CN113585737A - Tool type formwork for one third of stair tread span - Google Patents

Tool type formwork for one third of stair tread span Download PDF

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Publication number
CN113585737A
CN113585737A CN202110795219.5A CN202110795219A CN113585737A CN 113585737 A CN113585737 A CN 113585737A CN 202110795219 A CN202110795219 A CN 202110795219A CN 113585737 A CN113585737 A CN 113585737A
Authority
CN
China
Prior art keywords
formwork
stair
steel pipe
low
ladder board
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
Application number
CN202110795219.5A
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Chinese (zh)
Inventor
王志勇
蔡建桢
刘强
赵忠华
刘青
路赞赞
侯宇
张盼盼
刘保雷
张建业
曾驰
闫萌萌
董健
樊建伟
庄希禾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd
Original Assignee
City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd filed Critical City Construction Development Co Ltd of China Railway 16th Bureau Group Co Ltd
Priority to CN202110795219.5A priority Critical patent/CN113585737A/en
Publication of CN113585737A publication Critical patent/CN113585737A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G13/00Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/06Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
    • E04G13/062Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for stairs or steps

Abstract

The invention discloses a tool type formwork for returning one third of the span of a stair board, which comprises two sets of parallel ladder board bottom formwork support systems, the bottoms of the two sets of ladder board low formwork support systems are connected with the upper end of a steel pipe support system, a ladder board low formwork keel is arranged between the two sets of ladder board low formwork support systems, each ladder board low formwork support system comprises a ladder board low formwork support, each ladder board low formwork support is connected with a first steel pipe upright post, the other end of each ladder board low formwork support is connected with a second steel pipe upright post, the first steel pipe upright post and the second steel pipe upright post are respectively connected with an adjusting screw rod, the upper end of each first steel pipe upright post is connected with the upper end of the corresponding second steel pipe upright post through angle steel, the two sets of angle steel are connected with the ladder board low formwork keels, the upper ends of the ladder board low formwork keels are provided with ladder board side formwork, the lower ends of the ladder board side formworks are connected with angle steel, the ladder board side formworks on two sides are connected with a step template through bolts, the top ends of the side forms of the two side ladders are connected with the end socket formwork of the construction joint. The invention has simple structure and convenient use, and greatly improves the working efficiency.

Description

Tool type formwork for one third of stair tread span
Technical Field
The invention relates to the technical field of construction of various civil buildings cast-in-place reinforced concrete slab stairways, in particular to a tool assembly type formwork for returning one third of span of a stair slab.
Background
In a conventional cast-in-place structure, when non-shear walls are arranged on wall bodies on two sides of a staircase, the staircase and floor concrete are poured synchronously, but the reserved position of a staircase construction joint is a great controversial issue all the time, in the prior art, a method for arranging the construction joint in the one-third step span is the most reasonable scheme from the structural stress angle and the process compliance, and is also a construction method widely pushed at present, but in the field actual operation process, the defects of different degrees exist due to the restriction of process conditions and the influence of human factors, and the concrete expression is as follows:
1. because the step slab of upper layer one third span is pour with this layer structure in step, the requirement to framework supporting quality and construction team operation standard is very high, at present stair template mounting method still uses the wooden formwork as the main part, the template system adopts the traditional technology of scattered branch and scattered tear-open, the ladder section template of going up and returning needs to be equipped with a large amount of supporting materials because unsettled the erection, and be difficult to reliably fix, easily because of factors such as rigidity is not enough, piece seam is not tight, leads to the race mould to leak thick liquid, influences structural quality and the impression effect after the component shaping.
2. The elevation and the position of the going-up and going-back ladder section are inconvenient to accurately control, particularly the elevation slope of the ladder plate, the bottom mould is easy to settle in the concrete pouring process, and the bottom mould is not matched with the slope of the poured ladder plate when the ladder plate is secondarily supported, so that slab staggering or slag inclusion occurs at a construction joint; if the scheme of integrally installing the bottom formwork of the ladder board is adopted, the ladder board can be ensured to be flat, but the formworks of the upper-layer rest platform must be erected in place together, the difficulty of formwork installation is increased, the field workload is large, the operation is extremely inconvenient, the construction period is long, the labor cost is high, the work efficiency is low, and the resource investment is increased.
3. If the bottom die of the upward returning ladder board sinks, the bottoms of successively constructed ladder boards are not on the same plane, the middle section of each ladder board is in an outward convex zigzag shape, the subsequent plastering and surface decoration construction of the ladder boards are directly influenced, and the repair measures of chiseling treatment cannot be taken because the thickness of each ladder board is thinner, so that only the reworking can be chiseled, and a large amount of economic loss is caused; if the bottom die of the going-up and returning ladder board floats upwards, the middle section of the ladder board is in the shape of a folding plate which is concave inwards, according to the national building standard design atlas (16G 101-1) folded plate reinforcement structure, the lower layer steel bars of the inner folded plate are cross anchored after being broken at the folding angle, the longitudinal stress bars of the ladder board are laid in a penetrating way, when the lower layer steel bars of the inner folded plate are pulled under the state of the folding line, the concrete can not be restrained to be freely stretched and deformed, the steel bars can not exert the tensile capacity, and the concrete can not resist the damage of the concrete just along with the deformation of the concrete before the lower layer steel bars become straight lines, thereby leading to the potential safety hazard of the structure.
4. The traditional wood formwork process lacks effective technical measures for the site construction of the up-going and back-going stair treads, is greatly influenced by process restriction and human factors, lacks a special mould for the stair up-going and back-going stair tread formwork project at present, has slow technical updating, causes the construction common fault of cast-in-place stair treads to exist for a long time, and cannot meet the requirements of high-quality development and standardized construction of the modern building industry.
Disclosure of Invention
In view of the above technical problems in the related art, the present invention provides a tool type formwork for returning one third of the span of the stair tread, which can overcome the above disadvantages in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the tool type formwork frame capable of returning one third of stair plate span is characterized by comprising two groups of parallel stair plate bottom formwork support systems, the bottoms of the two groups of stair plate low formwork support systems are connected with the upper end of a steel pipe support system, and a plurality of groups of stair plate low formwork keels are arranged between the two groups of stair plate low formwork support systems;
the ladder board low-formwork support system comprises a ladder board low-formwork support, wherein one end of the ladder board low-formwork support is connected with a first steel pipe upright post, the other end of the ladder board low-formwork support is connected with a second steel pipe support, the lower ends of the first steel pipe support and the second steel pipe support are respectively connected with an adjusting screw rod, the upper end of the first steel pipe support is connected with the upper end of the second steel pipe support through angle steel, and two groups of angles are connected with a plurality of groups of ladder board low-formwork keels;
the low mould fossil fragments of step board upper end is equipped with the low mould of step board, the low mould both ends of step board all are equipped with the step board side form, step board side form lower extreme is connected with the angle steel, both sides the step board side form and a plurality of group the template of marking time passes through bolted connection, both sides the bolt is passed through on step board side form top and construction joint head template connection.
Furthermore, the adjusting screw rod sleeve is provided with an adjusting nut.
Furthermore, the lower end of the adjusting screw rod is in threaded connection with the upper end of the steel tube support system.
Furthermore, the step low-profile is connected with the step low-profile keel through self-tapping screws.
Furthermore, the ladder board side die is connected with angle steel through bolts.
Furthermore, the ladder plate side die is connected with the angle steel through bolts.
The invention has the beneficial effects that: the utility model provides a tool type die carrier of one third stair tread span returns on, adopt steel-wood combination assembled mould, replace the laggard method of keeping somewhere the construction joint on rest platform board or ladder beam in the past, solve the technological defect that the stair tread that returns on the same side adopts traditional wood former, guarantee that cast-in-place structure construction joint sets up rationally and technology compliance, effectively prevent the easy safety of structural engineering, quality accident hidden danger, promote the construction precision and satisfy standard requirement, promote the whole quality of cast-in-place plate stair structural engineering, satisfy the needs of the high-quality development of building industry and standardized construction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a side view of a tooling formwork returning one third of a stair tread span according to an embodiment of the present invention.
Fig. 2 is a structure view of a lower formwork and a bottom plate side formwork of a tool type formwork returning one third of the span of the stair treads according to an embodiment of the invention.
Fig. 3 is a structural diagram of a step template and a construction joint end socket template of the tool type formwork returning one third of the span of the stair tread according to the embodiment of the invention.
Fig. 4 is a working structure diagram of a tool type formwork returning to one third of the span of the stair tread according to an embodiment of the invention.
Fig. 5 is a structural view of a step template of the tool type formwork returning one third of the span of the stair tread according to the embodiment of the invention.
Fig. 6 is a structural diagram of a construction joint end socket formwork of a tool type formwork returning one third of the span of a stair tread according to an embodiment of the invention.
In the figure: 1. angle steel, 2, step low mould, 3, step side mould, 4, the template of marking time, 5, construction joint head template, 6, steel pipe support system, 7, step low mould fossil fragments, 8, step low mould support, 9, adjust the lead screw, 10, adjusting nut, 11, first steel pipe pillar, 12, second steel pipe pillar, 13, self-tapping screw, 14, bolt, 15, stair roof beam, 16, the vertical atress muscle of step, 17, rest platform.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
As shown in fig. 1 to 6, the tool type formwork with one third upward step span according to the embodiment of the present invention includes two sets of parallel step bottom formwork support systems, bottoms of the two sets of step low formwork support systems are both connected with upper ends of steel pipe support systems 6, and a plurality of sets of step low formwork keels 7 are arranged between the two sets of step low formwork support systems;
the step low-formwork support system comprises a step low-formwork support 8, one end of the step low-formwork support 8 is connected with a first steel pipe upright post 11, the other end of the step low-formwork support 8 is connected with a second steel pipe strut 12, the lower ends of the first steel pipe strut 11 and the second steel pipe strut 12 are respectively connected with an adjusting screw 9, the upper end of the first steel pipe strut 11 is connected with the upper end of the second steel pipe strut 12 through angle steel 1, and two groups of angle steel 1 are connected with a plurality of groups of step low-formwork keels 7;
7 upper ends of the step low-formwork keel are provided with step low formworks 2, 2 two ends of the step low formwork are provided with step side forms 3, 3 lower ends of the step side forms are connected with angle steel 1, two sides of the step side forms 3 are provided with a plurality of groups, the step templates 4 are connected through bolts, two sides of the step side forms 3 are connected with the construction joint end plate templates 5 through bolts.
In the specific embodiment, the adjusting screw 9 is sleeved with an adjusting nut 10.
In a specific embodiment, the lower end of the adjusting screw 9 is in threaded connection with the upper end of the steel tube bracket system 6.
In the specific embodiment, the step low formwork 2 is connected with the step low formwork keel 7 through self-tapping screws 13.
In the specific embodiment, the stair case sideforms 3 are connected with the angle iron 1 through bolts 14.
In a particular embodiment, several sets of said ladder plank low-profile runners 7 are parallel to each other.
In order to facilitate understanding of the above-described technical aspects of the present invention, the above-described technical aspects of the present invention will be described in detail below in terms of specific usage.
When the tool type formwork returning upwards for one third of the stair plate span is used in actual construction on site, firstly, a structural drawing is taken as a basis, the positions and elevations of a rest platform 17, a stair beam 15 and the tool type formwork returning upwards for one third of the stair plate span are accurately discharged on the basis of a floor +0.500 line and a plane axis, a steel pipe support frame system 6 is erected on a lower floor, the rest platform 17, the stair beam 15 and the tool type formwork returning upwards for one third of the stair plate span are installed according to a conventional method, and after the installation and reinforcement of the side mould of the lower end stair beam 15 corresponding to the tool type formwork returning upwards for one third of the stair plate span are completed, the elevation, the size and the position deviation are checked, and the bottom formwork support 8 of the stair plate is installed without errors. The elevation and the position of the lower steel pipe supporting system 6 are adjusted according to the designed structure size to correspond to the first steel pipe upright post 11 and the second steel pipe upright post 12, the tower crane is used for integrally hoisting the bottom formwork support 8 of the ladder plate, the adjusting screw rods 9 are respectively inserted into the first steel pipe upright post 11 and the second steel pipe upright post 12, the elevation is preliminarily adjusted by the adjusting screw caps 10, the elevation gradient of the ladder plate meets the design requirement, and then the ladder plate is locked and fixed. Then laying a stair board bottom die 2, wherein the stair board bottom die 2 adopts a wood-rubber template with the thickness of 15mm, the width of the wood-rubber template is 25mm wider than each side of a stair board, the stair board bottom die 2 and a stair board low-die keel 7 are anchored by self-tapping screws 13, the anchor space is 200mm, the splicing part of the stair board bottom die 2 and a stair beam 15 side die is planed into a bevel edge to ensure that the corners are neat and are firmly nailed by iron nails, then the stair board side die 3 is installed, the stair board side die 3 is pressed against the stair board bottom die 2 by adopting the stair board side die 3, threaded holes on the stair board side die 3 correspond to bolt holes reserved on angle steel 1 one by one, the installation of the stair board side die 3 is completed by bolts 14, a rest platform 17 and a stair beam 16 are bound according to the design and specification requirements of a drawing, the lower end of a stair board longitudinal stress rib 15 extends into the stair beam 16 to be anchored according to the specification requirements, the upper end extends to the upper layer of the stair beam 15 and is placed on a support which is erected, and the upper edge of the temporary wood strip with the same thickness is designed as a steel bar protection layer, and then installing a step template 4 and a construction joint end enclosure template 5, erecting the step template 4 on the stair template side mold 3, and connecting and fixing the two ends of the step template 4 and the bolt holes reserved on the angle steel 1 by using bolts in a one-to-one correspondence manner. Installing a construction joint end socket template 5 according to the same method, reserving a notch at the bottom of the construction joint end socket template 5 when the construction joint end socket template 5 is manufactured, placing a longitudinal stress rib 16 of a ladder plate, slotting according to the interval of the longitudinal stress rib 16 of the ladder plate, wherein the slot width is 1.5 times of the diameter of the longitudinal stress rib 16 of the ladder plate, enabling the longitudinal stress rib 16 of the ladder plate to pass through the slot hole and be blocked by a polyurethane foaming agent to prevent slurry leakage during concrete pouring, rechecking the position and elevation of a bottom mould 2 of the ladder plate after the tool type mould frame which returns one third of the span of the ladder plate is installed, checking the elevation of the upper end and the lower end of a bottom mould support 8 of the ladder plate by a level gauge, ensuring that the elevation gradient of the low mould of the ladder plate is matched with a design drawing by finely adjusting a screw 9 on the bottom mould support 8 of the ladder plate, detecting the size of each position and whether the mould frame is reinforced firmly by a steel ruler, ensuring the stability and reliability of the whole mould frame system, pouring concrete after the stair installation quality is received by report and inspection, and vibrating and leveling are carried out synchronously, the pouring sequence is that the stair beam 15 is poured firstly, then the rest platform 17 is poured, and finally the stair section of the upward returning part is poured. The concrete of the ladder section is poured from bottom to top, the concrete of the ladder plate is compacted firstly and poured together with the concrete of the step when reaching the position of the template 4 of the step, the concrete is pushed upwards continuously, the upper surface of the step is trowelled by a wooden trowel or a plastic trowel at any time, the top surface of the template 4 of the step is used as the basis for accurately leveling the step when the step is trowelled, when the secondary connection of the upper-layer ladder is poured, the cement laitance and the weak layer on the surface of the construction joint are removed by a flat shovel until the stone is exposed, and the stone is washed cleanly. Derusting the longitudinal bars of the ladder board, adjusting the spacing and binding the longitudinal bars in place. When the stubble concrete is poured, a layer of cement mortar with the thickness of 50mm and the same mixing ratio as the concrete is paved at a construction joint, the concrete at the construction joint is tamped finely, new and old concrete is combined closely, the concrete is covered and maintained for 12h after pouring, the concrete curing time is not less than 14d, a tool type formwork which returns one third of the stair board span upwards is removed after the stair concrete reaches the specified strength, the step formwork 4 and the construction joint end socket formwork 5 are firstly removed, the stair board side formwork 3 is removed, the stair board bottom formwork support 8 falls down and drives the stair board bottom formwork 2 to be separated from the stair board concrete, and the whole hoisting and transferring of a tower crane are utilized. And collecting and cleaning each detached part in time, cleaning mortar, coating a release agent, and placing the mortar in a dry place for storage for continuous turnover.
In conclusion, by means of the technical scheme, the steel-wood combined assembly type mould is adopted to replace the conventional backward method for keeping the construction joint on the rest platform plate or the ladder beam, the process defect that the traditional wood mould is adopted for the going-up and going-back ladder plate is overcome, the reasonable arrangement and process compliance of the construction joint of the cast-in-place structure are ensured, the potential safety and quality accident hazards easily caused by the structural engineering are effectively prevented, the construction precision is promoted to meet the standard requirement, the overall quality of the cast-in-place plate type stair structural engineering is improved, and the requirements of high-quality development and standardized construction of the building industry are met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. The tool type formwork frame capable of returning one third of stair plate span is characterized by comprising two groups of parallel stair plate bottom formwork support systems, the bottoms of the two groups of stair plate low formwork support systems are connected with the upper end of a steel pipe support system (6), and a plurality of groups of stair plate low formwork keels (7) are arranged between the two groups of stair plate low formwork support systems;
the step low-formwork support system comprises a step low-formwork support (8), wherein one end of the step low-formwork support (8) is connected with a first steel pipe upright post (11), the other end of the step low-formwork support (8) is connected with a second steel pipe support post (12), the lower ends of the first steel pipe support post (11) and the second steel pipe support post (12) are respectively connected with an adjusting screw rod (9), the upper end of the first steel pipe support post (11) is connected with the upper end of the second steel pipe support post (12) through angle steel (1), and two groups of angle steel (1) are connected with a plurality of groups of step low-formwork keels (7);
the ladder board low mould fossil fragments (7) upper end is equipped with ladder board low mould (2), ladder board low mould (2) both ends all are equipped with ladder board side form (3), ladder board side form (3) lower extreme is connected with angle steel (1), both sides ladder board side form (3) and a plurality of group template (4) of marking time pass through bolted connection, both sides bolt and construction joint head template (5) are connected are passed through on ladder board side form (3) top.
2. A tool type formwork frame for one third of the span of the stair step according to claim 1, wherein said adjusting screw (9) is sleeved with an adjusting nut (10).
3. A tool type formwork frame for one third of the span of the stair step plate upwards according to claim 1, wherein the lower end of the adjusting screw rod (9) is in threaded connection with the upper end of the steel pipe bracket system (6).
4. A tool formwork returning one third of the stair tread span according to claim 1, wherein the stair tread low formwork (2) is connected with the stair tread low formwork keel (7) through self-tapping screws (13).
5. A tool formwork back one third of a stair plate span according to claim 1, wherein the stair plate side forms (3) are connected with the angle iron (1) through bolts (14).
6. A tool formwork back one third of a stair plate span according to claim 1, wherein several sets of said stair plate low profile runners (7) are parallel to each other.
CN202110795219.5A 2021-07-14 2021-07-14 Tool type formwork for one third of stair tread span Pending CN113585737A (en)

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CN202110795219.5A CN113585737A (en) 2021-07-14 2021-07-14 Tool type formwork for one third of stair tread span

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Application Number Priority Date Filing Date Title
CN202110795219.5A CN113585737A (en) 2021-07-14 2021-07-14 Tool type formwork for one third of stair tread span

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590550A (en) * 2013-11-04 2014-02-19 深圳市建工集团股份有限公司 Three-step-upward construction method for stairs
JP2015196982A (en) * 2014-04-01 2015-11-09 株式会社安藤・間 Concrete construction joint forming method
CN205637582U (en) * 2016-05-27 2016-10-12 青岛建安建设集团有限公司 Stair swash plate construction joint template structure
CN106193595A (en) * 2016-08-30 2016-12-07 平煤神马建工集团有限公司 One can take out strip type stair formwork erecting method
CN208396295U (en) * 2018-07-04 2019-01-18 北京市政建设集团有限责任公司 A kind of open-cut station construction stair formwork erecting structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103590550A (en) * 2013-11-04 2014-02-19 深圳市建工集团股份有限公司 Three-step-upward construction method for stairs
JP2015196982A (en) * 2014-04-01 2015-11-09 株式会社安藤・間 Concrete construction joint forming method
CN205637582U (en) * 2016-05-27 2016-10-12 青岛建安建设集团有限公司 Stair swash plate construction joint template structure
CN106193595A (en) * 2016-08-30 2016-12-07 平煤神马建工集团有限公司 One can take out strip type stair formwork erecting method
CN208396295U (en) * 2018-07-04 2019-01-18 北京市政建设集团有限责任公司 A kind of open-cut station construction stair formwork erecting structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
龙期亮: "楼梯梯段施工缝工具式封模施工技术", 《广东建材》, no. 2, 15 February 2020 (2020-02-15), pages 1 - 2 *

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