阅读说明：本技术 装配式可调悬挑工字钢刚性拉杆外脚手架施工方法 (Construction method of assembled type adjustable overhanging I-steel rigid pull rod outer scaffold ) 是由 覃春成 覃祚德 韦庆伟 韦世团 韦慧春 樊慧 于 2021-07-01 设计创作，主要内容包括：本发明提供的装配式可调悬挑工字钢刚性拉杆外脚手架施工方法,包括：构件定型化制作,施工准备,套管预埋,连接钢板预埋；悬挑层结构混凝土浇筑,型钢支座安装,钢管脚手架搭设,搭设立杆、水平杆、扫地杆、连墙件,套筒预埋,可调拉杆安装,外脚手架使用以及拆除；本发明提供的装配式可调悬挑工字钢刚性拉杆外脚手架施工方法,采用可调拉杆,其上节拉杆和型钢支座的端部通过穿墙螺栓与墙侧面连接,墙内预埋套管,型钢支座无需埋入剪力墙处,拉杆拉结也无需在模板上开洞预埋拉环,不存在后期补洞过程,消除因补洞引起外墙渗漏水隐患,保证工程质量。(The invention provides a construction method of an assembled type adjustable cantilever I-steel rigid pull rod outer scaffold, which comprises the following steps: the method comprises the following steps of (1) shaping and manufacturing a component, preparing for construction, embedding a sleeve and embedding a connecting steel plate; concrete pouring of a cantilever layer structure, installation of a profile steel support, erection of a steel pipe scaffold, erection of a vertical rod, a horizontal rod, a floor sweeping rod and a wall connecting piece, pre-embedding of a sleeve, installation of an adjustable pull rod, and use and dismantling of an external scaffold; the construction method of the assembled type adjustable cantilever I-steel rigid pull rod external scaffold provided by the invention adopts the adjustable pull rod, the upper section pull rod and the end part of the profile steel support are connected with the side surface of the wall through the wall-through bolt, the sleeve is embedded in the wall, the profile steel support does not need to be embedded into a shear wall, the pull rod is tied without opening a hole on a template and embedding a pull ring, the later hole repairing process is avoided, the hidden danger of water leakage of the outer wall caused by hole repairing is eliminated, and the engineering quality is ensured.)

1. The construction method of the assembled type adjustable cantilever I-steel rigid pull rod outer scaffold is characterized by comprising the following steps:

the method comprises the following steps of (1) shaping and manufacturing a member, and determining a steel member connecting node and size;

construction preparation, sleeve embedding and connecting steel plate embedding;

pouring the concrete of the cantilever layer structure, wherein during construction, walls and columns are poured firstly, then horizontal floor slabs and beams are poured, and maintenance is carried out after pouring is finished;

installing the profile steel support, namely inserting a through-wall bolt into the embedded sleeve, screwing a nut on the inner side of the cylinder structure, arranging a gasket between the nut and the cylinder structure, aligning a bolt hole at the top end of the profile steel support to the through-wall bolt for embedding, adding the gasket at the top end of the profile steel support, and screwing the gasket by using the nut;

erecting a steel pipe scaffold, namely erecting a vertical rod, a horizontal rod, a floor sweeping rod and a wall connecting piece;

pre-burying a sleeve, pouring upper-layer structure concrete of the overhanging layer scaffold after pre-burying is finished, pouring, tamping and curing, and constructing the same with the overhanging layer structure concrete;

the adjustable pull rod is installed, an upper pull rod and a lower pull rod are connected through a sleeve, the length of the upper pull rod and the length of the lower pull rod are adjusted to be proper, then the upper pull rod and the lower pull rod are fastened respectively and rotated to be in a pre-tightening state, finally, a pin bolt penetrates through a reserved hole at the picking-out end of the section steel support, and a cotter pin is used at the end, through which the pin bolt penetrates, of the steel plate, so that the lower pull rod and the section steel support are connected and fastened;

the outer scaffold is used and dismantled, and the outer scaffold of the last layer is set up after the outer scaffold is installed, and the dismantling is carried out according to the sequence of firstly taking and then dismantling and then taking and firstly dismantling.

2. The construction method of the assembled type adjustable cantilever I-steel rigid pull rod outer scaffold according to claim 1, wherein the installation step of the section steel support further comprises the following steps:

the top support is temporarily erected on the lower portion, one end of the profile steel support is placed on the temporary top support before the adjustable pull rod is installed, the other end of the profile steel support is connected with a wall, a beam horizontal sleeve fixing device is adopted during connection, and the protruding end of the profile steel support is welded with a reinforcing steel bar of about 10cm, so that the vertical rod is fixed.

3. The construction method of the assembled type adjustable cantilever I-steel rigid pull rod outer scaffold according to claim 1 or 2, wherein the steel pipe scaffold erecting step further comprises:

and building a handrail and laying a steel bar mesh on the standard layer, and hardening and isolating the bottommost layer by using a template.

4. The construction method of the assembled type adjustable cantilever I-steel rigid tie bar outer scaffold according to claim 1 or 2, wherein the dismantling step further comprises:

the pull connecting pieces are dismantled layer by layer, the height difference of subsection dismantling is not more than two steps, if the height difference is more than two steps, the wall connecting piece is additionally arranged for reinforcement, the wall connecting piece and the transverse diagonal brace are arranged at two ends of the external scaffold which is not dismantled for reinforcement, and after the scaffold body is completely dismantled, the adjustable pull rod is dismantled; and finally, dismantling the profile steel support, wherein the profile steel support welded with the embedded steel plate at the corner is dismantled by gas cutting.

Technical Field

The invention belongs to the technical field of scaffold construction, and particularly relates to a construction method of an assembled type adjustable overhanging I-steel rigid pull rod outer scaffold.

Background

With the rapid development of the urbanization process, high-rise buildings are more and more common in urban construction, and overhanging scaffolds are widely used as safety protection measures and operation platforms. Traditional shaped steel scaffold frame of encorbelmenting generally adopts U shaped steel pull ring or anchor bolt to fix shaped steel on concrete beam slab structure, and the fixed segment length of shaped steel should not be less than the 1.25 times of the length of encorbelmenting, and the shaped steel demand is great, and has the later stage mends the hole problem and leads to the outer wall percolating water problem to send out more.

The invention patent with the publication number of CN111335618A discloses a pulling system of an assembled suspended scaffold, which comprises a plurality of cantilever beams and a scaffold erected on the cantilever beams, wherein a steel bar pull rod for pulling the outer ends of the cantilever beams and an upper-layer building structure beam is obliquely arranged on each cantilever beam; the upper end of reinforcing bar pull rod is connected with superstructure structure roof beam through last coupling assembling, and the lower extreme is connected with the cantilever beam through lower coupling assembling, is provided with the turn buckle on the reinforcing bar pull rod.

It can be seen that in the prior art, the pull rod of the scaffold still needs to be provided with a hole on the template and a pull ring is embedded, and the hole needs to be repaired later, so that hidden dangers are increased.

Disclosure of Invention

The invention aims to provide a construction method of an assembled type adjustable cantilever I-steel rigid pull rod outer scaffold, and aims to solve the problem that in the prior art, when pull rods of a scaffold are pulled, holes need to be formed in a template, pull rings need to be embedded in the template, and hidden danger of an outer wall is caused.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:

the invention provides a construction method of an assembled type adjustable cantilever I-steel rigid pull rod outer scaffold, which comprises the following steps:

the method comprises the following steps of (1) shaping and manufacturing a member, and determining a steel member connecting node and size;

construction preparation, sleeve embedding and connecting steel plate embedding;

pouring the concrete of the cantilever layer structure, wherein during construction, walls and columns are poured firstly, then horizontal floor slabs and beams are poured, and maintenance is carried out after pouring is finished;

installing the profile steel support, namely inserting a through-wall bolt into the embedded sleeve, screwing a nut on the inner side of the cylinder structure, arranging a gasket between the nut and the cylinder structure, aligning a bolt hole at the top end of the profile steel support to the through-wall bolt for embedding, adding the gasket at the top end of the profile steel support, and screwing the gasket by using the nut;

erecting a steel pipe scaffold, namely erecting a vertical rod, a horizontal rod, a floor sweeping rod and a wall connecting piece;

pre-burying a sleeve, pouring upper-layer structure concrete of the overhanging layer scaffold after pre-burying is finished, pouring, tamping and curing, and constructing the same with the overhanging layer structure concrete;

installing an adjustable pull rod, namely connecting an upper section pull rod and a lower section pull rod through a sleeve, adjusting the length of the upper section pull rod and the lower section pull rod to a proper length, then respectively fastening the upper section pull rod and the lower section pull rod, rotating the upper section pull rod and the lower section pull rod to a pre-tightening state, finally penetrating a pin bolt through a reserved hole at the picking-out end of the section steel support, and using a cotter pin at the end of the pin bolt penetrating a steel plate to connect and fasten the lower section pull rod and the section steel support;

the outer scaffold is used and dismantled, and the outer scaffold of the last layer is set up after the outer scaffold is installed, and the dismantling is carried out according to the sequence of firstly taking and then dismantling and then taking and firstly dismantling.

Preferably, the mounting step of the section steel support further comprises:

the top support is temporarily erected on the lower portion, one end of the profile steel support is placed on the temporary top support before the adjustable pull rod is installed, the other end of the profile steel support is connected with a wall, a beam horizontal sleeve fixing device is adopted during connection, and the protruding end of the profile steel support is welded with a reinforcing steel bar of about 10cm, so that the vertical rod is fixed.

Preferably, the steel pipe scaffold erecting step further comprises:

and building a handrail and laying a steel bar mesh on the standard layer, and hardening and isolating the bottommost layer by using a template.

Preferably, the removing step further comprises:

the pull connecting pieces are dismantled layer by layer, the height difference of subsection dismantling is not more than two steps, if the height difference is more than two steps, the wall connecting piece is additionally arranged for reinforcement, the wall connecting piece and the transverse diagonal brace are arranged at two ends of the external scaffold which is not dismantled for reinforcement, and after the scaffold body is completely dismantled, the adjustable pull rod is dismantled; and finally, dismantling the profile steel support, wherein the profile steel support welded with the embedded steel plate at the corner is dismantled by gas cutting.

The invention has the advantages that:

1. the invention provides a construction method of an assembled type adjustable cantilever I-steel rigid pull rod external scaffold, which adopts an adjustable pull rod, wherein the upper section pull rod and the end part of a profile steel support are connected with the side surface of a wall (beam) through a wall-through bolt, a sleeve is embedded in the wall (beam), the profile steel support is not required to be embedded into a shear wall, a pull ring is not required to be embedded into a template in a hole-opening manner when the pull rod is pulled, a hole-filling process in the later period is not required, the hidden danger of water leakage of an outer wall caused by hole filling is eliminated, and the engineering quality is ensured.

2. According to the construction method of the assembled type adjustable cantilever I-steel rigid pull rod outer scaffold, one end of the section steel support is connected with a wall (beam) structure through the wall-penetrating bolt (or the embedded steel plate), the cantilever support does not need to be anchored into the cantilever length which is 1.25 times, and the section steel consumption can be saved by at least 55.56%.

3. According to the construction method of the assembled type adjustable cantilever I-steel rigid pull rod outer scaffold, the section steel support and the upper section pull rod are connected with the wall (beam) structure through the embedded wall-penetrating bolts, cutting is not needed when the scaffold is disassembled except for the corner parts, and loss of the bolts is avoided; meanwhile, the disassembled adjustable pull rod can be recycled, the repeated utilization rate of the pull rod, the bolt and other components is high, and the cost is saved.

Drawings

FIG. 1 is a flow chart of a construction method of an assembled type adjustable cantilever I-steel rigid pull rod external scaffold;

FIG. 2 is a schematic view of the structural connection between the profile steel support and the column according to the present invention;

FIG. 3 is a schematic view of the connection between the upper tie bar and the column structure according to the present invention;

FIG. 4 is a schematic view of the connection between the lower tie bar and the column structure according to the present invention;

FIG. 5 is a schematic view of the connection between an adjustable tie bar and a profile steel support according to the present invention;

FIG. 6 is a schematic view of an adjustable tension rod according to the present invention;

FIG. 7 is a schematic view of the sleeve structure according to the present invention;

fig. 8 is a schematic cross-sectional view of the sleeve according to the present invention.

In the figure, 1-column structure, 2-section steel support, 3-sleeve, 4-wall bolt, 5-nut, 6-upper tie rod, 7-lower tie rod, 8-pin bolt, 9-connecting steel plate, 10-gasket, 11-external thread, 12-sleeve, 13-welding iron, 14-reinforcing steel bar, 15-inner wall and 16-internal thread.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides a construction method of an assembled type adjustable overhanging I-steel rigid pull rod outer scaffold, which comprises the following construction steps of:

the method comprises the following steps of (1) shaping and manufacturing a member, and determining a connecting node and a size of a steel member, wherein the steel member comprises a sleeve 3, a connecting steel plate 9, a profile steel support 2, a vertical rod, a horizontal rod, a sweeping rod, a wall connecting member and the like;

construction preparation, namely embedding the sleeve 3 in advance, embedding the connecting steel plate 9 in advance, wherein the embedding position is shown in figures 2 to 5; before the concrete of the cantilever floor boundary beam or the shear wall structure is poured, the position of the through-wall bolt 4 is rechecked by contrasting a profile steel layout drawing, and when the sleeve 3 is embedded, a sleeve fixing tool is used to ensure the precision of the embedded sleeve 3;

the cantilever layer structure concrete is poured in a pumping mode, when in construction, walls and columns are poured firstly, then horizontal floor slabs and beams are poured, and maintenance is carried out after pouring is finished, so that cracks are prevented, and the early strength of the concrete is improved;

installing the profile steel support 2, as shown in fig. 2, firstly inserting a through-wall bolt 4 into the embedded sleeve, screwing a nut on the inner side of the column structure 1, arranging a gasket 10 between the nut and the column structure 1, then aligning a bolt hole on the top end of the profile steel support 2 to the through-wall bolt 4 to be embedded, adding the gasket 10 on the top end of the profile steel support 2, and screwing the gasket by using the nut to further improve the stability of the profile steel support 2;

erecting a steel pipe scaffold, namely erecting a vertical rod, a horizontal rod, a floor sweeping rod and a wall connecting piece;

the sleeve 12 is pre-embedded, as shown in fig. 7 and 8, the sleeve 12 comprises a steel bar 14, a soldering iron 13 and an inner wall 15, and the inner wall 15 is further provided with an internal thread 16; after the embedding is finished, pouring upper-layer structure concrete of the overhanging layer scaffold, pouring, tamping and curing, and constructing the same overhanging layer structure concrete;

the adjustable pull rod is installed, as shown in fig. 3 to 6, the adjustable pull rod comprises an upper pull rod 6 and a lower pull rod 7, pin bolts 8 and external threads 11 are arranged at the end parts of the upper pull rod 6 and the lower pull rod 7, the upper pull rod 6 and the lower pull rod 7 are connected through a sleeve 12 and adjusted to proper lengths, then the upper pull rod 6 and the lower pull rod 7 are fastened respectively and rotated to a pre-tightening state, finally the pin bolts 8 penetrate through reserved holes at the picking-out ends of the section steel support 2, and split pins are used at the ends of the pin bolts 8, so that the pin bolts 8 are prevented from moving transversely, and the lower pull rod 7 and the section steel support 2 are connected and fastened; because the inner wall 15 of the sleeve 12 is provided with the internal thread 16, the internal thread 16 can be matched with the external thread 11 on the upper section pull rod 6 and the lower section pull rod 7, so that the upper section pull rod 6 and the lower section pull rod 7 can be telescopically adjusted in the installation process;

the outer scaffold is used and dismantled, and the outer scaffold of the last layer is set up after the outer scaffold is installed, and the dismantling is carried out according to the sequence of firstly taking and then dismantling and then taking and firstly dismantling.

In one embodiment, the section steel support mounting step further includes:

erect the top in the lower part temporarily and hold in the palm, before adjustable pull rod installation, shaped steel support one end is shelved on the support temporarily, and the other end is connected with the wall, adopts a roof beam horizontal sleeve fixing device during the connection, and shaped steel support picks out the end and welds about 10 cm's reinforcing bar to fixed pole setting, when layer structure concrete of encorbelmenting reaches calculation requirement intensity and is not less than C15, carrying out the installation of shaped steel cantilever beam, further reinforcing adjustable pull rod stability.

In one embodiment, the steel pipe scaffold erecting step further comprises:

and building a handrail and laying a steel bar mesh on the standard layer, and hardening and isolating the bottommost layer by adopting a template to prevent objects from falling to hurt people.

In one embodiment, the step of removing further comprises:

the pull connecting pieces are dismantled layer by layer, the height difference of subsection dismantling is not more than two steps, if the height difference is more than two steps, the wall connecting piece is additionally arranged for reinforcement, the wall connecting piece and the transverse diagonal brace are arranged at two ends of the external scaffold which is not dismantled for reinforcement, and after the scaffold body is completely dismantled, the pull rod is dismantled; and finally, dismantling the profile steel support, wherein the profile steel support welded with the embedded steel plate at the corner is dismantled by gas cutting.

Reference in the specification to "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in various places throughout this specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, structure, or characteristic of one or more other embodiments without limitation, as long as the combination is not logical or operational. Additionally, the various elements of the drawings of the present application are merely schematic illustrations and are not drawn to scale.

Having thus described several aspects of at least one embodiment of this invention, it is to be appreciated various alterations, modifications, and improvements will readily occur to those skilled in the art. Such alterations, modifications, and improvements are intended to be within the spirit and scope of the invention.