CN113323395A - Winter construction method of steel structure thick-coating type non-expansion fireproof coating - Google Patents
Winter construction method of steel structure thick-coating type non-expansion fireproof coating Download PDFInfo
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- CN113323395A CN113323395A CN202110652257.5A CN202110652257A CN113323395A CN 113323395 A CN113323395 A CN 113323395A CN 202110652257 A CN202110652257 A CN 202110652257A CN 113323395 A CN113323395 A CN 113323395A
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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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
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/28—Safety or protective measures preventing damage to building parts or finishing work during construction against unfavourable weather influence
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
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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
- 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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- 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
- E04G3/22—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by roofs or ceilings
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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
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Abstract
The invention discloses a steel structure thick-coating type non-expansion fireproof coating winter construction method, which comprises the following steps: firstly, erecting an enclosure frame body; secondly, hanging heat preservation cotton cloth on the enclosure frame body; thirdly, determining a steel structure to be constructed; fourthly, spraying thick coating type non-expansion fireproof paint on the steel structure to be constructed. The method has simple steps, reasonable design and good construction quality, can simply, conveniently and quickly finish the construction of the steel structure thick-coating type non-expansion fireproof coating in winter, has totally closed construction operation environment and reduces environmental pollution.
Description
Technical Field
The invention belongs to the technical field of fireproof coating construction, and particularly relates to a steel structure thick-coating type non-expansion fireproof coating winter construction method.
Background
With the development of modern industrial technology and the increased awareness of human beings on environmental protection, an 'assembly type' construction mode with the advantages of high efficiency, high environmental protection, high quality, low pollution and the like becomes a new mainstream of the construction industry. The assembled steel structure building is taken as a structural system with the most obvious and outstanding advantages in the assembled structural system, and is greatly promoted by the government and the building industry in China.
The steel is a non-combustible building material, and has the characteristics of earthquake resistance, bending resistance and the like. In practical application, the steel can relatively increase the load capacity of a building and meet the requirement of aesthetic appearance of the building design; but, steel as a building material has some defects which are difficult to avoid in the aspect of fire prevention, the mechanical properties of the steel, such as yield point, tensile strength, elastic modulus and the like, are all rapidly reduced due to the rise of temperature, and in order to overcome the defects of the steel structure material in the aspect of fire prevention in practical application, fire prevention treatment is required, and at present, the common treatment mode is spraying fire-proof paint. However, the fireproof coating is limited by the characteristics of the material, and cannot be constructed when the environmental temperature is lower than 5 ℃, which becomes a technical problem in the construction field.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for constructing the steel structure thick-coating type non-expansion fireproof coating in winter, aiming at the defects in the prior art, the method has the advantages of simple steps, reasonable design and good construction quality, can simply, conveniently and quickly complete the steel structure thick-coating type non-expansion fireproof coating in winter, has totally closed construction operation environment and reduces environmental pollution.
In order to solve the technical problems, the invention adopts the technical scheme that: a steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps:
step one, building an enclosure frame body:
101, building an inner-layer frame body between two adjacent floor slabs; wherein, the inner layer frame body is arranged along the circumferential direction of the floor slab, and the upper end and the lower end of the inner layer frame body are both attached to the floor slab;
102, erecting cantilever frame bodies outside two adjacent floor slabs; wherein, the inner layer frame body is connected with the cantilever frame body through a transverse horizontal rod, and two vertically adjacent cantilever frame bodies are jointed;
103, erecting an overhanging reinforcement mechanism between the overhanging frame body and the steel structure column penetrating through the floor slab;
step 104, erecting a scissor support outside the cantilever frame body to obtain an enclosure frame body;
step two, hanging heat preservation cotton cloth on the enclosure frame body:
hanging heat preservation cotton cloth on the enclosure frame body;
step three, determining a steel structure to be constructed:
step 301, recording a floor slab at the lowest end of the enclosure frame body as a bottom floor slab, recording a floor slab at the highest end of the enclosure frame body as a top floor slab, and recording a plurality of floor slabs between the bottom floor slab and the top floor slab in the enclosure frame body as areas to be constructed;
step 302, sequencing the floor slabs in the area to be constructed from bottom to top and recording the floor slabs as the 1 st floor slab, the i-th floor slab and the n-th floor slab; wherein i and n are positive integers, i is more than or equal to 1 and less than or equal to n, and n is more than or equal to 2 and less than or equal to 4;
step 303, recording a steel structure between the 1 st floor and the 2 nd floor in the area to be constructed as a 1 st layer steel structure to be constructed, recording a steel structure between the ith floor and the (i + 1) th floor in the area to be constructed as an ith layer steel structure to be constructed, and recording a steel structure between the n-1 st floor and the nth floor in the area to be constructed as an n-1 st layer steel structure to be constructed;
step four, spraying thick coating type non-expansion fireproof coating on the steel structure to be constructed:
the method for respectively spraying the thick-coating type non-expansion fireproof coating on the steel structure to be constructed on the 1 st layer is the same as that on the steel structure to be constructed on the n-1 th layer, wherein the thick-coating type non-expansion fireproof coating is sprayed on the steel structure to be constructed on the i th layer, and the specific process is as follows:
401, arranging a warm air blower on the ith floor;
step 402, setting the ith layer of steel structure to be constructed to comprise an ith layer of steel structure column section between the ith floor slab and the (i + 1) th floor slab and an (i + 1) th layer of steel beam at the bottom of the (i + 1) th floor slab;
step 403, adhering a first control needle to the surface of the ith layer of steel structure column, and spraying a thick non-expansion fireproof coating on the surface of the ith layer of steel structure column to form a column fireproof coating layer; wherein, the fireproof coating layer covers the needle point of the first control needle;
404, sticking a second control needle on the surface of the (i + 1) th layer of steel beam, and spraying thick non-expansion fireproof coating on the surface of the (i + 1) th layer of steel beam to form a beam fireproof coating layer; wherein the beam fireproof paint layer covers the needle point of the second control needle.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: in step 101, an inner-layer frame body is erected between two adjacent floor slabs, and the specific process is as follows:
step 1011, erecting two rows of inner vertical rods between two adjacent floor slabs; wherein, the distance between two rows of inner upright stanchions is 1.5 m-2 m, and the upper and lower end surfaces of the inner upright stanchions are jointed with a floor slab;
step 1012, connecting inner longitudinal horizontal rods between the inner vertical rods in each row; wherein, the inner longitudinal horizontal rod, the inner vertical rod and the transverse horizontal rod are vertically arranged;
in the step 102, overhanging frame bodies are erected outside two adjacent floor slabs, and the specific process is as follows:
step 1021, erecting outer vertical rods on the outer sides of two adjacent floor slabs; the outer vertical rods and the inner vertical rods are vertically arranged in parallel, a space is arranged between the outer vertical rods and the peripheral side face of the floor slab, and the outer vertical rods and the inner vertical rods are connected through transverse horizontal rods;
step 1022, connecting outer longitudinal horizontal rods between the outer vertical rods; wherein, the outer longitudinal horizontal rod, the outer vertical rod and the transverse horizontal rod are vertically arranged.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: set up the reinforcement mechanism that encorbelments between the steel structure post of encorbelmenting the support body and passing the floor in step 103, concrete process is as follows:
step 1031, connecting horizontal reinforcing cross bars to the outer vertical rods and the two inner vertical rods; the steel structure column comprises a steel structure column, a cross brace, an inner vertical rod, two horizontal reinforcing cross rods, two outer vertical rods and two horizontal reinforcing cross rods, wherein the two horizontal reinforcing cross rods and the two outer vertical rods are vertically arranged with the inner vertical rod;
step 1032, erecting connecting cross bars on the other two opposite side faces of the steel structure column; the two connecting cross rods and the two horizontal reinforcing cross rods form a groined shape and tightly embrace the ith layer of steel structure column section;
step 1033, setting up a throwing support rod; one end of each throwing support rod is connected with the outer vertical rod and the two inner vertical rods, the other end of each throwing support rod is connected with the connecting cross rod, the number of the throwing support rods is two, and the two throwing support rods are attached to two opposite side faces of the ith layer of steel structure column section.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: in step 401, a warm air blower is arranged on the ith floor, and the specific process is as follows:
step 4011, dividing the ith floor into 5 regions, wherein the areas of the 5 regions are the same; wherein, 5 areas are 4 corner areas and 1 central position area respectively;
and step 4012, respectively placing a warm air blower in 5 areas of the ith floor.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: in step 403, a first control needle is pasted on the surface of the ith layer of steel structure column section, and the specific process is as follows:
step 4031, welding a first steel needle at the center of a first base plate to obtain a first control needle; the length multiplied by the width multiplied by the height of the first bottom plate is 30mm multiplied by 1mm, the length of the first steel needle is not less than 32mm, the diameter of the first steel needle is 1 mm-1.2 mm, and the first bottom plate and the first steel needle are vertically arranged;
step 4032, respectively sticking first control needles on four surfaces of the ith layer of steel structure column section; the distance between every two adjacent first control needles on each surface of the ith layer of steel structure column section along the height direction of the steel structure column section is 0.5-1 m;
and step 4033, thick-coating type non-expansion fireproof coatings are respectively sprayed on four surfaces of the ith steel structure column section until the thick-coating type non-expansion fireproof coatings cover the needle points of the first control needles to form a column fireproof coating layer.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: in step 404, a second control needle is stuck to the surface of the (i + 1) th layer of steel beam, and the specific process is as follows:
step 4041, welding a second steel needle at the center of the second bottom plate to obtain a second control needle; the length multiplied by the width multiplied by the height of the second bottom plate is 30mm multiplied by 1mm, the length of the second steel needle is not less than 22mm, the diameter of the second steel needle is 1 mm-1.2 mm, and the second steel needle and the second bottom plate are vertically arranged;
step 4042, respectively sticking second control needles on three surfaces of the (i + 1) th layer of steel beam section; the distance between every two adjacent second control needles on each surface of the (i + 1) th layer of steel beam section along the length direction of the steel beam is 0.5-1 m;
step 4043, respectively spraying thick-coating type non-expansion fireproof paint on the three surfaces of the (i + 1) th layer of steel beam until the thick-coating type non-expansion fireproof paint covers the needle point of each second control needle to form a beam fireproof paint layer.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: the preparation method of the thick-coating type non-expansion fireproof coating comprises the following specific steps:
gypsum-based non-intumescent fire-retardant coating for steel structure and water: and (3) putting the coagulant into an S3 type stirrer to stir for 1-5 min to obtain the thick-coating type non-expansive fireproof coating.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: in the step 403, the first control needle is stuck to the surface of the i-th layer of steel structure column section through universal glue;
in step 404, the second control needle is stuck on the surface of the (i + 1) th layer of steel beam through universal glue.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: when thick-coating type non-expansion fireproof paint is sprayed on the surface of the ith layer of steel structure column section in the step 403 and the thick-coating type non-expansion fireproof paint is sprayed on the surface of the (i + 1) th layer of steel beam in the step 404, the method comprises the following steps:
conveying the thick coating type non-expansion fireproof coating to a spray gun opening of a screw pressure feed type spraying machine for spraying through an extrusion pump; wherein the pressure of the spray gun mouth is 0.4 MPa-0.6 MPa, the diameter of the spray gun mouth is 8 mm-10 mm, and the distance between the spray gun mouth and the surface of the steel structure is 40 cm-50 cm.
The steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps of: 104, surrounding the periphery of the floor slab by the enclosure frame body, wherein the cross section of the enclosure frame body is rectangular;
in the second step, the number of the heat-insulating cotton cloth is multiple, the lap joint width of two adjacent heat-insulating cotton cloth is 0.8-1.2 m, and each heat-insulating cotton cloth is bound with the enclosure frame body through a steel wire rope;
in step 301, the number of the floor slabs in the area to be constructed is 2 to 4.
Compared with the prior art, the invention has the following advantages:
1. the construction method has simple steps, reasonable design and lower input construction cost.
2. According to the invention, by erecting the inner layer frame body and the cantilever frame body, the space of adjacent floor slabs and the support of the steel structure column to the cantilever frame body are effectively utilized, the frame body is prevented from being erected from the ground to the height of each floor slab, and the erection workload of the frame body is reduced, so that the construction period is shortened, the labor investment cost can be effectively reduced, and the labor and the time are saved; in addition, the enclosure frame body at the lower layer can be circulated to the floor at the upper layer for use, so that materials can be recycled, and the cost is saved.
3. According to the invention, the heat-insulating cotton cloth is hung on the enclosure frame body and is arranged around the floor slab in an enclosing way through the heat-insulating cotton cloth, so that the floor slab is integrally enclosed and blocked, the wind-proof and heat-insulating effects are achieved, and the thick-coating type non-expansion fireproof coating is convenient to construct in winter; in addition, the construction operation environment is totally closed, the pollution of dust generated in the spraying operation construction to the environment is avoided, and the purposes of energy conservation and environmental protection are realized; secondly, the heat preservation cotton can have enough to meet the need the use, can reuse the material, practices thrift the cost.
4. Two layers of floor slabs are reserved between the bottom of the enclosure frame body for hanging the heat-insulation cotton cloth and the bottom of the steel structure to be constructed, and two layers of floor slabs are reserved between the top of the enclosure frame body for hanging the heat-insulation cotton cloth and the top of the steel structure to be constructed, so that the heat-insulation effect of the steel structure to be constructed is ensured.
5. According to the invention, the warm air blower is arranged on the floor slab for heating, and the warm air blower is uniformly arranged integrally, so that the temperature of the environment where the steel structure to be constructed is located is higher than 5 ℃, and the steel structure thick-coating type non-expansion fireproof coating is ensured to be constructed in winter.
6. According to the invention, the first control needle is adhered to the surface of the ith layer of steel structure column section, the second control needle is adhered to the surface of the (i + 1) th layer of steel beam, the spraying thickness is accurately controlled by using the first control needle and the second control needle, and the spraying thickness in the traditional process is controlled only by the construction experience of workers.
In conclusion, the method has the advantages of simple steps, reasonable design and good construction quality, can simply, conveniently and quickly finish the construction of the steel structure thick-coating type non-expansion fireproof coating in winter, has totally closed construction operation environment and reduces environmental pollution.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of the building of the enclosure frame body of the invention.
Fig. 2 is a schematic structural view of the building of the cross braces on the enclosure frame body of the invention.
FIG. 3 is a schematic structural view of the enclosure frame and the heat-insulating cotton cloth according to the invention.
FIG. 4 is a schematic structural view of the i +1 th steel beam and the second control pin according to the present invention.
FIG. 5 is a schematic structural diagram of the ith layer of steel structure column and the first control needle of the present invention.
FIG. 6 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1, a cantilever frame body; 1-outer vertical rod; 1-2-outer longitudinal horizontal rods;
2-inner layer frame body; 2-1-inner vertical rod; 2-inner longitudinal horizontal rod;
3-horizontal bar; 4, a cantilever reinforcing mechanism; 4-1-throwing the stay bar;
4-2-horizontal reinforcing cross bars; 4-3-connecting the cross bar; 5, a warm air blower;
7-a second control needle; 7-1 — a second base plate;
7-2-a second steel needle; 8-a first control needle; 8-1 — a first floor;
8-2-a first steel needle; 9, a floor slab; 10-the ith layer of steel structure column section;
11-the (i + 1) th layer of steel beam; 13-a cross brace; 14-heat preservation cotton cloth.
Detailed Description
The steel structure thick-coating type non-expansion fireproof coating winter construction method shown in fig. 1 to 6 comprises the following steps:
step one, building an enclosure frame body:
101, building an inner layer frame body 2 between two adjacent floor slabs 9; wherein, the inner layer frame body 2 is arranged along the circumference of the floor slab 9, and the upper end and the lower end of the inner layer frame body 2 are both attached to the floor slab 9;
102, erecting an overhanging frame body 1 outside two adjacent floor slabs 9; wherein, the inner layer frame body 2 is connected with the cantilever frame body 1 through a transverse horizontal rod 3, and two cantilever frame bodies 1 which are adjacent up and down are jointed;
103, erecting an overhanging reinforcement mechanism 4 between the overhanging frame body 1 and the steel structure column 6 penetrating through the floor slab 9;
step 104, erecting a scissor support 13 on the outer side of the cantilever frame body 1 to obtain an enclosure frame body;
step two, hanging heat preservation cotton cloth on the enclosure frame body:
the enclosure frame body is hung with heat preservation cotton cloth 14;
step three, determining a steel structure to be constructed:
step 301, recording the floor slab 9 at the lowest end of the enclosure frame body as a bottom floor slab, recording the floor slab 9 at the uppermost end of the enclosure frame body as a top floor slab, and recording a plurality of floor slabs 9 positioned between the bottom floor slab and the top floor slab in the enclosure frame body as areas to be constructed;
step 302, sequencing the floor slabs in the area to be constructed from bottom to top and recording the floor slabs as the 1 st floor slab, the i-th floor slab and the n-th floor slab; wherein i and n are positive integers, i is more than or equal to 1 and less than or equal to n, and n is more than or equal to 2 and less than or equal to 4;
step 303, recording a steel structure between the 1 st floor and the 2 nd floor in the area to be constructed as a 1 st layer steel structure to be constructed, recording a steel structure between the ith floor and the (i + 1) th floor in the area to be constructed as an ith layer steel structure to be constructed, and recording a steel structure between the n-1 st floor and the nth floor in the area to be constructed as an n-1 st layer steel structure to be constructed;
step four, spraying thick coating type non-expansion fireproof coating on the steel structure to be constructed:
the method for respectively spraying the thick-coating type non-expansion fireproof coating on the steel structure to be constructed on the 1 st layer is the same as that on the steel structure to be constructed on the n-1 th layer, wherein the thick-coating type non-expansion fireproof coating is sprayed on the steel structure to be constructed on the i th layer, and the specific process is as follows:
401, arranging a warm air blower 5 on the ith floor;
step 402, setting the ith layer of steel structure to be constructed to comprise an ith layer of steel structure column section 10 positioned between the ith floor slab and the (i + 1) th floor slab and an (i + 1) th layer of steel beam 11 positioned at the bottom of the (i + 1) th floor slab;
step 403, adhering a first control needle 8 to the surface of the ith layer of steel structure column 10, and spraying thick non-expansion fireproof coating on the surface of the ith layer of steel structure column 10 to form a column fireproof coating layer; wherein the fireproof coating layer covers the needle point of the first control needle 8;
404, sticking a second control needle 7 on the surface of the (i + 1) th layer of steel beam 11, and spraying a thick non-expansion fireproof coating on the surface of the (i + 1) th layer of steel beam 11 to form a beam fireproof coating layer; wherein the beam fire retardant coating layer covers up to the tip of the second control needle 7.
In this embodiment, an inner layer frame body 2 is erected between two adjacent floor slabs 9 in step 101, and the specific process is as follows:
step 1011, erecting two rows of inner vertical rods 2-1 between two adjacent floor slabs 9; wherein, the distance between the two rows of inner upright stanchions 2-1 is 1.5 m-2 m, and the upper and lower end surfaces of the inner upright stanchions 2-1 are jointed with a floor slab 9;
step 1012, connecting inner longitudinal horizontal rods 2-2 between the inner vertical rods 2-1 in each row; wherein, the inner longitudinal horizontal rod 2-2, the inner vertical rod 2-1 and the transverse horizontal rod 3 are vertically arranged;
in the step 102, the overhanging frame body 1 is erected outside the two adjacent floor slabs 9, and the specific process is as follows:
step 1021, erecting external vertical rods 1-1 on the outer sides of two adjacent floor slabs 9; wherein, the outer upright stanchion 1-1 and the inner upright stanchion 2-1 are vertically arranged in parallel, a space is arranged between the outer upright stanchion 1-1 and the peripheral side surface of the floor slab 9, and the outer upright stanchion 1-1 and the inner upright stanchion 2-1 are connected by a transverse horizontal rod 3;
step 1022, connecting outer longitudinal horizontal rods 1-2 between the outer vertical rods 1-1; wherein, the outer longitudinal horizontal rod 2-2, the outer vertical rod 1-1 and the transverse horizontal rod 3 are vertically arranged.
In this embodiment, set up between the steel structure post 6 of the support body 1 of encorbelmenting and passing floor 9 in step 103 and encorbelment strengthening mechanism 4, specific process is as follows:
1031, connecting horizontal reinforcing cross bars 4-2 to the outer vertical rods 1-1 and the two inner vertical rods 2-1; the steel structure column comprises a steel structure column 6, wherein horizontal reinforcing cross rods 4-2 and outer vertical rods 1-1 are vertically arranged with the inner vertical rods 2-1, the number of the horizontal reinforcing cross rods 4-2 is two, the two horizontal reinforcing cross rods 4-2 are positioned at two opposite side surfaces of the steel structure column 6, and a cross brace 13 is connected with the outer vertical rods 1-1;
step 1032, erecting connecting cross bars 4-3 on the other two opposite side surfaces of the steel structure column 6; the two connecting cross rods 4-3 and the two horizontal reinforcing cross rods 4-2 form a groined shape and tightly embrace the ith layer of steel structure column section 10;
step 1033, setting up a throwing support rod 4-1; one end of each throwing support rod 4-1 is connected with the outer vertical rod 1-1 and the two inner vertical rods 2-1, the other end of each throwing support rod 4-1 is connected with the connecting cross rod 4-3, the number of the throwing support rods 4-1 is two, and the two throwing support rods 4-1 are attached to two opposite side faces of the i-th steel structure column section 10.
In this embodiment, in step 401, the fan heater 5 is disposed on the ith floor, and the specific process is as follows:
step 4011, dividing the ith floor into 5 regions, wherein the areas of the 5 regions are the same; wherein, 5 areas are 4 corner areas and 1 central position area respectively;
and step 4012, respectively placing a warm air blower 5 in each of the 5 areas of the ith floor.
In this embodiment, in step 403, a first control pin 8 is stuck to the surface of the i-th steel structure column section, and the specific process is as follows:
step 4031, welding a first steel needle 8-2 at the center of a first bottom plate 8-1 to obtain a first control needle 8; the length multiplied by the width multiplied by the height of the first bottom plate 8-1 is 30mm multiplied by 1mm, the length of the first steel needle 8-2 is not less than 32mm, the diameter of the first steel needle 8-2 is 1 mm-1.2 mm, and the first bottom plate 8-1 and the first steel needle 8-2 are vertically arranged;
step 4032, respectively sticking first control needles 8 on four surfaces of the ith layer of steel structure column section 11; wherein, the distance between every two adjacent first control needles 8 on each surface of the ith layer of steel structure column section 11 along the height direction of the steel structure column section is 0.5-1 m;
step 4033, thick-coating type non-expansion fireproof coatings are respectively sprayed on four surfaces of the ith steel structure column section 11 until the thick-coating type non-expansion fireproof coatings cover the needle points of the first control needles 8, and a column fireproof coating layer is formed.
In this embodiment, in step 404, a second control pin 7 is adhered to the surface of the i +1 th layer of steel beam 11, and the specific process is as follows:
step 4041, welding a second steel needle 7-2 at the center of the second bottom plate 7-1 to obtain a second control needle 7; the length multiplied by the width multiplied by the height of the second bottom plate 7-1 is 30mm multiplied by 1mm, the length of the second steel needle 7-2 is not less than 22mm, the diameter of the second steel needle 7-2 is 1 mm-1.2 mm, and the second steel needle 7-2 and the second bottom plate 7-1 are vertically arranged;
step 4042, respectively sticking second control needles 7 on three surfaces of the (i + 1) th layer of steel beam section 10; the distance between every two adjacent second control needles 7 on each surface of the (i + 1) th layer of steel beam section 10 along the length direction of the steel beam is 0.5-1 m;
step 4043, respectively spraying thick-coating type non-expansion fireproof paint on the three surfaces of the (i + 1) th layer of steel beam 11 until the thick-coating type non-expansion fireproof paint covers the needle point of each second control needle 7, so as to form a beam fireproof paint layer.
In this embodiment, the preparation of the thick coating type non-intumescent fire retardant coating specifically comprises the following steps:
gypsum-based non-intumescent fire-retardant coating for steel structure and water: and (3) putting the coagulant into an S3 type stirrer to stir for 1-5 min to obtain the thick-coating type non-expansive fireproof coating.
In this embodiment, in step 403, the first control needle 8 is stuck to the surface of the i-th layer steel structure column section 11 through universal glue;
in step 404, the second control needle 7 is stuck on the surface of the i +1 th layer of steel beam 11 by universal glue.
In this embodiment, when the thick-coating type non-intumescent fire retardant coating is sprayed on the surface of the i-th layer of steel structure column section 11 in step 403 and the thick-coating type non-intumescent fire retardant coating is sprayed on the surface of the i + 1-th layer of steel beam 11 in step 404, the following steps are performed:
conveying the thick coating type non-expansion fireproof coating to a spray gun opening of a screw pressure feed type spraying machine for spraying through an extrusion pump; wherein the pressure of the spray gun mouth is 0.4 MPa-0.6 MPa, the diameter of the spray gun mouth is 8 mm-10 mm, and the distance between the spray gun mouth and the surface of the steel structure is 40 cm-50 cm.
In this embodiment, in step 104, the enclosure frame body surrounds the floor 9, and the cross section of the enclosure frame body 9 is rectangular;
in the second step, the number of the heat-insulating cotton cloth 14 is multiple, the lap joint width of two adjacent heat-insulating cotton cloth 14 is 0.8-1.2 m, and each heat-insulating cotton cloth 14 is bound with the enclosure frame body through a steel wire rope;
in step 301, the number of the floor slabs in the area to be constructed is 2 to 4.
In this embodiment, the gypsum-based non-intumescent fire retardant coating for steel structure and water in step a: the mass ratio of the coagulant is 1 (1.5-1.6) to 0.06-0.1.
In this embodiment, in practical use, the thick coating type non-intumescent fire retardant coating obtained in step a may be poured into a vibrating screen for filtration, and then pumped by an extrusion pump.
In this embodiment, when the thick coating type non-intumescent fire retardant coating is sprayed on the surface of the ith steel structure column 10, the gypsum-based non-intumescent steel structure fire retardant coating in the step a is GT-NSP-fp3.00-KYT/M6/indoor non-intumescent steel structure fire retardant coating.
In the embodiment, when the thick coating type non-expansion fireproof coating is sprayed on the surface of the i +1 th layer of steel beam 11, the gypsum-based non-expansion steel structure fireproof coating in the step A is GT-NSP-Fp 2.00-KYT/M6/indoor non-expansion steel structure fireproof coating.
In this example, the accelerator used was a type J85 accelerator.
In this embodiment, one end of the horizontal reinforcing cross bar 4-2 and the inner longitudinal horizontal bar 2-2 are connected with the outer longitudinal horizontal bar 1-2.
In conclusion, the method has the advantages of simple steps, reasonable design and good construction quality, can simply, conveniently and quickly finish the construction of the steel structure thick-coating type non-expansion fireproof coating in winter, has totally closed construction operation environment and reduces environmental pollution.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A steel structure thick-coating type non-expansion fireproof coating winter construction method is characterized by comprising the following steps:
step one, building an enclosure frame body:
101, building an inner layer frame body (2) between two adjacent floor slabs (9); wherein, the inner layer frame body (2) is arranged along the circumferential direction of the floor slab (9), and the upper end and the lower end of the inner layer frame body (2) are both jointed with the floor slab (9);
102, erecting an overhanging frame body (1) outside two adjacent floor slabs (9); wherein the inner layer frame body (2) is connected with the cantilever frame body (1) through a transverse horizontal rod (3), and two vertically adjacent cantilever frame bodies (1) are jointed;
103, erecting an overhanging reinforcement mechanism (4) between the overhanging frame body (1) and a steel structure column (6) penetrating through a floor slab (9);
step 104, erecting a scissor support (13) on the outer side of the cantilever frame body (1) to obtain an enclosure frame body;
step two, hanging heat preservation cotton cloth on the enclosure frame body:
the enclosure frame body is hung with heat preservation cotton cloth (14);
step three, determining a steel structure to be constructed:
step 301, recording a floor slab (9) at the lowest end of the enclosure frame body as a bottom floor slab, recording a floor slab (9) at the uppermost end of the enclosure frame body as a top floor slab, and recording a plurality of floor slabs (9) positioned between the bottom floor slab and the top floor slab in the enclosure frame body as areas to be constructed;
step 302, sequencing the floor slabs in the area to be constructed from bottom to top and recording the floor slabs as the 1 st floor slab, the i-th floor slab and the n-th floor slab; wherein i and n are positive integers, i is more than or equal to 1 and less than or equal to n, and n is more than or equal to 2 and less than or equal to 4;
step 303, recording a steel structure between the 1 st floor and the 2 nd floor in the area to be constructed as a 1 st layer steel structure to be constructed, recording a steel structure between the ith floor and the (i + 1) th floor in the area to be constructed as an ith layer steel structure to be constructed, and recording a steel structure between the n-1 st floor and the nth floor in the area to be constructed as an n-1 st layer steel structure to be constructed;
step four, spraying thick coating type non-expansion fireproof coating on the steel structure to be constructed:
the method for respectively spraying the thick-coating type non-expansion fireproof coating on the steel structure to be constructed on the 1 st layer is the same as that on the steel structure to be constructed on the n-1 th layer, wherein the thick-coating type non-expansion fireproof coating is sprayed on the steel structure to be constructed on the i th layer, and the specific process is as follows:
401, arranging a warm air blower (5) on the ith floor;
step 402, setting the ith layer of steel structure to be constructed to comprise an ith layer of steel structure column section (10) positioned between the ith floor slab and the (i + 1) th floor slab and an (i + 1) th layer of steel beam (11) positioned at the bottom of the (i + 1) th floor slab;
step 403, adhering a first control needle (8) to the surface of the ith layer of steel structure column (10), and spraying thick non-expansion fireproof coating on the surface of the ith layer of steel structure column (10) to form a column fireproof coating layer; wherein the fireproof coating layer covers the needle point of the first control needle (8);
404, sticking a second control needle (7) on the surface of the (i + 1) th layer of steel beam (11), and spraying a thick non-expansion fireproof coating on the surface of the (i + 1) th layer of steel beam (11) to form a beam fireproof coating layer; wherein the beam fireproof paint layer covers the needle point of the second control needle (7).
2. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: in the step 101, an inner layer frame body (2) is erected between two adjacent floor slabs (9), and the specific process is as follows:
step 1011, erecting two rows of inner vertical rods (2-1) between two adjacent floor slabs (9); wherein, the distance between the two rows of inner upright stanchions (2-1) is 1.5 m-2 m, and the upper and lower end surfaces of the inner upright stanchions (2-1) are jointed with a floor slab (9);
step 1012, connecting inner longitudinal horizontal rods (2-2) between the inner vertical rods (2-1) in each row; wherein, the inner longitudinal horizontal rod (2-2), the inner vertical rod (2-1) and the transverse horizontal rod (3) are vertically arranged;
in the step 102, an overhanging frame body (1) is erected outside two adjacent floor slabs (9), and the specific process is as follows:
step 1021, erecting outer vertical rods (1-1) on the outer sides of two adjacent floor slabs (9); the outer vertical rod (1-1) and the inner vertical rod (2-1) are vertically arranged in parallel, a space is arranged between the outer vertical rod (1-1) and the peripheral side surface of the floor (9), and the outer vertical rod (1-1) and the inner vertical rod (2-1) are connected through a transverse horizontal rod (3);
step 1022, connecting outer longitudinal horizontal rods (1-2) between the outer vertical rods (1-1); wherein, the outer longitudinal horizontal rod (2-2), the outer upright rod (1-1) and the transverse horizontal rod (3) are vertically arranged.
3. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 2, wherein: set up between cantilever support body (1) and the steel construction post (6) of passing floor (9) in step 103 and encorbelment strengthening mechanism (4), the concrete process is as follows:
step 1031, connecting horizontal reinforcing cross bars (4-2) on the outer vertical rods (1-1) and the two inner vertical rods (2-1); the steel structure column comprises a steel structure column (6), wherein horizontal reinforcing cross rods (4-2) and outer vertical rods (1-1) are vertically arranged with the inner vertical rods (2-1), the number of the horizontal reinforcing cross rods (4-2) is two, the two horizontal reinforcing cross rods (4-2) are positioned on two opposite side surfaces of the steel structure column (6), and cross braces (13) are connected with the outer vertical rods (1-1);
step 1032, erecting connecting cross bars (4-3) on the other two opposite side surfaces of the steel structure column (6); wherein, the two connecting cross rods (4-3) and the two horizontal reinforcing cross rods (4-2) form a groined shape and tightly embrace the ith layer of steel structure column section (10);
step 1033, setting up a throwing support rod (4-1); one end of each throwing support rod (4-1) is connected with the outer vertical rod (1-1) and the two inner vertical rods (2-1), the other end of each throwing support rod (4-1) is connected with the connecting cross rod (4-3), the number of the throwing support rods (4-1) is two, and the two throwing support rods (4-1) are attached to two opposite side surfaces of the ith layer of steel structure column section (10).
4. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: in step 401, a warm air blower (5) is arranged on the ith floor, and the specific process is as follows:
step 4011, dividing the ith floor into 5 regions, wherein the areas of the 5 regions are the same; wherein, 5 areas are 4 corner areas and 1 central position area respectively;
and step 4012, respectively placing a warm air blower (5) in 5 areas of the ith floor.
5. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: in step 403, a first control needle (8) is pasted on the surface of the ith layer of steel structure column section, and the specific process is as follows:
step 4031, welding a first steel needle (8-2) at the center of a first bottom plate (8-1) to obtain a first control needle (8); the length multiplied by the width multiplied by the height of the first bottom plate (8-1) is 30mm multiplied by 1mm, the length of the first steel needle (8-2) is not less than 32mm, the diameter of the first steel needle (8-2) is 1 mm-1.2 mm, and the first bottom plate (8-1) and the first steel needle (8-2) are vertically arranged;
step 4032, respectively sticking first control needles (8) on four surfaces of the ith layer of steel structure column section (11); the distance between every two adjacent first control needles (8) on each surface of the ith layer of steel structure column section (11) along the height direction of the steel structure column section is 0.5-1 m;
and step 4033, thick-coating type non-expansion fireproof coatings are respectively sprayed on four surfaces of the ith steel structure column section (11) until the thick-coating type non-expansion fireproof coatings cover the needle points of the first control needles (8), so that a column fireproof coating layer is formed.
6. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: in the step 404, a second control needle (7) is pasted on the surface of the (i + 1) th layer of steel beam (11), and the specific process is as follows:
4041, welding a second steel needle (7-2) at the center of the second bottom plate (7-1) to obtain a second control needle (7); the length, the width and the height of the second bottom plate (7-1) are 30mm, 30mm and 1mm respectively, the length of the second steel needle (7-2) is not less than 22mm, the diameter of the second steel needle (7-2) is 1 mm-1.2 mm, and the second steel needle (7-2) and the second bottom plate (7-1) are vertically arranged;
step 4042, respectively sticking second control needles (7) on three surfaces of the (i + 1) th layer of steel beam section (10); the distance between every two adjacent second control needles (7) on each surface of the (i + 1) th layer of steel beam section (10) along the length direction of the steel beam is 0.5-1 m;
step 4043, respectively spraying thick-coating type non-expansion fireproof paint on the three surfaces of the (i + 1) th layer of steel beam (11) until the thick-coating type non-expansion fireproof paint covers the needle point of each second control needle (7), so as to form a beam fireproof paint layer.
7. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: the preparation method of the thick-coating type non-expansion fireproof coating comprises the following specific steps:
gypsum-based non-intumescent fire-retardant coating for steel structure and water: and (3) putting the coagulant into an S3 type stirrer to stir for 1-5 min to obtain the thick-coating type non-expansive fireproof coating.
8. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: in the step 403, the first control needle (8) is stuck to the surface of the i-th layer of steel structure column section (11) through universal glue;
in step 404, the second control needle (7) is pasted on the surface of the (i + 1) th layer of steel beam (11) through universal glue.
9. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: when the thick-coating type non-expansion fireproof coating is sprayed on the surface of the ith steel structure column section (11) in the step 403 and the thick-coating type non-expansion fireproof coating is sprayed on the surface of the (i + 1) th steel beam (11) in the step 404, the following steps are performed:
conveying the thick coating type non-expansion fireproof coating to a spray gun opening of a screw pressure feed type spraying machine for spraying through an extrusion pump; wherein the pressure of the spray gun mouth is 0.4 MPa-0.6 MPa, the diameter of the spray gun mouth is 8 mm-10 mm, and the distance between the spray gun mouth and the surface of the steel structure is 40 cm-50 cm.
10. The method for constructing the steel structure thick-coated non-intumescent fire retardant coating in winter as claimed in claim 1, wherein the method comprises the following steps: 104, surrounding the floor (9) by the enclosure frame body, wherein the cross section of the enclosure frame body (9) is rectangular;
in the second step, the number of the heat-insulating cotton cloth (14) is multiple, the lap joint width of two adjacent heat-insulating cotton cloth (14) is 0.8-1.2 m, and each heat-insulating cotton cloth (14) is bound with the enclosure frame body through a steel wire rope;
in step 301, the number of the floor slabs in the area to be constructed is 2 to 4.
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