CN113529962A - Construction method of recycled concrete modularized integrated house - Google Patents
Construction method of recycled concrete modularized integrated house Download PDFInfo
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- CN113529962A CN113529962A CN202110931453.6A CN202110931453A CN113529962A CN 113529962 A CN113529962 A CN 113529962A CN 202110931453 A CN202110931453 A CN 202110931453A CN 113529962 A CN113529962 A CN 113529962A
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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
- E04B1/343—Structures characterised by movable, separable, or collapsible parts, e.g. for transport
- E04B1/34315—Structures characterised by movable, separable, or collapsible parts, e.g. for transport characterised by separable parts
- E04B1/34321—Structures characterised by movable, separable, or collapsible parts, e.g. for transport characterised by separable parts mainly constituted by panels
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/04—Mats
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/02—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant
- E04D3/04—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant of concrete or ceramics
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- Architecture (AREA)
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- Chemical & Material Sciences (AREA)
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- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a construction method of a recycled concrete modularized integrated house, which comprises the following steps: the method comprises the following steps of prefabricating a wall body, a filled wallboard and a roof panel by using recycled concrete, wherein a door and window frame opening and a wallboard frame opening are reserved on the wall body; the wall body is arranged to form a wall on a construction site, the filling wallboard is embedded in a wallboard frame opening in a regenerated concrete strip mode, the roof board is connected with the top of the wall body through cast-in-place regenerated concrete, and the corner columns and the frame beams are connected with the wall body through cast-in-place regenerated concrete. The building method of the recycled concrete modularized integrated house provided by the invention provides a utilization way for recycling building waste on one hand, overcomes the defects of the existing modularized house on the other hand, is not easy to cause potential safety hazards, and has high popularization value.
Description
Technical Field
The invention belongs to the technical field of modular buildings, and relates to a construction method of a recycled concrete modular integrated house.
Background
In the development process of the modern society, the problems caused by construction wastes generated by the conditions of removal, construction, land development and the like are increasingly prominent. The treatment mode of the construction waste such as waste concrete is mainly stacking and burying, so that a large amount of waste concrete not only occupies precious land resources, but also causes a series of social problems such as environmental protection and ecology. Correspondingly, the continuous exploitation of a large amount of natural sandstone aggregate leads to the exhaustion of sandstone resources in part of regions, and the long-distance transportation of materials such as sandstone aggregate is required, so that the cost is continuously increased, and the environmental pollution is also aggravated. The recycled concrete technology, which is a technology for recycling a large amount of waste concrete, is currently considered as an effective measure for solving the problem of waste concrete treatment. The waste concrete is crushed, cleaned, graded and matched according to a certain proportion to obtain the recycled aggregate, and is used for preparing the recycled aggregate concrete, so that the problem of disposal of the waste concrete is solved, the sandstone resource is saved, and the purposes of resource recycling and environment protection are achieved on the premise of ensuring the construction quality.
On the other hand, in our country, modular houses have begun to gradually move into the field of vision of people. The modular house is born in the last 50 th century, and particularly relates to a house construction mode which is characterized in that components such as beams and columns, walls, roofs and the like are prefabricated in factories in a standardized, modularized and generalized mode according to use requirements and can be quickly assembled on a use site. The modularized integrated house has the advantages of easy disassembly, convenient installation, convenient transportation and storage, and the like, and can be repeatedly used and circulated for many times. The modular house is widely applied to temporary offices and dormitories of construction sites, and rooms for large-scale field exploration and field operation construction of traffic, water conservancy, petroleum, natural gas and the like, and is mainly structurally characterized in that a bearing structure in a steel structure form is adopted, so that the problem that potential safety hazards are easily caused due to unstable connection structures during use is solved. In addition, the steel structure modular house has the phenomenon that the user experiences poorly in living, mainly shows that the heat preservation performance is poor, the sound insulation effect is poor, rainwater hits the problem that roof boarding noise is big etc. influences the daily user demand of living of user.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a method for constructing a recycled concrete modularized integrated house, which adopts a standardized and modularized design, is not prone to installation errors, has a stable connection structure, is not prone to potential safety hazards, solves the problems of unstable connection structure and poor user living experience of the existing modularized house, and provides a utilization way for recycling building waste.
To achieve the above and other related objects, a first aspect of the present invention provides a recycled concrete modular integrated house construction method, comprising: the method comprises the following steps of prefabricating a wall body, a filled wallboard and a roof panel by using recycled concrete, wherein a door and window frame opening and a wallboard frame opening are reserved on the wall body; the wall body is arranged to form a wall on a construction site, the filling wallboard is embedded in a wallboard frame opening in a regenerated concrete strip mode, the roof board is connected with the top of the wall body through cast-in-place regenerated concrete, and the corner columns and the frame beams are connected with the wall body through cast-in-place regenerated concrete.
Preferably, the strength of the recycled concrete is more than or equal to grade C30.
Preferably, the recycled concrete has a recycled coarse aggregate substitution rate of 30-50%.
The recycled concrete is novel concrete prepared by mixing waste concrete according to a certain proportion after crushing and screening, and partially or completely replacing natural aggregate.
The recycled aggregate substitution rate is a rate at which the recycled aggregate is partially or completely substituted for the natural aggregate. Namely, when the replacement ratio of the recycled coarse aggregate is 0%, the recycled concrete is natural concrete.
More preferably, the recycled concrete comprises the following components in parts by weight: cement 290-300 parts; 70-80 parts of fly ash; 600 portions and 620 portions of sand; 618 parts of natural coarse aggregate; 265 portions of II-class recycled coarse aggregate and 618 portions; 3-4 parts of a water reducing agent; 130 portions of water and 150 portions of water.
Further preferably, the recycled concrete comprises the following components in parts by weight: 296 parts of cement; 74 parts of fly ash; 609 parts of sand; 618 parts of natural coarse aggregate; 618 parts of II-class recycled coarse aggregate; 3.7 parts of a water reducing agent; 140 parts of water.
Further preferably, the cement is portland cement.
Further preferably, the strength of the cement is PO 42.5.
Further preferably, the fly ash is a class I fly ash. The quality of the fly ash meets the regulation of GB/T1596 & 2017 fly ash for cement and concrete.
Further preferably, the sand is natural sand.
Further preferably, the natural coarse aggregate is natural macadam, and the grain size is graded continuously by 5-31.5 mm.
Further preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
Further preferably, the water is tap water.
Further preferably, the quality of the II-type recycled coarse aggregate meets the specification of DG/TJ08-2018 technical Specification for recycled concrete application.
More preferably, the continuous particle size fraction of the II-type recycled coarse aggregate is 5-40 mm.
Further preferably, the II-class recycled coarse aggregate is crushed by a jaw crusher and then screened.
The II-class recycled coarse aggregate is formed by crushing, cleaning, grading, screening and mixing waste concrete generated after operations such as urban demolition, construction, land development and the like according to a certain size fraction.
Further preferably, the strength of the II-type recycled coarse aggregate is more than or equal to grade C30.
Preferably, the walls are connected through the whole pouring of the recycled concrete in the reserved splicing grooves.
More preferably, the width of the reserved splicing groove along the transverse direction is 15-25mm, and preferably 20 mm.
Preferably, the wall body is including the front side wall body, the right side wall body, the rear side wall body, the left side wall body that connect gradually into closed enclosure, reserve the door and window frame mouth on front side wall body and the rear side wall body, the door and window frame mouth includes door frame mouth and window frame mouth, reserve wallboard frame mouth on left side wall body and the right side wall body.
More preferably, the size of the door frame opening is 2200 × 2400mm × 900 × 1100mm (length × width), preferably 2300mm × 1000 mm. The length refers to the long side along the transverse direction, and the width refers to the short side along the vertical direction.
More preferably, the size of the window frame opening is 1400 × 1600 × 1100 × 1300mm (length × width), preferably 1500 × 1200 mm. The length refers to the long side along the transverse direction, and the width refers to the short side along the vertical direction.
More preferably, a door frame opening and a first window frame opening are arranged on the front side wall body.
Further preferably, the vertical distance between the bottom of the door frame opening and the bottom of the front side wall body is 40-60mm, preferably 50 mm.
Further preferably, the vertical distance between the bottom of the first window frame opening and the bottom of the front side wall body is 800-900mm, and preferably 850 mm.
Further preferably, the horizontal distance between the door frame opening and the first frame opening is 360 and 370mm, preferably 367 mm.
Further preferably, the horizontal distance between the door frame opening and the side edge of the close front side wall body is 360-370mm, preferably 367 mm.
Further preferably, the horizontal distance between the first window frame opening and the side edge of the close front side wall body is 360-370mm, preferably 367 mm.
More preferably, a second window frame opening is arranged on the rear side wall body.
Further preferably, the vertical distance between the bottom of the second window frame opening and the bottom of the rear side wall body is 1200-1400mm, and preferably 1300 mm.
Further preferably, the horizontal distance between the second window frame opening and the side edge of the front side wall body close to the second window frame opening is 800-1000mm, and preferably 900 mm.
More preferably, the width of the front side wall and the rear side wall is 3200-3400mm, and preferably 3300 mm. The width of the front side wall body and the width of the rear side wall body refer to the length of the front side wall body and the length of the rear side wall body in the transverse direction.
More preferably, the height of the front side wall and the rear side wall is 2775-2785mm, preferably 2780 mm.
More preferably, the reserved post-cast concrete seams of the front side wall body and the rear side wall body are 15-25mm, and 20mm is preferred. Because the house floor height is 3m, post-cast concrete seams need to be reserved.
More preferably, 1-3 first steel bars, preferably 2 first steel bars, are vertically arranged between the door frame opening and the first window frame opening, between the door frame opening and the side edge of one side of the front side wall body close to the door frame opening, and between the first window frame opening and the side edge of one side of the front side wall body close to the door frame opening; 4-6 second steel bars, preferably 5 second steel bars, are arranged on the front side wall body along the two sides of the first window frame opening in the transverse direction; 6-8 third steel bars, preferably 7 third steel bars are transversely arranged between the door frame opening and the first window frame opening of the front side wall body; 10-12 fourth steel bars, preferably 11 fourth steel bars are transversely arranged between the door frame opening and the side edge of one side of the front side wall body close to the door frame opening; and 2-4 fifth reinforcing steel bars, preferably 3 fifth reinforcing steel bars, are transversely arranged between the first window frame opening and the side edge of one side of the front side wall body far away from the first window frame opening.
Further preferably, the first steel bar, the second steel bar, the third steel bar, the fourth steel bar and the fifth steel bar are all A8@250 steel bars.
Further preferably, the length of the first reinforcing steel bar is 2940 and 2980mm, preferably 2960 mm.
Further preferably, the length of the second steel bar is 3240-3280mm, preferably 3260 mm.
Further preferably, the length of the third steel bar is 300-340mm, preferably 320 mm.
Further preferably, the length of the fourth reinforcing steel bar is 400-440mm, preferably 420 mm.
Further preferably, the length of the fifth reinforcing steel bar is 1700-1900mm, preferably 1800 mm.
More preferably, the rear side wall body is vertically provided with 5-7 sixth steel bars, preferably 6 sixth steel bars, on the left side and the right side of the second window frame opening respectively; the rear side wall body is vertically provided with 6-8 seventh reinforcing steel bars, preferably 7 seventh reinforcing steel bars, on the upper side of the second window frame opening; the rear side wall body is vertically provided with 6-8 eighth steel bars, preferably 7 eighth steel bars, at the lower side of the second window frame opening; 6-8 ninth reinforcing steel bars, preferably 7 ninth reinforcing steel bars, are transversely arranged on the upper side and the lower side of the second window frame opening of the rear side wall body; and 9-11 tenth reinforcing steel bars, preferably 10 tenth reinforcing steel bars, are transversely arranged on the left side and the right side of the second window frame opening of the rear side wall body.
Further preferably, the sixth reinforcing steel bar, the seventh reinforcing steel bar, the eighth reinforcing steel bar, the ninth reinforcing steel bar and the tenth reinforcing steel bar are all A8@250 reinforcing steel bars.
Further preferably, the length of the sixth reinforcing steel bar is 2940-2980mm, preferably 2960 mm.
Further preferably, the length of the seventh reinforcing steel bar is 440-480mm, preferably 460 mm.
Further preferably, the length of the eighth reinforcing steel bar is 1240-1280mm, preferably 1260 mm.
Further preferably, the length of the ninth reinforcing steel bar is 3240-3280mm, and preferably 3260 mm.
Further preferably, the length of the tenth reinforcing steel bar is 840-880mm, preferably 860 mm.
More preferably, the thickness of the left and right walls is 5800-6200mm, preferably 6000 mm.
More preferably, the height of the left side wall and the right side wall is 2810-2850mm, and preferably 2830 mm.
More preferably, the size of the wallboard frame opening is 5400-. The length refers to the long side along the transverse direction, and the width refers to the short side along the vertical direction.
And prefabricating the filling wallboard according to the size of the wallboard frame opening.
More preferably, the vertical distance between the upper edge of the frame opening of the wallboard and the lower edge of the roof panel arranged at the top of the wall body is 340mm and 360mm, and preferably 350 mm.
More preferably, the vertical distance between the lower edge of the wallboard frame opening and the bottom of the left side wall and/or the right side wall is 140 mm and 160mm, and preferably 150 mm.
More preferably, the vertical distance between the lateral edges of the left and right sides of the wallboard frame opening and the lateral edge of the adjacent left wall and/or right wall is 240 mm and 260mm, preferably 250 mm.
More preferably, 22-24 eleventh reinforcing steel bars, preferably 23 eleventh reinforcing steel bars, are vertically arranged between the left side wall body and the right side wall body; and 10-12 twelfth reinforcing steel bars, preferably 11 twelfth reinforcing steel bars, are transversely arranged between the left side wall body and the right side wall body.
Further preferably, the eleventh steel bar and the twelfth steel bar are both A8@250 steel bars.
Further preferably, the length of the eleventh reinforcing steel bar is 2940-2980mm, preferably 2960 mm.
Further preferably, the length of the twelfth reinforcing steel bar is 5940-5980mm, and preferably 5960 mm.
Preferably, the thickness of the infill panel is 100-120mm, preferably 110 mm.
Preferably, the roof panel is connected with the top surface of the wall body through whole pouring of the recycled concrete in a reserved splicing groove.
More preferably, the width of the reserved splicing groove along the transverse direction is 15-25mm, and preferably 20 mm.
Preferably, the thickness of the roof plate is 140-160mm, preferably 150 mm.
Preferably, the width of the roof panel is 3200-3400mm, preferably 3300 mm.
Preferably, the length of the roof panel is 7400-7600mm, preferably 7500 mm.
The length refers to the length of the long side and the width refers to the length of the short side.
Preferably, the roof panel is externally provided with a rain shed along the length direction, and the length of the rain shed is 1400-1600mm, preferably 1500 mm.
Preferably, a reinforcing mesh is arranged in the roof panel, 11-13 thirteenth reinforcing steel bars and 1-3 fourteenth reinforcing steel bars are arranged in the roof panel along the width direction, and 30-32 fifteenth reinforcing steel bars are arranged in the roof panel along the length direction.
More preferably, 12 thirteenth reinforcing steel bars and 2 fourteenth reinforcing steel bars are arranged in the roof panel along the width direction, and 31 fifteenth reinforcing steel bars are arranged in the roof panel along the length direction.
More preferably, the anchoring length of the ends of the thirteenth reinforcing steel bar, the fourteenth reinforcing steel bar and the fifteenth reinforcing steel bar is 20-60mm, and preferably 40 mm.
More preferably, the steel bars on the steel bar mesh are A8@250 steel bars.
More preferably, the thirteenth reinforcing bar and the fifteenth reinforcing bar are A8 reinforcing bars.
More preferably, the fourteenth reinforcing steel bar is a longitudinal tie bar of C12.
More preferably, the length of the thirteenth reinforcing steel bar is 7440 and 7480mm, preferably 7460 mm.
More preferably, the length of the fourteenth reinforcing steel bar is 7440 and 7480mm, preferably 7460 mm.
More preferably, the length of the fifteenth reinforcing steel bar is 3240-3280mm, and preferably 3260 mm.
Preferably, the height of the corner post is 2980 and 3020mm, preferably 3000 mm.
Preferably, the horizontal cross-sectional dimension of the corner post is 200-. The length refers to the long side and the width refers to the short side.
Preferably, the vertical reinforcing bars of the corner posts are 3-5 sixteenth reinforcing bars and are provided with 14-16 first stirrups.
More preferably, the corner post is provided with 4 sixteenth reinforcing steel bars along the vertical direction and is provided with 15 first stirrups.
More preferably, the sixteenth reinforcing steel bar is a four-corner C12 or C16 reinforcing steel bar.
More preferably, the sixteenth reinforcing steel bar has a length of 2940 and 2980mm, preferably 2960 mm.
More preferably, the first stirrup is A8@200 rebar.
Preferably, the corner posts, the frame beams and the wall are connected through the whole pouring of the recycled concrete in the reserved splicing grooves.
More preferably, the width of the reserved splicing groove along the horizontal direction is 15-25mm, and preferably 20 mm.
Preferably, the frame roof beam includes front side roof beam, right side roof beam, back curb beam, left side roof beam, door and window lintel, front side roof beam locates front side wall body top, right side wall body top is located to the right side roof beam, back side roof beam locates back side wall body top, left side wall body top is located to the left side roof beam, the upper portion of door frame mouth and window frame mouth is located to the door and window lintel.
More preferably, the front and rear side members have lengths of 3200 and 3400mm, preferably 3300 mm.
More preferably, the horizontal cross-sectional dimensions of the front and rear side members are 200-. The length refers to the long side and the width refers to the short side.
More preferably, the reinforcing bars of the front side beam and the rear side beam along the length direction are 3-5 seventeenth reinforcing bars and are provided with 15-17 second stirrups; the left side beam and the right side beam are provided with eighteenth reinforcing steel bars in the length direction in a reinforcing manner of 3-5 and are provided with 29-31 third stirrups.
Further preferably, the reinforcing bars of the front side beam and the rear side beam along the length direction are 4 seventeenth reinforcing bars and are provided with 16 second stirrups; the left side roof beam and the right side roof beam are equipped with 4 eighteenth reinforcing bars along length direction to be furnished with 30 third stirrups.
Further preferably, the seventeenth reinforcing steel bar is a four-corner C16 reinforcing steel bar.
Further preferably, the eighteenth reinforcing steel bar is a four-corner C12 or C16 reinforcing steel bar.
Further preferably, the length of the seventeenth reinforcing steel bar and the eighteenth reinforcing steel bar is 2940-2980mm, preferably 2960 mm.
Further preferably, the second stirrup and the third stirrup are A8@200 steel bars.
More preferably, the left and right side members are 5900-.
More preferably, the horizontal cross-sectional dimensions of the left and right side members are 200-. The length refers to the long side and the width refers to the short side.
More preferably, the reinforcements of the left side beam and the right side beam along the length direction are 3-5 twentieth reinforcements and are provided with 29-31 second stirrups; the left side beam and the right side beam are provided with eighteenth reinforcing steel bars in the length direction in a reinforcing manner of 3-5 and are provided with 29-31 fifth stirrups.
Further preferably, the reinforcements of the left side beam and the right side beam along the length direction are 4 twentieth reinforcements and are provided with 30 second stirrups; the left side roof beam and the right side roof beam are equipped with 4 eighteenth reinforcing bars along length direction to be furnished with 30 fifth stirrup.
Further preferably, the twentieth reinforcing steel bar is a four-corner C12 or C16 reinforcing steel bar.
Further preferably, the length of the twentieth reinforcing steel bar is 5940-5980mm, and preferably 5960 mm.
More preferably, the length of the door and window lintel is 3200-3400mm, and preferably 3300 mm.
More preferably, the horizontal cross-sectional dimension of the door and window lintel is 440-. The length refers to the long side and the width refers to the short side.
More preferably, the reinforcing bars of the door and window lintel along the length direction are 3-5 nineteenth reinforcing bars and are provided with 15-17 fourth stirrups.
Further preferably, the reinforcing bars of the door and window lintel along the length direction are 4 nineteenth reinforcing bars and are provided with 16 fourth stirrups.
Further preferably, the nineteenth reinforcing steel bar is a C12 or C16 reinforcing steel bar.
Further preferably, the length of the nineteenth reinforcing steel bar is 3240-3280mm, and preferably 3260 mm.
Further preferably, the fourth stirrup is an A8@200 steel bar.
Preferably, the roof constant load of the roof panel is 3-4kN/m2。
Preferably, the roof board has a live roof load (no-man roof) of 0.4-0.5kN/m2。
Preferably, the frame beam has a self-weight of 0.5-0.58 kN/m.
Preferably, the dimensions of the roof panel conform to equation (1),
the formula (1) is: lylx＜2，
In the formula Iy-member longer side dimension (mm); lxThe member shorter side dimension (mm).
Preferably, the reinforcing bars needed by the roof panel accord with the formula (2),
the formula (2) is: m is 0.95fyAsh0，
In the formula, the design value of M-bending moment (kN.m); f. ofyDesign value of tensile strength of the steel bar in the length direction (N/mm)2)；As-bar cross-sectional area (mm) along length2)：h0Effective height (mm) of the concrete section.
Preferably, the flexural bearing capacity of the right section of the frame beam conforms to the formulas (3) and (4),
the formula (3) is:
the formula (4) is: alpha is alpha1fcbx+f′yA′s＝fyAs，
Wherein M is a bending moment design value (kN.m); alpha is alpha1-the ratio of the stress value of the rectangular stress diagram of the recycled aggregate concrete compression zone to the designed axial compressive strength value of the concrete; f. ofcRecycled aggregate concrete axial compressive strength design value (N/mm)2) (ii) a b-cross-sectional width (mm); h is0-a cross-sectional effective height (mm); x-recycled aggregate concrete compression zone height (mm); f. ofy、AsDesign value of tensile strength of the steel bar in the length direction (N/mm)2) Sum area (mm)2)。
Preferably, the shear bearing capacity of the oblique section of the frame beam conforms to the formula (5),
the formula (5) is:
wherein, V-shear design value (kN); alpha is alphacvThe shear bearing capacity coefficient of the concrete diagonal section is 0.7 for a general flexural member; f. oftRecycled aggregate concrete tensile Strength design value (N/mm)2) (ii) a b-cross-sectional width (mm); h is0-a cross-sectional effective height (mm); f. ofyvDesign value of tensile Strength of stirrup (N/mm)2)；AsvThe total cross-sectional area (mm) of the limbs of the stirrup arranged in the same section2) (ii) a s-stirrup spacing (mm) along the length of the member.
Preferably, the right section bearing capacity of the corner post conforms to equation (6),
the formula (6) is:
in the formula, N-axial pressure design value (kN);
-the stability factor of the reinforced concrete element; f. ofcRecycled aggregate concrete axial compressive strength design value (N/mm)2) (ii) a A-member cross-sectional area (mm)2)；f′yDesign value of compressive strength of the reinforcement in the vertical direction (N/mm)2) The value is less than or equal to 400N/mm2；A′sCross-sectional area (mm) of the reinforcement all along the vertical2)。
The invention provides a recycled concrete modular integrated house which is obtained by the construction method.
The reinforcement A, B, C in the present invention represents the first, second and third level reinforcement, respectively.
As described above, according to the construction method of the recycled concrete modularized integrated house, the waste concrete is crushed and screened to replace part of the natural coarse aggregate to serve as the component to prepare the recycled concrete, and the prefabricated modular house components are performed, so that a utilization way is provided for recycling building wastes on one hand, and the defects of the existing modularized house are overcome on the other hand. The invention adopts a standardized and modularized design, is not easy to cause the problem of installation errors, has a stable connection structure and is not easy to cause potential safety hazards. The modularized integrated house is simple in structure, convenient to hoist and transport, capable of serving as a temporary residence to be used in various emergency places, capable of improving the living experience of users compared with a steel plate house, and high in popularization value.
Drawings
Fig. 1 is a schematic structural view of the prefabricated side wall of the present invention.
Fig. 2 is a schematic structural view of the prefabricated front wall according to the present invention.
Fig. 3 is a schematic structural view of the prefabricated rear wall according to the present invention.
Fig. 4 shows a schematic structural view of reinforcing bars of the roof panel in the invention.
Fig. 5 is a schematic structural view of the reinforcement of the front sidewall according to the present invention.
Fig. 6 is a schematic structural view of the reinforcement of the rear side wall in the present invention.
Fig. 7 is a schematic structural view of the side wall reinforcement of the present invention.
Reference numerals
11 front side wall
12 right side wall
13 rear side wall
14 left side wall
151 door frame opening
152 first window frame opening
153 second window frame opening
16 wallboard frame mouth
2 roof boarding
3 corner post
41 front side member
42 Right side beam
43 rear side member
44 left side beam
45 door and window lintel
5 reserved splicing groove
6-out rain shed
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 7. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the specification and reading, and are not used for limiting the limit conditions of the present invention, so they have no technical significance, and any structural modifications are disclosed in order to make the skilled person understand that the changes of the ratio relationships and the size adjustments, and the technical scope of the present invention can be covered without affecting the function and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1
A recycled concrete modularized integrated house is constructed, as shown in figures 1-7, a wall body, a filling wallboard and a roof panel are prefabricated by recycled concrete, and a door and window frame opening and a wallboard frame opening are reserved on the wall body.
The strength of the recycled concrete is class C30. The recycled concrete comprises the following components in parts by weight: 296 parts of cement; 74 parts of fly ash; 609 parts of sand; 618 parts of natural coarse aggregate; 618 parts of II-class recycled coarse aggregate; 3.7 parts of a water reducing agent; 140 parts of water. The recycled concrete had a recycled coarse aggregate substitution rate of 50%.
Wherein the cement is PO42.5 portland cement. The fly ash is I-grade fly ash. The sand is natural sand. The natural coarse aggregate is natural macadam. The water reducing agent is a polycarboxylic acid water reducing agent. The water is tap water. The II-class recycled coarse aggregate is waste concrete meeting the requirements of DG/TJ08-2018 technical Specification for recycled concrete application, is crushed by a jaw crusher and then screened, the continuous grain size is 5-40 mm, and the strength of the II-class recycled coarse aggregate is C30.
At the job site will the wall body sets up and forms and seals the enclosure, and the wall body includes front side wall body, right side wall body, rear wall body, left side wall body, reserves door and window frame mouth on front side wall body and the rear wall body, and door and window frame mouth includes door frame mouth and window frame mouth, reserves wallboard frame mouth on left side wall body and the right side wall body. The dimensions of the door frame opening are 2300mm x 1000mm (length x width). The dimensions of the window frame opening are 1500mm × 1200mm (length × width). The walls are connected through the whole-poured recycled concrete of the reserved splicing grooves, and the width of the reserved splicing grooves along the transverse direction is 20 mm.
Wherein, be equipped with door frame mouth and first window frame mouth on the preceding wall body. The vertical distance between the bottom of the door frame opening and the bottom of the front side wall body is 50 mm. The vertical distance between the bottom of the first window frame opening and the bottom of the front side wall body is 850 mm. The horizontal distance between the door frame opening and the first window frame opening is 367 mm. The horizontal distance between the door frame opening and the side edge of one side of the close front side wall body is 367 mm. The horizontal distance between the first window frame opening and the side edge of one side of the close front side wall body is 367 mm.
And a second window frame opening is arranged on the rear side wall body. The vertical distance between the bottom of the second window frame opening and the bottom of the rear side wall body is 1300 mm. The horizontal distance between the second window frame opening and the side edge of one side of the front side wall body close to the second window frame opening is 900 mm.
The thickness of the front side wall body and the rear side wall body is 3300 mm. The height of the front side wall body and the rear side wall body is 2780 mm. The reserved post-cast concrete joints of the front side wall body and the rear side wall body are 20 mm.
The front side wall body is vertically provided with 2 first steel bars between the door frame opening and the first window frame opening, between the door frame opening and the side edge of one side of the front side wall body close to the door frame opening, and between the first window frame opening and the side edge of one side of the front side wall body close to the door frame opening; the front side wall body is transversely provided with 5 second steel bars on two sides of the door frame opening and the first window frame opening respectively; 7 third steel bars are arranged between the door frame opening and the first window frame opening along the transverse direction of the front side wall body; the front side wall body is transversely provided with 11 fourth steel bars between the door frame opening and the side edge of one side of the front side wall body close to the door frame opening; and 3 fifth steel bars are transversely arranged between the first window frame opening and the side edge of one side of the front side wall body far away from the first window frame opening.
The first steel bar, the second steel bar, the third steel bar, the fourth steel bar and the fifth steel bar are A8@250 steel bars. The length of the first reinforcing steel bar is 2960 mm. The length of the second reinforcing steel bar is 3260 mm. The length of the third reinforcing steel bar is 320 mm. The length of the fourth reinforcing steel bar is 420 mm. The length of the fifth reinforcing bar is 1800 mm.
The rear side wall body is vertically provided with 6 sixth steel bars on the left side and the right side of the second window frame opening respectively; the rear side wall body is vertically provided with 7 seventh steel bars on the upper side of the second window frame opening; the rear side wall body is vertically provided with 7 eighth steel bars at the lower side of the second window frame opening; 7 ninth reinforcing steel bars are transversely arranged on the upper side and the lower side of the second window frame opening of the rear side wall body respectively; and the front side wall body is transversely provided with 10 tenth reinforcing steel bars on the left side and the right side of the second window frame opening respectively.
The sixth reinforcing steel bar, the seventh reinforcing steel bar, the eighth reinforcing steel bar, the ninth reinforcing steel bar and the tenth reinforcing steel bar are A8@250 reinforcing steel bars. The length of the sixth reinforcing steel bar is 2960 mm. The length of the seventh reinforcing steel bar is 460 mm. The eighth reinforcing bar has a length of 1260 mm. The ninth reinforcing steel bar has a length of 3260 mm. The length of the tenth reinforcing steel bar is 860 mm.
Wherein, the thickness of the left wall body and the right wall body is 6000 mm. The height of the left wall body and the right wall body is 2830 mm. The left wall body and the right wall body are vertically provided with 23 eleventh steel bars; and 11 twelfth reinforcing steel bars are transversely arranged on the left side wall body and the right side wall body. The eleventh reinforcing steel bar and the twelfth reinforcing steel bar are both A8@250 reinforcing steel bars. The length of the eleventh reinforcing steel bar is 2960 mm. The length of the twelfth reinforcing steel bar is 5960 mm.
And embedding the filling wallboard in a wallboard frame opening in a regenerated concrete belt mode. The size of the wallboard frame opening is 5500mm multiplied by 2500mm (length multiplied by width). The vertical distance between the upper edge of the wallboard frame opening and the lower edge of the roof panel arranged at the top of the wall body is 350 mm. The vertical distance between the lower edge of the wallboard frame opening and the bottom of the left side wall body and/or the right side wall body is 150 mm. The vertical distance between the lateral margins of the left and right sides of the wallboard frame opening and the lateral margin of the close left side wall body and/or right side wall body is 250 mm. The thickness of the infill panel is 110 mm.
And connecting the roof panel and the top surface of the wall body through the whole-cast recycled concrete with a reserved splicing groove, wherein the width of the reserved splicing groove along the transverse direction is 20 mm. The thickness of the roof plate is 150 mm. The width of the roof panel is 3300 mm. The length of the roof panel is 7500 mm. The roof panel is externally provided with a rain shed in the length direction, and the length of the rain shed is 1500 mm.
Be equipped with the reinforcing bar net in the roof boarding, set up 12 thirteenth reinforcing bars and 2 fourteenth reinforcing bars along width direction in the roof boarding, set up 31 fifteenth reinforcing bars along length direction in the roof boarding. And the anchoring length of the end parts of the thirteenth reinforcing steel bar, the fourteenth reinforcing steel bar and the fifteenth reinforcing steel bar is 40 mm. The reinforcing steel bars on the reinforcing mesh are A8@250 reinforcing steel bars. The thirteenth reinforcing bar and the fifteenth reinforcing bar are A8 reinforcing bars. The fourteenth reinforcing steel bar is a pulling longitudinal bar of C12. The thirteenth bar has a length of 7460 mm. The fourteenth reinforcing bar had a length of 7460 mm. The length of the fifteenth reinforcing steel bar is 3260 mm.
And connecting the corner columns, the frame beams and the wall body through the whole pouring of the recycled concrete in the reserved splicing grooves.
The horizontal cross-sectional dimensions of the corner posts are 210mm x 110mm (length x width). The height of the corner posts is 3000 mm. The corner post is 4 sixteenth reinforcing bars along vertical arrangement of reinforcement to be furnished with 15 first stirrups. The sixteenth reinforcing steel bar is a four-corner C16 reinforcing steel bar. The sixteenth reinforcing steel bar is 2960mm in length. The first stirrup is an A8@200 steel bar.
The frame beam is connected with the wall body through the whole pouring of the recycled concrete in the reserved splicing groove. The frame beam comprises a front side beam, a right side beam, a rear side beam, a left side beam and a door and window lintel.
The length of the front side member and the rear side member is 3300 mm. The length of left side roof beam and right side roof beam is 6000 mm. The horizontal sectional dimensions of the front and rear side members are 210mm × 110mm (length × width). The horizontal sectional dimensions of the left and right side members are 210mm × 110mm (length × width). The front side beam and the rear side beam are provided with 4 seventeenth reinforcing steel bars along the length direction and are provided with 16 second stirrups; the left side roof beam and the right side roof beam are equipped with 4 eighteenth reinforcing bars along length direction to be furnished with 30 third stirrups. The seventeenth reinforcing steel bar and the eighteenth reinforcing steel bar are four-corner C16 reinforcing steel bars. The seventeenth reinforcing steel bar and the eighteenth reinforcing steel bar have the length of 2960 mm. The second stirrup and the third stirrup are A8@200 steel bars.
The length of the door and window lintel is 3300 mm. The horizontal section dimension of the door and window lintel is 450mm x 110mm (length x width). The door and window lintel is provided with 4 nineteenth reinforcing steel bars along the length direction and 16 fourth stirrups. The nineteenth reinforcing bar is a 6C16 reinforcing bar. The nineteenth reinforcing steel bar has the length of 3260 mm. The fourth stirrup is A8@200 steel bar.
Example 2
The dimension and the stress of the recycled concrete modularized integrated house prepared in the embodiment 1 are calculated, the premise of component reinforcement unification is cancelled by checking calculation, and whether the recycled concrete modularized integrated house with the reduced steel consumption cost meets the requirement of bearing capacity or not is judged.
(1) In the bearing capacity of the roof panel, the constant roof load of the roof panel is 0.15 multiplied by 25+0.015 multiplied by 17-4 kN/m2。
The roof live load (no-man roof) of the roof panel is 0.5kN/m2。
(2) The weight of the frame beam is 0.21 × 0.11 × 25 ═ 0.58 kN/m.
(3) The size of the roof plate conforms to the formula (1),
according to formula (1), roof panel size:
(4) the reinforcing bars needed by the roof panel accord with the formula (2),
(5) normal section bending bearing capacity of frame beam
1) Checking calculation of right section bearing capacity of left side beam and right side beam
The side beam lower wall plate has a supporting function for the side beam span,
the side sill calculated span is then: l0＝3000-2×110/2＝2890mm，
The midspan bending moment is: m ═ 10.75 × 2.892/24＝3.7kN
According to the formulas (3) and (4), A is obtained by calculations＝126.5mm2。
Matching C12 (A)s＝226mm2) True match C16 (A)s＝402mm2)。
2) Checking calculation of front section bearing capacity of front side beam and rear side beam
Calculating the span of the front beam and the rear beam: l0＝3300-2×210/2＝3090mm，
For the back beam, the load evenly distributed on the beam is as follows:
the midspan bending moment is: m ═ 11.7 × 3.092/24＝4.7kN
According to the formulas (3) and (4), A is obtained by calculations＝160mm2。
Matching C12 (A)s＝226mm2) True match C16 (A)s＝402mm2)。
For the front beam, in view of the function of picking up the awning,
the midspan bending moment is: m ═ 20.6 × 3.092/24＝8.2kN
According to the formulas (3) and (4), A is obtained by calculations＝320.2mm2。
Matching C16 (A)s＝402mm2) True match C16 (A)s＝402mm2)。
(6) The shear bearing capacity of the oblique section of the frame beam conforms to the formula (5), and the checking calculation data of the shear bearing capacity of the oblique section of the corresponding frame beam are shown in table 1.
TABLE 1
(7) The normal section bearing capacity of the corner post conforms to the formula (6),
wherein l0＝H＝3m，
Then, the following steps are obtained:
looking up the table to obtain the stability factor of the axial compression member
The reinforcing steel bars are matched according to the minimum reinforcing steel bar ratio of 0.55 percent of the construction requirement.
According to the formula (6):
matching C12 (A)s＝452mm2) True match C16 (A)s＝804mm2)。
Example 3
Table 2 examples 1 and 2 reinforcement comparison
| Component | Example one Reinforcement | Example two optimization Reinforcement |
| Roof board | A8@250 | A8@250 |
| Side girder | 2C16 | 2C12 |
| Front side main beam | 2C16 | - |
| Rear main beam | 2C16 | 2C12 |
| Door and window lintel | 2C16 | 2C12 |
| Corner post | 2C16 | 2C12 |
Comparing example 1 with example 2, the longitudinal reinforcing bars of the side main beam, the rear main beam, the door and window lintel and the corner post in example 2 are optimized to C12 reinforcing bars by C16 reinforcing bars under the condition of meeting the requirement of bearing capacity, and the specific data are shown in Table 2. The steel consumption can be reduced by carrying out reinforcement adjustment under the condition of ensuring the bearing capacity of the component, so that the production cost is reduced. However, the longitudinal reinforcement in the embodiment 1 further meets the requirements of factory component production standardization and unification, and the production efficiency is higher. Therefore, the embodiment 1 and the embodiment 2 are the preferable and practical embodiments of the invention of the modular integrated house.
Example 4
The recycled concrete modular integrated house prepared in example 1 was subjected to a fire test. Test results show that the time for losing the heat insulation property, the integrity and the bearing capacity is respectively 18min, 20min and 28min, the fire endurance of the component is 18min, and the fire resistance of the component is good; the air sound and sound insulation detection result of the outer wall is 30dB, the sound insulation performance is 5 grades, and compared with a steel structure modular house, the steel structure modular house has a good sound insulation effect.
In conclusion, the construction method of the recycled concrete modularized integrated house provided by the invention provides a utilization way for recycling construction waste on one hand, overcomes the defects of the existing modularized house on the other hand, is not easy to cause potential safety hazards, and has high popularization value. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method for building a recycled concrete modularized integrated house is characterized by comprising the following steps: the method comprises the following steps of prefabricating a wall body, a filled wallboard and a roof panel by using recycled concrete, wherein a door and window frame opening and a wallboard frame opening are reserved on the wall body; the wall body is arranged to form a wall on a construction site, the filling wallboard is embedded in a wallboard frame opening in a regenerated concrete strip mode, the roof board is connected with the top of the wall body through cast-in-place regenerated concrete, and the corner columns and the frame beams are connected with the wall body through cast-in-place regenerated concrete.
2. The method for building the recycled concrete modular integrated house according to claim 1, wherein the recycled concrete comprises the following components in parts by weight:
cement 290-300 parts;
70-80 parts of fly ash;
600 portions and 620 portions of sand;
618 parts of natural coarse aggregate;
265 portions of II-class recycled coarse aggregate and 618 portions;
3-4 parts of a water reducing agent;
130 portions of water and 150 portions of water.
3. The method for constructing a recycled concrete modular integrated house according to claim 2, wherein the recycled concrete comprises any one or more of the following conditions:
A) the cement is portland cement;
B) the fly ash is I-grade fly ash;
C) the sand is natural sand;
D) the natural coarse aggregate is natural macadam, and the grain size is graded continuously by 5-31.5 mm;
E) the water reducing agent is a polycarboxylic acid water reducing agent;
F) the continuous particle size fraction of the II-class recycled coarse aggregate is 5-40 mm;
G) the water is tap water.
4. The building method of the recycled concrete modularized integrated house according to claim 1, wherein the walls are connected by pouring recycled concrete in a whole through a reserved splicing groove; the roof panel is connected with the top surface of the wall body through the whole pouring of the recycled concrete in the reserved splicing groove; the corner columns, the frame beams and the wall are connected through the whole pouring of the recycled concrete in the reserved splicing grooves; and a rain shed for picking up is arranged on the roof panel along the length direction.
5. The building method of the recycled concrete modular integrated house as claimed in claim 1, wherein the wall body comprises a front side wall body, a right side wall body, a rear side wall body and a left side wall body which are sequentially connected to form a closed enclosure wall, the front side wall body and the rear side wall body are provided with door and window frame openings, the door and window frame openings comprise door frame openings and window frame openings, and the left side wall body and the right side wall body are provided with wallboard frame openings; the front side wall body is provided with a door frame opening and a first window frame opening; and a second window frame opening is arranged on the rear side wall body.
6. The building method of the recycled concrete modularized integrated house as claimed in claim 5, wherein said frame beams comprise front side beams, right side beams, rear side beams, left side beams and door and window lintels, said front side beams are arranged on the top of the front side wall body, said right side beams are arranged on the top of the right side wall body, said rear side beams are arranged on the top of the rear side wall body, said left side beams are arranged on the top of the left side wall body, and said door and window lintels are arranged on the upper portions of the door and window frame openings.
7. A recycled concrete modular integrated house construction method according to claim 1, characterised in that said roof panels comprise any one or more of the following conditions:
A1) the roof constant load of the roof panel is 3-4kN/m2；
A2) The roof live load of the roof panel is 0.4-0.5kN/m2；
A3) The size of the roof panel conforms to formula (1), wherein formula (1) is: lylx< 2, in the formula, lyThe longer side dimension of the member, mm; lxThe dimension of the shorter side of the component is mm;
A4) the reinforcing bars required by the roof panel accord with a formula (2), wherein the formula (2) is as follows: m is 0.95fyAsh0Wherein M is a design value of bending moment, kN.m; f. ofyDesigned value of tensile strength of the steel bar along the length direction, N/mm2；AsIs the section area of the reinforcing steel bar in the length direction, mm2：h0Is the effective height of the concrete section, mm.
8. The method for constructing a recycled concrete modular integrated house according to claim 1, wherein the frame beam comprises any one or more of the following conditions:
B1) the self weight of the frame beam is 0.5-0.58 kN/m;
B2) the normal section bending bearing capacity of the frame beam conforms to the formulas (3) and (4),
the formula (3) is:
the formula (4) is: alpha is alpha1fcbx+f'yA's＝fyAs，
In the formula, M is a bending moment design value, kN.m; alpha is alpha1Is the stress value of a rectangular stress diagram of a compression zone of recycled aggregate concrete and the compressive strength of the axle center of the concreteA ratio of design values; f. ofcFor the design value of the axial compressive strength of the recycled aggregate concrete, N/mm2(ii) a b is the cross-sectional width, mm; h is0Is the effective height of the section, mm; x is the height of the recycled aggregate concrete compression zone, and is mm; f. ofy、AsDesigned value N/mm for tensile strength of steel bar along length direction2And area mm2；
B3) The shear bearing capacity of the oblique section of the frame beam conforms to the formula (5),
the formula (5) is:
in the formula, V is a shear design value, kN; alpha is alphacvThe shear bearing capacity coefficient of the concrete oblique section is 0.7 for a common bending member; f. oftThe tensile strength of the recycled aggregate concrete is designed to be N/mm2(ii) a b is the section width, mm; h is0Is the effective height of the section, mm; f. ofyvDesigned value of tensile strength of stirrup, N/mm2；AsvIs configured in the same section, and has the total section area of each limb of the stirrup of mm2(ii) a s is the stirrup spacing in mm along the length of the member.
9. The method for constructing a recycled concrete modular integrated house according to claim 1, wherein the right section bearing capacity of the corner post conforms to formula (6),
the formula (6) is:
in the formula, N is a designed axial pressure value, kN;
is the stability factor of the reinforced concrete member; f. ofcFor the design value of the axial compressive strength of the recycled aggregate concrete, N/mm2(ii) a A is the cross-sectional area of the member in mm2；f'yDesigned value of compressive strength of the vertical reinforcing steel bar, N/mm2The value is less than or equal to 400N/mm2；As' Cross-sectional area of all along the vertical reinforcing bars, mm2。
10. A recycled concrete modular integrated house constructed by the method of any one of claims 1 to 9.
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