CN114658219A - Single-side assembly type formwork erecting construction method - Google Patents
Single-side assembly type formwork erecting construction method Download PDFInfo
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- CN114658219A CN114658219A CN202210403756.5A CN202210403756A CN114658219A CN 114658219 A CN114658219 A CN 114658219A CN 202210403756 A CN202210403756 A CN 202210403756A CN 114658219 A CN114658219 A CN 114658219A
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- pouring
- connecting seat
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- 238000009415 formwork Methods 0.000 title claims abstract description 61
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 21
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 238000012423 maintenance Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000003825 pressing Methods 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 9
- 239000011398 Portland cement Substances 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 11
- 239000012634 fragment Substances 0.000 description 8
- 239000004744 fabric Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 239000012774 insulation material Substances 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 235000010554 Coreopsis tinctoria var. tinctoria Nutrition 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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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
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/08—Forms, which are completely dismantled after setting of the concrete and re-built for next pouring
-
- 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
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- 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)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
A unilateral assembly type formwork erection construction method is characterized in that a part of embedded parts are pre-installed on the ground, an insulation board is arranged on an original wall surface, and a wallboard reinforcement is bound on one side, far away from the insulation board, of the original wall surface to form a reinforcement framework; after the reinforcement cage is bound, side templates are arranged on two sides of the original wall surface; assembling the formwork supporting structure, so that the formwork supporting structure, the original wall surface and the side formworks surround the steel bar framework to form a pouring space; pouring concrete in the pouring space to form an outer wall body; after the concrete is condensed, removing the formwork supporting structure; and (5) performing watering maintenance on the poured concrete. Aiming at the restraint of the existing building structure, the invention combines and utilizes the design and connection method of the fabricated building to form a stable triangular system, so that the template has tight joint and enough rigidity, strength and stability, the structure position and the size of the concrete member after pouring and forming are accurate and the side template is not required to be removed, and the construction cost is saved.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a construction method for erecting a single-side assembled template.
Background
With the continuous progress of urbanization, newly increased available land resources in built areas of city centers are nearly exhausted, and development and utilization of built areas with many corner areas and great care are very important. In the development and utilization of corner areas, due to the limitation of site construction sites, the limitation of the use of large construction machines such as tower cranes, cranes and the like, the difficulty in transferring and using heavy components, the restriction of existing building structures, and the need of building construction close to the established building structures. According to a common method, templates on two sides are directly erected firstly, then concrete is poured for vibration, and the templates are dismantled. Therefore, the technical problem to be solved by the technical personnel in the field is urgent to provide an external wall single-side formwork support system which is convenient to support, low in cost and easy to construct and support the constructed structure in a manner of clinging to the constructed structure.
Disclosure of Invention
In view of the above, a need exists for a method for erecting a single-side assembled form.
A construction method for erecting a single-side assembled formwork includes such steps as installing a formwork on a formwork supporting frame,
and (3) mounting the embedded part: positioning and paying off according to the requirements of a drawing when an upper roof is cast in place, arranging the positions of the embedded parts, and pouring concrete in a normal construction sequence after the embedded parts are arranged;
laying an insulation board on an original wall surface: cleaning the bottom openings of each layer of the heat insulation boards, arranging the heat insulation boards in a staggered manner, wherein the staggered joint length of a large-area wall surface is 1/2-1/3 of the length of the heat insulation boards, and erecting the heat insulation boards in the concave and convex corners to arrange in a staggered manner without the phenomenon of through joint;
binding a steel bar framework: binding wall plate reinforcing steel bars on one side of the original wall surface, which is far away from the heat insulation plate, so as to form a reinforcing steel bar framework;
installing a side template: after the reinforcement cage is bound, side templates are arranged on two sides of the original wall surface;
the mounting template supports and establishes the structure: assembling the formwork supporting structure, so that the formwork supporting structure, the original wall surface and the side formworks surround the steel bar framework to form a pouring space;
pouring concrete: pouring concrete in the pouring space to form an outer wall body;
the template supporting structure is dismantled: the dismantling is carried out according to a planned dismantling program, the dismantling is carried out firstly after the later dismantling, and the dismantling is carried out after the first dismantling; firstly, removing the non-bearing part and then removing the bearing part;
concrete curing: and (3) performing watering maintenance on the poured concrete, wherein the watering frequency of the concrete can keep the concrete in a wet state, the maintenance water of the concrete is the same as the mixing water, and watering is not required when the daily average temperature is lower than 5 ℃.
Preferably, among the ligature framework of steel reinforcement step, reinforcement joint overlap joint length should accord with the designing requirement, should adopt the electric welding reinforcement when can not satisfying, and the joint position will stagger, and two rows of reinforcements of outermost should full ligature, but other positions quincunx ligature.
Preferably, in the step of installing the side formwork, the two ends of the through long rib are welded with the water stop screws, the two-way opposite-pull wall penetrating screws are adopted, in order to reinforce the outer side shear wall formwork, the formwork is fixed by 750mm screws and the gable card every 450mm back of the batten, in order to ensure the cross section size of the shear wall, the formwork on the two sides is supported by the L200 x phi 16 steel bar, the cross section size is ensured to be 200mm +/-4 mm, and the formwork in the expansion joint is not taken out after construction.
Preferably, in the concrete pouring step, the concrete is poured in layers, the pouring height of each layer is not more than 0.5 m, the upper layer of concrete is poured before the initial setting of the lower layer of concrete, and the pouring speed of the concrete is controlled within 1 m/h.
Preferably, in the concrete curing step, the natural curing of the poured concrete is started before the final setting of the concrete, and the concrete mixed by portland cement, ordinary portland cement and the like is adopted within the watering curing time of the concrete, so that the time is not less than 7 days.
Preferably, in the concrete curing step, after the concrete is poured and reaches a certain strength, the templates on the two sides are loosened in time, the distance from the joint is about 3-5 mm, a water spraying pipe is erected at the top of the wall body for spraying and curing, curing agents are sprayed on the vertical surfaces on the two sides of the wall after the templates are removed, the wall surface is prevented from being directly irradiated by sunlight, and continuous spraying and curing are performed.
Preferably, the formwork supporting structure comprises diagonal braces, a first embedded part, a second embedded part, a wall formwork and vertical ribs, the wall formwork is vertically arranged, an inner keel is arranged on the surface of one side of the wall formwork, which is far away from a wall body, the inner keel is longitudinally arranged and is equidistantly distributed along the horizontal direction of the wall formwork, a supporting table is arranged on one side of the inner keel, which is far away from the wall formwork, the supporting table is equidistantly distributed along the longitudinal direction of the inner keel, an outer keel is horizontally arranged on the supporting table, the first embedded part is arranged on the ground and is positioned on one side close to the wall formwork, the second embedded part is arranged on the ground and is positioned on one side far away from the wall formwork, the vertical ribs are longitudinally arranged and are tightly attached to the outer keel, the lower ends of the vertical ribs are connected with the first embedded part, the upper ends of the diagonal braces are hinged with the upper parts of the vertical ribs, and the lower ends of the diagonal braces are hinged with the second embedded part, the diagonal brace, the vertical ridges and the ground form a right-angled triangle structure, and the length of the diagonal brace is adjustable.
Preferably, the first embedded part comprises a first embedded bolt and a first connecting assembly, the first embedded bolt is embedded in the ground, the first connecting assembly is installed on the first embedded bolt and used for connecting the lower end of the vertical rib, the first connecting assembly comprises a connecting seat and a pressing mechanism, the connecting seat is installed on the first embedded bolt, the connecting seat is hollow and open at the top, sliding grooves are oppositely formed in two sides of the connecting seat, a first pin rod is arranged in the connecting seat and connected with the lower end of the vertical rib along the sliding grooves and the sliding grooves in a sliding mode, the pressing mechanism is installed on the connecting seat, one end of the pressing mechanism extends into the connecting seat and is in contact with the lower portion of the vertical rib, the pressing mechanism is adjusted to enable the pressing mechanism to support the vertical rib to slide towards one side of the wall formwork so as to enable the vertical rib to be tightly attached to the outer keel, and the pressing mechanism comprises a pressing plate, The pressing plate is positioned in the connecting seat, the connecting screw penetrates through the connecting seat and is fixed with the pressing plate in the connecting seat, and the adjusting nut is positioned outside the connecting seat and sleeved on the connecting screw and used for fixing the connecting screw and the connecting seat, so that the lower part of the vertical edge is propped against by the pressing plate, and the vertical edge is tightly attached to the outer keel.
Preferably, the second embedded part comprises second embedded bolts and connecting grooves, the second embedded bolts are embedded in the ground, the connecting grooves are installed on the second embedded bolts and are used for being connected with the lower ends of the inclined struts, positioning holes are symmetrically arranged on two sides of the connecting grooves, second pin rods are arranged in the connecting grooves and penetrate through the lower ends of the inclined struts and the positioning holes in the connecting grooves, the lower ends of the inclined struts are connected with the connecting grooves, and the positioning holes are evenly distributed along two sides of the connecting grooves at equal intervals.
Preferably, a base plate is arranged below the connecting groove and the connecting seat.
According to the technical scheme, the single-side fabricated formwork erecting construction method provided by the invention aims at the restriction of the existing building structure, needs to carry out a concrete structure which can not be erected on one side beside the built structure, and combines and utilizes the design and connection method of the fabricated building. The connecting nodes are pre-buried when the upper layer of pouring structure is formed, and the standardized and customized supporting structure members and templates prefabricated in factories are adopted to form a stable triangular system, so that the templates are tightly jointed and have enough rigidity, strength and stability, and finally, the structure position and the size of the concrete member after pouring forming are accurate, and the concrete member is suitable for being constructed by using corner places and sandwich places and can only be used for a concrete structure with a formwork supported at one side. By adopting the construction method, under the conditions that the site construction sites such as a triangular ground and a sandwich ground are not sufficient, various large-scale machines cannot enter the construction site, the places are limited, and heavy components are difficult to transport, the construction quality of the wall body is ensured, meanwhile, the construction period of the wall body can be shortened by nearly one fourth, and the difficulty of construction of a single-side template of the wall body is overcome. For house buyers, the construction quality of the building engineering is ensured, and the housing of common people is more secure and peaceful. In addition, the construction method can also generate better economic benefit and social benefit by saving energy, reducing consumption, saving energy and reducing emission.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced 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 that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the present invention.
Fig. 2 is a partially enlarged view of a portion a in fig. 1.
Fig. 3 is a partially enlarged view of B in fig. 1.
Fig. 4 is a schematic structural diagram of another embodiment of the present invention.
Fig. 5 is a partially enlarged view of C in fig. 4.
In the figure: the inclined strut 01, the first embedded part 02, the first embedded bolt 21, the first connecting assembly 22, the connecting base 221, the pressing mechanism 222, the pressing plate 2221, the connecting screw 2222, the adjusting nut 2223, the sliding groove 223, the first pin 224, the second embedded part 03, the second embedded bolt 31, the connecting groove 32, the positioning hole 321, the second pin 322, the wall form 04, the vertical ridge 05, the inner keel 06, the supporting table 61, the outer keel 07, the wood block 08, the backing plate 09, the wall 10 and the groove 20.
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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", "lower", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Take 36# residential building in golden wave district as an example, the template props up and establishes the structure and adopts dedicated structure, wherein, the template props up and establishes the structure and includes diagonal brace 01, first pre-buried part 02, the pre-buried part 03 of second, wall form 04, erect stupefied 05, the vertical setting of wall form 04, wall form 04 keeps away from a side surface of wall body 10 and is provided with interior fossil fragments 06, interior fossil fragments 06 vertically sets up, interior fossil fragments 06 distributes along the horizontal direction equidistance of wall form 04, thereby guarantee that the atress of wall form 04 is balanced, one side that wall form 04 was kept away from to interior fossil fragments 06 is provided with brace table 61, brace table 61 distributes along the longitudinal direction equidistance of interior fossil fragments 06, the level is provided with outer fossil fragments 07 on brace table 61, in order to guarantee the balanced atress of wall form 04 whole. First pre-buried part 02 sets up subaerial, first pre-buried part 02 is located the one side that is close to wall form 04, the pre-buried part 03 of second sets up subaerial, the pre-buried part 03 of second is located the one side of keeping away from wall form 04, erect stupefied 05 and vertically set up, and hug closely outer fossil fragments 07, erect stupefied 05's lower extreme and be connected with first pre-buried part 02, the upper end of diagonal brace 01 is articulated with the upper portion of erecting stupefied 05, the lower extreme of diagonal brace 01 is articulated with the pre-buried part 03 of second, make diagonal brace 01, erect stupefied 05 and ground and form the right angled triangle structure, thereby form the support to wall form 04, make the cavity that forms the pourable concrete between wall form 04 and the wall body 10. The length of the diagonal strut 01 is adjustable.
Referring to fig. 2, the first embedded part 02 includes a first embedded bolt 21 and a first connecting assembly 22, the first embedded bolt 21 is embedded in the ground, the first connecting assembly 22 is installed on the first embedded bolt 21, and the first connecting assembly 22 is connected to the lower end of the vertical rib 05.
First connecting element 22 includes connecting seat 221, hold-down mechanism 222, connecting seat 221 is installed on first buried bolt 21 in advance, the inside cavity of connecting seat 221, and the top is opened, both sides subtend at connecting seat 221 is provided with spout 223, be provided with first pin 224 in connecting seat 221, first pin 224 is along spout 223 and the lower extreme of erecting stupefied 05, first pin 224 and spout 223 sliding connection, hold-down mechanism 222 installs on connecting seat 221, the one end of hold-down mechanism 222 extends to in the connecting seat 221, contact with the lower part of erecting stupefied 05, adjustment hold-down mechanism 222, can make hold-down mechanism 222 withstand to erect stupefied 05 and slide to wall form 04 one side, make erect stupefied 05 hug closely outer fossil fragments 07.
The pressing mechanism 222 includes a pressing plate 2221, a connecting screw 2222, and an adjusting nut 2223, the pressing plate 2221 is located in the connecting base 221, the connecting screw 2222 penetrates through the connecting base 221 and is fixed to the pressing plate 2221 in the connecting base 221, the adjusting nut 2223 is located outside the connecting base 221 and is sleeved on the connecting screw 2222 to fix the connecting screw 2222 and the connecting base 221, so that the pressing plate 2221 abuts against the lower portion of the vertical ridge 05, and the vertical ridge 05 is tightly attached to the outer keel 07.
Referring to fig. 4 and 5, the pressing mechanism 222 may further adopt a wood block 08, and the wood block 08 is inserted into the connecting seat 221 to support the lower portion of the vertical ridge 05, so that the vertical ridge 05 is tightly attached to the outer keel 07.
Referring to fig. 3, the second embedded part 03 includes second embedded bolts 31 and connecting slots 32, the second embedded bolts 31 are embedded in the ground, the connecting slots 32 are installed on the second embedded bolts 31, and the connecting slots 32 are connected to the lower ends of the diagonal braces 01.
Positioning holes 321 are symmetrically arranged on two sides of the connecting groove 32, a second pin 322 is arranged in the connecting groove 32, the second pin 322 penetrates through the lower end of the diagonal brace 01 and the positioning holes 321 on the connecting groove 32, and the lower end of the diagonal brace 01 is connected with the connecting groove 32. Locating hole 321 is along the equidistance equipartition in the both sides of connecting groove 32, and the accessible inserts second pin pole 322 in different locating hole 321, realizes adjusting the contained angle of diagonal brace 01 and ground to guarantee the support dynamics.
The base plate 09 is arranged below the connecting groove 32 and the connecting seat 221, and the base plate 09 is made of a wood board, so that the connecting groove 32 and the connecting seat 221 can be sufficiently fixed on the ground when being fastened. In order to ensure that the connecting groove 32, the connecting seat 221 and the backing plate 09 can better form a positioning effect, the bottom of the connecting groove 32 and the bottom of the connecting seat 221 are both provided with a U-shaped groove 20, and the backing plate 09 can be clamped by the groove 20.
A construction method for erecting a single-side assembled formwork is carried out in the following way,
and (3) partially installing embedded parts: when an upper roof is cast in place, positioning and paying off are carried out according to the requirements of a drawing, the first embedded bolts 21 and the second embedded bolts 31 are arranged, and after the first embedded bolts 21 and the second embedded bolts 31 are arranged, the normal construction sequence is carried out, and concrete is poured; the size of the embedded bolt is phi 16 multiplied by 200mm, the specific size is determined according to actual conditions, the first embedded bolt 21 and the second embedded bolt 31 adopt protective measures to threads before embedding, and are wrapped and firmly bound by plastic cloth so as to prevent concrete from adhering to the screw fastener to influence the connection of nuts in later period during construction. Because the first embedded bolt 21 and the second embedded bolt 31 cannot be directly spot-welded with the main structural bar, in order to ensure that the embedded part does not run or shift during concrete pouring, the embedded part is required to be bound on the structural bar of the existing plate or additional steel bars are required to be added at corresponding positions so that the first embedded bolt 21 and the second embedded bolt 31 are spot-welded on the additional steel bars. If spot welding is required, care should be taken not to damage the effective diameter of the insert.
Laying a heat insulation plate on an original wall surface: cleaning the bottom openings of each layer of the heat insulation boards, arranging the heat insulation boards in a staggered manner, wherein the staggered joint length of a large-area wall surface is 1/2-1/3 of the length of the heat insulation boards, and erecting the heat insulation boards in the concave and convex corners to arrange in a staggered manner without the phenomenon of through joint; for the heat insulation material, strict regulations are required, the size, volume weight and the like of the heat insulation plate need to meet design requirements, effective measures are taken, the heat insulation material is prevented from being affected with damp, and the heat insulation material is kept in a dry state.
Binding a steel bar framework: binding wall plate reinforcing steel bars on one side of the original wall surface, which is far away from the heat insulation plate, so as to form a reinforcing steel bar framework; firstly, aligning and uniformly mixing the dowel bars of the bottom plate, and cleaning cement mortar on the dowel bars; erecting a support for supporting steel bars by using steel pipes, wherein the elevation of an upper transverse pipe of each steel pipe is controlled at the elevation of an upper opening of a longitudinal steel bar of the wall body; the height of the upper opening of the steel bar is controlled to be well bound, so that different heights are prevented; the lapping length of the steel bar joint is required to meet the specification or design requirement, and electric welding reinforcement is adopted when the lapping length of the steel bar joint cannot meet the requirement; the joint positions need to be staggered, and particularly the joint positions of the horizontal steel bars at the corner positions need to be considered comprehensively. The number of joint extrusion channels of the cold extrusion joint meets the specification requirement. In order to save the construction time, one half can be extruded in advance, and the other half can be pressed and connected after the construction is finished. The two rows of steel bars at the outermost part are bound in a full number, and other parts can be bound in a quincunx manner, so that all binding wires are pressed into a wall body to prevent a water seepage channel. And a cement mortar cushion block is adopted, and a specially-assigned person is responsible for placing the concrete, so that the steel bar protective layer meets the requirements. During the binding process of the steel bars, the positions of the steel bars are required to be paid attention to ensure that the cross section of the member is correct in size and a sufficient protective layer is required.
Installing a side template: after the reinforcement cage is bound, side templates are arranged on two sides of the original wall surface; utilize logical long muscle both ends welding stagnant water screw rod, adopt two-way opposite-pull wall screw rod, for consolidating outside shear wall template, the back of the body 40X 70mm flitch of shear wall every 450mm uses 750mm screw rod and chevron card fixed templates, for guaranteeing shear wall cross-sectional dimension, uses L200X 16 reinforcing bar shore both sides template, guarantees that cross-sectional dimension is 200mm 4mm, and the expansion joint inner formword no longer takes out after the construction is accomplished.
The installation template supports and establishes the structure: assembling the formwork supporting structures to enable the wall formwork 04, the original wall surface and the side formwork to surround the steel bar framework to form a pouring space;
pouring concrete: pouring concrete in the pouring space to form an outer wall body; the concrete pouring is carried out in layers, the pouring height of each layer is not more than 0.5 m, the upper layer of concrete is poured before the initial setting of the lower layer of concrete, and the pouring speed of the concrete is controlled within 1 m/h. The concrete pouring adopts tower crane, lifting bucket and string barrel pouring, and the pouring height limit values are detailed in the following table:
| conditions of | Pouring height limit (m) |
| The particle size of the coarse aggregate is more than 25mm | ≤3 |
| The particle diameter of the coarse aggregate is less than or equal to25mm | ≤6 |
The template supporting structure is dismantled: the dismantling is carried out according to a planned dismantling program, the dismantling is carried out firstly after the later dismantling, and the dismantling is carried out after the first dismantling; firstly, removing the non-bearing part and then removing the bearing part;
concrete curing: and (3) performing watering maintenance on the poured concrete, wherein the watering frequency of the concrete can keep the concrete in a wet state, the maintenance water of the concrete is the same as the mixing water, and watering is not required when the daily average temperature is lower than 5 ℃. The concrete after being poured is naturally cured before the concrete is finally set, and the concrete mixed by Portland cement, common Portland cement and the like is adopted within the watering curing time of the concrete, so that the curing time is not less than 7 days. After concrete pouring is finished and certain strength is achieved, the templates on the two sides are loosened in time, the distance from the seam is about 3-5 mm, a water spraying pipe is erected at the top of the wall body for spraying maintenance, after the templates are removed, a maintenance agent is sprayed on vertical surfaces on the two sides of the wall, the wall surface is prevented from being directly irradiated by sunlight, and continuous spraying maintenance is carried out. When the plastic film cloth is used for covering, wrapping and maintaining, the outer surface of the plastic film cloth is completely covered and tightly wrapped, and condensed water in the plastic cloth is ensured.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A construction method for erecting a single-side assembled formwork is characterized by comprising the following steps: the method comprises the steps of (1) carrying out,
and (3) mounting the embedded part: positioning and paying off according to the requirements of a drawing when an upper roof is cast in place, arranging the positions of the embedded parts, and pouring concrete in a normal construction sequence after the embedded parts are arranged;
laying an insulation board on an original wall surface: cleaning the bottom openings of each layer of the heat insulation boards, arranging the heat insulation boards in a staggered manner, wherein the staggered joint length of a large-area wall surface is 1/2-1/3 of the length of the heat insulation boards, and erecting the heat insulation boards in the concave and convex corners to arrange in a staggered manner without the phenomenon of through joint;
binding a steel bar framework: binding wall plate reinforcing steel bars on one side of the original wall surface, which is far away from the heat insulation plate, so as to form a reinforcing steel bar framework;
installing a side template: after the reinforcement cage is bound, side templates are arranged on two sides of the original wall surface;
the mounting template supports and establishes the structure: assembling the formwork supporting structure, so that the formwork supporting structure, the original wall surface and the side formworks surround the steel bar framework to form a pouring space;
pouring concrete: pouring concrete in the pouring space to form an outer wall body;
the template supporting structure is dismantled: the dismantling is carried out according to a planned dismantling program, the dismantling is carried out firstly after the later dismantling, and the dismantling is carried out after the first dismantling; firstly, removing the non-bearing part and then removing the bearing part;
concrete curing: and (3) performing watering maintenance on the poured concrete, wherein the watering frequency of the concrete can keep the concrete in a wet state, the maintenance water of the concrete is the same as the mixing water, and watering is not required when the daily average temperature is lower than 5 ℃.
2. The one-side fabricated formwork erection construction method according to claim 1, characterized in that: in the step of binding the steel bar framework, the lap joint length of the steel bar joints should meet the design requirements, electric welding reinforcement should be adopted when the requirement cannot be met, the joint positions should be staggered, the two rows of steel bars at the outermost should be bound by the whole number, and other positions can be bound by the quincunx.
3. The one-side fabricated formwork erection construction method according to claim 1, characterized in that: in the step of installing the side formwork, water stop screws are welded at two ends of a through long rib, two-way opposite-pulling wall penetrating screws are adopted, in order to reinforce an outer side shear wall formwork, the formwork is fixed by 750mm screws and a chevron-shaped clamp at intervals of 450mm, in order to ensure the cross section size of the shear wall, the formwork on two sides is supported by using L200 x phi 16 steel bars, the cross section size is ensured to be 200mm +/-4 mm, and the inner formwork of the expansion joint is not taken out after construction is completed.
4. The one-side fabricated formwork erection construction method according to claim 1, characterized in that: in the concrete pouring step, the concrete is poured in layers, the pouring height of each layer is not more than 0.5 m, the upper layer of concrete is poured before the initial setting of the lower layer of concrete, and the pouring speed of the concrete is controlled within 1 m/h.
5. The one-side fabricated formwork erection construction method according to claim 1, characterized in that: in the concrete curing step, the natural curing of the poured concrete is started before the final setting of the concrete, and the concrete mixed by Portland cement, common Portland cement and the like is adopted within the watering curing time of the concrete, so that the curing time is not less than 7 days.
6. The one-side fabricated formwork erection construction method according to claim 5, characterized in that: in the concrete curing step, after concrete pouring is finished and certain strength is achieved, the templates on the two sides are loosened in time, the distance between the templates and the gap is about 3-5 mm, a water spraying pipe is erected at the top of the wall body for spraying and curing, curing agents are sprayed on vertical surfaces on the two sides of the wall after the templates are removed, the wall surface is prevented from being directly irradiated by sunlight, and continuous spraying and curing are carried out.
7. The one-side fabricated formwork erection construction method according to claim 1, characterized in that: the formwork supporting structure comprises inclined supporting rods, a first embedded part, a second embedded part, a wall formwork and vertical ribs, wherein the wall formwork is vertically arranged, inner keels are arranged on the surface of one side, away from a wall, of the wall formwork, the inner keels are longitudinally arranged and are distributed at equal intervals along the horizontal direction of the wall formwork, a supporting table is arranged on one side, away from the wall formwork, of the inner keels, the supporting table is distributed at equal intervals along the longitudinal direction of the inner keels, outer keels are horizontally arranged on the supporting table, the first embedded part is arranged on the ground and is positioned on one side close to the wall formwork, the second embedded part is arranged on the ground and is positioned on one side away from the wall formwork, the vertical ribs are longitudinally arranged and are tightly attached to the outer keels, the lower ends of the vertical ribs are connected with the first embedded part, the upper ends of the inclined supporting rods are hinged to the upper portions of the vertical ribs, and the lower ends of the inclined supporting rods are hinged to the second embedded part, the diagonal brace, the vertical ridges and the ground form a right-angled triangle structure, and the length of the diagonal brace is adjustable.
8. The one-side fabricated formwork erection construction method according to claim 7, characterized in that: the first pre-buried part comprises a first pre-buried part and a first connecting assembly, the first pre-buried part is buried on the ground, the first connecting assembly is installed on the first pre-buried part and used for connecting the lower end of the vertical rib, the first connecting assembly comprises a connecting seat and a pressing mechanism, the connecting seat is installed on the first pre-buried part, the connecting seat is hollow and open at the top, sliding grooves are oppositely formed in two sides of the connecting seat, a first pin rod is arranged in the connecting seat and connected with the lower end of the vertical rib along the sliding grooves and the sliding grooves in a sliding mode, the pressing mechanism is installed on the connecting seat, one end of the pressing mechanism extends into the connecting seat and is contacted with the lower portion of the vertical rib, the pressing mechanism is adjusted to enable the pressing mechanism to prop the vertical rib to slide to one side of the wall formwork to enable the vertical rib to be tightly attached to the outer keel, and the pressing mechanism comprises a pressing plate, The pressing plate is positioned in the connecting seat, the connecting screw penetrates through the connecting seat and is fixed with the pressing plate in the connecting seat, and the adjusting nut is positioned outside the connecting seat and sleeved on the connecting screw and used for fixing the connecting screw and the connecting seat, so that the lower part of the vertical edge is propped against by the pressing plate, and the vertical edge is tightly attached to the outer keel.
9. The one-side fabricated formwork erection construction method according to claim 8, characterized in that: the second pre-buried part comprises a second pre-buried part and connecting grooves, the second pre-buried part is buried underground on the ground, the connecting grooves are installed on the second pre-buried part and used for being connected with the lower ends of the inclined struts, the two sides of the connecting grooves are symmetrically provided with positioning holes, second pin rods are arranged in the connecting grooves and penetrate through the lower ends of the inclined struts and the positioning holes in the connecting grooves, the lower ends of the inclined struts are connected with the connecting grooves, and the positioning holes are evenly distributed along the two sides of the connecting grooves at equal intervals.
10. The one-side fabricated formwork erection construction method according to claim 9, characterized in that: and a base plate is arranged below the connecting groove and the connecting seat.
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| CN115370215A (en) * | 2022-09-22 | 2022-11-22 | 中钢石家庄工程设计研究院有限公司 | Reinforcing apparatus of anticorrosive plain carbon steel communication tower of tombarthite |
| CN115467689A (en) * | 2022-11-01 | 2022-12-13 | 中铁隧道局集团路桥工程有限公司 | Side wall steel bar protection layer and construction method thereof |
| CN115467519A (en) * | 2022-09-21 | 2022-12-13 | 中交第二公路工程局有限公司 | Construction process for single-side formwork support of side wall formwork |
| CN115492136A (en) * | 2022-11-01 | 2022-12-20 | 中国建筑第五工程局有限公司 | Reinforcing device and reinforcing method for side wall of irregular rock stratum |
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| CN115492136A (en) * | 2022-11-01 | 2022-12-20 | 中国建筑第五工程局有限公司 | Reinforcing device and reinforcing method for side wall of irregular rock stratum |
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| CN114658219B (en) | 2024-02-06 |
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