CN114775806A - Wall body utilizing jacking net rack, upper concrete structure construction platform and method thereof - Google Patents
Wall body utilizing jacking net rack, upper concrete structure construction platform and method thereof Download PDFInfo
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- CN114775806A CN114775806A CN202210613703.6A CN202210613703A CN114775806A CN 114775806 A CN114775806 A CN 114775806A CN 202210613703 A CN202210613703 A CN 202210613703A CN 114775806 A CN114775806 A CN 114775806A
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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
Abstract
The invention discloses a wall body utilizing a jacking net rack, a concrete structure construction platform on the upper part of the wall body 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, the bearing grid structure serving as the construction operation platform, the construction template is paved on the construction platform, the integral jacking and lifting mode is adopted, the jacking construction materials and operators perform wall masonry operation in the gradual rising process, the construction materials and the operators are converted into a high formwork support for pouring the heavy roof panel after the construction materials and the operators reach the designed elevation, and the construction platform can be used as a wall painting and roof hanging component mounting scaffold in the section falling process. The invention can enlarge the working area in the construction process, reduce the overhead operation safety measure cost, avoid the condition of building a full red scaffold which is time-consuming and labor-consuming 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 construction platform and a construction method for a wall body and an upper concrete structure by utilizing a jacking net rack.
Background
In some buildings (such as granaries), the building has the characteristics that the wall is thick, the roof is a door type heavy concrete structure with a flat layer overhaul and an equipment corridor floor interlayer, and a hanging rack, a stair and other post-construction components or processes are arranged below the roof, and the conventional construction method is as follows: after the terrace construction is finished, double rows of external wall scaffolds are erected for wall surface masonry and pipeline embedding construction (the process requires that scaffold holes cannot be reserved on the wall, and when the roof is high, the scaffolds need to be widened to ensure stability); after the construction is finished, erecting a full red scaffold inside the building, and carrying out the fractional formwork construction of the concrete heavy roof; after the roof is finished, gradually dismantling and lowering the full-hall red scaffold to carry out construction of hanging/overhanging equipment such as internal stairs and the like; and finally, erecting the double-row inner frame of the wall surface again to perform wall surface coating construction. Therefore, the defects of high cost, long period, low efficiency, high scaffold erection and use safety risk and the like exist when the scaffold is assembled and disassembled for multiple times.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a wall body utilizing a jacking net rack and an upper concrete structure construction platform and a method thereof.
The invention adopts the following specific technical scheme:
in a first aspect, the invention provides a wall body utilizing a jacking net rack and a construction platform of an upper concrete structure, which comprises a net rack platform and a plurality of climbing type jacking mechanisms distributed below the net rack platform;
a plane template which is also used as a masonry material stacking surface and a concrete floor slab pouring bottom die is laid on the top surface of the net rack 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 arranged in the jacking bracket; the plurality of jacking supports can be vertically assembled section by section; 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 with the hydraulic jacking equipment; one jacking stroke of the hydraulic jacking equipment is greater than the height of the jacking support; a placing cross beam is arranged at the upper part of each jacking support, and the upper jacking seat can be supported on the placing cross beam to form a vertical bearing force; the jacking cross beam can be horizontally erected on the placing cross beam at the upper part of the jacking support in a detachable mode to provide bearing support for the lower jacking seat; when the jacking support does not have a jacking cross beam, the lower jacking seat can freely penetrate through the whole jacking support to lift up and down;
the net rack platform is fixedly connected with each climbing frame type jacking mechanism through the upper jacking seat, and the whole net rack platform is synchronously controlled to lift by hydraulic jacking equipment in each climbing frame type jacking mechanism.
As a preference of the first aspect, the hydraulic jacking device comprises a jack installed in the jacking bracket and an oil pump connected with the jack through an oil pipe; and oil pumps in all the climbing frame type jacking mechanisms are uniformly controlled by the control box.
Preferably, the upper jacking seat is provided with a jacking rod, and the top of the jacking rod is detachably connected and fixed with the bolt ball of the grid frame platform.
In the first aspect, the bolt ball connected and fixed to the lifting rod is preferably an upper chord ball joint of the rack platform. Of course, the jacking mechanism can also be fixed by a lower chord ball joint when limited by the space of the net rack web members.
Preferably, a plurality of parallel main purlins are fixed on a plurality of upper chord ball nodes of the grid platform through brackets, a plurality of secondary purlins are vertically fixed on each main purlin to form a supporting surface, and the planar template is horizontally erected on the supporting surface through a batten at the bottom.
Preferably, in the first aspect, the primary purline is fixedly connected to a fixed angle steel welded to the bracket through a split bolt, and the secondary purline is fixedly connected to a fixed angle steel welded to the top of the primary purline through a split bolt.
In a second aspect, the present invention provides a method for constructing a wall and an upper concrete structure in a building by using the construction platform according to any one of the first aspect, which is used for constructing a building on which a concrete floor is arranged at an upper portion and a concrete roof is erected on the concrete floor by a concrete girder, and comprises the following steps:
s1, in a construction area inside an outer wall of a building, arranging a plurality of positioning points for jacking the net rack platform according to a design result by carrying out design checking on the net rack platform and the supporting points, installing a jacking support at each positioning point, installing a jacking device in each jacking support, and supporting the lower jacking seat of each jacking device and the bottom of each jacking support on the ground after leveling;
s2, assembling the net rack platform by taking all jacking devices arranged in a construction area as a reference, connecting and fixing the net rack platform and each climbing rack type jacking mechanism through the upper jacking seat, and horizontally paving the plane template on the top of the net rack platform to form a construction platform;
s3, laying an isolation cloth on the top surface of the plane template, and stacking a masonry material for building a wall on the isolation cloth; synchronously carrying out trial jacking tests on the net rack platform 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 platform meets the operation requirements;
s4, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms to jack the net rack platform, enabling the net rack platform to stably rise for a jacking stroke and then to be static, enabling the height between an upper jacking seat and a lower jacking support in each climbing frame type jacking mechanism to be not less than the height of a section of jacking support, then installing a second section of jacking support on a first section of jacking support, and controlling the upper jacking seat to descend through the hydraulic jacking equipment so that the bottom of the upper jacking seat is just supported on the shelving cross beam to form vertical bearing;
s5, taking the upper jacking seats supported on the resting beams as an acting point, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms to synchronously contract to drive the respective lower jacking seats to rise by the height of at least one section of jacking support, and then erecting jacking beams on the resting beams nearest below the lower jacking seats to support the lower jacking seats on the jacking beams to form vertical bearing force; then, the net rack platform is used as a building and operating platform, and building materials are used for building a wall within a construction height range;
s6, repeating S4 and S5, and building the next section of height of the building wall by utilizing the grid platform which is further lifted;
s7, repeating S6 continuously until the net rack platform reaches the elevation position capable of meeting the last section of wall construction, enabling hydraulic jacking equipment in all the climbing type jacking mechanisms not to shrink any more, and erecting temporary placement pieces between each upper jacking seat and the nearest placement cross beam below the upper jacking seat, so that the upper jacking seats are supported on the placement cross beams through the temporary placement pieces to form vertical bearing force; then, the net rack platform is used as a building and operating platform, and the building operation of the last section of wall body is completed by using building materials, so that the wall body reaches the designed elevation;
s8, after the wall is built, removing the isolation cloth on the plane template, cleaning the top surface of the plane template, painting a release agent and plugging gaps, so that the grid platform is converted into a high formwork support for pouring concrete floor slabs; binding the reinforcing steel bars of the concrete floor slab and the concrete girder on the plane template, then firstly pouring concrete and curing to form the concrete floor slab, then erecting a pouring template of the concrete girder and the concrete roof on the concrete floor slab, and finally pouring concrete and curing to form the concrete girder and the concrete roof;
s9, after the concrete girder and the concrete roof are maintained, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms to slightly jack up the building structure above the net rack platform, and then sequentially dismantling the temporary shelving members and the uppermost jacking bracket;
s10, controlling the hydraulic jacking equipment in all the climbing frame type jacking mechanisms to contract, so that the net rack platform is separated from the building structure above the net rack platform until the bottoms of the upper jacking seats are just supported on the placing cross beam to form vertical bearing force; then, taking the upper jacking seats supported on the resting cross beam as acting points, controlling each hydraulic jacking device to continuously contract, driving each lower jacking seat to ascend so as to be separated from the lower jacking cross beam, and detaching and reinstalling the jacking cross beam onto the resting cross beam of the next jacking support section;
s11, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms to synchronously output extension displacement, and further driving the respective lower jacking seats to be supported on jacking cross beams in the next jacking bracket; controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms to synchronously continue outputting the extension displacement, and detaching the uppermost jacking support after the upper jacking seat is separated from the uppermost jacking support;
s12, continuously repeating S10 and S11, detaching the jacking supports section by section from top to bottom, gradually descending the net rack platform, and brushing or installing the positions with different heights according to the design requirements in the descending process of the net rack platform;
s13, when the net rack platform descends to be close to the ground and only the last jacking support remains, enabling the lower jacking seats at the bottoms of the hydraulic jacking devices in all the climbing frame type jacking mechanisms to be supported on the ground, then jacking the upper jacking seats to enable the upper jacking seats to be separated from the jacking supports, and then sequentially detaching the plane template, the net rack platform, the jacking supports and the jacking devices to complete construction.
Preferably, in the second aspect, during the lowering process of the grid platform, the wall surface and the bottom surface of the concrete floor slab need to be coated with paint according to the design requirements, and meanwhile, a roof hanging and overhanging component is installed.
As a preferable mode of the second aspect, in the ascending process of the grid platform, when the total height of the vertically assembled jacking brackets is higher than a set value, a throwing support or a cable rope is required to be arranged.
As the second aspect of the optimization, after the net rack platform and the climbing frame type jacking mechanism (II) are all disassembled, all the components are transported to the next construction site for reuse.
Compared with the prior art, the invention has the following beneficial effects:
1) the invention adopts a grid structure platform designed in advance and selected jacking equipment, so that the single size is small, and the transportation is convenient; after the installation is finished, the lifting can be carried out in place and the subsequent frame falling can be carried out through manual operation; the dismounting and jacking processes are simple, and common workers can finish the actions through simple training;
2) the invention adopts a multi-purpose platform, has large operating surface and strong safety protection, can be used as an operating platform for stacking and building and coating in sequence, and can be used as a high-support formwork for a heavy roof, so that the operating surface can be enlarged in the construction process, the overhead operation safety measure cost is reduced, the situations of erecting full red scaffolds which wastes time and labor and repeatedly erecting different types of scaffolds are avoided, and the smooth implementation, economy and safety operation of a project are ensured;
3) the screw bolt ball net rack platform, the jacking jack, the hydraulic pump station equipment and other auxiliary subsystems adopted by the invention are 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 independently or in groups according to the requirements of engineering conditions, and the selection method is flexible, wide in applicability, simple in adjustment, good in synchronism, simple in connection, convenient in disassembly and assembly and convenient for moving in different places for repeated use.
Drawings
FIG. 1 is a schematic view of a construction platform for a wall and an upper concrete structure using a jacking net rack;
FIG. 2 is a schematic structural view of a climbing frame type jacking mechanism;
FIG. 3 is a schematic view of a rack platform structure;
FIG. 4 is a schematic view of an operation principle of the climbing frame type jacking mechanism;
FIG. 5 is a plan view of an exemplary construction area within a building;
FIG. 6 is a schematic view showing a state 1 of the construction method according to the embodiment of the present invention;
FIG. 7 is a schematic view showing a state of the construction method in the embodiment of the present invention at 2 nd;
FIG. 8 is a schematic view showing a state 3 of the construction method according to the embodiment of the present invention;
FIG. 9 is a schematic 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 a construction method according to an embodiment of the present invention;
FIG. 11 is a view schematically showing the 6 th state of the construction method according to the embodiment of the present invention;
FIG. 12 is a view schematically showing a state of 7 th in the construction method according to the embodiment of the present invention;
FIG. 13 is a schematic view showing the state of the construction method in the embodiment of the present invention at state 8;
FIG. 14 is a schematic view showing a 9 th state of the construction method according to the embodiment of the present invention;
FIG. 15 is a view showing a 10 th state of the construction method according to the embodiment of the present invention;
FIG. 16 is a view showing the 11 th state of the construction method according to the embodiment of the present invention;
FIG. 17 is a schematic view showing a 12 th state of a construction method according to an embodiment of the present invention;
FIG. 18 is a schematic view showing a 13 th state of a construction method according to an embodiment of the present invention;
FIG. 19 is a view showing a 14 th state of the construction method according to the embodiment of the present invention;
FIG. 20 is a view showing a 15 th state of the construction method according to the embodiment of the present invention;
FIG. 21 is a view showing a 16 th state of a construction method according to an embodiment of the present invention;
the reference numbers in the figures are: the device comprises a net rack platform I, a climbing frame type jacking mechanism II, a positioning point C, an upper jacking seat 1, a lower jacking seat 2, a jacking support 3, a jack 4, a shelving cross beam 5, a connecting cross beam 6, a jacking rod 7, a jacking cross beam 8, an oil pump 9, an oil pipe 10, a control box 11, a base 12, a bolt ball 13, a support 14, a fixed angle steel 15, a main purline 16, a secondary purline 17, a batten 18, a plane template 19, masonry materials 20, a cable wind rope 21, a concrete floor 22, a device corridor floor 23, a roof template support frame 24, a concrete girder 25 and a concrete roof 26.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and the detailed description. The technical characteristics of the embodiments of the invention can be correspondingly combined without mutual conflict.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The technical characteristics in the embodiments of the invention can be correspondingly combined on the premise of no mutual conflict.
In the description of the present invention, it should 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 to the other element, i.e., intervening elements may be 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 is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.
In a preferred embodiment of the present invention, as shown in fig. 1, there is provided a construction platform for a wall and an upper concrete structure using a jacking net rack, which comprises a net rack platform i and a plurality of climbing mechanisms ii distributed under the net rack platform i. The concrete structure and the implementation form of the net rack platform I and the climbing frame type jacking mechanism II are respectively described in detail below.
The net rack platform I is used as an operation platform for stockpile masonry and coating and is also used as a high formwork support frame for pouring concrete structures above the building. The net rack platform I in the embodiment can adopt a bolt ball net rack platform, and a plane template 19 which is also used as a stacking surface of masonry materials 20 and a pouring bottom die of a concrete floor 22 is laid on the top surface of the net rack platform I.
And each climbing frame type jacking mechanism II is used for providing lifting power for the net rack platform I, and the whole height adjusting requirements required by the operation at different heights are met. Therefore, as shown in fig. 2, in the present embodiment, the climbing frame type jacking mechanism ii includes a jacking bracket 3, and a jacking cross beam 8 and a jacking device installed in the jacking bracket 3. Wherein, the jacking support 3 has a plurality ofly, can assemble along vertical festival by festival formula. All the jacking brackets 3 have the same structural and dimensional parameters, so that the assembly and reuse are convenient. Each jacking support 3 is vertically stressed by 4 upright columns, and the 4 upright columns are connected into a whole by arranging a connecting beam 6. The top and the bottom of the 4 upright posts can be provided with connecting end plates for being connected with other jacking supports 3 through bolts.
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 moves up and down synchronously along with the hydraulic jacking equipment. One jacking stroke of the hydraulic jacking equipment is greater than the height of the jacking support 3, so that the matching relation between the upper jacking seat 1 and the upper jacking support 3 can be changed through output displacement. Each jacking bracket 3 is provided with a placing cross beam 5 at the upper part except for a connecting cross beam 6 in the transverse direction. The cross beam 5 is set up for bearing, so it needs to select the steel with higher strength, and the cross beam 6 does not need to bear, and its strength can not need to be too high. The upper jacking seat 1 can be supported on the laying cross beam 5 to form vertical bearing force. The jacking cross beam 8 can be horizontally erected on the laying cross beam 5 at the upper part of the jacking support 3 in a detachable mode to provide bearing support for the lower jacking seat 2. When the jacking cross beam 8 does not exist in the jacking support 3, the lower jacking seat 2 can freely penetrate through the whole jacking support 3 to lift up and down.
In order to ensure the stability of the support, the shelving cross beam 5 and the jacking cross beam 8 are both required to be provided with two parallel beams.
The net rack platform I and each climbing rack type jacking mechanism II are connected and fixed through the upper jacking seat 1, and the whole net rack platform I is lifted by each hydraulic jacking device in the climbing rack type jacking mechanism II in a synchronous control mode.
It should be noted that the hydraulic jacking device in the jacking device can adopt any realizable form. In this embodiment, because whole rack platform I need be gone up and down by the hydraulic jacking equipment synchro control in each climbing frame formula climbing mechanism II, consequently hydraulic jacking equipment need keep higher coordination uniformity at the during operation, avoids leading to I unstability of rack platform. Therefore, as shown in fig. 2, the hydraulic jacking apparatus in the present embodiment includes a jack 4 installed in the jacking bracket 3 and an oil pump 9 connected to the jack 4 through an oil pipe 10; and 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 a wired or wireless manner.
In the invention, in order to construct different heights, the height of the net rack platform I needs to be adjusted by assembling the jacking supports 3, and the jacking devices can climb up and down in the jacking supports 3 which are assembled section by section. As shown in fig. 4, the working principle of the climbing frame type jacking mechanism ii of the invention is shown: step 1, supporting the bottom of a lower jacking seat 2 on a jacking cross beam 8, erecting the jacking cross beam 8 on a laying cross beam 5 of a lower jacking support 3, controlling a control jack 4 to extend, and enabling an upper jacking seat 1 to ascend along with the control jack, wherein a distance is reserved between the upper jacking seat 1 and the uppermost jacking support 3; step 2, continuously installing a section of upright post of the jacking bracket 3 above; step 3, mounting a shelving cross beam 5 and a connecting cross beam 6 of the uppermost jacking bracket 3; step 4, controlling the jack 4 to contract, and enabling the upper jacking seat 1 to descend along with the contraction, so that the upper jacking seat falls on the placing cross beam 5 of the uppermost jacking support 3 to form vertical bearing force; step 5, controlling the jack 4 to contract by taking the upper jacking seat 1 as a fulcrum, and enabling the lower jacking seat 2 to ascend and enter the upper section of jacking support 3; step 6, erecting two jacking cross beams 8 on the placing cross beam 5 below the lower jacking seat 2, and controlling the jack 4 to extend to ensure that the lower jacking seat 2 is just positioned on the two jacking cross beams 8 to form vertical bearing force; and 7, taking the lower jacking seat 2 supported on the jacking cross beam 8 as a fulcrum, controlling the jack 4 to extend, and continuing the next cycle.
It should be noted that the connection form between the upward lifting seat 1 and the net rack 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 this embodiment, the upper lifting seat 1 is provided with a lifting rod 7, and the top of the lifting rod 7 is detachably connected and fixed with the end bearing of the bolt ball 13 of the grid platform i to form a lifting point. Generally speaking, the jacking point takes the assembly height of the net rack into consideration, and the bolt ball 13 fixedly connected with the jacking rod 7 can be an upper chord ball joint of the net rack platform I. But in other embodiments, the lower chord may of course be used as the jacking point.
It should be noted that the concrete form of the rack platform i may be various, and in this embodiment, a bolt ball rack platform is preferably adopted. As shown in fig. 3, main purlins 16 are fixed on a plurality of upper chord ball nodes of the net rack platform I through brackets 14, one main purlin 16 is fixed on each upper chord ball node, and the main purlins 16 are parallel to each other. Furthermore, a series of secondary purlins 17 can be further vertically fixed on each primary purlin 16 to form a supporting surface under the installation area of the whole plane template 19, the secondary purlins 17 are parallel to each other, and the plane template 19 is horizontally erected on the supporting surface through the battens 18 at the bottom. In this embodiment, the bracket 14 and the primary purlin 16 may be respectively welded with a fixed angle 15 for connection, the primary purlin 16 may be connected and fixed with the fixed angle 15 welded on the bracket 14 by a split bolt, and the secondary purlin 17 is connected and fixed with the fixed angle welded on the top of the primary purlin 16 by a split bolt. Bolt holes can be arranged in the fixed angle steel 15, and the fixed angle steel can be detachably fixed through the split bolts.
The construction platform is provided with the hydraulic jacking equipment special for the lower part and a bearing grid structure serving as a construction operation platform, the construction template is paved on the construction platform, the integral jacking and lifting mode is adopted, the jacking construction materials and operators perform wall masonry operation in the process of gradually rising, after the construction materials and the operators reach the designed elevation, the construction platform is converted into a high-support formwork for pouring the heavy roof panel, and the construction platform can also serve as a construction method for coating the wall and installing a scaffold serving as a roof hanging component in the process of section descending. Each climbing frame formula climbing mechanism and rack platform in this construction platform include: the system comprises a jacking support, a built-in jack, a computer-controlled synchronous pump station, a bolt ball joint net rack platform, a construction template and the like. The construction method can be used as an operation platform for stacking, coating, roof hanging and the like in sequence, and can be used as a high formwork support for heavy roofs. The invention can enlarge the working area in the construction process, reduce the overhead operation safety measure cost, avoid the condition of building a full red scaffold which is time-consuming and labor-consuming 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 particularity of the construction method is that: the upper part of the building is provided with a concrete floor 22 for placing equipment and an access passage, and a concrete roof 26 is erected on the concrete floor 22 through a concrete girder 25.
The construction method comprises the following specific steps:
s1, in the inside construction area of building outer wall, through designing and checking net rack platform and fulcrum, arrange a plurality of setpoint C that are used for carrying out the jacking to net rack platform I according to the design result to at every setpoint C department installation a section jacking support 3, and install in jacking support 3 the jacking device, the lower jacking seat 2 of jacking device and the bottom of jacking support 3 all make level the back and support subaerially.
As shown in fig. 5, an exemplary building plan layout is provided, and the overall size of the building plan layout is 30 meters long and 21 meters wide, in this embodiment, 8 positioning points C can be provided, and are divided into two rows, four in each row, and evenly distributed in the whole 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 by design checking calculation by taking all jacking devices arranged in the construction area as a reference, connecting and fixing the net rack platform I and each climbing type jacking mechanism II through the upper jacking seat 1, and horizontally paving the plane formwork 19 on the top of the net rack platform I to form a construction platform, as shown in figure 7. It should be noted that, the lowest section of the wall body of the building can be directly built on the ground without the aid of the net rack platform I.
S3, laying an isolation cloth on the top surface of the plane template 19, and stacking masonry materials 20 for building a wall on the isolation cloth; and (3) synchronously carrying out a trial jacking test on the net rack platform I stacked with the masonry material 20 through hydraulic jacking equipment in all the climbing frame type jacking mechanisms II, as shown in figure 8. And after the construction platform is confirmed to meet the operation requirement, the hydraulic jacking equipment is returned.
S4, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms II to jack the net rack platform I, enabling the net rack platform I to stably rise by one jacking stroke and then to be static, enabling the height between the upper jacking seat 1 in each climbing frame type jacking mechanism II and the jacking support 3 below the upper jacking seat 1 to be not less than the height of one section of jacking support 3, then installing a second section of jacking support 3 on the first section of jacking support 3, and controlling the upper jacking seat 1 to descend through the hydraulic jacking equipment to enable the bottom of the upper jacking seat 1 to be just supported on the shelving cross beam 5 to form vertical bearing force, as shown in figure 9.
S5, taking the upper jacking seat 1 supported on the resting cross beam 5 as an acting point, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms II to synchronously contract to drive the respective lower jacking seat 2 to ascend by at least one section of jacking support 3, and then erecting a jacking cross beam 8 on the resting cross beam 5 nearest to the lower jacking seat 2 to support the lower jacking seat 2 on the jacking cross beam 8 to form vertical bearing; then, the net rack platform I is used as a building and operating platform, and wall building operation within the range of the construction height is carried out by using the building material 20, as shown in figure 10.
S6, repeating S4 and S5, and building the next height of the building wall using the grid platform i raised further, as shown in fig. 11 and 12.
S7, repeating S6 continuously until the net rack platform I reaches the elevation position capable of meeting the last section of wall construction, enabling hydraulic jacking equipment in all the climbing type jacking mechanisms II not to shrink any more, and erecting temporary placement pieces between each upper jacking seat 1 and the placement cross beam 5 nearest below, so that the upper jacking seats 1 are supported on the placement cross beams 5 through the temporary placement pieces to form vertical bearing force; and then, the net rack platform I is used as a building and operating platform, and the building operation of the last section of the wall body is completed by using the building material 20, so that the wall body reaches the designed elevation, as shown in figures 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, painting a release agent and plugging gaps, so that the grid platform I is converted into a high formwork for pouring the concrete floor 22; the concrete floor 22 and the reinforcing steel bars of the concrete girder 25 are bound on the plane template 19, then concrete is poured and cured to form the concrete floor 22, then the pouring templates of the concrete girder 25 and the concrete roof 26 are erected on the concrete floor 22, and finally concrete is poured and cured to form the concrete girder 25 and the concrete roof 26, as shown in fig. 15. The concrete floor 22 can be used for constructing the floor 23 of the corridor. During actual construction, the pouring formwork of the concrete roof 26 needs to be supported by the erection of the roof formwork support frame 24, and the construction is detachable after completion.
And S9, after the concrete girder 25 and the concrete roof 26 are maintained, controlling all hydraulic jacking equipment in the climbing frame type jacking mechanism II to slightly jack against the building structure above the net rack platform I, and then sequentially detaching the temporary shelving part and the uppermost jacking bracket 3, as shown in FIG. 16.
S10, controlling the hydraulic jacking equipment in all the climbing frame type jacking mechanisms II to contract, so that the net rack platform I is separated from the building structure above the net rack platform I until the bottoms of the upper jacking seats 1 are just supported on the placing cross beam 5 to form vertical bearing force; and then, taking the upper jacking seat 1 supported on the resting cross beam 5 as an acting point, controlling each hydraulic jacking device to continuously contract, driving the respective lower jacking seat 2 to ascend so as to be separated from the jacking cross beam 8 below, and detaching and reinstalling the jacking cross beam 8 onto the resting cross beam 5 of the next jacking support 3, as shown in fig. 17.
S11, controlling the hydraulic jacking devices in all the climbing frame type jacking mechanisms II to synchronously output extension displacement, and further driving the respective lower jacking seats 2 to be positioned and supported on the jacking cross beams 8 in the next section of jacking support 3; and controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms II to synchronously output the extension displacement continuously, detaching the uppermost jacking support 3 after the respective upper jacking seat 1 is separated from the uppermost jacking support 3, as shown in fig. 18.
And S12, continuously repeating S10 and S11, detaching the jacking bracket 3 section by section from top to bottom, gradually descending the net rack platform I, and brushing or installing at different heights according to design requirements in the descending process of the net rack platform I, as shown in FIG. 19.
S13, when the net rack platform I descends to a position close to the ground and only the last jacking support 3 is left, supporting the lower jacking seat 2 at the bottom of the hydraulic jacking equipment in all the climbing type jacking mechanisms II on the ground, then jacking the upper jacking seat 1 to separate the upper jacking seat 3 from the jacking support 3, and then sequentially detaching the plane template 19, the net rack platform I, the jacking support 3 and the jacking device, as shown in figure 20. Finally, the site is cleaned, and after the construction is finished, the site is shown in figure 21.
It should be noted that in the descending process of the net rack platform I, the specific painting or installation operation needs to be performed according to the building design and construction requirements. In this embodiment, the wall and the bottom of concrete floor 22 can be painted according to design requirements for decoration, and the roof hanging and overhanging members, including stairs and the high-altitude platform passage to be railed, are installed at the same time.
It should be noted that, in the process of raising the grid platform i, when the total height of the vertically assembled jacking bracket 3 is higher than a set value, a throwing support or a cable rope 21 needs to be arranged to prevent instability and rollover.
And finally, when the net rack platform I and the climbing frame type jacking mechanism II are disassembled, all the components can be transported to the next construction site for reuse.
The construction method only shows a principle framework, but in actual application, the construction details need to be optimized and adjusted by combining a specific construction organization sequence. In order to further facilitate understanding, a specific implementation form of the construction method is shown by the following embodiment.
In this embodiment, the preparation of the technology before construction is as follows:
1. according to the maximum reaction force result obtained by simulation analysis and calculation in the construction process, relevant safety increasing coefficients are considered according to specifications, and the type of jacking equipment is selected;
2. designing a net rack platform in advance according to the range and the weight of a planned construction structure and the load condition in the construction process, determining the size, the section size, the height and the like of a grid, and processing and manufacturing the grid in a professional manufacturer;
the formal construction process is as follows:
the first step is as follows:
1. the ground line snapping, positioning and installing the jacking equipment and the first grid jacking support frame, and debugging and leveling;
the second step is that:
1. installing a net rack operation platform for jacking, an upper purline and a template by taking a preset jacking point as a reference, and meanwhile, manually building a bottommost wall;
2. the jacking point is preferably arranged at the upper chord sphere node of the grid structure, and the length of the jacking rod is determined by calculation in advance during field implementation so as to prevent the jacking equipment from colliding with the web member of the grid structure;
3. the assembly requirement of the net rack platform is as follows: the longitudinal and transverse length deviation 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 the position of the adjacent jacking point is less than or equal to L/400 +/-15 mm;
the third step:
1. inspecting the installation quality of the net rack platform, paving isolation cloth on the template after the net rack platform is qualified, and uniformly stacking the wall material to be built;
2. the method comprises the following steps of trial jacking a net rack platform for 12 hours, and checking whether supporting points, jacking equipment, net rack deformation, ground foundation and the like have problems or not;
3. when the net rack platform is lifted in a test way, the operating stroke of a jack cylinder is 200mm, and the distance between the lower chord of the platform and the ground is not more than 500 mm;
the fourth step:
1. starting a hydraulic pump station, so that a hydraulic jacking jack piston drives the net rack to jack for a stroke and then stand still;
2. a second section of jacking support is installed by matching a small winch or a manual hoist, the bolt is screwed down, and the fastening and leveling conditions are checked;
3. slowly contracting the oil cylinder, and descending for about 150 strokes to enable the upper jacking seat to be located on the second section of support placing cross beam;
4. checking the operation data of the oil cylinder and the verticality and the horizontal condition of the support frame again;
the fifth step:
1. taking an upper jacking seat supported on a beam of the second jacking frame as a stress point, contracting the oil cylinder to drive a lower jacking seat to move upwards for a stroke, and arranging a lower two jacking beams between the lower jacking seat of each oil cylinder and the placing beam of the first jacking frame after the upper jacking seat is in place;
2. and (5) checking the jacking cross beam in place, the verticality of each jacking frame and the integral levelness of the net rack platform. The laying width of the jacking beam is required to be more than 50mm, the verticality of the jacking frame is less than or equal to (H/1000, 10mm), and the height difference of the adjacent jacking points is less than or equal to (L/400, 15 mm);
3. taking the jacked net rack platform as a building and operating platform to carry out manual building operation on the wall;
and a sixth step:
1. repeating the steps of 4-5, replacing the laying beam and adding a jacking bracket by a telescopic jack cylinder, continuously jacking the net rack platform, and simultaneously carrying out manual building of the wall body;
the seventh step:
1. repeating the step 6, continuously jacking the net rack platform until the preset elevation is reached, and meanwhile, manually building the wall;
2. when the support frame is higher, a throwing support or a guy rope can be arranged as appropriate;
3. after the net rack construction platform is jacked to the top, the jacking jack does not shrink any more, and a temporary shelving piece needs to be additionally arranged between the upper jacking seat and the jacking support shelving cross beam so as to be convenient for later-stage dismantling and unloading.
Eighth step:
1. after the wall is built, removing the isolation cloth, cleaning the upper template of the net rack, coating a release agent, and converting the platform into a high formwork support;
2. sealing gaps around the platform, and binding floor and girder steel bars;
3. pouring floor concrete;
4. after the floor maintenance is finished and the concrete reaches a certain strength, erecting a girder and a roof panel template on the floor, and pouring the girder and the roof panel concrete;
the ninth step:
1. after the roof maintenance period is reached, starting a hydraulic pump station, controlling a hydraulic jacking jack to slightly jack the roof tightly, and removing the temporary shelving member; sealing gaps around the platform, and binding floor and girder steel bars;
2. the supporting seat on the hydraulic jacking jack is kept still, and the first section of jacking support is dismantled after the first section of jacking support tie rod is removed;
the tenth step:
1. controlling the hydraulic jacking jack cylinder body to descend to separate the steel structure net rack from the roof, and then slowly falling down to enable the upper jacking seat to fall onto the next jacking frame placing beam;
2. after the verticality and the like are checked to be correct by the falling position, controlling the jack cylinder to shrink to drive the lower jacking seat to be separated from the lower jacking cross beam;
3. manually detaching the jacking cross beam of the lower jacking seat with the assistance of chain block and replacing and installing the jacking cross beam on the placing cross beam of the next jacking frame;
the eleventh step:
1. controlling the hydraulic jack cylinder to descend to enable the lower jacking seat to be placed on the lower placing cross beam;
2. after the lower jacking seat is checked to be laid without errors, the upward stroke of the oil cylinder is 50-100 mm, and the upper jacking seat is separated from the jacking support;
3. manually hanging and detaching a top jacking bracket section by using the assistance of a chain block and chain block;
the twelfth step:
1. repeating the tenth step to the tenth step, and removing the jacking supports section by controlling the lifting of the hydraulic jack cylinder body to enable the platform to descend section by section until the platform falls to the ground; after the lower jacking seat is checked to be placed without errors, the upward stroke of the oil cylinder is 50-100 mm, and the upper jacking seat is separated from the jacking support;
2. manually carrying out wall and top plate fabric brushing operation and roof hanging and cantilever member construction in the process of descending the platform section by section;
3. and after the cable is lowered to a certain height, the cable rope is removed.
And a thirteenth step of:
1. when the net rack is lowered to the ground, the template, the net rack platform, the jacking equipment and the bracket are sequentially dismantled;
a fourteenth step of:
1. cleaning the site, and finishing the process of leaving the site or transferring the site to the next unit site for splicing construction again.
The above-described embodiments are merely preferred embodiments of the present invention, and are 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 upper jacking method that the jacking equipment is positioned at the top of the bracket, and of course, the construction can also adopt a lower jacking method that the jacking equipment is positioned at the root of the bracket. In addition, if the repeated replacement construction is not considered, the structural mode of the net rack platform can adopt structures such as a welded ball net rack or a space truss to carry out operation besides the bolt ball net rack. The formwork for the working face may be a wood formwork or the like commonly used for civil engineering, or may be a material of other material such as a pattern steel plate. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A wall body utilizing a jacking net rack and an upper concrete structure construction platform are characterized by comprising 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 also used as a stacking surface of a masonry material (20) and a pouring bottom template of a concrete floor slab (22) is laid on the top surface of the net rack platform (I);
the climbing frame type jacking mechanism (II) comprises a jacking support (3), a jacking cross beam (8) and a jacking device, wherein the jacking cross beam (8) and the jacking device are installed in the jacking support (3); the plurality of jacking supports (3) can be vertically assembled section by section in a section form; 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 moves up and down synchronously with the hydraulic jacking equipment; one jacking stroke of the hydraulic jacking equipment is greater than the height of the jacking support (3); a placing cross beam (5) is arranged at the upper part of each jacking support (3), and the upper jacking seat (1) can be supported on the placing cross beam (5) to form a vertical bearing force; the jacking cross beam (8) can be horizontally erected on the placing cross beam (5) at the upper part of the jacking support (3) in a detachable mode to provide bearing support for the lower jacking seat (2); when the jacking cross beam (8) does not exist in the jacking support (3), the lower jacking seat (2) can freely penetrate through the whole jacking support (3) to lift up and down;
the net rack platform (I) is fixedly connected with each climbing frame type jacking mechanism (II) through the upper jacking seat (1), and the whole net rack platform (I) is synchronously controlled to ascend and descend by hydraulic jacking equipment in each climbing frame type jacking mechanism (II).
2. The wall and upper concrete structure construction platform using the jacking net rack according to claim 1, wherein the hydraulic jacking equipment comprises a jack (4) installed in the jacking bracket (3) and an oil pump (9) connected to the jack (4) through an oil pipe (10); and oil pumps (9) in all the climbing frame type jacking mechanisms (II) are uniformly controlled by a control box (11).
3. The wall body using the jacking net rack and the construction platform of the upper concrete structure according to claim 1, wherein the jacking rod (7) is arranged on the upper jacking seat (1), and the top of the jacking rod (7) is detachably connected and fixed with the bolt ball (13) of the net rack platform (i).
4. The wall body and upper concrete structure construction platform using the jacking net rack according to claim 1, wherein the bolt ball (13) fixedly connected with the jacking rod (7) is an upper chord ball joint of the net rack platform (i).
5. The wall body and upper concrete structure construction platform using the jacking net rack according to claim 4, wherein a plurality of parallel main purlins (16) are fixed on a plurality of upper chord ball joints of the net rack platform (I) through brackets (14), a plurality of secondary purlins (17) are vertically fixed on each main purlin (16) to form a supporting surface, and the plane formwork (19) is horizontally erected on the supporting surface through a bottom batten (18).
6. The wall body and upper concrete structure construction platform using the jacking net rack according to claim 5, wherein the primary purline (16) is connected and fixed with a fixed angle steel (15) welded on the bracket (14) through a split bolt, and the secondary purline (17) is connected and fixed with a fixed angle steel welded on the top of the primary purline (16) through a split bolt.
7. A construction method of a wall body and an upper concrete structure in a building by using the construction platform as claimed in any one of claims 1 to 6, for constructing a building on which a concrete floor (22) is provided at an upper portion and a concrete roof (26) is erected on the concrete floor (22) by a concrete girder (25), characterized by comprising the steps of:
s1, in a construction area inside an outer wall of a building, arranging a plurality of positioning points (C) for jacking the net rack platform (I) according to a design result by designing and checking the net rack platform and supporting points, installing a jacking support (3) at each positioning point (C), installing a jacking device in each jacking support (3), and leveling and supporting the bottoms of a lower jacking seat (2) and the jacking support (3) of each jacking device on the ground;
s2, assembling the net rack platform (I) by taking all jacking devices arranged in a construction area as a reference, connecting and fixing the net rack platform (I) and each climbing type jacking mechanism (II) through the upper jacking seat (1), and horizontally paving the plane template (19) on the top of the net rack platform (I) to form a construction platform;
s3, laying an isolation cloth on the top surface of the plane template (19), and stacking masonry materials (20) for building a wall body on the isolation cloth; synchronously carrying out trial jacking tests on the net rack platform (I) stacked with the masonry materials (20) through hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II), and enabling the hydraulic jacking equipment to return after the construction platform meets the operation requirements;
s4, controlling hydraulic jacking equipment in all climbing frame type jacking mechanisms (II) to jack the net rack platform (I), enabling the net rack platform (I) to stably rise for one jacking stroke and then to be static, enabling the height between an upper jacking seat (1) and a lower jacking support (3) in each climbing frame type jacking mechanism (II) to be not less than the height of one section of jacking support (3), then installing a second section of jacking support (3) on the first section of jacking support (3), and controlling the upper jacking seat (1) to descend through the hydraulic jacking equipment to enable the bottom of the upper jacking seat (1) to be just supported on the shelving cross beam (5) to form vertical bearing;
s5, taking the upper jacking seat (1) supported on the resting beam (5) as an acting point, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) to synchronously contract to drive the respective lower jacking seat (2) to ascend by the height of at least one section of jacking support (3), and then erecting a jacking beam (8) on the resting beam (5) nearest to the lower jacking seat (2) to support the lower jacking seat (2) on the jacking beam (8) to form vertical bearing; then, the net rack platform (I) is used as a building and operating platform, and wall building operation within the range of the construction height is carried out by using building materials (20);
s6, repeating S4 and S5, and building the next section of height of the building wall by utilizing the grid platform (I) which is further lifted;
s7, continuously repeating S6 until the net rack platform (I) reaches the elevation position capable of meeting the construction of the last section of wall, the hydraulic jacking devices in all the climbing type jacking mechanisms (II) do not shrink any more, and a temporary placing piece is erected between each upper jacking seat (1) and the placing cross beam (5) nearest below, so that the upper jacking seats (1) are supported on the placing cross beams (5) through the temporary placing pieces to form vertical bearing; then, the net rack platform (I) is used as a building and operating platform, and the building operation of the last section of the wall body is finished by using the building material (20), so that the wall body reaches the design elevation;
s8, after the wall is built, removing the isolation cloth on the plane template (19), cleaning the top surface of the plane template (19), brushing a release agent and plugging gaps, so that the net rack platform (I) is converted into a high formwork for pouring a concrete floor (22); binding reinforcing 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 a pouring template 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 the concrete girder (25) and the concrete roof (26) are maintained, controlling all hydraulic jacking devices in the climbing frame type jacking mechanisms (II) to slightly jack up the building structure above the net rack platform (I), and then sequentially dismantling the temporary shelving members and the uppermost jacking bracket (3);
s10, controlling the contraction of hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) to separate the net rack platform (I) from the building structure above the net rack platform (I) until the bottoms of the upper jacking seats (1) are just supported on the shelving cross beam (5) to form vertical bearing force; then, taking the upper jacking seat (1) supported on the resting cross beam (5) as an acting point, controlling each hydraulic jacking device to continuously contract, driving each lower jacking seat (2) to ascend so as to be separated from the lower jacking cross beam (8), and dismantling and reinstalling the jacking cross beam (8) onto the resting cross beam (5) of the next jacking support (3);
s11, controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) to synchronously output extension displacement, and further driving the respective lower jacking seats (2) to fall and be supported on jacking cross beams (8) in the next section of jacking support (3); controlling hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) to synchronously output the extension displacement continuously, detaching the uppermost jacking support (3) after the respective upper jacking seat (1) is separated from the uppermost jacking support (3);
s12, continuously repeating S10 and S11, detaching the jacking support (3) section by section from top to bottom, gradually descending the net rack platform (I), and brushing or installing different heights according to design requirements in the descending process of the net rack platform (I);
s13, when the net rack platform (I) descends to be close to the ground and only the last jacking support (3) is left, the lower jacking seat (2) at the bottom of the hydraulic jacking equipment in all the climbing frame type jacking mechanisms (II) is supported on the ground, then the jacking seat (1) in the jacking mechanism enables the jacking support (3) to be separated from the jacking support, and then the plane template (19), the net rack platform (I), the jacking support (3) and the jacking device are sequentially detached to complete construction.
8. The construction method as claimed in claim 7, wherein the wall surface and the bottom surface of the concrete floor (22) are painted according to design requirements while the rack platform (i) is lowered, and roof hanging and overhanging members are installed.
9. The construction method as claimed in claim 7, wherein a throwing support or a guy rope (21) is provided when the total height of the vertically assembled jacking-up legs (3) is higher than a set value during the raising of the grid deck (i).
10. The construction method according to claim 7, wherein after the grid platform (I) and the climbing frame jacking mechanism (II) are disassembled, all the components are transported to the next construction site for reuse.
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| CN112112284A (en) * | 2020-09-25 | 2020-12-22 | 河南省安装集团有限责任公司 | Integral jacking construction method for net rack |
| WO2021196927A1 (en) * | 2020-03-31 | 2021-10-07 | 中建三局集团有限公司 | Rail and frame integrated supporting and jacking system for integrated platform and jacking method therefor |
| 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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| CN112112284A (en) * | 2020-09-25 | 2020-12-22 | 河南省安装集团有限责任公司 | Integral jacking construction method for net rack |
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