CN113482036A - Column base structure of reinforced concrete and construction method thereof - Google Patents
Column base structure of reinforced concrete and construction method thereof Download PDFInfo
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- CN113482036A CN113482036A CN202110813976.0A CN202110813976A CN113482036A CN 113482036 A CN113482036 A CN 113482036A CN 202110813976 A CN202110813976 A CN 202110813976A CN 113482036 A CN113482036 A CN 113482036A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
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- 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
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- E04B1/58—Connections for building structures in general of bar-shaped building elements
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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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Abstract
The invention relates to the technical field of buildings, in particular to a column base structure of reinforced concrete and a construction method thereof, which are used for carrying out structural transformation on a column base of a steel structure column, wherein the column base structure is positioned at the lower end of the steel structure column, the steel structure column is positioned at the upper part of a foundation, the foundation at least comprises a polygonal columnar structure, the column base structure comprises a column base bottom plate and a bottom rib plate, and the column base structure also comprises: the steel structure column comprises a first structure reinforcing component arranged at the joint of the foundation and the bottom of the steel structure column, a second structure reinforcing component arranged on the upper portion of the steel structure column, a plurality of reinforcing bars arranged on the upper portion of the foundation and the periphery of the bottom of the steel structure column, and column base outer-wrapped concrete. Through the strengthening mode of above-mentioned interior outer combination on the primary structure, form the whole of common atress, by a wide margin improved the bearing capacity and the rigidity of column base structure, simultaneously, utilize primary structure support system, reduce the damage to primary structure, reduce the concrete and cut the volume of removing to reduce construction work load, make the job site safety control more easily.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a column base structure of reinforced concrete and a construction method thereof.
Background
China is vast, earthquake activities in partial areas are frequent, countries put forward higher requirements on earthquake safety, society puts forward new requirements on earthquake safety, the earthquake bureau correspondingly revises 'Chinese earthquake motion parameter zone chart', a defense area in the Chinese earthquake motion parameter zone chart (GB 18306 + 2015) basically covers the national range, an original earthquake-proof non-defense area is adjusted to be a 6-degree defense area, the requirements on earthquake defense in partial areas are improved, and even higher requirements are met if the 6-degree earthquake-proof defense area is adjusted to be a 7-degree defense area and the like.
The column base is the important node of structure in the steel construction, and its effect is with post lower extreme effort: the bending moment, the axial force and the shearing force are effectively transmitted to the foundation, and the steel structure column and the foundation are reliably and effectively connected and act together to ensure that the upper structure bears the action of external force. Exposed column bases can be adopted when the definition of the angle of 6 and 7 degrees is carried out according to article 9.2.16 in the specification GB50011, wherein, the exposed column bases adopted by single-layer and multi-layer light steel structure buildings are more,
after the earthquake-resistant requirement is improved, the earthquake resistance of the corresponding column base node does not meet the requirement, and the column base is reinforced and strengthened for more important buildings such as hangars for parking civil aircrafts, so that the damages such as column base anchor bolt shearing, tension fracture and the like during earthquakes are avoided.
The conventional treatment method of the reinforcing column base is to increase anchor bolts, increase chemical anchor bolts by adopting a steel plate adhered to the edge of the lower column to convert bending moment into shearing force or increase longitudinal bars after chiseling a protective layer on the top of an original foundation column to weld and connect upwards and then pack concrete outside. The performance and the stress state of the anchor bolt determine the flexural mechanical property of the column base. When the steel column is large, when the earthquake action borne by the column base is large, the action bending moment is far larger than the plastic bending moment determined by the yielding of the anchor bolt, however, the ultimate bearing capacity of the column base bolt processed by the strengthening processing method cannot reach 1.2 times of the plastic yielding bearing capacity of the section of the column.
Disclosure of Invention
Technical problem to be solved
In view of the above disadvantages and shortcomings of the prior art, the present invention provides a column shoe structure of reinforced concrete, which solves the technical problem that the ultimate bearing capacity of a column shoe bolt processed by a common processing method of a reinforced column shoe cannot reach the expected plastic yield bearing capacity of a column section.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the utility model provides a reinforced concrete's column base structure, column base structure are located the lower extreme of steel construction post, and steel construction post is located basic upper portion, the basis includes polygon columnar structure at least, and column base structure includes column base bottom plate and bottom gusset, its characterized in that, column base structure still includes: the steel structure column comprises a first structure reinforcing component arranged at the joint of the foundation and the bottom of the steel structure column, a second structure reinforcing component arranged on the upper portion of the steel structure column, a plurality of reinforcing bars arranged on the upper portion of the foundation and the periphery of the bottom of the steel structure column, and column base outer-wrapped concrete.
The first structure reinforcing component comprises a plurality of preset first pattern steel plates, a plurality of preset second pattern steel plates, a plurality of third pattern steel plates and a plurality of anchor bolts; a plurality of first pattern steel plates are axially and fixedly connected to the foundation at equal intervals along the circumferential direction of the foundation, and the bottom edge and the inner side edge of each first pattern steel plate are respectively welded with the column base bottom plate and the bottom rib plate; second pattern steel plates are axially arranged at four corners of the foundation respectively; and a third patterned steel plate is orthogonally arranged on the outer side edge of each first patterned steel plate respectively and is anchored on the basis through anchor bolts.
The second structure reinforcing component comprises a cover plate and a plurality of rib plates, the cover plate is sleeved on the steel structure column, the plurality of rib plates are equidistantly vertically fixed on the cover plate, and the cover plate and the plurality of rib plates are fixedly connected with the steel structure column.
The column base structure further comprises a plurality of studs, and the studs are arranged on the steel structure column between the second structure reinforcing component and the first structure reinforcing component at equal intervals.
The reinforcing bars comprise longitudinal reinforcing steel bars, a plurality of stirrups and a plurality of tie bars; and bending the upper ends of the longitudinal steel bars, wherein the bending length is not less than 10 times of the diameter length of the longitudinal steel bars, and the longitudinal steel bars of the bent parts are fixedly connected with the cover plate.
The joint of the top end of the longitudinal steel bar and the cover plate is provided with an angle rib, the angle rib is subjected to bending treatment, the bending length is not less than 5 times of the diameter length of the angle rib, and the bending part is welded with the cover plate.
The stirrup adopts rectangle hoop and rhombus hoop, and is equipped with stirrup encryption district on vertical reinforcing bar top, and the fixed mode of stirrup adopts two U type stirrup overlap joint to weld.
One end of the inner side of the lacing wire arranged at the periphery of the steel structure column is fixed on the steel structure column in a welding mode; the tie bars are arranged at the lower ends of the longitudinal steel bars, and the peripheral tie bars of the foundation are implanted into the concrete of the foundation.
The concrete used for building the concrete wrapped outside the casting column base and the steel structure column concrete is fine stone concrete with the strength higher than C35, and the admixture is doped.
A construction method of a column base structure of reinforced concrete comprises the following steps:
s1: arranging a first structure reinforcing component at the joint of the foundation and the bottom of the steel structure column;
s2: a plurality of studs are arranged on the periphery of the steel structure column, and the studs are arranged at equal intervals;
s3: arranging a second structure reinforcing component at the periphery of the steel structure column;
s4: arranging a plurality of longitudinal steel bars on the periphery of the concrete column part at the upper part of the foundation and the bottom of the steel structure column, and implanting the lower ends of the longitudinal steel bars into the foundation; a plurality of stirrups and tie bars are arranged on the longitudinal steel bars;
s5: after S4, pouring concrete outside the column base, wherein the concrete is poured to the top of the cover plate;
s6: and after S5, performing concrete pouring on the steel structure column, and sealing the pouring hole by adopting a steel plate with the wall thickness not less than that of the steel structure column after the pouring is completed.
(III) advantageous effects
The invention has the beneficial effects that: the invention provides a column base structure of reinforced concrete, which extends the height of the upper section of a column base by additionally arranging a second structure reinforcing component on an original steel structure column, simultaneously additionally arranging longitudinal steel bars on the periphery of a foundation and the steel structure column, connecting the column base plate with the longitudinal steel bars to ensure that the second structure reinforcing component is connected with the column base plate to form a space truss, and anchoring the longitudinal steel bars to the foundation to ensure the effective transmission of load, obviously improve the rigidity and the bending resistance bearing capacity of the column base and enhance the structural rigidity and the integrity of the column base. Through the strengthening mode of the internal and external combination on the original structure, a common stressed whole is formed, and the bearing capacity and the rigidity of the column base structure are greatly improved.
The invention improves the bearing capacity and rigidity to a great extent, and simultaneously utilizes the original structure support system, thereby avoiding support, reducing the damage to the original structure, reducing the chiseling amount of concrete, reducing the construction workload and ensuring that the construction site is safe and easy to control.
Drawings
FIG. 1 is a schematic cross-sectional view of a column shoe structure of the present invention without reinforcing bars and with concrete poured thereon;
FIG. 2 is a perspective view of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the structure of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 6 is a cross-sectional view taken at C-C of FIG. 3;
FIG. 7 is a cross-sectional view taken at D-D in FIG. 3;
FIG. 8 is a schematic view of the steps of the construction method of the present invention.
[ description of reference ]
1: a steel structural column;
2: a cover plate;
3: a rib plate;
4: a stud;
5: a first pattern steel plate;
6: a third pattern steel plate;
7: a foundation;
8: stretching a rib;
9: hooping;
10: concrete is coated outside the column base;
11: longitudinal reinforcing steel bars;
12: a second pattern steel plate;
13: a bottom rib plate;
14: column base bottom plate.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings. In which the terms "upper", "lower", etc. are used herein with reference to the orientation of fig. 1.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1 to 7, the present invention provides a column shoe structure of reinforced concrete and a construction method thereof, which transforms and reforms the structure of an original column shoe, so that the original structure can be utilized to the maximum extent, and the waste of resources is avoided, and the construction method comprises the following specific steps:
s1: and removing the original encapsulated column base concrete, performing brushing treatment on the original concrete column pier surface, and excavating partial soil layer around the foundation 7 according to the actual survey condition and the design requirement.
S2: set up first structure reinforcing component in the 1 bottom of steel construction post and the 7 junction of basis, first structure reinforcing component includes that a plurality of predetermines first decorative pattern steel sheet 5, a plurality of predetermines second decorative pattern steel sheet 12, a plurality of third decorative pattern steel sheet 6 and a plurality of crab-bolt. The plurality of first pattern steel plates 5 are axially and fixedly connected to the foundation 7 at equal intervals along the four peripheries of the foundation 7, the column base structure comprises a column base bottom plate 14 and a bottom rib plate 13, and the bottom edge and the inner side edge of each first pattern steel plate 5 are respectively welded with the column base bottom plate 14 and the bottom rib plate 13; four corners of the foundation 7 are respectively provided with second pattern steel plates 12; and a third pattern steel plate 6 is orthogonally arranged on the outer side edge of each first pattern steel plate 5, and the third pattern steel plate 6 is anchored on a foundation 7 through anchor bolts so that the first pattern steel plate 5 is perpendicular to the third pattern steel plate 6.
The arrangement pitch of the first pattern steel plate 5 adopted in the embodiment is 200 mm; the first pattern steel plate 5 used in this embodiment has a size of 10 × 300mm, the second pattern steel plate 12 has a size of 10 × 400 × 300mm, and the third pattern steel plate 6 has a size of 10 × 750 × 80mm, and the above parameters may be adjusted according to actual design requirements.
S3: a plurality of studs 4 are additionally arranged on the periphery of the steel structure column 1, the studs 4 are welded with the steel structure column 1, and the studs 4 are arranged at equal intervals; the length of the studs 4 adopted in the implementation is 100mm, the diameter of the studs 4 is 19mm, and the vertical distance between the studs 4 is 120 mm.
S4: set up second structure reinforced component in steel structural column 1 periphery, including apron 2 and a plurality of gusset 3, 2 covers of apron are established on steel structural column 1, and the equidistant vertical fixation of a plurality of gusset 3 is on apron 2, and apron 2 and a plurality of gusset 3 weld with steel structural column 1.
In this embodiment, the distance between the rib plates 3 is 200mm, the size of the rib plates 3 is 20 × 250 × 300mm, the size of the cover plate 2 is 20 × 1200mm, and the above parameters can be adjusted according to actual design requirements.
S5: a plurality of longitudinal steel bars 11 are arranged on the concrete column part at the upper part of the foundation 7 and the periphery of the bottom of the steel structure column 1, the lower ends of the longitudinal steel bars 11 are implanted into the foundation 7, and the implantation length is 20 times of the diameter length of the longitudinal steel bars 11. And bending the upper end of the longitudinal steel bar 11, wherein the bending length is not less than 10 times of the diameter length of the longitudinal steel bar 11, and the longitudinal steel bar 11 at the bending part is welded with the cover plate 2. The joint of the top end of the longitudinal steel bar 11 and the cover plate 2 is provided with an angle rib, the angle rib is subjected to bending treatment, the bending length is not less than 5 times of the diameter length of the angle rib, and the bending part is welded with the cover plate 2.
The longitudinal steel bar 11 is provided with a plurality of stirrups 9 and tie bars 8, the stirrups 9 adopt rectangular hoops and rhombic hoops, a stirrup encryption area is arranged at the top end of the longitudinal steel bar 11, 3 stirrups 9 are used for encryption in the embodiment, and the distance between the stirrups 9 in the encryption area is 50 mm; the fixed mode of stirrup 9 adopts two U type stirrup overlap joints to weld, and two U type stirrups dock through the welded mode promptly, and the 9 intervals of stirrup in this embodiment non-encryption district are 100mm, and the 9 diameters of stirrup are 12 mm.
The diameter of the tie bars 8 is not less than 8mm, the longitudinal arrangement distance is not more than 300mm, wherein one end of the tie bars 8 arranged on the periphery of the steel structure column 1 is fixed on the steel structure column 1 in a welding mode; the lacing wires 8 arranged at the lower ends of the longitudinal steel bars 11 and at the periphery of the foundation 7 are implanted into the concrete at the bottom of the foundation 7.
S6: and after S5, building and pouring the column base outer-coated concrete 10 again, wherein the concrete is built and poured to the top of the cover plate 2, C35 micro-expansion shrinkage-free fine aggregate concrete is adopted for building and pouring in the implementation, and the concrete strength can be adjusted according to actual design requirements.
S7: after the construction and the pouring of the concrete 10 wrapped outside the column base are finished, the steel structure column 1 is subjected to the construction and the pouring of the reinforced concrete, the construction and the pouring height is set according to the actual design requirement, the size of a grouting hole is 50-80 mm, and after the grouting is finished, the grouting hole is sealed by a steel plate with the thickness not smaller than the wall thickness of the steel structure column 1; the embodiment adopts C35 micro-expansion non-shrinkage fine aggregate concrete for casting, and the concrete strength can be adjusted according to actual design requirements.
The invention improves the bearing capacity and rigidity to a great extent, simultaneously utilizes the original structure support system, avoids support, reduces the damage to the original structure, reduces the chiseling amount of concrete, reduces the construction workload, ensures that the construction site is safe and easy to control, has strong operability of the construction method, and basically does not occupy the use space.
The invention also includes a column shoe structure manufactured by the above construction method, which includes: first structure reinforcing component, a plurality of peg 4, second structure reinforcing component, a plurality of longitudinal reinforcement 11, a plurality of stirrup 9, a plurality of lacing wire 8, post-construction poured column base outsourcing concrete 10 and steel construction column concrete.
The first structure reinforcing component comprises a plurality of preset first pattern steel plates 5, a plurality of preset second pattern steel plates 12, a plurality of third pattern steel plates 6 and a plurality of anchor bolts. A plurality of first pattern steel plates 12 are axially and fixedly connected to the foundation 7 at equal intervals along the four peripheries of the foundation 7, and the bottom edge and the inner side edge are respectively welded with a column base bottom plate 14 and a bottom rib plate 13; four corners of the rectangular foundation 7 are respectively provided with second pattern steel plates 12; the outer side edges of each first figured steel plate 5 are respectively provided with a third figured steel plate 6 in an orthogonal mode, and the third figured steel plates 6 are anchored on a foundation 7 through anchor bolts, so that the first figured steel plates 5 are perpendicular to the third figured steel plates 6, and the connection between the column foot bottom plate 14 and a foundation concrete column is strengthened through arrangement of the first structure strengthening component, and the effective transmission of load is guaranteed.
The patterned steel plate adopted in the implementation is a Q355B-grade embossed thin steel plate, the thickness is not less than 10mm, the processing performance and the weldability of the steel plate meet the requirements of construction and specification, the embossing on the surface of the steel plate is beneficial to increasing the occlusion between the steel plate and concrete, and the surface of the embossed thin steel plate needs to be clean and has no defects of corrosion, pits or scratches and the like.
The second structure reinforced component comprises a cover plate 2 and a plurality of rib plates 3, the cover plate 2 is sleeved on the steel structure column, the plurality of rib plates 3 are equidistantly vertically fixed on the cover plate 2, and the cover plate 2 and the plurality of rib plates 3 are welded with the steel structure column 1. Add a plurality of pegs 4 in the steel construction post periphery between second structure reinforcing component and the first structure reinforcing component, peg 4 and steel construction post 1 welding, equidistant setting between peg 4, the setting of peg 4 can promote the wholeness between post-cast concrete and the steel construction post 1.
The column base and the concrete column on the upper portion of the foundation 7 are provided with a plurality of longitudinal steel bars 11, stirrups 9 and tie bars 8, the reinforcement number of the longitudinal steel bars 11, the stirrups 9 and the tie bars 8 is calculated according to relevant specifications and actual bearing capacity requirements, newly-added longitudinal steel bars 11 are configured according to the minimum reinforcement ratio of the specifications and calculation, the newly-added longitudinal steel bars 11 are welded with the newly-added cover plate 2, the cross-sectional area is properly enlarged, and the bearing area of the column base is enlarged.
The lower extreme of longitudinal reinforcement 11 is implanted in the basis 7, and the length of implanting is 20 times the diameter length of longitudinal reinforcement 11, extends the anchor of planting the muscle to basis 7 to guarantee that the load effectively transmits to the basis. And bending the upper end of the longitudinal steel bar 11, wherein the bending length is not less than 10 times of the diameter length of the longitudinal steel bar 11, and the longitudinal steel bar 11 at the bending part is welded with the cover plate 2. The joint of the top end of the longitudinal steel bar 11 and the cover plate 2 is provided with an angle bar, the angle bar is bent, the bent length is not less than 5 times of the diameter length of the angle bar, and the bent part is welded with the cover plate 2.
The periphery of the longitudinal steel bar 11 is provided with a plurality of stirrups 9 and tie bars 8, the stirrups 9 adopt rectangular hoops and rhombic hoops, a stirrup encryption area is arranged at the top end of the longitudinal steel bar 11, 3 stirrups 9 are used for encryption in the embodiment, and the distance between the stirrups 9 in the encryption area is 50 mm; the fixed mode of stirrup 9 adopts two U type stirrup overlap joints to weld, and two U type stirrups dock through the welded mode promptly, and the 9 intervals of stirrup in this embodiment non-encryption district are 100mm, and the 9 diameters of stirrup are 12 mm.
The diameter of the tie bars 8 is not less than 8mm, the longitudinal arrangement distance is not more than 300mm, wherein one end of the tie bars 8 arranged on the periphery of the steel structure column 1 is fixed on the steel structure column 1 in a welding mode; the tie bars 8 arranged at the lower ends of the longitudinal steel bars 11 and on the periphery of the foundation 7 are implanted into the concrete at the bottom of the foundation 7 so as to enhance the integrity between the newly added reinforcing bars and the foundation 7.
The upper section of the column base is extended by a certain height through the arrangement of the cover plate 2, the cover plate 2 is connected with the column base bottom plate 14 through the newly added longitudinal steel bars 11, so that the cover plate 2 and the column base bottom plate 14 are connected to form a space truss, the rigidity and the bending resistance bearing capacity of the column base are obviously improved through calculation, and the structural rigidity and the integrity of the column base are enhanced.
The steel bar models adopted by the embodiment are mainly T63/E/E/G steel bars, HRB400 steel bars and HPB300 steel bars. The T63/E/E/G steel bar has high strength and high ductility, can reduce the number of newly added main bars, can reduce the number of embedded bars by about 50 percent compared with HRB400 steel bars, meets the calculation and construction requirements, greatly reduces the construction difficulty and shortens the construction period.
The welding rods adopted by the welding of the embodiment are called E43 and E50 types, the adopted bolts are chemical bolts, the planting bars are made of A-grade planting bar glue, the strength grade of the stud is Q355B, and the type parameters can be adjusted according to actual construction requirements.
After the peripheral arrangement of reinforcement of basis 7 and steel construction post 1 is accomplished, build again in the column base periphery and water column base outsourcing concrete 10, the concrete is built and is watered to 2 tops of apron, with the reinforcement that strengthens adding and original concrete part's wholeness, after column base outsourcing concrete is built 10 and is watered and accomplish, follow-up building waters steel construction post concrete, so that basis 7, steel construction post 1, first structure reinforcing component, second structure reinforcing component and a plurality of arrangement of reinforcement that add form holistic steel construction rigidity column base, make the bearing capacity and the rigidity of column base obtain the improvement of great degree.
The concrete adopted in the implementation is micro-expansion and non-shrinkage fine stone concrete with the strength not lower than C35, and is doped with an additive, namely the anti-cracking anti-permeability durable core material, which is formed by compounding a super-active powder material and high-dispersion fibers treated by a special process, only 1kg of tensile fibers and 0.4kg of anti-permeability powder are needed to be added per cubic meter, the workability of the concrete can be obviously improved, the concrete is effectively prevented from segregation and bleeding, the compactness of the concrete is increased, the internal stress of the concrete is uniformly distributed in the hardening process, the capillary pore structure is greatly improved, the pore diameter and the total pore number are reduced, the self-compactness of the concrete is greatly improved, the early plastic shrinkage of the concrete (0-12h) is effectively reduced by about 40%, the temperature is increased adiabatically in the curing period of 0-28 d, the temperature of the concrete is averagely reduced by 1.7 ℃ every day, and the generation of micro cracks is really inhibited from the source, the later-period volume stability of the concrete is good.
The concrete is subjected to water-retaining self-curing, the early (0-12h) crack resistance is good, the crack reduction coefficient is more than 80%, the curing condition of newly added concrete is greatly reduced, the pollution of field construction is reduced, and the construction period is shortened.
According to the invention, by optimally configuring the material, the effects of less steel consumption, low cost and controllable quality are achieved, and the safety and the applicability of the structure are ensured.
According to the column base structure and the construction method thereof provided by the invention, the second structure reinforcing component is additionally arranged on the steel structure column 1, the upper section height of the column base is extended, meanwhile, the longitudinal steel bars 11 are additionally arranged on the column base and the periphery of the steel structure column 1, the longitudinal steel bars 11 are connected with the column base bottom plate 14, so that the second structure reinforcing component and the column base bottom plate 14 are connected to form a space truss, and the longitudinal steel bar planting bars are anchored to the foundation 7 to ensure the effective transmission of load, so that the rigidity and the bending resistance bearing capacity of the column base are obviously improved, and the structural rigidity and the integrity of the column base are enhanced.
The column base anti-seismic node formed by the column base structure and the construction method thereof provided by the invention has the advantages of simpler node form, direct force transmission, short path, good structural integrity, higher bearing capacity, material saving, low manufacturing cost, short construction period and convenience in construction.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a reinforced concrete's column base structure, column base structure are located the lower extreme of steel construction post (1), and steel construction post (1) is located basis (7) upper portion, basis (7) include polygon columnar structure at least, and column base structure includes column base bottom plate (14) and bottom gusset (13), its characterized in that, column base structure still includes: the steel structure column comprises a first structure reinforcing component arranged at the joint of the bottom of a foundation (7) and a steel structure column (1), a second structure reinforcing component arranged on the upper portion of the steel structure column (1), a plurality of reinforcing bars arranged on the upper portion of the foundation (7) and the periphery of the bottom of the steel structure column (1), and column foot outer-wrapped concrete (10).
2. The column shoe structure according to claim 1, characterized in that: the first structure reinforcing component comprises a plurality of preset first pattern steel plates (5), a plurality of preset second pattern steel plates (12), a plurality of third pattern steel plates (6) and a plurality of anchor bolts; the first pattern steel plates (5) are axially and fixedly connected to the foundation (7) at equal intervals along the circumferential direction of the foundation (7), and the bottom edge and the inner side edge of each first pattern steel plate (5) are respectively welded with the column base bottom plate (14) and the bottom rib plate (13); second pattern steel plates (12) are axially arranged at four corners of the foundation (7) respectively; and the outer side edge of each first pattern steel plate (5) is respectively provided with a third pattern steel plate (6) in an orthogonal manner, and the third pattern steel plate (6) is anchored on the basis through anchor bolts.
3. The column shoe structure according to claim 1, characterized in that: the second structure reinforcing component comprises a cover plate (2) and a plurality of rib plates (3), the cover plate (2) is sleeved on the steel structure column (1), the plurality of rib plates (3) are equidistantly vertically fixed on the cover plate (2), and the cover plate (2) and the plurality of rib plates (3) are fixedly connected with the steel structure column (1).
4. The column shoe structure according to claim 1, characterized in that: the column base structure further comprises a plurality of studs (4), and the studs (4) are arranged on the steel structure column between the second structure reinforcing component and the first structure reinforcing component at equal intervals.
5. The column shoe structure according to claim 1, characterized in that: the reinforcing bars comprise longitudinal reinforcing bars (11), a plurality of stirrups (9) and a plurality of tie bars (8); the upper end of the longitudinal steel bar (11) is bent, the bending length is not less than 10 times of the diameter length of the longitudinal steel bar (11), and the longitudinal steel bar (11) of the bent part is fixedly connected with the cover plate (2).
6. The column shoe structure according to claim 5, characterized in that: the joint of the top end of the longitudinal steel bar (11) and the cover plate (2) is provided with an angle rib, the angle rib is subjected to bending treatment, the bending length is not less than 5 times of the diameter length of the angle rib, and the bending part is welded with the cover plate (2).
7. The column shoe structure according to claim 5, characterized in that: the stirrup (9) adopts a rectangular hoop and a rhombic hoop, a stirrup encryption area is arranged at the top end of the longitudinal steel bar (11), and the fixing mode of the stirrup (9) adopts double-U-shaped stirrup lap welding.
8. The column shoe structure according to claim 5, characterized in that: one end of the inner side of the lacing wire (8) arranged on the periphery of the steel structure column (1) is fixed on the steel structure column (1) in a welding mode; the tie bars (8) are arranged at the lower ends of the longitudinal steel bars (11), and the peripheral tie bars (7) are implanted into the concrete of the foundation (7).
9. The column shoe structure according to claim 1, characterized in that: the concrete used for building the concrete (10) coated outside the column foot is fine stone concrete with the strength higher than C35, and is mixed with an additive.
10. A construction method of a column shoe structure of reinforced concrete for the column shoe structure of any one of claims 1 to 9, characterized by comprising the steps of:
s1: arranging a first structure reinforcing component at the joint of the foundation (7) and the bottom of the steel structure column (1);
s2: a plurality of studs (4) are arranged on the periphery of the steel structure column (1), and the studs (4) are arranged at equal intervals;
s3: a second structure reinforcing component is arranged on the periphery of the steel structure column (1);
s4: a plurality of longitudinal steel bars (11) are arranged on the periphery of the concrete column part at the upper part of the foundation (7) and the bottom of the steel structure column (1), and the lower ends of the longitudinal steel bars (11) are implanted into the foundation (7); a plurality of stirrups (9) and tie bars (8) are arranged on the longitudinal steel bars (11);
s5: after S4, pouring concrete (10) wrapped outside the column base, wherein the concrete is poured to the top of the cover plate (2);
s6: and after S5, performing concrete pouring on the steel structure column (1), and sealing the pouring hole by adopting a steel plate with the wall thickness not less than that of the steel structure column (1) after the concrete pouring is completed.
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