CN209837765U - Reversal dismantling temporary support conversion device for reinforced concrete structure - Google Patents
Reversal dismantling temporary support conversion device for reinforced concrete structure Download PDFInfo
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- CN209837765U CN209837765U CN201920424016.3U CN201920424016U CN209837765U CN 209837765 U CN209837765 U CN 209837765U CN 201920424016 U CN201920424016 U CN 201920424016U CN 209837765 U CN209837765 U CN 209837765U
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- shaped steel
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 32
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 238000005452 bending Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005520 cutting process Methods 0.000 description 21
- 238000010276 construction Methods 0.000 description 11
- 238000005422 blasting Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Abstract
The temporary support conversion device for reverse demolition of the reinforced concrete structure belongs to the technical field of reverse demolition devices of buildings and comprises a jack, a bearing plate, a short column connecting piece, a short supporting column and L-shaped steel. The utility model discloses interim bearing structure is constituteed to well jack, bearing board, supporting column and L shaped steel, and a pair of interim bearing structure arranges in the both sides of structure post, replaces the vertical bearing capacity of structure post transmission, and the bearing capacity of make full use of reinforced concrete structure post and structure roof beam makes vertical load pass through the structure roof beam and transmits interim bearing structure on, makes the bearing capacity obtain reasonable conversion, guarantees the reverse in-process security of demolising. The supporting short column is mainly used for bearing vertical load, and the supporting short column can be detachably spliced together and can be reused, so that part of dismantling cost is reduced. The bearing plate is used for uniformly converting vertical supporting force, and the effect of vertical supporting is guaranteed. Through the vertical direct conversion of the force, the stress is more direct and safe.
Description
Technical Field
The utility model belongs to the technical field of the device is demolishd in the building reverse direction, especially involve a reinforced concrete structure reverse demolishs interim conversion equipment that supports.
Background
At present, the urban building is demolished by a reinforced concrete structure in a large proportion, the reinforced concrete is generally traditionally demolished by mainly mechanical demolition and blasting demolition and manually demolishing the reinforced concrete in an auxiliary demolition mode, demolishing of a high-rise building is still mainly controlled blasting, and blasting demolition and mechanical demolition are repeated. These traditional demolition methods are more suitable for suburban or more remote houses. The construction of a building in a town or a city with a small building density takes into consideration the influence on the surrounding environment, including the generation of noise, the generation of dust, whether the construction is possible at night, the influence on surrounding traffic, and the like. These factors all result in buildings in towns or urban areas that cannot be removed by traditional violent dismantling.
Reverse demolish and begin then from bottom to top successive layer from the building bottom and demolish, demolish the in-process because the construction plane is subaerial always, can reduce the security that the assurance that the apparatus delivery height just so can be better demolishd for the construction progress simultaneously, can effectual reduction dust and the influence of noise moreover to can be at night operation, reduction of erection time.
The difficulty of reverse dismantling is how to safely convert the vertical supports and enable more efficient construction. The invention discloses a reverse dismantling structure, which is called as 201810885073.1, and discloses a reverse dismantling structure, wherein the stress conversion of the structure is realized by lateral conversion through a bracket, each column of each layer needs to be punched on the upper side column close to a beam to insert a stress member during installation, and the lower side needs to be punched to insert the stress member, so that the construction cost is increased, the construction progress is influenced, and meanwhile, all forms need to be dismantled when the layer is constructed to the last short column, so that the labor intensity of workers is increased, and the construction progress is also influenced.
Therefore, there is a need in the art for a new solution to solve this problem.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a reinforced concrete structure reverse demolishs interim support conversion equipment is used for solving the technical problem that the reverse demolishs structure construction cost height, workman's intensity of labour is high, the construction progress is slow of prior art.
The temporary support conversion device for reversely dismantling the reinforced concrete structure comprises jacks, bearing plates, short column connecting pieces, short supporting columns and L-shaped steel, wherein the jacks are arranged on two sides of a reinforced concrete structure column, and the upper parts of jacking devices of the jacks are fixedly connected with the bearing plates; the upper part of the bearing plate is fixedly connected with a supporting short column through a short column connecting piece; the supporting short columns are multiple in number, short column connecting pieces are fixedly arranged on the upper portions and the lower portions of the supporting short columns, the supporting short columns are sequentially and fixedly connected to the lower portion of the structural beam from bottom to top through the short column connecting pieces, and the supporting short column positioned at the uppermost portion is fixedly connected with the bearing plate through the short column connecting pieces; the upper part of the bearing plate is fixedly connected with the L-shaped steel; two L-shaped steels are symmetrically arranged on the structural beam; the kink outside of L shaped steel is provided with L shaped steel bolted port, the bottom surface fixed connection of a face and the structure roof beam of L shaped steel, another face and the lateral wall fixed connection of structure roof beam of L shaped steel, and two L shaped steel that the symmetry set up pass through L shaped steel bolted port and bolt fixed connection.
The jack is connected with the electronic numerical control equipment, and the electronic numerical control equipment controls the jack to lift up or descend.
The outer surface of the bearing plate is a rough surface.
The cross section of the supporting short column is circular or rectangular.
Through the above design scheme, the utility model discloses following beneficial effect can be brought:
the utility model discloses interim bearing structure is constituteed to well jack, bearing board, supporting column and L shaped steel, and a pair of interim bearing structure arranges in the both sides of structure post, replaces the vertical bearing capacity of structure post transmission, and the bearing capacity of make full use of reinforced concrete structure post and structure roof beam makes vertical load pass through the structure roof beam and transmits interim bearing structure on, makes the bearing capacity obtain reasonable conversion, guarantees the reverse in-process security of demolising. The supporting short column is mainly used for bearing vertical load, and the supporting short column can be detachably spliced together and can be reused, so that part of dismantling cost is reduced. The bearing plate is used for uniformly converting vertical supporting force, and the effect of vertical supporting is guaranteed. Through the vertical direct conversion of the force, the stress is more direct and safe.
The utility model discloses though initial stage cost is with high costs, but all demolish the component and all can cyclic utilization, not only reduce like this and demolish the cost but also can work on low platform and reduce and demolish the progress that the process danger coefficient accelerated to demolish.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is the utility model discloses reinforced concrete structure removes the reverse structure sketch map that supports conversion equipment temporarily.
Fig. 2 is the schematic structural diagram of the temporary support conversion device for reverse demolition of a reinforced concrete structure in the embodiment of the present invention.
In the figure, 1-a jack, 2-a bearing plate, 3-a short column connecting piece, 4-a supporting short column, 5-L section steel, 6-L section steel bolt ports, 7-a structural column, 8-a structural beam and H-one-time cutting height.
Detailed Description
The invention will be described in further detail below with reference to the following description of the drawings, which can be defined by the claims or implemented in many different ways.
As shown in the figure, the temporary support conversion device for reverse dismantling of the reinforced concrete structure comprises a jack 1, a bearing plate 2, a short column connecting piece 3, a supporting short column 4 and L-shaped steel 5. The temporary supporting and converting device is supported at the bottom of the reinforced concrete structure close to the structural beam 8. The jack 1 is positioned at the lowest end of the supporting structure of the layer, namely is connected with the lowest section of the supporting short column 4. The supporting short columns 4 are mainly used for bearing vertical loads, and the supporting short columns 4 are detachably spliced together. And a pair of L-shaped steels 5 are integrally fixed on the side surface and the bottom surface of the structural beam 8 from the left and the right of the structural beam 8 respectively, and the lower parts of the L-shaped steels 5 are connected with the uppermost supporting short column 4. The bearing plate 2 is connected below the pair of L-shaped steels 5 and at the joint of the jack 1 and the supporting short column 4 through bolts and used for uniformly converting vertical supporting force and ensuring the effect of vertical supporting.
The general size of the bearing plate 2 is slightly smaller than the width of the structural beam 8, so that the bearing plate can be placed below the pair of L-shaped steels 5 more conveniently, and meanwhile, the bearing plate is used for more uniformly transferring vertical load from the structural beam 8 to the temporary supporting and converting device, the outer surface of the bearing plate 2 is a roughened surface with chisels, friction force is increased, and supporting safety is improved.
The jacks 1 are controlled by a set of electronic numerical control equipment, and the electronic numerical control equipment can simultaneously and uniformly control the jacks 1 on all the layers to lift and descend or control the jacks 1 to lift and descend independently.
The supporting short columns 4 are mainly used for bearing vertical loads, the supporting short columns 4 are detachably spliced together and can be reused, and therefore a part of dismantling cost is reduced. The supporting stub 4 is usually 0.8m, and the cross section of the supporting stub 4 can be various shapes, and can be generally round, rectangular and the like. The supporting short columns 4 are fixedly connected together by the short column connecting pieces 3 through high-strength bolts.
The supporting short column 4, the short column connecting piece 3 and the bearing plate 2 are connected into a whole and finally act together with the jack 1 to form a supporting conversion device.
L shaped steel 5 is the thickening steel sheet of L shape, and the corner of steel sheet has the screw hole of reserving in advance to be used for making the power transmission more even to the bolted connection of a pair of L shaped steel and making as L shaped steel bolt mouth 6. A pair of L-shaped steels 5 are respectively formed into a whole from the left side and the right side of the structural beam 8 and are fixed on the side surface and the bottom surface of the structural beam 8, so that the part of the structural beam 8 can be protected and supported to avoid being damaged when vertical load is applied, and the part of the L-shaped steel can also be used for replacing stress with the bearing plate 2.
The utility model provides a pair of interim vertical bearing capacity that supports conversion equipment and replace 7 transmissions of structure post, make full use of reinforced concrete structure's structure post 7 and structure roof beam 8's bearing capacity, make vertical load pass through structure roof beam 8 and transmit interim support conversion equipment on, make the bearing capacity obtain reasonable conversion, guarantee the reverse in-process security of demolising.
This interim conversion equipment that supports can be when reinforced concrete structure is reverse demolishs, through supporting short column connecting piece 3 and bearing board and jack 1 with the vertical load conversion of this layer of structure post to a pair of strutting arrangement on, the bearing capacity of make full use of structure roof beam makes vertical load obtain reasonable conversion, guarantees the security of reverse demolishs in-process reinforced concrete structure.
Example (b):
in this embodiment, support conversion equipment for the interim for a pair of symmetry, set up respectively in two looks sides of this layer of structure post 7, make vertical load obtain reasonable conversion, guarantee the security of reverse dismantlement in-process reinforced concrete structure.
The bearing plate 2 is a part close to the structural column 7 below the structural beam 8, reserved L-shaped steel bolt openings 6 are formed in the sides of the corners of the L-shaped steels 5, the L-shaped steels 5 can be fixed on the structural beam 8 through high-strength bolts, on one hand, the stress is concentrated on one dispersion of concrete pressure generated on the concrete, on the other hand, the force of vertical load can be more uniformly applied to the structural beam 8, and the bearing plate 2 can be directly used for dispersing the load so as to save time.
The bearing plate 2 further comprises a bearing plate 2 at the joint of the jack 1 and the supporting short column 4, the bearing plate 2 can be fixed on the supporting short column 4 in a bolt connection mode and the like, and bearing capacity of the supporting short column 4 in vertical load transmission can be increased or the jack 1 can support loads from the vertical direction more uniformly.
The temporary supporting and converting device further comprises a jack 1, the pair of jacks 1 are positioned at the bottom layer of the supporting short columns 4 and connected with the supporting short columns 4 at the bottom layer, a pair of supporting short columns 4 are required to be arranged below the structural beam 8 beside each structural column 7 at the current layer, the bottom ends of the supporting short columns 4 are the numerically-controlled jacks 1, and the tonnage of the jacks 1 is determined by the dead weight of the reinforced concrete structure to be dismantled. Through setting up jack 1, can conveniently accomplish the excision of structural column 7 and the altitude mixture control of support short column 4, guarantee going on of reinforced concrete structure reverse demolish smoothly and the security.
All the paired jacks 1 are controlled by a set of unified numerical control equipment, so that the jacks can be uniformly jacked and fallen back, and can be freely jacked and fallen back. The multi-section support stubs 4 are detachably spliced together. The temporary supports replace the original structural column 7 supports, when the dismantling process is carried out, a section of structural column 7 can be uniformly cut off, the cutting length is controlled within the maximum height of the jack 1, the cut reinforced concrete structural column 7 can be conveniently taken out from the bottom of the column, the integral cutting can be adopted within the limit of height, then the numerical control electronic jack 1 is used for uniformly falling back to the incision of the structural column 7, the cut surface of the structural column 7 is butted with the lower incision of the chiseled part, the cut structural column 7 bears the load, then the jack 1 falls back to the cutting height and then the supporting short columns 4 on the uppermost layer are disassembled, the supporting short columns 4 are fixedly connected through the short column connecting pieces 3 and the high-strength bolts, the connecting structure strength between the adjacent supporting short columns 4 can be ensured, the support plate 2 on the uppermost support post 4 is then mounted on the second section support post 4.
At last when demolising the superiors supporting post 4 and the jack 1 that rises again, the transmission of the vertical load that leads to is unstable in consideration of the transmission of power, in order to guarantee the validity of vertical load conversion, in order to guarantee the bearing effect of supporting post 4 to the vertical production of structural column 7, can adopt to alternate and demolish the superiors supporting post 4, then support board 2 is installed back at once and is made supporting post 4 to with the highly uniform of cutting back structural column 7 to a pair of jack 1, then demolish next a pair of top layer supporting post 4, so repeated both accelerated the construction progress and saved the manpower, the production of the expense of material and machinery, and guaranteed the validity of demolishing the transmission of process vertical power and the influence of the horizontal force that probably produces, guaranteed to demolish reverse security.
When the temporary support conversion device for reverse demolition of the reinforced concrete structure is used for reverse demolition of the reinforced concrete structure, the following steps are adopted:
step one, selecting a reverse demolition initial floor according to the tonnage of a jack 1, demolishing a filler wall and an upper floor of the initial floor, reserving a structural column 7 and a structural beam 8 of the demolition floor, and preparing for reversely demolishing the reinforced concrete structural beam 8 and the structural column 7;
if the integral tonnage of the building body is larger than the tonnage of the jack 1, the initial floor is selected from the middle floor, and the limit is selected as the tonnage of the lower floor of the initial floor which is larger than the tonnage of the jack 1; the integral tonnage of the building body is smaller than that of the jack 1, and the initial floor is one floor.
And step two, symmetrically fixing a pair of L-shaped steels 5 at the lower part and two sides of a structural beam 8 of a demolition floor through an L-shaped steel bolt hole 6 by using a high-strength bolt.
And step three, fixedly installing the jack 1 on the ground or removing the upper part of the next floor structural beam 8 of the floor.
Fixing a bearing plate 2 on the upper part of the jack 1, fixedly installing short column connecting pieces 3 on the upper part and the lower part of a short supporting column 4, and fixedly connecting the short supporting column 4 from bottom to top to the position right below the L-shaped steel 5 by connecting the short supporting column 4 with the short column connecting pieces 3 through high-strength bolts;
step five, fixedly connecting the supporting short column 4 at the top layer with the lower part of the L-shaped steel 5 through a high-strength bolt and a bearing plate 2, and finishing the installation of temporary supporting conversion devices at two sides of one structural column 7;
step six, repeating the step two to the step five until the temporary support conversion devices on the two sides of all the structural columns 7 of the demolition floor are installed;
seventhly, setting a primary cutting height H on the electronic numerical control equipment, and simultaneously controlling and lifting the jacking device of the jack 1 by the electronic numerical control equipment, wherein the lifting height of the jacking device is slightly higher than the set primary cutting height H;
step eight, dismantling the structural columns 7 of the dismantling floors, wherein the dismantling modes are divided into two modes, and one mode is selected from the two modes to dismantle the structural columns 7;
1. the first dismantling mode is as follows:
firstly, keeping the height of a jack 1 unchanged, temporarily supporting a conversion device to bear vertical load, sequentially cutting the structural columns 7 of the demolished floors at a position which is away from the bottom end by a height H through cutting equipment, and taking out the cut structural columns 7;
secondly, descending all the jacks 1 to the cutting height;
thirdly, selecting a structural column 7, and if the building structure is an statically indeterminate structure, adopting other temporary supporting and converting devices except the temporary supporting and converting devices on the two sides of the selected structural column 7 to bear vertical load, lowering the jack 1 on one side of the structural column 7 to a position below a primary cutting height H, removing the uppermost supporting short column 4 on the upper part of the jack 1 on the side, and jacking the jack 1 on the side to the supporting height;
lowering the jack 1 at the other side of the structural column 7 to a position below the primary cutting height H, removing the uppermost supporting short column 4 at the upper part of the jack 1 at the side, and jacking the jack 1 at the side to the supporting height, so that the temporary supporting and converting devices at two sides of the structural column 7 bear vertical load;
fifthly, repeating the third step and the fourth step until the lowest supporting short column 4 of the layer is completely removed;
sixthly, repeating the steps from the first step to the fifth step, cutting the structural column 7 section by section from bottom to top, dismantling the supporting short column 4 section by section from top to bottom, dismantling the L-shaped steel 5 wrapped on the structural beam 8 while dismantling the last supporting short column 4, and reserving one section of the structural column 7, wherein the reserved height is higher than the height of the jack 1 after the jacking device is completely descended;
seventhly, the electronic numerical control equipment simultaneously controls the jacking devices of all the jacks 1 to descend to the lowest point, solid wood cushion blocks or steel cushion blocks are placed at the lower part of the structural beam 8, the structural beam 8 is cut in sections through cutting equipment to ensure safety and outward transportation convenience during cutting, and the structural beam 8 is transported away from a loading vehicle by adopting mechanical equipment such as a forklift;
2. the second dismantling mode is as follows:
firstly, keeping the height of a jack 1 unchanged, temporarily supporting a conversion device to bear vertical load, sequentially cutting the structural columns 7 of the demolished floors at a position which is away from the bottom end by a height H through cutting equipment, and taking out the cut structural columns 7;
secondly, descending all the jacks 1 to the cutting height;
thirdly, when the structure is not a statically indeterminate structure, taking the section of the cut structural column 7 as a temporary vertical supporting load, and dismantling the uppermost supporting short columns 4 at two sides of all the structural columns 7;
fourthly, the electronic numerical control equipment simultaneously controls all the jacks 1 to jack up to the supporting height, so that the temporary supporting and converting devices on the two sides of the structural column 7 bear vertical loads;
fifthly, repeating the steps from the first step to the fourth step, cutting the structural column 7 section by section from bottom to top, dismantling the supporting short column 4 section by section from top to bottom, dismantling the L-shaped steel 5 wrapped on the structural beam 8 while dismantling the last supporting short column 4, and reserving one section of the structural column 7, wherein the reserved height is higher than the height of the jack 1 after the jacking device is completely descended;
sixthly, the electronic numerical control equipment simultaneously controls the jacking devices of all the jacks 1 to descend to the lowest point, a solid wood cushion block or a steel cushion block is placed at the lower part of the structural beam 8, the structural beam 8 is cut in sections through cutting equipment, safety in cutting and convenience in outward transportation are guaranteed, and the structural beam 8 is transported away to a loading truck by adopting mechanical equipment such as a forklift;
and step nine, repeating the step one to the step eight, fixing the position of the jack 1, assembling the temporary support conversion device again, and completing the dismantling of the whole building. It is to be noted that one more support stud 4 is needed than in the initial storey, since there is a section of unremoved structural stud 7 left by the next storey of structure.
Claims (4)
1. Reinforced concrete structure is reverse demolishs interim support conversion equipment, characterized by: the lifting jack comprises a lifting jack (1), a bearing plate (2), a short column connecting piece (3), a supporting short column (4) and L-shaped steel (5), wherein the lifting jack (1) is arranged on two sides of a reinforced concrete structure column (7), and the upper part of a lifting device of the lifting jack (1) is fixedly connected with the bearing plate (2); the upper part of the supporting plate (2) is fixedly connected with a supporting short column (4) through a short column connecting piece (3); the number of the supporting short columns (4) is plural, the upper parts and the lower parts of the supporting short columns (4) are fixedly provided with short column connecting pieces (3), the supporting short columns (4) are sequentially and fixedly connected to the lower part of the structural beam (8) from bottom to top through the short column connecting pieces (3), and the supporting short column (4) positioned at the uppermost part is fixedly connected with the bearing plate (2) through the short column connecting pieces (3); the upper part of the supporting plate (2) is fixedly connected with the L-shaped steel (5); two L-shaped steels (5) are symmetrically arranged on the structural beam (8); the bending part outer side of the L-shaped steel (5) is provided with an L-shaped steel bolt hole (6), one surface of the L-shaped steel (5) is fixedly connected with the bottom surface of the structural beam (8), the other surface of the L-shaped steel (5) is fixedly connected with the side wall of the structural beam (8), and the two L-shaped steels (5) which are symmetrically arranged are fixedly connected through the L-shaped steel bolt hole (6) and a bolt.
2. The device for reversely dismantling and temporarily supporting a reinforced concrete structure according to claim 1, wherein: the jack (1) is connected with an electronic numerical control device, and the electronic numerical control device controls the jack (1) to lift or descend.
3. The device for reversely dismantling and temporarily supporting a reinforced concrete structure according to claim 1, wherein: the outer surface of the bearing plate (2) is a rough surface.
4. The device for reversely dismantling and temporarily supporting a reinforced concrete structure according to claim 1, wherein: the cross section of the supporting short column (4) is circular or rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920424016.3U CN209837765U (en) | 2019-04-01 | 2019-04-01 | Reversal dismantling temporary support conversion device for reinforced concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920424016.3U CN209837765U (en) | 2019-04-01 | 2019-04-01 | Reversal dismantling temporary support conversion device for reinforced concrete structure |
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| Publication Number | Publication Date |
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| CN209837765U true CN209837765U (en) | 2019-12-24 |
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| CN201920424016.3U Expired - Fee Related CN209837765U (en) | 2019-04-01 | 2019-04-01 | Reversal dismantling temporary support conversion device for reinforced concrete structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838114A (en) * | 2019-04-01 | 2019-06-04 | 吉林建筑大学 | Reinforced concrete structure inversely removes temporary support conversion equipment and its operating method |
| CN111779001A (en) * | 2020-08-10 | 2020-10-16 | 郑州中原铁道工程有限责任公司第三分公司 | Support assembly, support device and bridge and culvert construction method |
| CN114776078A (en) * | 2022-04-21 | 2022-07-22 | 中建一局集团建设发展有限公司 | Adjustable type steel support changing system with multiple annular support point positions and construction method |
-
2019
- 2019-04-01 CN CN201920424016.3U patent/CN209837765U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838114A (en) * | 2019-04-01 | 2019-06-04 | 吉林建筑大学 | Reinforced concrete structure inversely removes temporary support conversion equipment and its operating method |
| CN109838114B (en) * | 2019-04-01 | 2024-01-26 | 吉林建筑大学 | Reinforced concrete structure reverse dismantling temporary support conversion device and operation method thereof |
| CN111779001A (en) * | 2020-08-10 | 2020-10-16 | 郑州中原铁道工程有限责任公司第三分公司 | Support assembly, support device and bridge and culvert construction method |
| CN114776078A (en) * | 2022-04-21 | 2022-07-22 | 中建一局集团建设发展有限公司 | Adjustable type steel support changing system with multiple annular support point positions and construction method |
| CN114776078B (en) * | 2022-04-21 | 2023-12-01 | 中建一局集团建设发展有限公司 | Adjustable section steel support replacing system with annular multi-support points and construction method |
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Granted publication date: 20191224 |