CN113719109A - Overhanging I-steel single-anchor buried construction method for external shear wall - Google Patents
Overhanging I-steel single-anchor buried construction method for external shear wall Download PDFInfo
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- CN113719109A CN113719109A CN202111037646.3A CN202111037646A CN113719109A CN 113719109 A CN113719109 A CN 113719109A CN 202111037646 A CN202111037646 A CN 202111037646A CN 113719109 A CN113719109 A CN 113719109A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 168
- 239000010959 steel Substances 0.000 title claims abstract description 168
- 238000010276 construction Methods 0.000 title claims abstract description 25
- 238000004873 anchoring Methods 0.000 claims abstract description 65
- 238000000034 method Methods 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000007547 defect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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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
-
- 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
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a construction method for single anchor hidden burying of overhanging I-steel of an outer shear wall, which is characterized in that a U-shaped anchor ring is pre-buried and fixed in an outer shear wall hidden column aiming at each overhanging I-steel, and after the U-shaped anchor ring is pre-buried through concrete, an anchoring section of the overhanging I-steel is inserted into an opening of the U-shaped anchor ring and then is pressed and fixed through section steel; when the I-shaped steel cantilever is detached, the I-shaped steel cantilever is cut off along the outer side line of the embedded column of the shear wall, so that the I-shaped steel cantilever can be recycled. The I-shaped steel is buried in the shear wall embedded column through the single U-shaped anchor ring, so that the workload of fixing the U-shaped anchor ring can be greatly reduced. Because the anchoring section of the I-steel does not extend into the room, the influence on the quality of the floor slab can be avoided, and the problem that the anchoring length of some I-steels is not enough when the I-steels are intensively arranged and the crossed situation occurs can also be avoided. No hole is reserved after the I-shaped steel is anchored, the repair work in the prior art is avoided, the workload is greatly reduced, and the leakage hidden trouble caused by repair can be avoided.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to a construction method for single-anchor buried construction of overhanging I-shaped steel of an external shear wall.
Background
During construction of a high-rise building, an overhanging scaffold needs to be erected outside the building, and the overhanging scaffold is supported by overhanging I-shaped steel extending out of the building.
The I-steel of encorbelmenting of scaffold frame of encorbelmenting is pre-buried has following defect at present:
1. the cantilever I-steel is anchored on the floor slab, the anchoring length needs to meet 1.25 times of the cantilever length, according to the standard requirement, the cantilever length of the I-steel is between 1.5m and 2.5, namely the vertical extension length is about 1.5m, the longest extension length of the I-steel can reach 2.5m according to different inclination angles, so that the shortest anchoring length of the I-steel on the floor slab is close to 1.9 m, and the longest length of the I-steel exceeds 3 m.
The anchoring mode is that a U-shaped anchor ring is pre-embedded when concrete is poured on the floor slab, generally, a U-shaped anchor ring is pre-embedded at the edge of the floor slab near an I-shaped steel anchoring section, and two anchor rings are anchored at the end of the anchoring section. Namely, one I-steel needs to be fixed by embedding three U-shaped anchor rings.
And at building external corner department, the quantity of I-steel of encorbelmenting is more, and the slope is arranged for mostly moreover, and avoids the anchor section alternately, so there is the hidden danger that I-steel anchor length is not enough that probably has, in addition, corresponds the regional pre-buried U type anchor ring quantity in corner on the floor many, leads to the load to concentrate in the scaffold frame use of encorbelmenting, easily leads to the phenomenon of this regional floor fracture.
2. Because the I-steel that encorbelments is fixed through the pre-buried U type anchor ring of floor, so need when the shear force wall is pour I-steel stretching out position department reserve the entrance to a cave, reserve the entrance to a cave and repair after the I-steel that encorbelments is demolishd, repair work load is big, the condition of repair not in place easily appears, has the hidden danger of seepage.
When the I-steel is dismantled, the built-in ring in the building and the I-steel are cut off, so that short I-steel extending out of the building cannot be recycled, and material and labor are seriously wasted.
3. If the situation of the penetration degree is met, the pre-buried cantilever I-shaped steel is too early, the concrete strength at the pre-buried ring at the end part of the pre-buried cantilever I-shaped steel does not meet the requirement, the floor slab is easy to crack and seep, and the life and the enterprise image of residents are greatly influenced;
4. under the influence of the large environment of the current house, the construction period of the project is basically short, and if the pre-buried overhanging I-shaped steel exists at the positions of the drainage pipeline of the toilet and the flue of the kitchen, the insertion of the working procedures of the drainage pipeline and the flue can be influenced, so that the progress arrangement of the project is adversely affected. In addition, the area of the toilet is small, the partition walls are large, the partition walls are built after the I-shaped steel is fixed, and even the situation that the I-shaped steel is located at the partition walls can occur.
In conclusion, the existing cantilever I-shaped steel anchoring at the building external corner, the toilet and the kitchen is easy to have the defect of influencing the building quality.
Disclosure of Invention
The invention aims to provide a construction method for single-anchor buried construction of overhanging I-steel for an external shear wall at an external corner of a building, a toilet and a kitchen, which improves the turnover rate of the overhanging I-steel and avoids influencing the quality of a floor slab at an embedded anchor ring at the anchoring end part of the overhanging I-steel.
The invention provides a construction method for single-anchor buried construction of overhanging I-beams of an outer shear wall, which is characterized in that a U-shaped anchor ring is pre-buried and fixed in a buried column of the outer shear wall aiming at each overhanging I-beam, and after the U-shaped anchor ring is pre-buried through concrete, an anchoring section of the overhanging I-beam is inserted into an opening of the U-shaped anchor ring and then is pressed and fixed through section steel; when the I-shaped steel cantilever is detached, the I-shaped steel cantilever is cut off along the outer side line of the embedded column of the shear wall, so that the I-shaped steel cantilever can be recycled.
In one embodiment of the method, the outer end sections of the two side arms of the U-shaped anchor ring are threaded sections.
In one embodiment of the method, the U-shaped anchor ring is embedded and fixed after the reinforcement of the overhanging I-shaped steel laying layer is bound and before concrete is poured.
In one embodiment of the method, when the U-shaped anchor ring is fixed, an inverted U-shaped reinforcing rib is fixed at the bottom of the U-shaped anchor ring, and the two side arms of the U-shaped anchor ring are welded and fixed with the shear wall hidden column reinforcing steel bars around the U-shaped anchor ring through the reinforcing steel bars.
In one embodiment of the method, after the anchoring section of the cantilever I-shaped steel is inserted into the opening of the U-shaped anchor ring, the cantilever I-shaped steel is locked by the section steel penetrating through the two side arms of the U-shaped anchor ring and the high-strength nut, and the section steel and the anchoring section are welded and fixed.
In one embodiment of the method, the length of the cantilever I-steel anchored into the shear wall embedded column is not less than 100mm, and the distance between the end part of the anchoring end and the inner side line of the shear wall embedded column is not less than 40 mm.
The construction method for the single-anchor buried construction of the overhanging I-steel of the outer shear wall comprises the following steps:
(1) preparation work
Determining the number of the I-beams to be cantilevered according to a layout drawing of the I-beams to be cantilevered, preparing the I-beams with the length of 1.5-2.5m, preparing section steels with the same number as the I-beams to be cantilevered according to the opening width of the U-shaped anchor ring, symmetrically processing mounting holes matched with the side arm of the U-shaped anchor ring in size at two ends of the section steels, and configuring four times of high-strength nuts for the U-shaped anchor ring;
(2) an inverted U-shaped reinforcing rib is fixed at the bottom of the U-shaped anchor ring;
(3) placing the U-shaped anchor ring at a designated position, and welding and fixing the U-shaped anchor ring with the shear wall embedded column reinforcing steel bars;
(4) concrete pouring is carried out on the cantilever I-shaped steel laying layer, so that the U-shaped anchor ring is anchored, and the opening end section of the U-shaped anchor ring extends out of the concrete by a specified length;
(5) after the concrete is finally set, inserting the anchoring section of the cantilever I-shaped steel into the opening of the extending section of the U-shaped anchor ring according to the design requirement and pressing and fixing the cantilever I-shaped steel by the section steel;
(6) and pouring the concrete on the upper layer of the cantilever I-shaped steel laying layer, and pouring the anchoring section of the cantilever I-shaped steel into the embedded column of the concrete shear wall.
(7) Dismantling of overhanging I-steel
And cutting off the cantilever I-shaped steel along the outer side line of the hidden column of the shear wall, leaving the anchoring section and the U-shaped anchor ring in the concrete wall body, and performing anti-rust treatment on the exposed area.
In the invention, only one U-shaped anchor ring needs to be fixed in the shear wall embedded column for anchoring one cantilever I-shaped steel, the U-shaped anchor ring is anchored by concrete of the cantilever I-shaped steel laying layer, and after the anchoring section of the I-shaped steel is fixed with the U-shaped anchor ring and the section steel, the anchoring section is poured in the concrete shear wall embedded column when the concrete of the upper layer of the shear wall is poured. Although the anchoring length of the I-shaped steel is short, the anchoring section and the U-shaped anchor ring are pressed by the upper concrete shear wall, so that the cantilever stress performance of the I-shaped steel is completely guaranteed. Because the anchoring section of the I-steel is short, the I-steel has small length loss after being cut along the outer side line of the embedded column of the shear wall, can be recycled and has less material waste. And the hidden column of the outer shear wall does not need to be repaired after the I-steel is cut off, and the cut can be subjected to rust-proof treatment, so that the defect that the hole needs to be repaired in the prior art is overcome. In short, the I-shaped steel is buried in the shear wall embedded column through the single U-shaped anchor ring, so that the fixing workload of the U-shaped anchor ring can be greatly reduced. Because the anchoring section of the I-steel does not extend into the room, the influence on the quality of the floor slab can be avoided, and the problem that the anchoring length of some I-steels is not enough when the I-steels are intensively arranged and the crossed situation occurs can also be avoided. No hole is reserved after the I-shaped steel is anchored, the repair work in the prior art is avoided, the workload is greatly reduced, and the leakage hidden trouble caused by repair can be avoided.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention showing the anchoring of cantilever i-beams (the reinforcing ribs of the U-shaped anchor ring are not shown).
Fig. 2 is an enlarged schematic view of a portion a of the drawing.
Fig. 3 is an enlarged schematic view of B-B in fig. 2.
Fig. 4 is a schematic plan view of the anchoring of the overhanging i-steel at the external corner (anchoring members such as U-shaped anchor rings are not shown).
FIG. 5 is a schematic view of the anchoring of the overhanging I-beam in the toilet when the drainage pipe is exposed (the anchoring members such as U-shaped anchoring ring are not shown).
Detailed Description
As shown in fig. 1 to 5, the invention discloses a single-anchor buried construction method for overhanging i-steel of an external shear wall, which is mainly used for anchoring overhanging i-steel of concrete shear wall buried columns at positions of floor external corners, toilet drainage pipelines, kitchen flues and the like and matched with conventional anchoring modes of overhanging i-steel at other positions. The key point of the method is the pre-embedding and fixing of the U-shaped anchor ring and the laying and fixing of the overhanging I-shaped steel.
The single-root overhanging I-shaped steel anchoring mode in the method is as follows: a U-shaped anchor ring is pre-buried and fixed in the hidden column of the outer shear wall, after the U-shaped anchor ring is poured through concrete, the anchoring section of the overhanging I-shaped steel is inserted into an opening of the U-shaped anchor ring and then is pressed and fixed through the section steel, and then the anchoring section of the overhanging I-shaped steel is poured in the hidden column of the concrete shear wall through the next layer of concrete pouring.
The U-shaped anchor ring 1 is made of round steel, and threads with specified lengths are respectively machined at two end sections of the U-shaped anchor ring before bending and forming.
In order to ensure the anchoring strength of the U-shaped anchor ring, a plurality of inverted U-shaped reinforcing ribs 2 are buckled at the bottom of the U-shaped anchor ring.
In order to further ensure the anchoring strength of the U-shaped anchor ring, the U-shaped anchor ring and the surrounding shear wall hidden column steel bars are welded together by adopting the steel bars on two sides of the U-shaped anchor ring.
The purpose of ensuring the anchoring strength of the U-shaped anchor ring is to ensure the anchoring strength of the overhanging I-shaped steel.
In order to ensure the bearing performance of the cantilever I-shaped steel during use, the length of the cantilever I-shaped steel anchored into the shear wall embedded column is not less than 100 mm.
In order to ensure that the overhanging I-shaped steel does not penetrate through the shear wall and reduce the leakage risk, the distance between the end part of the anchoring end of the overhanging I-shaped steel and the inner edge line of the hidden column of the shear wall is not less than 40 mm.
The anchoring end of the cantilever I-shaped steel is inserted into the opening of the U-shaped anchor ring for a specified length and then stretches across a piece of section steel on the upper surface of the cantilever I-shaped steel, and the two ends of the section steel penetrate through the two side arms of the U-shaped anchor ring and are locked by the double high-strength nuts.
In order to prevent the overhanging I-shaped steel from slipping in the using process, the section steel and the overhanging I-shaped steel are welded.
The following detailed description of the specific embodiments of the present invention:
(1) material processing
According to the cantilever I-steel layout drawing of the construction scheme, the waste I-steel with the length less than 3m, which is generated in the early-stage cantilever frame dismantling process of the project, is processed, and the two ends are cut flat, so that the length of the waste I-steel is between 1.5m and 2.5 m.
(2) U-shaped anchor ring pre-embedding
After the reinforcement of the overhanging I-shaped steel laying layer is bound, the U-shaped anchor ring 1 is pre-embedded at the position determined by the construction scheme.
The bottom of the U-shaped anchor ring 1 uses three C18 twisted steel bars as reinforcing ribs 2, the reinforcing ribs are processed into a U shape and are reversely buckled at the bottom of the U-shaped anchor ring.
In order to facilitate the positioning of the reinforcing rib on the U-shaped anchor ring, a positioning piece (not shown in the figure) can be vertically welded at the bottom of the U-shaped anchor ring, one side arm of the reinforcing rib is arranged in an included angle between the positioning piece and the U-shaped anchor ring in a spanning mode, and then the reinforcing rib and the U-shaped anchor ring are bound and fixed.
And welding the U-shaped anchor ring and the surrounding shear wall hidden column reinforcing steel bars 4 together at two sides of the U-shaped anchor ring through C14 reinforcing steel bars 3.
And finally, pouring concrete of the overhanging I-shaped steel laying layer to anchor the lower part of the U-shaped anchor ring in the concrete.
(3) Overhanging I-steel laying
After concrete is finally set, the overhanging I-shaped steel is laid, the anchoring end of the overhanging I-shaped steel is inserted into the opening of the U-shaped anchor ring for a specified length (the length of the I-shaped steel anchored into the embedded column of the shear wall is not less than 100mm, and the distance between the end part of the anchoring end and the inner side line of the embedded column of the shear wall is not less than 40 mm), an angle steel 5 stretches across the upper surface of the overhanging I-shaped steel, two ends of the angle steel penetrate through side arms of the U-shaped anchor ring, then the angle steel is tightly pressed between the concrete and the angle steel by using a high-strength nut, and the angle steel and the I-shaped steel are welded and fixed. The specification of the angle steel can be selected from L63 × 6.
(4) I-steel anchor encorbelments
And pouring the next layer of concrete, and pouring the anchoring section of the cantilever I-shaped steel into the embedded column of the concrete shear wall.
(5) Dismantling of overhanging I-steel
When the overhanging scaffold is dismantled, the overhanging I-steel is cut off along the outer side line of the shear wall column, the internal anchoring section and the U-shaped anchoring ring of the shear wall are left inside the concrete wall, and the exposed area is subjected to rust prevention treatment.
As can be seen from figure 3, the arrangement of the overhanging I-beams at the external corner can not be crossed due to the short anchoring length of the I-beams.
As can be seen from FIG. 5, the anchoring of the I-steel does not affect the construction of the pipeline at the toilet.
From the anchoring structure and the construction process, the cantilever I-shaped steel is buried in the shear wall column in a single anchor mode, and compared with the mode that multiple anchors are arranged on a floor slab in the prior art, the cantilever I-shaped steel has the following advantages:
the anchoring of one cantilever I-shaped steel only needs to fix one U-shaped anchor ring in the shear wall column, so that the workload of fixing the U-shaped anchor ring can be greatly reduced. The U-shaped anchor ring is anchored by the concrete of the overhanging I-shaped steel laying layer, after the anchoring section of the I-shaped steel is fixed with the U-shaped anchor ring and the section steel, the anchoring section is poured in the embedded column of the concrete shear wall when the concrete of the upper layer is poured. Although the anchoring length of the I-shaped steel is short, the anchoring section and the U-shaped anchor ring are pressed by the upper concrete shear wall, so that the cantilever stress performance of the I-shaped steel is completely guaranteed.
The anchoring section of the I-steel does not extend into the room, so that the influence on the quality of the floor slab can be avoided, and the problem that the anchoring length of some I-steels is not enough when the I-steels are intensively arranged and the crossed situation occurs can also be avoided.
Due to the fact that the anchoring length of the I-shaped steel is short, after the I-shaped steel is cut along the outer side line of the embedded column of the shear wall, the length loss of the I-shaped steel is small, the I-shaped steel can be used in a circulating mode, and material waste is little.
The outer shear wall does not need to be repaired after the I-steel is cut off, and the cut can be subjected to rust prevention treatment, so that the defect that the hole needs to be repaired in the prior art is overcome.
Claims (7)
1. The utility model provides an I-steel single anchor buried construction method that encorbelments of outer shear wall which characterized in that: the method comprises the steps that a U-shaped anchor ring is pre-embedded and fixed in an outer shear wall embedded column aiming at each overhanging I-shaped steel, and after the U-shaped anchor ring is pre-embedded through concrete, an anchoring section of the overhanging I-shaped steel is inserted into an opening of the U-shaped anchor ring and then is pressed and fixed through section steel; when the I-shaped steel cantilever is detached, the I-shaped steel cantilever is cut off along the outer side line of the embedded column of the shear wall, so that the I-shaped steel cantilever can be recycled.
2. The single-anchor buried construction method of the overhanging i-steel of the outer shear wall according to claim 1, characterized in that: the outer end sections of the two side arms of the U-shaped anchor ring are threaded sections.
3. The single-anchor buried construction method of the overhanging i-steel of the outer shear wall according to claim 1, characterized in that: and the U-shaped anchor ring is pre-embedded and fixed after the reinforcement of the overhanging I-shaped steel laying layer is bound and before concrete is poured.
4. The single-anchor buried construction method of the overhanging i-steel of the outer shear wall according to claim 1, characterized in that: when the U-shaped anchor ring is fixed, the bottom of the U-shaped anchor ring is fixed with an inverted U-shaped reinforcing rib, and the two side arms of the U-shaped anchor ring are welded and fixed with the shear wall hidden column reinforcing steel bars around the U-shaped anchor ring through the reinforcing steel bars.
5. The single-anchor buried construction method of the overhanging i-steel of the outer shear wall according to claim 2, characterized in that: after the anchoring section of the cantilever I-shaped steel is inserted into the opening of the U-shaped anchor ring, the cantilever I-shaped steel is locked by the section steel penetrating through the two side arms of the U-shaped anchor ring and the high-strength nut, and the section steel and the anchoring section are welded and fixed.
6. The single-anchor buried construction method of the overhanging i-steel of the outer shear wall according to claim 1, characterized in that: the length of the cantilever I-shaped steel anchored in the shear wall embedded column is not less than 100mm, and the distance between the end part of the anchoring end and the inner side line of the shear wall embedded column is not less than 40 mm.
7. The single-anchor buried construction method of overhanging i-steel of the outer shear wall as claimed in claims 1-6, comprising the steps of:
(1) preparation work
Determining the number of the I-beams to be cantilevered according to a layout drawing of the I-beams to be cantilevered, preparing the I-beams with the length of 1.5-2.5m, preparing section steels with the same number as the I-beams to be cantilevered according to the opening width of the U-shaped anchor ring, symmetrically processing mounting holes matched with the side arm of the U-shaped anchor ring in size at two ends of the section steels, and configuring four times of high-strength nuts for the U-shaped anchor ring;
(2) an inverted U-shaped reinforcing rib is fixed at the bottom of the U-shaped anchor ring;
(3) placing the U-shaped anchor ring at a designated position, and welding and fixing the U-shaped anchor ring with the shear wall embedded column reinforcing steel bars;
(4) concrete pouring is carried out on the cantilever I-shaped steel laying layer, so that the U-shaped anchor ring is anchored, and the opening end section of the U-shaped anchor ring extends out of the concrete by a specified length;
(5) after the concrete is finally set, inserting the anchoring section of the cantilever I-shaped steel into the opening of the extending section of the U-shaped anchor ring according to the design requirement and pressing and fixing the cantilever I-shaped steel by the section steel;
(6) and pouring the concrete on the upper layer of the cantilever I-shaped steel laying layer, and pouring the anchoring section of the cantilever I-shaped steel into the embedded column of the concrete shear wall.
(7) Dismantling of overhanging I-steel
And cutting off the cantilever I-shaped steel along the outer side line of the hidden column of the shear wall, leaving the anchoring section and the U-shaped anchor ring in the concrete wall body, and performing anti-rust treatment on the exposed area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111037646.3A CN113719109A (en) | 2021-09-06 | 2021-09-06 | Overhanging I-steel single-anchor buried construction method for external shear wall |
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| CN202111037646.3A CN113719109A (en) | 2021-09-06 | 2021-09-06 | Overhanging I-steel single-anchor buried construction method for external shear wall |
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