing method including the steps of:
Identifying a plurality of key rod piece groups in the rod piece groups, wherein each key rod piece group corresponds to each upright one by one;
and removing all key rods in each key rod group so as to collapse the net rack.
The grid dismantling method provided by the embodiment of the invention has at least the following beneficial effects: compared with the traditional blasting demolition method and reverse demolition method, the grid demolition method has the advantages that the demolition period is shorter, only the key rod piece groups of the grid are needed to be determined in advance, the corresponding key rod piece groups are demolished in construction, main supporting points of the grid are damaged, the grid can be quickly collapsed, the grid demolition purpose is achieved, and when the key rod piece groups are demolished, an additional supporting device is not needed, so that the construction cost is reduced.
According to some embodiments of the invention, the identifying further comprises the steps of: and (3) carrying out simulation analysis on the dismantling of the net rack by using finite element analysis software, and identifying the key rod piece group based on the stress change of other undetached rod pieces in the dismantling process.
According to some embodiments of the present invention, two adjacent columns are selected to be respectively set as a first column and a second column, and the rack removing method includes the following steps:
removing all bars of the key bar set corresponding to the first upright;
removing all rods of the key rod piece group corresponding to the second upright post, so that the part of the net rack corresponding to the first upright post and the second upright post is collapsed;
repeating the steps until the net rack is completely collapsed.
According to some embodiments of the invention, the rack comprises a right-angled pyramid rack, and the key bar set corresponding to the second upright comprises a first key bar, a second key bar, and a third key bar.
According to some embodiments of the invention, the identifying further comprises the steps of:
First round simulation analysis: on the basis of dismantling all the rod pieces of the key rod piece group corresponding to the first upright post, sequentially performing simulation analysis on stress changes of the undetached rod pieces connected with the second upright post in the second rod piece group after dismantling single rod pieces connected with the second upright post in the second rod piece group, and finding out the rod piece with the largest stress change of the undetached rod pieces connected with the second upright post in the second rod piece group after dismantling to serve as a first key rod piece;
Second round of simulation analysis: continuously and sequentially carrying out simulation analysis on the single rod connected with the second upright post in the second rod group on the basis of dismantling the first key rod, and finding out the rod with the largest stress change of the non-dismantled rod connected with the second upright post in the second rod group as a second key rod;
And repeating the simulation analysis flow until the net rack is partially collapsed, so that each key rod member included in the key rod member group corresponding to the second upright post is identified.
According to some embodiments of the invention, the net rack comprises a right-hand square pyramid net rack, the second rod member group comprises a plurality of web members, each upright is correspondingly connected with a plurality of web members, and each key rod member of the key rod member group corresponding to the upright is arranged as all web members correspondingly connected with the upright.
According to some embodiments of the present invention, the net rack includes a right-hand square pyramid net rack, the second rod group includes a plurality of web members, each of the columns is correspondingly connected with a plurality of the web members, each of the key rods of the key rod group corresponding to the columns is configured as all of the web members correspondingly connected with the columns, each of the columns includes a first column, a second column, and a third column, the first column is adjacent to the second column, the second column is adjacent to the third column, and the net rack removing method includes the steps of:
removing all the web members correspondingly connected with the first upright post;
at least one of the web members correspondingly connected with the second upright post is reserved, and the rest web members outside the reserved web members are removed;
removing all the web members correspondingly connected with the third upright post;
And removing the web member reserved at the second upright post.
According to some embodiments of the present invention, the net rack includes a right-hand square pyramid net rack, the second rod member set includes a plurality of web members, each of the columns is correspondingly connected with a plurality of the web members, the key rod member set corresponding to the column includes the web members correspondingly connected with each of the columns, each of the columns includes a first column, a second column, a third column, and a fourth column, and the first column, the second column, the third column, and the fourth column are sequentially arranged along four corners of a rectangle, the net rack removing method includes the steps of:
removing all the web members correspondingly connected with the first upright post;
at least one of the web members correspondingly connected with the second upright post is reserved, and the rest web members outside the reserved web members are removed;
removing all the web members correspondingly connected with the third upright post;
and removing all the web members correspondingly connected with the fourth upright post.
According to some embodiments of the invention, before removing the key set of bars, further comprising the steps of: and breaking the roof boards around the upright posts and the rod piece sets.
According to some embodiments of the invention, before removing the key set of bars, further comprising the steps of: and preparing a hoisting device so that workers hoist in the air to detach the key rod piece set.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a rack according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another view of FIG. 1;
FIG. 3 is a flow chart of a method of grid removal in accordance with an embodiment of the first aspect of the present invention;
FIG. 4 is a flowchart of an identification step according to an embodiment of the present invention;
FIG. 5 is a flowchart of a removal step of an embodiment of the present invention;
FIG. 6 is a flow chart of an identification step according to some embodiments of the invention;
FIG. 7 is a flowchart of a removal step according to another embodiment of the present invention;
fig. 8 is a flowchart of a removal step of a further embodiment of the present invention.
Reference numerals:
Net rack 100, upper chord 110, first set of rods 120, lower chord 130, web members 140, second set of rods 150, upright 160;
First column 200, second key bar 210, third key bar 220, first key bar 230, second column 240, third column 250, fourth column 260.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present invention, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The grid removal method according to the embodiment of the present invention is described below with reference to the drawings.
Referring to fig. 1 and 3, according to the rack removing method of the first aspect of the present invention, a rack 100 includes a first pole set 120 and a second pole set 150, the first pole set 120 is connected to the second pole set 150, and each pole 160 is connected to the second pole set 150, and a plurality of poles 160, the rack removing method includes the steps of:
s100, identifying a plurality of key rod piece groups in the rod piece groups, wherein each key rod piece group corresponds to each upright 160 one by one;
and S200, removing all the key rods in each key rod group to collapse the net rack 100.
Specifically, the upright 160 provides a main structural support for the grid 100, one end of the upright 160 is fixed on the ground, the other end of the upright 160 is connected with a part of the rods of the second rod set 150, the rods of the first rod set 120 support the roof, and the second rod set 150 is connected with the first rod set 120 to provide a supporting force for the first rod set 120.
Step S100 first identifies a set of bars, and screens out key sets of bars. Since the support of the rod assemblies depends on the columns 160, the rods of the key rod assemblies are rods connected to the columns 160, and thus, each column 160 is correspondingly provided with a key rod assembly. The method for identifying the key rod piece group can be selected to be analyzed through simulation software or can be selected to be mechanically analyzed through a mathematical method.
Step S200 removes the rods of the identified key rod group, and damages the main supporting points of the net rack 100, so that the net rack 100 collapses under stress shock, and when all the key rods of the key rod group are removed, the whole collapse removal of the net rack 100 can be realized.
Compared with the traditional blasting demolition method and the reverse demolition method, the grid demolition method of the embodiment of the invention has the advantages that the demolition period is shorter, the grid 100 can be quickly collapsed by demolishing the corresponding key bar sets in construction only by determining the key bar sets of the grid 100 in advance, the purpose of demolishing the grid 100 is achieved, and in addition, an additional supporting device is not needed when the key bar sets are demolished, so that the construction cost is reduced.
Referring to fig. 4, according to some embodiments of the invention, the identifying further comprises the steps of: s110, performing simulation analysis on the dismantling of the net rack 100 by using finite element analysis software, and identifying a key rod piece set based on stress changes of other undetached rod pieces in the dismantling process.
Specifically, after one rod is removed, the stress of the other rods will change accordingly. When the stress of other bars changes greatly, the removed bar is indicated as a bar providing a larger supporting force, and is marked as a key bar of the key bar group. The process of dismantling the rods and comparing the stress change of other rods is repeated until the net rack 100 collapses after a certain number of rods are dismantled, and the dismantled rods are the key rods in the key rod group.
Referring to fig. 2 and 5, according to some embodiments of the present invention, two adjacent columns 160 are selected to be respectively provided as a first column 200 and a second column 240, and the rack removing method includes the steps of:
S210, removing all rods of the key rod piece group corresponding to the first upright 200;
s220, removing all rods of the key rod piece group corresponding to the second upright 240, so that the parts of the net rack 100 corresponding to the first upright 200 and the second upright 240 collapse;
S230, repeating the steps until the net rack 100 is completely collapsed.
Specifically, in step S210, after all the rods of the rod assembly of the first upright 200 are removed, the rod assembly of the first upright 200 still does not meet the collapse requirement although the stress changes due to the involvement of the rods on the second upright 240. After all the rods of the key rod group corresponding to the second upright 240 are removed in step S220, the pulling force of the rods on the second upright 240 on the rods at the first upright 200 is reduced, the rod group corresponding to the first upright 200 begins to collapse due to the stress shock, and simultaneously the rod group corresponding to the second upright 240 synchronously collapses due to the pulling of the rod group corresponding to the first upright 200, thereby realizing the collapse of the portions of the net rack 100 corresponding to the first upright 200 and the second upright 240. Step S230 repeats the dismantling operation for the two adjacent columns 160, thereby achieving the purpose of completely collapsing the net rack 100.
Referring to fig. 2, according to some embodiments of the present invention, the net rack 100 includes a right-angled square pyramid net rack 100, and the key bar set corresponding to the second upright 240 includes a first key bar 230, a second key bar 210, and a third key bar 220.
Specifically, when the net rack 100 is the right-hand square pyramid net rack 100, after all the rods of the key rod group corresponding to the first upright 200 are removed, after the first key rod 230, the second key rod 210 and the third key rod 220 of the key rod group corresponding to the second upright 240 are continuously removed, the collapse of the portions of the net rack 100 corresponding to the first upright 200 and the second upright 240 can be achieved.
Referring to fig. 2 and 6, according to some embodiments of the invention, the identifying further comprises the steps of:
S111, first round simulation: on the basis of removing all the rods of the key rod group corresponding to the first upright 200, sequentially performing simulation analysis on the stress change of the undetached rod connected with the second upright 240 in the second rod group 150 after removing the single rod connected with the second upright 240 in the second rod group 150, and finding out the rod with the largest stress change of the undetached rod connected with the second upright 240 in the second rod group 150 after removing as the first key rod 230;
s112, second round simulation: after the first key rod 230 is removed, continuously and sequentially performing simulation analysis on the single rod connected with the second upright 240 in the second rod group 150, and then, finding out the stress change of the undetached rod connected with the second upright 240 in the second rod group 150, and taking the rod with the largest stress change of the undetached rod connected with the second upright 240 in the second rod group 150 as the second key rod 210;
S113, repeating the simulation analysis flow until the net rack 100 is partially collapsed, so as to identify each key rod member included in the key rod member group corresponding to the second upright 240.
Based on the above steps, step S111 identifies the bar providing the greatest supporting force among the bars connected to the second upright 240 as the first key bar 230. Step S112 identifies the lever providing the greatest supporting force as the second lever on the basis of removing the first key lever 230. Step S113 repeats the above simulation analysis steps until the nth round of simulation net rack 100 collapses, and at this time, the first key rod 230, the second key rod 210 … … and the nth key rod included in the key rod group corresponding to the second upright 240 are obtained. By applying the simulation method of the present embodiment, it can be obtained that when the rack 100 is a square pyramid rack 100, the key bars of the key bar set corresponding to the second upright 240 are the first key bar 230 set, the second key bar 210 and the third key bar 220.
Referring to fig. 1 and 2, according to some embodiments of the present invention, the net rack 100 includes a right-angled square pyramid net rack 100, the second bar set 150 includes a plurality of web members 140, each of the columns 160 is correspondingly connected to the plurality of web members 140, and each of the key bars of the key bar set corresponding to the columns 160 is configured as all web members 140 correspondingly connected to the columns 160.
Specifically, when the net rack 100 is a right-angled quadrangular pyramid net rack 100, after analysis by finite element simulation software, it can be known that when the plurality of web members 140 correspondingly connected to two adjacent upright posts 160 are all removed, the portions of the net rack 100 corresponding to the two adjacent upright posts 160 collapse. Accordingly, the web frame 100 can be collapsed and removed by removing all of the plurality of web members 140 connected to the respective columns 160.
The rod assembly of the square pyramid-shaped net rack 100 specifically further includes an upper chord 110 and a lower chord 130, and the web members 140 are more easily identified and distinguished with respect to the upper chord 110 and the lower chord 130, which helps to improve the efficiency of the dismantling process. And only when the web members 140 correspondingly connected to two adjacent upright posts 160 are removed, the web members can collapse, the time for collapse is easy to control, and potential safety hazards can be effectively reduced.
Referring to fig. 1,2 and 7, according to some embodiments of the present invention, the net rack 100 includes a right-hand square pyramid net rack 100, the second bar set 150 includes a plurality of web members 140, each of the columns 160 is correspondingly connected to the plurality of web members 140, each of the key bars of the key bar set corresponding to the columns 160 is configured as all web members 140 correspondingly connected to the columns 160, each of the columns 160 includes a first column 200, a second column 240 and a third column 250, the first column 200 is adjacent to the second column 240, the second column 240 is adjacent to the third column 250, and the net rack removing method includes the steps of:
S240, removing all web members 140 correspondingly connected with the first upright 200;
s245, reserving at least one of the web members 140 correspondingly connected with the second upright post 240, and removing the rest web members 140 outside the reserved web members 140;
S250, removing all web members 140 correspondingly connected with the third upright post 250;
And S255, removing the web members 140 remained at the second upright 240.
Specifically, based on the above steps, when the net rack 100 is the right-hand square pyramid net rack 100, the net rack 100 has not collapsed after removing all the web members 140 correspondingly connected to the first upright 200 in step S240. At step S245, at least one of the web members 140 correspondingly connected to the second upright 240 is reserved, and sufficient traction force is provided for the corresponding rod member at the first upright 200 by the reserved web member 140, so that after the partial web member 140 of the second upright 240 is removed, the net rack 100 still cannot collapse. After all web members 140 corresponding to third upright 250 are removed in step S250, because the pulling force of web members 140 retained at second upright 240 is still sufficient to keep the corresponding rods at third upright 250 stable, net rack 100 still cannot collapse. After the web member 140 retained at the second upright 240 is removed in step S255, the pulling force provided by the retained rod member disappears, the remaining rod member cannot be kept stable, the portion of the grid 100 corresponding to the first upright 200, the second upright 240 and the third upright 250 collapses, and the overall collapse of the grid 100 can be achieved by repeating the removing steps of this embodiment. By applying the dismantling step of the embodiment, the number of corresponding columns 160 during single collapse can be increased, and the number of times of collapse can be reduced.
Referring to fig. 1,2 and 8, according to some embodiments of the present invention, the net rack 100 includes a right-hand square pyramid net rack 100, the second bar set 150 includes a plurality of web members 140, each of the columns 160 is correspondingly connected to the plurality of web members 140, the key bar set corresponding to the columns 160 includes web members 140 correspondingly connected to each of the columns 160, each of the columns 160 includes a first column 200, a second column 240, a third column 250 and a fourth column 260, the first column 200, the second column 240, the third column 250 and the fourth column 260 are disposed along four corners of a rectangle, and the net rack removing method includes the steps of:
S260, removing all web members 140 correspondingly connected with the first upright 200;
s265, reserving at least one of the web members 140 correspondingly connected with the second upright post 240, and removing the rest web members 140 outside the reserved web members 140;
S270, removing all web members 140 correspondingly connected with the third upright 250;
And S275, removing all web members 140 correspondingly connected with the fourth upright 260.
Specifically, based on the above steps, when the net rack 100 is the right-hand square pyramid net rack 100, the net rack 100 has not collapsed after removing all the web members 140 correspondingly connected to the first upright 200 in step S260. At step S265, at least one of the web members 140 correspondingly connected to the second upright 240 is reserved, and sufficient traction force is provided for the corresponding rod member at the first upright 200 by the reserved web member 140, so that after the partial web member 140 of the second upright 240 is removed, the net rack 100 still cannot collapse. After removing all web members 140 corresponding to third upright 250 in step S270, rack 100 still does not collapse because the pulling force of web members 140 remaining at second upright 240 is still sufficient to keep the corresponding rods at third upright 250 stable. After removing all web members 140 corresponding to fourth column 260 in step S275, portions of net rack 100 corresponding to first column 200, third column 250, and fourth column 260 collapse due to removal of all web members 140 of fourth column 260 and adjacent first column 200, and removal of all web members 140 of fourth column 260 and adjacent third column 250. Because the collapse of the first upright 200, the third upright 250 and the fourth upright 260 can bring large deformation and pull to the whole net rack 100, and the pulling force of the web member 140 remained at the second upright 240 is smaller than the force brought by the large deformation and pull, the parts of the net rack 100 corresponding to the second upright 240 are synchronously collapsed under the action of the large deformation and pull, thereby realizing the synchronous collapse of the parts of the net rack 100 corresponding to the first upright 200, the second upright 240, the third upright 250 and the fourth upright 260.
Taking a specific right-angled quadrangular pyramid grid 100 as an example, the right-angled quadrangular pyramid grid 100 includes a first upright 200, a second upright 240, a third upright 250, and a fourth upright 260, where each upright 160 is connected to four diagonal web members 140 respectively. First, the four diagonal web members 140 of the first upright 200 are removed. Next, the three diagonal web members 140 of the second upright 240 are removed. Then, the four diagonal web members 140 of the third upright 250 are removed. Finally, the four diagonal web members 140 of the fourth upright 260 are removed, at this time, the first upright 200, the third upright 250 and the fourth upright 260 collapse first, the second upright 240 collapses under the action of the large deformation and pulling of the first upright 200, the third upright 250 and the fourth upright 260, and the collapse removal operation of the integral net rack 100 is realized by one-time collapse.
When the net rack 100 is provided with only four columns 160 of the first column 200, the second column 240, the third column 250 and the fourth column 260, the disposable collapse of the whole net rack 100 can be achieved by applying the dismantling method of the embodiment. When the grid 100 is provided with other columns 160 except the first column 200, the second column 240, the third column 250 and the fourth column 260, the dismantling method of the embodiment can also effectively reduce the number of times of collapse and increase the collapse area corresponding to one collapse.
According to some embodiments of the invention, before removing the key set of bars, further comprising the steps of: breaking the roof panels around the columns 160 and the sets of bars.
Specifically, before the grid 100 is dismantled, the roof board of the original building is often connected to the rod set, the roof board has a certain weight, and is easy to eject and splash after collapse, if the grid 100 collapses together with the roof board, a greater potential safety hazard exists, and the subsequent recovery of each rod of the rod set is not facilitated. Therefore, before the key rod piece set is removed, the upright posts 160 and roof plates around the rod piece set are broken, which is beneficial to the subsequent removal operation and improves the safety factor of the grid 100 removal.
According to some embodiments of the invention, before removing the key set of bars, further comprising the steps of: and preparing a hoisting device so that workers hoist in the air to dismantle the key rod piece set.
Specifically, the net rack 100 falls down along the gravity direction when collapsing, if the hydraulic shear car is used to dismantle the rod piece, the hydraulic shear car needs to be operated at a specific position, the hydraulic shear car is prevented from being pressed to have a certain space limitation, and when collapsing of the net rack 100 occurs, the shear arm of the hydraulic shear car is also easy to be smashed by the rod piece to cause damage if not being retracted in time. And because the rod piece that needs to be dismantled is in the air, the working field of the hydraulic shear car operator is also poor.
The workers are hoisted in the air through the hoisting device to carry out the dismantling operation of the key rod piece set, and the damage to the workers caused by the collapse of the net rack 100 can be avoided as long as the workers are positioned above the net rack 100. And the workers can detach the rod more flexibly, so that the key rod needing to be detached can be identified more easily, and the efficiency of the detaching step is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention. Furthermore, embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Claims (9)
1. The grid dismantling method is characterized in that the grid comprises a rod piece set and a plurality of upright posts, the rod piece set comprises a first rod piece set and a second rod piece set, one end of each upright post is used for being fixed on the ground, the other end of each upright post is connected with part of rod pieces of the second rod piece set, the rod pieces of the first rod piece set are used for supporting a roof, the second rod piece set is connected with the first rod piece set, the second rod piece set is used for providing supporting force for the first rod piece set, and the grid dismantling method comprises the following steps:
A plurality of key rod member groups are identified in the rod member groups, each key rod member group corresponds to each upright one by one, the rod members of the key rod member groups are rod members connected with the upright, and each upright is correspondingly provided with the key rod member group;
Removing all key rods in each key rod group so as to collapse the net rack;
the identifying further comprises the steps of: simulating and analyzing the dismantling of the net rack by utilizing finite element analysis software, and identifying the key rod piece group based on the stress change of other undetached rod pieces in the dismantling process; after one rod piece is removed, the stress of other rod pieces can be correspondingly changed; indicating that the removed rod is the rod providing the greater supporting force when the stress of the other rod is greatly changed, the removed rod being marked as the key rod of the key rod group; repeating the process of dismantling the rods and comparing the stress change of other rods until the net rack collapses after a certain number of rods are dismantled, wherein the dismantled rods are the key rods in the key rod group.
2. The grid removal method of claim 1, wherein two adjacent ones of the columns are selected to be a first column and a second column, respectively, the grid removal method comprising the steps of:
removing all bars of the key bar set corresponding to the first upright;
removing all rods of the key rod piece group corresponding to the second upright post, so that the part of the net rack corresponding to the first upright post and the second upright post is collapsed;
repeating the steps until the net rack is completely collapsed.
3. The rack removal method of claim 2, wherein the rack comprises a right-hand square pyramid rack, and the set of key bars corresponding to the second upright comprises a first key bar, a second key bar, and a third key bar.
4. A rack removal method as in claim 3, wherein said identifying further comprises the steps of:
First round simulation analysis: on the basis of dismantling all the rod pieces of the key rod piece group corresponding to the first upright post, sequentially performing simulation analysis on stress changes of the undetached rod pieces connected with the second upright post in the second rod piece group after dismantling single rod pieces connected with the second upright post in the second rod piece group, and finding out the rod piece with the largest stress change of the undetached rod pieces connected with the second upright post in the second rod piece group after dismantling to serve as a first key rod piece;
Second round of simulation analysis: continuously and sequentially carrying out simulation analysis on the single rod connected with the second upright post in the second rod group on the basis of dismantling the first key rod, and finding out the rod with the largest stress change of the non-dismantled rod connected with the second upright post in the second rod group as a second key rod;
And repeating the simulation analysis flow until the net rack is partially collapsed, so that each key rod member included in the key rod member group corresponding to the second upright post is identified.
5. The grid removal method of claim 1, wherein the grid comprises a right-hand square pyramid grid, the second set of rods comprises a plurality of web members, each of the columns is correspondingly connected with a plurality of web members, and each of the key rods of the set of key rods corresponding to the columns is configured as all of the web members correspondingly connected to the columns.
6. The grid removal method of claim 1, wherein the grid includes a right-hand square pyramid grid, the second set of rods includes a plurality of web members, each of the posts is correspondingly connected with a plurality of the web members, each of the key rods of the set of key rods corresponding to the posts is configured as all of the web members correspondingly connected with the posts, each of the posts includes a first post, a second post, and a third post, the first post is adjacent to the second post, the second post is adjacent to the third post, the grid removal method includes the steps of:
removing all the web members correspondingly connected with the first upright post;
at least one of the web members correspondingly connected with the second upright post is reserved, and the rest web members outside the reserved web members are removed;
removing all the web members correspondingly connected with the third upright post;
And removing the web member reserved at the second upright post.
7. The grid removal method according to claim 1, wherein the grid includes a right-hand square pyramid grid, the second bar set includes a plurality of web members, each of the columns is correspondingly connected with a plurality of the web members, the key bar set corresponding to the column includes the web members correspondingly connected to each of the columns, each of the columns includes a first column, a second column, a third column, and a fourth column, the first column, the second column, the third column, and the fourth column are sequentially disposed along four corners of a rectangle, the grid removal method includes the steps of:
removing all the web members correspondingly connected with the first upright post;
at least one of the web members correspondingly connected with the second upright post is reserved, and the rest web members outside the reserved web members are removed;
removing all the web members correspondingly connected with the third upright post;
and removing all the web members correspondingly connected with the fourth upright post.
8. The rack removal method of claim 1, further comprising the steps of, prior to removing the key set of bars: and breaking the roof boards around the upright posts and the rod piece sets.
9. The rack removal method of claim 1, further comprising the steps of, prior to removing the key set of bars: and preparing a hoisting device so that workers hoist in the air to detach the key rod piece set.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210564626.XA CN114856245B (en) | 2022-05-23 | 2022-05-23 | Grid dismantling method |
| PCT/CN2022/119718 WO2023226256A1 (en) | 2022-05-23 | 2022-09-19 | Grid frame demolition method |
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| CN202210564626.XA CN114856245B (en) | 2022-05-23 | 2022-05-23 | Grid dismantling method |
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| CN114856245B true CN114856245B (en) | 2024-05-28 |
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| CN114856245B (en) * | 2022-05-23 | 2024-05-28 | 中建钢构股份有限公司 | Grid dismantling method |
| CN117266627B (en) * | 2023-11-23 | 2024-02-23 | 北京市第三建筑工程有限公司 | Method for dismantling high-altitude large-span roof truss |
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| CN107391793B (en) * | 2017-06-15 | 2020-11-20 | 中国建筑一局(集团)有限公司 | Building structure dismantling method based on 3D scanning technology and MR mixed reality technology |
| CN111021779B (en) * | 2019-12-19 | 2023-03-31 | 中建钢构工程有限公司 | Integral descending and dismantling construction method for space net rack and auxiliary supporting mechanism |
| CN114856245B (en) * | 2022-05-23 | 2024-05-28 | 中建钢构股份有限公司 | Grid dismantling method |
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| CN112267709A (en) * | 2020-10-15 | 2021-01-26 | 中建科工集团有限公司 | Segmented demolition construction method for large-span beam string structure |
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| WO2023226256A1 (en) | 2023-11-30 |
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