CN113636466A - Portal frame for building demolition and demolition method - Google Patents
Portal frame for building demolition and demolition method Download PDFInfo
- Publication number
- CN113636466A CN113636466A CN202110721381.2A CN202110721381A CN113636466A CN 113636466 A CN113636466 A CN 113636466A CN 202110721381 A CN202110721381 A CN 202110721381A CN 113636466 A CN113636466 A CN 113636466A
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- China
- Prior art keywords
- building
- demolition
- cutting
- portal frame
- sequentially
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
- B66C5/04—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods with runways or tracks supported for movements relative to bridge or gantry
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/08—Runners; Runner bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/14—Trolley or crane travel drives
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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
Abstract
The invention provides a portal frame for demolishing a building and a demolishing method, wherein the portal frame for demolishing the building comprises: the crossbeam both ends are provided with adjustable landing leg, the bottom of adjustable landing leg is provided with the walking wheel, but sliding connection has electric block on the crossbeam, adjustable landing leg includes adjustment mechanism, adjustment mechanism is used for adjusting the crossbeam makes the crossbeam is parallel with the component of being lifted by the crane. According to the portal frame for building demolition, the adjustable support legs with the travelling wheels are arranged at the two ends of the cross beam, so that the position of the whole portal frame can be adjusted conveniently, the adjustment mechanism is arranged on the adjustable support legs, the cross beam and a lifted member can be ensured to be parallel, the stress direction is controlled, the overall structure is simple, the portal frame is suitable for an operation environment with small space and incapable of operating by adopting conventional lifting equipment, the building demolition process is stable, the efficiency is high, and the construction cost can be greatly saved.
Description
Technical Field
The invention relates to the technical field of old-to-old dismantling of building construction engineering, in particular to a portal frame for dismantling a building and a dismantling method.
Background
With the popularization of the concepts of green, energy saving, material saving and the like in the building industry of China, when the original factory buildings and house buildings cannot meet the functional requirements or the use functions are changed, the original buildings need to be modified and reinforced. In the process of carrying out local transformation such as demolition to old house, receive the influence of conditions such as horizontal position and space restriction, often lead to some conventional jack-up lifting device can't carry out normal operation, demolish then can greatly increased construction cost through adopting big arm exhibition high-power equipment to carry out small-size concrete member, under the prerequisite of guaranteeing construction safety, according to on-the-spot actual conditions demand, need carry out optimal design to conventional demolition method.
Disclosure of Invention
The invention provides a portal frame for demolishing a building and a demolishing method, which are used for solving the defect that normal hoisting equipment cannot normally operate due to the influence of conditions such as horizontal position, space limitation and the like in the process of local demolition and the like of an old house in the prior art, and realizing demolition of building components in a narrow space, stable demolition process and convenient position adjustment.
The invention provides a portal frame for demolishing a building, which comprises: the beam, two ends of the beam are provided with adjustable legs, the bottom of the adjustable legs is provided with walking wheels, the beam is slidably connected with an electric hoist,
the adjustable leg comprises an adjusting mechanism for adjusting the cross beam to be parallel to the lifted member.
According to the portal frame for demolishing the building, provided by the invention, the adjusting mechanism comprises a threaded column, the threaded column is in threaded connection with the bottom beam of the adjustable supporting leg,
the threaded post includes a base.
According to the portal frame for demolishing the building, each adjustable supporting leg comprises two threaded columns, and the two threaded columns are used for adjusting the levelness of the adjustable supporting leg.
According to the portal frame for building demolition, the traveling wheels comprise brake controllers, and the brake controllers are used for limiting the movement and the stop of the traveling wheels.
The invention also provides a building dismantling method, which comprises the following steps:
carrying out accurate paying-off positioning on a part to be dismantled, and determining the position of a portal frame for dismantling the building;
sequentially hoisting the dismantled components from the bottom building to the top building and cutting;
and the gantry for dismantling the building sequentially hoists the cut components to the bottom floor.
According to the building demolition method provided by the present invention, the step of sequentially lifting and cutting the demolished members from the bottom floor to the top floor comprises:
sequentially hoisting and cutting the floor slab from the bottom building to the top building;
and sequentially lifting and cutting the beam from the bottom building to the top building.
According to the building demolition method provided by the invention, the step of sequentially hoisting and cutting the building beam from the bottom building to the top building comprises the following steps:
sequentially hoisting and cutting the secondary beam from the bottom building to the top building;
and sequentially hoisting and cutting the main beam from the bottom building to the top building.
According to the building demolition method provided by the invention, the step of sequentially hoisting and cutting the floor panels from the bottom floor to the top floor comprises the following steps:
anchoring bolts to the floor panels;
hoisting the building to the bolt by using a portal frame for dismantling;
the floor panels are cut along the cutting locations.
According to the building demolition method provided by the invention, the step of sequentially lifting and cutting the beam from the bottom floor to the top floor comprises the following steps:
reinforcing and back-jacking the cantilever end of the beam;
the beam is lifted and cut.
According to the building demolition method provided by the invention, the stress position of the portal frame for demolition of the building needs to be readjusted each time the demolished component is hoisted until the stress is vertical.
According to the portal frame for building demolition, the adjustable support legs with the travelling wheels are arranged at the two ends of the cross beam, so that the position of the whole portal frame can be adjusted conveniently, the adjustment mechanism is arranged on the adjustable support legs, the cross beam and a lifted member can be ensured to be parallel, the stress direction is controlled, the overall structure is simple, the portal frame is suitable for an operation environment with small space and incapable of operating by adopting conventional lifting equipment, the building demolition process is stable, the efficiency is high, and the construction cost can be greatly saved.
Further, the invention also provides a building demolition method, which adopts the portal frame for demolition of buildings, so that the portal frame for demolition of buildings has the advantages of the portal frame for demolition of buildings.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a portal frame for demolishing a building, provided by the invention;
FIG. 2 is one of the flow diagrams of the building demolition method provided by the present invention;
FIG. 3 is a second schematic flow chart of the building demolition method provided by the present invention;
FIG. 4 is a third schematic flow chart of a method for demolishing a building according to the present invention;
FIG. 5 is a fourth schematic flow chart of a method of demolition of a building provided by the present invention;
fig. 6 is a fifth flowchart illustrating a building demolition method according to the present invention.
Reference numerals:
100: a cross beam; 101: an adjustable leg; 102: a traveling wheel;
103: an electric hoist; 104: an adjustment mechanism; 105: a bottom beam;
106: a support beam; 200: and (4) a lifted member.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Embodiments of the present invention will be described below with reference to fig. 1 to 6. It is to be understood that the following description is only exemplary embodiments of the present invention and is not intended to limit the present invention.
As shown in fig. 1, the present invention provides a gantry for demolishing a building, including: the adjustable supporting legs 101 are arranged at two ends of the cross beam 100 and the cross beam 100, the walking wheels 102 are arranged at the bottoms of the adjustable supporting legs 101, and the electric hoist 103 is connected to the cross beam 100 in a sliding mode.
The adjustable support leg 101 comprises an adjusting mechanism 104, and the adjusting mechanism 104 is used for adjusting the cross beam 100 to enable the cross beam 100 to be parallel to the lifted member 200.
In other words, two adjustable legs 101 are respectively provided at both ends of the cross beam 100, and the adjustable legs 101 are moved on the top of the building by the road wheels 102.
In addition, the adjusting mechanism 104 can horizontally adjust the gantry for building demolition within a certain gradient range of the top of the building, so as to ensure the stability of the gantry for building demolition erecting operation.
Before the hoisting operation, the walking wheels 102 are finely adjusted to ensure that the electric hoists 103 are adjusted to be positioned in the same vertical direction with the hoisted member 200, the stress is ensured to be vertical, the safety and stability of the equipment are ensured, and then the adjusting mechanism 104 is adjusted to ensure that the straight lines where the lifting hooks of the electric hoists 103 arranged on the cross beam 100 are positioned are parallel to the hoisted member 200.
Furthermore, two walking electric hoists 103 are installed on the beam 100 and steel wire ropes with effective lengths are configured, and the local structure of the house is dismantled by the method that the electric hoists 103 dismantle and hoist the floor panel and the beam body.
In order to ensure the walking safety of the portal frame for demolishing the building, the two adjustable supporting legs have the angle of 101 degrees which is larger than the maximum span of the lifted component 200 by at least 1m, namely the walking safety distance on two sides is minimum and is not smaller than 50 cm. The total lifting capacity of the two electric hoists 103 is 1.5 times greater than the weight of the lifted member 200, and the use safety factor of the portal frame for demolishing the building is ensured to reach 1.5.
When the portal frame for building demolition is used for hoisting and demolishing the slab-type concrete member, 4 expansion bolts can be symmetrically implanted into the concrete slab to serve as effective hoisting points.
When the long bar type concrete member is dismantled by using the portal frame for building dismantling, steel wire ropes can be symmetrically bolted in the range of the two ends 1/3 of the bar type concrete member to serve as effective hoisting points.
When the steel member is hoisted and dismantled by utilizing the portal frame for building dismantling, the hoisting rings can be symmetrically welded on the steel member to serve as effective hoisting points.
In an alternative embodiment of the invention, the adjustment mechanism 104 comprises a threaded post that is threadedly connected to the bottom beam 105 of the adjustable leg 101.
Further, the threaded post includes a base.
Specifically, when the position of the gantry for building demolition needs to be adjusted, the screw post needs to be retracted and moved by the traveling wheels 102. After the position of the portal frame for building demolition is confirmed, the threaded columns are adaptively adjusted according to the positions of the electric hoists 103 and the hoisted members 200, so that the beam 100 is parallel to the hoisted members 200, namely, straight lines where the lifting hooks of the electric hoists 103 are located are parallel to the hoisted members 200, and the stress is stable.
In another alternative embodiment of the invention, each adjustable leg 101 comprises two threaded columns for adjusting the levelness of the adjustable leg.
Further, when there is only one threaded post on the adjustable leg 101 on both sides of the beam 100, the tilt angle of the beam 100 in the X-plane can be adjusted by adjusting the threaded post. When two threaded columns are installed on the adjustable supporting leg 101, the inclination angle of the cross beam 100 on the Z plane can be realized by adjusting any threaded column on the same adjustable supporting leg.
In this embodiment, the adjustable leg 101 is a triangular frame comprising two inclined sides and a base beam 105, wherein the base beam 105 is perpendicular to the cross beam 100. Also, the adjustment mechanism 104 and the road wheels 102 are both provided on the bottom beam 105.
In another embodiment of the invention, the adjustable leg 101 further comprises a middle support beam 106, wherein two threaded columns are placed on either side of the support beam 106.
In one embodiment of the invention, the road wheels include brake controls for limiting the movement and stopping of the road wheels.
Furthermore, 4 walking wheels 102 are arranged on the portal frame for building dismantling, the walking wheels 102 can adopt universal casters, and after the brake controller is released, the portal frame for building dismantling can be pushed manually to be in place, so that the convenience of operation during circular operation is greatly improved.
As shown in fig. 2, a building demolition method includes the steps of:
s1: carrying out accurate paying-off positioning on a part to be dismantled, and determining the position of a portal frame for dismantling the building;
s2: sequentially hoisting the dismantled components from the bottom building to the top building and cutting;
s3: and the gantry for dismantling the building sequentially hoists the cut components to the bottom floor.
In other words, after the location of the gantry for demolition of the building is located, the demolished component is operated from the bottom floor, for example, the component of floor 1 is demolished first, then the component is cut, and then the cut component is sent to the bottom floor by the gantry for demolition of the building.
And then dismantling the components of the 2 nd building, cutting the components, and conveying the cut components to the bottom building by a portal frame for building dismantling.
And the rest is 3 th, 4 th, and the rest are the same until the top floor.
In other words, when the multi-layer floor slab needs to be dismantled, in order to facilitate the transportation and cleaning of construction waste, the construction can be carried out in the sequence from bottom to top, the lowest layer of components are dismantled first, and then the components are dismantled layer by layer upwards.
In a specific embodiment of the invention, the stress position of the gantry for demolishing the building needs to be readjusted each time the demolished member is hoisted, i.e. the electric hoist 103 and the hoisted member 200 are in the same vertical direction until the stress is vertical.
Further, as shown in fig. 3, in an alternative embodiment of the present invention, the step of sequentially lifting and cutting the removed members from the bottom floor to the top floor comprises:
s11: sequentially hoisting and cutting the floor slab from the bottom building to the top building;
s12: and sequentially lifting and cutting the beam from the bottom building to the top building.
Furthermore, the floor panels are dismantled from bottom to top, and then the beams are dismantled from bottom to top.
As shown in fig. 4, in addition, in one embodiment of the present invention, the step of sequentially lifting the building beam from the bottom to the top and cutting comprises:
s21: sequentially hoisting and cutting the secondary beam from the bottom building to the top building;
s22: and sequentially hoisting and cutting the main beam from the bottom building to the top building.
Specifically, the secondary beam is dismantled first after the floor panel is dismantled, and then the main beam is dismantled.
As shown in fig. 5, in the embodiment of the present invention, the steps of sequentially lifting and cutting the floor panels from the bottom floor to the top floor include:
s31: anchoring bolts to the floor panels;
s32: hoisting the building to the bolt by using a portal frame for dismantling;
s33: the floor panels are cut along the cutting locations.
Specifically, a certain number of anchor bolts are arranged on the dismantled floor slab, and the dismantled floor slab is fixed well by an electric hoist hook of a portal frame for dismantling the building through the anchor bolts; cutting the floor slab by a concrete cutting machine, and hoisting the cut floor slab to a bottom floor by an electric hoist; the above method is repeated to remove the floor panels block by block.
As shown in fig. 6, for the steps of sequentially lifting and cutting the beam from the bottom floor to the top floor, in an alternative embodiment of the present invention, the method comprises:
s41: reinforcing and back-jacking the cantilever end of the beam;
s42: the beam is lifted and cut.
In other words, for the beam forming the cantilever end after being dismantled, the cantilever end needs to be reinforced and jacked back, and then the beam is hoisted and cut, so that the cantilever end is not left when the beam is dismantled.
Accurately positioning a building in place by using a portal frame; fixing the building by using a portal frame and checking whether the equipment performance is normal or not; after the electric hoist hook fixes the detached beam through a steel wire rope, a cutting machine and manual work are adopted to cut and chisel the beam body; slowly conveying the disassembled beam to the first floor through an electric hoist;
1) the method can be used for carrying out dismounting and hoisting operation construction in a narrow space where common hoisting equipment is difficult to enter;
2) the dismounting hoisting equipment is provided with universal casters, and can walk on the horizontal plane by hand, so that the circular operation is convenient;
3) compared with the conventional demolition operation construction method, the method can carry out demolition operation construction from bottom to top, and can accelerate the construction progress;
4) compared with the conventional demolition operation construction method, the condition that large-scale equipment is adopted for hoisting small pieces is avoided, and the construction cost can be reduced.
According to the portal frame for dismantling the building, the adjustable supporting legs with the walking wheels are arranged at the two ends of the cross beam, so that the position of the whole portal frame can be conveniently adjusted, the electric hoist and a lifted member can be ensured to be in the same vertical direction by arranging the adjusting mechanisms on the adjustable supporting legs, the stress direction is controlled, the whole structure is simple, the portal frame is suitable for an operation environment with a small space, the building dismantling process is stable, and the efficiency is high.
Further, the invention also provides a building demolition method, which adopts the portal frame for demolition of buildings, so that the portal frame for demolition of buildings has the advantages of the portal frame for demolition of buildings.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A gantry for demolition of buildings, comprising: the beam, two ends of the beam are provided with adjustable legs, the bottom of the adjustable legs is provided with walking wheels, the beam is slidably connected with an electric hoist,
the adjustable leg comprises an adjusting mechanism for adjusting the cross beam to be parallel to the lifted member.
2. The gantry for demolition of buildings according to claim 1, wherein the adjusting mechanism includes a threaded post that is threadedly connected with the bottom beam of the adjustable leg,
the threaded post includes a base.
3. The gantry for demolition of buildings according to claim 2, wherein each of the adjustable legs includes two of the threaded columns for adjusting the levelness of the adjustable leg.
4. The gantry for demolition of buildings according to claim 1, wherein the road wheels include brake controls for limiting movement and stopping of the road wheels.
5. A method of demolishing a building, comprising the steps of:
carrying out accurate paying-off positioning on a part to be dismantled, and determining the position of a portal frame for dismantling the building;
sequentially hoisting the dismantled components from the bottom building to the top building and cutting;
and the gantry for dismantling the building sequentially hoists the cut components to the bottom floor.
6. The building demolition method according to claim 5, wherein the step of sequentially lifting demolished members from bottom to top and cutting comprises:
sequentially hoisting and cutting the floor slab from the bottom building to the top building;
and sequentially lifting and cutting the beam from the bottom building to the top building.
7. The building demolition method according to claim 6 wherein the step of sequentially lifting and cutting the building beams from bottom to top comprises:
sequentially hoisting and cutting the secondary beam from the bottom building to the top building;
and sequentially hoisting and cutting the main beam from the bottom building to the top building.
8. The building demolition method according to claim 6 wherein the step of sequentially lifting and cutting the floor panels from bottom to top comprises:
anchoring bolts to the floor panels;
hoisting the building to the bolt by using a portal frame for dismantling;
the floor panels are cut along the cutting locations.
9. The building demolition method according to claim 6 wherein the step of sequentially lifting and cutting beams from bottom to top comprises:
reinforcing and back-jacking the cantilever end of the beam;
the beam is lifted and cut.
10. A method as claimed in claim 5, wherein the gantry is re-adjusted in force position each time the demolished member is hoisted until the force is vertical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110721381.2A CN113636466A (en) | 2021-06-28 | 2021-06-28 | Portal frame for building demolition and demolition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110721381.2A CN113636466A (en) | 2021-06-28 | 2021-06-28 | Portal frame for building demolition and demolition method |
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| Publication Number | Publication Date |
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| CN113636466A true CN113636466A (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110721381.2A Pending CN113636466A (en) | 2021-06-28 | 2021-06-28 | Portal frame for building demolition and demolition method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704122A (en) * | 2022-04-19 | 2022-07-05 | 北京首钢建设集团有限公司 | Method for dismantling roof of existing building |
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| JP2014201931A (en) * | 2013-04-03 | 2014-10-27 | 清水建設株式会社 | Method of demolishing building |
| CN208791035U (en) * | 2018-05-29 | 2019-04-26 | 中铁十一局集团第六工程有限公司 | Solid concrete roabed assembles portal frame with rail |
| CN111691699A (en) * | 2020-06-17 | 2020-09-22 | 五冶集团上海有限公司 | Construction method for replacing vestibule floor slab |
| CN112431439A (en) * | 2020-11-06 | 2021-03-02 | 中铁十一局集团有限公司 | Mechanized crushing and dismantling method for low-rise building |
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2021
- 2021-06-28 CN CN202110721381.2A patent/CN113636466A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832034A (en) * | 2010-04-22 | 2010-09-15 | 上海市第一建筑有限公司 | Construction method of whole reverse replacement of structure |
| JP2014201931A (en) * | 2013-04-03 | 2014-10-27 | 清水建設株式会社 | Method of demolishing building |
| CN208791035U (en) * | 2018-05-29 | 2019-04-26 | 中铁十一局集团第六工程有限公司 | Solid concrete roabed assembles portal frame with rail |
| CN111691699A (en) * | 2020-06-17 | 2020-09-22 | 五冶集团上海有限公司 | Construction method for replacing vestibule floor slab |
| CN112431439A (en) * | 2020-11-06 | 2021-03-02 | 中铁十一局集团有限公司 | Mechanized crushing and dismantling method for low-rise building |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704122A (en) * | 2022-04-19 | 2022-07-05 | 北京首钢建设集团有限公司 | Method for dismantling roof of existing building |
| CN114704122B (en) * | 2022-04-19 | 2023-12-01 | 北京首钢建设集团有限公司 | Method for dismantling roof of existing building |
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