CN110230397B - Construction method of building space dislocation overhanging terrace - Google Patents
Construction method of building space dislocation overhanging terrace Download PDFInfo
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- CN110230397B CN110230397B CN201910520952.9A CN201910520952A CN110230397B CN 110230397 B CN110230397 B CN 110230397B CN 201910520952 A CN201910520952 A CN 201910520952A CN 110230397 B CN110230397 B CN 110230397B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/06—Falsework, 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
- E04G13/066—Falsework, 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 overhangs
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
- E04G5/046—Means for fastening, supporting, or bracing scaffolds on or against building constructions for fastening scaffoldings on walls
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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
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/16—Struts or stiffening rods, e.g. diagonal rods
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- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a construction method of a spatial dislocation overhanging terrace of a building, which comprises the following steps of firstly, positioning a terrace construction formwork; secondly, constructing a first dislocation terrace unit section; thirdly, constructing the next staggered terrace unit section; fourthly, mounting a prestressed diagonal draw bar in the previous dislocation terrace unit section; fifthly, dismantling a terrace construction formwork below the overhanging terrace in the previous dislocation terrace unit section; sixthly, the steps from the third step to the fifth step are circulated for multiple times until the construction of the cantilever terraces of all floors is completed; and seventhly, dismantling the rest terrace construction formwork. According to the invention, the spatial dislocation cantilever terrace is divided into a plurality of dislocation terrace unit sections for segmented construction, and meanwhile, the prestress diagonal draw bar is additionally arranged between the constructed cantilever terrace and the building main body structure for reinforcement, so that the bearing capacity of the cantilever terrace can be improved, the cantilever terrace can directly bear the vertical load on the upper part, the terrace construction formwork on the lower part can be removed in advance, and the turnover of the terrace construction formwork erection construction materials is accelerated.
Description
Technical Field
The invention belongs to the technical field of construction of an external cantilever structure of a building main body, and particularly relates to a construction method of a building space dislocation cantilever terrace.
Background
In the building engineering, an aerial cantilever structure is often designed, and particularly, a multi-level and multi-specification large cantilever terrace structure appears in high-grade houses, office buildings, public buildings and the like in recent years. Because the construction environment of the high-altitude overhanging structure formwork is complex, the danger is high, the difficulty is high, and before the concrete reaches the design strength, particularly when a multilayer structure is continuously constructed on the upper part of the concrete, a support system on the lower part of a component cannot be dismounted in advance, so that the occupied construction material has long turnover period and high construction cost.
At present, the shaped steel support is adopted, and the tower crane or other large-scale vertical hoisting equipment is easy to install and difficult to dismantle midway. In addition, the operation risk of workers is high in the process of high-altitude operation, and the construction method is not suitable for the construction of a multi-layer staggered cantilever structure. The method for dismantling the formwork and the supporting system in advance mostly adopts the early dismantling component arranged on the upright rod of the scaffold of the supporting system to realize the dismantling of the bottom formwork of the component in advance, but the supporting frame body can not be dismantled in advance. Or a mode of replacing the support is adopted, namely when the concrete reaches certain design strength, the component is supported by another more economic material and mode, the originally erected support system is dismantled, after the upper structure is completely finished and the form removal strength is reached, the component can be completely dismantled, the structural quality control and construction safety risk is large, and the construction cost is high.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a construction method of a spatial dislocation cantilever balcony of a building aiming at the defects in the prior art, the spatial dislocation cantilever balcony is divided into a plurality of dislocation balcony unit sections for segmented construction, and meanwhile, a prestressed diagonal draw bar is additionally arranged between the constructed cantilever balcony and a building main body structure for reinforcement, so that the bearing capacity of the cantilever balcony can be improved, the cantilever balcony can directly bear the vertical load transmitted by the upper part, the early dismantling of a balcony construction formwork at the lower part is realized, the turnover of formwork construction of the balcony is further accelerated, and the economic benefit is improved.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a building space dislocation balcony of encorbelmenting construction method, the balcony of encorbelmenting of space dislocation includes a plurality of dislocation balcony unit sections of laying in proper order by supreme down along building subject direction of height, N continuous floor is strideed across to dislocation balcony unit section, wherein, N is positive integer and 2 < N < 5, and the outside balcony of encorbelmenting of two arbitrary floors in same dislocation balcony unit section is all misplaced and is laid, its characterized in that, this method includes following step:
step one, positioning a terrace construction formwork: determining the space between the scaffold upright rods of the terrace construction formwork and popping up the position line of the scaffold upright rods on the ground according to the construction drawing of the spatial dislocation overhanging terrace;
step two, the construction of the first dislocation terrace unit section comprises the following steps:
step 201, constructing a first-layer cantilever terrace, and the process is as follows:
step 2011, building a first-layer terrace construction formwork: according to the position line popped up in the first step, a full scaffold is erected on the ground on one side of the building main body from bottom to top to form a first-layer terrace construction formwork;
step 2012, installing a template of a first-layer cantilever terrace, namely installing a bottom formwork of the first-layer cantilever terrace at the design position of the cantilever terrace on a first-layer terrace construction formwork, binding reinforcing steel bars of a cantilever terrace beam and a slab on the bottom formwork, binding the reinforcing steel bars of the cantilever terrace beam and the building main body reinforcing steel bars into a whole, binding the reinforcing steel bars of the cantilever terrace and the reinforcing steel bars of the cantilever terrace beam into a whole, installing a first pre-embedded anchor at the cantilever section of the reinforcing steel bars of the cantilever terrace beam, forming a casting cavity of the cantilever terrace after installing side molds of the cantilever terrace on the bottom formwork, and positioning the reinforcing steel bars of the cantilever terrace beam and the slab in the casting cavity of the cantilever terrace;
step 2013, pouring concrete in the cantilever terrace pouring cavity to form a first-layer cantilever terrace, wherein the upper end of the first pre-buried anchor extends to the upper surface of the poured cantilever terrace;
the cantilever terrace comprises cantilever main beams at two sides, a sealing edge beam connected between the end parts of the two cantilever main beams and a terrace floor slab arranged between the two cantilever main beams and the sealing edge beam;
step 202, constructing the subsequent cantilever terrace, wherein the process is as follows:
step 2021, positioning a terrace construction formwork above the overhanging terrace: popping a scaffold upright rod position line of a subsequent-layer terrace construction formwork at the position of the cantilever terrace according to a construction drawing on the upper surface of the previous-layer terrace;
step 2022, building a subsequent terrace construction formwork: continuously erecting a scaffold from bottom to top at the upper part of a scaffold upright rod which is not shielded by an overhanging terrace in a previous layer of terrace construction formwork to form a terrace-free construction formwork, erecting the scaffold on the previous layer of overhanging terrace according to a position line popped up on the previous layer of overhanging terrace to form the terrace construction formwork, wherein the horizontal rods of the terrace-free construction formwork and the terrace construction formwork correspond one by one and are connected to form the subsequent layer of terrace construction formwork integrally, a zigzag diagonal brace is arranged in a step distance at the bottom of the terrace construction formwork through a steel pipe fastener to form a stepped horizontal truss structure, and two ends of the zigzag diagonal brace extend outwards respectively and are fixedly connected with the terrace-free construction formworks at two sides of the zigzag diagonal brace;
step 2023, regarding the subsequent-layer terrace construction formwork as a first-layer terrace construction formwork, and repeating the steps 2012 to 2013 to complete the construction of the subsequent-layer overhanging terrace;
step 203, repeating step 202N-2 times to complete the construction of the first dislocation terrace unit section;
step three, construction of the next dislocation terrace unit section: repeating the step 202 for N times to finish the construction of the next staggered terrace unit section;
step four, mounting the prestressed diagonal draw bar in the previous dislocation terrace unit section: oblique tying and reinforcing cantilever terraces of all floors in the last staggered terrace unit section of the staggered terrace unit section constructed in the third step, arranging a prestressed diagonal draw bar between each cantilever terrace and a corresponding floor upright post, arranging a second pre-buried anchor at the upper end of each floor upright post, connecting one end of each prestressed diagonal draw bar with the first pre-buried anchor, and connecting the other end of each prestressed diagonal draw bar with the second pre-buried anchor;
step five, dismantling the terrace construction formwork below the overhanging terrace in the previous dislocation terrace unit section: removing bottom forms and side forms of all the cantilever terraces with the prestressed diagonal draw bars installed in the fourth step, and removing unstressed terrace construction formwork below all the cantilever terraces with the prestressed diagonal draw bars installed;
step six, the step three to the step five are circulated for multiple times until the construction of the cantilever terraces of all floors is completed;
step seven, dismantling the rest terrace construction formwork: and (4) completely removing all the prestressed diagonal draw bars, the undetached bottom die, the undetached side die and the undetached terrace construction die carrier.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the first pre-buried anchor comprises a first pre-buried sleeve and two oblique anchor rods fixed at the lower end of the first pre-buried sleeve, the two oblique anchor rods are welded on two sides of the first pre-buried sleeve respectively, and the first pre-buried sleeve and the oblique anchor rods are parallel to each other.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the slant stock anchor is in the balcony of encorbelmenting, the one end anchor of first pre-buried sleeve is in the balcony of encorbelmenting, the other end of first pre-buried sleeve upwards stretches out to the balcony upper surface of encorbelmenting to one side.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the second pre-buried anchor comprises a second pre-buried sleeve and two horizontal anchor rods fixed at one end of the second pre-buried sleeve, the second pre-buried sleeve and the first pre-buried sleeve are identical in structure and size, the two horizontal anchor rods are welded to two sides of the second pre-buried sleeve respectively, and the second pre-buried sleeve is arranged horizontally.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the second embedded sleeve is anchored in the floor stand column through a horizontal anchor rod, and the outer end face of the second embedded sleeve is flush with the outer vertical face of the floor stand column.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the lower end of the prestressed diagonal draw bar is provided with a first connecting bent plate, the first connecting bent plate is an L-shaped bent plate, one connecting plate of the first connecting bent plate is welded at the lower end of the prestressed diagonal draw bar and is parallel to the prestressed diagonal draw bar, the other connecting plate of the first connecting bent plate is connected with a first embedded sleeve through a first connecting bolt, and an internal thread matched with the first connecting bolt is formed in the first embedded sleeve;
the upper end of prestressing force diagonal draw bar is provided with the second and connects the bent plate, a connecting plate welding of bent plate is connected in the upper end of prestressing force diagonal draw bar to the second, another connecting plate of bent plate is connected to the second passes through second connecting bolt and the pre-buried sleeve fastening connection of second, set up in the pre-buried sleeve of second and connect bolt matched with internal thread.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: the horizontal floor sweeping rod with the terrace construction formwork is provided with a zigzag diagonal brace, and the zigzag diagonal brace is arranged along the length direction of the horizontal floor sweeping rod.
The construction method of the building space dislocation cantilever terrace is characterized by comprising the following steps of: and step six, after each complete dislocation terrace unit section is constructed in sequence, repeating the step 202 for K times when cantilever terraces of K floors still exist on the top of the building main body and are not constructed, wherein K is a positive integer and is less than N, and completing construction of cantilever terraces of the rest floors.
Compared with the prior art, the invention has the following advantages:
1. the construction method adopted by the invention has simple steps and convenient and fast construction, when the overhanging exposure platform is arranged at the upper part of the construction formwork, the construction formwork can provide support for the overhanging exposure platform, and when the overhanging exposure platform is not arranged at the upper part of the construction formwork, the construction formwork can play a role of protection, so that an operator can always be positioned on a construction formwork platform or carry out construction operation in the construction formwork, the harm to the operator caused by the suspended operation is avoided, the construction safety and the construction efficiency can be effectively improved, and the labor intensity is reduced.
2. The invention utilizes the material characteristics of the cantilever terrace structure, improves the bearing capacity of the cantilever terrace structure by arranging the prestressed diagonal draw bar on the cantilever terrace, changes the cantilever structure into the bearing mode of a simply supported structure, ensures that the cantilever structure can directly bear the construction load of the upper part, not only ensures the construction safety of the upper cantilever terrace structure, but also can remove the lower terrace construction formwork in advance, realizes the sectional removal of the terrace construction formwork, improves the turnover performance of construction materials, and further effectively reduces the construction cost.
3. The invention enables the terrace construction formwork and the terrace-free construction formwork on two sides to form a continuous truss girder structure by arranging the zigzag diagonal bracing at the bottom of the terrace construction formwork, can effectively improve the integrity of the terrace construction formwork, and can support the construction formwork on two sides of the overhanging terrace, thereby improving the bearing capacity of the whole terrace construction formwork.
In conclusion, the spatial dislocation cantilever terrace is divided into a plurality of dislocation terrace unit sections for subsection construction, and meanwhile, the prestress diagonal draw bar is additionally arranged between the constructed cantilever terrace and the building main body structure for reinforcement, so that the bearing capacity of the cantilever terrace can be improved, the cantilever terrace can directly bear the vertical load transmitted by the upper part, the terrace construction formwork at the lower part is dismantled in advance, the turnover of terrace construction formwork erection construction materials is accelerated on the basis of ensuring the engineering quality, and the economic benefit is improved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural view of the spatial offset cantilever terrace of the present invention.
Fig. 2 is a schematic construction structure view of a first dislocation terrace unit section according to the present invention.
Fig. 3 is a schematic construction structure diagram of a first dislocation terrace unit section and a next dislocation terrace unit section according to the present invention.
Fig. 4 is a schematic construction structure diagram of a first dislocation terrace unit section and two subsequent dislocation terrace unit sections according to the present invention.
Fig. 5 is a schematic view of the installation structure of the prestressed diagonal member of the present invention.
Fig. 6 is an enlarged view of fig. 5 at a.
Fig. 7 is an enlarged view of fig. 5 at B.
FIG. 8 is a block flow diagram of a method of the present invention.
Description of reference numerals:
1-cantilever terrace; 1-overhanging main beam; 1-2-edge sealing beam;
1-3-terrace floor slab; 2-floor column; 3, prestressed diagonal draw bars;
4-a zig-zag diagonal strut; 5, a first embedded sleeve; 6, an oblique anchor rod;
7, a second embedded sleeve; 8-horizontal anchor rod; 9-a first connecting bent plate;
10-a first connecting bolt; 11-a second connecting bent plate; 12-a second connecting bolt;
13-terrace construction formwork.
Detailed Description
The utility model provides a building space dislocation balcony of encorbelmenting construction method, as shown in figure 1, the balcony of encorbelmenting of space dislocation includes a plurality of dislocation balcony unit sections of laying in proper order by supreme down along building subject direction of height, N continuous floor is strideed across to dislocation balcony unit section, and wherein, N is positive integer and 2 < N < 5, and the outside balcony 1 of encorbelmenting of two arbitrary floors in same dislocation balcony unit section is all misplaced and is laid, as shown in figure 8, this method includes following step:
during the in-service use, 4 continuous floors are strideed across to dislocation balcony unit section, promptly the space dislocation balcony of encorbelmenting circulates once for every four layers, can satisfy the daylighting requirement of each layer balcony of encorbelmenting like this.
In this embodiment, when carrying out the construction of space dislocation balcony of encorbelmenting, the terrace is encorbelmented in space dislocation is upwards under construction along with the building main part is synchronous layer by layer, and balcony construction die carrier 13 adopts the fastener steel pipe to set up in step with the building main part frame and is connected, balcony construction die carrier 13 adopts the wall screw rod with the wall or the column template of building main part structure to be connected, the wall screw rod welding is in the tip of vertical horizontal pole, be provided with on the wall or the column template of building main part structure a plurality ofly and the wall bolt hole of wearing that the wall screw rod is mutually supported, the joint space between balcony construction die carrier 13 and the building main part die carrier is not more than two-step three-span.
It should be noted that, by constructing the spatial dislocation overhanging terrace and the building main body synchronously, the construction efficiency can be effectively improved, and meanwhile, the construction difficulty of the spatial dislocation overhanging terrace can be reduced, so that the spatial dislocation overhanging terrace and the building main body are constructed and formed synchronously, and the safety strength of the structure of the overhanging terrace 1 can be improved.
Step one, positioning a terrace construction formwork: determining the space between the scaffold upright rods of the terrace construction formwork 13 and popping up the position line of the scaffold upright rods on the ground according to the construction drawing of the spatial dislocation overhanging terrace;
the terrace construction formwork and the building main body formwork are synchronously erected upwards layer by layer, the terrace construction formwork and the building main body formwork are lapped and fixed into a whole, and the overhanging terrace 1 of each floor is synchronously poured and molded with the corresponding floor structure on the building main body;
during the in-service use, according to the construction drawing of the space dislocation balcony of encorbelmenting, determine the scaffold frame pole setting interval of balcony construction die carrier 13, guarantee that every scaffold frame pole setting homoenergetic of encorbelmenting balcony construction position lower part plays effective support to the die block of the balcony of encorbelmenting, improve the security and the reliability of balcony construction, simultaneously, confirm in advance that scaffold frame pole setting interval is good, can satisfy and bear the weight of the requirement, shorten the engineering time, avoid adjusting scaffold frame pole setting position once more according to the construction conditions in the work progress.
In this embodiment, the scaffold frame pole setting interval of balcony construction die carrier is unanimous, and the setting of drawing through of the vertical horizon bar of the scaffold frame of being convenient for and horizontal horizon bar is set up with unifying, and interior row of scaffold frame pole setting is not more than 0.5m with the outer wall interval of building main part, and outer row of scaffold frame pole setting is on the balcony banding roof beam center axis of encorbelmenting. The vertical distance and the transverse distance of the upright rods of the scaffold are uniformly arranged at equal intervals as far as possible without considering the position of the cantilever terrace 1, and the step pitch is not more than 1.5 m. When the horizontal rod and the longitudinal horizontal rod meet the overhanging terrace 1 to cause local disconnection, a horizontal rod and a longitudinal horizontal rod are additionally arranged at corresponding positions on or under the overhanging terrace, and are extended to two ends for being fixed with the frame bodies on two sides in a pulling mode.
Step two, the construction of the first dislocation terrace unit section comprises the following steps:
during actual use, before the construction of the spatial dislocation overhanging terrace is carried out, firstly, parameters are set up according to a scaffold determined by structure and construction design load, full supporting scaffolds are set up in the area covered by the overhanging terrace of each floor, the overhanging terrace is constructed according to a conventional formwork, and the overhanging terrace is used as a protective frame when no terrace exists and is synchronously and integrally set up upwards with a construction formwork on the upper part of the terrace to form a continuous skip layer type supporting system.
Step 201, constructing a first-layer cantilever terrace, and the process is as follows:
step 2011, building a first-layer terrace construction formwork: as shown in fig. 2, according to the position line popped up in the first step, a full scaffold is erected on the ground on one side of the building body from bottom to top to form a first-layer terrace construction formwork;
during the in-service use, when carrying out the setting up of first layer balcony construction die carrier, begin to adopt the full hall frame of console mode from subaerial and set up by lower supreme succession, when needing the construction to encorbelment balcony 1 above the scaffold frame pole setting of first layer balcony construction die carrier, then set up a formwork scaffold according to construction drawing requirement and the size that upper portion encorbelment balcony 1 should support to carry out the fixed and installation of encorbelment balcony template, when the temporary emergence of encorbelment balcony above the scaffold frame pole setting of first layer balcony construction die carrier encorbelment the balcony, continue to set up the scaffold frame upwards.
Step 2012, installing a template of a first-layer cantilever terrace, namely installing a bottom formwork of the first-layer cantilever terrace at the design position of the cantilever terrace on a first-layer terrace construction formwork, binding reinforcing steel bars of a cantilever terrace beam and a slab on the bottom formwork, binding the reinforcing steel bars of the cantilever terrace beam and the building main body reinforcing steel bars into a whole, binding the reinforcing steel bars of the cantilever terrace and the reinforcing steel bars of the cantilever terrace beam into a whole, installing a first pre-embedded anchor at the cantilever section of the reinforcing steel bars of the cantilever terrace beam, forming a casting cavity of the cantilever terrace after installing side molds of the cantilever terrace on the bottom formwork, and positioning the reinforcing steel bars of the cantilever terrace beam and the slab in the casting cavity of the cantilever terrace;
in this embodiment, before the installation of die block, at first need hang the design position installation of balcony on balcony construction die carrier and hang a plurality of horizontal steel pipe owner stupefied and be used for supporting the die block of balcony of encorbelmenting, the end of encorbelmenting of the bottom reinforcing bar of girder is fixed at the lower extreme of first pre-buried anchor, the upper end of first pre-buried anchor inclines towards one side of building main part.
In actual use, when the horizontal steel pipe main ridges of the cantilever balcony beam and the slab are supported, the horizontal steel pipes can be installed on the scaffold upright rods on the two sides of the cantilever balcony 1 by adopting double fasteners to support the cantilever main beam 1-1; when the edge banding beam formwork outside the overhanging terrace 1 is supported, the adjustable supporters can be arranged on the scaffold upright rods at the lower part of the edge banding beam of the overhanging terrace 1, and the double-steel-pipe main edges of the edge banding beam formwork are supported by the adjustable supporters. Two main stupefied one ends of two horizontal steel pipe in two main stupefied of steel pipe are all fixed on terrace construction die carrier, and two main stupefied other ends of two horizontal steel pipe in two main stupefied of steel pipe stretch out to the length in terrace construction die carrier outside is 0.7m, and two main stupefied lower parts of two horizontal steel pipe in two main stupefied of steel pipe all set up an diagonal brace, the upper end of diagonal brace is fixed at the end of encorbelmenting of horizontal steel pipe main stupefied, and the lower extreme of diagonal brace is fixed on terrace construction die carrier, is connected with horizontal steel pipe between a plurality of two main stupefied of steel pipe, and the outer end that horizontal steel pipe main stupefied is provided with vertical protection pole setting, the height of vertical protection pole setting is 1.5m, is provided with multichannel horizontal protection railing between the vertical protection pole.
In this embodiment, horizontal horizon bar and vertical horizon bar and the 1 both sides scaffold frame of balcony of encorbelmenting of balcony are upwards set up in step in succession, when meetting the balcony design position of encorbelmenting, set up the enhancement horizon bar in the upper portion and the lower part position nearby of balcony design position of encorbelmenting.
When the platform construction formwork is actually used, the first pre-buried anchor is installed at the end part of the cantilever main beam, and the first pre-buried anchor is anchored between two rows of vertical rods on the outer side of the platform construction formwork.
Step 2013, pouring concrete in the cantilever terrace pouring cavity to form a first layer of cantilever terrace 1, wherein the upper end of the first pre-buried anchor extends to the upper surface of the poured cantilever terrace 1;
the cantilever terrace 1 comprises cantilever main beams 1-1 at two sides, edge sealing beams 1-2 connected between the end parts of the two cantilever main beams 1-1, and terrace floor slabs 1-3 arranged between the two cantilever main beams 1-1 and the edge sealing beams 1-2;
step 202, constructing the subsequent cantilever terrace, wherein the process is as follows:
step 2021, positioning a terrace construction formwork above the overhanging terrace: popping a scaffold upright rod position line of a subsequent-layer terrace construction formwork at the position of the cantilever terrace 1 on the upper surface of the previous-layer terrace 1 according to a construction drawing;
during the in-service use, the scaffold pole setting position line on the balcony 1 of encorbelmenting and the scaffold pole setting one-to-one of the 1 lower part of balcony of encorbelmenting are convenient for make balcony construction die carrier of 1 top of balcony and below of encorbelmenting and die carrier overlap joint on every side become a whole.
Step 2022, building a subsequent terrace construction formwork: continuously erecting a scaffold on the upper part of a scaffold upright rod which is not shielded by an overhanging terrace 1 in a previous-layer terrace construction formwork from bottom to top to form a terrace-free construction formwork, erecting the scaffold on the previous-layer overhanging terrace 1 according to a position line popped up on the previous-layer overhanging terrace 1 to form a terrace construction formwork, wherein the horizontal rods of the terrace-free construction formwork and the terrace construction formwork correspond one by one and are connected to form a subsequent-layer terrace construction formwork integrally, a zigzag diagonal brace 4 is arranged in a step distance at the bottom of the terrace construction formwork through a steel pipe fastener to form a stepped horizontal truss structure, and two ends of the zigzag diagonal brace 4 extend outwards respectively and are fastened and connected with the terrace-free construction formworks on two sides of the zigzag diagonal brace 4;
during the in-service use, the bottom that has balcony construction die carrier is provided with vertically sweeps ground pole and transversely sweeps ground pole, constructs into continuous truss girder form through the one step setting up the diagonal brace 4 below having two rows of scaffold frame pole settings of balcony construction die carrier outermost, the diagonal web member of diagonal brace 4 adopts short steel pipe fastener joint construction to continue to the scaffold frame pole setting department of striding of 1 both sides of balcony construction die carrier of encorbelmenting, can improve the bulk strength of balcony construction die carrier, provide an oblique brace power for the balcony construction die carrier of 1 both sides of balcony of encorbelmenting simultaneously.
It should be noted that, after the zigzag diagonal brace 4 extends outwards, the zigzag diagonal brace is tightly connected with one span to two spans of the non-terrace construction formwork which are close to the terrace construction formwork.
Step 2023, regarding the subsequent-layer terrace construction formwork as a first-layer terrace construction formwork, and repeating the steps 2012 to 2013 to complete the construction of the subsequent-layer overhanging terrace;
step 203, repeating step 202N-2 times to complete the construction of the first dislocation terrace unit section;
during the in-service use, the scaffold pole setting outside of balcony construction die carrier 13 sets up continuous bridging and hangs close mesh net fully, and per two-layer balcony construction die carrier interval sets up the inoxidizing coating between gentle, the rigid layer one, 1 lateral surface of balcony of encorbelmenting is provided with a plurality of protection railing, protection railing sets up the outside at the lateral part support frame, the vertical horizon bar of lateral part support frame stretches out to the length of encorbelmenting 1 outside of balcony is not more than 0.7m, protection railing is vertical to lay and its height is 1.5m, all is provided with the horizontal connecting rod between the middle part of two adjacent protection railings, protection railing inboard is fully hung close mesh net and establishes the baseboard, the full spread baseboard in individual layer horizontal support body top of lateral part support frame.
Step three, construction of the next dislocation terrace unit section: repeating the step 202 for N times to finish the construction of the next staggered terrace unit section;
during practical use, as shown in fig. 3, when the construction of the second dislocation terrace unit section is carried out, the terrace construction formwork at the lower part of the first dislocation terrace unit section needs to support the cantilever terrace 1, so that the terrace construction formwork at the lower part of the first dislocation terrace unit section is in a stressed state and cannot be detached.
Step four, mounting the prestressed diagonal draw bar in the previous dislocation terrace unit section: as shown in fig. 5, 6 and 7, the cantilever terraces 1 of all floors in the previous dislocation terrace unit section of the dislocation terrace unit section constructed in the third step are obliquely tied and reinforced, a prestressed diagonal draw bar 3 is arranged between each cantilever terrace 1 and the floor upright post 2 corresponding to the cantilever terrace 1, a second pre-buried anchor is arranged at the upper end of the floor upright post 2, one end of the prestressed diagonal draw bar 3 is connected with the first pre-buried anchor, and the other end of the prestressed diagonal draw bar 3 is connected with the second pre-buried anchor;
during the in-service use, after all the balcony 1 that encorbelments in the current dislocation balcony unit section construction is accomplished, the concrete intensity of each balcony 1 that encorbelments in the last dislocation balcony unit section has all reached more than 75% of design strength, consequently can all install prestressing force diagonal draw bar 3 and carry out the slant stretch-draw to each balcony 1 that encorbelments in the last dislocation balcony unit section.
It should be noted that the prestressed diagonal member 3 is made of a high-strength steel strand or a steel pipe.
It should be noted that, after the binding of the structural steel bars of the floor upright post is completed, the second pre-buried anchor is fixedly installed at the corresponding height of the structural steel bars of the floor upright post.
In actual use, the upper end and the lower end of the prestressed diagonal member 3 are fixedly connected by using a 10.8-grade high-strength bolt, the upper end of the prestressed diagonal member 3 is fixedly connected as a fixed end in advance, and when the lower end of the prestressed diagonal member 3 is installed and fastened, a torque wrench is used to apply a certain prestress to the prestressed diagonal member 3 by referring to a predetermined torque value. The preset moment value is obtained by testing more than three groups of prestressed diagonal draw bars in the installation process on site, namely, prestress is applied to the end part of the cantilever main beam 1-1 of the cantilever terrace, monitoring modes such as a dial indicator and a load monitoring sensor are utilized, when the prestress is applied to the concrete cantilever beam and micro deformation begins to occur, the fastening can be stopped, the final fastening moment value is recorded, and the average value +/-30 N.m of the three groups of prestressed diagonal draw bars 3 is taken as the preset moment value after all tests are completed.
Step five, dismantling the terrace construction formwork below the overhanging terrace in the previous dislocation terrace unit section: removing bottom moulds and side moulds of all the cantilever terraces 1 provided with the prestressed diagonal draw bars 3 in the fourth step, and removing unstressed terrace construction mould frames below all the cantilever terraces 1 provided with the prestressed diagonal draw bars 3;
in this embodiment, as shown in fig. 4, when the third dislocation terrace unit section is constructed, the lower part of the terrace construction formwork in the second dislocation terrace unit section is supported on the first dislocation terrace unit section, and each cantilever terrace 1 in the first dislocation terrace unit section is reinforced by the prestressed diagonal tension rod 3, so that the terrace construction formwork at the lower part of the first dislocation terrace unit section is not stressed and can be removed.
During the in-service use, because the load inequality that the dislocation structure of balcony 1 of encorbelmenting brought, through encorbelmenting the balcony with the space dislocation and dividing into a plurality of dislocation balcony unit sections, can be convenient for establish and satisfy the reasonable support system that bears in construction layer, the furthest of being convenient for demolish unnecessary balcony construction die carrier 13 in lower part in advance and establish the material of executing, and then realize that the segmentation of balcony construction die carrier 13 is demolishd, the turnover that is convenient for establish the material is used.
It should be noted that, when the terrace construction formwork 13 is dismantled in sections, two conditions need to be satisfied simultaneously: firstly, guarantee that the complete construction of the balcony 1 of encorbelmenting of next dislocation balcony unit section is accomplished, just can demolish balcony construction die carrier 13 of every 1 lower part of balcony of encorbelmenting in the last dislocation balcony unit section, promptly balcony construction die carrier 13 has enough to meet the need according to two dislocation balcony unit sections. Secondly, the concrete strength of the overhanging terrace 1 at the top of the removed terrace construction formwork 13 is over 75 percent. When three or four floors are selected as a dislocation terrace unit section for construction, when the cantilever terrace 1 of the next dislocation terrace unit section is completely constructed, the concrete strength of the cantilever terrace 1 of the previous dislocation terrace unit section exceeds more than 75%.
In this embodiment, when dismantling the terrace construction formwork 13 below the first dislocation terrace unit section, the formwork and the un-stressed terrace construction formwork 13 need to be dismantled layer by layer in the order from top to bottom, when dismantling the subsequent terrace construction formwork 13 below a plurality of dislocation terrace unit sections, the formwork and the un-stressed terrace construction formwork 13 of the cantilever terrace 1 need to be dismantled layer by layer in the order from top to bottom, and the prestressed diagonal draw bar 3 is dismantled afterwards. The dismantled facility materials are transferred to the indoor environment, transferred through the material transferring platform and used in a turnover mode, and the facility materials cannot be stacked on the overhanging terrace.
During the in-service use, when the concrete intensity of the balcony 1 of encorbelmenting that has pour reached 15% design intensity, the side form that the balcony 1 of encorbelmenting corresponds can be demolishd in advance, and in order to simplify the construction procedure, improve the efficiency of construction, the side form can be demolishd with the die block is synchronous.
Step six, the step three to the step five are circulated for multiple times until the construction of the cantilever terraces 1 of all floors is completed;
step seven, dismantling the rest terrace construction formwork: and (3) completely dismantling all the prestressed diagonal draw bars 3 and the un-dismantled bottom die, side die and terrace construction die carrier.
In actual use, when all the cantilever terraces are constructed and the concrete strength of the cantilever terraces 1 on the topmost layer of the building reaches more than 100% of the design strength, the rest bottom die, side die and terrace construction die frames 13 can be completely dismantled.
In the whole construction process, when there is no load on the upper portion of the cantilever terrace 1, that is, the terrace construction formwork 13 on the upper surface of the cantilever terrace 1 is removed, the prestressed diagonal members 3 corresponding thereto can be removed, and the turnover use can be performed.
In this embodiment, first pre-buried anchor includes first pre-buried sleeve 5 and two slant stock 6 of fixing at first pre-buried sleeve 5 lower extreme, two slant stock 6 welds respectively in the both sides of first pre-buried sleeve 5, first pre-buried sleeve 5 and slant stock 6 are all parallel to each other with prestressing force diagonal draw bar 3.
During the in-service use, set up slant stock 6 through the lower part at first pre-buried sleeve 5, can make first pre-buried sleeve 5 fix on the reinforcing bar of girder 1-1 encorbelments through slant stock 6, the lower part of slant stock 6 is provided with the crotch, crotch and 6 integrated into one piece of slant stock, two the crotch orientation of slant stock 6 is opposite and two the crotch is as an organic whole with the reinforcement of girder 1-1 encorbelments, when encorbelmenting dew-top 1, keeps first pre-buried sleeve 5 steady.
In this embodiment, 6 anchors of slant stock are in the balcony 1 of encorbelmenting, the one end anchor of first pre-buried sleeve 5 is in the balcony 1 of encorbelmenting, the other end of first pre-buried sleeve 5 upwards stretches out to the balcony 1 upper surface of encorbelmenting to one side.
During the in-service use, the other end of first pre-buried sleeve 5 upwards inclines and makes its tip whole expose to the terrace 1 upper surface of encorbelmenting, can be convenient for the installation of prestressing force diagonal draw bar 3.
In this embodiment, the second pre-buried anchor includes second pre-buried sleeve 7 and two horizontal stock 8 of fixing in second pre-buried sleeve 7 one end, second pre-buried sleeve 7 is the same with first pre-buried sleeve 5's structure and size, and two horizontal stock 8 weld respectively in the both sides of second pre-buried sleeve 7, second pre-buried sleeve 7 is the level and lays.
During the in-service use, the structure and the size homogeneous phase of second embedded sleeve 7 and first embedded sleeve 5 are convenient for concentrate processing and preparation, horizontal stock 8 is L shape stock, two the crotch of horizontal stock 8 all sets up outwards and is fixed with the main muscle ligature of floor stand 2, 7 horizontal installation of second embedded sleeve are on floor stand 2, and 7 distances of second embedded sleeve from this layer of roof are 150 mm.
In this embodiment, the second embedded sleeve 7 is anchored in the floor column 2 through the horizontal anchor rod 8, and the outer end surface of the second embedded sleeve 7 is flush with the outer vertical surface of the floor column 2.
During the in-service use, through with the second embedded sleeve 7 anchor in floor stand 2, can improve the installation reliability of second embedded sleeve 7, and then make second embedded sleeve 7 can bear bigger pulling force.
In this embodiment, the lower end of the prestressed diagonal member 3 is provided with a first connecting bent plate 9, the first connecting bent plate 9 is an L-shaped bent plate, one connecting plate of the first connecting bent plate 9 is welded to the lower end of the prestressed diagonal member 3 and is parallel to the prestressed diagonal member 3, the other connecting plate of the first connecting bent plate 9 is connected with a first embedded sleeve 5 through a first connecting bolt 10, and an internal thread matched with the first connecting bolt 10 is formed in the first embedded sleeve 5;
the upper end of prestressing force diagonal draw bar 3 is provided with the second and connects bent plate 11, a connecting plate welding of bent plate 11 is connected at the upper end of prestressing force diagonal draw bar 3 to the second, another connecting plate of bent plate 11 is connected to the second passes through second connecting bolt 12 and the pre-buried sleeve 7 fastening connection of second, set up the internal thread with second connecting bolt 12 matched with in the pre-buried sleeve 7 of second.
When the pre-buried sleeve is actually used, the first connecting bent plate 9 is arranged at the lower end of the pre-stressed diagonal member 3, so that the pre-stressed diagonal member 3 can be conveniently connected and fixed with the first pre-buried sleeve 5, one connecting plate of the first connecting bent plate 9 is welded at the lower end of the pre-stressed diagonal member 3, and the other connecting plate of the first connecting bent plate 9 is parallel to the end surface of the first pre-buried sleeve 5; through set up the internal thread in first pre-buried sleeve 5 and be connected first connecting bent plate 9 and first pre-buried sleeve 5 through first connecting bolt 10, be convenient for installation and dismantlement are convenient for adjust the pulling force of prestressing force diagonal member 3 simultaneously, set up the bolt hole that supplies first connecting bolt 10 to pass on the first connecting bent plate 9.
It should be noted that the second connecting bent plate 11 is a broken line type connecting steel plate, a bolt hole for the second connecting bolt 12 to pass through is formed in one connecting plate, perpendicular to the second embedded sleeve 7, of the second connecting bent plate 11, and the second connecting bolt 12 and the first connecting bolt 10 are identical in structure and size.
In this embodiment, have terrace construction die carrier transversely sweep and all be provided with a zigzag bracing 4 on the pole, zigzag bracing 4 is laid along the length direction of the pole of transversely sweeping the floor.
During the in-service use, through set up the diagonal brace 4 of the zigzag on the horizontal pole of sweeping the ground that has the balcony construction die carrier, can form a continuous truss roof beam with the no balcony construction die carrier of both sides and have the balcony construction die carrier through the diagonal brace 4 of the zigzag, and then make there to be the balcony construction die carrier to provide certain support for no balcony construction die carrier.
In this embodiment, in the sixth step, after each complete dislocation balcony unit section is constructed in sequence, when the cantilever balcony of K floors still exists at the top of the building body and is not constructed, where K is a positive integer and K is less than N, the step 202 is repeated K times, and the construction of the cantilever balcony of the remaining floors is completed.
During the in-service use, the space dislocation balcony of encorbelmenting can comprise a plurality of complete dislocation balcony unit sections, the space dislocation balcony of encorbelmenting also can comprise the balcony 1 of encorbelmenting of a plurality of complete dislocation balcony unit sections and K individual floors, and the balcony 1 of encorbelmenting of K individual floors belongs to the partly of dislocation balcony unit section.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a building space dislocation balcony of encorbelmenting construction method, the balcony of encorbelmenting of space dislocation includes a plurality of dislocation balcony unit sections of laying in proper order by supreme down along building subject direction of height, N continuous floor is strideed across to dislocation balcony unit section, and wherein, N is positive integer and 2 < N < 5, and the outside balcony (1) of encorbelmenting of two arbitrary floors in same dislocation balcony unit section is all misplaced and is laid, its characterized in that, this method includes following step:
step one, positioning a terrace construction formwork: determining the space between the scaffold upright rods of the terrace construction formwork (13) and popping up the position line of the scaffold upright rods on the ground according to the construction drawing of the spatial dislocation overhanging terrace;
step two, the construction of the first dislocation terrace unit section comprises the following steps:
step 201, constructing a first-layer cantilever terrace, and the process is as follows:
step 2011, building a first-layer terrace construction formwork: according to the position line popped up in the first step, a full scaffold is erected on the ground on one side of the building main body from bottom to top to form a first-layer terrace construction formwork;
step 2012, installing a template of a first-layer cantilever terrace, namely installing a bottom formwork of the first-layer cantilever terrace at the design position of the cantilever terrace on a first-layer terrace construction formwork, binding reinforcing steel bars of a cantilever terrace beam and a slab on the bottom formwork, binding the reinforcing steel bars of the cantilever terrace beam and the main body reinforcing steel bars of a building into a whole, binding the reinforcing steel bars of the cantilever terrace and the reinforcing steel bars of the cantilever terrace beam into a whole, installing a first pre-embedded anchor at the cantilever section of the reinforcing steel bars of the cantilever terrace beam, forming a casting cavity of the cantilever terrace after installing a side form of the cantilever terrace on the bottom formwork, and positioning the reinforcing steel bars of the cantilever terrace beam and the slab in the casting cavity of the cantilever terrace;
step 2013, pouring concrete in the cantilever terrace pouring cavity to form a first layer of cantilever terrace (1), wherein the upper end of the first pre-buried anchor extends to the upper surface of the poured cantilever terrace (1);
the cantilever terrace (1) comprises cantilever main beams (1-1) at two sides, edge sealing beams (1-2) connected between the ends of the two cantilever main beams (1-1), and a terrace floor slab (1-3) arranged between the two cantilever main beams (1-1) and the edge sealing beams (1-2);
step 202, constructing the subsequent cantilever terrace, wherein the process is as follows:
step 2021, positioning a terrace construction formwork above the overhanging terrace: popping up a scaffold upright rod position line of a subsequent-layer terrace construction formwork at the position of the cantilever terrace (1) on the upper surface of the previous-layer terrace (1) according to a construction drawing;
step 2022, building a subsequent terrace construction formwork: continuously erecting a scaffold on the upper part of a scaffold upright rod which is not shielded by the overhanging terrace (1) in the previous terrace construction formwork from bottom to top to form a terrace-free construction formwork, erecting the scaffold on the overhanging terrace (1) of the previous terrace according to a position line popped up on the overhanging terrace (1) of the previous terrace to form a terrace construction formwork, wherein the terrace-free construction formwork and the transverse horizontal rods of the terrace construction formwork correspond to each other one by one and are connected into a whole to form a subsequent terrace construction formwork, a zigzag diagonal brace (4) is arranged in one step of the bottom of the terrace construction formwork through a steel pipe fastener to form a step-up horizontal truss structure, and two ends of the zigzag diagonal brace (4) extend outwards respectively and are fastened and connected with the terrace-free construction formworks on two sides of the zigzag diagonal brace;
step 2023, regarding the subsequent-layer terrace construction formwork as a first-layer terrace construction formwork, and repeating the steps 2012 to 2013 to complete the construction of the subsequent-layer overhanging terrace;
step 203, repeating step 202N-2 times to complete the construction of the first dislocation terrace unit section;
step three, construction of the next dislocation terrace unit section: repeating the step 202 for N times to finish the construction of the next staggered terrace unit section;
step four, mounting the prestressed diagonal draw bar in the previous dislocation terrace unit section: oblique tie reinforcement is carried out on the cantilever terraces (1) of all floors in the last dislocation terrace unit section of the dislocation terrace unit section constructed in the third step, a prestressed diagonal draw bar (3) is arranged between each cantilever terrace (1) and a floor upright post (2) corresponding to the cantilever terrace, a second pre-buried anchor is arranged at the upper end of each floor upright post (2), one end of the prestressed diagonal draw bar (3) is connected with the first pre-buried anchor, and the other end of the prestressed diagonal draw bar (3) is connected with the second pre-buried anchor;
step five, dismantling the terrace construction formwork below the overhanging terrace in the previous dislocation terrace unit section: removing bottom moulds and side moulds of all the overhanging terraces (1) provided with the prestressed diagonal draw bars (3) in the fourth step, and removing unstressed terrace construction mould frames below all the overhanging terraces (1) provided with the prestressed diagonal draw bars (3);
step six, the step three to the step five are circulated for multiple times until the construction of the cantilever terraces (1) of all floors is completed;
step seven, dismantling the rest terrace construction formwork: and (3) all the prestressed diagonal draw bars (3) and the undetached bottom die, side die and terrace construction die carriers are completely dismantled.
2. The construction method of the spatial dislocation overhanging terrace of the building according to claim 1, characterized in that: the first pre-buried anchor comprises a first pre-buried sleeve (5) and two oblique anchor rods (6) fixed to the lower end of the first pre-buried sleeve (5), the two oblique anchor rods (6) are welded to two sides of the first pre-buried sleeve (5) respectively, and the first pre-buried sleeve (5) and the oblique anchor rods (6) are parallel to each other with the prestress oblique pull rod (3).
3. The construction method of the spatial dislocation overhanging terrace of the building according to claim 2, characterized in that: slant stock (6) anchor is in balcony (1) of encorbelmenting, the one end anchor of first pre-buried sleeve (5) is in balcony (1) of encorbelmenting, the other end of first pre-buried sleeve (5) upwards stretches out to balcony (1) upper surface of encorbelmenting to one side.
4. The construction method of the spatial dislocation overhanging terrace of the building according to claim 3, characterized in that: the second embedded anchor comprises a second embedded sleeve (7) and two horizontal anchor rods (8) fixed to one end of the second embedded sleeve (7), the second embedded sleeve (7) and the first embedded sleeve (5) are identical in structure and size, the two horizontal anchor rods (8) are welded to two sides of the second embedded sleeve (7) respectively, and the second embedded sleeve (7) is horizontally arranged.
5. The construction method of the spatial dislocation overhanging terrace of the building according to claim 4, characterized in that: the second embedded sleeve (7) is anchored in the floor upright post (2) through a horizontal anchor rod (8), and the outer end face of the second embedded sleeve (7) is flush with the outer vertical face of the floor upright post (2).
6. The construction method of the spatial dislocation overhanging terrace of the building according to claim 5, characterized in that: the lower end of the prestressed diagonal draw bar (3) is provided with a first connecting bent plate (9), the first connecting bent plate (9) is an L-shaped bent plate, one connecting plate of the first connecting bent plate (9) is welded at the lower end of the prestressed diagonal draw bar (3) and is parallel to the prestressed diagonal draw bar (3), the other connecting plate of the first connecting bent plate (9) is connected with a first embedded sleeve (5) through a first connecting bolt (10), and an internal thread matched with the first connecting bolt (10) is arranged in the first embedded sleeve (5);
the upper end of prestressing force diagonal member (3) is provided with second connection bent plate (11), the upper end at prestressing force diagonal member (3) is connected to a connecting plate welding of bent plate (11) is connected to the second, another connecting plate of bent plate (11) is connected to the second passes through second connecting bolt (12) and second embedded sleeve (7) fastening connection, set up in second embedded sleeve (7) with second connecting bolt (12) matched with internal thread.
7. The construction method of the spatial dislocation overhanging terrace of the building according to claim 1, characterized in that: the horizontal floor sweeping rod with the terrace construction formwork is provided with a zigzag inclined strut (4), and the zigzag inclined strut (4) is arranged along the length direction of the horizontal floor sweeping rod.
8. The construction method of the spatial dislocation overhanging terrace of the building according to claim 1, characterized in that: and step six, after each complete dislocation terrace unit section is constructed in sequence, repeating the step 202 for K times when cantilever terraces of K floors still exist on the top of the building main body and are not constructed, wherein K is a positive integer and is less than N, and completing construction of cantilever terraces of the rest floors.
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| CN111021614A (en) * | 2019-12-19 | 2020-04-17 | 中国建筑第八工程局有限公司 | Multi-layer large-span prestressed system and frame body quick-dismantling construction method thereof |
| CN111395725B (en) * | 2020-04-22 | 2021-07-09 | 中建八局第二建设有限公司 | Construction method of scaffold with irregular convex-concave facade structure |
| CN111749456B (en) * | 2020-07-16 | 2021-11-12 | 江苏省江建集团有限公司 | Synchronous construction method for cantilever structure and tower body main body of lookout tower |
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