CN112282145A - Manufacturing process of light concrete light steel frame PC embedded cast-in-place wall - Google Patents
Manufacturing process of light concrete light steel frame PC embedded cast-in-place wall Download PDFInfo
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- CN112282145A CN112282145A CN202010909985.5A CN202010909985A CN112282145A CN 112282145 A CN112282145 A CN 112282145A CN 202010909985 A CN202010909985 A CN 202010909985A CN 112282145 A CN112282145 A CN 112282145A
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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
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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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
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
Abstract
The invention discloses a manufacturing process of a lightweight concrete lightweight steel skeleton PC embedded cast-in-place wall, which comprises the following steps: firstly, manufacturing a light steel framework by using a pressed light steel keel, manufacturing reserved nodes, paving steel plate nets on two sides, scraping and smearing reinforced cement on two sides of the light steel framework, and manufacturing a PC wall template; hoisting the PC wall template to a specified position by using a small crane or a movable pulley according to the drawing requirements, and fixing the reserved nodes; embedding beam column parts by using the rectangular square frame, plugging by using a steel plate net, coating glass fiber gridding cloth on the joint of the beam column parts and the PC wall body, and connecting surface scraping layers with all parts of the wall body; the method comprises the steps of lining thin-film geotextile in steel skeleton inner leaf steel plate nets, pre-burying a pipeline box, pouring light concrete, and finally scraping polymer reinforced cement on the inner side surface of a wall body. The PC wall only weighs 300kg, the hoisting is convenient, the node design is scientific, and the working procedures are saved; the reinforced cement has good toughness and good crack resistance and water resistance after being hardened.
Description
Technical Field
The invention relates to the field of PC (polycarbonate) assembly type building construction, in particular to a manufacturing process of a light concrete light steel skeleton PC embedded type cast-in-place wall.
Background
The traditional exterior wall PC hanging plate is a solid wall plate formed by combining concrete and reinforcing steel bars, is fixed outside a main body frame structure by adopting sleeve joints in a hoisting mode, has the volume weight of 2400-.
While the common building wall still has some outstanding problems, the country in the field of prefabricated building does not advocate, for example: 1. the existing wall body adopting the modes of building blocks, battens and the like is rigidly connected with beams and columns, lacks integrity and hard sealing, but the country does not allow brickworks to be used as a maintenance wall body, and the wall body and an interface between the wall body and a structural system are easy to crack, leak gas and permeate water. 2. The wall material without the light steel framework needs the compressive strength of more than 5.0Mpa, has higher density and insufficient heat insulation performance, and the outer wall also needs to be provided with an outer heat insulation layer independently, or is easy to burn, or is easy to fall off, or has uneven surface and cracks, so that the wall material has serious potential safety hazards and cannot have the same service life as the main building. 3. The light wall with the light steel framework or the light wall which is filled by the heat preservation plate and wrapped by the structural panel has the defects of poor sealing, easy cracking, poor fire resistance and poor sound insulation; or depending on the filling of lightweight concrete, the interface with the structural system shrinks and cracks, and the problems of thermal bridges, acoustic bridges, air leakage, water permeation and the like occur. 4. The assembly type wall body adopting the self-insulation large wall board needs to arrange a connecting piece at the joint of the wall body and a structural system, and flexible sealing materials are refilled after installation, so that the process is complex, the connection reliability and the sealing tightness are difficult to guarantee, and the problems of cracking, air leakage and water permeation frequently occur. 5. The weight of a PC prefabricated module in the prior art reaches 2-3 tons, a heavy walking crane is needed to finish hoisting, the hoisting process is complex, the efficiency is low, and the potential safety hazard is large.
And as an improvement scheme, chinese patent with application number 201821793074.5 discloses a prefabricated compound outer wall of assembled light steel skeleton, including supporting skeleton to and the gradual change formula composite insulation layer of support skeleton pouring rigid coupling, gradual change formula composite insulation layer including the micropore foam concrete basic unit, heat preservation core material layer and the inorganic insulation material gradual change transition layer that set gradually, the lateral surface of inorganic insulation material gradual change transition layer be equipped with the outer decorative board inoxidizing coating of supporting skeleton rigid coupling. Although this outer wall keeps warm effectually, but not inlay through the hoist and mount of PC wall body module and accomplish, there are hidden danger such as the process is various, danger coefficient height in the site operation, can't overcome the drawback of the fracture of permeating water in seam crossing moreover, and the construction degree of difficulty is great when installing the inlayer heat preservation core moreover.
Disclosure of Invention
The invention aims to provide a manufacturing process of a lightweight concrete light steel frame PC embedded cast-in-place wall body, which is convenient to hoist and saves working procedures, and solves the problems in the prior art.
In order to realize the technical scheme, the following technical scheme is adopted:
the light concrete light steel skeleton PC embedded cast-in-place wall body manufacturing process mainly comprises the following steps:
(1) the galvanized steel strip is pressed by a cold bending keel machine to form a C-shaped keel, a web plate of a single-row keel needs to be subjected to wire drawing and punching, the punching rate is not lower than 30%, and the double rows of keels are connected by adopting small-specification keels and tie bars to form a trapezoidal structure, so that the stability of the keel structure is ensured;
(2) fixing the double-row keels or the single-row keels into a light steel lattice framework by upper and lower guide rails according to the distance of 300-350mm, wherein the external dimension of the framework is the same as the dimension of the opening of the main body framework;
(3) laying steel plate meshes on two sides of the light steel lattice framework or hanging thin stone and ceramic plates on the outer side of the light steel lattice framework in a dry mode to form a mould-dismounting-free mode, and reserving positions for door and window openings;
(4) if the steel plate net is laid, scraping and smearing 1cm thick reinforced anti-crack plaster on the outer side of the steel plate net;
(5) manufacturing reserved nodes on the light steel keel, wherein the reserved nodes comprise 5 nodes for hoisting at the upper end of a PC wall body; a detachable reinforcing cross beam is fixed on the upper part of the light steel lattice framework, so that the light steel lattice framework is not deformed during hoisting operation;
(6) laying steel plate nets on the inner leaves of the door openings of the doors and the windows; then scraping and smearing reinforced cement on the inner side of the door and window opening to finish the manufacture of the inner side of the door and window opening;
(7) completing hoisting operation through a small-tonnage traveling crane or a pulley block on the upper part of the construction space;
(8) fixing the reserved nodes in a bolting mode according to a wall design drawing, and flexibly connecting steel frameworks and beam-column contact surfaces; annular wall pressing ribs for connecting the wall are arranged on the inner side and the outer side of the column, and the constructional column and the wall are firmly connected into a whole;
(9) after the light steel lattice type framework part is installed, the beam column part adopts a rectangular square frame embedding mode, the inner space and the outer space are blocked through lapping steel plate meshes, glass fiber mesh cloth is coated on the edge joint, and finally reinforced cement is scraped for the second time, so that the shell structure is integrally formed on the inner wall surface and the outer wall surface.
(10) Lining a thin film geotextile in a steel plate net of the inner leaf of the light steel framework, and then embedding a pipeline box in advance; the inner surface and the outer surface of the beam column part are blocked by the same method;
(11) pouring lightweight concrete into the wall, and pouring the lightweight concrete at the beam column part in the same way;
(12) and scraping the reinforced cement on the inner side surface of the wall body, and leveling up, down, left and right.
The further improvement is that the single-row keel is suitable for constructing the wall with the wall thickness smaller than 200mm, and the double-row keel is suitable for constructing the wall with the wall thickness larger than or equal to 200 mm.
The assembly site of the light steel lattice type framework is a factory workshop or a construction site.
Preferably, the reinforced daub comprises the following components in percentage by weight: cement: 18.3%, fine sand: 64.1%, 20 mm long fiber: 0.37 percent of wood fiber, 0.61 percent of additive hydroxypropyl methyl cellulose, 0.061 percent of additive, and the balance of water, which are used as the surface layer of the wall body, about 14kg of reinforced cement needs to be scraped per square meter.
Preferably, the flexible connection is achieved by applying 2 cm thick modified benzene plates to both side surfaces of the column.
Further improved, the installation process of the light steel lattice framework in the step (2) and the steel plate net in the step (3) is as follows: the steel plate net is characterized in that two steel beams which are placed in parallel are leveled according to a preset distance, a certain distance is formed by extending according to the requirements of design drawings, then vertical C-shaped keels are connected after being sequentially paved along upper and lower guide rails embedded with light steel frameworks along the steel beams, connecting points are fixed by self-tapping screws and blind rivets, then steel plate nets on two sides are fixed by pneumatic spiral screws, and an automatic position adjusting device is arranged on the outer sides of the steel beams.
The further improvement is that a single PC wall body module weighs about 300kg, can use two sets of movable pulleys bare-handed accurate hoist to the assigned position.
The further improvement is that the reinforcing beam in the step (5) is made of 45# steel or 42CrMo steel; the reserved nodes are fixed below the hoisting cables of the traveling crane in a multi-point bolting mode, and the hoisting safety and the hoisting efficiency can be fully guaranteed.
The invention has the beneficial effects that: firstly, the PC wall body module made of the light steel keel not only has light dead weight, but also is beneficial to hoisting operation and not easy to deform because the light steel keel is provided with a plurality of reserved nodes; in addition, the shell made of the reinforced cement and the steel plate mesh is not only anti-cracking and waterproof, but also is not easy to deform after the lightweight concrete is poured, and is durable in use; thirdly, the manufacturing of the light steel lattice type framework can be finished in a factory workshop and a construction site, so that the mounting process is flexibly handled; and finally, the beam column part utilizes the rectangular square frame to determine the position, so that the construction progress can be accelerated, the working procedures can be reduced, and the construction efficiency can be improved.
Drawings
FIG. 1 is an overall block diagram of a PC wall module made in accordance with the present invention;
FIG. 2 is a block connection structure view of the beam column part of the present invention;
the labels in the figure are: 1. the light steel lattice framework comprises a light steel lattice framework 2, door and window openings 3, a reinforced cement layer 4, a beam column part 5 and a steel plate mesh.
Detailed Description
The invention will be explained and explained in further detail below with reference to embodiments and the attached drawings.
Example (b): referring to fig. 1-2, a process for manufacturing a lightweight concrete lightweight steel frame PC embedded cast-in-place wall body mainly includes the following steps:
(1) pressing the galvanized steel strip into a C-shaped keel through a cold bending keel machine, wherein the web plate of the single-row keel needs drawing and punching, and the punching rate is not lower than 30%; the double rows of keels are connected by the small-specification keels through the tie bars, so that the connecting structure is trapezoidal; the single-row keel is suitable for a wall with the wall thickness smaller than 200mm, and the double-row keel is suitable for a wall with the wall thickness larger than or equal to 200 mm;
(2) fixing the double-row keels or the single-row keels into the light steel lattice type framework 1 by the upper and lower guide rails according to the distance of 300-350mm, so that the external dimension of the framework is the same as that of the opening of the main body framework; the assembly site of the light steel lattice type framework 1 can be a factory workshop or a construction site;
(3) laying steel plate nets 5 on two sides of the light steel lattice type framework 1 or hanging thin stone and ceramic plates on the outer side of the light steel lattice type framework 1 in a dry mode, and reserving a position for a door and window hole 2 while laying the materials or the steel plate nets;
(4) scraping and smearing 1cm thick reinforced anti-cracking mortar on the outer side of the steel plate net 5; after the daub is hardened, for projects in cold regions, a polyurethane foam material can be sprayed on the inner side of the enhanced daub surface layer 3 to reach the local thermal insulation standard of the wall body;
(5) fixing the reserved nodes in a bolting mode according to a wall design drawing, wherein the reserved nodes comprise 5 reserved nodes for hoisting at the upper end of a PC wall module; a detachable reinforcing cross beam is arranged at the upper part of the light steel lattice type framework 1, the reinforcing cross beam is made of 45# steel or 42CrMo steel by casting, and the reinforcing cross beam is taken down after the hoisting is finished;
(6) laying a steel plate mesh 5 for plugging on the inner leaf of the door and window opening 2; then scraping and smearing the enhanced type daub layer 3 on the inner side of the door and window opening 2 to finish the manufacture of the wall body on the inner side of the door and window opening 2;
(7) the weight of a single PC wall body module is 300kg, so that the single PC wall body module can be accurately hoisted to a specified position by hands by using two groups of movable pulleys, or hoisting operation is completed by using a small-tonnage traveling crane at the upper part of a construction space; the reserved nodes are connected below the suspension cables of the traveling crane in a multi-point bolting mode, and the requirements of safety and high efficiency are met;
(8) fixing the reserved nodes in a bolting mode according to a wall body design drawing, and flexibly connecting the steel skeleton and the beam column contact surface, wherein the flexible connection is realized by pasting benzene plates with the thickness of 2 centimeters on the surfaces of two sides of the column; annular wall pressing ribs for connecting the wall are arranged on the inner side and the outer side of the column; the beam column section 4 may be specially shaped according to design drawings.
(9) After the light steel lattice type framework 1 is installed, the beam column part 4 adopts a rectangular square frame embedding mode, the inner space and the outer space are sealed by paving a steel plate net 5, glass fiber net grid cloth is coated on the edge joint, and finally reinforced cement is scraped for the second time, so that the inner wall surface and the outer wall surface form a shell structure integrally.
(10) The method comprises the following steps that thin-film geotextile is lined in a steel plate net 5 of an inner leaf of a light steel lattice framework 1, then a pipeline box is pre-buried, and the inner surface and the outer surface of a beam column part 4 are plugged by the same method;
(11) pouring lightweight concrete in the wall, and treating the beam column part 4 in the same way;
(12) and scraping the reinforced cement on the inner side surface of the wall body, and leveling up, down, left and right.
The reinforced daub comprises the following components in percentage by weight: cement: 18.3%, fine sand: 64.1%, 20 mm long fiber: 0.37 percent of wood fiber, 0.61 percent of wood fiber, 0.061 percent of additive hydroxypropyl methyl cellulose and the balance of water, wherein the reinforced cement is used as a surface layer of the wall body and is scraped with about 14kg of the reinforced cement per square meter of the surface of the wall body.
The installation process of the light steel lattice type framework 1 and the steel plate net 5 is as follows: firstly, leveling two steel beams which are placed in parallel according to the length of 2.8-3.6 m, extending for 6-30 m according to a design drawing, then sequentially laying along upper and lower guide rails embedded with light steel frameworks and then connecting with a vertical C-shaped keel, fixing connection points by adopting self-tapping nails and pull rivets, and then firmly nailing steel plate nets 5 at two sides by using pneumatic spiral nails, wherein the steel beams are provided with automatic position adjusting devices.
Claims (8)
1. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body is characterized by comprising the following steps:
(1) the galvanized steel strip is pressed into a C-shaped keel through a cold bending keel machine, a web plate of a single-row keel needs drawing and punching, the punching rate is not lower than 30%, and double-row keels are connected by small-specification keels through a tie bar to form a trapezoidal structure;
(2) assembling the double-row keels or the single-row keels into the light steel lattice type framework according to the distance of 300-350mm, wherein the external dimension of the light steel lattice type framework is the same as the dimension of the opening of the main body framework;
(3) laying steel plate meshes on two sides of the light steel lattice framework or hanging thin stone and ceramic plates on the outer side of the light steel lattice framework in a dry mode, and reserving positions for door and window openings;
(4) scraping and smearing 1cm thick reinforced cement on the outer side of the steel plate net;
(5) manufacturing reserved nodes on the light steel keel, wherein the reserved nodes comprise 5 nodes for hoisting at the upper end of a PC wall body; a detachable reinforcing cross beam is fixed on the upper part of the light steel lattice type framework;
(6) laying steel plate nets on the inner leaves of the door openings of the doors and the windows; then scraping and smearing reinforced cement on the inner side of the door and window opening to finish the manufacture of the inner side of the door and window opening;
(7) completing hoisting operation through a small-tonnage traveling crane or a pulley block on the upper part of the construction space;
(8) fixing the reserved nodes in a bolting mode according to a wall design drawing, and flexibly connecting steel frameworks and beam-column contact surfaces; annular wall pressing ribs for connecting the wall are arranged on the inner side and the outer side of the column;
(9) after the light steel lattice type framework part is installed, the beam column part adopts a rectangular square frame embedding mode, the inner space and the outer space are blocked by laying steel plate meshes, glass fiber mesh cloth is coated on the edge joint, and finally reinforced cement is scraped for the second time, so that the shell structure is integrally formed on the inner wall surface and the outer wall surface.
(10) Lining a thin film geotextile in a leaf steel plate net in a light steel framework, then embedding a pipeline box in advance, and plugging the inner surface and the outer surface of a beam column part by adopting the same method;
(11) pouring lightweight concrete into the wall, and treating the beam column part in the same way;
(12) and scraping the reinforced cement on the inner side surface of the wall body, and leveling up, down, left and right.
2. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body as claimed in claim 1, wherein: the single-row keel is suitable for constructing a wall body with the wall thickness smaller than 200mm, and the double-row keel is suitable for constructing a wall body with the wall thickness larger than or equal to 200 mm.
3. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body as claimed in claim 1, wherein: the assembly site of the light steel lattice type framework is a factory workshop or a construction site.
4. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body as claimed in claim 1, wherein: the reinforced daub comprises the following components in percentage by weight: cement: 18.3%, fine sand: 64.1%, 20 mm long fiber: 0.37 percent, 0.61 percent of wood fiber, 0.061 percent of additive hydroxypropyl methyl cellulose, and the balance of water, wherein 14kg of the reinforced cement is scraped per square meter as a surface layer of a wall body.
5. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body as claimed in claim 1, wherein: the flexible connection is achieved by applying 2 cm thick polystyrene boards to the surfaces of the two sides of the post.
6. The manufacturing process of the lightweight concrete light steel skeleton PC embedded cast-in-place wall body as claimed in claim 1, wherein the installation process of the lightweight steel skeleton in the step (2) and the steel plate mesh in the step (3) is as follows:
the method comprises the following steps of leveling two steel beams which are placed in parallel according to a preset distance, extending for a certain length according to a design drawing, sequentially laying the steel beams along upper and lower guide rails embedded with light steel frameworks, then connecting vertical C-shaped keels, fixing connection points by self-tapping screws and pull rivets, nailing steel plate nets on two sides firmly by using pneumatic spiral nails, and arranging an automatic position adjusting device outside the steel beams.
7. The manufacturing process of the lightweight concrete lightweight steel frame PC embedded cast-in-place wall body as claimed in claim 1, wherein: a single PC wall body module weighs 300kg, and can use two sets of movable pulleys to hoist to the assigned position bare-handed accurate.
8. Hoisting operation according to claim 1 or 7, characterized in that: the reinforcing cross beam in the step (5) is made of 45# steel or 42CrMo steel; and a reserved node is fixed below a hoisting cable of the traveling crane in a multi-point bolting mode.
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| TW309562B (en) * | 1996-10-16 | 1997-07-01 | James Hardie Res Pty Ltd | Wall member and method of construction thereof |
| CN101032841A (en) * | 2006-03-06 | 2007-09-12 | 兰州海锋建材科技有限公司 | Single unit heat-insulating dry mortar and the producing method |
| JP2008503670A (en) * | 2004-06-21 | 2008-02-07 | ヴェリスコヴィッチェ，ピエール−ミーゼ | Isolated concrete formwork system with variable length wall connections |
| CN201874123U (en) * | 2010-02-05 | 2011-06-22 | 闫振甲 | Metal lath and plaster surface course and foamed concrete cast-in-place wall structure |
| CN103883026A (en) * | 2014-03-20 | 2014-06-25 | 中国建筑第二工程局有限公司 | Environment-friendly and energy-saving cast-in-place heat preservation composite outer wall system and construction method thereof |
| WO2016023058A1 (en) * | 2014-08-12 | 2016-02-18 | Rapperstorfer Hubert | Reinforcing element and method for producing a reinforcing element |
| CN207739434U (en) * | 2017-12-26 | 2018-08-17 | 深圳市众赢四海实业有限公司 | A kind of cast-in-place net mould wall |
-
2020
- 2020-09-02 CN CN202010909985.5A patent/CN112282145B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW309562B (en) * | 1996-10-16 | 1997-07-01 | James Hardie Res Pty Ltd | Wall member and method of construction thereof |
| JP2008503670A (en) * | 2004-06-21 | 2008-02-07 | ヴェリスコヴィッチェ，ピエール−ミーゼ | Isolated concrete formwork system with variable length wall connections |
| CN101032841A (en) * | 2006-03-06 | 2007-09-12 | 兰州海锋建材科技有限公司 | Single unit heat-insulating dry mortar and the producing method |
| CN201874123U (en) * | 2010-02-05 | 2011-06-22 | 闫振甲 | Metal lath and plaster surface course and foamed concrete cast-in-place wall structure |
| CN103883026A (en) * | 2014-03-20 | 2014-06-25 | 中国建筑第二工程局有限公司 | Environment-friendly and energy-saving cast-in-place heat preservation composite outer wall system and construction method thereof |
| WO2016023058A1 (en) * | 2014-08-12 | 2016-02-18 | Rapperstorfer Hubert | Reinforcing element and method for producing a reinforcing element |
| CN207739434U (en) * | 2017-12-26 | 2018-08-17 | 深圳市众赢四海实业有限公司 | A kind of cast-in-place net mould wall |
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Effective date of registration: 20221111 Address after: 116113 Maoyingzi village, Dalian Bay Street, Ganjingzi District, Dalian City, Liaoning Province Patentee after: Centennial housing (Dalian) Construction Technology Development Co.,Ltd. Address before: Room 813, free trade building, Dalian Free Trade Zone, Liaoning 116011 Patentee before: Zhonghe Tiancheng (Dalian) Technology Development Co.,Ltd. |