CN114059664A - Construction method for pivot joint inclined column of connecting system cantilever structure system - Google Patents
Construction method for pivot joint inclined column of connecting system cantilever structure system Download PDFInfo
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- CN114059664A CN114059664A CN202111189985.3A CN202111189985A CN114059664A CN 114059664 A CN114059664 A CN 114059664A CN 202111189985 A CN202111189985 A CN 202111189985A CN 114059664 A CN114059664 A CN 114059664A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 239000004567 concrete Substances 0.000 claims abstract description 49
- 230000002787 reinforcement Effects 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 43
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 36
- 230000008569 process Effects 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000010410 layer Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 239000002023 wood Substances 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 5
- 238000005094 computer simulation Methods 0.000 claims description 4
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- 238000012545 processing Methods 0.000 claims description 4
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- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 239000011120 plywood Substances 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 description 5
- 239000011150 reinforced concrete Substances 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 238000009435 building construction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/32—Columns; Pillars; Struts of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/005—Strips for covering joints between form sections, e.g. to avoid burring or spilling of laitance
Abstract
The invention discloses a construction method of a pivot node oblique column of a connecting system cantilever structure system, which comprises the steps of construction preparation, positioning and paying off, steel rib column and H steel beam installation, mechanical connection and binding of column main reinforcements, column stirrup and column template installation, concrete pouring in a steel tube, concrete pouring outside the steel tube, beam (plate) bottom die erection, penetration and connection of beam main reinforcements, beam stirrup binding, beam side die erection and plate bottom die erection, plate reinforcement binding and beam plate concrete pouring, the construction method solves the problem of the relation between steel column studs and steel rib outside, enables the frame column stirrups at multidirectional intersection joints to be processed when meeting the steel ribs, ensures that the frame beam main reinforcements smoothly pass through the steel rib columns after the frame beam main reinforcements meet the steel ribs, enables the frame beams to be not influenced at the column ends by shearing, improves the trapped construction efficiency, improves the strength of the structure and greatly reduces the construction difficulty, improves the working efficiency and obtains the maximum harvest with the least investment.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for a pivot joint inclined column of a connecting cantilever structure system.
Background
Since the century, the stiff reinforced concrete structural system is rapidly developed in high-rise buildings and becomes a structural system which is used in high-rise buildings more frequently. A stiffened reinforced concrete structure system is a combined structural member which is formed by arranging reinforcing steel bars around steel ribs and pouring concrete to enable the steel ribs and the concrete to work together. The steel ribs greatly improve the ductility of the member, so that the member has strong deformation capability, good anti-seismic performance and high bearing capacity, and has good fire resistance and corrosion resistance when a concrete-coated structure is adopted.
When a plurality of inclined columns in the structure are intersected at the same node, the inclined column construction method is used as a pivot of a connecting cantilever structure system, is not only a stress point for bearing various loads, but also a complex part for various intersection constructions of templates, reinforcing steel bars, concrete engineering and the like, and is also a key for really showing the construction quality level.
Disclosure of Invention
The invention aims to provide a construction method for a pivot node inclined column of a connecting cantilever structure system, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a construction method of an inclined column of a pivot joint of a connecting cantilever structure system comprises the following steps:
step A: measuring and paying off, and ensuring that the appearance size of the main body structure meets the design requirement on the premise of ensuring that the main body structure reaches the foundation of the fair-faced concrete;
and B: installing steel skeleton columns and H steel beams, welding the nodes of the stiff H-shaped steels of the frame columns and the oblique columns at a steel member manufacturer, adopting a computer simulation construction drawing to loft and manufacture a model in advance at the manufacturer, accurately welding three H-shaped steels in each angle direction on the stiff circular steel tubes of the frame columns with the axes popped out according to the angle size of the model, numbering one by one, and transporting the steel skeleton columns to a site to align the projected plane axes one by one for contraposition installation;
and C: the method comprises the following steps of (1) pouring a stand column, wherein firstly, the main reinforcements of the stand column are mechanically connected, firstly, column stirrups are bound, then, a column template is installed, then, concrete in a steel pipe is poured, and finally, concrete outside the steel pipe is poured;
step D: pouring a contact oblique column, namely firstly erecting an oblique beam (plate) bottom mould, then inserting and connecting main ribs of the oblique beam, then binding stirrups of the oblique beam, then erecting an oblique beam side mould and a plate bottom mould, then binding plate reinforcing steel bars, and finally pouring beam plate concrete;
step E: and (4) dismantling all the die plates, and cleaning the die plates, the beams and the cylindrical surfaces.
Preferably, in the measurement and paying-off process in the step A, in order to ensure the accuracy of the plane axis, the pile is controlled according to the axis control, the required axis is projected onto the construction layer to be used as the check of the angle and the distance, other corresponding design axes and detail lines can be released on the plane after the check is correct, and finally the elevation is measured by guiding.
Preferably, the column reinforcing steel bars and the joint inclined columns in the step C and the step D are bound by binding the stirrups of the columns in a segmented manner: firstly, binding a column hoop below a beam bottom; secondly, binding hoops in a joint area after the bottom ribs of the frame beam are penetrated; and finally, adding a node (positioning) stirrup on the beam surface after the frame beam reinforcing steel bars are bound, wherein the specific construction flow is as follows: the method comprises the steps of firstly, binding a column hoop below a frame beam, secondly, installing a column mould, thirdly, pouring column concrete (a top layer side column needs to be paid attention to the anchoring position of enough beam ribs), fourthly, dismantling the column mould, fifthly, installing a frame beam bottom mould, sixthly, installing frame beam bottom rib binding, seventhly, node stirrup binding, eighthly, adding a node (positioning) stirrup at the frame beam reinforcing steel beam surface, nineteenth, installing a node area template, and tenth and installing a frame beam side mould.
Preferably, in the trapping process of the column reinforcing steel bars and the connecting point inclined columns in the step C and the step D, the upper row of inserting bars of the inclined columns is welded and anchored with the stiff steel columns in the frame columns, the lower parts of the inclined columns have spaces meeting the requirement of anchoring length, the longitudinal bars are anchored into the frame columns by inserting bars, the reinforcing steel bars at the inserting bar angles are lofted by a computer due to different angles, directions and lengths, the stacking position and the inserting sequence of the reinforcing steel bars are considered during reinforcing steel bar processing, and the shape and the size of each reinforcing steel bar are determined on site according to the space occupying avoiding relationship of the reinforcing steel bars.
Preferably, the batter post reinforcing bar adopts straight thread mechanical connection, and the surplus portion of bundle silk of ligature reinforcing bar is to the inside bending of component.
Preferably, in the steps a to E, the binding method adopts a reverse binding method to bind the binding buckles on the inner side of the structure, the steel bars and the templates need to be inspected after rain in the construction process, rust on the steel bars and the templates is cleaned, and the protective layers of the steel bars are padded by using the cushion blocks.
Preferably, when the node templates in the steps A to E are installed, a forming inclined column wood model node process is adopted, the inclined column forming node wood template is a template reinforcing system at an inclined column joint position customized by a film-coated bamboo plywood, and the method is characterized in that: the lower opening of the inclined column template and the butt joint edge of the side surface of the vertical frame column are provided with angle iron frames which are matched with each other, the frames are connected with the frame column interface through a bolt system, the bottom die, the two side dies or the surface die at the other end are made to be different in length so as to facilitate the staggering of seams during on-site assembly, and the bolt system comprises upper angle steel, lower angle steel, nuts, screws and bolts; the angle steel is provided with a bolt hole, the bolt is big end down, and the upper angle steel and the lower angle steel are connected and reinforced through the bolt.
Preferably, in the steps A to E, in order to effectively prevent slurry leakage, a method of sticking sponge strips at the joints of different board surfaces of the template is adopted, and the sponge strips are level to the board surfaces after being squeezed tightly; the gap at the lower part of the vertical template is tightly sealed.
Preferably, after the step C and the step D are finished and the main reinforcements of the frame column and the stirrups of the node area are checked and accepted, when the pouring process of each step is carried out, a steel mould of the frame column is firstly installed, in order to prevent the root of the frame column from expanding, two counter bolts which are vertical to each other and have phi 12 lengths are additionally arranged at the root of the steel mould to reinforce, then the node template is installed on site according to the construction sequence and along with the construction progress, sponge strips are fully pasted at the edge to ensure that the interface does not leak slurry, the embedding needs to be flat and straight, and the sponge strips are tightly extruded and then are kept flat with the inner surface of the template to ensure that the lines of the node are clear and straight,
in the installation process, firstly, preliminarily fixing the corresponding oblique column node template and a frame column body, checking installation elevation and inclination angle, adjusting the installation fixture after accuracy, preliminarily inserting the bolt, rechecking the bolt without errors, forcibly inserting the bolt to complete installation, then lengthening and assembling the oblique column template on site, reinforcing the oblique column template by using a steel pipe fixture after assembling, ensuring that the spacing is not more than 400mm, and opening a hole of 200 x 200 per 2 meters on the oblique column template for facilitating concrete pouring.
Compared with the prior art, the invention has the beneficial effects that:
1. the construction method solves the problem of the relationship between the steel column stud and the steel rib outer steel bar, ensures that the binding of the frame column steel bar is not influenced by the stud, simplifies the binding mode and improves the construction efficiency of binding.
2. The construction method can treat the hooping of the frame column at the multidirectional intersection joint meeting the steel ribs, so that the hooping action at the beam column structure of the frame column is not weakened, and the strength of the structure is improved.
3. The construction method ensures that the main reinforcement of the frame beam smoothly passes through the steel rib column after meeting the steel rib column, so that the shearing of the frame beam at the column end is not influenced, and the construction difficulty is greatly reduced.
4. The concrete mixing proportion is optimized, so that the concrete pouring compactness of the dense part of the reinforcing steel bars of the multi-column intersection nodes is guaranteed.
5. The method simplifies the technical preparation workload of binding the steel bars at the intersection nodes of the columns by using a computer, improves the working efficiency and obtains the maximum harvest with the least investment.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 provides a technical scheme that: a construction method of an inclined column of a pivot joint of a connecting cantilever structure system comprises the following steps:
step A: measuring and paying off, and ensuring that the appearance size of the main body structure meets the design requirement on the premise of ensuring that the main body structure reaches the foundation of the fair-faced concrete;
and B: installing steel skeleton columns and H steel beams, welding the nodes of the stiff H-shaped steels of the frame columns and the oblique columns at a steel member manufacturer, adopting a computer simulation construction drawing to loft and manufacture a model in advance at the manufacturer, accurately welding three H-shaped steels in each angle direction on the stiff circular steel tubes of the frame columns with the axes popped out according to the angle size of the model, numbering one by one, and transporting the steel skeleton columns to a site to align the projected plane axes one by one for contraposition installation;
and C: the method comprises the following steps of (1) pouring a stand column, wherein firstly, the main reinforcements of the stand column are mechanically connected, firstly, column stirrups are bound, then, a column template is installed, then, concrete in a steel pipe is poured, and finally, concrete outside the steel pipe is poured;
step D: pouring a contact oblique column, namely firstly erecting an oblique beam (plate) bottom mould, then inserting and connecting main ribs of the oblique beam, then binding stirrups of the oblique beam, then erecting an oblique beam side mould and a plate bottom mould, then binding plate reinforcing steel bars, and finally pouring beam plate concrete;
step E: and (4) dismantling all the die plates, and cleaning the die plates, the beams and the cylindrical surfaces.
Specifically, in the measurement and paying-off process in the step A, the accuracy of the plane axis is ensured, the pile is controlled according to the axis control, the required axis is thrown onto a construction layer to be used as the check of the angle and the distance, other corresponding design axes and detail lines can be released on the plane after the check is correct, and finally the elevation is guided and measured;
when the elevation is measured by guiding, the precision requirement of vertical control is ensured, the joint measurement of a height control network point is firstly carried out, whether a horizontal point in a field is collided or not is checked, and the elevation is measured by guiding after the error is confirmed. The transmission of the elevation uses the top line of the first layer red delta as an elevation datum line, and the elevation datum line is guided upwards by a steel ruler qualified in verification, or is positioned in the middle layer, and is additionally provided with the elevation datum point so as to be transmitted upwards.
Specifically, the column reinforcements and the joint inclined columns in the step C and the step D are bound, and the way is to bind the stirrups of the columns in a segmented manner: firstly, binding a column hoop below a beam bottom; secondly, binding hoops in a joint area after the bottom ribs of the frame beam are penetrated; and finally, adding a node (positioning) stirrup on the beam surface after the frame beam reinforcing steel bars are bound, wherein the specific construction flow is as follows: the method comprises the steps of firstly, binding a column hoop below a frame beam, secondly, installing a column mould, thirdly, pouring column concrete (a top layer side column needs to be paid attention to the anchoring position of enough beam ribs), fourthly, dismantling the column mould, fifthly, installing a frame beam bottom mould, sixthly, installing frame beam bottom rib binding, seventhly, node stirrup binding, eighthly, adding a node (positioning) stirrup at the frame beam reinforcing steel beam surface, nineteenth, installing a node area template, and tenth and installing a frame beam side mould.
Specifically, in the trapping process of the column reinforcing steel bars and the connecting point inclined columns in the step C and the step D, the upper row of inserting bars of the inclined columns are welded and anchored with the stiff steel columns in the frame columns, the lower parts of the inclined columns have spaces which meet the requirement of anchoring length, longitudinal bars of the inclined columns are anchored into the frame columns by inserting bars, the reinforcing steel bars at the angle of the inserting bars are lofted by a computer due to different angles, directions and lengths, the stacking position and the inserting sequence of the reinforcing steel bars are considered during the processing of the reinforcing steel bars, and the shape and the size of each reinforcing steel bar are determined on site according to the space occupying and avoiding relationship of the reinforcing steel bars;
the vertical column stiff concrete column in the anchoring node area of the longitudinal ribs and the intersection oblique column are provided with a large number of longitudinal ribs, if the longitudinal ribs are all intensively anchored into the same frame column node by adopting the inserted ribs, the longitudinal ribs in all directions are in the anchoring length area and cannot be arranged even if being crossed and overlapped, the gap between the outer edge of the frame column concrete and the stiff round steel tube is only 15cm, and the space of the gap is extremely limited, so that the upper row of inserted ribs of the oblique column and the stiff steel column in the frame column are welded and anchored, the problem that the anchoring length cannot be met due to the space occupied by the stiff H-shaped steel in the oblique column is solved, and the flaw detection of a welding seam must be carried out to ensure the structural strength.
Specifically, the inclined column steel bars are mechanically connected by straight threads, excess binding wires for binding the steel bars are bent towards the inner side of the component, a multi-column node area is also a node core area and is an important component of a main body structure, the number of the steel bars is large, the structure is complex, the stirrup is often sleeved in a specific position for reinforcement according to the structural requirement, a hook at the end part of the stirrup is processed into a right angle to facilitate sleeving, the overlapping part of the hook at the end part of the stirrup is welded and sealed after binding is finished, and concrete pouring and steel saving are facilitated in order to ensure that the density of the steel bars in the overlapping range is not increased;
therefore, the inclined column reinforcing steel bars are mechanically connected by straight threads, and the excess binding wire part for binding the reinforcing steel bars is bent towards the inner side of the component, so that the influence on the appearance and quality of the fair-faced concrete caused by rusty spots formed by exposure is avoided.
Specifically, in the steps A-E, the binding method adopts a reverse picking and binding method to bind the binding buckles to the inner side of the structure, the steel bars and the templates need to be checked after rain in the construction process, rust on the steel bars and the templates is cleaned, protective layers of the steel bars are well padded by cushion blocks, and the reverse picking and binding method adopts reverse operation on the basis of all existing steel bar binding methods to bind the binding buckles to the inner side of the structure, so that the binding buckles can be effectively hidden in the steel bars of the pouring structure, and exposure is avoided;
the reason why the clear water concrete surface produced yellow rust usually is because the metal tie wire exposes, because the concrete is not in time poured in the rainy day after the reinforcement, rust leaves over on the template and does not clear up totally, or the individual region has the reinforcing bar protective layer to cause because of the aspect reasons such as thin slightly, also have the individual iron nail that causes because of leaving over in time to clear up, consequently, need again after the rain to inspect reinforcing bar and template, clean up the rust on reinforcing bar and the template, and fill up the protective layer of reinforcing bar with the cushion.
Specifically, when the node templates in the steps A to E are installed, a forming inclined column wood model node process is adopted, the inclined column forming node wood template is a template reinforcing system at an inclined column joint position customized by a film-coated bamboo plywood, and the method is characterized in that: the lower opening of the inclined column template and the butt joint edge of the side surface of the vertical frame column are provided with angle iron frames which are matched with each other, the frames are connected with the frame column interface through a bolt system, the bottom die, the two side dies or the surface die at the other end are made to be different in length so as to facilitate the staggering of seams during on-site assembly, and the bolt system comprises upper angle steel, lower angle steel, nuts, screws and bolts; a bolt hole is formed in the angle steel, the bolt is large in upper part and small in lower part, and the upper angle steel and the lower angle steel are connected and reinforced through the bolt;
if the template engineering is a key point in the construction of a main structure, the quality of the multi-column joint template engineering is the primary condition and the technical key for achieving the effect of the fair-faced concrete, and the template has the advantages of accurate size, enough rigidity, tight and flat abutted seams and smooth and clean plate surface. In construction practice, the most common method is that temporary bulk is adopted on site, the common problems of overlarge size deviation, loose abutted seams, poor surface flatness and verticality and the like easily occur, the dismounting and the remounting are very troublesome, an improved method of adopting a tool type shaping template for the batter post node template is tried, a scheme of shaping a batter post node steel mold is tried at first, but because the node is positioned outside a corner floor plane, no operation plane exists when the node template is installed, manual matching is needed when a tower crane is used for lifting, the steel template is heavy, the installation operation is inconvenient, repeated brewing and comparison are carried out, and the most preferred method is the batter post wood mold node process;
the re-inclined column wood model node process comprises the following steps:
1. the overhanging large span beam slab of the overhead support of the frame column and the batter post has an overhanging height far exceeding 8m, is a project with larger danger exceeding a certain scale, adopts a floor type full steel pipe scaffold support frame to support overhanging systems of the batter post and the like, so that the full scaffold support is firstly erected in place to fix the stiff H-shaped steel of the batter post and lead the elevation and the axis to be measured well.
2. The special-shaped frame column is made of a tool type shaping steel die, aligning axes are popped out from the lower portion of the steel die and the nodes of the three oblique columns in an oblique crossing mode in advance, notches are cut accurately according to the size and the shape of intersection, butt-joint frames are welded, and bolt holes are formed.
3. A tool type inclined column node template is manufactured by a skilled carpenter according to template manufacturing drawings of each node, a butt-joint frame and a bolt hole are welded at one end obliquely crossed with a frame column, and numbering and identification are performed according to a construction drawing pop-up axis.
4. After the step C and the step D are finished and the main reinforcements and the stirrups of the node area of the frame column are checked and accepted, when the pouring process of each step is carried out, firstly, a steel mould of the frame column is installed, in order to prevent the root part of the frame column from expanding, two counter bolts which are vertical to each other and have phi 12 lengths are added at the root part of the frame column for reinforcement, then, according to the construction sequence and along with the construction progress, a node template is installed on site, sponge strips are fully attached at the edges to ensure that the interface does not leak slurry, the attaching needs to be flat and straight, and the sponge strips are flush with the inner surface of the template after being extruded tightly to ensure that the lines of the node are clear and straight,
in the installation process, firstly, preliminarily fixing the corresponding oblique column node template and a frame column body, checking installation elevation and inclination angle, adjusting the installation fixture after accuracy, preliminarily inserting the bolt, rechecking the bolt without errors, forcibly inserting the bolt to complete installation, then lengthening and assembling the oblique column template on site, reinforcing the oblique column template by using a steel pipe fixture after assembling, ensuring that the spacing is not more than 400mm, and opening a hole of 200 x 200 per 2 meters on the oblique column template for facilitating concrete pouring.
Specifically, in the steps A to E, in order to effectively prevent slurry leakage, a method of sticking sponge strips at the joints of different board surfaces of the template is adopted, and the sponge strips are level to the board surfaces after being tightly squeezed; the gap at the lower part of the vertical template is tightly sealed.
Particularly, in the step E, commercial concrete is selected as the concrete, the mixing proportion is designed according to the actual engineering situation, the concrete slump required to be transported to the site is 180-200 mm, and the construction quality of the concrete is guaranteed for convenience of construction. The mixing plant is used for properly adjusting the concrete slump according to the pouring time;
the concrete pouring in the node area is an important link for ensuring the appearance. The frame column is poured first to prevent the batter post from shifting. Before pouring, bottom crossing is done, and the responsibility of operators is implemented. The concrete of the entering commercial product is checked for slump and cannot be used when the slump does not meet the regulations. The slump of the concrete with the inclined column can be enlarged to 22cm, and the concrete is beaten by internal vibration and external vibration, and the concrete is stopped when the concrete surface is horizontal and uniform cement paste appears, and obvious sinking and a large amount of bubbles rise no longer. A reserved hole at the upper opening of the oblique column mold is tightly supplemented by the same template square before the concrete is poured at the reserved hole;
and curing is carried out in time after the form is removed, so that the phenomena of chromatic aberration, shrinkage cracks and the like on the surface of the concrete are reduced. The maintenance adopts a method of covering a plastic film and adding a cotton blanket, and a maintenance scheme combining watering and maintenance, wherein water is sprayed to keep the plastic film wet before the form is removed and in the maintenance process, and the maintenance time is not less than 14 days.
The process principle is as follows:
1. and (4) paying off by adopting a total station and a theodolite, and determining the position of the axis of the column to form an internal control plane control network.
2. The frame column and the node of the stiff H-shaped steel of the batter post are welded at a steel member manufacturer, a computer simulation construction drawing is adopted in advance at the manufacturer to loft and manufacture a model, and then the model is manufactured and installed according to the angle size of the model.
3. The inclined column steel bars are installed and lofted through a computer, the stacking position and the inserting sequence of the steel bars are considered during steel bar processing, and the shape and the size of each steel bar are determined on site according to the space occupying and avoiding relation of the steel bars.
4. At the joint of the beam-column joint, a part of the beam steel bar passes through the wing plate of the steel column and is connected with the other span beam, and a part of the steel bar is welded on the reinforcing plate of the wing plate.
5. The erection of the inclined column template is different from the erection of a common reinforced concrete column template, and one of the split bolts which penetrate through the section of the framework is not easy to penetrate through, so that the split bolts of the template are fixed by welding reinforcing steel bars on the studs.
6. Pouring concrete, reasonably selecting raw materials, determining the mixing proportion of the concrete, and adjusting the water cement ratio to achieve the purposes of ensuring the strength, saving resources and coordinating with environmental protection
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A construction method for an inclined column of a pivot joint of a connecting cantilever structure system is characterized by comprising the following steps:
step A: measuring and paying off, and ensuring that the appearance size of the main body structure meets the design requirement on the premise of ensuring that the main body structure reaches the foundation of the fair-faced concrete;
and B: installing steel skeleton columns and H steel beams, welding the nodes of the stiff H-shaped steels of the frame columns and the oblique columns at a steel member manufacturer, adopting a computer simulation construction drawing to loft and manufacture a model in advance at the manufacturer, accurately welding three H-shaped steels in each angle direction on the stiff circular steel tubes of the frame columns with the axes popped out according to the angle size of the model, numbering one by one, and transporting the steel skeleton columns to a site to align the projected plane axes one by one for contraposition installation;
and C: the method comprises the following steps of (1) pouring a stand column, wherein firstly, the main reinforcements of the stand column are mechanically connected, firstly, column stirrups are bound, then, a column template is installed, then, concrete in a steel pipe is poured, and finally, concrete outside the steel pipe is poured;
step D: pouring a contact oblique column, namely firstly erecting an oblique beam (plate) bottom mould, then inserting and connecting main ribs of the oblique beam, then binding stirrups of the oblique beam, then erecting an oblique beam side mould and a plate bottom mould, then binding plate reinforcing steel bars, and finally pouring beam plate concrete;
step E: and (4) dismantling all the die plates, and cleaning the die plates, the beams and the cylindrical surfaces.
2. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: and B, in the measurement and paying-off process in the step A, in order to ensure the accuracy of the plane axis, controlling the pile according to the axis control, throwing the required axis onto the construction layer to be used as the check of the angle and the distance, and after the check is correct, releasing other corresponding design axes and detail lines on the plane, and finally guiding and measuring the elevation.
3. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: c, binding the column steel bars and the joint inclined columns in the step D, and binding the stirrups of the columns in a segmented manner: firstly, binding a column hoop below a beam bottom; secondly, binding hoops in a joint area after the bottom ribs of the frame beam are penetrated; and finally, adding a node (positioning) stirrup on the beam surface after the frame beam reinforcing steel bars are bound, wherein the specific construction flow is as follows: the method comprises the steps of firstly, binding a column hoop below a frame beam, secondly, installing a column mould, thirdly, pouring column concrete (a top layer side column needs to be paid attention to the anchoring position of enough beam ribs), fourthly, dismantling the column mould, fifthly, installing a frame beam bottom mould, sixthly, installing frame beam bottom rib binding, seventhly, node stirrup binding, eighthly, adding a node (positioning) stirrup at the frame beam reinforcing steel beam surface, nineteenth, installing a node area template, and tenth and installing a frame beam side mould.
4. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: in the trapping process of the column reinforcing steel bars and the contact inclined columns in the step C and the step D, the upper row of inserting bars of the inclined columns are welded and anchored with the stiff steel columns in the frame columns, the lower parts of the inclined columns have spaces to meet the requirement of anchoring length, the longitudinal bars of the inclined columns are anchored into the frame columns by inserting bars, the reinforcing steel bars at the inserting bar angles are lofted by a computer due to different angles, directions and lengths, the stacking positions and the inserting sequence of the reinforcing steel bars are considered during reinforcing steel bar processing, and the shape and the size of each reinforcing steel bar are determined on site according to the space occupying avoiding relation of the reinforcing steel bars.
5. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: the inclined column reinforcing steel bars are mechanically connected by straight threads, and excess binding wire parts for binding the reinforcing steel bars are bent towards the inner side of the component.
6. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: in the steps A to E, the binding method adopts a reverse drawing and binding method to bind the binding buckles on the inner side of the structure, the steel bars and the templates need to be checked after rain in the construction process, rust on the steel bars and the templates is cleaned, and the protective layers of the steel bars are well cushioned by the cushion blocks.
7. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 1, which is characterized in that: when the node templates in the steps A to E are installed, a forming inclined column wood model node process is adopted, the inclined column forming node wood template is a template reinforcing system at the inclined column joint position customized by a film-coated bamboo plywood, and is characterized in that: the lower opening of the inclined column template and the butt joint edge of the side surface of the vertical frame column are provided with angle iron frames which are matched with each other, the frames are connected with the frame column interface through a bolt system, the bottom die, the two side dies or the surface die at the other end are made to be different in length so as to facilitate the staggering of seams during on-site assembly, and the bolt system comprises upper angle steel, lower angle steel, nuts, screws and bolts; the angle steel is provided with a bolt hole, the bolt is big end down, and the upper angle steel and the lower angle steel are connected and reinforced through the bolt.
8. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 7, wherein: in the steps A-E, in order to effectively prevent slurry leakage, a method of sticking sponge strips at the joints of different board surfaces of the template is adopted, and the sponge strips are level to the board surface after being tightly squeezed; the gap at the lower part of the vertical template is tightly sealed.
9. The construction method of the inclined column of the pivot node of the connecting cantilever structure system according to claim 7, wherein: after the step C and the step D are finished and the main reinforcements and the stirrups of the node area of the frame column are checked and accepted, when the pouring process of each step is carried out, firstly, a steel mould of the frame column is installed, in order to prevent the root part of the frame column from expanding, two counter bolts which are vertical to each other and have phi 12 lengths are added at the root part of the frame column for reinforcement, then, according to the construction sequence and along with the construction progress, a node template is installed on site, sponge strips are fully attached at the edges to ensure that the interface does not leak slurry, the attaching needs to be flat and straight, and the sponge strips are flush with the inner surface of the template after being extruded tightly to ensure that the lines of the node are clear and straight,
in the installation process, firstly, the corresponding inclined column node template and a frame column body are preliminarily fixed, the installation elevation and the inclination angle are checked, the installation fixture is installed after the adjustment is accurate, the bolt is preliminarily inserted, the installation is completed after the rechecking is carried out, then the inclined column template is lengthened on site, the steel pipe fixture is adopted to reinforce the assembled inclined column template, the distance is not more than 400mm, and the hole of 200X 200 is formed in each 2 m of the upper opening of the inclined column template for concrete pouring.
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| CN103526930A (en) * | 2013-10-14 | 2014-01-22 | 成军 | Multi-directional intersection reinforced bare concrete inclined column construction method |
| CN108412125A (en) * | 2018-02-28 | 2018-08-17 | 浙江勤业建工集团有限公司 | A kind of strengthening concrete composite structure frame beam column construction |
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| CN103526930A (en) * | 2013-10-14 | 2014-01-22 | 成军 | Multi-directional intersection reinforced bare concrete inclined column construction method |
| CN108412125A (en) * | 2018-02-28 | 2018-08-17 | 浙江勤业建工集团有限公司 | A kind of strengthening concrete composite structure frame beam column construction |
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