CN113638546B - Construction method for autoclaved aerated concrete slab wrapped by box-type steel columns - Google Patents
Construction method for autoclaved aerated concrete slab wrapped by box-type steel columns Download PDFInfo
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- CN113638546B CN113638546B CN202111024004.XA CN202111024004A CN113638546B CN 113638546 B CN113638546 B CN 113638546B CN 202111024004 A CN202111024004 A CN 202111024004A CN 113638546 B CN113638546 B CN 113638546B
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- 239000004567 concrete Substances 0.000 title claims abstract description 131
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 95
- 239000010959 steel Substances 0.000 title claims abstract description 95
- 238000010276 construction Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 239000004570 mortar (masonry) Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000011178 precast concrete Substances 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000005253 cladding Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012946 outsourcing Methods 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- 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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a construction method for a box-type steel column to be externally covered with autoclaved aerated concrete plates, which adopts autoclaved aerated concrete plates to replace concrete to cover the box-type steel column, and utilizes a self-locking construction method of a mortise-tenon structure to effectively solve the problems of complicated construction procedures, long construction period, large labor and material investment, long construction period, high cost and the like of the traditional cast-in-situ concrete covered box-type steel column, reduce the dosage of a large amount of concrete and steel bars, simultaneously avoid the construction procedures of die stripping, maintenance and the like of the subsequent precast concrete plates, realize one-step molding, and greatly shorten the construction period.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for a box steel column outsourcing autoclaved aerated concrete slab.
Background
Currently, in house construction engineering, the application range of steel structures is developing from high-rise heavy and space large-span industries to public building steel structures and houses. Because the steel has the defect of poor fire resistance, in the steel structure construction process, in order to exert the advantages of high strength, light weight, good shock resistance and the like of the steel, and avoid the influence of the defect of poor fire resistance and the like on the structural safety, fireproof measures are needed to be adopted to ensure that each steel structure member meets the fire resistance requirement. The conventional fireproof measure of the box steel column is that the box steel column is poured with a certain amount of concrete around, namely, the time for the steel column to meet the fireproof limit is realized through the concrete with a certain thickness. The construction method is simple, the materials are easy to obtain, but the required working procedures are complicated, the steel bars, the support templates, the pouring, the maintenance and the like are required to be bound, the period is long, the use input amount of manpower and materials is large, the construction period is influenced, and the cost is high.
Disclosure of Invention
In view of the above, the invention provides a construction method for wrapping autoclaved aerated concrete slabs outside box-type steel columns, which adopts autoclaved aerated concrete slabs to replace concrete to wrap the box-type steel columns, can reduce the dosage of a large amount of concrete and reinforcing steel bars, simultaneously omits construction procedures such as demolding, maintenance and the like of the subsequent precast concrete slabs, can be molded at one time, and greatly shortens the construction period.
The construction method of the autoclaved aerated concrete slab wrapped by the box steel column specifically comprises the following steps:
s1, determining the installation position of an autoclaved aerated concrete slab according to the axis of a box steel column;
s2, selecting the model of the autoclaved aerated concrete slab according to the fireproof requirement of the box steel column;
s3, forming a plurality of first mounting holes on the plate surfaces of three autoclaved aerated concrete plates, and forming a plurality of second mounting holes on the plate surfaces of the other autoclaved aerated concrete plates;
s4, installing three autoclaved aerated concrete slabs with first installation holes on the side surfaces of the box steel columns through hook head bolts respectively, and welding and fixing the hook head bolts and the side surfaces of the box steel columns;
s5, installing the autoclaved aerated concrete slab with the second installation hole on the closed side surface of the box-type steel column through a hook bolt;
s6, blocking vertical joints between adjacent autoclaved aerated concrete slabs;
s7, reinforcing the autoclaved aerated concrete slab by using pins;
s8, repairing the autoclaved aerated concrete slab.
Preferably, in the step S4, the specific steps of installing three autoclaved aerated concrete slabs with first installation holes on the side surfaces of the box steel columns through hook bolts respectively are as follows:
hoisting one autoclaved aerated concrete slab provided with a first mounting hole on any mounting position of a box steel column, inserting a hook bolt into the first mounting hole to enable a hook of the hook bolt to prop against the side surface of the box steel column, wherein a gap exists between the autoclaved aerated concrete slab and the box steel column; then, a welding rod is stretched into the space between the autoclaved aerated concrete slab and the box steel column from the side edge of the gap so as to weld the hook head of the hook head bolt and the box steel column into a whole;
repeating the steps, and sequentially installing other two autoclaved aerated concrete plates with first installing holes on the corresponding side surfaces of the box steel columns.
Preferably, in the step S5, the specific steps of installing the autoclaved aerated concrete slab provided with the second installation hole on the closed side surface of the box steel column through the hook bolt are as follows:
hoisting the autoclaved aerated concrete slab provided with the second mounting hole on the mounting position of the closed surface of the box steel column;
then, inserting a hook bolt into the second mounting hole to enable the hook of the hook bolt to prop against the side surface of the box-type steel column, wherein a gap exists between the autoclaved aerated concrete slab and the box-type steel column;
and finally, the welding rod stretches into the space between the screw rod of the hook bolt and the second mounting hole and between the autoclaved aerated concrete slab and the box steel column so as to weld the hook head of the hook bolt and the box steel column into a whole.
Preferably, the specific step of plugging the vertical joint between the adjacent autoclaved aerated concrete slabs in the step S6 is as follows:
cleaning vertical joints between two adjacent autoclaved aerated concrete slabs;
respectively smearing a caulking agent on two opposite plate surfaces;
the PE rod is plugged in the vertical joint;
uniformly driving sealant into the vertical seams;
and finally, sealing and filling up the vertical joints by using mortar.
Preferably, the filling thickness of the mortar is not less than 2cm.
Preferably, the fire-proof grade of the autoclaved aerated concrete slab is not less than the fire-proof requirement of the box steel column.
Preferably, the size of the first mounting hole is smaller than the size of the second mounting hole.
Preferably, the first mounting hole is a circular hole, the second mounting hole is a rectangular hole, and the diameter of the first mounting hole and the width of the second mounting hole are both larger than the diameter of the stud of the hook bolt.
The beneficial effects of the invention are as follows:
1. the invention adopts autoclaved aerated concrete slab to replace concrete cladding box steel column, and utilizes self-locking construction method of mortise and tenon structure, which effectively solves the problems of complicated construction procedure, long construction period, large labor and material investment, long construction period, high cost and the like of traditional cast-in-situ concrete cladding box steel column, can reduce the dosage of a large amount of concrete and reinforcing steel bars, simultaneously omits construction procedures of mold stripping, maintenance and the like of the subsequent precast concrete slab, can realize one-step molding, greatly shortens the construction period, and shortens the construction period by nearly 1/2.
2. The autoclaved aerated concrete slab adopted by the invention is smooth, has good appearance of finished products, does not have subsequent concrete curing steps, saves cost and labor force, and accelerates the construction period progress.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of an autoclaved aerated concrete slab provided with a first mounting hole.
Fig. 2 is a schematic view of an autoclaved aerated concrete slab provided with a second mounting hole.
Fig. 3 is a top view of the autoclaved aerated concrete slab cladding completed.
Fig. 4 is a side view of the completed cladding of an autoclaved aerated concrete slab.
The meaning of the reference numerals in the figures is:
1 is a box steel column, 2 is an autoclaved aerated concrete slab, 3 is a hook bolt, 4 is a vertical seam, 5 is a pin, 6 is a first mounting hole, 7 is a second mounting hole, and 8 is an L-shaped pipe clamp.
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The present application is described in further detail below by way of specific embodiments and with reference to the accompanying drawings.
In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" means two or more, unless specified or indicated otherwise; the terms "coupled," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, it should be understood that the terms "upper," "lower," "left," "right," and the like in the embodiments of the present application are described in terms of angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
The invention provides a construction method for a box-type steel column outsourcing autoclaved aerated concrete slab, which specifically comprises the following steps:
s1, determining the installation position of the autoclaved aerated concrete slab 2 according to the axis of the box steel column 1.
S2, selecting the model of the autoclaved aerated concrete slab 2 according to the fireproof requirement of the box steel column 1.
The fire-proof grade of the autoclaved aerated concrete slab 2 is not less than the fire-proof requirement of the box steel column 1, and the fire-proof grade of the autoclaved aerated concrete slab 2 is mainly determined by the thickness of the slabs.
In the embodiment, the plate volume weight of the autoclaved aerated concrete plate 2 is 6.25KN/m 3 The size is: the autoclaved aerated concrete slab 2 is a precast slab with a length of 3000mm by 600mm by 100 mm.
S3, a plurality of first mounting holes 6 are formed in the plate surfaces of three autoclaved aerated concrete plates 2, a plurality of second mounting holes 7 are formed in the plate surfaces of the other autoclaved aerated concrete plates, the autoclaved aerated concrete plates with the second mounting holes are finally mounted as a closed panel, and the size of the first mounting holes 6 is smaller than that of the second mounting holes 7.
In this embodiment, the first mounting hole 6 is a circular hole, the second mounting hole 7 is a rectangular hole, the diameter of the first mounting hole 6 and the width of the second mounting hole 7 are both larger than the diameter of the stud of the hook bolt 3, and the length of the second mounting hole 7 is about 5 cm to 8cm so as to facilitate the welding of the hook bolt 3 on the autoclaved aerated concrete slab 2 located at the closed position.
Two mounting holes are respectively formed in the four autoclaved aerated concrete plates 2, specifically, the mounting holes are formed in positions 30cm away from the upper edge of the plate surface, and the two mounting holes are symmetrically arranged with the axis of the box-type steel column 1 as the center and are about 10cm away from the side edge (left edge and right edge) of the plate surface.
When the first mounting holes 6 or the second mounting holes 7 are formed, a reaming bit is adopted for punching, and the reaming part in each mounting hole is about 25-30 mm deep.
S4, installing three autoclaved aerated concrete slabs with first installation holes 6 on the side surfaces of the box steel columns 1 through the hook bolts 3, and fixing the hook bolts 3 and the side surfaces of the box steel columns 1 in a welding mode.
Specifically, one autoclaved aerated concrete slab 2 provided with a first mounting hole 6 is hoisted and placed on any mounting position of the box steel column 1, a hook bolt 3 is inserted into the first mounting hole 6 to enable the hook head of the hook bolt 3 to be propped against the side surface of the box steel column 1 (the diameter of the first mounting hole 6 is slightly larger than the stud diameter of the hook bolt 3), and a gap exists between the autoclaved aerated concrete slab 2 and the box steel column 1; then, a welding rod is stretched into the space between the autoclaved aerated concrete slab 2 and the box steel column 1 from the side edge of the gap so as to weld the hook head of the hook head bolt 3 and the box steel column 1 into a whole;
repeating the steps, and sequentially installing the other two autoclaved aerated concrete plates 2 with the first installing holes 6 on the corresponding side surfaces of the box steel column 1.
After the hook head of each hook head bolt 3 is welded with the box steel column 1 into a whole, the hook head is immediately locked, the perpendicularity of the autoclaved aerated concrete slab 2 is dynamically monitored in the process of screwing up the nuts, and if the perpendicularity of the autoclaved aerated concrete slab 2 exceeds an error, the bolts are required to be loosened for correction, and the nuts can be screwed up until the requirements are met.
The four autoclaved aerated concrete plates are hoisted to a preset position according to the axis position, wherein a small round hole is formed in the bottom of each autoclaved aerated concrete plate, an L-shaped pipe clamp 8 is anchored into the bottom of each autoclaved aerated concrete plate, the L-shaped pipe clamp 8 is used for fixing the autoclaved aerated concrete plates, the L-shaped pipe clamp is fixed at a position 80mm away from the edge of the lower end plate of each autoclaved aerated concrete plate, the L-shaped pipe clamp is made of a galvanized steel plate with the thickness of 3.0mm, and the pipe sleeve is 0.8mm.
S5, installing the autoclaved aerated concrete slab provided with the second installation holes 7 on the closed side surface of the box steel column 1 through the hook bolt 3.
Specifically, firstly, hoisting and placing the autoclaved aerated concrete slab provided with the second mounting hole 7 at the closed position of the box steel column 1; then, inserting a hook bolt into the second mounting hole 7 to enable the hook of the hook bolt to be abutted against the side surface of the box steel column 1, wherein a gap is also formed between the autoclaved aerated concrete slab and the box steel column 1; because this autoclaved aerated concrete slab and the three autoclaved aerated concrete slabs already installed in the step S4 enclose a closed rectangular frame, the welding rod cannot extend between the autoclaved aerated concrete slab and the box steel column 1 from the side of the gap as in the step S4, and therefore, the welding rod needs to extend between the autoclaved aerated concrete slab and the box steel column 1 from the gap between the screw of the hook bolt 3 and the second mounting hole 7 (because the second mounting hole 7 is a rectangular hole, the width of the second mounting hole 7 is larger than the diameter of the stud of the hook bolt 3), so that the hook of the hook bolt 3 and the box steel column 1 are welded into a whole.
After the hook head of each hook head bolt 3 is welded with the box steel column 1 into a whole, the hook head is immediately locked, the perpendicularity of the autoclaved aerated concrete slab is dynamically monitored in the process of screwing up the nuts, and if the perpendicularity of the autoclaved aerated concrete slab exceeds an error, the bolts are required to be loosened for correction, and the nuts can be screwed up until the requirements are met.
S6, sealing the vertical joints 4 between the adjacent autoclaved aerated concrete slabs.
Specifically, firstly, cleaning the vertical joint 4 between two adjacent autoclaved aerated concrete slabs; respectively smearing a caulking agent on the two opposite plate surfaces; then, the PE rod is plugged in the vertical joint 4; then evenly pumping a proper amount of sealant into the vertical seams 4; finally, the vertical seam 4 is blocked and filled with mortar.
In this embodiment, the filling thickness of the mortar is not less than 2cm.
So far, the autoclaved aerated concrete slab coated on the periphery of the box steel column 1 is installed.
If one layer of autoclaved aerated concrete slab cannot completely cover the box steel column 1, a plurality of layers of autoclaved aerated concrete slabs are accumulated on the first layer of autoclaved aerated concrete slab according to the steps S3-S6, the upper layer of autoclaved aerated concrete slab and the lower layer of autoclaved aerated concrete slab are connected through 5-10mm mortar, and when the upper layer of autoclaved aerated concrete slab is installed, the mortar smeared on the upper end face of the lower layer of autoclaved aerated concrete slab is compacted by utilizing the dead weight of the upper layer of autoclaved aerated concrete slab.
S7, reinforcing the autoclaved aerated concrete plates 2 by using the pins 5, and combining adjacent autoclaved aerated concrete plates in pairs, so that all autoclaved aerated concrete plates form an integral stress frame.
S8, repairing the autoclaved aerated concrete slab.
Specifically, each of the first mounting hole 6 and the second mounting hole 7 needs to be repaired with mortar and painted to be flush with the panel surface of the autoclaved aerated concrete panel.
A gap of about 2cm exists between the autoclaved aerated concrete slab and the top steel beam, so that a special caulking agent is needed to repair the gap of 2cm so as to fully fill the gap.
After the autoclaved aerated concrete slab is repaired, the pipe clamp is fixed on the bottom plate by utilizing the anchor bolts.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (8)
1. The construction method of the autoclaved aerated concrete slab wrapped by the box-type steel column is characterized by comprising the following steps of:
s1, determining the installation position of an autoclaved aerated concrete slab according to the axis of a box steel column;
s2, selecting the model of the autoclaved aerated concrete slab according to the fireproof requirement of the box steel column;
s3, forming a plurality of first mounting holes on the plate surfaces of three autoclaved aerated concrete plates, and forming a plurality of second mounting holes on the plate surfaces of the other autoclaved aerated concrete plates;
s4, installing three autoclaved aerated concrete slabs with first installation holes on the side surfaces of the box steel columns through hook head bolts respectively, and welding and fixing the hook head bolts and the side surfaces of the box steel columns;
s5, installing the autoclaved aerated concrete slab with the second installation hole at the closed position of the box steel column through a hook bolt;
gaps are formed between the autoclaved aerated concrete slabs positioned at the front, the back, the left and the right and the corresponding side surfaces of the steel columns;
s6, blocking vertical joints between adjacent autoclaved aerated concrete slabs;
s7, reinforcing the autoclaved aerated concrete slab by using pins;
s8, repairing the autoclaved aerated concrete slab.
2. The construction method of the autoclaved aerated concrete slab outsourced by the box steel column according to claim 1, wherein in the step S4, three autoclaved aerated concrete slabs provided with first mounting holes are mounted on the side surface of the box steel column through hook bolts respectively, and the construction method is characterized by comprising the following concrete steps:
hoisting one autoclaved aerated concrete slab provided with a first mounting hole on any mounting position of a box steel column, inserting a hook bolt into the first mounting hole to enable a hook of the hook bolt to prop against the side surface of the box steel column, wherein a gap exists between the autoclaved aerated concrete slab and the box steel column; then, a welding rod is stretched into the space between the autoclaved aerated concrete slab and the box steel column from the side edge of the gap so as to weld the hook head of the hook head bolt and the box steel column into a whole;
repeating the steps, and sequentially installing other two autoclaved aerated concrete plates with first installing holes on the corresponding side surfaces of the box steel columns.
3. The construction method of the autoclaved aerated concrete slab encased by the box steel column as claimed in claim 1, wherein the concrete steps of installing the autoclaved aerated concrete slab provided with the second installation hole on the closed side surface of the box steel column through the hook bolt in the step S5 are as follows:
hoisting the autoclaved aerated concrete slab provided with the second mounting hole at the closed position of the box steel column; then, inserting a hook bolt into the second mounting hole to enable the hook of the hook bolt to prop against the side surface of the box-type steel column, wherein a gap exists between the autoclaved aerated concrete slab and the box-type steel column;
and finally, the welding rod stretches into the space between the screw rod of the hook bolt and the second mounting hole and between the autoclaved aerated concrete slab and the box steel column so as to weld the hook head of the hook bolt and the box steel column into a whole.
4. The construction method of the box-type steel column-encased autoclaved aerated concrete slab according to claim 1, wherein the concrete steps of plugging the vertical joints between the adjacent autoclaved aerated concrete slabs in the step S6 are as follows:
cleaning vertical joints between two adjacent autoclaved aerated concrete slabs;
respectively smearing a caulking agent on two opposite plate surfaces;
the PE rod is plugged in the vertical joint;
uniformly driving sealant into the vertical seams;
and finally, sealing and filling up the vertical joints by using mortar.
5. The construction method of the autoclaved aerated concrete slab encased by the box-type steel column as claimed in claim 4, wherein the filling thickness of the mortar is not less than 2cm.
6. The construction method for the autoclaved aerated concrete slab outsourced by the box steel column according to claim 1, wherein the fire-proof grade of the autoclaved aerated concrete slab is not less than the fire-proof requirement of the box steel column.
7. The method of constructing an autoclaved aerated concrete slab encased in a box-type steel column as recited in claim 1 wherein the size of the first mounting hole is smaller than the size of the second mounting hole.
8. The construction method of the autoclaved aerated concrete slab outsourced by the box steel column according to claim 1 or 7, wherein the first mounting hole is a round hole, the second mounting hole is a rectangular hole, and the diameter of the first mounting hole and the width of the second mounting hole are both larger than the diameter of a stud of the hook bolt.
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| CN202111024004.XA CN113638546B (en) | 2021-09-02 | 2021-09-02 | Construction method for autoclaved aerated concrete slab wrapped by box-type steel columns |
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| JP3179293B2 (en) * | 1994-08-29 | 2001-06-25 | 積水ハウス株式会社 | Refractory coating structure of steel and refractory coating method |
| JP2000034791A (en) * | 1998-07-17 | 2000-02-02 | Nihon Ytong Co Ltd | Column fire-resistant coating structure |
| CN102587527A (en) * | 2012-03-14 | 2012-07-18 | 宝钢建筑系统集成有限公司 | Steel column-coated fire-protection construction method |
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| CN204081264U (en) * | 2014-06-13 | 2015-01-07 | 山东科技大学 | A kind of outer wrapping Combined fireproof steel I-column |
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| CN102926503A (en) * | 2012-03-19 | 2013-02-13 | 南京旭建新型建材股份有限公司 | Fireproof beam column applying autoclaved lightweight aerated concrete ultrathin plate |
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