CN113931384A - Construction method for steel structure pressure relief roof - Google Patents

Construction method for steel structure pressure relief roof Download PDF

Info

Publication number
CN113931384A
CN113931384A CN202111089175.0A CN202111089175A CN113931384A CN 113931384 A CN113931384 A CN 113931384A CN 202111089175 A CN202111089175 A CN 202111089175A CN 113931384 A CN113931384 A CN 113931384A
Authority
CN
China
Prior art keywords
roof
construction
steel
layer
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111089175.0A
Other languages
Chinese (zh)
Other versions
CN113931384B (en
Inventor
彭睿
王通
郭振志
张自豪
刘达强
顾晓栋
刘宜飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CCCC Fourth Highway Engineering Co Ltd
Original Assignee
CCCC Fourth Highway Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CCCC Fourth Highway Engineering Co Ltd filed Critical CCCC Fourth Highway Engineering Co Ltd
Priority to CN202111089175.0A priority Critical patent/CN113931384B/en
Publication of CN113931384A publication Critical patent/CN113931384A/en
Application granted granted Critical
Publication of CN113931384B publication Critical patent/CN113931384B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B7/00—Roofs; Roof construction with regard to insulation
    • E04B7/02—Roofs; Roof construction with regard to insulation with plane sloping surfaces, e.g. saddle roofs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D11/00—Roof covering, as far as not restricted to features covered by only one of groups E04D1/00 - E04D9/00; Roof covering in ways not provided for by groups E04D1/00 - E04D9/00, e.g. built-up roofs, elevated load-supporting roof coverings
    • E04D11/02—Build-up roofs, i.e. consisting of two or more layers bonded together in situ, at least one of the layers being of watertight composition
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage; Sky-lights
    • E04D13/16—Insulating devices or arrangements in so far as the roof covering is concerned, e.g. characterised by the material or composition of the roof insulating material or its integration in the roof structure
    • E04D13/1606—Insulation of the roof covering characterised by its integration in the roof structure
    • E04D13/1612—Insulation of the roof covering characterised by its integration in the roof structure the roof structure comprising a supporting framework of roof purlins or rafters
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories

Abstract

The invention belongs to the technical field of steel structures of plants, and particularly relates to a construction method of a steel structure pressure relief roof, which comprises the following steps: the construction method comprises the steps of steel structure main body construction and roof construction, wherein the steel structure hoisting step comprises a splicing frame erection step, a steel roof beam hoisting step, a steel roof beam splicing step and a purline construction step; the roof construction steps comprise the installation of a structural slope-finding reinforced concrete roof, the installation of a building slope-finding reinforced concrete roof and the installation of a light pressure-relief fragile roof, and the invention has the beneficial effects that: the steel construction roofing is light pressure release roofing, adopts TPO to take fiber backing type waterproofing membrane, PMC polymer modified cement base waterproof mortar, rock wool heat preservation, double-deck fiber reinforcement cement board fissure of displacement to arrange, the fiber reinforcement cement board, when the structure is firm, plays water-proof effects effectively, and is rational in infrastructure to improved the stability of rigid coupling effectively, and the steel construction atress is even.

Description

Construction method for steel structure pressure relief roof
Technical Field
The invention relates to the technical field of steel structures of plants, in particular to a construction method of a steel structure pressure relief roof.
Background
The steel structure construction difficulty of the factory building is very high, and the requirements on the segmentation requirements, the node connection form, the finished product protection, the installation precision and the like of the components in the aspects of component manufacturing, transportation, assembly, installation and the like are very high.
The existing factory building structure is mainly assembled and installed on site by scattered components, the efficiency of installation and assembly is low, and the stress between the structures is not uniform, so that the structure is stable; the working procedure of roof laying is unreasonable, which results in a great amount of time waste and poor waterproof effect.
Disclosure of Invention
The invention provides a construction method for a steel structure pressure relief roof.
Therefore, the invention aims to provide a construction method of a steel structure pressure relief roof, which is characterized in that the steps of building an assembling frame, hoisting a steel roof beam, assembling the steel roof beam and constructing purlines are reasonably carried out, and then the steps of installing a structure slope-seeking reinforced concrete roof, installing a building slope-seeking reinforced concrete roof and installing a light pressure relief fragile roof are carried out, so that the steel structure is stressed uniformly, the stress is reasonably relieved, the installation and assembly efficiency is improved, the waterproof effect is good, and the problems that the existing factory building structure is assembled and installed mainly by scattered components on site, the installation and assembly efficiency is low, the stress between the structures is uneven, and the structure is stable are solved; the process of roofing laying is unreasonable, leads to wasting a large amount of time to the poor problem of water-proof effects.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
a construction method of a steel structure pressure relief roof comprises the following steps: the construction method comprises the steps of steel structure main body construction and roof construction, wherein the steel structure hoisting step comprises a splicing frame erection step, a steel roof beam hoisting step, a steel roof beam splicing step and a purline construction step; the roof construction step comprises the steps of installing a structural slope-finding reinforced concrete roof, installing a building slope-finding reinforced concrete roof and installing a light pressure-relief fragile roof;
erecting an assembly frame: the support protection frame is erected by adopting a steel pipe, and the protection frame wall connecting piece is transversely two-step and three-span; the top of the center of the splicing point of the steel beam is provided with a steel plate, the vertical rods are arranged at equal intervals in the longitudinal and transverse directions, the top of the vertical steel tube is provided with an adjustable U-shaped jacking, and the support frame is connected with the frame column in a column embracing mode along the direction of the frame column, so that one step is performed;
hoisting the steel roof beam: after the first roof truss is hoisted in place, the first roof truss is connected with a bolt on a protective wall or temporarily fixed by a cable-drawing wind rope, and after more than two roof trusses are installed, a supporting rod and a tie rod are installed;
assembling the steel roof beam: the steel roof girder is divided into two sections along the east-west direction, and the west section can be hoisted only after the east section of the roof girder is hoisted and fixed;
purline construction: rigid support, horizontal support, purlin installation after the inter-column support is installed, and steel structure main body adjustment and calibration are carried out, the welding of purlin support is carried out on the steel beam according to the marking position of the size shown in the figure, and the purlin support is welded and fixed according to the line
The welding positions of the purlin supports in the same row are on the same straight line and are vertical to the beam, and for the roof with the gradient less than 1:12.5, the phenomenon of uneven roof caused by beam deflection is eliminated when the purlin is installed;
the brace between the purlins has a stabilizing effect on the purlins, and nuts at each end of the brace on two surfaces of the purlins are screwed during installation so as to straighten the purlins;
fixing: mounting a selective crane or manually positioning the purlines, fixing the purlines and purline supporting pieces on the main steel structure by bolts by using a welding machine, welding or fixing the purlines by bolts according to design requirements, and adjusting the positions of the purlines before fixing;
the structure is used for slope finding and reinforced concrete roof installation: cleaning a base layer and constructing a heat insulation layer: an extruded polystyrene foam plastic plate is used for laying a heat-insulating layer, exhausting air and smoke from a roof and enabling a structure to penetrate through the periphery of the heat-insulating layer and the middle part of a large-area roof, and vent holes for releasing moisture of a slope finding layer are reserved every 6 m; c20 fine stone concrete leveling, 1.5mm thick polymer cement waterproof paint, 20 thick C20 fine stone concrete leveling after the extrusion molding polystyrene foam plastic board is paved; coating a bottom waterproof layer: dipping the primer with a rolling brush or a paintbrush, and uniformly brushing the primer on the base layer;
coating a detail additional layer: sealing or adding additional layers including embedding sealing paste and additional layers of details on weak parts such as pipe roots, internal corners and external corners which are easy to leak;
self-adhesion type TPO waterproofing membrane construction, including basic unit's clearance, smear grout, node enhancement processing, carry thick liquid, maintenance: maintaining for 48 hours after the coiled material is paved and pasted, and performing seam treatment on the coiled material: after cleaning the lap joint part, uncovering the isolating film on the lap joint part of the coiled material and covering and pressing the isolating film on the butt joint part by using a self-adhesive sealing strip;
and (3) rigid roof construction: before the construction of the rigid roof, the roof separation net is arranged according to a drawing, parting is carried out according to the length of 3m multiplied by 3m, and dividing joints are arranged at the turning part of the roof and the joint of the structure of the convex roof;
using fine stone concrete to firstly carry out lapping and bottoming on the root of the parapet wall, and using mortar to carry out surface finishing and press polishing on the surface;
the fine stone concrete waterproof roof is provided with reinforcing mesh sheets, the reinforcing mesh sheets are cut off at the separation seams, and a non-woven fabric isolation layer is laid in a dry mode before the reinforcing mesh sheets are laid;
the large-area rigid surface layer is cast by adopting a skip method, and secondary press polishing is carried out after the concrete receives water;
and (3) building slope finding reinforced concrete roof installation: cleaning a base layer, paving extruded sheets at staggered joints, sloping light aggregate concrete, leveling cement mortar with the thickness of 20mm being 1:3, and modifying PMC polymer modified cement-based waterproof mortar with the thickness of 2 mm;
laying TPO tape fiber backing type waterproof coiled materials: cleaning a base layer: the base layer is smooth, clean, free of impurities, dry and free of open water, and the insulation board is ensured to be laid smoothly;
construction of a heat insulation layer: cleaning a base layer before heat preservation construction; filling and compacting the pipe root part penetrating through the roof, the wall surface and other structural layers by using pea stone concrete doped with 3% of micro-expanding agent, and fixing the pipe root; after construction, concealed acceptance check, heat preservation and paving, and stable cushion are carried out, the heat preservation layer is paved in a staggered joint way, and the gaps between the plates are densely embedded and filled with chips made of the same materials;
construction of the light aggregate concrete slope layer: when the light aggregate concrete is laid, uniformly laying the concrete on the heat insulation layer;
paving 20 thick 1 after finishing leveling by cement mortar and paving the rock wool heat-insulating board: 3, cement anti-cracking mortar;
the base layer is to be processed to be flat and solid, a proper tool is selected to clean the base layer,
preparing materials: proportioning according to the proportion, wherein the liquid material is as follows: the powder lot is 1: 4;
after the detail node treatment is finished and the coating film is dried, performing the first large-surface coating construction, and uniformly coating the coating film by using ingredients;
after the first coating is fully cured, performing second coating construction, wherein the brushing direction is vertical to the first coating, and after drying, brushing the next coating;
TPO takes fiber backing type waterproofing membrane construction: cleaning a base layer and pre-paving coiled materials: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller;
coil treatment and coil welding: the lap seams of the coiled materials are uniformly welded by using a handheld welding machine or an automatic crawling welding machine, and when the seam of the large-area coiled material is welded by using the automatic crawling welding machine, the seam is compacted by using a handheld silica gel compression roller and is pressed along with welding;
closing the coiled material: after the hot air welding is finished, cooling is carried out, and the trimming edge sealing paste is extruded and coated on the trimming edges of all TPO coiled materials exposed out of the polyester fabric matrix for sealing;
paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method;
and (3) mounting the light pressure-relief fragile roof: the long edge direction of cement compaction fibreboard panel must be perpendicular with the direction of fossil fragments when laying to make panel width direction's seam staggered arrangement, rock wool heated board installation: utilize rock wool heated board to lay the heat preservation and should pave, fill up steadily, should the fissure of displacement lay when the heat preservation is laid, the piece that the gap between boards used like material inlays to fill closely, the rock wool board process of laying should pop out fossil fragments position line on the heated board, the rock wool heated board is laid and is laid 1 after accomplishing: 3, the anti-crack cement mortar is internally provided with alkali-resistant glass fiber gridding cloth;
TPO takes fiber backing type waterproofing membrane construction, and the coiled material is spread in advance: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller; coil treatment and coil welding: closing the coiled material: after hot air welding is finished, cooling for at least 30 minutes, and extruding and coating trimming sealing paste on the trimming edges of all TPO coiled materials exposed out of the polyester fabric tire bodies for sealing; and paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the step of hoisting the steel roof beam, the steel plate is provided with continuous support in the shape of Chinese character 'zhi' around to enhance the vertical rigidity of the bent frame system and the stability of the upright, and the capability of the upright for bearing the load in the vertical direction is improved.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the construction step of the structure slope finding reinforced concrete roof, a base layer is cleaned before heat insulation construction; the pipe root part penetrating through the roof, the wall surface and other structural layers is tightly filled with 3 percent of micro-expanding agent-doped pea gravel concrete, and the pipe root is fixed.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the construction step of the building slope finding reinforced concrete roof, waterproof paint is adopted for multiple times of coating when the head of the coating is folded.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the step of welding the coiled materials in the installation of the reinforced concrete roof 200 for slope finding of the building, the temperature of a welding gun is controlled between 250 ℃ and 450 ℃, and the welding speed is 0.2-0.5 m/min.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the construction step of the slope-finding reinforced concrete roof of the building, coating is additionally coated for 2-4 times on the foundation details such as pipe roots, internal and external corners, deformation joints and the like, a layer of reinforced cloth reinforcement treatment is added at positions where water leakage easily occurs, the coating is uniformly coated once by using a rubber scraper or a paintbrush in thickness, the reinforced cloth is immediately pasted for reinforcement treatment and soaked and paved by glass fiber cloth, a layer of glass fiber cloth is paved at the deformation joint position, then the coating is additionally coated to form an additional layer of empty pavement structure, and the paved and flattened rib cloth is tightly attached to the lower layer of coating.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the step of constructing the slope finding reinforced concrete roof of the building, the steel roof is cooled for at least 30 minutes after hot air welding is finished.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the roof construction step, before the steps of slope finding reinforced concrete roof installation and light pressure relief fragile roof construction, base layer cleaning is required.
As a preferred scheme of the construction method of the steel structure pressure relief roof, the construction method comprises the following steps: in the light pressure relief fragile roof construction step, the rock wool heated board passes through the fiber reinforced cement board directly through the self tapping type heat preservation nail and is fixed with the steel joist.
Compared with the prior art: the steel structure hoisting step comprises an assembling frame erecting step, a steel roof beam hoisting step, a steel roof beam assembling step and a purline construction step through reasonable arrangement, the roof construction step comprises structure slope finding reinforced concrete roof installation, building slope finding reinforced concrete roof installation and light pressure relief fragile roof installation, the installation precision is high, hoisting and fixing are carried out after the assembly, the installation speed is effectively accelerated, and the quality and the precision after the installation are ensured;
the steel structure roof is a light pressure relief roof, TPO (thermoplastic polyolefin) belt fiber backing type waterproof coiled material, PMC (Poly-propylene-styrene) polymer modified cement-based waterproof mortar, a rock wool heat insulation layer, a double-layer fiber reinforced cement board staggered joint arrangement and a fiber reinforced cement board are adopted, and the waterproof effect is effectively achieved while the structure is stable;
the structure is reasonable, so that the stability of rigid connection is effectively improved, and the stress of the steel structure is uniform.
Drawings
FIG. 1 is a schematic structural view of a steel structure provided by the present invention;
FIG. 2 is a left side view of FIG. 1 provided with the present invention;
FIG. 3 is a right side view of FIG. 1 provided with the present invention;
FIG. 4 is a schematic view of a purlin installation provided by the present invention;
FIG. 5 is a connection diagram of a corner brace in a steel structural body according to the present invention.
Reference numerals: steel structure main body 100, slope finding reinforced concrete roof 200, light pressure relief fragile roof 300, purlin 400 and purlin support piece 500
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides a construction method of a steel structure pressure relief roof, which refers to the following steps of fig. 1-5: the construction method comprises the steps of steel structure main body 100 construction and roof construction, wherein the steel structure hoisting step comprises a splicing frame erection step, a steel roof beam hoisting step, a steel roof beam splicing step and a purline 400 construction step; the roof construction step comprises the steps of installing a structural slope-finding reinforced concrete roof 200, installing a building slope-finding reinforced concrete roof 200 and installing a light pressure-relief fragile roof 300;
erecting an assembly frame: the support protection frame is erected by adopting a steel pipe, and the protection frame wall connecting piece is transversely two-step and three-span; the top of the center of the splicing point of the steel beam is provided with a steel plate, the vertical rods are arranged at equal intervals in the longitudinal and transverse directions, the top of the vertical steel tube is provided with an adjustable U-shaped jacking, and the support frame is connected with the frame column in a column embracing mode along the direction of the frame column, so that one step is performed;
hoisting the steel roof beam: after the first roof truss is hoisted in place, the first roof truss is connected with a bolt on a protective wall or temporarily fixed by a cable-drawing wind rope, and after more than two roof trusses are installed, a supporting rod and a tie rod are installed;
assembling the steel roof beam: the steel roof girder is divided into two sections along the east-west direction, and the west section can be hoisted only after the east section of the roof girder is hoisted and fixed;
purlin 400 construction step: the purline 400 is installed after the column supports are installed, the steel structure main body is adjusted and calibrated, the purline supports are welded on the steel beams according to the marking positions of the sizes shown in the drawing, and the purline supports are welded and fixed according to the lines;
the welding positions of the purlin supports in the same row are on the same straight line and are vertical to the beam, and for the roof with the gradient less than 1:12.5, the purlin 400 is installed by paying attention to eliminate the phenomenon of uneven roof caused by beam deflection;
the brace between the purlins 400 has a stabilizing effect on the purlins 400, and nuts at each end of the brace on two sides of the purlins 400 are screwed during installation so as to straighten the purlins 400;
fixing: mounting a selective crane or manually positioning the purline 400, fixing the purline 400 and the purline support 500 on the main steel structure by using bolts by using a welding machine, welding or fixing the purline by using the bolts according to design requirements, and adjusting the position again before fixing;
the installation of the reinforced concrete roof 200 is found to the structure: cleaning a base layer and constructing a heat insulation layer: an extruded polystyrene foam plastic plate is used for laying a heat-insulating layer, exhausting air and smoke from a roof and enabling a structure to penetrate through the periphery of the heat-insulating layer and the middle part of a large-area roof, and vent holes for releasing moisture of a slope finding layer are reserved every 6 m; c20 fine stone concrete leveling, 1.5mm thick polymer cement waterproof paint, 20 thick C20 fine stone concrete leveling after the extrusion molding polystyrene foam plastic board is paved; coating a bottom waterproof layer: dipping the primer with a rolling brush or a paintbrush, and uniformly brushing the primer on the base layer;
coating a detail additional layer: sealing or adding additional layers including embedding sealing paste and additional layers of details on weak parts such as pipe roots, internal corners and external corners which are easy to leak;
self-adhesion type TPO waterproofing membrane construction, including basic unit's clearance, smear grout, node enhancement processing, carry thick liquid, maintenance: maintaining for 48 hours after the coiled material is paved and pasted, and performing seam treatment on the coiled material: after cleaning the lap joint part, uncovering the isolating film on the lap joint part of the coiled material and covering and pressing the isolating film on the butt joint part by using a self-adhesive sealing strip;
and (3) rigid roof construction: before the construction of the rigid roof, the roof separation net is arranged according to a drawing, parting is carried out according to the length of 3m multiplied by 3m, and dividing joints are arranged at the turning part of the roof and the joint of the structure of the convex roof;
using fine stone concrete to firstly carry out lapping and bottoming on the root of the parapet wall, and using mortar to carry out surface finishing and press polishing on the surface;
the fine stone concrete waterproof roof is provided with reinforcing mesh sheets, the reinforcing mesh sheets are cut off at the separation seams, and a non-woven fabric isolation layer is laid in a dry mode before the reinforcing mesh sheets are laid;
the large-area rigid surface layer is cast by adopting a skip method, and secondary press polishing is carried out after the concrete receives water;
and (3) installing the reinforced concrete roof 200 for slope finding in the building: cleaning a base layer, paving extruded sheets at staggered joints, sloping light aggregate concrete, leveling cement mortar with the thickness of 20mm being 1:3, and modifying PMC polymer modified cement-based waterproof mortar with the thickness of 2 mm;
laying TPO tape fiber backing type waterproof coiled materials: cleaning a base layer: the base layer is smooth, clean, free of impurities, dry and free of open water, and the insulation board is ensured to be laid smoothly;
construction of a heat insulation layer: cleaning a base layer before heat preservation construction; filling and compacting the pipe root part penetrating through the roof, the wall surface and other structural layers by using pea stone concrete doped with 3% of micro-expanding agent, and fixing the pipe root; after construction, concealed acceptance check, heat preservation and paving, and stable cushion are carried out, the heat preservation layer is paved in a staggered joint way, and the gaps between the plates are densely embedded and filled with chips made of the same materials;
construction of the light aggregate concrete slope layer: when the light aggregate concrete is laid, uniformly laying the concrete on the heat insulation layer;
paving 20 thick 1 after finishing leveling by cement mortar and paving the rock wool heat-insulating board: 3, cement anti-cracking mortar;
the base layer is to be processed to be flat and solid, a proper tool is selected to clean the base layer,
preparing materials: proportioning according to the proportion, wherein the liquid material is as follows: the powder lot is 1: 4;
after the detail node treatment is finished and the coating film is dried, performing the first large-surface coating construction, and uniformly coating the coating film by using ingredients;
after the first coating is fully cured, performing second coating construction, wherein the brushing direction is vertical to the first coating, and after drying, brushing the next coating;
TPO takes fiber backing type waterproofing membrane construction: cleaning a base layer and pre-paving coiled materials: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller;
coil treatment and coil welding: the lap seams of the coiled materials are uniformly welded by using a handheld welding machine or an automatic crawling welding machine, and when the seam of the large-area coiled material is welded by using the automatic crawling welding machine, the seam is compacted by using a handheld silica gel compression roller and is pressed along with welding;
closing the coiled material: after the hot air welding is finished, cooling is carried out, and the trimming edge sealing paste is extruded and coated on the trimming edges of all TPO coiled materials exposed out of the polyester fabric matrix for sealing;
paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method;
the light pressure relief fragile roof 300 is installed: the long edge direction of cement compaction fibreboard panel must be perpendicular with the direction of fossil fragments when laying to make panel width direction's seam staggered arrangement, rock wool heated board installation: utilize rock wool heated board to lay the heat preservation and should pave, fill up steadily, should the fissure of displacement lay when the heat preservation is laid, the piece that the gap between boards used like material inlays to fill closely, the rock wool board process of laying should pop out fossil fragments position line on the heated board, the rock wool heated board is laid and is laid 1 after accomplishing: 3, the anti-crack cement mortar is internally provided with alkali-resistant glass fiber gridding cloth;
TPO takes fiber backing type waterproofing membrane construction, and the coiled material is spread in advance: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller; coil treatment and coil welding: closing the coiled material: after hot air welding is finished, cooling for at least 30 minutes, and extruding and coating trimming sealing paste on the trimming edges of all TPO coiled materials exposed out of the polyester fabric tire bodies for sealing; paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method;
furthermore, in the steel roof girder hoisting step, the steel plate is provided with continuous support in the shape of Chinese character 'ji' around to enhance the vertical rigidity of the bent frame system and the stability of the upright, and the capability of the upright for bearing the load in the vertical direction is improved.
Further, in the construction step of the structural slope finding reinforced concrete roof 200, the base layer is cleaned before heat insulation construction; the pipe root part penetrating through the roof, the wall surface and other structural layers is tightly filled with 3 percent of micro-expanding agent-doped pea gravel concrete, and the pipe root is fixed.
Further, in the construction step of the building slope finding reinforced concrete roof 200, waterproof paint is adopted for multiple times of coating when the head of the coating is folded.
Further, in the coiled material welding step in the installation of the building slope-seeking reinforced concrete roof 200, the temperature of a welding gun is controlled between 250 ℃ and 450 ℃, and the welding speed is 0.2-0.5 m/min.
Further, in the construction step of the slope finding reinforced concrete roof 200, the coating is additionally coated for 2-4 times on the foundation details such as pipe roots, internal and external corners, deformation joints and the like, a layer of reinforced cloth is added at the position where water leakage easily occurs, the coating is firstly uniformly coated once by using a rubber scraper or a paint brush in thickness, the reinforced cloth is immediately pasted for reinforcement treatment, the glass fiber cloth is soaked and paved, a layer of glass fiber cloth is paved at the deformation joint part, then the coating is additionally coated to form an additional layer of empty paving structure, and the paved reinforced cloth is flattened and tightly attached to the lower layer of coating.
Further, in the construction step of the building slope finding reinforced concrete roof 200, the steel roof should be cooled for at least 30 minutes after hot air welding is completed.
Further, in the roof construction step, before the steps of installing the slope-finding reinforced concrete roof 200 and constructing the light pressure-relief fragile roof 300, base layer cleaning is required.
Further, in the construction step of the light pressure-relief fragile roof 300, the rock wool heat-insulation board directly penetrates through the fiber reinforced cement board through the self-tapping heat-insulation nail to be fixed with the steel keel.
The concrete construction method is as follows:
hoisting the steel roof beam:
1) erecting an assembly frame:
(1) considering that the height of the engineering parapet is 25.2 meters, the weight of each beam reaches 14 tons, and the uncontrollable factors of single hoisting are more; according to the research and determination of the department of project, the support and the protective frame are erected and spliced at high altitude according to the actual situation.
(2) The supporting and protecting frame is erected by adopting a phi 48 x 2.8 mm Q235A-grade steel pipe, the whole length from the A shaft to the G shaft is arranged, the height of the supporting frame is 24 meters, the width of the supporting frame is 3 meters, the vertical rods are vertically and horizontally spaced by 1.5 meters, the step distance is 1.5 meters, and the transverse direction of the protecting frame wall connecting piece is two-step three-span; the top of the center of the splicing point of the steel beam is provided with a 15mm steel plate with the thickness of 1000mm and 1000mm, the vertical rods are spaced at 0.45 m vertically and horizontally, and the top of the vertical steel pipe is provided with an adjustable U-shaped jacking support, so that the vertical rods are prevented from generating eccentric stress. The steel plate is provided with continuous support in the shape of Chinese character 'zhi' around to enhance the vertical rigidity of the bent frame system and the stability of the vertical rod, and improve the capability of the vertical rod to bear the load in the vertical direction. The support frame is connected with the frame column in a column-embracing mode along the direction of the frame column, and the two steps are one;
2) hoisting of steel roof beam
(1) The hoisting is carried out by adopting a single crane with a single frame of 250T, the hoisting points are hoisted by adopting two-point binding, and soft materials such as rubber and the like are added at the binding points to prevent the steel roof beams from being damaged.
(2) When the roof truss is hoisted, two ends of the roof truss are respectively sealed by 2 cables, the direction of the cables is vertical to the roof truss, the roof truss is vertically hoisted to be about 300mm away from the ground, after the roof truss is stabilized, the roof truss is rotated to be below a hoisting position, and then the roof truss is slowly hoisted to be raised to the upper chord which is about 300mm higher than the top of the column. After the roof truss is stable, slowly dropping back, aligning the bolt holes of the end plate of the roof truss and the bolt holes of the pre-buried plate by matching an installer with the small prying roller, and penetrating the connecting bolts for connection and fixation.
(3) After the first roof truss (H shaft) is hoisted in place, the first roof truss is connected with a bolt on a protective wall or a cable-pulling wind rope is temporarily fixed.
(4) When the roof truss is installed in place, a three-point plumb bob is adopted for correcting, and a horizontal adjusting rod is adopted for controlling the distance between the steel roof beams and correcting deviation.
(5) After more than 2 roof trusses are installed, the supporting and tie bars are installed to form a stable space for local members, and during construction, the roof supporting and tie bars must be fixed to form a whole.
3) Assembly of steel roof beam
The steel roof girder is divided into two sections along the east-west direction, and the west section can be hoisted only after the east section of the roof girder is hoisted and fixed; in order to ensure the assembling quality, leveling the two ends of the roof truss, the upper chord span, the lower chord span and the main nodes by using a leveling instrument so as to ensure that the assembled roof truss is in a plane; when the position is inaccurate and the east section steel beam needs to be adjusted during assembling, a jack can be adopted for fine adjustment. The coping node is reinforced after the roof truss is spliced, so that the steel beam can not move after being fixed.
Purlin 400 installation:
after all the main steel structures are installed, the roof tie bars and the purlins 400 are installed.
1) The purlin 400 is installed on rigid supports, horizontal supports, column supports and the steel structure main body after the steel structure main body is adjusted.
2) The welding of the purlin support is to mark a line on the steel beam according to the size shown in the figure, and the purlin support is welded and fixed according to the line. The welding positions of the purlin supports in the same row are in a straight line and are vertical to the beam.
3) For roofs with a slope of less than 1:12.5, purlins 400 should be installed with care to eliminate roof straightening caused by beam deflection.
4) The brace between purlins 400 stabilizes purlins 400 and the nuts at each end of the brace on both sides of purlins 400 are tightened during installation to straighten purlins 400.
5) The spacing of the purlines 400 is arranged according to the requirements of construction drawings, the error value is not more than +/-5.0 mm, and the bending rise of the purlines 400 is not more than L/750 mm and is less than 12.0 mm. Checking with a steel ruler and a pull wire.
6) Leveling: the purlins 400 are detected and leveled before installation, the flatness of the purlins 400 is checked one by one, and the height difference between the installed purlins 400 is controlled within the range of +/-5 mm.
7) Line snapping: the supporting points of the purlins 400 are fixed according to the supporting point positions required by design, and for this reason, the supporting points are drawn by using lines, are installed and positioned by the purlins 400, and are checked and accepted according to the arrangement diagram of the purlins 400.
8) Fixing: the purline 400 is installed by a crane or manually in place, then the purline 400 and the purline support 500 on the main steel structure are fixed by bolts by a welding machine, welding or bolt fixing is carried out according to the design requirement, the position is adjusted again before fixing, and the deviation is less than or equal to +/-5 mm.
9) And (4) acceptance: the spacing of the purlines 400 is arranged according to the requirements of construction drawings, the error value is not more than +/-5.0 mm, and the bending rise of the purlines 400 is not more than L/750 mm and is less than 12.0 mm. Checking with a steel ruler and a pull wire.
Purlin 400 installation: in order to improve the efficiency, when the steel roof girder is hoisted, the purlins 400 are packed and then hoisted to the roof according to the using amount of the purlins 400 between every two sections and 8-10 bundles. When the purline is installed, every two persons form a group, the purlines 400 are respectively wound on the two shaft roof trusses, the purlines 400 are lifted to the installation positions to be installed, the purlines 400 are connected through bolts, and the stability outside the plane of the component is guaranteed through the angle braces. Care is taken to ensure the straightness of the purlin 400 during installation;
the structure finds the slope reinforced concrete roofing 200:
1) cleaning a base layer: the base level, clean, no debris, dry no bright water ensure that the heated board is laid and is level and smooth, do not have phenomenons such as sticking up, large tracts of land hollowing.
2) Construction of a heat insulation layer:
(1) the extruded polystyrene foam plastic board with the thickness of 100mm is adopted, the requirements are that the apparent density is 32-38 kg/m3, the compressive strength is more than or equal to 250kPa, the heat conductivity coefficient is less than or equal to 0.03W/m.K, the water absorption rate at normal temperature is less than 1%, and the combustion performance is not lower than B1 level. The heat-insulating material can be put into use after being qualified by retesting.
(2) Cleaning a base layer before heat preservation construction; filling and compacting the pipe root part penetrating through the roof, the wall surface and other structural layers by using pea stone concrete doped with 3% of micro-expanding agent, and fixing the pipe root; and after construction, carrying out concealed acceptance inspection, and carrying out the next procedure after supervision and confirmation.
(3) Laying and heat preservation should be flat and stable, the heat preservation layer should be staggeredly laid when laid, and gaps between plates are densely filled by chips made of the same materials. A temperature seam is arranged between the root of the parapet wall and the heat preservation layer, and the width of the seam is preferably 15-20 mm.
(4) The roof exhausts, exhausts smoke and structures penetrate through the periphery of the heat-insulating layer and the middle part of a large-area roof, and vent holes for releasing moisture of the slope finding layer are reserved every 6m according to a drawing set.
3) C20 fine stone concrete leveling and 1.5mm thick polymer cement waterproof coating
(1) After the extruded polystyrene foam plastic plate is laid, 20-thick C20 fine stone concrete is laid for leveling, and the fine stone concrete is smooth, dry, solid and free of defects such as honeycombs, cracks and the like.
(2) Cleaning the C20 fine stone concrete base layer, wherein floating dust, sundries and bright water cannot be left on the surface;
(3) preparing JS waterproof paint: a specially-assigned person is responsible for batching, and the weight of the liquid material, the powder material and the water are respectively weighed according to the mixing proportion. The mixture is placed in a stirring barrel and stirred uniformly by a hand-held electric stirrer for about 5min generally until the coating does not contain undispersed aggregates.
(4) Coating a bottom waterproof layer: dipping the primer in a rolling brush or a paint brush, and uniformly brushing the primer on a base layer without leaking the primer, wherein the general dosage is 0.3-0.4: kg per square meter. After the coating is dried, the next coating can be brushed.
(5) Coating a detail additional layer: the weak parts such as the pipe root, the internal corner and the external corner, which are easy to leak, are sealed or added with additional layers.
a. Embedding and filling sealing paste: according to design requirements, sealing paste is embedded and filled in grooves or gaps at the tube root and other parts, the embedding and filling are required to be compact, air is prevented from being wrapped in, the sealing paste is firmly bonded with the wall of the gap, and the phenomena of cracks, bulges and tatting cannot occur.
b. Detailed additional layers: a layer of polyester non-woven fabric or low-alkali glass fiber mesh fabric can be laid on the tube root, the internal and external corners and the inlet and outlet positions to serve as an additional reinforcing layer, the width of the non-woven fabric is not less than 300mm, and the lap joint width is not less than l00 mm. When in construction, a paint is coated firstly, and after the additional reinforcing layer is paved, a paint is coated on the additional reinforcing layer.
(6) Painting waterproof paint on the middle and surface layers: and uniformly brushing the prepared JS waterproof paint on the dried coating according to the thickness of the coating required by design, and brushing the JS waterproof paint on the dried coating in the direction perpendicular to the upper coating so as to ensure the uniformity of the thickness of the coating, wherein the dosage of the paint in each time is preferably 0.8-1 kg/square meter, and the thickness of the paint is 1.5mm after 4 times of brushing.
4) Construction of self-adhesive TPO waterproof coiled material
(1) Cleaning and wetting a base layer: and cleaning up dust and impurities on the surface of the base layer by using tools such as a broom, an iron shovel and the like, wherein the dry base surface needs to be sprayed with water in advance for wetting, but no accumulated water is left.
(2) Smearing cement paste: the thickness of the base layer is determined according to the leveling condition of the base layer, and the base layer is compacted and leveled when being paved.
And a fillet with the radius of more than 50mm is smeared at the internal corner. The width of the spreading cement paste is preferably 100-300 mm wider than the length and the short edge of the coiled material, and the flatness is ensured in the spreading process.
And (3) node strengthening treatment: firstly, making an additional layer at a node part (such as a male and female corner, a construction joint, a post-cast strip, a deformation joint and a wall-penetrating pipeline), wherein the width of the additional layer is 500mm, and the purpose of pressing the lower edge of the parapet wall by the parapet wall is realized by flashing;
paving and pasting the waterproof roll material in a large area: and removing the isolation film on the lower surface of the waterproof roll to lay the roll on the cement mortar. The coiled materials are in parallel butt joint with the adjacent coiled materials, and the waterproof coiled materials are laid in the direction parallel to the short edge direction of the roof from high to low according to the actual situation on site and the water direction according to the laying plan of the waterproof coiled materials. The longitudinal lapping width of the coiled material, the lapping of the long side and the short side should not be less than 100 mm;
(5) slurry extraction: and beating the upper surface of the coiled material by using a wooden trowel or a rubber plate to remove air below the coiled material, extracting slurry and discharging the air below the coiled material, so that the coiled material is tightly combined with the slurry.
(6) And (5) maintenance: and maintaining for 48 hours after the coiled materials are paved.
(7) And (3) seam treatment of the coiled material: after the lap joint part is cleaned up, the isolating film on the lap joint part of the coiled material is uncovered and is covered and pressed on the butt joint part by a self-adhesive sealing strip.
5) And (3) rigid roof construction:
(1) the method is characterized in that the roof separation net is arranged according to a drawing before the construction of the rigid roof, parting is carried out according to the drawing requirement and 3m multiplied by 3m, dividing joints are arranged at the turning part of the roof and the joint of the convex roof structure, and the width of the dividing joint is 15 mm.
(2) The root of the parapet wall is firstly paved with fine stone concrete and bottomed to reach the required strength and thickness, and the surface is plastered and polished by mortar.
(3) The fine stone concrete waterproof roof is provided with A6@150 reinforcing steel bar meshes, and the positions of the fine stone concrete waterproof roof are preferably placed in the middle. The steel bar net sheets are broken at the separation seams, the steel bar protection layers are not smaller than 15mm, and a 200 g-weight non-woven fabric isolation layer is laid in a dry mode before the steel bar net sheets are laid.
(4) The large-area rigid surface layer is poured by adopting a skip method, the slope of the fine aggregate concrete must meet the drainage requirement during construction, no water is accumulated, and the fine aggregate concrete can be inspected by a slope ruler or watered for observation. After the concrete receives water, secondary press polishing is carried out to cut and seal capillary tubes in the concrete and improve impermeability. When the surface layer is plastered, the surface is strictly prevented from being watered, and cement slurry is added or dry cement is spread to prevent cracking and peeling and reduce the waterproof effect. The concrete curing time is not less than 14 hours;
the building slope finding reinforced concrete roof 200:
base course cleaning → 100mm thick extruded sheet staggered joint laying → light aggregate concrete slope finding → 20mm thick 1:3 cement mortar leveling → 2mm thick PMC polymer modified cement-based waterproof mortar → 1.6mm thick TPO belt fiber backing type waterproof coiled material laying
1) Cleaning a base layer: the base level, clean, no debris, dry no bright water ensure that the heated board is laid and is level and smooth, do not have phenomenons such as sticking up, large tracts of land hollowing.
2) Construction of heat-insulating layer
(1) The extruded polystyrene foam plastic board with the thickness of 100mm is adopted, the requirements are that the apparent density is 32-38 kg/m3, the compressive strength is more than or equal to 250kPa, the heat conductivity coefficient is less than or equal to 0.03W/m.K, the water absorption rate at normal temperature is less than 1%, and the combustion performance is not lower than B1 level.
(2) Cleaning a base layer before heat preservation construction; the pipe root part penetrating through the roof, the wall surface and other structural layers is tightly filled with 3 percent of micro-expanding agent-doped pea gravel concrete, and the pipe root is fixed.
(3) Laying and heat preservation should be flat and stable, the heat preservation should be laid in a staggered joint mode when laid, gaps among the plates are embedded and filled densely by chips made of the same materials, a temperature seam should be arranged between the root of the parapet wall and the heat preservation, and the width of the seam is preferably 15-20 mm.
(4) The roof exhausts, exhausts smoke and structures penetrate through the periphery of the heat-insulating layer and the middle part of a large-area roof, and vent holes for releasing moisture of the slope finding layer are reserved every 6m according to a drawing set.
3) Construction of light aggregate concrete slope layer
(1) The heat preservation quality needs to be checked according to requirements before the construction of the slope layer, if the heat preservation layer is damaged, the hollowing position is repaired immediately. Before construction, according to the drainage slope direction of the roof and the position of a drainage outlet, an elevation control line is bounced at the side of the parapet wall, rib punching is carried out one day in advance, and the thinnest position is not less than 3 cm.
(2) When the light aggregate concrete is laid, the concrete is uniformly laid on the heat preservation layer by using a spade, the heat preservation layer is not damaged, the virtual laying thickness is slightly higher than the forming thickness, and the compaction is ensured along with rolling by using a special roller.
(3) The root of the embedded pipe, the parapet wall, the heating ditch wall and other yin-yang corners are made into circular arcs with the radius of 50mm so as to be beneficial to waterproof layer construction; the gradient of the leveling layer needs to be accurately controlled, and the flooding is strictly forbidden.
(4) And (5) watering and maintaining immediately after construction.
4) Cement mortar leveling
Lay 20 thick 1 after the completion is laid to rock wool heated board: 3, cement anti-cracking mortar. When the cement anti-crack mortar is constructed, the finished surface of the mortar needs to be flat, dry, solid and free of defects such as honeycombs and cracks, chips and foreign matters on a base layer need to be removed before the coiled material is laid, and a dust collector or a high-pressure dust blower is used for blowing clean when necessary.
5) PMC polymer modified cement-based waterproof mortar with thickness of 2mm
(1) Cleaning a base layer: the base layer is flat and solid, a proper tool is selected to clean the base layer, floating dust and impurities cannot be generated on the surface of the base layer, sharp objects cannot be protruded, and oil stains must be removed completely.
(2) Preparing materials: the liquid material, powder and water in the proportion marked on the product specification are proportioned, and the liquid material is generally as follows: the powder lot is 1: 4. the addition amount of water can be properly adjusted to adjust the consistency of the finish coating, so as to meet the construction requirements of different parts of the vertical surface and the plane; the mortar mixing method is that the liquid material and water are poured into a stirring barrel, the powder material is slowly added into the stirring barrel under the continuous stirring of a hand-held stirrer, and the stirring is carried out for at least 5 minutes, and the mixture is thoroughly stirred uniformly and is in a slurry state without lumps.
(3) Waterproof layer construction is firstly carried out on the foundation details such as pipe roots, internal and external corners, deformation joints and the like, 2-4 times of coating (the thickness is 1mm) can be additionally coated, and a layer of reinforced cloth is additionally arranged on the part which is easy to leak water for reinforcement treatment. Firstly, uniformly brushing the coating once by using a rubber scraper or a paint brush, wherein the brushing width is preferably 300mm, and immediately pasting a reinforcement cloth for reinforcement treatment. When the glass fiber cloth is additionally paved, the glass fiber cloth must be soaked, a layer of glass fiber cloth is paved on the deformation joint part, and then the coating is added to form an additional layer empty paving structure. When the reinforced cloth is pasted, a paint brush is used for spreading and flattening, the coated cloth is tightly attached to the lower layer of coating, the lap joint width is 100mm, and one to two layers of coating are coated on the surface of the coated cloth to enable the coated cloth to reach the thickness required by the design.
(4) And after the detail node treatment is finished and the coating film is dried, performing the first construction of the large-surface coating. The mixture is evenly coated by a rubber or plastic scraper, the required thickness is consistent, the coating is even, and the local deposition cannot be caused.
(5) After the first coating is fully cured (generally at an interval of 2h, generally based on no hand sticking), the second coating is constructed, the brushing direction is perpendicular to the first coating, and the next coating is coated after drying until the design thickness is reached. Coating with waterproof paint for several times to ensure the perfect waterproof effect;
6) construction of TPO (thermoplastic polyolefin) tape fiber backing type waterproof coiled material
(1) Cleaning a base layer: the surface of the base layer is clean and has no dust, so that the firm bonding between the coiled material and the base layer is ensured.
(2) Pre-paving the coiled material: firstly, a datum line is placed according to the shape of a construction site, a naturally relaxed coiled material is arranged on a base layer along the datum line, the coiled material is flat and vertical and cannot be twisted, the coiled material is folded according to the shape of the node for the node part needing bonding, matched adhesives are respectively coated at the folded part of the coiled material and the surface of the base layer, when the base layer adhesive is dried to be not sticky, bonding operation is carried out, and a compression roller is used for compacting, so that the base layer is firmly bonded. In the operation process, the base layer adhesive is not coated on the lap seam part to be welded by hot air.
(3) Treating a coiled material: before welding the lap joint of the TPO coiled material, the surface of the seam of the coiled material must meet the clean requirement, the surface has no water drops, oil stains and dirt, and for the lap joint of the coiled material which is polluted by the dirt on site, a matched cleaning agent or clean water is applied to clean the lap joint, and the lap joint is wiped by clean cloth.
(4) Welding coiled materials: the hand-held welding machine or the automatic crawling welding machine is used for uniformly welding the lap joints of the coiled materials, the lap joint width meets the requirement, and when the automatic crawling welding machine is used for welding the joints of the large-area coiled materials, the pressure, the temperature and the welding crawling speed of the welding machine are determined according to the temperature and the humidity of a construction site. When manual welding operation is carried out, the temperature of a handheld welding gun is controlled to be between 250 and 450 ℃, the welding speed is 0.2-0.5m/min, and the handheld silica gel compression roller is used for compacting during welding and is pressed along with welding.
(5) Closing the coiled material: and after the hot air welding is finished, cooling for at least 30 minutes, and extruding and coating trimming sealing paste on the trimming edges of all TPO coiled materials exposed out of the polyester fabric tire body for sealing.
(6) For a TPO coiled material waterproof layer on a vertical surface base layer, a full-adhesion method is adopted in principle. The facade base layer is dry, solid, flat and clean, has no water caltrop and sharp sundries, meets the bonding requirement, and has the same construction method as the plane full-bonding method;
light pressure relief fragile roof 300
1) The light steel keel is made of 40-60-3 square steel, the spacing between the laid keels is 40.7mm, the spacing between the seam keels is 1220mm, the light steel keel is fixed with the purline 400 through spot welding after vertical adjustment and accurate positioning, and then full welding is carried out.
2) Double layer 18mm thick fiber reinforced cement board (light and fragile) installation
(1) The long edge direction of the cement compacted fiber board is required to be vertical to the direction of the keel when the cement compacted fiber board is laid, the joints in the width direction of the board are arranged in a staggered mode, screws are 15mm away from the board edge, and the screw spacing is about 180-200 mm away from the board corner at the position 50mm away from the board corner.
(2) Before the plate is closed, lines are bounced on the plate surface according to the grids of the keels, and a shallow pit is pre-drilled at the position where the nail head penetrates through the plate, so that the plate surface is smooth after the screws are installed; and the screw head is sunk into the cement fiber board and is not more than 0.5mm lower than the board surface of the cement fiber board, and the fixing plate starts from the middle and then is fixed at the periphery.
(3) The project adopts a double-layer cement compacting plate, and staggered joints need to be paved.
3) Rock wool insulation board installation
(1) The heat-insulating layer adopts a rock wool heat-insulating plate with the thickness of 100, and the dry density is required to be more than or equal to 150kg/m3The compression strength is more than or equal to 40kPa, the heat conductivity coefficient is less than or equal to 0.03W/m.K, the water absorption rate at normal temperature is less than 1 percent, the combustion performance is not lower than grade A, and the hydrophobicity is more than or equal to 98 percent. The heat-insulating material can be put into use after being qualified by retesting.
(2) Laying and heat preservation should be flat and stable, the heat preservation layer should be staggeredly laid when laid, and gaps between plates are densely filled by chips made of the same materials.
(3) The rock wool board should pop out fossil fragments position line on the heated board in the process of laying, and the rock wool heated board is fixed with the steel joist through self tapping type heat preservation nail straight-through fiber reinforcement cement board, and the staple quantity is not less than 8/square meter.
4) Cement mortar leveling
Lay 20 thick 1 after the completion is laid to rock wool heated board: 3, the anti-crack cement mortar is internally provided with alkali-resistant glass fiber gridding cloth. When the cement anti-crack mortar is constructed, the finished surface of the mortar needs to be flat, dry, solid and free of defects such as honeycombs and cracks, chips and foreign matters on a base layer need to be removed before the coiled material is laid, and a dust collector or a high-pressure dust blower is used for blowing clean when necessary.
5) Construction of TPO (thermoplastic polyolefin) tape fiber backing type waterproof coiled material
(1) Cleaning a base layer: the surface of the base layer is clean and has no dust, so that the firm bonding between the coiled material and the base layer is ensured.
(2) Pre-paving the coiled material: firstly, a datum line is placed according to the shape of a construction site, a naturally relaxed coiled material is arranged on a base layer along the datum line, the coiled material is flat and vertical and cannot be twisted, the coiled material is folded according to the shape of the node for the node part needing bonding, matched adhesives are respectively coated at the folded part of the coiled material and the surface of the base layer, when the base layer adhesive is dried to be not sticky, bonding operation is carried out, and a compression roller is used for compacting, so that the base layer is firmly bonded. In the operation process, the base layer adhesive is not coated on the lap seam part to be welded by hot air.
(3) Treating a coiled material: before welding the lap seam of TPO coiled material, the surface of the seam of the coiled material must meet the clean requirement, and the surface has no water drop, oil stain and dirt. And (3) for the lap joint of the coiled material contaminated with on-site dirt, cleaning the lap joint by using a matched cleaning agent or clean water, and wiping the lap joint by using clean cloth.
(4) Welding coiled materials: the hand-held welding machine or the automatic crawling welding machine is used for uniformly welding the lap joints of the coiled materials, and the lap joint width is ensured to meet the requirement. When an automatic welding crawling welding machine is used for welding joints of large-area coiled materials, the pressure, the temperature and the welding crawling speed of the welding machine are determined according to the temperature and the humidity of a construction site. When manual welding operation is carried out, the temperature of a handheld welding gun is controlled to be between 250 and 450 ℃, the welding speed is 0.2-0.5m/min, and the handheld silica gel compression roller is used for compacting during welding and is pressed along with welding.
(5) Closing the coiled material: and after the hot air welding is finished, cooling for at least 30 minutes, and extruding and coating trimming sealing paste on the trimming edges of all TPO coiled materials exposed out of the polyester fabric tire body for sealing.
(6) For a TPO coiled material waterproof layer on a vertical surface base layer, a full-adhesion method is adopted in principle. The facade base layer is dry, solid, flat and clean, has no water caltrop and sharp sundries, meets the bonding requirement, and has the same construction method as the plane full-bonding method.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (9)

1. The construction method of the steel structure pressure relief roof is characterized by comprising the following steps of: the construction method comprises the steps of steel structure main body construction and roof construction, wherein the steel structure hoisting step comprises a splicing frame erection step, a steel roof beam hoisting step, a steel roof beam splicing step and a purline construction step; the roof construction step comprises the steps of installing a structural slope-finding reinforced concrete roof, installing a building slope-finding reinforced concrete roof and installing a light pressure-relief fragile roof;
erecting an assembly frame: the support protection frame is erected by adopting a steel pipe, and the protection frame wall connecting piece is transversely two-step and three-span; the top of the center of the splicing point of the steel beam is provided with a steel plate, the vertical rods are arranged at equal intervals in the longitudinal and transverse directions, the top of the vertical steel tube is provided with an adjustable U-shaped jacking, and the support frame is connected with the frame column in a column embracing mode along the direction of the frame column, so that one step is performed;
hoisting the steel roof beam: after the first roof truss is hoisted in place, the first roof truss is connected with a bolt on a protective wall or temporarily fixed by a cable-drawing wind rope, and after more than two roof trusses are installed, a supporting rod and a tie rod are installed;
assembling the steel roof beam: the steel roof girder is divided into two sections along the east-west direction, and the west section can be hoisted only after the east section of the roof girder is hoisted and fixed;
purline construction: rigid support, horizontal support, purlin installation after the inter-column support is installed, and steel structure main body adjustment and calibration are carried out, the welding of purlin support is carried out on the steel beam according to the marking position of the size shown in the figure, and the purlin support is welded and fixed according to the line
The welding positions of the purlin supports in the same row are on the same straight line and are vertical to the beam, and for the roof with the gradient less than 1:12.5, the phenomenon of uneven roof caused by beam deflection is eliminated when the purlin is installed;
the brace between the purlins has a stabilizing effect on the purlins, and nuts at each end of the brace on two surfaces of the purlins are screwed during installation so as to straighten the purlins;
fixing: mounting a selective crane or manually positioning the purlines, fixing the purlines and purline supporting pieces on the main steel structure by bolts by using a welding machine, welding or fixing the purlines by bolts according to design requirements, and adjusting the positions of the purlines before fixing;
the structure is used for slope finding and reinforced concrete roof installation: cleaning a base layer and constructing a heat insulation layer: an extruded polystyrene foam plastic plate is used for laying a heat-insulating layer, exhausting air and smoke from a roof and enabling a structure to penetrate through the periphery of the heat-insulating layer and the middle part of a large-area roof, and vent holes for releasing moisture of a slope finding layer are reserved every 6 m; c20 fine stone concrete leveling, 1.5mm thick polymer cement waterproof paint, 20 thick C20 fine stone concrete leveling after the extrusion molding polystyrene foam plastic board is paved; coating a bottom waterproof layer: dipping the primer with a rolling brush or a paintbrush, and uniformly brushing the primer on the base layer;
coating a detail additional layer: sealing or adding additional layers including embedding sealing paste and additional layers of details on weak parts such as pipe roots, internal corners and external corners which are easy to leak;
self-adhesion type TPO waterproofing membrane construction, including basic unit's clearance, smear grout, node enhancement processing, carry thick liquid, maintenance: maintaining for 48 hours after the coiled material is paved and pasted, and performing seam treatment on the coiled material: after cleaning the lap joint part, uncovering the isolating film on the lap joint part of the coiled material and covering and pressing the isolating film on the butt joint part by using a self-adhesive sealing strip;
and (3) rigid roof construction: before the construction of the rigid roof, the roof separation net is arranged according to a drawing, parting is carried out according to the length of 3m multiplied by 3m, and dividing joints are arranged at the turning part of the roof and the joint of the structure of the convex roof;
using fine stone concrete to firstly carry out lapping and bottoming on the root of the parapet wall, and using mortar to carry out surface finishing and press polishing on the surface;
the fine stone concrete waterproof roof is provided with reinforcing mesh sheets, the reinforcing mesh sheets are cut off at the separation seams, and a non-woven fabric isolation layer is laid in a dry mode before the reinforcing mesh sheets are laid;
the large-area rigid surface layer is cast by adopting a skip method, and secondary press polishing is carried out after the concrete receives water;
and (3) building slope finding reinforced concrete roof installation: cleaning a base layer, paving extruded sheets at staggered joints, sloping light aggregate concrete, leveling cement mortar with the thickness of 20mm being 1:3, and modifying PMC polymer modified cement-based waterproof mortar with the thickness of 2 mm;
laying TPO tape fiber backing type waterproof coiled materials: cleaning a base layer: the base layer is smooth, clean, free of impurities, dry and free of open water, and the insulation board is ensured to be laid smoothly;
construction of a heat insulation layer: cleaning a base layer before heat preservation construction; filling and compacting the pipe root part penetrating through the roof, the wall surface and other structural layers by using pea stone concrete doped with 3% of micro-expanding agent, and fixing the pipe root; after construction, concealed acceptance check, heat preservation and paving, and stable cushion are carried out, the heat preservation layer is paved in a staggered joint way, and the gaps between the plates are densely embedded and filled with chips made of the same materials;
construction of the light aggregate concrete slope layer: when the light aggregate concrete is laid, uniformly laying the concrete on the heat insulation layer;
paving 20 thick 1 after finishing leveling by cement mortar and paving the rock wool heat-insulating board: 3, cement anti-cracking mortar;
the base layer is to be processed to be flat and solid, a proper tool is selected to clean the base layer,
preparing materials: proportioning according to the proportion, wherein the liquid material is as follows: the powder lot is 1: 4;
after the detail node treatment is finished and the coating film is dried, performing the first large-surface coating construction, and uniformly coating the coating film by using ingredients;
after the first coating is fully cured, performing second coating construction, wherein the brushing direction is vertical to the first coating, and after drying, brushing the next coating;
TPO takes fiber backing type waterproofing membrane construction: cleaning a base layer and pre-paving coiled materials: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller;
coil treatment and coil welding: the lap seams of the coiled materials are uniformly welded by using a handheld welding machine or an automatic crawling welding machine, and when the seam of the large-area coiled material is welded by using the automatic crawling welding machine, the seam is compacted by using a handheld silica gel compression roller and is pressed along with welding;
closing the coiled material: after the hot air welding is finished, cooling is carried out, and the trimming edge sealing paste is extruded and coated on the trimming edges of all TPO coiled materials exposed out of the polyester fabric matrix for sealing;
paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method;
and (3) mounting the light pressure-relief fragile roof: the long edge direction of cement compaction fibreboard panel must be perpendicular with the direction of fossil fragments when laying to make panel width direction's seam staggered arrangement, rock wool heated board installation: utilize rock wool heated board to lay the heat preservation and should pave, fill up steadily, should the fissure of displacement lay when the heat preservation is laid, the piece that the gap between boards used like material inlays to fill closely, the rock wool board process of laying should pop out fossil fragments position line on the heated board, the rock wool heated board is laid and is laid 1 after accomplishing: 3, the anti-crack cement mortar is internally provided with alkali-resistant glass fiber gridding cloth;
TPO takes fiber backing type waterproofing membrane construction, and the coiled material is spread in advance: arranging the naturally relaxed coiled material on a base layer along a datum line, folding the coiled material at a node position needing bonding according to the node shape, respectively coating matched adhesives at the folded position of the coiled material and the surface of the base layer, and compacting by using a press roller; coil treatment and coil welding: closing the coiled material: after hot air welding is finished, cooling for at least 30 minutes, and extruding and coating trimming sealing paste on the trimming edges of all TPO coiled materials exposed out of the polyester fabric tire bodies for sealing; and paving a TPO coiled material waterproof layer on the vertical surface base layer by adopting a full-adhesion method.
2. The construction method of the steel structure pressure relief roof covering according to claim 1, characterized in that in the steel roof girder hoisting step, continuous zigzag supports are arranged around the steel plates to enhance the vertical rigidity of the bent frame system and the stability of the vertical rods, and the vertical load bearing capacity of the vertical rods is improved.
3. The construction method of the steel structure pressure relief roof as claimed in claim 1, wherein in the step of constructing the steel reinforced concrete roof by the structure slope finding, the base layer is cleaned before heat preservation construction; the pipe root part penetrating through the roof, the wall surface and other structural layers is tightly filled with 3 percent of micro-expanding agent-doped pea gravel concrete, and the pipe root is fixed.
4. The construction method of the steel structure pressure relief roof as claimed in claim 1, wherein in the step of building slope finding reinforced concrete roof construction, the coating is applied with waterproof paint for many times.
5. The construction method of the steel structure pressure relief roof as claimed in claim 1, wherein in the step of welding the coiled material in the installation of the steel reinforced concrete roof for building slope seeking, the temperature of the welding gun is controlled between 250 ℃ and 450 ℃, and the welding speed is 0.2-0.5 m/min.
6. The method as claimed in claim 1, wherein in the step of constructing the slope-finding reinforced concrete roof, the base details of the pipe root, the internal and external corners, the deformation joints and the like are additionally coated with 2-4 times of coating, a layer of reinforced cloth reinforcement treatment is added to the part which is easy to leak water, the coating is uniformly coated once by using a rubber scraper or a paint brush, the reinforced cloth is immediately adhered to the part for reinforcement treatment and glass fiber cloth soaking and paving, a layer of glass fiber cloth is firstly paved at the deformation joint part, then the coating is added to form an additional layer of empty paving structure, and the reinforced cloth is spread and flattened and is tightly attached to the lower layer of coating.
7. The construction method of the steel structure pressure relief roof as claimed in claim 1, wherein in the step of constructing the slope finding reinforced concrete roof, the steel structure pressure relief roof should be cooled for at least 30 minutes after the hot air welding is completed.
8. The construction method of the steel structure pressure relief roof as claimed in claim 1, wherein in the roof construction step, a base layer is required to be cleaned before the steps of slope finding reinforced concrete roof installation and light pressure relief fragile roof construction are carried out on the building.
9. The construction method of the steel structure pressure relief roof covering according to claim 1, wherein in the construction step of the light pressure relief fragile roof covering, the rock wool heat-insulation board is fixed with the steel keel by penetrating through the fiber reinforced cement board through self-tapping heat-insulation nails.
CN202111089175.0A 2021-09-16 2021-09-16 Construction method for steel structure pressure relief roof Active CN113931384B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111089175.0A CN113931384B (en) 2021-09-16 2021-09-16 Construction method for steel structure pressure relief roof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111089175.0A CN113931384B (en) 2021-09-16 2021-09-16 Construction method for steel structure pressure relief roof

Publications (2)

Publication Number Publication Date
CN113931384A true CN113931384A (en) 2022-01-14
CN113931384B CN113931384B (en) 2022-12-27

Family

ID=79276039

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111089175.0A Active CN113931384B (en) 2021-09-16 2021-09-16 Construction method for steel structure pressure relief roof

Country Status (1)

Country Link
CN (1) CN113931384B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114718249A (en) * 2022-05-24 2022-07-08 中交第四公路工程局有限公司 Waterproof heat preservation integration board of steel construction roofing
CN115233914A (en) * 2022-09-08 2022-10-25 中建八局第二建设有限公司 Roof parking apron steel structure foundation drainage waterproof structure and construction method thereof
CN117627376A (en) * 2024-01-25 2024-03-01 北京建工集团有限责任公司 Integral installation construction method for modularized steel girder and purline
CN114718249B (en) * 2022-05-24 2024-04-26 中交第四公路工程局有限公司 Waterproof heat preservation integrated plate of steel construction roofing

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB376259A (en) * 1931-03-28 1932-06-28 James Hardress De Warrenne Wal A method of and means for building with reinforced concrete, cement, plaster, or the like
CN104806017A (en) * 2015-04-22 2015-07-29 中国十七冶集团有限公司 Construction method of assembly type reinforced concrete waterproof roof
CN108442598A (en) * 2018-04-12 2018-08-24 青岛博海建设集团有限公司 Rack and steel truss light composite board Combined roof construction
CN110670798A (en) * 2019-10-14 2020-01-10 中化二建集团有限公司 Construction method of explosion-proof pressure-relief wall body of large industrial factory building
CN112681624A (en) * 2020-12-21 2021-04-20 上海宝冶集团有限公司 Construction method of roof planted in independent basement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB376259A (en) * 1931-03-28 1932-06-28 James Hardress De Warrenne Wal A method of and means for building with reinforced concrete, cement, plaster, or the like
CN104806017A (en) * 2015-04-22 2015-07-29 中国十七冶集团有限公司 Construction method of assembly type reinforced concrete waterproof roof
CN108442598A (en) * 2018-04-12 2018-08-24 青岛博海建设集团有限公司 Rack and steel truss light composite board Combined roof construction
CN110670798A (en) * 2019-10-14 2020-01-10 中化二建集团有限公司 Construction method of explosion-proof pressure-relief wall body of large industrial factory building
CN112681624A (en) * 2020-12-21 2021-04-20 上海宝冶集团有限公司 Construction method of roof planted in independent basement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114718249A (en) * 2022-05-24 2022-07-08 中交第四公路工程局有限公司 Waterproof heat preservation integration board of steel construction roofing
CN114718249B (en) * 2022-05-24 2024-04-26 中交第四公路工程局有限公司 Waterproof heat preservation integrated plate of steel construction roofing
CN115233914A (en) * 2022-09-08 2022-10-25 中建八局第二建设有限公司 Roof parking apron steel structure foundation drainage waterproof structure and construction method thereof
CN117627376A (en) * 2024-01-25 2024-03-01 北京建工集团有限责任公司 Integral installation construction method for modularized steel girder and purline

Also Published As

Publication number Publication date
CN113931384B (en) 2022-12-27

Similar Documents

Publication Publication Date Title
CN113931384B (en) Construction method for steel structure pressure relief roof
CN104358341B (en) Building brickwork and masonry construction method of building brickwork
CN106499091A (en) A kind of assembling type partition wall construction method based on ALC plates
CN111734126B (en) Single-curved-surface fair-faced concrete textured roof template system and construction method thereof
CN110094020A (en) A kind of water-proof roofing constructing device and construction method
CN104594387A (en) Improved post-pouring strip advanced water-stopping construction method
CN110080530B (en) Anchoring construction method for glazed tile slope roof in severe cold region
CN106801517A (en) A kind of schoolhouse surface consolidation of Prefabricated porous plate brick mixed structure strengthens method
CN102776897A (en) Wash apron anti-settling anti-cracking construction method and structure
CN110778062A (en) Facing paving structure of floor heating area and construction method thereof
CN113622452A (en) Construction method of refrigeration house terrace and refrigeration house terrace
CN112282294A (en) Construction method of steel fiber wear-resistant terrace
CN114876117A (en) Multi-gradient planting roof structure and construction method thereof
CN111305399A (en) Basement outer wall post-cast strip system and construction method thereof
CN112412008A (en) Seamless construction method for accurate slope finding of super-large concrete flat roof structure
CN112695959A (en) Passive heat-bridge-free slope roof 300 mm-thick heat-insulation and decoration integrated construction process
CN113914530B (en) Inclined roof fish scale type concrete structure and construction method
CN104929322A (en) Roofing rigid waterproof layer structure and construction method thereof
CN114876075A (en) Water seepage prevention construction method for garage top plate
CN108083740A (en) Mortar and the two-in-one compound material of putty and preparation method thereof
CN113266035A (en) Construction method for upper structure of steam turbine base
CN111576788A (en) Construction method for ground leveling
CN112302045A (en) Construction method of foundation beam side vertical face waterproof structure
CN219909641U (en) Butterfly tile hanging and lying combined system for sloping roof
CN214659212U (en) Large anti-cracking thin-wall water pool

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: No. 114 South Street, Jiaotoukou, Dongcheng District, Beijing, 100010

Applicant after: CCCC Construction Group Co.,Ltd.

Address before: No. 114 South Street, Jiaotoukou, Dongcheng District, Beijing, 100010

Applicant before: CCCC FOURTH HIGHWAY ENGINEERING Co.,Ltd.

GR01 Patent grant
GR01 Patent grant