CN111997352A - Rapid installation method for scaffold wall connecting piece - Google Patents
Rapid installation method for scaffold wall connecting piece Download PDFInfo
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- CN111997352A CN111997352A CN202010856084.4A CN202010856084A CN111997352A CN 111997352 A CN111997352 A CN 111997352A CN 202010856084 A CN202010856084 A CN 202010856084A CN 111997352 A CN111997352 A CN 111997352A
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
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Abstract
The invention discloses a method for quickly installing a scaffold wall connecting piece, which comprises the following steps: s1, reserving a preformed hole when the outer wall body is used for formwork erection; s2, one end of the threaded pull rod penetrates through the reserved hole, and is sleeved with a wall gasket and screwed with a bolt; s3, sleeving a horizontal steel pipe and a steel pipe gasket on the other end of the threaded pull rod, and screwing a bolt; s4, screwing the bolts at the two sides to the middle, so that the steel pipe gasket at one side and the wall gasket at the other side are pushed by the bolts to be extruded inwards, and the horizontal steel pipe is connected to one side of the wall in an abutting mode; and S5, connecting the horizontal steel pipe with the vertical rod of the scaffold by using a fastener to complete installation. The wall connecting piece of the invention saves materials, is convenient to obtain materials and can be recycled. Compared with the traditional wall connecting piece, the wall connecting piece does not need an embedded part, the required material is simple and easy to obtain, and the bolts are used for replacing a large number of fasteners, so that the material consumption is greatly reduced. The larger the scaffold engineering quantity is, the more obvious the saving is.
Description
Technical Field
The invention is applied to the field of construction engineering construction, and particularly relates to a method for quickly installing a scaffold wall connecting piece.
Background
The instability of the scaffold is divided into integral instability and local instability, and the integral instability is a main damage form of the instability of the scaffold. The wall attachment connection realized by the wall connecting piece plays an important role in strengthening the overall stability of the scaffold, improving the stable bearing capacity of the scaffold and avoiding major accidents such as toppling or collapse. The safety and stability of the whole scaffold and the quality of a building can be ensured only by adopting a firm wall connecting mode and a simple and appropriate method, so that better economic benefit is realized. For common scaffold wall connecting pieces, the defects of complex structure, complex construction, long working time, high cost and the like exist.
The wall connecting piece of the scaffold is an important component of the scaffold, is an important connecting point between a building and the scaffold, bears and transmits load, and effectively ensures the safety of the scaffold. The novel process for constructing the scaffold and the wall connecting piece thereof is researched and developed, so that the construction quality of the scaffold can be effectively guaranteed, engineering accidents caused by the deficiency of the wall connecting piece are reduced, materials are saved, and the construction cost is reduced.
The traditional embedded wall connecting piece needs at least 2 fasteners, namely eight bolts, besides the positioning embedded steel pipe, one wall connecting piece is provided with a tightening torque of 40N m and not more than 65N m according to the specification, the construction workload of the on-site wall connecting piece is large, the technical proficiency of workers is uneven, and the work is difficult to grasp. Sometimes, a cavity is reserved in the outer wall, so that the wall connecting piece is inserted into the wall, the number of fasteners required by the wall connecting piece is more, and the engineering risk coefficient with large number can be greatly improved.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a method for quickly installing a scaffold wall connecting piece.
In order to solve the technical problem, the invention provides a quick installation method of a scaffold wall connecting piece, which comprises the following steps:
s1, when the formwork of the outer wall is erected, the reserved holes are made by drawing the reserved formwork according to the preset distance;
s2, one end of the threaded pull rod penetrates through the reserved hole, and a wall gasket is sleeved on the end of the threaded pull rod and then a bolt is screwed on the end of the threaded pull rod;
s3, sleeving a steel pipe gasket, a horizontal steel pipe and a steel pipe gasket on the other end of the threaded pull rod in sequence, and screwing a bolt to enable positioning grooves in the two groups of steel pipe gaskets to clamp the horizontal steel pipe in the middle;
s4, screwing the bolts at two sides to the middle to enable the steel pipe gasket at one side and the wall gasket at the other side to be extruded inwards under the pushing of the bolts, tightly abutting and connecting the horizontal steel pipe at one side of the wall, and enabling the horizontal steel pipe to be stressed in the process, and completing the installation of the wall connecting piece by the tension of the threaded pull rod;
and S5, connecting the horizontal steel pipe with the vertical rod of the scaffold by using a fastener to complete installation.
As a possible embodiment, before the step S2 is performed, the main sleeve of the stabilization set is inserted into the prepared hole to make the limit protruding plate at one end abut against the outer wall surface, the cap tube of the stabilization set is inserted into the prepared hole from the other side and rotated to make the internal connection thread at the inner wall engage with the connection thread at one end of the main sleeve, the cap tube stops rotating when the limit protruding plate at one end of the cap tube abuts against the outer wall surface to complete the installation of the stabilization set, and then the one end of the screw rod is directly inserted through the main sleeve and the cap tube of the stabilization set at S2.
As a possible implementation manner, further, the steel pipe gaskets in the step S3 are each provided with a gasket sleeve for passing through the threaded pull rod and a positioning groove corresponding to the size of the opening of the horizontal steel pipe.
As a possible implementation manner, further, the distance between the bolt screwed and locked in step S4 and the end of the nearest threaded pull rod is 5-10 cm.
By adopting the technical scheme, the invention has the following beneficial effects:
the wall connecting piece of the invention saves materials, is convenient to obtain materials and can be recycled. Compared with the traditional wall connecting piece, the wall connecting piece does not need an embedded part, the required material is simple and easy to obtain, and the bolts are used for replacing a large number of fasteners, so that the material consumption is greatly reduced. The larger the scaffold engineering quantity is, the more obvious the saving is. Traditional pre-buried wall connecting piece, when demolishing, the built-in fitting adopts cutting landfill processing, can't retrieve used repeatedly. After the wall connecting piece is disassembled, the pull rod piece and the nut are checked, and the wall connecting piece can be reused next time without damage and deformation, so that the cost is reduced, and the turnover rate of the part is improved. Through setting up the steel pipe gasket and the bolt of establishing the horizontal steel pipe cooperation both ends on the screw thread pull rod for even the wall spare only need screw up the bolt at both ends and can lock in the wall, compare the operation and the installation of being convenient for with traditional wall spare such as pre-buried formula or hoop formula, shortened installation time and improved operating efficiency. Carry out fixed connection through utilizing the fastener cooperation to pole setting and horizontal steel pipe and reach the purpose of being connected even wall spare and scaffold frame pole setting fast, utilize horizontal steel pipe cooperation fastener can connecting thread pull rod and pole setting, it needs to be connected with the scaffold frame pole setting with the connecting block looks after the welding to recycle the connecting block in the traditional connecting piece to have solved, the cost of manufacture is higher, the installation is inconvenient and stability and the relatively poor problem of intensity. This even preformed hole that leaves when wall spare utilizes outer wall formwork is fixed in the wall through to screw pull rod, wall body gasket and bolt, and the fixed of a bolt will be convenient operation swiftly than the fixed of fastener. For the outer scaffold engineering with large quantity and wide range, the efficiency is more obvious. The two bolts are used for stabilizing, the required connecting components are fewer, the stress is simple, the safety performance is higher, and the stability is better. The bolt does not need embedded parts, the required materials are simple and easy to obtain, and the bolts are used for replacing fasteners, so that the material consumption is greatly reduced. And the bolts, gaskets, steel pipes, pull rods and the like used by the wall connecting pieces can be repeatedly used after being disassembled, so that the economic benefit is further increased.
Drawings
The invention is described in further detail below with reference to the following figures and embodiments:
FIG. 1 is a schematic view of the present invention in an installed state;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the steel pipe gasket structure of the present invention;
FIG. 4 is a schematic view of the wall gasket structure of the present invention;
FIG. 5 is a stress diagram of a counter-pull threaded tie rod according to the present invention;
FIG. 6 is a displacement diagram of a counter-pull threaded pull rod according to the present invention;
FIG. 7 is a stress diagram of the horizontal steel pipe under pressure according to the present invention;
FIG. 8 is a diagram showing the displacement of the horizontal pressed steel pipe according to the present invention;
FIG. 9 is a schematic view of a stabilization kit according to the present invention;
fig. 10 is a schematic view of the installation state of the stabilization kit according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings.
As shown in fig. 1 to 10, the present invention provides a method for quickly installing a scaffold wall connecting member, which comprises the following steps:
s1, when formwork erecting is carried out on the outer wall body (100), drawing holes according to the preset spacing reserved formwork to form reserved holes (101);
s2, one end of the threaded pull rod (1) penetrates through the preformed hole (101), and the bolt (4) is screwed after the end is sleeved with the wall gasket (3);
s3, sleeving a steel pipe gasket (5), a horizontal steel pipe (2) and the steel pipe gasket (5) on the other end of the threaded pull rod (1) in sequence, and screwing a bolt (4) to enable positioning grooves (53) in the two groups of steel pipe gaskets (5) to clamp the horizontal steel pipe (2) in the middle;
s4, the bolts (4) on the two sides are screwed down towards the middle, so that the steel pipe gasket (5) on one side and the wall body gasket (3) on the other side are pushed by the bolts to be extruded inwards, the horizontal steel pipe (2) is tightly connected to one side of the wall body (100) in a butting mode, the horizontal steel pipe (2) is stressed in the process, and the threaded pull rod (1) is tensioned to complete installation of the wall connecting piece;
and S5, connecting the horizontal steel pipe (2) with the upright rod (200) of the scaffold by using the fastener (6) to complete installation.
As a possible embodiment, before the step S2 is performed, the main sleeve (71) of the stabilization sleeve (7) is inserted into the prepared hole (101) to make the limit protruding plate (73) at one end abut against the surface of the outer wall (100), the covering pipe (72) of the stabilization sleeve (7) is inserted into the prepared hole (101) from the other side and rotated, the internal connection thread of the inner wall is in threaded connection with the connection thread at one end of the main sleeve (71), when the limit protruding plate (73) at one end of the covering pipe (72) abuts against the surface of the outer wall (100), the rotation of the covering pipe (72) is stopped to complete the installation of the stabilization sleeve (7), and then the step S2 is performed to directly pass one end of the screw rod (1) through the main sleeve (71) and the covering pipe (72) of the stabilization sleeve (7).
As a possible implementation manner, the steel pipe gaskets (5) in the step S3 are provided with gasket sleeves (52) for penetrating through the threaded pull rods (1) and positioning grooves (53) corresponding to the sizes of the pipe orifices of the horizontal steel pipes (2).
As a possible implementation manner, further, the distance between the bolt (4) tightened and locked in the step S4 and the end of the nearest threaded pull rod (1) is 5-10 cm.
A scaffold wall connecting piece rapid installation method relates to a scaffold wall connecting piece structure which is arranged between a wall 100 and an upright stanchion 200 and comprises a threaded pull rod 1, wherein one end of the threaded pull rod 1 penetrates through a preformed hole 101 formed in the wall 100, the other end of the threaded pull rod is sleeved with a horizontal steel pipe 2, one end of the threaded pull rod 1 penetrating through the wall 100 is sleeved with a wall gasket 3, the wall gasket 3 is locked and abutted to the surface of the wall 100 through a bolt 4, one end of the threaded pull rod 1 sleeved with the horizontal steel pipe 2 is sleeved with a steel pipe gasket 5, and the steel pipe gasket 5 is locked and abutted to one end of the horizontal steel pipe 2 through the bolt 4; the horizontal steel pipe 2 is locked and abutted to one side of the wall 100 by bolts 4 at two ends of the threaded pull rod 1 in cooperation with the wall gasket 3 and the steel pipe gasket 5, and the horizontal steel pipe 2 is fixedly connected with the vertical rod 200 through the fastener 6 so as to fixedly connect the vertical rod 200 to the wall 100. The two ends of the horizontal steel pipe 2 are respectively provided with a steel pipe gasket 5 sleeved on the threaded pull rod 1, one steel pipe gasket 5 is pushed by the bolt 4 to abut against one end of the horizontal steel pipe 2, and the other steel pipe gasket 5 is abutted by the horizontal steel pipe 2 to be clamped on the surface of the wall 100. The steel pipe gasket 5 comprises a gasket main body 51, a gasket sleeve 52 penetrates through the center of the gasket main body 51, positioning grooves 53 corresponding to the horizontal steel pipes 2 are formed in the surface of the gasket main body 51, and when the steel pipe gasket 5 abuts against the two ends of each horizontal steel pipe 2, the two ends of each horizontal steel pipe 2 abut against the positioning grooves 53 correspondingly. The inner diameter of the spacer sleeve 52 is equal to the maximum outer diameter of the threaded pull rod 1. The bolt 4 is an M16 bolt, and when the bolt 4 is screwed and locked, the distance between the bolt and the nearest end of the threaded pull rod 1 is 5-10 cm.
The wall body 100 is provided with a preformed hole 200, a stabilizing sleeve 7 is arranged in the preformed hole, the stabilizing sleeve 7 comprises a main sleeve 71 and a sleeve cover pipe 72, one end of the main sleeve 71 is provided with a limiting convex plate 73, the surface of the other end of the main sleeve is provided with a connecting thread 74, one end of the sleeve cover pipe 72 is provided with the limiting convex plate 73, the inner wall of the other end of the sleeve cover pipe 72 is provided with a connecting inner thread corresponding to the connecting thread 74, and the sleeve cover pipe 72 is in rotary threaded connection with the main sleeve 71.
When the wall connecting piece is used for connecting scaffolds, one end of the threaded pull rod 1 penetrates through a preformed hole 101 formed in a wall 100, the wall gasket 3 is sleeved with the bolt 4, the steel pipe gasket 5, the horizontal steel pipe 2 and the steel pipe gasket 5 are sequentially sleeved at the other end of the threaded pull rod 1, the horizontal steel pipe 2 is clamped in the middle by the positioning grooves 53 of the two groups of steel pipe gaskets 5, the bolt 4 is screwed into the other side of the threaded pull rod 1 to push the steel pipe gasket 5 to abut against the horizontal steel pipe 2, the bolts 4 at two ends of the threaded pull rod 1 are continuously screwed, the steel pipe gasket 5 at one side and the wall gasket 3 at the other side are inwards extruded under the pushing of the bolts, the horizontal steel pipe 2 is tightly abutted against and connected to one side of the wall 100, the horizontal steel pipe 2 is stressed in the process, the threaded pull rod 1 is tensioned to complete the installation of the wall connecting.
The invention saves materials, has convenient material acquisition and can be recycled. By adopting the wall connecting piece, an embedded part is not needed, the required material is simple and easy to obtain, and the bolts are used for replacing fasteners, so that the material consumption is greatly reduced. The larger the scaffold engineering quantity is, the more obvious the saving is.
For common embedded wall connecting pieces, when the embedded pieces are dismantled, the embedded pieces are subjected to cutting and embedding treatment and cannot be recycled and reused. After the novel wall connecting piece is detached, the pull rod piece and the nut are checked, and the novel wall connecting piece is not seriously damaged or deformed and can be put into next repeated use.
A comparative listing of the performance of various common wall attachments is shown in the following table.
| Wall connecting piece | Height limitation | Safety feature | Convenience of use | Water permeability | Economy of use |
| Bracing combined method | ≤24m | Difference (D) | Good taste | Is free of | 6.6 Yuan |
| Post-anchoring method | Is free of | Difference (D) | Difference (D) | Is free of | 10.23 yuan |
| Hoop and column method | Is free of | Good taste | Difference (D) | Severe severity of disease | 41.86 yuan |
| Method for embedding steel pipe | Is free of | Good taste | Difference (D) | Severe severity of disease | 24.89 yuan |
| Novel wall connecting piece | Is free of | Good taste | Good taste | Is free of | < 6.6 yuan |
The economic calculation is to calculate the cost of each wall connecting piece according to the average construction period of the scaffold of the high-rise building, which is 8 months, and the rent of the current steel pipe fastener. The table shows that the novel wall connecting piece has obvious advantages in economic efficiency and other aspects.
The wall connecting piece is subjected to various performance tests, the bearing capacity of the novel wall connecting piece is designed by adopting a subentry coefficient design expression according to the requirement of a probability limit state design method, and the strength, the stability and the joint strength of the wall connecting piece are mainly checked and calculated.
The intensity calculation formula is as follows:
stability:
Nl＝Nlw+N0 (4)
Nlw＝1.4·ωk·Aw (5)
in the formula: sigmal-a value of tie rod tensile stress (N/mm 2); sigmay-steel pipe compressive stress value (N/mm 2); a. thes-tie rod clear cross-sectional area (mm 2); a. thec-steel pipe clear cross-sectional area (mm 2); a-wall connecting member hair cross-sectional area (mm 2); n is a radical ofl-design value of axial force (N) of wall-connecting element; n is a radical oflw-design value of axial force of wall connecting element generated by wind load; n is a radical of0The wall-connecting element restrains the axial forces generated by out-of-plane deformations of the scaffolding. Taking 2kN for the single-row frame and 3kN for the double-row frame; phi-the stability coefficient of the wall connecting piece should be valued according to the length-slenderness ratio of the wall connecting piece and the specification JGJ130-2011 appendix A table A.0.6; f. of1、f2The strength design value (N/mm2) of the steel bars and the steel materials of the wall connecting piece; omegak-standard value of wind load (N/mm 2); a. thew-frontal area of the outer side of the scaffolding covered by a single wall element (mm 2);
under the stressed working state, the wall connecting piece mainly considers the tensile ultimate strength bearing capacity of the joint of the pull rod, the bolt and the steel gasket during tensile work, and the bearing capacity of the joint of the steel pipe wall connecting piece and the scaffold during compressive work is mainly considered, and the calculation is carried out according to the following formula:
Nl≤NV (6)
in the formula: n is a radical ofVDesign values of the bearing capacity of the connection of the wall connecting element to the scaffold and the building structure are calculated according to the corresponding specification;
when the steel pipe fastener is adopted to be used as a wall connecting piece, the checking calculation of the anti-sliding bearing capacity of the fastener meets the following requirements:
Nl≤Rc (7)
in the formula: rc-design value of the slip resistance of the fastener, one right angle fastener being 8.0 kN;
the nuts at two ends of the split screw are checked, generally, the thread teeth of the nuts are damaged, and the shearing strength of the thread teeth meets the following formula:
in the formula: d-the major diameter of the nut thread;
b-thickness of thread root;
u-number of turns of thread; -
[ τ ] -allowable shear stress, and [ τ ] - [ 0.6[ σ ], [ σ ] allowable tensile stress may be generally adopted;
μz1.0, basic wind pressure ω0＝0.3kN/m2。μs1.3. phi. 1.04, wind load standard value omegak＝μz·μs·ω00.62kN/m 2. Design value N of axial force generated by wind loadlw＝1.4·ωk·Aw9.37 kN. Axial force design value N of wall connecting piecel＝Nlw+N0＝12.374kN。
1) Wall connection strength calculation
And (4) checking and calculating the tensile strength:
checking and calculating the compressive strength:
2) stability calculation
Considering that the novel wall connecting piece is only pulled when in a working state, the steel pipe is pressed, and the stability checking calculation is carried out on the steel pipe.
3) Joint strength calculation
And (3) checking and calculating the shear strength of the steel sheet:
checking and calculating nuts at two ends:
in conclusion, the wall connecting piece meets the requirements through checking calculation of actual conditions on site.
The present wall connecting element was further verified by finite element simulation analysis using Midas Gen 8.70. The simulation was performed for the tensioned counter-pulling screw and the compressed steel pipe, respectively. The material dimensions and loading conditions were the same as calculated above. The material of the counter-pulling screw rod is selected from a database Q235 in Chinese specification GB12(S), and the section is input to be 13.5mm according to the effective diameter. Input is performed based on the load calculated above. Considering that the horizontal wall connecting piece is mainly acted by axial horizontal force, the boundary constraint only fixes two directions of the section plane of the wall connecting piece. Fig. 5 and 6 show the analysis results of the split bolt of the wall connecting piece. Midas Gen calculated the maximum stress on the tension screw to be 86.4pa and the maximum tension displacement to be 0.172 mm. All meet the requirements of bearing capacity and deformation. Fig. 7 and 8 show the analysis results of the horizontal steel pipe in the wall connecting member. The maximum stress of the steel pipe calculated by Midas Gen was 29.2MPa and the maximum tensile displacement was 0.064 mm. All meet the requirements of bearing capacity and deformation.
In summary, the error of the Midas Gen calculation result and the calculation method result considered according to the specification are within 1%, so that the reliability of the calculation method is verified. The calculation result meets the requirements of relevant standard specifications, and the reliability of the wall connecting piece is verified.
The foregoing is directed to embodiments of the present invention, and equivalents, modifications, substitutions and variations such as will occur to those skilled in the art, which fall within the scope and spirit of the appended claims.
Claims (4)
1. A method for quickly installing a scaffold wall connecting piece is characterized by comprising the following steps: which comprises the following steps:
s1, when formwork erecting is carried out on the outer wall body (100), drawing holes according to the preset spacing reserved formwork to form reserved holes (101);
s2, one end of the threaded pull rod (1) penetrates through the preformed hole (101), and the bolt (4) is screwed after the end is sleeved with the wall gasket (3);
s3, sleeving a steel pipe gasket (5), a horizontal steel pipe (2) and the steel pipe gasket (5) on the other end of the threaded pull rod (1) in sequence, and screwing a bolt (4) to enable positioning grooves (53) in the two groups of steel pipe gaskets (5) to clamp the horizontal steel pipe (2) in the middle;
s4, the bolts (4) on the two sides are screwed down towards the middle, so that the steel pipe gasket (5) on one side and the wall body gasket (3) on the other side are pushed by the bolts to be extruded inwards, the horizontal steel pipe (2) is tightly connected to one side of the wall body (100) in a butting mode, the horizontal steel pipe (2) is stressed in the process, and the threaded pull rod (1) is tensioned to complete installation of the wall connecting piece;
and S5, connecting the horizontal steel pipe (2) with the upright rod (200) of the scaffold by using the fastener (6) to complete installation.
2. The method for quickly installing the scaffold wall connecting piece according to claim 1, wherein the method comprises the following steps: before the step S2, the main sleeve (71) of the stabilization sleeve (7) is inserted into the preformed hole (101) to enable the limit convex plate (73) at one end to abut against the surface of the outer wall body (100), the sleeve cover pipe (72) of the stabilization sleeve (7) is inserted into the preformed hole (101) from the other side and rotated, the internal connecting thread of the inner wall of the sleeve cover pipe is in matching threaded connection with the connecting thread at one end of the main sleeve (71), when the limit convex plate (73) at one end of the sleeve cover pipe (72) abuts against the surface of the outer wall body (100), the sleeve cover pipe (72) stops rotating to finish the installation of the stabilization sleeve (7), and when S2 is carried out, one end of the threaded pull rod (1) directly penetrates through the main sleeve (71) and the sleeve cover pipe (72) of the stabilization sleeve (7).
3. The method for quickly installing the scaffold wall connecting piece according to claim 1, wherein the method comprises the following steps: and the steel pipe gaskets (5) in the step S3 are provided with gasket sleeves (52) for penetrating through the threaded pull rods (1) and positioning grooves (53) corresponding to the sizes of pipe openings of the horizontal steel pipes (2).
4. The method for quickly installing the scaffold wall connecting piece according to claim 1, wherein the method comprises the following steps: and in the step S4, the distance between the bolt (4) screwed and locked in the step S4 and the closest end of the threaded pull rod (1) is 5-10 cm.
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| CN113338606A (en) * | 2021-06-21 | 2021-09-03 | 中建科工集团有限公司 | Wall connecting piece and outer scaffold mounting structure |
| CN113882654A (en) * | 2021-10-27 | 2022-01-04 | 中国建筑第八工程局有限公司 | Wall connecting device capable of being buckled with outer scaffold through turnover disc |
| CN114378585A (en) * | 2022-03-22 | 2022-04-22 | 中国核工业中原建设有限公司 | Reusable outer frame wall connecting piece machining device and method |
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| CN113338606A (en) * | 2021-06-21 | 2021-09-03 | 中建科工集团有限公司 | Wall connecting piece and outer scaffold mounting structure |
| CN113882654A (en) * | 2021-10-27 | 2022-01-04 | 中国建筑第八工程局有限公司 | Wall connecting device capable of being buckled with outer scaffold through turnover disc |
| CN114378585A (en) * | 2022-03-22 | 2022-04-22 | 中国核工业中原建设有限公司 | Reusable outer frame wall connecting piece machining device and method |
| CN114378585B (en) * | 2022-03-22 | 2022-07-26 | 中国核工业中原建设有限公司 | Reusable outer frame wall connecting piece machining device and method |
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