CN112663927B - Steel structure dome aerial work stepped operation platform and construction method thereof - Google Patents
Steel structure dome aerial work stepped operation platform and construction method thereof Download PDFInfo
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- CN112663927B CN112663927B CN202010721435.0A CN202010721435A CN112663927B CN 112663927 B CN112663927 B CN 112663927B CN 202010721435 A CN202010721435 A CN 202010721435A CN 112663927 B CN112663927 B CN 112663927B
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Abstract
A steel structure dome aloft work stepped operation platform and a construction method thereof are hung at the bottom of a dome framework and comprise hanging points, hanging rods and a stepped platform, wherein the hanging points are hung on secondary beams through door-shaped hanging plates; the suspender corresponds the vertical setting of hoisting point, and the equal altitude setting such as the bottom layer board of the middle layer board of lower floor's jib and upper boom, ladder platform include central platform and around central platform around a series of annular platform that the echelonment set up, the crossbeam one end of mesa truss links firmly with the bottom layer board of upper boom, the other end links firmly with the middle layer board of lower floor's jib, is provided with the cat ladder between the horizontal mesa of adjacent layer. The invention has novel design, realizes the step-by-step arrangement of the platform surface depending on the dome structure through the suspension rods arranged at intervals along the annular ring beam, has convenient operation and is suitable for the construction of a large-span curved dome; the hoisting point is free from welding, so that the mounting and dismounting are convenient; the top and the bottom can be constructed simultaneously, so that the construction period is saved; the integrity is strong, and the construction safety is guaranteed.
Description
Technical Field
The invention relates to the technical field of dome construction, in particular to a steel structure dome aerial work stepped operation platform and a construction method thereof.
Background
With the development of the building industry, large-scale buildings are continuously developed, modeling curtain walls with different shapes gradually become a mainstream demand, and in order to meet the demand, the operation platform as a construction auxiliary structure is endowed with new requirements, which is reflected in that the modeling and the structure generate various special-shaped changes according to the requirements of the building modeling.
At present, most of building construction operation platforms are of planar structures, are suitable for local construction operation, and are mainly concentrated on floor type platforms, for large-span dome structures with different shapes, the use of the large-span dome structures has a plurality of disadvantages, if the large-span dome structures need to be frequently moved to meet the requirement of large span, the ground construction and the high-altitude construction are crossed in space operation, the simultaneous non-interference operation of the two aspects cannot be guaranteed, and the like. However, the construction platform is only suitable for the same plane or a regular roof structure, is not suitable for a dome structure, and needs to be removed for repairing a hoisting point connecting plate after later-stage dismantling.
Disclosure of Invention
The invention aims to provide a steel structure dome aloft work stepped operation platform and a construction method thereof, which solve the technical problems that the construction platform of the existing platform structure is mostly concentrated on a plane floor type structure, needs to be frequently transferred, can not ensure simultaneous interference-free execution in two aspects when the ground construction and the aloft construction are crossed in space work, and is not suitable for the construction of a large-span multi-curvature dome structure, and the technical problems that a few hoisting platforms are welded with a main body structure at present, the main body attachment surface is easily damaged, the installation and dismantling operation is complex, and the repeated use cannot be realized.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a cascaded operation platform of steel construction dome high altitude construction which characterized in that: the dome framework comprises a central ring beam, main beams and secondary beams, wherein the central ring beam is arranged in the center of the top of the dome framework, the main beams are uniformly and radially arranged from the central ring beam to the periphery of the bottom, and the secondary beams are horizontally arranged between the adjacent main beams in a layered manner to form a multilayer annular closed structure with different heights;
the operating platform comprises a lifting point, a lifting rod and a step platform;
the lifting points are arranged on the secondary beam and the central ring beam, are arranged in a layered manner along the circumferential direction of the secondary beam or the central ring beam at intervals and avoid the curtain wall adapter; the hanging plate comprises a door-shaped hanging plate, wherein the door-shaped hanging plate is hung on the secondary beam;
the hanger rod is vertically arranged corresponding to the hanging point and comprises a main body rod, a middle supporting plate and a bottom supporting plate, wherein the top of the main body rod is fixedly connected with an H-shaped connecting plate, the H-shaped connecting plate is transversely arranged on the inner side of the bottom of the door-shaped hanging plate, and two side plates of the H-shaped connecting plate are respectively attached to and fixedly connected with two wing plates of the door-shaped hanging plate; the middle supporting plate is provided with a preformed hole which is horizontally sleeved outside the main body rod and fixedly connected with the main body rod; the bottom supporting plate is horizontally welded at the bottom of the main body rod; in the two adjacent layers of the hanging rods, the middle supporting plate of the lower layer of the hanging rod is arranged at the same height as the bottom supporting plate of the upper layer of the hanging rod;
the stepped platforms include a central platform and a series of annular platforms arranged in a stepped manner around the periphery of the central platform;
the central platform is arranged at the bottom of the central girt and is formed by enclosing top-layer hanger rods which are hung at the bottom of the central girt at intervals, bottom support plates are arranged at the bottoms of the top-layer hanger rods, and steel beams are arranged between the bottom support plates in a crossed mode to form a central truss, so that the central platform is formed;
the annular platform is a horizontal annular truss with gradient change from high to low, and is arranged between the adjacent layers of suspenders, one side of the annular platform is fixedly connected with the bottom supporting plate of the upper layer of suspenders, and the other side of the annular platform is fixedly connected with the middle supporting plate of the lower layer of suspenders;
in the step platform, a ladder stand is arranged between the horizontal table tops of adjacent layers; the height of the step platform is gradually reduced from the center of the top of the dome to the periphery of the bottom of the dome, and the step platform is continuously arranged in layers to form a construction surface.
The horizontal annular truss comprises chord members at two sides and a web member in the middle; the chord members are arranged between the middle supporting plates or the bottom supporting plates of two adjacent main body rods on the same layer, and the end parts of the chord members are respectively and correspondingly fixedly connected; one end of the web member is fixedly connected with the bottom support plate of the upper layer suspender, and the other end of the web member is fixedly connected with the middle support plate of the lower layer suspender.
Preferably, the H-shaped connecting plate is of an integral structure or a split structure; when the structure is an integral structure, the two side plates are respectively connected with the two wing plates of the door-shaped hanging plate through bolts, and the middle web plate is inserted into the open slot at the top of the main body rod from top to bottom and is fixed by full welding; when the split structure is adopted, the split structure comprises two T-shaped plates, and webs of the T-shaped plates are correspondingly welded and fixed on two side faces of the top of the main body rod.
Preferably, the chord member or the web member is fixedly connected with the middle supporting plate or the bottom supporting plate through a connecting plate; the connecting plate is a plane plate or a right-angle plate, is vertically welded on the middle supporting plate or the bottom supporting plate when being the plane plate, is connected with the end part bolt of the chord member or the web member, is connected with the middle supporting plate or the bottom supporting plate by the bolt at one side when being the right-angle plate, and is connected with the end part bolt of the chord member or the web member at the other side.
Further preferably, the connection mode of the middle supporting plate and the main body rod is welding, or the two sides of the top and the bottom of the middle supporting plate are respectively provided with a clamp, so that adjustable connection is realized.
Further preferably, the ladder stand comprises steps and escalators on two sides, and the tops and bottoms of the steps are fixedly connected with the plane trusses on the upper layer and the lower layer respectively.
Preferably, the hanger rod is a square tube; only a bottom supporting plate is arranged on the suspension rod which is at the innermost circle away from the center of the dome, and a supporting beam is arranged between the bottom of the suspension rod and a steel beam at the center of the dome for reinforcement; and a bottom supporting plate is only arranged on the outermost suspension rod circle far away from the center of the dome, and a reinforcing support is arranged between the bottom of the suspension rod and the peripheral curtain wall keel.
Preferably, the step platforms are respectively paved with scaffold boards, and guard rails are arranged on two sides of each layer of horizontal platform surface; the guard rail comprises upright posts on two sides, a cross rod between the upright posts and a counter pull rod arranged at the bottom of the horizontal table board and the upright posts on two sides of the drawknot.
Preferably, the chord members and the web members are made of channel steel, square steel or angle steel, the web members are arranged in a Z shape, and the planar truss is divided into a series of tripods; the secondary beam is made of round steel, and correspondingly, the top of the door-shaped hanging plate is provided with an arc-shaped flitch matched with the round steel.
In addition, the invention also provides a construction method of the steel structure dome aerial work stepped operation platform, which is characterized by comprising the following steps:
step one, preparation work: determining an arrangement area of the hoisting points according to the appearance structure and construction requirements of the dome skeleton, and determining the arrangement positions of the hoisting points on the secondary beams according to the interval arrangement heights of the secondary beams and the height between the step platform layers;
step two, manufacturing a suspender: determining the size of the suspender and the mounting positions of the middle supporting plate and the bottom supporting plate according to the step height of the step platform in the step one, and prefabricating the suspender in batches in a factory;
step three, paying off and positioning: paying off and positioning are carried out, and the installation of a lifting point is ensured to avoid a curtain wall adapter on the secondary beam;
step four, mounting a hoisting point: carrying out hanging point installation in the hanging point installation area, and hanging the door-shaped hanging plate on the secondary beam;
step five, installing two adjacent layers of suspenders: mounting two layers of suspension rods on the two layers of suspension points at the bottom or the two layers at the top;
step six, installing a table top plane truss: the plane truss installation of the stair platform is carried out on the two constructed layers of the suspension rods, the chord members are installed between the adjacent suspension rods on the same layer, the web members are installed between the corresponding suspension rods on the upper layer and the lower layer, and the plane truss is integrally formed to ensure the levelness of the plane table top;
seventhly, mounting the suspenders on the adjacent layer: next, mounting the next layer of hanger rods close to the two layers of hanger rods already mounted;
step eight, repeating the step six and the step seven until the construction of all the suspenders and the table top plane truss is completed;
ninth, installation of guard rails and scaffold boards: guard rails are arranged on two sides of each layer of the stepped platform, and scaffold boards are laid on the table top;
step ten, stair installation: stairs are respectively arranged at the bottom of the horizontal table top at the bottommost layer and between the adjacent horizontal table tops;
step eleven, overall quality inspection and acceptance: carry out quality control to whole platform structure, ensure that the installation is firm, so far, the construction is accomplished.
Compared with the prior art, the invention has the beneficial effects that: the lifting point connecting plate does not need to be welded on the main structure, the construction platform can be arranged in a staggered mode according to the height change of the dome, and cutting can be avoided when the construction platform is detached.
Compared with the prior art, the invention has the technical advantages that:
1. aiming at the characteristics of a large-span dome structure, the invention provides a large-scale stepped platform, the platform surface is arranged step by step depending on the dome structure through suspenders arranged at intervals along an annular ring beam, a channel is arranged between each two stages, a worker can freely move to a position needing construction on the platform, the operation is convenient, the construction efficiency is high, and the construction problem of the large-span curved dome is effectively solved;
2. the stepped platform not only provides space for the construction of the top dome, but also reserves sufficient space for the construction of the bottom due to the design of the stepped platform along the dome curtain wall, so that the top and the bottom can be constructed simultaneously, and the construction period is greatly saved;
3. the stepped platform has flexible connection mode with the same layer, adopts the plane truss as a main supporting structure, and is provided with the guard rail, the tie rod and the like, so that the strength of the platform is further ensured; the layers are connected through a common supporting plate, and the top and the bottom are provided with reinforcing supports to be connected with a dome structure, so that the integrity of the stepped platform is effectively ensured, and the construction safety is ensured;
4. the hoisting point is a welding-free hoisting point, the installation and the dismantling construction are convenient, and the damage to the finished engineering during the later dismantling is avoided; all components are prefabricated in factories and are connected by bolts on site;
in conclusion, the steel structure dome high-altitude construction platform is novel in design, the standard parts are combined and disassembled quickly, the defects that the construction platform formed by welding the traditional suspension rods is complicated in erection or disassembly operation and influences the engineering progress, welding spots need to be repaired at the positions where the welding spots are removed in the later stage of the engineering, manpower and material resources are wasted, the construction cost is increased are overcome, the problem that the dome structure cannot be constructed in high altitude in the traditional process is solved, the economic benefit is remarkable by adopting the construction method, the scaffold lease cost can be effectively saved, and 28 yuan/m can be saved by calculating the forward projection area2And the construction period is saved by about 90 days.
Drawings
FIG. 1 is a schematic overall structure diagram of a steel structure dome aerial work stepped operating platform related to the invention;
FIG. 2 is a schematic bottom view of the steel structure dome aerial work stepped operating platform according to the present invention;
FIG. 3 is a schematic sectional structure view of a steel structure dome aerial work stepped operating platform related to the invention;
FIG. 4 is a partial three-dimensional structure schematic diagram of a steel structure dome aerial work stepped operating platform related to the invention;
FIG. 5 is a partial view of I in FIG. 4;
FIG. 6 is a schematic sectional view taken along line A-A of FIG. 5;
FIG. 7 is a schematic sectional view taken along line B-B in FIG. 5;
FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 5;
FIG. 9 is a schematic cross-sectional view taken along line D-D of FIG. 8;
fig. 10 is a schematic view of a ladder according to the present invention.
Reference numerals: 1-dome framework, 1.1-main beam, 1.2-secondary beam, 1.3-central ring beam, 2-hanging point, 2.1-door-shaped hanging plate, 3 hanging rod, 3.1-main body rod, 3.2-middle supporting plate, 3.3-bottom supporting plate, 3.4-H-shaped connecting plate, 4-step platform, 4.1-chord rod, 4.2-web rod, 4.3-scaffold plate, 4.4-central platform, 4.5-annular platform, 5-connecting plate and 6-ladder stand.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The invention is further described below with reference to the accompanying drawings.
At present, the domestic economy is rapidly developed, the construction industry is developed day by day, and the number of special-shaped buildings is continuously increased along with the continuous improvement of the construction level. However, in the construction process of graceful modeling, some construction difficulties inevitably occur, and in order to achieve the scheme of designers and reduce the construction cost, the innovation and the continuous improvement on the construction process are required to achieve the aim. The construction main structure that this embodiment relates to is steel construction dome type, joins externally glass curtain wall, and high altitude construction if use conventional scaffold will occupy the indoor space longer time, can't satisfy the time limit for a project requirement. And the common hanging platform can not make an arch effect. Through scientific and technological customs such as BIM scheme simulation of project, the cascaded hanging platform construction method of steel construction dome has been researched and developed, has compensatied conventional scaffold frame and construction platform's not enough. The method reaches the international advanced level through the identification of relevant experts of the joint committee for science and technology work of the building industry in Beijing.
The technical scheme adopted by the invention for solving the technical problems is as follows: the hanger rod is made of rectangular steel pipes, T-shaped connecting plates are welded to two sides of the top end of each rectangular steel pipe, and the hanger rods are connected with the ring plates through bolts. And supporting plates are respectively arranged on the middle part and the bottom part of the suspender according to the elevation of the platform. And welding a connecting plate on the supporting plate according to the angle of the horizontal beam of the platform, wherein the connecting plate is connected with the horizontal beam through a bolt. The aim of arranging the construction platform in a staggered manner and avoiding cutting during dismantling is achieved. The construction method aims at a large-span arch structure, adopts a step type hanging platform, and connects all platforms through stairs, so that the operating platform not only meets the installation requirement of high-altitude operation, but also meets the requirement of small space occupation rate.
As shown in fig. 1-4, a steel structure dome aloft work stepped operation platform is hung at the bottom of a dome framework 1, the dome framework 1 comprises a central ring beam 1.3, main beams 1.1 and secondary beams 1.2, the central ring beam 1.3 is arranged at the center of the top of the dome framework 1, the main beams 1.1 are uniformly and radially arranged from the central ring beam 1.3 to the periphery of the bottom, the secondary beams 1.2 are horizontally arranged between the adjacent main beams 1.1 in a layered manner to form a multilayer annular closed structure with different heights, in the embodiment, the dome framework 1 is a spherical framework, the center of the top is a plane, and the central ring beam is arranged around the spherical framework;
as shown in fig. 5, the operating platform comprises lifting points 2, lifting rods 3 and a step platform 4, wherein the lifting points 2 are arranged annularly along a secondary beam 1.2 at intervals in a layered manner and comprise door-shaped hanging plates 2.1, and the door-shaped hanging plates 2.1 are hung on the secondary beam 1.2; the suspender 3 is vertically arranged corresponding to the suspension point and comprises a main body rod 3.1, a middle supporting plate 3.2 and a bottom supporting plate 3.3.
As shown in fig. 6 and 7, a preformed hole is formed in the middle supporting plate 3.2, and the middle supporting plate is horizontally sleeved outside the main body rod 3.1 and fixedly connected with the main body rod 3.1; the bottom supporting plate 3.3 is horizontally welded at the bottom of the main body rod 3.1; in the two adjacent layers of the hanger rods 3, the middle supporting plate 3.2 of the hanger rod at the lower layer is arranged at the same height as the bottom supporting plate 3.3 of the hanger rod at the upper layer; the connecting mode of the middle supporting plate 3.2 and the main body rod 3.1 is welding, or the two sides of the top and the bottom of the middle supporting plate 3.2 are both provided with clamps, so that the height of the middle supporting plate 3.2 on the main body rod 3.1 can be adjusted; only the bottom supporting plate 3.3 is arranged on the suspension rods 3 at the topmost layer and the bottommost layer; the middle supporting plate 3.2 and the bottom supporting plate 3.3 are rectangular plates with equal size, and the side length of the rectangular plates can be 10-30 times that of a square tube of the hanger rod 3.
As shown in fig. 8 and 9, the top of the main body rod 3.1 is fixedly connected with an H-shaped connecting plate 3.4, the H-shaped connecting plate 3.4 is transversely arranged on the inner side of the bottom of the door-shaped hanging plate 2.1, and two side plates of the H-shaped connecting plate are respectively attached to and fixedly connected with two wing plates of the door-shaped hanging plate 2.1; the H-shaped connecting plate 3.4 is of an integral structure or a split structure; when the integrated structure is adopted, the two side plates are respectively connected with the two wing plates of the door-shaped hanging plate 2.1 through bolts, the web plate in the middle is inserted into the open slot at the top of the main body rod 3.1 from top to bottom, and the connecting seam is fully welded and fixed; when for the components of a whole that can function independently structure, including two T shaped plates and the middle plane board, the plane board is vertical to be inlayed and to be established at main part pole 3.1 top and rather than full weld fixed, and the both sides are stretched out main part pole 3.1 both sides and are formed connecting portion, and the web of two T shaped plates corresponds one side connecting portion welded fastening respectively.
The main body rod 3.1 is a square tube, and the lowest clear height of the main body rod and the dome framework is not lower than 1.5 m; only a bottom supporting plate 3.3 is arranged on the suspension rod 3 at the innermost circle away from the center of the dome, and a supporting beam is arranged between the bottom of the suspension rod and a central steel beam of the dome for reinforcement; and only a bottom supporting plate 3.3 is arranged on the outermost suspension rod 3 away from the center of the dome, and a reinforcing support is arranged between the bottom of the suspension rod and the keel of the peripheral curtain wall.
As shown in fig. 2 and 10, the stepped platform 4 comprises a central platform 4.4 and a series of annular platforms 4.5 arranged in a stepped manner around the periphery of the central platform 4.4; the central platform 4.4 is arranged at the bottom of the central gird 1.3 and is formed by surrounding top layer suspenders which are hung at the bottom of the central gird 1.3 at intervals, bottom supporting plates 3.3 are arranged at the bottoms of the top layer suspenders, steel beams are arranged between the bottom supporting plates 3.3 in a crossed mode to form a central truss, and therefore the central platform 4.4 is formed; the annular platform 4.5 is a horizontal annular truss which changes from high to low gradient and is arranged between the adjacent layers of suspenders 3, one side of the horizontal annular truss is fixedly connected with the bottom supporting plate 3.3 of the upper layer of suspenders 3, and the other side of the horizontal annular truss is fixedly connected with the middle supporting plate 3.2 of the lower layer of suspenders 3.
The horizontal annular truss comprises chords 4.1 at two sides and web members 4.2 in the middle; the chord members 4.1 are arranged between the middle supporting plates 3.2 or the bottom supporting plates 3.3 of two adjacent main body rods 3.1 on the same layer, and the end parts are respectively and correspondingly fixedly connected; one end of the web member 4.2 is fixedly connected with the bottom support plate 3.3 of the upper layer suspender 3, and the other end is fixedly connected with the middle support plate 3.2 of the lower layer suspender 3; the chord 4.1 or the web member 4.2 is fixedly connected with the middle supporting plate 3.2 or the bottom supporting plate 3.3 through the connecting plate 5; the connecting plate 5 is a plane plate or a right-angle plate, is vertically welded on the middle supporting plate 3.2 or the bottom supporting plate 3.3 when being the plane plate and is connected with the end part bolt of the chord 4.1 or the web member 4.2, one side of the connecting plate is connected with the middle supporting plate 3.2 or the bottom supporting plate 3.3 through the bolt when being the right-angle plate, and the other side of the connecting plate is connected with the end part bolt of the chord 4.1 or the web member 4.2. The secondary beam 1.2 is an annular ring beam; a series of annular platforms 4.5 are co-fabricated to form the stepped platform 4.
The height of the step platform 4 is gradually reduced from the top center of the dome to the periphery of the bottom, and the step platform is continuously arranged in layers to form a construction surface. A stair is arranged between the horizontal table top at the bottommost layer and the ground; a ladder stand is arranged between the horizontal table tops of adjacent layers and is made of common fastener type scaffold materials and comprises steps and handrails. And scaffold boards 4.3 are respectively laid on the step platforms 4, and guard rails are arranged on two sides of each layer of horizontal table top. The guard rail comprises upright posts on two sides, a cross rod between the upright posts and a counter-pull rod arranged at the bottom of the horizontal table board and the upright posts on two sides of the drawknot.
In material selection, the chord members 4.1 and the web members 4.2 adopt channel steel, square steel or angle steel, the web members 4.2 are arranged in a Z shape, and the planar truss is divided into a series of tripods; the secondary beam 1.2 is made of round steel, and correspondingly, the top of the door-shaped hanging plate 2.1 is provided with an arc-shaped flitch matched with the round steel.
In the construction of the steel structure dome aerial work stepped operation platform, the whole manufacturing process flow is as follows:
drawing design → component processing → hanging point installation → suspender installation → horizontal truss installation → railing installation → springboard laying → stair installation → acceptance → use, specifically comprises the following steps:
step one, preparation work: determining an arrangement area of the lifting points 1 according to the appearance structure and construction requirements of the dome skeleton 1, and determining the arrangement position of the lifting points 1 on the secondary beam 1.2 according to the interval arrangement height of the secondary beam 1.2 and the interlayer height of the step platform 4; avoid the curtain adaptor when arranging the hoisting point, and the hoisting point distance sets up in order, and the specification is unified, and horizontal truss stable in structure.
According to the requirement, the drawing design must meet several conditions:
(1) satisfies 1KN/m2The construction load requirement of (1);
(2) the hoisting point can not be welded on the original structure due to the effective fruit requirement of the original structure;
(3) a glass curtain wall adapter is arranged above the original structure, and a lifting point needs to avoid the adapter;
(4) on the premise of occupying the lower space as little as possible, the working space ensures the net height of 1.5 m;
(5) stable in structure, can not rock, and install and demolish and reduce welding operation.
Step two, manufacturing the suspender 2: determining the size of the suspender 2 and the installation positions of the middle supporting plate 3.2 and the bottom supporting plate 3.3 according to the step height of the step platform 4 in the step one, and prefabricating the suspender 2 in batches in a factory; and simultaneously processing other components, drawing a component processing diagram according to a design drawing, and sending the component processing diagram to a processing plant. The manufacturer sorts and packages the components according to the drawing and sends the components to the site, and the identification is clear and convenient to install.
Step three, installing the hoisting point 1: carrying out lifting point installation in a lifting point installation area, and hanging a door-shaped hanging plate 2.1 on a secondary beam 1.2; the method includes the steps that firstly, an ascending vehicle is used for conveying operating personnel to the position near a hanging point installation position, the position is accurate through measurement and correction, and a curtain wall adaptor is avoided. The ring plate is sleeved on the original main structure, and the next step of boom installation is started.
Step four, paying off and positioning: and (4) paying off and positioning, and ensuring that the middle supporting plate 3.2 of the lower-layer suspender and the bottom supporting plate 3.3 of the upper-layer suspender are arranged in a coplanar manner.
Step five, installing the two adjacent layers of suspenders 2: two layers of suspension rods 2 are arranged on the two layers of suspension points at the bottom or the two layers at the top; the hanger bar is connected to the ring plate by 4M16 bolts, which are tightened and then adjusted to be perpendicular to the ground. The hanger rods are installed from bottom to top, and the horizontal truss can be installed after the two layers of hanger rods are installed.
Step six, installing a table top plane truss: the plane truss installation of the stair platform 4 is carried out on the two constructed layers of the suspension rods 2, the chord members 4.1 are installed between the adjacent suspension rods on the same layer, the web members 4.2 are installed between the corresponding suspension rods 2 on the upper layer and the lower layer, and the plane truss is integrally formed to ensure the levelness of the plane table top; specifically, install horizontal beam when two-layer jib adjustment targets in place, assigned position is installed according to the serial number to horizontal beam, is connected through the connecting plate on bolt and the jib layer board, and the bolt-up installs the level earlier to the crossbeam, installs oblique crossbeam again, forms truss structure.
Seventhly, mounting the suspender 2 of the adjacent layer: the next layer of hanger bars 2 is installed next to the two layers of hanger bars 2 already installed.
And step eight, repeating the step six and the step seven until the construction of all the suspenders 2 and the table top plane truss is finished.
Ninth, installing a guard rail and a scaffold board 4.3: guard rails are arranged on two sides of each layer of the stepped platform 4, and a scaffold board 4.3 is laid on the platform surface; after the platform support is installed, 48.3-3.0 steel pipes are laid on the upper portion of the horizontal channel steel at intervals of 1.5m, and the double-strand No. 12 binding wires are adopted for binding and fixing. 3000X 200X 50 steel cantilever plates are laid on the steel pipes. And a 180 x 15mm wood skirting board is arranged on the upper part of the springboard. And two horizontal guardrails are arranged at positions 600mm and 1200mm away from the top of the springboard, and 48.3 x 3.0 steel pipes are adopted. The gangway is installed firstly, and then the gangway is paved, the gangway is not directly paved on the horizontal truss, a layer of scaffold is arranged according to the length of the gangway, and the gangway can be stably fastened.
Step ten, stair installation: stairs are respectively arranged at the bottom of the horizontal table top at the bottommost layer and between the adjacent horizontal table tops;
step eleven, overall quality inspection and acceptance: carry out quality control to whole platform structure, ensure that the installation is firm, so far, the construction is accomplished. The inspection and acceptance should be carried out in stages, whether the upper, middle and lower parts of the suspender are welded firmly or not is firstly inspected when the material enters a field, and whether the hoisting point is installed firmly or not is inspected before the horizontal beam is installed. A full inspection should be performed before the platform is put into use. The examination items include: whether the springboard is firmly bound, whether the cross beam is fastened in place, whether the handrail is arranged according to requirements, whether the channel is arranged completely, whether the skirting board meets the requirements and the like.
Application example 1
A single hundred-bird garden 201 in a second project of a certain world-wide movie city mark section is a dome-type steel structure with the span of 60 meters and the height of 21 meters. The outer facing is a glass curtain wall, and an electromechanical pipeline, a decorative component and the like attached to the main structure are arranged at the high altitude. Because of the construction cycle span is longer, if use conventional scaffold to set up from ground, will occupy the inside more than one year time of dome, lead to unable indoor hardcover operation. By applying the steel structure dome stepped hanging platform construction method, the engineering construction progress is accelerated, the construction quality is ensured, the cost is saved, and the expected target is realized.
Application example two
The area of the warfare of the Disney Bay project-TC 503 monomer sunken ship Bay in a certain place is 15279m2, the height of a high-span building is 20.6 m, and the height of the low-span building is 10.04 m. The structural form is steel structural framework, and is a dark riding type monomer. A large number of electromechanical pipelines and equipment are arranged at high indoor positions, the construction period is long, and cross operation exists with indoor decoration construction. In order to solve the problems, the engineering applies a steel structure dome stepped hanging platform construction method. The method has the advantages of obtaining better economic benefit and shortening the construction period.
The hoisting point is a welding-free hoisting point, the installation and the dismantling construction are convenient, and the damage to the finished engineering during the later dismantling is avoided; all components are prefabricated in factories and are connected by bolts on site; the horizontal truss is designed, so that the device is safe, stable and free of shaking; the invention is suitable for large-span dome steel structures, arched steel structures and special-shaped steel structures with large height difference variation, and is suitable for projects needing to build high-altitude platforms during high-altitude operation. The contents of high-altitude operation mainly comprise glass curtain wall installation, electromechanical pipeline installation, decoration and fitment and the like, and the construction method can be used.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a cascaded operation platform of steel construction dome high altitude construction which characterized in that: the dome framework is hung at the bottom of the dome framework (1), the dome framework (1) comprises a central ring beam (1.3), main beams (1.1) and secondary beams (1.2), the central ring beam (1.3) is arranged at the center of the top of the dome framework (1), the main beams (1.1) are uniformly and radially arranged from the central ring beam (1.3) to the periphery of the bottom, and the secondary beams (1.2) are horizontally arranged between the adjacent main beams (1.1) in a layered mode to form a multilayer annular closed structure with different heights;
the operating platform comprises a lifting point (2), a lifting rod (3) and a step platform (4);
the lifting points (2) are arranged on the secondary beam (1.2) and the central ring beam (1.3) and are annularly arranged along the secondary beam (1.2) or the central ring beam (1.3) at intervals in a layered mode, and the curtain wall adaptor is avoided; comprises a door-shaped hanging plate (2.1), wherein the door-shaped hanging plate (2.1) is hung on a secondary beam (1.2);
the hanger rod (3) is vertically arranged corresponding to a hanging point and comprises a main body rod (3.1), a middle supporting plate (3.2) and a bottom supporting plate (3.3), the top of the main body rod (3.1) is fixedly connected with an H-shaped connecting plate (3.4), the H-shaped connecting plate (3.4) is transversely arranged on the inner side of the bottom of the door-shaped hanging plate (2.1), and two side plates of the H-shaped connecting plate are respectively attached to and fixedly connected with two wing plates of the door-shaped hanging plate (2.1); the middle supporting plate (3.2) is provided with a preformed hole which is horizontally sleeved outside the main body rod (3.1) and fixedly connected with the main body rod (3.1); the bottom supporting plate (3.3) is horizontally welded at the bottom of the main body rod (3.1); in the two adjacent layers of the hanging rods (3), the middle supporting plate (3.2) of the lower layer of the hanging rods and the bottom supporting plate (3.3) of the upper layer of the hanging rods are arranged at the same height;
the stepped platform (4) comprises a central platform (4.4) and a series of annular platforms (4.5) arranged in a stepped manner around the central platform (4.4);
the central platform (4.4) is arranged at the bottom of the central girt (1.3) and is formed by surrounding top layer suspenders which are hung at the bottom of the central girt (1.3) at intervals, bottom supporting plates (3.3) are arranged at the bottoms of the top layer suspenders, steel beams are arranged between the bottom supporting plates (3.3) in a crossed mode to form a central truss, and therefore the central platform (4.4) is formed;
the annular platform (4.5) is a horizontal annular truss with gradient change from high to low, and is arranged between the adjacent layers of the suspenders (3), one side of the horizontal annular truss is fixedly connected with a bottom supporting plate (3.3) of the upper layer of the suspenders (3), and the other side of the horizontal annular truss is fixedly connected with a middle supporting plate (3.2) of the lower layer of the suspenders (3);
in the step platforms (4), a ladder stand (6) is arranged between the adjacent horizontal table surfaces; the height of the step platform (4) is gradually reduced from the center of the top of the dome to the periphery of the bottom of the dome, and the step platform is continuously arranged in layers to form a construction surface.
2. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: the horizontal annular truss comprises chord members (4.1) at two sides and a web member (4.2) in the middle; the chord members (4.1) are arranged between the middle supporting plates (3.2) or the bottom supporting plates (3.3) of two adjacent main body rods (3.1) on the same layer, and the end parts are respectively and correspondingly fixedly connected; one end of the web member (4.2) is fixedly connected with the bottom support plate (3.3) of the upper layer suspender (3), and the other end is fixedly connected with the middle support plate (3.2) of the lower layer suspender (3).
3. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: the H-shaped connecting plate (3.4) is of an integral structure or a split structure; when the structure is integrated, two side plates of the structure are respectively connected with two wing plates of the door-shaped hanging plate (2.1) through bolts, and a middle web plate is inserted into a slot at the top of the main body rod (3.1) from top to bottom and is fixed by full welding; when the split type structure is adopted, the split type structure comprises two T-shaped plates, and webs of the T-shaped plates are correspondingly welded and fixed on two side surfaces of the top of the main body rod (3.1).
4. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 2, is characterized in that: the chord member (4.1) or the web member (4.2) is fixedly connected with the middle supporting plate (3.2) or the bottom supporting plate (3.3) through a connecting plate (5); the connecting plate (5) is a plane plate or a right-angle plate, is vertically welded on the middle supporting plate (3.2) or the bottom supporting plate (3.3) when being a plane plate, is connected with the end part of the chord member (4.1) or the web member (4.2) through bolts, is connected with the middle supporting plate (3.2) or the bottom supporting plate (3.3) through bolts at one side of the right-angle plate, and is connected with the end part of the chord member (4.1) or the web member (4.2) through bolts at the other side of the right-angle plate.
5. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: the middle supporting plate (3.2) and the main body rod (3.1) are connected in a welding mode, or annular clamping bands are arranged on the two sides of the top and the bottom of the middle supporting plate (3.2) respectively to achieve adjustable connection.
6. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: the ladder stand (6) comprises steps and escalators on two sides, and the tops and bottoms of the steps are fixedly connected with the plane trusses of the upper layer and the lower layer respectively.
7. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: the hanger rod (3) is a square tube; only a bottom supporting plate (3.3) is arranged on the suspension rod (3) at the innermost circle away from the center of the dome, and a supporting beam is arranged between the bottom of the suspension rod and a steel beam at the center of the dome for reinforcement; and a bottom supporting plate (3.3) is only arranged on the outermost suspension rod (3) far away from the center of the dome, and a reinforcing support is arranged between the bottom of the suspension rod and a peripheral curtain wall keel.
8. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 1, is characterized in that: scaffold boards (4.3) are respectively laid on the step platforms (4), and guard rails are arranged on two sides of each layer of horizontal table top; the guard rail comprises upright posts on two sides, a cross rod between the upright posts and a counter pull rod arranged at the bottom of the horizontal table board and the upright posts on two sides of the drawknot.
9. The stepped operating platform for high-altitude operation of the steel structure dome according to claim 2, is characterized in that: the chord members (4.1) and the web members (4.2) are made of channel steel, square steel or angle steel, the web members (4.2) are arranged in a Z shape, and the planar truss is divided into a series of tripods; the secondary beam (1.2) is made of round steel, and correspondingly, the top of the door-shaped hanging plate (2.1) is an arc-shaped pasting plate matched with the round steel.
10. The construction method of the steel structure dome aerial work stepped operating platform as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
step one, preparation work: determining an arrangement area of the hoisting points (1) according to the appearance structure and construction requirements of the dome framework (1), and determining the arrangement position of the hoisting points (1) on the secondary beams (1.2) according to the interval arrangement height of the secondary beams (1.2) and the interlayer height of the stepped platform (4);
step two, manufacturing a suspender (2): determining the size of the suspender (2) and the mounting positions of the middle supporting plate (3.2) and the bottom supporting plate (3.3) according to the step height of the step platform (4) in the step I, and prefabricating the suspender (2) in batches in a factory;
step three, paying off and positioning: paying off and positioning are carried out, and the hanging point (1) is ensured to be installed to avoid a curtain wall adapter on the secondary beam;
step four, installing the hoisting point (1): the hoisting point installation is carried out in the hoisting point installation area, and the door-shaped hanging plate (2.1) is hung on the secondary beam (1.2);
fifthly, installing the two adjacent layers of suspenders (2): two layers of suspension rods (2) are arranged on the two layers of suspension points at the bottom or the two layers at the top;
step six, installing a table top plane truss: the plane truss installation of the stair platform (4) is carried out on the two layers of the hanger rods (2) which are constructed, the chord members (4.1) are installed between the adjacent hanger rods on the same layer, the web members (4.2) are installed between the corresponding hanger rods (2) on the upper layer and the lower layer, the plane truss is integrally formed, and the integrity of the stair platform (4) is ensured;
seventhly, installing the suspender (2) at the adjacent layer: next, the next layer of hanging rods (2) is installed next to the two layers of hanging rods (2) which are already installed;
step eight, repeating the step six and the step seven until the construction of all the suspenders (2) and the table-board plane truss is completed;
ninth, mounting of the guard rail and the scaffold board (4.3): guard rails are arranged on two sides of each layer of the stepped platform (4), and a scaffold board (4.3) is laid on the table top;
step ten, stair installation: stairs are respectively arranged at the bottom of the horizontal table top at the bottommost layer and between the adjacent horizontal table tops;
step eleven, overall quality inspection and acceptance: carry out quality control to whole platform structure, ensure that the installation is firm, so far, the construction is accomplished.
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| CN202010721435.0A CN112663927B (en) | 2020-07-24 | 2020-07-24 | Steel structure dome aerial work stepped operation platform and construction method thereof |
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| KR102426266B1 (en) * | 2021-08-11 | 2022-07-29 | (주)대도시스템 | Outer scaffolding system construction method for tank |
| CN113845030B (en) * | 2021-10-14 | 2024-04-26 | 中国建筑第八工程局有限公司 | Lifting method of stepped steel truss |
| CN113914647B (en) * | 2021-12-13 | 2022-03-01 | 江苏鸿恩智能科技有限公司 | Circular top type building circumferential transverse moving climbing frame chain and assembly thereof |
| CN114250964B (en) * | 2021-12-27 | 2023-06-23 | 上海建工集团股份有限公司 | Supporting device for dome roof construction |
| CN114704016B (en) * | 2022-03-09 | 2024-05-10 | 中建八局新型建造工程有限公司 | Construction method of large-inclination-angle inclined roof profiled steel sheet with dome structure |
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| US8225904B2 (en) * | 2009-08-12 | 2012-07-24 | Lennie Davis | Apparatus for supporting a worker on an upper chord of a roof truss |
| CN104594617B (en) * | 2015-01-26 | 2017-03-22 | 中国建筑一局(集团)有限公司 | Suspension cable scaffold for construction of high-rise roof structure |
| US20160312481A1 (en) * | 2015-04-27 | 2016-10-27 | Rolling Easy Platforms, LLC | Work platform rail system |
| CN205875666U (en) * | 2016-06-24 | 2017-01-11 | 中国建筑第六工程局有限公司 | A platform suspends in midair that is used for building eaves oral area position to be under construction |
| CN107916772A (en) * | 2017-11-22 | 2018-04-17 | 中冶建工集团有限公司 | A kind of hanging-type construction platform and installation method for curved surface ceiling construction |
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