CN109989525B - Y-shaped composite supporting structure and construction method thereof - Google Patents
Y-shaped composite supporting structure and construction method thereof Download PDFInfo
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- CN109989525B CN109989525B CN201910297885.9A CN201910297885A CN109989525B CN 109989525 B CN109989525 B CN 109989525B CN 201910297885 A CN201910297885 A CN 201910297885A CN 109989525 B CN109989525 B CN 109989525B
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- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 97
- 238000009434 installation Methods 0.000 claims abstract description 21
- 238000009415 formwork Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 description 24
- 239000010959 steel Substances 0.000 description 24
- 238000000034 method Methods 0.000 description 12
- 238000003466 welding Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 7
- 239000004568 cement Substances 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
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- 239000000835 fiber Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 239000011211 glass fiber reinforced concrete Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
- E04G13/021—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 for circular columns
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention provides a Y-shaped composite supporting structure and a construction method thereof, wherein the supporting structure comprises the following components: a concrete support column; a column core comprising a Y-shaped mould cylinder installed on the concrete supporting column and concrete poured into the Y-shaped mould cylinder; the prefabricated curved surface decorative layer is coated on the outer side of the Y-shaped mold cylinder and comprises a prefabricated panel and a plurality of supporting frames installed on the outer side wall of the Y-shaped mold cylinder, one side, far away from the Y-shaped mold cylinder, of each supporting frame forms a smooth installation surface, and the prefabricated panel is installed on the installation surface. The invention solves the problem that the positioning and deviation correction of the column top of the Y-shaped concrete column are difficult due to the fact that the traditional reinforced concrete pouring is adopted by the Y-shaped concrete column.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a Y-shaped composite supporting structure and a construction method thereof.
Background
In a large building structure, the split part of a Y-shaped concrete column designed for supporting a roof is complex in shape, a single octagonal column at the lower part of the Y-shaped concrete column is split upwards and gradually changed into two cones with circular cross sections, and embedded parts of the two cones of the Y-shaped concrete column are connected with the roof and transmit force. According to the traditional concrete pouring construction mode, the field construction difficulty of the split area at the upper part of the Y-shaped concrete column is very high, and the following problems mainly exist:
1. the modeling is complex, the template supporting system is complex, and only a large-sized shaping steel die can be selected.
2. The steel bars are large in size and very dense, and the steel bar binding difficulty is high. The formed steel bar framework cannot be subjected to overall dimension and space positioning deviation correction due to the overall rigidity and certain ductility.
3. The embedded part positioning at the top of the two cones of the Y-shaped concrete column cannot be corrected, so that embedded part is embedded and misplaced, and the roof cannot be installed.
4. The steel bars have large and very dense specifications and complex shapes. Concrete pouring is extremely difficult, vibration compaction is impossible, and a large number of quality defects such as honeycomb pitting surfaces and the like exist after the die is removed.
5. The connection position of the roof (steel structure) and the Y-shaped concrete column is arranged at the top of the Y-shaped column, and the connection position is improperly arranged, so that the natural defect exists in the aspect of structural stress.
Disclosure of Invention
In order to overcome the defects existing in the prior art, a Y-shaped composite supporting structure is provided at present, so that the problem that the positioning and deviation correction of the column top of a Y-shaped concrete column are difficult due to the fact that the traditional reinforced concrete pouring is adopted by the Y-shaped concrete column is solved.
To achieve the above object, there is provided a Y-shaped composite support structure comprising: a concrete support column;
a column core comprising a Y-shaped mould cylinder installed on the concrete supporting column and concrete poured into the Y-shaped mould cylinder; and
the prefabricated curved surface decorative layer is coated on the outer side of the Y-shaped mold cylinder and comprises a prefabricated panel and a plurality of supporting frames installed on the outer side wall of the Y-shaped mold cylinder, one side, far away from the Y-shaped mold cylinder, of each supporting frame forms a smooth installation surface, and the prefabricated panel is installed on the installation surface.
Further, a stiffening plate is connected between the Y-shaped mold cylinder and the concrete supporting column.
Further, the Y-shaped mold cylinder comprises a first mold cylinder installed on the concrete supporting column, two sides of the first mold cylinder are respectively connected with a second mold cylinder which is obliquely upwards arranged, and concrete is poured into the first mold cylinder and the second mold cylinder.
Further, a through hole is formed in the side wall of the first die cylinder, and the through hole is communicated with the second die cylinder.
Further, the prefabricated panel is a prefabricated GRC panel, an embedded part is buried in the inner surface of the prefabricated GRC panel, and the embedded part is connected to the support frame.
Further, the lengths of the plurality of supporting frames gradually become shorter from the lower end of the Y-shaped mold cylinder to the upper end of the Y-shaped mold cylinder.
Further, one end of the supporting frame is fixed on the surface of the Y-shaped mold cylinder, a connecting beam is connected to the other end of the supporting frame, the surface shape of the connecting beam is matched with the design surface shape of the formed Y-shaped composite supporting structure, and the prefabricated panel is installed on the surface of the connecting beam.
The invention provides a construction method of a Y-shaped composite support structure, which comprises the following steps:
constructing a concrete supporting column;
mounting a Y-shaped mold to the concrete support post;
pouring concrete into the Y-shaped mold cylinder to form a column core;
installing a plurality of supporting frames on the outer side wall of the Y-shaped mold cylinder, so that a smooth installation surface is formed on one side, far away from the Y-shaped mold cylinder, of the supporting frames;
and installing the prefabricated panel on the installation surface to form a prefabricated curved surface decorative layer coated on the outer side of the Y-shaped mold cylinder.
Further, before the step of pouring concrete into the Y-shaped mold to form a column core, the method further comprises the steps of: a stiffening plate is provided and is connected between the Y-shaped formwork and the concrete support column.
Further, the Y-shaped mold cylinder comprises a first mold cylinder and a second mold cylinder, grouting holes are respectively formed in the first mold cylinder and the second mold cylinder, through holes are formed in the side wall of the first mold cylinder, the through holes are communicated with the second mold cylinder, and the step of pouring concrete into the Y-shaped mold cylinder to form a column core comprises the following steps:
pouring the concrete into the first mould cylinder through a grouting hole at the top of the first mould cylinder, wherein the liquid level of the concrete poured into the first mould cylinder is positioned below the through hole;
and pouring the concrete into the second mould cylinder through the grouting holes of the second mould cylinder, so that the first mould cylinder is filled with the concrete in the second mould cylinder through the through holes.
The Y-shaped composite supporting structure has the advantages that the supporting structure is divided into the composite structure consisting of the concrete supporting column with the full concrete structure, the Y-shaped mold cylinder, the concrete and the prefabricated curved surface decorative layer, and the composite structure is formed by organically mixing the concrete and the prefabricated curved surface decorative layer.
Drawings
Fig. 1 is a cross-sectional view of a Y-shaped composite support structure in accordance with an embodiment of the present invention.
Fig. 2 is a schematic diagram of a state of the Y-shaped composite support structure after concrete pouring according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a prefabricated curved decorative layer of a Y-shaped composite support structure according to an embodiment of the present invention.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Fig. 1 is a cross-sectional view of a Y-shaped composite support structure according to an embodiment of the present invention, fig. 2 is a schematic view of a state of the Y-shaped composite support structure after concrete is poured, and fig. 3 is a schematic view of a prefabricated curved decorative layer of the Y-shaped composite support structure according to an embodiment of the present invention.
Referring to fig. 1 to 3, the present invention provides a Y-shaped composite support structure comprising: a concrete supporting column 1, a column core 2 and a prefabricated curved surface decorative layer 3.
Specifically, the column core 2 includes a Y-shaped mold and concrete 23. The Y-shaped mold is filled with concrete 23 to form the column core 2. The prefabricated curved surface decorative layer 3 is coated on the outer side of the Y-shaped mold cylinder. The prefabricated curved decorative layer 3 comprises a prefabricated panel 31 and a plurality of supporting frames 32. A plurality of support brackets 32 are mounted on the outer side wall of the Y-shaped mold cylinder. The side of the plurality of support brackets 32 remote from the Y-shaped mold cylinder forms a smooth mounting surface. A prefabricated panel 31 is mounted on the mounting surface.
The Y-shaped composite supporting structure divides the supporting structure into the composite structure composed of the concrete supporting column of the full concrete structure, the Y-shaped mold cylinder, the concrete and the prefabricated curved surface decorative layer, and the composite structure is formed by organically mixing the concrete and the prefabricated curved surface decorative layer.
In the present embodiment, the Y-shaped mold includes a first mold 21 and a second mold 22. The first mould cylinder 21 has a closed end and an open end mounted to the concrete support column 1. The first die cylinder 21 is vertically disposed. The open end of the first die cylinder 21 is mounted on the upper end face of the concrete support column. The closed end (top) of the first mold cylinder 21 is provided with a grouting hole. The outer side wall of the first die cylinder 21 is connected with a second die cylinder 22 which is arranged obliquely upwards. The first and second mold cylinders 21 and 22 are filled with concrete 23 to form a column core.
In this embodiment, a stiffening plate 4 is connected between the second mould cylinder 22 and the concrete support column 1. Specifically, the upper end of the concrete support column 1 is embedded with connecting ribs and cross shear keys. The connecting ribs and the cross shear keys extend into the open ends of the first mold cylinder 21 respectively and are buried in the concrete 23 in the first mold cylinder 21. The upper end of the stiffening plate 4 is connected to the outer side of the second mould cylinder 22, and the lower end of the stiffening plate 4 is supported and connected to the top of the concrete support column 1. Further, one side of the stiffening plate 4 is connected to the outer side wall of the first mold cylinder, and the stiffening plate is effectively supported between the first mold cylinder, the second mold cylinder and the concrete support column.
In the present embodiment, the inside of the first die cylinder 21 is provided with a reinforcing plate. The reinforcing plate is arranged along the radial direction of the first die cylinder, and specifically, the reinforcing plate is positioned below the joint of the second die cylinder and the first die cylinder and is positioned at a position where stress is concentrated. The reinforcing plate supports the first die cylinder at the joint of the second die cylinder and the first die cylinder. The reinforcing plate is provided with a diversion hole so that concrete can enter the lower part of the first mould cylinder through the diversion hole when the concrete is poured.
The side wall of the first die cylinder 21 is provided with a through hole 212. The through hole 212 communicates with the second die cylinder 22. Further, the through hole 212 is located at the axial position of the second die cylinder 22. When the concrete is poured, the concrete may pass through the second die cylinder 22 and enter the first die cylinder 21 via the through holes 212.
In this embodiment, the prefabricated panel 31 is a prefabricated GRC panel. Glass fiber reinforced concrete (Glass fiber Reinforced Concrete, abbreviated GRC). GRC is a fiber concrete composite material with alkali-resistant glass fiber as a reinforcing material and cement mortar as a matrix material, and GRC is a material which expresses imagination of a designer through mold modeling, textures and colors.
Specifically, the lengths of the support frames gradually shorten from the lower end of the Y-shaped mold cylinder to the upper end of the Y-shaped mold cylinder, so that the whole Y-shaped composite support structure has a trend of thick bottom and thin top, and the upper part of the Y-shaped composite support structure is bifurcated to form a special-shaped structure with thick bottom and thin top.
One end of the support 32 is secured to the Y-shaped cylinder surface. The other end of the support frame 32 is connected with a connecting beam 33. The surface shape of the connecting beam is matched with the design surface shape of the formed Y-shaped composite supporting structure. The prefabricated panel 31 is mounted to the surface of the connection beam.
In the present embodiment, the number of the connection beams 33 is plural, and the plural connection beams are provided in succession. Specifically, the inner side surface of the prefabricated panel 31 is embedded with embedded connection ribs, and the embedded connection ribs are connected to the connection beam.
The invention provides a construction method of a Y-shaped composite support structure, which comprises the following steps:
s1: the concrete support column 1 is constructed.
And constructing a concrete supporting column 1, wherein the concrete supporting column 1 is a reinforced concrete structure. The top of the concrete supporting column is pre-embedded with connecting ribs and cross shear keys. The upper ends of the connecting ribs and the cross shear keys respectively extend to the upper parts of the tops of the concrete supporting columns.
S2: providing a Y-shaped mold cylinder and mounting the Y-shaped mold cylinder on the concrete support column.
The Y-shaped mold includes a first mold 21 and a second mold 22. The first mold cylinder has an open end and a closed end. The second die cylinder 22 is connected to the outer side wall of the end of the first die cylinder 21 near the closed end in an inclined manner. The number of the second die cylinders 22 is two, and the second die cylinders are Y-shaped with the first die cylinders 21.
In the present embodiment, the first die cylinder 21 and the second die cylinder 22 are both round steel cylinders. The first mold cylinder and the second mold cylinder are respectively provided with grouting holes. The grouting holes 211 of the first mold cylinder are located on the end face of the closed end of the first mold cylinder. The sidewall of the first mold cylinder is provided with a through hole 212. The through hole 212 communicates with the second die cylinder.
In this embodiment, the method further includes the steps of: and providing a supporting frame, wherein the supporting frame is arranged below the second mould cylinder and is supported by the second mould cylinder.
S3, providing a stiffening plate 4, and connecting the stiffening plate 4 between the second mould cylinder 22 and the concrete support column 1. Preferably, one side of the stiffening plate is connected to the outer side wall of the first mold cylinder 21.
S4, providing concrete 23, and pouring the concrete 23 into the first mold cylinder 21 and the second mold cylinder 22 to form a column core.
The pouring of the concrete is performed in two times.
Specific:
s41, first filling. The concrete 23 is poured into the first mold 21 through the grouting holes 211, and the liquid surface a of the concrete 23 poured into the first mold 21 is positioned below the through holes 212 formed in the side wall of the first mold 21. The internal vibrator (vibrator or pot bottom vibrator, etc.) is adopted for vibrating, the time of each vibrating is not less than 30s, and the one-time irrigation height is not more than 2m. And during pouring, a hammer is adopted to knock to check whether the concrete is in a place with non-compact filling. If there is a non-compact place, an external vibrator attached to the steel pipe can be used for vibrating. The working range of the external vibrator is effective when the transverse amplitude of the steel pipe is not less than 0.3 mm.
S42, second pouring. The concrete 23 is poured into the second mold cylinder 22 through the grouting holes 221 of the second mold cylinder 22, and the concrete 23 in the second mold cylinder 22 is poured into the first mold cylinder 21 through the through holes 212 until the concrete overflows from the grouting holes 211.
S5: a prefabricated panel 31 and a plurality of support frames 32 are provided. A plurality of support frames 32 are mounted on the outer side wall of the Y-shaped mold cylinder, so that a smooth mounting surface is formed on one side of the plurality of support frames, which is far away from the Y-shaped mold cylinder. And mounting the prefabricated panel on the mounting surface.
Welding of the support frame 32 is performed prior to unloading of the support frame to avoid stress damage to the first and second mold cylinders caused by the burn-in. In view of the obvious three-dimensional effect of the Y-shaped composite support structure of the present invention, and the slight deviation in the angle between the first mold cylinder and the second mold cylinder, the support 32 should use BIM technology to loft the spatial three-dimensional model. In order to ensure the integral stability of the prefabricated GRC panel after installation, the support frame is longitudinally and horizontally connected into a ring shape through the connecting beam to form an integral framework, and all welded junctions are fixed by adopting a full-welding method. After the welding is finished, all welding seams are painted twice by adopting cold galvanizing paint.
The prefabricated GRC panel is installed and positioned, deviation is controlled and the installation method is as follows.
(1) And verifying the site size, sorting the deviation between the site size and the design size by adopting BIM technology, analyzing, and determining and adjusting the modified design size.
(2) According to the drawing size, the following steps are 1:1, engraving the female die in proportion, checking the size by a quality inspector after engraving the female die, and starting the subsequent molding process after ensuring that the size is free of errors.
(3) Confirming the partitioning (the Y-shaped column is divided into 46 blocks), and numbering each prefabricated GRC panel so as to achieve orderly production, transportation and installation; the partitioning is considered to facilitate later installation time adjustment (the installation method is described in the following points). Each segmented mold is fabricated.
(4) And (5) producing and curing the material.
(5) The material is transported to the site, the support frame adopts a galvanized square tube with the length of 50mm multiplied by 4mm, the support frame is welded and fixed in sequence along the parting position of the prefabricated GRC panel according to the drawing requirement, the size of the support frame is controlled to be within 100mm from the size of the mounting surface, and the in-out position and the left-right size are convenient to adjust during the mounting so as to meet the requirement of combining the design appearance size and the site size deviation of the drawing prefabricated GRC panel. Pre-burying a galvanized steel bar (connecting bar) with the diameter of 10mm during production of the inner surface of the prefabricated GRC panel, welding and connecting the galvanized steel bar with the supporting frame and the connecting beam during installation, and knocking out welding slag after welding the supporting frame to perform rust prevention treatment.
(6) And positioning and fixing the first circle of prefabricated GRC panels at the bottom by using a central vertical steel structure. Positioning the distance between the GRC finishing surface and the Y-shaped mold cylinder by taking the vertical steel column as the center according to the drawing size requirement; and (3) welding and installing according to the sequence of numbers, reserving 10mm gaps for modulation, later performing joint filling repair, removing welding slag of a welding point and performing rust prevention treatment. The ring of prefabricated GRC panels is particularly critical, and professional technicians are arranged to monitor and verify the installation size on site, so that subsequent installation is carried out after the installation size is consistent with the drawing size.
(7) And installing a second circle of prefabricated GRC panel according to the sequence of numbers, combining different angle sizes of a drawing and a field steel structure, adjusting a splicing gap of a middle concave part and a gap between a plate and the plate, controlling the smooth appearance of the finished surface of the prefabricated GRC panel (controlled within a range of 5 mm) and the distance from the periphery of the upper opening of the prefabricated GRC panel to a middle steel column to be consistent, and polishing the surface with a hand mill or repairing the surface with special cement in later stage with small local irregularity and smooth gap to achieve integral smooth appearance and bilateral symmetry. Professional technicians are arranged to monitor and verify the dimensions on site during installation, so that the dimensions are ensured to be consistent with those of drawings, and errors are avoided.
(8) And when the third and fourth rings of prefabricated GRC panels are installed, the method is the same as the method in the (7), different conditions of each steel column are combined on site according to the drawing size, the seam gap of the prefabricated GRC panels is utilized to adjust the appearance smoothly, the prefabricated GRC panels are installed in order, the distance from the joint between the rings to the middle steel structure is ensured to be consistent, and the drawing size requirement is met. Professional technicians are arranged to monitor and verify the size on site during installation, so that construction errors are avoided. And the deviation condition of the on-site bifurcation post is combined, and the bifurcation post is controlled to be installed with the prefabricated GRC panel, so that the integral requirement and the uniform appearance of the drawing are achieved.
(9) When the closing-in positions at the two ends of the top are installed, the plates are adjusted, the prefabricated GRC panels are cut and repaired within the allowable range, the sizes from four peripheral openings to the middle steel column (250 mm in drawing) are controlled, the finished faces of the prefabricated GRC panels of all columns are ensured to deviate from the outside of the venue to the inside of the venue, and the drawing requirements and smooth, smooth and attractive appearance are achieved; and (3) carrying out blind joint treatment on the joint of the top GRC closing-in and the steel structure, wherein the method is the same as the 1 st point.
The blind seam making method of the prefabricated GRC panel seam ensures that the overall effect is seamless. For the blind joint treatment, special joint sealing cement (material: 425# ordinary silica cement, external wall anti-cracking putty powder, fine sand, glass short fiber, building glue and water) or building structural glue is adopted, and the materials are uniformly stirred according to a certain proportion and placed for standby, and the use time of the materials is not more than 2 hours each time for filling.
The operation method comprises the following steps: firstly, cleaning each seam to be repaired, repairing with stirred joint filling cement or structural adhesive after no greasy dirt or dust is generated, firstly attaching fiber net sand to the oversized seam to prevent the joint from cracking, then filling with the joint filling cement or structural adhesive for the first time, repairing for the second time after the surface reaches a dry state, and compacting, and ensuring that the surface is flat and smooth. The paint construction can be compatible only if the putty base material can be made after the repaired seam is solidified for 48 hours.
Closing up the upper ports of the prefabricated GRC panel and the second die cylinder: the support frame is welded with the upper port of the second mold cylinder, the prefabricated GRC panel and the upper port of the second mold cylinder are filled with special repairing cement for two times, and the surface is polished and leveled.
The method for closing up the precast GRC panel and the concrete supporting column at the opening end of the first mold cylinder comprises the following steps: the joint of the lower part of the prefabricated GRC panel and the concrete support column is connected by filling weather-proof sealant, so that cracks caused by inconsistent cold and heat shrinkage of the prefabricated GRC panel and the concrete support column can be avoided.
The prefabricated GRC panel is connected with the concrete supporting column. Before the prefabricated GRC panel is installed, the steel ring plate of the concrete supporting column, the anchor bolts and the steel structure in the coverage area of the GRC bag are subjected to water accumulation removal, step garbage above the cleaning column head, rust removal of the steel structure, degreasing of the steel structure, rust prevention treatment of the steel structure, the prefabricated GRC panel is installed after the rust prevention treatment is finished, and the anchor bolts are wrapped inside the prefabricated GRC panel.
The Y-shaped column split part structure of the Y-shaped composite supporting structure is changed from concrete to Y-shaped mold cylinders (a first mold cylinder and a second mold cylinder), the construction speed is high, the construction of a steel structure of a roof part is not influenced, and the construction period is shortened. The complex gradual change curved surface of the Y-shaped column in the split area is changed from cast-in-place concrete to a GRC component prefabricated in a factory, so that the technical problem caused by a reinforced concrete structure and the quality hidden trouble caused by the reinforced concrete structure are avoided. The improved connection position of the steel structure and the concrete column is positioned at the top of the supporting column, the vertical compression is changed from compression and bending to simple vertical compression, and the space structure stress is more stable.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present invention, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present invention, and should still fall within the scope of the disclosure of the present invention without affecting the efficacy and achievement of the present invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the embodiments are not to be interpreted as limiting the invention, which is defined by the appended claims.
Claims (7)
1. A Y-shaped composite support structure comprising:
a concrete support column;
a column core comprising a Y-shaped mould cylinder installed on the concrete supporting column and concrete poured into the Y-shaped mould cylinder; and
the prefabricated curved surface decorative layer is coated on the outer side of the Y-shaped mold cylinder and comprises a prefabricated panel and a plurality of supporting frames installed on the outer side wall of the Y-shaped mold cylinder, one sides, far away from the Y-shaped mold cylinder, of the supporting frames form smooth installation surfaces, and the prefabricated panel is installed on the installation surfaces;
the prefabricated panel is a prefabricated GRC panel, an embedded part is embedded in the inner surface of the prefabricated GRC panel, and the embedded part is connected to the support frame;
the lengths of the supporting frames gradually shorten from the lower end of the Y-shaped mold cylinder to the upper end of the Y-shaped mold cylinder;
one end of the support frame is fixed on the surface of the Y-shaped mold cylinder, a connecting beam is connected to the other end of the support frame, the surface shape of the connecting beam is matched with the design surface shape of the formed Y-shaped composite support structure, and the prefabricated panel is installed on the surface of the connecting beam.
2. The Y-shaped composite support structure of claim 1 wherein stiffening plates are connected between the Y-shaped formwork and the concrete support columns.
3. The Y-shaped composite support structure according to claim 1, wherein the Y-shaped mold cylinder comprises a first mold cylinder installed on the concrete supporting column, two sides of the first mold cylinder are respectively connected with a second mold cylinder which is obliquely upwards arranged, and the first mold cylinder and the second mold cylinder are internally filled with the concrete.
4. A Y-shaped composite support structure according to claim 3, wherein the side wall of the first mould cylinder is provided with a through hole, and the through hole is communicated with the second mould cylinder.
5. A construction method of the Y-shaped composite support structure according to any one of claims 1 to 4, comprising the steps of:
constructing a concrete supporting column;
mounting a Y-shaped mold to the concrete support post;
pouring concrete into the Y-shaped mold cylinder to form a column core;
installing a plurality of supporting frames on the outer side wall of the Y-shaped mold cylinder, so that a smooth installation surface is formed on one side, far away from the Y-shaped mold cylinder, of the supporting frames;
and installing the prefabricated panel on the installation surface to form a prefabricated curved surface decorative layer coated on the outer side of the Y-shaped mold cylinder.
6. The construction method according to claim 5, further comprising, before the step of pouring concrete into the Y-shaped mold cylinder to form a column core, the step of: a stiffening plate is provided and is connected between the Y-shaped formwork and the concrete support column.
7. The construction method according to claim 5, wherein the Y-shaped mold cylinder includes a first mold cylinder and a second mold cylinder, grouting holes are respectively formed in the first mold cylinder and the second mold cylinder, through holes are formed in a side wall of the first mold cylinder, the through holes are communicated with the second mold cylinder, and the step of pouring concrete into the Y-shaped mold cylinder to form a column core includes:
pouring the concrete into the first mould cylinder through a grouting hole at the top of the first mould cylinder, wherein the liquid level of the concrete poured into the first mould cylinder is positioned below the through hole;
and pouring the concrete into the second mould cylinder through the grouting holes of the second mould cylinder, so that the first mould cylinder is filled with the concrete in the second mould cylinder through the through holes.
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| CN110685306B (en) * | 2019-10-31 | 2021-07-30 | 中铁建大桥工程局集团第五工程有限公司 | Positioning and measuring method for Y-shaped steel structural column of subway open-cut station |
| CN110805274A (en) * | 2019-11-19 | 2020-02-18 | 中铁二局集团有限公司 | Steel mould of Y-shaped column and pouring method thereof |
| CN110821040B (en) * | 2019-11-19 | 2021-07-06 | 天津市武清区建筑工程总公司 | Steel ladle beam supporting structure |
| CN110821039B (en) * | 2019-11-19 | 2021-07-13 | 天津市武清区建筑工程总公司 | Construction method of steel ladle beam supporting structure |
| CN114457956A (en) * | 2022-01-12 | 2022-05-10 | 中建八局西南建设工程有限公司 | Large-span special-shaped steel-concrete column and construction method thereof |
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