CN111851985A - Scaffold wall connecting piece - Google Patents
Scaffold wall connecting piece Download PDFInfo
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- CN111851985A CN111851985A CN202010856117.5A CN202010856117A CN111851985A CN 111851985 A CN111851985 A CN 111851985A CN 202010856117 A CN202010856117 A CN 202010856117A CN 111851985 A CN111851985 A CN 111851985A
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- steel pipe
- gasket
- wall body
- wall
- pull rod
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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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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The invention discloses a scaffold wall connecting piece, which is arranged between a wall body and a vertical rod and comprises a threaded pull rod, wherein one end of the threaded pull rod penetrates through a preformed hole formed in the wall body, the other end of the threaded pull rod is sleeved with a horizontal steel pipe, one end of the threaded pull rod penetrating through the wall body is sleeved with a wall body gasket, the wall body gasket is locked and abutted to the surface of the wall body through a bolt, one end of the threaded pull rod sleeved with the horizontal steel pipe is sleeved with a steel pipe gasket, and the steel pipe gasket is locked and abutted to one end of the horizontal steel pipe through the; the horizontal steel pipe is locked and abutted against one side of the wall body by bolts at two ends of the threaded pull rod in a matching manner with the wall body gasket and the steel pipe gasket, and the horizontal steel pipe is fixedly connected with the vertical rod through the fastener so as to fixedly connect the vertical rod on the wall body. 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.
Description
Technical Field
The invention is applied to the field of construction engineering construction, and particularly relates to 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 providing a scaffold wall connecting piece aiming at the defects of the prior art.
In order to solve the technical problems, the scaffold wall connecting piece is arranged between a wall body and a vertical rod and comprises a threaded pull rod, one end of the threaded pull rod penetrates through a preformed hole formed in the wall body, the other end of the threaded pull rod is sleeved with a horizontal steel pipe, one end of the threaded pull rod penetrating through the wall body is sleeved with a wall body gasket, the wall body gasket is locked and abutted to the surface of the wall body through a bolt, one end of the threaded pull rod sleeved with the horizontal steel pipe is sleeved with a steel pipe gasket, and the steel pipe gasket is locked and abutted to one end of the horizontal steel pipe through the bolt;
the horizontal steel pipe is locked and abutted against one side of the wall body by bolts at two ends of the threaded pull rod in cooperation with the wall body gasket and the steel pipe gasket, and the horizontal steel pipe is fixedly connected with the vertical rod through the fastener so as to fixedly connect the vertical rod to the wall body.
As a possible implementation manner, further, two ends of the horizontal steel pipe are respectively provided with a steel pipe gasket sleeved on the threaded pull rod, one of the steel pipe gaskets is pushed by the bolt to abut against one end of the horizontal steel pipe, and the other steel pipe gasket is abutted by the horizontal steel pipe to be clamped on the surface of the wall body.
As a possible implementation manner, further, the steel pipe gasket includes a gasket main body, a gasket sleeve penetrates through the center of the gasket main body, positioning grooves corresponding to the horizontal steel pipes are formed in the surface of the gasket main body, and when the steel pipe gasket abuts against the two ends of the horizontal steel pipes, the two ends of the horizontal steel pipes abut against the inside of the positioning grooves.
As a possible embodiment, further, the inner diameter of the spacer sleeve is equal to the maximum outer diameter of the threaded pull rod.
Preferably, the bolt is an M16 bolt, and when the bolt is tightened and locked, the distance between the bolt and the nearest end of the threaded pull rod is 5-10 cm.
As a possible implementation manner, further, a stabilizing sleeve is arranged in a preformed hole formed in the wall body, the stabilizing sleeve comprises a main sleeve and a sleeve cover pipe, a limiting convex plate is arranged at one end of the main sleeve, a connecting thread is arranged on the surface of the other end of the main sleeve, a limiting convex plate is arranged at one end of the sleeve cover pipe, a connecting internal thread corresponding to the connecting thread is arranged on the inner wall of the other end of the sleeve cover pipe, and the sleeve cover pipe is in rotary threaded connection with the main sleeve.
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. 1-10, the present invention provides a scaffold wall connecting member, which is disposed between a wall 100 and an upright rod 200, and includes 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 by 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 by 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.
Preferably, the bolt 4 is an M16 bolt, and when the bolt 4 is screwed tightly and locked, the distance between the bolt and the most proximal 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 element was further verified by finite element simulation analysis using MidasGen 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 (6)
1. The utility model provides a scaffold frame is wall spare even, sets up between wall body and pole setting, its characterized in that: the wall body comprises a threaded pull rod, wherein one end of the threaded pull rod penetrates through a preformed hole formed in a wall body, the other end of the threaded pull rod is sleeved with a horizontal steel pipe, one end of the threaded pull rod, which penetrates through the wall body, is sleeved with a wall body gasket, the wall body gasket is locked and abutted to the surface of the wall body through a bolt, one end of the threaded pull rod, which is sleeved with the horizontal steel pipe, is sleeved with a steel pipe gasket, and the steel pipe gasket is locked and abutted to one end of the;
the horizontal steel pipe is locked and abutted against one side of the wall body by bolts at two ends of the threaded pull rod in cooperation with the wall body gasket and the steel pipe gasket, and the horizontal steel pipe is fixedly connected with the vertical rod through the fastener so as to fixedly connect the vertical rod to the wall body.
2. A scaffolding wall element as claimed in claim 1, wherein: and two ends of the horizontal steel pipe are respectively provided with a steel pipe gasket sleeved on the threaded pull rod, one steel pipe gasket is pushed by the bolt to abut against one end of the horizontal steel pipe, and the other steel pipe gasket is abutted by the horizontal steel pipe to be clamped on the surface of the wall body.
3. A scaffolding wall element as claimed in claim 2, wherein: the steel pipe gasket comprises a gasket main body, a gasket sleeve penetrates through the center of the gasket main body, positioning grooves corresponding to the horizontal steel pipes are formed in the surface of the gasket main body, and when the steel pipe gasket is abutted to the two ends of the horizontal steel pipes, the two ends of the horizontal steel pipes are abutted to the positioning grooves correspondingly.
4. A scaffolding wall element as claimed in claim 3, wherein: the inner diameter of the gasket sleeve is equal to the maximum outer diameter of the threaded pull rod.
5. A scaffolding wall element as claimed in claim 1, wherein: the bolt is an M16 bolt, and when the bolt is screwed down and locked, the distance between the bolt and the nearest end of the threaded pull rod is 5-10 cm.
6. A scaffolding wall element as claimed in claim 1, wherein: the wall body is characterized in that a stabilizing external member is arranged in a preformed hole formed in the wall body and comprises a main sleeve and a sleeve cover pipe, wherein one end of the main sleeve is provided with a limiting convex plate, the surface of the other end of the main sleeve is provided with connecting threads, one end of the sleeve cover pipe is provided with the limiting convex plate, the inner wall of the other end of the sleeve cover pipe is provided with connecting internal threads corresponding to the connecting threads, and the sleeve cover pipe is in rotary threaded connection with the main sleeve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010856117.5A CN111851985A (en) | 2020-08-24 | 2020-08-24 | Scaffold wall connecting piece |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010856117.5A CN111851985A (en) | 2020-08-24 | 2020-08-24 | Scaffold wall connecting piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576028A (en) * | 2020-12-05 | 2021-03-30 | 中冶天工集团有限公司 | External scaffold fixing construction method |
| 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 |
-
2020
- 2020-08-24 CN CN202010856117.5A patent/CN111851985A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112576028A (en) * | 2020-12-05 | 2021-03-30 | 中冶天工集团有限公司 | External scaffold fixing construction method |
| 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 |
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