CN114775806B - Wall body and upper concrete structure construction platform utilizing jacking net rack and method thereof - Google Patents
Wall body and upper concrete structure construction platform utilizing jacking net rack and method thereof Download PDFInfo
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- CN114775806B CN114775806B CN202210613703.6A CN202210613703A CN114775806B CN 114775806 B CN114775806 B CN 114775806B CN 202210613703 A CN202210613703 A CN 202210613703A CN 114775806 B CN114775806 B CN 114775806B
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- 238000010276 construction Methods 0.000 title claims abstract description 105
- 239000004567 concrete Substances 0.000 title claims abstract description 80
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- 230000007246 mechanism Effects 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 18
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- 230000001680 brushing effect Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 4
- 238000009415 formwork Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000009435 building construction Methods 0.000 abstract description 3
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- 238000004904 shortening Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 6
- 230000001174 ascending effect Effects 0.000 description 4
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B1/3511—Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
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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
- E04G1/00—Scaffolds primarily resting on the ground
- E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
- E04G1/152—Platforms made of metal or with metal-supporting frame
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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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
- E04G5/003—Devices for storing material on the scaffold
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B2001/3588—Extraordinary methods of construction, e.g. lift-slab, jack-block using special lifting or handling devices, e.g. gantries, overhead conveying rails
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses a wall body and an upper concrete structure construction platform utilizing a jacking net rack and a method thereof, and belongs to the field of building construction. The construction platform is provided with the hydraulic jacking equipment special for the lower part and the grid structure for bearing serving as the construction operation platform, the construction template is paved, an integral jacking and supporting mode is adopted, jacking construction materials and operators perform wall masonry operation in the step-up process, and after the construction materials and operators reach the designed elevation, the construction platform is converted into a high-support formwork for pouring heavy roof panels, and the construction platform can be used as a wall painting and roof hanging member to install a scaffold in the descending process. The invention can enlarge the working face in the construction process, reduce the cost of safety measures for high-altitude operation, avoid the situation of building a time-consuming and labor-consuming full-house scaffold and repeatedly building different types of scaffolds, and has the advantages of shortening the construction period, ensuring the quality, ensuring the safety, reducing the engineering cost and improving the economic benefit.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a wall body and upper concrete structure construction platform utilizing a jacking net rack and a method thereof.
Background
In partial buildings (such as granary), the construction method has the characteristics that the wall is thicker, the roof is a door type heavy concrete structure with a flat layer for overhauling and equipment gallery floor interlayer, and the post-construction components or processes such as a hanger and stairs are arranged below the roof, and the conventional construction method is as follows: after the terrace construction is completed, building a double-row outer wall scaffold to perform wall surface masonry and pre-buried pipeline construction (scaffold eyes cannot be left on the walls of technological requirements, and when the roof is higher, the scaffold needs to be widened to ensure stability); after the construction is completed, setting up a full-framing scaffold in the building, and carrying out the repeated formwork construction of the concrete heavy roof; after the roof is finished, gradually dismantling the scaffold with full red, so as to construct hanging/overhanging equipment such as internal stairs; and finally, building a double-row inner frame of the wall surface again to carry out wall surface coating construction. The scaffold is assembled and disassembled for multiple times, so that the defects of high cost, long period, low efficiency, large scaffold erection and use safety risks and the like exist.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a construction platform for a wall body and an upper concrete structure by using a jacking net rack and a method thereof.
The specific technical scheme adopted by the invention is as follows:
In a first aspect, the invention provides a wall body and upper concrete structure construction platform utilizing a jacking grid, which comprises a grid platform and a plurality of climbing frame type jacking mechanisms distributed below the grid platform;
a plane template which is used as a stacking surface of a masonry material and a concrete floor slab pouring bottom die is paved on the top surface of the grid frame platform;
The climbing frame type jacking mechanism comprises a jacking bracket, a jacking cross beam and a jacking device, wherein the jacking cross beam and the jacking device are installed in the jacking bracket; the plurality of jacking brackets can be vertically assembled section by section in a section mode; the jacking device comprises an upper jacking seat, a lower jacking seat and hydraulic jacking equipment; the upper jacking seat is arranged on a displacement output end at the top of the hydraulic jacking equipment, and is driven to lift by the displacement output end; the lower jacking seat is arranged at the bottom of the hydraulic jacking equipment and moves up and down synchronously along with the hydraulic jacking equipment; one lifting stroke of the hydraulic lifting device is larger than the height of the lifting bracket; the upper part of each jacking bracket is provided with a shelving beam, and the upper jacking seat can be supported on the shelving beam to form a vertical bearing force; the jacking cross beam can be horizontally erected on a rest cross beam at the upper part of the jacking bracket in a detachable mode, and a bearing support is provided for the lower jacking seat; when the jacking cross beam does not exist in the jacking bracket, the lower jacking seat can freely pass through the whole jacking bracket to lift up and down;
The net rack platform is fixedly connected with each climbing frame type jacking mechanism through the lifting base, and the whole net rack platform is synchronously controlled to lift by hydraulic lifting equipment in each climbing frame type jacking mechanism.
As a preference of the first aspect, the hydraulic jacking device includes a jack installed in a jacking bracket and an oil pump connected to the jack through an oil pipe; all oil pumps in the climbing frame type jacking mechanism are uniformly controlled by a control box.
Preferably, in the first aspect, the lifting seat is provided with a lifting rod, and the top of the lifting rod is detachably connected and fixed with the bolt ball of the grid platform.
Preferably, in the first aspect, the bolt ball connected and fixed with the lifting rod is a pitch point of a pitch ball of the grid frame platform. Of course, the jacking mechanism can also be fixed by adopting a lower chord ball joint when limited by the space of the web members of the net rack.
As a preferable aspect of the above first aspect, a plurality of parallel main purlines are fixed on a plurality of upper chord ball nodes of the grid platform through lugs, a plurality of times of purlines are vertically fixed on each main purline to form a supporting surface, and the plane template is horizontally erected on the supporting surface through a batten at the bottom.
As a preferable aspect of the first aspect, the main purline is connected and fixed with the fixed angle steel welded on the bracket through a split bolt, and the secondary purline is connected and fixed with the fixed angle steel welded on the top of the main purline through a split bolt.
In a second aspect, the present invention provides a construction method for a middle wall and an upper concrete structure of a building using the construction platform according to any one of the first aspect, for constructing a building in which a concrete floor slab is disposed on an upper portion and a concrete roof is erected on the concrete floor slab through a concrete girder, comprising the steps of:
S1, in a construction area inside an outer wall of a building, designing and checking a grid frame platform and a supporting point, arranging a plurality of positioning points for lifting the grid frame platform according to a design result, installing a section of lifting support at each positioning point, installing a lifting device in the lifting support, leveling a lower lifting seat of the lifting device and the bottom of the lifting support, and then supporting the lower lifting seat and the bottom of the lifting support on the ground;
s2, assembling the grid frame platform by taking all jacking devices arranged in a construction area as references, connecting and fixing the grid frame platform and each climbing frame type jacking mechanism through the jacking seats, and horizontally paving the plane templates at the top of the grid frame platform to form a construction platform;
s3, paving isolation cloth on the top surface of the plane template, and stacking a masonry material for building a wall body on the isolation cloth; synchronously performing a test jacking test on the grid frame platforms stacked with the masonry materials through hydraulic jacking equipment in all the climbing frame type jacking mechanisms, and returning the hydraulic jacking equipment after confirming that the construction platforms meet the operation requirements;
S4, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms to jack up the net rack platform, enabling the net rack platform to stably ascend for one jacking stroke and then to be static, enabling the height between a jacking seat in each climbing frame type jacking mechanism and a jacking bracket below the jacking seat to be not smaller than the height of one section of jacking bracket, installing a second section of jacking bracket on the first section of jacking bracket, and controlling the jacking seat to descend through the hydraulic jacking equipment so that the bottom of the jacking seat is just supported on the rest cross beam to form vertical bearing force;
S5, taking the lifting seats supported on the shelving beams as force points, synchronously contracting through controlling hydraulic lifting equipment in all climbing frame type lifting mechanisms, driving the respective lower lifting seats to lift at least one section of lifting support, and erecting the lifting beams on the nearest shelving beams below the lower lifting seats, so that the lower lifting seats are supported on the lifting beams to form vertical bearing force; then, taking the grid frame platform as a masonry and operation platform, and carrying out wall masonry operation within a configurable height range by using masonry materials;
s6, repeating the steps S4 and S5, and building the next section of height of the building wall by utilizing the further raised grid frame platform;
S7, continuously repeating the step S6 until the net rack platform reaches an elevation position capable of meeting the construction of the last section of wall, wherein hydraulic jacking equipment in all climbing frame type jacking mechanisms is not contracted any more, temporary shelving pieces are erected between each lifting seat and the rest beam nearest below, and the lifting seats are supported on the rest beam through the temporary shelving pieces to form vertical bearing force; then the net rack platform is used as a masonry and operation platform, and masonry operation of the last section of wall body is completed by using masonry materials, so that the wall body reaches the design elevation;
s8, after the wall is built, removing the isolation cloth on the plane template, cleaning the top surface of the plane template, and then brushing a release agent and plugging gaps to convert the grid frame platform into a high-support die frame for pouring the concrete floor slab; binding steel bars of a concrete floor slab and a concrete girder on the plane template, pouring concrete and curing to form the concrete floor slab, erecting a pouring template of the concrete girder and a concrete roof on the concrete floor slab, pouring concrete and curing to form the concrete girder and the concrete roof;
S9, after curing of the concrete girder and the concrete roof is completed, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms to slightly jack the building structure above the grid frame platform, and sequentially removing the temporary shelving part and the uppermost section of jacking bracket;
s10, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms to shrink, so that the grid frame platform is separated from the building structure above until the bottoms of all the climbing frame type jacking seats are just supported on the rest cross beam to form vertical bearing force; then, taking the lifting seat supported on the rest cross beam as a force point, controlling each hydraulic lifting device to continuously shrink, driving each lower lifting seat to lift so as to separate from the lifting cross beam below, and removing and reinstalling the lifting cross beam on the rest cross beam of the next section of lifting bracket;
S11, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms to synchronously output extension displacement, and further driving respective lower jacking seats to be positioned on jacking cross beams supported in the next section of jacking support; then controlling the hydraulic jacking equipment in all the climbing frame type jacking mechanisms to synchronously and continuously output elongation displacement, and dismantling the uppermost section of jacking bracket after the respective jacking seats are separated from the uppermost jacking bracket;
s12, continuously repeating the steps S10 and S11, removing the jacking brackets section by section from top to bottom, gradually lowering the grid platform, and brushing or installing different heights according to design requirements in the lowering process of the grid platform;
And S13, when the net rack platform descends to be close to the ground and only the last section of jacking support is left, supporting the lower jacking seat at the bottom of the hydraulic jacking equipment in all the climbing frame jacking mechanisms on the ground, jacking the jacking seat to separate from the jacking support, and then sequentially removing the plane template, the net rack platform, the jacking support and the jacking device to finish construction.
As a preferable mode of the second aspect, the wall surface and the bottom surface of the concrete floor slab are painted and decorated according to design requirements during the descending process of the grid platform, and the roof hanging and overhanging components are installed at the same time.
As a preferable aspect of the second aspect, in the process of lifting the grid platform, when the total height of the vertically assembled jacking bracket is higher than a set value, a throwing support or a cable rope is required to be arranged.
Preferably, in the second aspect, when the rack platform and the climbing frame type lifting mechanism (ii) are disassembled, each assembly is transported to a next construction site for reuse.
Compared with the prior art, the invention has the following beneficial effects:
1) The invention adopts the grid structure platform designed in advance and the selected jacking equipment, so that the single size is smaller, and the transportation is convenient; after the installation is finished, the lifting and positioning and the subsequent falling of the frame can be realized by manual operation; the disassembly and the jacking processes are simple, and common workers can complete the actions through simple training;
2) The invention adopts a multi-purpose platform with large operation surface and strong safety protection, can be sequentially used as an operation platform for stacking, masonry and coating, and can be used as a high-count die carrier of a heavy roof, so that the operation surface can be enlarged in the construction process, the cost of safety measures for high-altitude operation is reduced, the conditions of building a full-red scaffold which takes time and labor and repeatedly building different types of scaffolds are avoided, and the smooth implementation and economic and safe operation of projects are ensured;
3) The bolt net rack platform, the jacking jack, the hydraulic pump station equipment and other auxiliary subsystems adopted by the invention are all mature products, are easy to produce and convenient to maintain and replace, and can ensure the integral synchronism of the operation platform during jacking through the control box. The whole equipment and the platform device have reliable structure, convenient maintenance and low manufacturing cost.
4) The construction platform adopted by the invention can be used singly or in groups according to engineering conditions, and the method has the advantages of flexible mode of selection, wide applicability, simple adjustment, good synchronism, simple connection, convenient disassembly and assembly and convenient remote movement and repeated use.
Drawings
FIG. 1 is a schematic view of a wall and upper concrete structure construction platform utilizing a jacking grid;
FIG. 2 is a schematic view of a frame climbing mechanism;
FIG. 3 is a schematic diagram of a grid platform structure;
FIG. 4 is a schematic diagram of the principle of operation of the climbing frame type jack-up mechanism;
FIG. 5 is a plan view of an exemplary in-building construction area;
FIG. 6 is a schematic view showing the 1 st state of the construction method according to the embodiment of the present invention;
FIG. 7 is a schematic view showing the 2 nd state of the construction method according to the embodiment of the present invention;
FIG. 8 is a schematic view showing the 3 rd state of the construction method according to the embodiment of the present invention;
FIG. 9 is a view showing the 4 th state of the construction method according to the embodiment of the present invention;
FIG. 10 is a schematic view showing a 5 th state of the construction method according to the embodiment of the present invention;
FIG. 11 is a schematic view showing a 6 th state of the construction method according to the embodiment of the present invention;
FIG. 12 is a schematic view showing a 7 th state of the construction method according to the embodiment of the present invention;
FIG. 13 is a schematic view showing an 8 th state of the construction method according to the embodiment of the present invention;
FIG. 14 is a 9 th state diagram of the construction method according to the embodiment of the present invention;
FIG. 15 is a schematic view showing a 10 th state of the construction method according to the embodiment of the present invention;
FIG. 16 is a schematic view showing the 11 th state of the construction method according to the embodiment of the present invention;
FIG. 17 is a view showing the 12 th state of the construction method according to the embodiment of the present invention;
FIG. 18 is a schematic view showing the 13 th state of the construction method according to the embodiment of the present invention;
FIG. 19 is a view showing the 14 th state of the construction method according to the embodiment of the present invention;
FIG. 20 is a schematic view showing a 15 th state of the construction method according to the embodiment of the present invention;
FIG. 21 is a schematic view showing the 16 th state of the construction method according to the embodiment of the present invention;
the reference numerals in the drawings are: the net rack platform I, the climbing frame type lifting mechanism II, the positioning point C, the upper lifting seat 1, the lower lifting seat 2, the lifting support 3, the jack 4, the shelving crossbeam 5, the connecting crossbeam 6, the lifting rod 7, the lifting crossbeam 8, the oil pump 9, the oil pipe 10, the control box 11, the base 12, the bolt ball 13, the bracket 14, the fixed angle steel 15, the main purline 16, the secondary purline 17, the batten 18, the plane template 19, the masonry material 20, the cable 21, the concrete floor 22, the equipment gallery floor 23, the roof template support frame 24, the concrete girder 25 and the concrete roof 26.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
In the description of the present invention, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected with intervening elements present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
In the description of the present invention, it should be understood that the terms "first" and "second" are used solely for the purpose of distinguishing between the descriptions and not necessarily for the purpose of indicating or implying a relative importance or implicitly indicating the number of features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
As shown in fig. 1, in a preferred embodiment of the present invention, a wall and upper concrete structure construction platform using a jacking grid is provided, which includes a grid platform i and a plurality of climbing frame type jacking mechanisms ii distributed below the grid platform i. The specific structure and implementation form of the grid platform I and the climbing frame type lifting mechanism II are described in detail below.
The grid frame platform I is used as an operation platform for stacking, masonry and coating, and is also used as a high-support formwork for pouring concrete structures above the building. The grid frame platform I in this embodiment can adopt a bolt net frame platform, and a plane template 19 which is used as a stacking surface of the masonry material 20 and a pouring bottom die of the concrete floor slab 22 is paved on the top surface of the grid frame platform I.
And each climbing frame type jacking mechanism II is used for providing lifting power for the grid frame platform I, and meanwhile, the whole climbing frame type jacking mechanism needs to meet the height adjustment requirements required by different height operations. Thus, as shown in fig. 2, in the present embodiment, the climbing frame type jacking mechanism ii includes the jacking bracket 3, and the jacking cross member 8 and the jacking device mounted in the jacking bracket 3. The plurality of jacking brackets 3 can be vertically assembled section by section in a section mode. All jacking brackets 3 have the same structural and dimensional parameters so as to facilitate assembly and reuse. Each section of jacking bracket 3 is vertically supported by 4 upright posts, and the 4 upright posts are connected into a whole through a connecting beam 6. The top and the bottom of 4 stands can all set up the connection end plate for carry out bolted connection with other jacking support 3.
The jacking device comprises an upper jacking seat 1, a lower jacking seat 2 and hydraulic jacking equipment. The upper jacking seat 1 is arranged on a displacement output end at the top of the hydraulic jacking equipment, and is driven to lift by the displacement output end. The lower jacking seat 2 is arranged at the bottom of the hydraulic jacking equipment and synchronously moves up and down along with the hydraulic jacking equipment. One jacking travel of the hydraulic jacking equipment is larger than the height of the jacking bracket 3, so that the matching relationship between the jacking seat 1 and the previous section of jacking bracket 3 is changed through output displacement. In each lifting bracket 3, a rest beam 5 is arranged at the upper part of the lifting bracket except for a connecting beam 6. The rest cross beam 5 is used for bearing, so that the steel with higher strength is needed, the contact cross beam 6 is not needed for bearing, and the strength can be not needed to be excessively high. The upper jacking seat 1 can be supported on the rest cross beam 5 to form a vertical bearing force. The jacking cross beam 8 can be horizontally erected on the shelving cross beam 5 at the upper part of the jacking bracket 3 in a detachable mode, and provides bearing support for the lower jacking seat 2. When the jacking cross beam 8 does not exist in the jacking bracket 3, the lower jacking seat 2 can freely pass through the whole jacking bracket 3 to lift up and down.
In order to ensure the stability of the support, two shelving beams 5 and jacking beams 8 are required to be arranged in parallel.
The net rack platform I is fixedly connected with each climbing frame type jacking mechanism II through the jacking seat 1, and the whole net rack platform I is synchronously controlled to lift by hydraulic jacking equipment in each climbing frame type jacking mechanism II.
It should be noted that the hydraulic lifting device in the lifting device may take any realizable form. In this embodiment, because the whole rack platform I needs to be lifted by the synchronous control of the hydraulic jacking equipment in each climbing frame type jacking mechanism II, the hydraulic jacking equipment needs to keep higher coordination consistency during working, and the instability of the rack platform I is avoided. Thus, as shown in fig. 2, the hydraulic jacking apparatus in the present embodiment includes a jack 4 installed in a jacking bracket 3 and an oil pump 9 connected to the jack 4 through an oil pipe 10; the oil pumps 9 in all the climbing frame type jacking mechanisms II are uniformly controlled by the control box 11. The control box 11 may perform a control operation by wired or wireless means.
In the invention, in order to construct at different heights, the height of the grid platform I needs to be adjusted by assembling the jacking brackets 3, and the jacking device can climb up and down in the jacking brackets 3 assembled section by section. As shown in fig. 4, the working principle of the climbing frame type climbing mechanism ii in the present invention is shown: step 1, the bottom of the lower jacking seat 2 is propped against the jacking cross beam 8, the jacking cross beam 8 is erected on the rest cross beam 5 of the jacking bracket 3 below, the extension of the jack 4 is controlled and controlled firstly, and a distance is reserved between the jacking seat 1 and the uppermost jacking bracket 3 along with the lifting; step 2, continuously installing a section of upright post of the jacking bracket 3 above; step 3, installing a rest cross beam 5 and a contact cross beam 6 of the uppermost section of jacking bracket 3; step 4, controlling the control jack 4 to shrink, and descending the lifting seat 1 along with the control jack to enable the lifting seat to fall on the rest cross beam 5 of the uppermost section of lifting support 3 to form vertical bearing force; step 5, taking the lifting seat 1 as a fulcrum to control the jack 4 to shrink, and lifting the lower lifting seat 2 to enter the upper section of lifting support 3; step 6, two jacking cross beams 8 are erected on the shelving cross beam 5 below the lower jacking seat 2, and then the control jack 4 is controlled to extend, so that the lower jacking seat 2 just falls on the two jacking cross beams 8 to form vertical bearing force; and step 7, controlling the jack 4 to extend by taking the lower jacking seat 2 supported on the jacking cross beam 8 as a fulcrum, and continuing the next cycle.
It should be noted that, the connection form between the lifting seat 1 and the grid frame platform I can be adjusted according to the actual situation, so as to meet the strength of the connection node and the convenience of installation and disassembly. In the embodiment, the lifting seat 1 is provided with a lifting rod 7, and the top of the lifting rod 7 is detachably connected and fixed with a bolt ball 13 end bearing of the net rack platform I to form a lifting point. In general, the jacking point considers the assembly height of the net rack, and the bolt ball 13 connected and fixed with the jacking rod 7 can be an upper chord ball node of the net rack platform I. However, in other embodiments, the lower chord may be used as the lifting point.
It should be noted that the specific form of the grid platform i may be varied, and in this embodiment, a bolted net frame platform is preferably used. As shown in fig. 3, main purlines 16 are fixed on a plurality of upper chord ball nodes of the grid platform i through lugs 14, a main purline 16 is fixed on each upper chord ball node, and the main purlines 16 are parallel to each other. Further, a series of secondary purlines 17 may be further vertically fixed to each primary purline 16 below the installation area of the entire planar form 19 to form a supporting surface, and the secondary purlines 17 are parallel to each other, and the planar form 19 is horizontally erected on the supporting surface through the battens 18 at the bottom. In this embodiment, the support 14 and the main purline 16 may be welded with fixing angle 15 for connection respectively, the main purline 16 may be connected and fixed with the fixing angle 15 welded on the support 14 through a split bolt, and the sub purline 17 is connected and fixed with the fixing angle welded on the top of the main purline 16 through a split bolt. Bolt holes can be formed in the fixed angle steel 15, and the fixed angle steel is detachably fixed through the split bolts.
The construction platform is provided with the hydraulic jacking equipment special for the lower part and the grid structure for bearing serving as the construction operation platform, the construction template is paved, an integral jacking and supporting mode is adopted, jacking construction materials and operators perform wall masonry operation in the step-up process, and the construction platform is converted into a high-support formwork for pouring heavy roof panels after reaching a designed elevation, and can be used as a construction method for wall painting and roof hanging members to install scaffolds in the step-down process. Each climbing frame type jacking mechanism and net rack platform in the construction platform comprise: jacking support, built-in jack, computer controlled synchronous pump station, bolt ball node net rack platform, construction template, etc. The high-strength concrete composite material can be sequentially used as an operation platform for stacking, masonry, coating, roof hanging and the like, and can be used as a high-support die carrier for heavy roofs. The invention can enlarge the working face in the construction process, reduce the cost of safety measures for high-altitude operation, avoid the situation of building a time-consuming and labor-consuming full-house scaffold and repeatedly building different types of scaffolds, and has the advantages of shortening the construction period, ensuring the quality, ensuring the safety, reducing the engineering cost and improving the economic benefit.
The invention further provides a construction method of a wall body and an upper concrete structure in a building based on the construction platform shown in the figure 1, and the construction method aims at the building specificity that: the upper part of the building is provided with a concrete floor slab 22 for placing equipment and overhauling channels, and a concrete roof 26 is erected on the concrete floor slab 22 through a concrete girder 25.
The construction method comprises the following specific steps:
S1, in a construction area inside a building outer wall, designing and checking calculation is carried out on a grid frame platform and a supporting point, a plurality of positioning points C for jacking the grid frame platform I are arranged according to a design result, a section of jacking support 3 is installed at each positioning point C, a jacking device is installed in the jacking support 3, and the bottoms of a lower jacking seat 2 of the jacking device and the bottoms of the jacking support 3 are leveled and then supported on the ground.
As shown in fig. 5, an exemplary building plan layout has an overall dimension of 30m long and 21 m wide, and in this embodiment, 8 positioning points C may be provided, and the positioning points C are divided into two rows of four, and are uniformly distributed in the entire construction area. After the installation of the jacking bracket 3 and the jacking device is completed, as shown in fig. 6.
S2, assembling the net rack platform I determined through design checking calculation by taking all jacking devices arranged in a construction area as references, connecting and fixing the net rack platform I and each climbing frame type jacking mechanism II through the jacking seat 1, horizontally paving the plane templates 19 on the top of the net rack platform I, and forming a construction platform, as shown in fig. 7. It should be noted that, the section of the wall body of building at the lowest can directly build on ground, need not with the help of rack platform I.
S3, paving isolation cloth on the top surface of the plane template 19, and stacking a masonry material 20 for building a wall body on the isolation cloth; the grid platform i on which the masonry material 20 is stacked is subjected to a simultaneous test jacking test by the hydraulic jacking devices in all the rack-climbing jacking mechanisms ii, as shown in fig. 8. After confirming that the construction platform meets the operation requirement, returning the hydraulic jacking equipment.
S4, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms II to jack up the grid frame platform I, enabling the grid frame platform I to stably ascend for one jacking stroke and then to be static, enabling the height between the jacking seat 1 in each climbing frame type jacking mechanism II and the jacking support 3 below to be not smaller than the height of one section of jacking support 3, installing a second section of jacking support 3 on the first section of jacking support 3, and controlling the jacking seat 1 to descend through the hydraulic jacking equipment, so that the bottom of the jacking seat 1 is just supported on the shelving cross beam 5 to form vertical bearing force, as shown in FIG. 9.
S5, taking the lifting seat 1 supported on the rest cross beam 5 as an acting point, synchronously contracting through controlling hydraulic lifting equipment in all the climbing frame type lifting mechanisms II, driving the respective lower lifting seats 2 to lift at least one section of lifting support 3, and erecting a lifting cross beam 8 on the rest cross beam 5 nearest below the lower lifting seat 2, so that the lower lifting seats 2 are supported on the lifting cross beam 8 to form a vertical bearing force; then, the grid frame platform I is used as a masonry and operation platform, and the masonry material 20 is used for wall masonry operation within a construction height range, as shown in fig. 10.
S6, repeating S4 and S5, and building the next section of the building wall by utilizing the further raised grid platform I, as shown in fig. 11 and 12.
S7, continuously repeating the step S6 until the net rack platform I reaches an elevation position capable of meeting the construction of the last section of wall, wherein the hydraulic jacking equipment in all climbing frame type jacking mechanisms II is not contracted, temporary shelving members are erected between each lifting seat 1 and the rest cross beam 5 nearest below, and the lifting seats 1 are supported on the rest cross beam 5 through the temporary shelving members to form vertical bearing force; and then the net rack platform I is used as a masonry and operation platform, and the masonry material 20 is used for completing the masonry operation of the last section of wall body, so that the wall body reaches the design elevation, as shown in fig. 13 and 14.
S8, after the wall is built, removing the isolation cloth on the plane template 19, cleaning the top surface of the plane template 19, and then brushing a release agent and plugging gaps to convert the grid platform I into a high-support die carrier for pouring the concrete floor slab 22; binding steel bars of the concrete floor slab 22 and the concrete girder 25 on the plane formwork 19, pouring concrete and curing to form the concrete floor slab 22, erecting pouring templates of the concrete girder 25 and the concrete roof 26 on the concrete floor slab 22, and finally pouring concrete and curing to form the concrete girder 25 and the concrete roof 26, as shown in fig. 15. The equipment corridor floor 23 can be constructed on the concrete floor 22. In actual construction, the pouring formwork of the concrete roof 26 needs to be supported by erecting the roof formwork support frame 24, and the construction is completed and removed.
And S9, after curing the concrete girder 25 and the concrete roof 26, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms II to slightly jack the building structure above the grid frame platform I, and sequentially removing the temporary rest and the uppermost section of jacking bracket 3, as shown in fig. 16.
S10, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms II to shrink, so that the grid frame platform I is separated from the building structure above until the bottoms of all the lifting seats 1 are just supported on the rest cross beam 5 to form vertical bearing force; and then the lifting seat 1 supported on the rest cross beam 5 is taken as a contact point, each hydraulic lifting device is controlled to continuously shrink, the lower lifting seat 2 is driven to lift so as to be separated from the lifting cross beam 8 below, and the lifting cross beam 8 is removed and reinstalled on the rest cross beam 5 of the next section of lifting support 3, as shown in figure 17.
S11, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms II to synchronously output elongation displacement, and further driving respective lower jacking seats 2 to be located on jacking cross beams 8 in the next section of jacking bracket 3; and then controlling the hydraulic jacking equipment in all the climbing frame type jacking mechanisms II to synchronously and continuously output elongation displacement, and dismantling the uppermost section of jacking bracket 3 after the respective jacking seats 1 are separated from the uppermost jacking bracket 3, as shown in fig. 18.
S12, continuously repeating S10 and S11, removing the jacking bracket 3 section by section from top to bottom, gradually descending the grid platform I, and brushing or installing different heights according to design requirements in the descending process of the grid platform I, as shown in FIG. 19.
And S13, when the net rack platform I descends to be close to the ground and only the last section of jacking support 3 is left, supporting the lower jacking seat 2 at the bottom of the hydraulic jacking equipment in all the climbing frame type jacking mechanisms II on the ground, jacking the upper jacking seat 1 to separate from the jacking support 3, and then dismantling the plane template 19, the net rack platform I, the jacking support 3 and the jacking device in sequence, as shown in fig. 20. Finally, the site is cleaned, and after the construction is completed, the site is shown in fig. 21.
It should be noted that the specific painting or installation operation to be performed during the descent of the grid platform i is dependent on the architectural design and construction requirements. In this embodiment, the wall surface and the bottom surface of the concrete floor slab 22 can be painted and decorated according to the design requirements, and the roof hanging and overhanging components including stairs and high-altitude platform channels to be railing are installed at the same time.
It should be noted that, in the ascending process of the grid platform i, when the total height of the vertically assembled jacking bracket 3 is higher than the set value, a throwing support or a cable rope 21 is required to be arranged to prevent instability and rollover.
Finally, when the grid platform I and the climbing frame type lifting mechanism II are all disassembled, each component can be transported to the next construction site for reuse.
The construction method only shows a principle framework, but in practical application, construction details need to be optimized and adjusted by combining specific construction organization sequences. For further ease of understanding, a specific implementation of this construction method is shown below by way of example.
In this embodiment, the pre-construction technique is prepared as follows:
1. According to the maximum counterforce result calculated by simulation analysis of the construction process, considering the related safety increase coefficient according to the specification, and selecting the type of jacking equipment;
2. Designing a grid frame platform in advance according to the range, weight and load condition of the construction structure, determining the grid size, section size, height and the like, and processing and manufacturing in a professional manufacturer;
The formal construction process is as follows:
The first step:
1. The ground spring line is positioned, installed and leveled with the jacking equipment and the first grid jacking supporting frame;
and a second step of:
1. installing a net rack working platform for jacking, upper purlines and templates by taking a preset jacking point as a reference, and simultaneously manually building the bottommost wall;
2. the jacking point is preferentially arranged at the upper chord ball node of the grid structure, and the length of the jacking rod is determined and adjusted through calculation in advance when the jacking device is implemented on site so as to prevent the jacking device from colliding with the web members of the grid structure;
3. the assembling requirement of the net rack platform is as follows: the deviation of the longitudinal length and the transverse length is less than or equal to (+ -L/2000, +/-30 mm), the center deviation of the jacking ball joint is less than or equal to (L/3000, 30 mm), and the height difference of adjacent jacking points is less than or equal to (L/400, 15 mm);
And a third step of:
1. checking the installation quality of the grid frame platform, paving isolating cloth on the template after the grid frame platform is qualified for acceptance, and uniformly stacking the wall material to be built;
2. The net rack platform is lifted for 12 hours, and whether the supporting points, the lifting equipment, the net rack deformation, the ground foundation and the like have problems or not is checked;
3. when the net rack platform is lifted, the operating stroke of the jack cylinder is 200mm, and the distance between the lower chord of the platform and the ground is not more than 500mm;
Fourth step:
1. starting a hydraulic pump station to enable a hydraulic jack lifting piston to drive a net rack to lift for one stroke and then to be static;
2. A second section of jacking bracket is installed by utilizing the matching of a small winch or a manual hoist, and bolts are screwed down to check the fastening and horizontal conditions;
3. Slowly contracting the oil cylinder, and descending for about 150 strokes to enable the lifting seat to fall on the rest cross beam of the second section of support;
4. checking the operation data of the oil cylinder and the verticality and the horizontal condition of the support frame again;
Fifth step:
1. taking an ascending base supported on the beam of the second section of jacking frame as a stress point, driving the lower jacking base to ascend for one stroke by a shrinkage cylinder, and arranging a lower two jacking beams between the lower jacking base of each cylinder and the first jacking frame shelving beam after the shrinkage cylinder is in place;
2. and (5) checking the situation of the position of the jacking cross beam, the perpendicularity of each jacking frame and the levelness of the whole grid frame platform. The laying width of the jacking cross beam is required to be more than 50mm, the perpendicularity of the jacking frame is less than or equal to (H/1000, 10 mm), and the height difference of adjacent jacking points is less than or equal to (L/400, 15 mm);
3. Taking the lifted net rack platform as a masonry and operation platform to perform manual masonry operation of the wall body;
Sixth step:
1. Repeating the steps 4-5, replacing the rest cross beam and adding a jacking bracket through a telescopic jack cylinder, continuously jacking the grid frame platform, and simultaneously manually building the wall body;
seventh step:
1. Repeating the step 6, continuously lifting the grid frame platform until reaching a preset elevation, and simultaneously manually building the wall body;
2. When the supporting frame is higher, a throwing support or a cable rope can be arranged as appropriate;
3. After the net rack construction platform is lifted to the top, the lifting jack is not contracted any more, and a temporary shelving piece is additionally arranged between the lifting seat and the lifting bracket shelving beam so as to facilitate the later dismantling and unloading.
Eighth step:
1. After the wall is built, removing the isolation cloth, cleaning the upper template of the net rack, brushing a release agent, and converting the platform into a high-count die carrier;
2. Plugging the peripheral gaps of the platform, and binding floor and girder steel bars;
3. pouring floor concrete;
4. After the maintenance of the floor is completed and the concrete reaches a certain strength, erecting girder and roof boarding templates on the floor, and pouring girder and roof boarding concrete;
Ninth step:
1. After the maintenance period of the roof arrives, starting a hydraulic pump station, controlling a hydraulic jack to jack the roof slightly, and removing a temporary shelving part; plugging the peripheral gaps of the platform, and binding floor and girder steel bars;
2. The hydraulic jack supporting seat is kept still, and after the first section of jack supporting frame tie rod is removed, the first section of jack supporting frame is removed;
Tenth step:
1. The cylinder body of the hydraulic jack is controlled to descend, the steel structure net rack is separated from the roof, and then slowly falls down, so that the jack-up seat is located on the rest beam of the jack-up rack of the next section;
2. After the verticality and the like are checked in the falling position, the jack cylinder is controlled to shrink to drive the lower lifting seat to separate from the lower lifting cross beam;
3. Manually dismantling the lifting cross beam of the lower lifting seat by using the assistance of a hoist chain, and replacing and installing the lifting cross beam on the rest cross beam of the next lifting frame;
Eleventh step:
1. the cylinder body of the hydraulic jack is controlled to descend, so that the lower lifting seat is placed on the lower placing cross beam;
2. after the lower jacking seat is checked to be placed without errors, the ascending travel of the oil cylinder is 50-100 mm, so that the upper jacking seat is separated from the jacking bracket;
3. Manually suspending and dismantling the top jacking bracket joint by using the assistance of a hoist chain;
Twelfth step:
1. Repeating the tenth to eleventh steps, and removing the jacking brackets section by controlling the lifting of the cylinder body of the hydraulic jack to enable the platform to descend section by section until the platform descends to the ground; after the lower jacking seat is checked to be placed without errors, the ascending travel of the oil cylinder is 50-100 mm, so that the upper jacking seat is separated from the jacking bracket;
2. in the process of descending the platform section by section, manually carrying out wall surface and roof surface fabric brushing operation and roof hanging and cantilever member construction;
3. after the cable rope descends to a certain height, the cable rope is removed.
Thirteenth step:
1. When the net rack is lowered to the ground, the template, the net rack platform, the jacking equipment and the bracket are removed in sequence;
Fourteenth step:
1. cleaning the site, and finishing the site to leave or transferring to the next unit site to assemble and construct again.
The above embodiment is only a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. For example, the jacking method of the invention adopts an upward jacking method that jacking equipment is positioned at the top of the bracket, and the jacking method that the jacking equipment is positioned at the root of the bracket can be adopted for construction. In addition, if multiple replacement construction is not considered, the structural mode of the grid frame platform can adopt structures such as a welded net frame or a space truss for operation besides a bolt net frame. The template of the working surface can be a wood pattern commonly used in civil engineering, and other materials such as a patterned steel plate can be adopted. Therefore, all the technical schemes obtained by adopting the equivalent substitution or equivalent transformation are within the protection scope of the invention.
Claims (9)
1. A construction method of a wall body and an upper concrete structure construction platform by using a jacking net frame is used for constructing a building with a concrete floor slab (22) at the upper part and a concrete roof (26) erected on the concrete floor slab (22) through a concrete girder (25),
The wall body of the jacking net rack and the upper concrete structure construction platform comprise a net rack platform (I) and a plurality of climbing frame type jacking mechanisms (II) distributed below the net rack platform (I); a plane template (19) which is used as a stacking surface of a masonry material (20) and a pouring bottom die of a concrete floor slab (22) is paved on the top surface of the grid platform (I); the climbing frame type jacking mechanism (II) comprises a jacking bracket (3), a jacking cross beam (8) and a jacking device, wherein the jacking cross beam (8) and the jacking device are arranged in the jacking bracket (3); the plurality of jacking brackets (3) can be vertically assembled section by section in a section mode; the jacking device comprises an upper jacking seat (1), a lower jacking seat (2) and hydraulic jacking equipment; the lifting seat (1) is arranged on a displacement output end at the top of the hydraulic lifting equipment, and is driven to lift by the displacement output end; the lower jacking seat (2) is arranged at the bottom of the hydraulic jacking equipment and moves up and down synchronously along with the hydraulic jacking equipment; one lifting stroke of the hydraulic lifting device is larger than the height of the lifting bracket (3); the upper part of each jacking bracket (3) is provided with a shelving beam (5), and the jacking seat (1) can be supported on the shelving beam (5) to form a vertical bearing force; the jacking cross beam (8) can be horizontally erected on the shelving cross beam (5) at the upper part of the jacking bracket (3) in a detachable mode, and a bearing support is provided for the lower jacking seat (2); when the jacking cross beam (8) does not exist in the jacking bracket (3), the lower jacking seat (2) can freely pass through the whole jacking bracket (3) to lift up and down; the net rack platform (I) is fixedly connected with each climbing frame type lifting mechanism (II) through the upper lifting seat (1), and the whole net rack platform (I) is synchronously controlled to lift by hydraulic lifting equipment in each climbing frame type lifting mechanism (II);
The concrete construction steps are as follows:
s1, in a construction area inside an outer wall of a building, arranging a plurality of positioning points (C) for jacking a grid platform (I) according to design results by designing and checking the grid platform and supporting points, installing a section of jacking bracket (3) at each positioning point (C), installing the jacking device in the jacking bracket (3), leveling the bottoms of a lower jacking seat (2) of the jacking device and the jacking bracket (3), and supporting the lower jacking seat on the ground;
S2, assembling the grid frame platform (I) by taking all jacking devices arranged in a construction area as references, connecting and fixing the grid frame platform (I) and each climbing frame type jacking mechanism (II) through the jacking seats (1), and horizontally paving the plane templates (19) on the top of the grid frame platform (I) to form a construction platform;
s3, paving isolation cloth on the top surface of the plane template (19), and stacking a masonry material (20) for building a wall on the isolation cloth; synchronously performing a test jacking test on the grid frame platform (I) stacked with the masonry material (20) through hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II), and returning the hydraulic jacking equipment after confirming that the construction platform meets the operation requirement;
S4, controlling hydraulic jacking equipment in all climbing frame jacking mechanisms (II) to jack up the grid frame platform (I), enabling the grid frame platform (I) to stably ascend for one jacking stroke and then to be static, enabling the height between a jacking seat (1) of each climbing frame jacking mechanism (II) and a jacking bracket (3) below to be not smaller than the height of one section of the jacking bracket (3), installing a second section of the jacking bracket (3) on the first section of the jacking bracket (3), and controlling the jacking seat (1) to descend through the hydraulic jacking equipment so that the bottom of the jacking seat (1) is just supported on the shelving cross beam (5) to form vertical bearing force;
s5, taking the lifting seats (1) supported on the shelving beams (5) as an acting point, synchronously contracting through controlling hydraulic lifting equipment in all climbing frame type lifting mechanisms (II), driving the respective lower lifting seats (2) to lift at least one section of lifting support (3) in height, and erecting lifting beams (8) on the nearest shelving beams (5) below the lower lifting seats (2), so that the lower lifting seats (2) are supported on the lifting beams (8) to form vertical bearing force; then, a grid frame platform (I) is used as a masonry and operation platform, and masonry materials (20) are used for wall masonry operation within a constructable height range;
S6, repeating the steps S4 and S5, and building the next section of height of the building wall by utilizing the further raised grid platform (I);
S7, continuously repeating the step S6 until the net rack platform (I) reaches an elevation position capable of meeting the construction of the last section of wall, wherein hydraulic jacking equipment in all climbing frame jacking mechanisms (II) is not contracted, temporary shelving pieces are erected between each lifting seat (1) and a shelving beam (5) nearest below, and the lifting seats (1) are supported on the shelving beam (5) through the temporary shelving pieces to form vertical bearing force; then the net rack platform (I) is used as a masonry and operation platform, and masonry operation of the last section of wall body is completed by using masonry materials (20), so that the wall body reaches the designed elevation;
S8, after the wall is built, removing the isolating cloth on the plane template (19), cleaning the top surface of the plane template (19), and then brushing a release agent and plugging gaps to convert the grid platform (I) into a high-count die carrier for pouring the concrete floor slab (22); binding steel bars of a concrete floor slab (22) and a concrete girder (25) on the plane template (19), then pouring concrete and curing to form the concrete floor slab (22), erecting pouring templates of the concrete girder (25) and a concrete roof (26) on the concrete floor slab (22), and finally pouring concrete and curing to form the concrete girder (25) and the concrete roof (26);
S9, after curing the concrete girder (25) and the concrete roof (26), controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms (II) to slightly jack the building structure above the grid frame platform (I), and sequentially dismantling the temporary shelving part and the uppermost section of jacking bracket (3);
S10, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms (II) to shrink, so that a grid frame platform (I) is separated from an upper building structure until the bottoms of all lifting seats (1) are just supported on the rest cross beam (5) to form vertical bearing force; then taking the lifting seat (1) supported on the rest cross beam (5) as a force point, controlling each hydraulic lifting device to continuously shrink, driving each lower lifting seat (2) to lift so as to separate from the lifting cross beam (8) below, and dismantling and reinstalling the lifting cross beam (8) on the rest cross beam (5) of the next section of lifting bracket (3);
S11, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms (II) to synchronously output elongation displacement, and further driving respective lower jacking seats (2) to fall on jacking cross beams (8) supported in the next section of jacking bracket (3); then controlling the hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) to synchronously and continuously output elongation displacement, and dismantling the uppermost section of jacking bracket (3) after the respective jacking seats (1) are separated from the uppermost jacking bracket (3);
S12, continuously repeating the steps S10 and S11, removing the jacking bracket (3) section by section from top to bottom, gradually descending the grid platform (I), and brushing or installing different heights according to design requirements in the descending process of the grid platform (I);
S13, when the net rack platform (I) descends to be close to the ground and only the last section of jacking support (3) is left, supporting the lower jacking seat (2) at the bottom of the hydraulic jacking equipment in all the climbing frame type jacking mechanism (II) on the ground, jacking the jacking seat (1) to separate from the jacking support (3), and then sequentially removing the plane template (19), the net rack platform (I), the jacking support (3) and the jacking device to finish construction.
2. A construction method according to claim 1, characterized in that the hydraulic jacking device comprises a jack (4) mounted in the jacking bracket (3) and an oil pump (9) connected to the jack (4) by means of an oil pipe (10); all oil pumps (9) in the climbing frame type jacking mechanism (II) are uniformly controlled by a control box (11).
3. The construction method according to claim 1, characterized in that the lifting base (1) is provided with a lifting rod (7), and the top of the lifting rod (7) is detachably connected and fixed with a bolt ball (13) of the net rack platform (i).
4. A construction method according to claim 3, characterized in that the bolt ball (13) connected and fixed to the lifting rod (7) is the upper chord ball node of the net rack platform (i).
5. The construction method according to claim 4, wherein a plurality of parallel main purlines (16) are fixed on a plurality of upper chord ball nodes of the grid frame platform (I) through lugs (14), a plurality of times of purlines (17) are vertically fixed on each main purline (16) to form a supporting surface, and the plane template (19) is horizontally erected on the supporting surface through a bottom batten (18).
6. The construction method according to claim 5, wherein the main purline (16) is fixedly connected with the fixed angle steel (15) welded on the support bracket (14) through a split bolt, and the secondary purline (17) is fixedly connected with the fixed angle steel welded on the top of the main purline (16) through a split bolt.
7. A method according to claim 1, wherein the wall and the floor (22) are painted and decorated according to design requirements during the lowering of the grid platform (i), and the roof hanging and overhanging elements are installed.
8. Construction method according to claim 1, characterized in that in the course of the ascent of the grid platform (i) when the total height of the vertically assembled jacking bracket (3) is higher than the set value, a throwing support or a guy rope (21) is provided.
9. The construction method according to claim 1, wherein when the rack platform (i) and the climbing frame type jacking mechanism (ii) are disassembled, each assembly is transported to a next construction site for reuse.
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| CN214575640U (en) * | 2020-12-09 | 2021-11-02 | 中建三局集团有限公司 | U-shaped synchronous construction formwork system for vertical and horizontal structures of cast concrete |
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