CN116971634A - Safety protection construction method for horizontal tunnel portal of floor - Google Patents
Safety protection construction method for horizontal tunnel portal of floor Download PDFInfo
- Publication number
- CN116971634A CN116971634A CN202311074662.9A CN202311074662A CN116971634A CN 116971634 A CN116971634 A CN 116971634A CN 202311074662 A CN202311074662 A CN 202311074662A CN 116971634 A CN116971634 A CN 116971634A
- Authority
- CN
- China
- Prior art keywords
- steel bars
- floor
- bearing steel
- hole
- construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 66
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 107
- 239000010959 steel Substances 0.000 claims abstract description 107
- 239000002023 wood Substances 0.000 claims abstract description 47
- 239000011120 plywood Substances 0.000 claims abstract description 46
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 30
- 239000004567 concrete Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000007728 cost analysis Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3204—Safety or protective measures for persons during the construction of buildings against falling down
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a floor horizontal hole safety protection construction method, in the floor steel bar arrangement process, bearing steel bars are also arranged longitudinally and transversely at the horizontal hole to form a steel bar net sheet, a wood plywood is arranged on the steel bar net sheet, the end heads of the bearing steel bars extend into the floor steel bars and are fixed with the floor steel bars, later concrete is poured to fix the bearing steel bars and the floor into a whole, so that the wood plywood is supported to form a floor horizontal hole safety protection structure, and later the wood plywood and the bearing steel bars are removed when the horizontal hole is required to be constructed. In the floor construction process of the cast-in-place concrete frame structure, the reinforcing mesh sheets are arranged at the upper openings of the reserved holes in advance and the wood plywood is paved, so that the early protection structure of the holes is formed, the components are manufactured in advance, the construction waste is reduced, the environment is kept clean and orderly, the construction period is short, and the protection work can be safely and effectively completed.
Description
Technical Field
The invention relates to a floor horizontal tunnel portal safety protection construction method, and belongs to the technical field of building construction methods.
Background
In the construction process of a cast-in-place concrete structure, due to the influence of factors such as construction procedures, construction cost, construction period and the like, most of safety protection of reserved holes such as an elevator shaft, a lighting shaft, a pipeline shaft and the like of an operation surface on a construction site has hysteresis conditions, wherein the number of structural floors is large, the reserved holes on the inner plane of each floor are large, at present, steel pipe fasteners are generally used for temporary protection, and sealing construction is carried out after the support frame body and the wood plywood are dismantled. And building a scaffold with a steel pipe with a larger hole size, and paving a wood plywood for sealing. The safety protection measures have larger potential safety hazards, and great safety accidents are very easy to occur when workers perform construction operation on an operation surface.
Disclosure of Invention
The invention aims to provide a floor horizontal tunnel portal safety protection construction method. The method for penetrating the plate bars through the whole hole in the manufacturing and installation of the floor steel bars is adopted, the hole is effectively sealed in advance, and the problem that the hole is not protected timely in construction operation is solved.
The technical scheme of the invention is as follows: the floor horizontal hole safety protection construction method comprises the steps that in the floor steel bar arrangement process, bearing steel bars are also arranged longitudinally and transversely in a staggered mode at the horizontal hole to form a steel bar net sheet, a wood plywood is arranged on the steel bar net sheet, the end heads of the bearing steel bars extend into the floor steel bars and are fixed with the floor steel bars, later-stage concrete pouring is carried out to fix the bearing steel bars and the floor to form a whole, so that the wood plywood is supported to form a floor horizontal hole safety protection structure, and the wood plywood and the bearing steel bars are removed when the horizontal hole is required to be constructed in the later stage.
In the floor horizontal hole safety protection construction method, the concrete construction comprises the following steps:
a: preparation for construction
(1) Familiarizing drawings, determining the size and the position of a reserved horizontal hole, and drawing plan drawing label related information; before implementation, technical engagement is carried out on construction teams and construction operators, so that the operators participating in construction master the construction process and requirements related to the construction method;
(2) After the strength of the concrete is determined, the bearing capacity of the bearing steel bars is checked, and the diameter of the bearing steel bars is determined;
(3) Preparing required bearing steel bars, binding iron wires and wood plywood related materials, wherein the materials are qualified through quality detection;
b: wood plywood and bearing reinforcing bar installation acceptance
(1) The wood plywood used for the cladding is manufactured in advance according to the size of the plane hole of the drawing;
(2) The opening of the side beam or the wall template of the hole can be opened according to the size of the hole and the spacing between the reinforcing bars;
(3) Carrying out blanking according to the calculated size of the calculation book in the manufacturing process of the bearing steel bar, and checking the size of the machined component by a technician before installation;
(4) The hole bearing steel bars are installed and bound with the floor steel bars of the field operation layer, the installation height is the same as that of the plate steel bars, and the hole bearing steel bars and the floor steel bars are firmly bound;
(5) Fixing the wood plywood;
c: concrete pouring
Adopting anti-collapse measures for the anchoring section of the bearing steel bar at the opening in the concrete pouring process, ensuring the thickness of the protective layer of the bearing steel bar, and compacting by vibrating;
d: dismantling of wood plywood
Removing the side templates of the structural members, wherein the side templates can be rotated to an upper-layer operation surface for continuous use, and the protective wood plywood on the opening is removed according to the construction progress condition;
e: demolishing of reinforcing mesh at opening
When no longer needing the entrance to a cave protection, can bear reinforcing bar recycle, cut and bear the weight of the reinforcing bar and should go on cutting operation from high to low, excision from the reinforcing bar net piece lower part with the double ladder, can follow the face and excision when there is not vertical structure around the entrance to a cave face, the tangent plane uses rust protection paint to brush after the structure reinforcing bar cutting is accomplished can.
In the construction method for safety protection of the horizontal tunnel portal of the floor, in the step E, in the dismantling process of the reinforcing steel meshes of the tunnel portal, a fire receiving hopper is used for preventing fire disaster during cutting.
In the floor horizontal opening safety protection construction method, the arrangement space of the bearing steel bars is 200mm, and the bearing steel bars are arranged close to the edge of the opening according to 100 mm.
In the floor horizontal hole safety protection construction method, when no beam member is arranged around the horizontal hole, the bearing steel bars are overlapped with the upper steel bars of the floor slab steel bars, and the overlapping length is lle; when shear walls or beam members are arranged around the horizontal hole, bearing steel bars around the hole extend to longitudinal ribs on the inner side of the support and then are bent for 15d, and when the lengths of the straight sections are respectively more than or equal to la and more than or equal to laE, the bearing steel bars can not be bent.
The invention has the beneficial effects that: compared with the prior art, in the floor construction process of the cast-in-place concrete frame structure, the pre-protection structure for the hole is formed by installing the reinforcing steel mesh and paving the wood plywood on the upper opening of the reserved hole in advance, the components are manufactured in advance, the construction waste is not required to be processed on site, the generation of the construction waste is reduced, the environment is kept clean and orderly, the construction period is short, and the protection work can be safely and effectively completed. The method can be used for protecting all holes of cast-in-situ reinforced concrete structural engineering, ensures the personal safety of workers in construction, is favorable for safe civilized construction, and has obvious social benefit and environmental benefit.
The invention effectively seals the hole in advance, and solves the problem of untimely protection of the hole in construction operation. The invention also has the characteristics of convenient construction, high benefit, good stability and the like. The steel bars can be recycled after use, so that the energy-saving and environment-friendly benefits are high, the prospect is wide, and the popularization is worth.
The advantages are embodied in the following aspects:
1. simple structure, construction safety and reliability: when the operation surface is used for manufacturing and installing the bearing steel bars, the bearing steel bars are sequentially installed along the hole at intervals, the installation height is equal to that of the steel bars on the upper part of the floor, and the installation quantity and the installation size are calculated according to the size of the hole. The distance between the bearing steel bars and the edges of the hole is convenient to disassemble and can be properly adjusted in consideration of the wood plywood.
2. High safety performance and low engineering cost: form and bear the weight of the reinforcing bar net piece when the operation face carries out construction operation, lay and fix the appropriate wood plywood of size on the net piece, structural concrete pours the back, and the bearing capacity of reinforcing bar net piece obtains great promotion, and later stage wood plywood, support frame are demolishd and all can effectually prevent personnel from falling and falling the condition emergence that the thing hurts the people from the eminence when carrying out other operations, ensure operating personnel's personal safety.
3. The construction benefit is improved: the side template configuration and manufacturing are only needed to be carried out on the first layer, and then the side template is turned over to be installed on the upper layer along with the progress. The middle protection is formed at one time, and protection sealing is finished in advance.
4. The construction site is checked according to the construction progress requirement, and when the protection is not required, the wood plywood on the surface is removed in sequence for turnover utilization, and the reinforcing mesh can be used for being processed into reinforcing bars in other forms after being cut off, or is used for turnover to a proper position in engineering.
Drawings
FIG. 1 is a plan view of a horizontal portal of the present invention without beam members around the portal;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a cross-sectional view of the present invention with shear wall or beam members around the horizontal hole;
fig. 4 is a flow chart of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Embodiments of the invention: the floor horizontal hole safety protection construction method comprises the steps that in the floor steel bar arrangement process, bearing steel bars are also arranged longitudinally and transversely at the horizontal hole to form a steel bar net sheet, a wood plywood is arranged on the steel bar net sheet, the end heads of the bearing steel bars extend into the floor steel bars and are fixed with the floor steel bars together, the bearing steel bars and the floor are fixed to form a whole under the action of concrete in the later concrete pouring process, so that the wood plywood is supported to form a floor horizontal hole safety protection structure, and the wood plywood and the bearing steel bars are removed when the horizontal hole is required to be constructed in the later stage.
In the construction of the multi-storey floor structure, the wood plywood of the operation surface is slightly adjusted, the bearing steel bars are subjected to calculation and blanking according to relevant specifications and hole sizes, the bearing steel bars are installed above corresponding holes to be bound firmly to form steel bar meshes, and the wood plywood with the corresponding hole sizes is paved on the steel bar meshes to be sealed to serve as a reserved horizontal hole safety protection. After the concrete pouring is finished, the concrete pouring device can be used as a plane pedal for subsequent work. The wood plywood is clamped into the horizontal hole, the size of the wood plywood is matched with the horizontal hole, and when a person steps on the wood plywood, the wood plywood cannot be displaced, so that the protection effect is very good. Even if the wood plywood is damaged, the bottom is provided with a reinforcing mesh, so that secondary protection can be realized.
As shown in fig. 4, the concrete construction includes the steps of:
a: preparation for construction
(1) Familiarizing drawings, determining the size and the position of a reserved horizontal hole, and drawing plan drawing label related information; before implementation, technical engagement is carried out on construction teams and construction operators, so that the operators participating in construction master the construction process and requirements related to the construction method.
(2) And (5) after the strength of the concrete is determined, checking the bearing capacity of the bearing steel bars, and determining the diameter of the bearing steel bars.
(3) Preparing needed bearing steel bars, binding iron wires, wood plywood and other related materials, wherein the materials are qualified through quality detection.
B: wood plywood and bearing reinforcing bar installation acceptance
(1) The wood plywood used for the cladding is manufactured in advance according to the size of the plane hole of the drawing.
(2) The opening of the side beam or the wall template of the opening can be opened according to the size of the opening and the spacing between the reinforcing bars.
(3) And carrying out blanking according to the calculated size of the calculation book in the manufacturing process of the bearing steel bar, and checking the size of the machined component by a technician before installation.
(4) The hole bearing steel bar is installed and bound with the floor steel bar of the field operation layer, the installation height is the same as the plate surface steel bar, the hole bearing steel bar is firmly bound with the floor steel bar, and project management personnel carry out acceptance inspection.
(5) And fixing the wood plywood.
C: concrete pouring
And in the concrete pouring process, anti-collapse measures are adopted for the anchoring section of the bearing reinforcing steel bar at the opening, so that the thickness of the protective layer of the bearing reinforcing steel bar is ensured, and the vibration is compact.
D: dismantling of wood plywood
And (3) dismantling the side templates of the structural members, wherein the side templates can be rotated to an upper-layer operation surface to be used continuously, and the protective wood plywood on the opening is dismantled according to the construction progress condition.
E: demolishing of reinforcing mesh at opening
When no longer needing the entrance to a cave protection, can bear reinforcing bar recycle, the cutting bears the reinforcing bar from high to low cutting operation that carries out, excision from the reinforcing bar net piece lower part with the double ladder, can follow the face and excision when there is not vertical structure around the entrance to a cave face, the tangent plane uses rust-resistant paint to scribble after the structural reinforcement cutting is accomplished can, uses the receiver to prevent the conflagration emergence during the cutting.
When carrying the arrangement of reinforcing bars, there are mainly two forms:
as shown in fig. 1-2, when there is no beam member around the horizontal portal: when the edge of the hole is beam-free, the bearing steel bars are overlapped with the steel bars on the upper part of the floor slab, the overlapping length is lle, the distance between the bearing steel bars is 200mm, the distance between the bearing steel bars and the edge of the hole can be set to be 100mm, and the distance between the bearing steel bars and the steel bars of the floor slab can be considered.
As shown in fig. 3, when shear walls or beam members are provided around the horizontal hole: the bearing steel bars around the hole should stretch to the inner side longitudinal bars of the support in the end support and then bend for 15d, when the lengths of the straight sections are respectively equal to or more than la and equal to or more than laE, the bearing steel bars can not bend, the distance between the steel bars is 200mm, and the bearing steel bars can be arranged close to the edge of the hole by 100 mm.
The invention does not need to carry out secondary reinforcement during construction, thereby saving a great deal of labor cost. Compared with the existing shaping protection used in engineering, the fastener type steel pipe scaffold built in the pit has obvious effect of saving the material input cost. When no protection is needed, the steel bars and the wood plywood can be recycled. Accounting savings costs are shown in table 1 below:
TABLE 1 cost analysis Table (Unit: yuan)
(1) Scheme one (traditional steel pipe erection and edge protection): wood worker work charge 350 yuan/day, rack worker work charge 350 yuan/day, steel pipe leasing (1 meter): 0.0126 yuan/day, fastener (1): 0.0093/day; the template (recyclable) material costs a total cost of 2565.1 yuan per 365 days.
(2) Scheme II (protection of embedded bars): 68 yuan per square (including blanking, binding, installing and dismantling) of a reinforcing bar worker, 350 yuan per day of a woodworking, and the reinforcing bar and the template can be recycled; costs 1710 yuan are required.
The two schemes are compared with the scheme cost section 855.1 yuan, and the subsequent maintenance cost of the scheme is not counted.
Claims (5)
1. The floor horizontal portal safety protection construction method is characterized by comprising the following steps of: in the floor steel bar arrangement process, bearing steel bars are also arranged longitudinally and transversely at the horizontal hole to form a steel bar net sheet, a wood plywood is arranged on the steel bar net sheet, the end heads of the bearing steel bars extend into the floor steel bars and are fixed with the floor steel bars, later-stage casting concrete fixes the bearing steel bars and the floor to form a whole, so that the wood plywood is supported to form a floor horizontal hole safety protection structure, and the wood plywood and the bearing steel bars are removed when the horizontal hole is required to be constructed in the later stage.
2. The floor level entrance to a cave safety protection construction method as claimed in claim 1, wherein: the concrete construction comprises the following steps:
a: preparation for construction
(1) Familiarizing drawings, determining the size and the position of a reserved horizontal hole, and drawing plan drawing label related information; before implementation, technical engagement is carried out on construction teams and construction operators, so that the operators participating in construction master the construction process and requirements related to the construction method;
(2) After the strength of the concrete is determined, the bearing capacity of the bearing steel bars is checked, and the diameter of the bearing steel bars is determined;
(3) Preparing required bearing steel bars, binding iron wires and wood plywood related materials, wherein the materials are qualified through quality detection;
b: wood plywood and bearing reinforcing bar installation acceptance
(1) The wood plywood used for the cladding is manufactured in advance according to the size of the plane hole of the drawing;
(2) The opening of the side beam or the wall template of the hole can be opened according to the size of the hole and the spacing between the reinforcing bars;
(3) Carrying out blanking according to the calculated size of the calculation book in the manufacturing process of the bearing steel bar, and checking the size of the machined component by a technician before installation;
(4) The hole bearing steel bars are installed and bound with the floor steel bars of the field operation layer, the installation height is the same as that of the plate steel bars, and the hole bearing steel bars and the floor steel bars are firmly bound;
(5) Fixing the wood plywood;
c: concrete pouring
Adopting anti-collapse measures for the anchoring section of the bearing steel bar at the opening in the concrete pouring process, ensuring the thickness of the protective layer of the bearing steel bar, and compacting by vibrating;
d: dismantling of wood plywood
Removing the side templates of the structural members, wherein the side templates can be rotated to an upper-layer operation surface for continuous use, and the protective wood plywood on the opening is removed according to the construction progress condition;
e: demolishing of reinforcing mesh at opening
When no longer needing the entrance to a cave protection, can bear reinforcing bar recycle, cut and bear the weight of the reinforcing bar and should go on cutting operation from high to low, excision from the reinforcing bar net piece lower part with the double ladder, can follow the face and excision when there is not vertical structure around the entrance to a cave face, the tangent plane uses rust protection paint to brush after the structure reinforcing bar cutting is accomplished can.
3. The floor horizontal portal safety protection construction method according to claim 2, wherein: and E, in the dismantling process of the reinforcing mesh at the opening of the hole, a fire receiving hopper is used for preventing fire from happening during cutting.
4. The floor level entrance to a cave safety protection construction method as claimed in claim 1, wherein: the arrangement space of the bearing steel bars is 200mm, and the bearing steel bars are arranged close to the edge of the hole by 100 mm.
5. The floor level entrance to a cave safety protection construction method as claimed in claim 1, wherein: when the beam-free components are arranged around the horizontal hole, the bearing steel bars are overlapped with the upper steel bars of the floor slab steel bars, and the overlapping length is lle; when shear walls or beam members are arranged around the horizontal hole, bearing steel bars around the hole extend to longitudinal ribs on the inner side of the support and then are bent for 15d, and when the lengths of the straight sections are respectively more than or equal to la and more than or equal to laE, the bearing steel bars can not be bent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311074662.9A CN116971634A (en) | 2023-08-24 | 2023-08-24 | Safety protection construction method for horizontal tunnel portal of floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311074662.9A CN116971634A (en) | 2023-08-24 | 2023-08-24 | Safety protection construction method for horizontal tunnel portal of floor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116971634A true CN116971634A (en) | 2023-10-31 |
Family
ID=88481555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311074662.9A Pending CN116971634A (en) | 2023-08-24 | 2023-08-24 | Safety protection construction method for horizontal tunnel portal of floor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116971634A (en) |
-
2023
- 2023-08-24 CN CN202311074662.9A patent/CN116971634A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tam et al. | Use of prefabrication to minimize construction waste-a case study approach | |
| CN106801517B (en) | External reinforcing and reinforcing method for school shed with prefabricated porous plate brick mixed structure | |
| Salgado et al. | Life cycle assessment of seismic retrofit alternatives for reinforced concrete frame buildings | |
| CN112982779A (en) | Construction method for floor construction by adopting detachable wood formwork steel bar truss floor support plate | |
| Masudi et al. | Construction waste quantification and benchmarking: A study in Klang Valley, Malaysia | |
| CN112627497A (en) | High-precision aluminum frame wood formwork building method | |
| CN107818223B (en) | Bearing capacity checking calculation and construction method for mounting lifter on underground garage roof | |
| CN110593477B (en) | Construction method of cast-in-situ reinforced concrete special-shaped inclined plate | |
| CN101694127B (en) | Formwork support system for steel frame structure cast-in-place concrete floorslabs | |
| CN217734839U (en) | Actual measurement result system construction template for improving main structure stage | |
| CN116971634A (en) | Safety protection construction method for horizontal tunnel portal of floor | |
| Kim et al. | Improved productivity using a modified table formwork system for high-rise building in Korea | |
| CN110700573A (en) | Construction method, device and application of formwork support system adopting steel beam | |
| CN203603461U (en) | Floor aluminum shuttering splicing formwork structure system | |
| CN214365094U (en) | Elevator well protector | |
| CN111236603A (en) | Comprehensive construction method for steel plate mesh overhanging scaffold | |
| CN104675138A (en) | Method and structure for reinforcing modified sound-insulation and noise-reduction slab balcony | |
| CN201826526U (en) | Device for supporting template of steel frame structure cast-in-situ concrete floor slab | |
| Yip et al. | Comparison of timber and metal formwork systems | |
| CN106869387A (en) | Multi-ribbed plate Structural Floor System HZ concrete film construction methods | |
| CN113202029A (en) | Construction method for protecting wet joint of bridge and bottom of cross diaphragm plate in upward crossing business line | |
| Toulabia et al. | Technical evaluation of integrated wall and roof formwork system and its comparison with ordinary concrete building construction method | |
| Philip et al. | Comparative study of conventional slab with slab constructed using AAC block and steel grid | |
| Xiao | The importance of formwork methods in the economical execution of concrete structures | |
| CN221219780U (en) | Building floor board horizontal hole steel bar protection net |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |