CN114704028B - Construction method for improving molding quality of bare concrete inverted trapezoid multi-ribbed beam - Google Patents
Construction method for improving molding quality of bare concrete inverted trapezoid multi-ribbed beam Download PDFInfo
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- CN114704028B CN114704028B CN202210549607.XA CN202210549607A CN114704028B CN 114704028 B CN114704028 B CN 114704028B CN 202210549607 A CN202210549607 A CN 202210549607A CN 114704028 B CN114704028 B CN 114704028B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention provides a construction method for improving the molding quality of an inverted trapezoid multi-ribbed beam of bare concrete, which comprises the following steps: machining a multi-ribbed beam bottom template, grooving a bottom plate, assembling the multi-ribbed beam bottom template, carrying out local treatment, erecting a template support, installing the multi-ribbed beam template, binding steel bars of the multi-ribbed beam and carrying out concrete pouring construction. The construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam solves the problem that the molding quality is poor in the existing multi-ribbed beam construction process by improving the existing multi-ribbed beam bottom template and the existing multi-ribbed beam construction process.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a construction method for improving the molding quality of an inverted trapezoid multi-ribbed beam of bare concrete.
Background
The bare concrete is mostly vertical members such as walls, columns and the like, but with the improvement of the aesthetic requirements of the building, more and more large-area horizontal structures are adopted, and the engineering of the bare concrete is adopted. As shown in fig. 1, which is a cross-sectional view of a typical bare concrete multi-ribbed beam plate, is commonly used in large span, and beam-height limited building structures. The bare concrete multi-ribbed beam plate has the advantages that the original color of the concrete is kept, other decorations are not made, the environment-friendly concept is reflected, and the bare concrete multi-ribbed beam plate has very important significance in saving energy and avoiding resource consumption. In addition, the bare concrete construction, one-time molding avoids the secondary mass repair and plastering, is beneficial to civilized construction, and easily appears in the existing multi-ribbed beam construction process: the problems of the arc and beam side dimension deviation, slurry leakage at the joint and the like cause poor forming quality of the multi-ribbed beam, and the problem of solving the two quality problems is a key for improving the construction quality of the multi-ribbed beam.
Disclosure of Invention
The embodiment of the invention provides a construction method for improving the molding quality of an inverted trapezoid multi-ribbed beam of bare concrete, which solves the problem that the molding quality is poor in the existing multi-ribbed beam construction process by improving the existing multi-ribbed beam bottom template and the existing multi-ribbed beam construction process.
In view of the above problems, the technical scheme provided by the invention is as follows:
a construction method for improving the molding quality of an inverted trapezoid multi-ribbed beam of bare concrete comprises the following steps:
s1, processing a multi-ribbed beam bottom template, wherein the multi-ribbed beam bottom template comprises a vertical plate, a bottom plate, a trapezoid plate and an arc plate, wherein the vertical plate and the bottom plate are manufactured by adopting a 15mm thick laminated multilayer plate, and the bottom plate and the vertical plate are processed into a trapezoid template with the thickness of 95 degrees;
s2, grooving the bottom plate, and sequentially forming a first groove and a second groove on two sides of the top of the bottom plate respectively;
s3, assembling a multi-ribbed beam bottom template, namely clamping one side of the arc plate with one side of the first groove, keeping the other side of one side of the arc plate flush with the top of the vertical plate, assembling a bottom plate and the vertical plate by using a steam nail gun, reinforcing the included angle between the vertical plate and the bottom plate by using battens according to strength, assembling the arc plate, the vertical plate, the trapezoid plate and the bottom plate by using steam nails, arranging the trapezoid plate in the middle of the bottom plate, and filling foaming glue at the assembling positions of the vertical plate, the bottom plate and the arc plate after assembling;
s4, locally treating, namely repairing glass cement or waterproof putty at the joint of the arc-shaped plate and the bottom plate, and polishing or repairing the joint of the arc-shaped plate and the vertical plate;
s5, erecting a template support, namely supporting two support upright posts at the bottom of a beam by adopting a fastener type scaffold below a multi-ribbed beam, wherein the distance is 600 multiplied by 400, the two support upright posts are arranged between the multi-ribbed beam along the span direction, the maximum distance between the upright posts is not more than 600mm, the step distance is 1200mm, 4 phi 16 split bolts are adopted at two sides of the multi-ribbed beam, three horizontal bracing pieces are arranged at the bottom, the top and the middle position, one vertical bracing piece is respectively arranged at the bottom, the four sides of the vertical bracing piece are sealed, and one bottom-to-top bracing piece is arranged at every fourth row of upright posts;
s6, installing a multi-ribbed beam template, installing a multi-ribbed beam bottom template and a common wood template on the multi-ribbed beam, and supporting through a template bracket;
s7, binding multi-ribbed steel bars; binding the multi-ribbed beam steel bar prestressed tendons after the beam bottom die is erected, and binding according to a steel bar construction scheme and a prestressed steel bar construction scheme;
s8, concrete pouring construction is carried out, and the formwork is dismantled when the concrete strength reaches the requirements specified by the scheme and is not lower than 10 Mpa.
As a preferable technical scheme of the invention, the arc-shaped plate is made of PVC, the thickness of the arc-shaped plate is 3.5mm, the radius of the arc-shaped plate is 50mm, and the joint of the arc-shaped plate and the bottom plate is flush.
As a preferable technical scheme of the invention, the cross sections of the vertical plate and the bottom plate are trapezoid, the obtuse angle dimension of the trapezoid is 95 degrees, the bottom edge width of the bottom plate is 528m, the height of the bottom plate is 15mm, and the height of the vertical plate is 46mm.
As a preferable technical scheme of the invention, in the step S6, a sponge strip is arranged at the joint of the multi-ribbed beam bottom template and the common wood template for preventing slurry leakage.
In the step S5 and the step S6, when the formwork support system is set up, the frame beam support is firstly installed, then the dense rib plate support is installed, the frame beam support and the dense rib plate support are respectively formed into a system and are mutually connected so as to be convenient for separation and disassembly, and the formwork is arranged from the middle to two ends in one column grid on the axis of the elastic rib and the position line of the formwork on the bottom die of the beam so as to avoid the phenomenon that accumulated errors are generated and ribs at two ends are unequal.
As a preferred embodiment of the present invention, the step S8 includes:
s81, pouring concrete, and pouring and blanking in a sectional pouring mode;
s82, removing the formwork, loosening an adjusting nut for supporting the jacking, firstly, dropping down a main secondary keel, then removing the secondary keel, removing square timber tie bars and bamboo plywood for the joint of the formwork by using 1 small sledge rod with the diameter of 14mm and the length of 50cm, taking the timber edge as a fulcrum by using the small sledge rod, firstly, prizing the middle points of two opposite sides of the formwork, still taking the timber edge as the fulcrum after the formwork is loosened, prizing the inner rib of the formwork footing, lightly prizing the formwork downwards, ensuring that the formwork is not easy to remove, adopting a pneumatic demolding process, removing the main keel after the formwork is loosened, then removing the uppermost horizontal support of the supporting system, and finally removing the formwork of the supporting system, wherein the demolding can not be forcefully overturned, and the formwork is not thrown randomly, and is gently taken and is prevented from damage.
Compared with the prior art, the invention has the beneficial effects that: the construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam solves the problem that the molding quality is poor in the existing multi-ribbed beam construction process easily by improving the existing multi-ribbed beam bottom template and the existing multi-ribbed beam construction process.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
FIG. 1 is a schematic view of a multi-ribbed beam support structure in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of an arrangement structure of a multi-ribbed beam bottom upright post disclosed in an embodiment of the invention;
FIG. 3 is a schematic view of a prior art disclosed multi-ribbed beam bottom pattern plate;
FIG. 4 is an enlarged schematic view of the structure shown at A in FIG. 3;
FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 3;
fig. 6 is a schematic flow chart of a construction method for improving the molding quality of the bare concrete inverted trapezoidal multi-ribbed beam, which is disclosed by the embodiment of the invention.
Reference numerals: 1. a vertical plate; 2. a bottom plate; 21. a first groove; 22. a second groove; 3. a trapezoidal plate; 4. an arc-shaped plate; 5. foaming glue.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
As shown in fig. 1-6, a construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam comprises the following steps:
s1, processing a multi-ribbed beam bottom template, wherein the multi-ribbed beam bottom template comprises a vertical plate 1, a bottom plate 2, a trapezoid plate 3 and an arc plate 4, wherein the vertical plate 1 and the bottom plate 2 are manufactured by adopting a 15mm thick film-coated multilayer plate, and the bottom plate 2 and the vertical plate 1 are processed into a trapezoid template with the thickness of 95 degrees;
specifically, the material of arc 4 is PVC, and the thickness of arc 4 is 3.5mm, and the radius of arc 4 is 50mm, and arc 4 flushes with bottom plate 2 junction, and riser 1 and bottom plate 2's cross-sectional shape is trapezoidal, and trapezoidal obtuse angle size is 95, and bottom edge width of bottom plate 2 is 528m, and bottom plate 2 highly is 15mm, and riser 1 highly is 46mm.
S2, grooving the bottom plate 2, and sequentially forming a first groove 21 and a second groove 22 on two sides of the top of the bottom plate 2;
the first groove 21 is specifically used for ensuring that the arc-shaped plate 4 and the bottom plate 2 and the arc-shaped plate 4 are ensured to be on the same horizontal plane, and the second groove 22 is specifically used for ensuring that the arc-shaped plate 4 and the vertical plate 1 are ensured to be on the same plane.
S3, assembling the multi-ribbed beam bottom template, namely clamping one side of the arc-shaped plate 4 with one side of the first groove 21, keeping the other side of one side of the arc-shaped plate 4 flush with the top of the vertical plate 1, assembling the bottom plate 2 and the vertical plate 1 by using a steam nail gun, reinforcing the included angle between the vertical plate 1 and the bottom plate 2 by using wood strips according to strength, assembling the arc-shaped plate 4, the vertical plate 1, the trapezoid plate 3 and the bottom plate 2 by using steam nails, arranging the trapezoid plate 3 in the middle of the bottom plate 2, and filling foaming glue 5 at the assembling positions of the vertical plate 1, the bottom plate 2 and the arc-shaped plate 4 after assembling;
s4, locally treating, namely repairing glass cement or waterproof putty at the joint of the arc-shaped plate 4 and the bottom plate 2, and polishing or repairing glue at the joint of the arc-shaped plate 4 and the vertical plate 1;
s5, erecting a template support, namely supporting two support upright posts at the bottom of a beam by adopting a fastener type scaffold below a multi-ribbed beam, wherein the distance is 600 multiplied by 400, the two support upright posts are arranged between the multi-ribbed beam along the span direction, the maximum distance between the upright posts is not more than 600mm, the step distance is 1200mm, 4 phi 16 split bolts are adopted at two sides of the multi-ribbed beam, three horizontal bracing pieces are arranged at the bottom, the top and the middle position, one vertical bracing piece is respectively arranged at the bottom, the four sides of the vertical bracing piece are sealed, and one bottom-to-top bracing piece is arranged at every fourth row of upright posts;
s6, installing a multi-ribbed beam template, namely installing a multi-ribbed beam bottom template and a common wood template on the multi-ribbed beam, supporting the multi-ribbed beam bottom template and the common wood template through a template support, wherein sponge strips are arranged at the joint of the multi-ribbed beam bottom template and the common wood template and used for preventing slurry leakage, firstly installing a frame beam support when a template support system is erected, then installing a multi-ribbed plate support, respectively forming a system with the frame beam support and the multi-ribbed plate support, and mutually connecting the frame beam support and the multi-ribbed plate support so as to facilitate separation and disassembly, and arranging a shuttering from the middle to two ends in one column grid on a beam bottom die along with a shuttering position line so as to avoid accumulated errors and unequal ribs at two ends;
specifically, 1, familiarizing with drawings, and determining the division of a flowing water section according to the type and the characteristics of an engineering structure; determining the plane arrangement of the templates, and the specification, the number and the arrangement size of the longitudinal and transverse main keels; meanwhile, determining a combination mode of the shuttering, wherein the shuttering is a template on the surface of the dense rib beam, and comprises a bottom template, a place which is not enough in modulus or can not support the shuttering is replaced by a wood template, the strength, the rigidity and the stability of the shuttering and a bracket are checked, a design diagram of a complete set of shuttering templates and a bracket system is drawn, wherein the design diagram comprises a template plane layout general diagram, a sectional plane diagram, an assembly diagram of the shuttering and the bracket, a node large sample diagram and a part processing diagram, if the shuttering side lengths are unequal, main keels (steel pipes) are arranged according to the short side directions, and secondary keels are arranged according to the long side directions; according to the size of the gap between the bottom edges of the mould shells, the edge joint battens can also adopt a shaping steel template or other materials matched with the mould shells, the longitudinal wood Fang Diantiao and the edge joint bamboo plywood are arranged in a through length mode along the direction of the secondary joists, and the transverse wood Fang Diantiao and the edge joint bamboo plywood are arranged in a disconnected mode;
2. when the formwork support system is erected, firstly, a frame beam support is installed, then, a dense rib plate support is installed, and the frame beam support and the dense rib plate support are respectively formed into a system and are connected with each other so as to be convenient to separate and disassemble, and the intervals of the upright rods, the transverse struts and the diagonal struts of the support system are required to meet the requirements of construction load and construction organization design, so that the construction safety is ensured;
3. the main joists are required to be pulled through when being installed, the distance is required to be accurate, and the main joists are required to be horizontal and vertical;
4. before the wood below the rib is installed, the edge line of the mould shell is paid out on the main keel, namely, the position line of the dense rib is accurately paid out, so that the axis position of the wood below the rib (namely, the dense rib) is accurate;
5. arranging a mould shell from the middle to two ends in a column grid to avoid accumulated errors, namely arranging a mould shell on a bottom mould of the beam, finely adjusting a jacking screw rod after arranging the mould shell, observing the horizontal by eyes, detecting by using a level gauge to ensure that the horizontal error between the mould shells is less than 2mm, arching according to design requirements, and when the design is not required, the arching height is 1/1000-3/1000 of the full span length;
6. after checking and confirming that the position of the shuttering is correct, splicing shuttering gaps, firstly, installing a transverse wood Fang Diantiao and a transverse joint bamboo plywood according to a longitudinal wood Fang Diantiao and a longitudinal joint bamboo plywood;
7. checking the shuttering templates item by item according to the quality evaluation standard of the shuttering project, wherein the checking focus is on the ensuring measure of the rigidity of the shuttering and the tightness of the connecting node;
8. the shuttering mounting gap is sealed by adhesive tape to prevent slurry leakage, the air holes are reserved and blocked, and water soluble release agent is coated after the shuttering is mounted.
S7, binding multi-ribbed steel bars; binding the multi-ribbed beam steel bar prestressed tendons after the beam bottom die is erected, and binding according to a steel bar construction scheme and a prestressed steel bar construction scheme;
s8, concrete pouring construction is carried out, and the formwork is dismantled when the concrete strength reaches the requirements specified by the scheme and is not lower than 10 Mpa;
specifically, step S8 includes:
s81, pouring concrete, wherein the casting and blanking are performed in a sectional casting mode, and the centralized blanking is not needed when the concrete is poured, so that the die shell is prevented from being damaged due to overlarge impact force, and the construction load of the die shell is prevented from overlarge. Curing the concrete in time after final setting, and preventing cracks from being generated due to water evaporation;
s82, removing the formwork, loosening an adjusting nut for supporting the jacking, firstly, dropping down a main secondary keel, then removing the secondary keel, removing square timber tie bars and bamboo plywood for the joint of the formwork by using 1 small sledge rod with the diameter of 14mm and the length of 50cm, taking the timber edge as a fulcrum by using the small sledge rod, firstly, prizing the middle points of two opposite sides of the formwork, still taking the timber edge as the fulcrum after the formwork is loosened, prizing the inner rib of the formwork footing, lightly prizing the formwork downwards, ensuring that the formwork is not easy to remove, adopting a pneumatic demolding process, removing the main keel after the formwork is loosened, then removing the uppermost horizontal support of the supporting system, and finally removing the formwork of the supporting system, wherein the demolding can not be forcefully overturned, and the formwork is not thrown randomly, and is gently taken and is prevented from damage.
The construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam solves the problem that the molding quality is poor in the existing multi-ribbed beam construction process easily by improving the existing multi-ribbed beam bottom template and the existing multi-ribbed beam construction process.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (2)
1. The construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam is characterized by comprising the following steps of:
s1, processing a multi-ribbed beam bottom template, wherein the multi-ribbed beam bottom template comprises a vertical plate, a bottom plate, a trapezoid plate and an arc plate, wherein the vertical plate and the bottom plate are manufactured by adopting a 15mm thick laminated multilayer plate, and the bottom plate and the vertical plate are processed into a trapezoid template with the thickness of 95 degrees;
s2, grooving the bottom plate, and sequentially forming a first groove and a second groove on two sides of the top of the bottom plate respectively;
the arc-shaped plate is made of PVC, the thickness of the arc-shaped plate is 3.5mm, the radius of the arc-shaped plate is 50mm, and the joint of the arc-shaped plate and the bottom plate is flush;
the cross sections of the vertical plate and the bottom plate are trapezoid, the obtuse angle dimension of the trapezoid is 95 degrees, the width of the bottom edge of the bottom plate is 528m, the height of the bottom plate is 15mm, and the height of the vertical plate is 46mm;
s3, assembling a multi-ribbed beam bottom template, namely clamping one side of the arc plate with one side of the first groove, keeping the other side of one side of the arc plate flush with the top of the vertical plate, assembling a bottom plate and the vertical plate by using a steam nail gun, reinforcing the included angle between the vertical plate and the bottom plate by using battens according to strength, assembling the arc plate, the vertical plate, the trapezoid plate and the bottom plate by using steam nails, arranging the trapezoid plate in the middle of the bottom plate, and filling foaming glue at the assembling positions of the vertical plate, the bottom plate and the arc plate after assembling;
s4, locally treating, namely repairing glass cement or waterproof putty at the joint of the arc-shaped plate and the bottom plate, and polishing or repairing the joint of the arc-shaped plate and the vertical plate;
s5, erecting a template support, namely supporting two support upright posts at the bottom of a beam by adopting a fastener type scaffold below a multi-ribbed beam, wherein the distance is 600 multiplied by 400, the two support upright posts are arranged between the multi-ribbed beam along the span direction, the maximum distance between the upright posts is not more than 600mm, the step distance is 1200mm, 4 phi 16 split bolts are adopted at two sides of the multi-ribbed beam, three horizontal bracing pieces are arranged at the bottom, the top and the middle position, one vertical bracing piece is respectively arranged at the bottom, the four sides of the vertical bracing piece are sealed, and one bottom-to-top bracing piece is arranged at every fourth row of upright posts;
s6, installing a multi-ribbed beam template, installing a multi-ribbed beam bottom template and a common wood template on the multi-ribbed beam, and supporting through a template bracket;
in the step S6, sponge strips are arranged at the joint of the dense rib beam bottom template and the common wood template and used for preventing slurry leakage;
in the step S5 and the step S6, when a formwork support system is erected, a frame beam support is firstly installed, then a dense rib plate support is installed, the frame beam support and the dense rib plate support are respectively formed into a system and are mutually connected so as to be convenient to separate and disassemble, a formwork is arranged from the middle to two ends in one column grid on the axis of a spring rib and a formwork position line of a beam bottom die, and the phenomenon that ribs at two ends are unequal is avoided;
s7, binding multi-ribbed steel bars; binding the multi-ribbed beam steel bar prestressed tendons after the beam bottom die is erected, and binding according to a steel bar construction scheme and a prestressed steel bar construction scheme;
s8, concrete pouring construction is carried out, and the formwork is dismantled when the concrete strength reaches the requirements specified by the scheme and is not lower than 10 Mpa.
2. The construction method for improving the molding quality of the bare concrete inverted trapezoid multi-ribbed beam according to claim 1, which is characterized by comprising the following steps: the step S8 includes:
s81, pouring concrete, and pouring and blanking in a sectional pouring mode;
s82, removing the formwork, loosening an adjusting nut for supporting the jacking, firstly, dropping down a main secondary keel, then removing the secondary keel, removing square timber tie bars and bamboo plywood for the joint of the formwork by using 1 small sledge rod with the diameter of 14mm and the length of 50cm, taking the timber edge as a fulcrum by using the small sledge rod, firstly, prizing the middle points of two opposite sides of the formwork, still taking the timber edge as the fulcrum after the formwork is loosened, prizing the inner rib of the formwork footing, lightly prizing the formwork downwards, ensuring that the formwork is not easy to remove, adopting a pneumatic demolding process, removing the main keel after the formwork is loosened, then removing the uppermost horizontal support of the supporting system, and finally removing the formwork of the supporting system, wherein the demolding can not be forcefully overturned, and the formwork is not thrown randomly, and is gently taken and is prevented from damage.
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| Application Number | Priority Date | Filing Date | Title |
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| SE327808B (en) * | 1968-01-24 | 1970-08-31 | L Norlander | |
| CN101886470B (en) * | 2010-07-20 | 2012-05-30 | 中国建筑第八工程局有限公司 | Construction method of exposed concrete ribbed beams |
| CN103806647A (en) * | 2012-11-06 | 2014-05-21 | 江苏武进建筑安装工程有限公司 | Assembly and disassembly process for large-span concrete bidirectional dense rib beam formwork case |
| CN207079914U (en) * | 2017-06-16 | 2018-03-09 | 青岛一建集团有限公司 | The multi-ribbed plate putamina construction installed for beam bottom mother plate |
| CN111395620B (en) * | 2020-04-22 | 2022-01-28 | 重庆海申应用技术研究院有限公司 | Construction method of dense-rib floor system with reusable mold box |
| CN112761292A (en) * | 2021-03-01 | 2021-05-07 | 中建八局发展建设有限公司 | Construction method for prefabricated ribbed cavity floor slab |
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