CN106968267B - Combined stiffening core column and construction method - Google Patents
Combined stiffening core column and construction method Download PDFInfo
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- CN106968267B CN106968267B CN201710190381.8A CN201710190381A CN106968267B CN 106968267 B CN106968267 B CN 106968267B CN 201710190381 A CN201710190381 A CN 201710190381A CN 106968267 B CN106968267 B CN 106968267B
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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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
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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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
- 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
- E04B1/38—Connections for building structures in general
- 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
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
Abstract
The invention relates to a combined stiffening core column, which mainly comprises a pile foundation, a bearing platform, a steel pipe column, a steel pipe core column and a section steel core column; embedding and fixing steel pipes in the pile foundation; the embedded steel pipe is connected with a steel pipe column positioning bracket in the bearing platform; the upper part of the steel pipe column positioning bracket in the bearing platform is provided with a steel pipe column; the upper part of the steel pipe column is connected with a steel pipe core column; the upper part of the steel core column is connected with the steel core column. The invention belongs to the field of steel structure engineering, and aims at the construction methods of steel pipe columns, steel pipe core columns and steel core columns in high-rise and super-high-rise building structures, so that the engineering cost is effectively reduced, the construction speed is increased, and better technical and economic benefits can be obtained when the construction method is applied to actual engineering.
Description
Technical Field
The invention relates to a combined stiffening core column and a construction method, which belong to the field of steel structure engineering and are suitable for the construction of steel pipe columns, steel pipe core columns and steel core columns in high-rise and super high-rise building structures.
Background
With the continuous development of the building industry in China, newly built building styles are increasingly diversified, steel structures are widely applied to large public buildings, in order to meet building design requirements, the structural forms are simplified and complicated, the structural section is also changed from singleness to complexity, the exposed full transparent structural forms of structural bodies are increasingly used, and therefore higher requirements are put forward on the processing and the installation of the steel structures.
The steel structure is adopted by more and more buildings in terms of advantages such as short construction period, convenient construction, energy conservation, environmental protection, earthquake resistance, industrialized production and the like and recycling economy. The building structure form is gradually changed from the traditional reinforced concrete structure to the structure form of combining the steel structure and the reinforced concrete structure. In particular, in some high-rise and super-high-rise buildings, steel structures have taken the main position of engineering structures. In order to meet the requirements of the building in various aspects such as use functions, structural safety performance, appearance modeling and the like, when the traditional H-shaped and box-shaped steel beam steel members cannot meet the requirements, the form of the steel structure is also developed to be diversified, and some combined section steel members are gradually used in some large-scale projects.
Disclosure of Invention
The invention aims to solve the problem of construction of a combined stiffening core column, provides a combined stiffening core column and a construction method, and meets the requirements of structural construction.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the combined stiffening core column is characterized by mainly comprising a pile foundation 1, a bearing platform 9, a steel pipe column 12, a steel core column 29 and a steel core column 35; embedding a steel pipe 6 in the pile foundation 1; the embedded steel pipe 6 is connected with a steel pipe column positioning bracket 10 in a bearing platform 9; a steel pipe column 12 is arranged at the upper part of a steel pipe column positioning bracket 10 in the bearing platform 9; the upper part of the steel pipe column 12 is connected with a steel pipe core column 29; the upper part of the steel core column 29 is connected with a steel core column 35.
The bottom of the embedded steel pipe 6 is provided with a steel plate 3, and the steel plate 3 is welded with the reinforcement cage reinforcing ribs 2; the stud 5 arranged on the embedded steel pipe 6 is welded with the pile foundation main rib 4; a PVC isolation sleeve 20 is arranged outside the embedded steel pipe 6 at the chiseling position at the top of the pile foundation 1; a cushion layer 7 is arranged at the upper part of the pile foundation 1; a jacking connecting steel plate 19 arranged at the upper part of the embedded steel pipe 6 is welded and connected with an adjustable positioning support 18 arranged at the lower part of the steel pipe column positioning bracket 10; an integral connecting steel plate 15 is arranged at the upper part of the steel pipe column positioning bracket 10; a positioning steel block 14 is arranged on the integral connecting steel plate 15; the middle part of the steel pipe column positioning bracket 10 is provided with a bracket fixing ring plate 16; the water stop steel ring 8 is arranged on the steel pipe column positioning bracket 10.
The steel pipe column 12 is positioned through a positioning steel block 14; a steel pipe column connecting annular plate 11 is arranged at the lower part of the steel pipe column 12; the steel pipe column 12 is connected with the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 through the steel pipe column connecting bolt 13; the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 are welded and connected.
A notch is formed in the lower part of the steel pipe column 12; a positioning card 24 arranged on the lining tube 21 passes through the notch; the steel pipe columns 12 are connected through a lining pipe 21, a positioning clamp 24, an arc-shaped guard plate 25 and bolts 23 in a bolt welding way; when the steel pipe column 12 is installed, the positioning steel frame 27 and the jack 26 are adopted for auxiliary positioning installation.
The steel pipe column 12 and the steel pipe core column 29 are connected through a connecting fin 30; the connecting fins 30 are connected through the inner core tube 28; the lower connecting portions of the steel core pillars 29 and the inner core tubes 28 are provided with core tube inner connecting ring plates 31.
A steel bar positioning steel plate 42 is arranged at the connection part of the steel pipe core column 29 and the beam node; a straight thread sleeve 39 is welded on the steel bar positioning steel plate 42; the beam main rib 43 is connected with the steel bar positioning steel plate 42 through the straight thread sleeve 39; the steel bar positioning steel plate 42 is positioned by the positioning screw 41; the steel bar positioning steel plate 42, the steel pipe core column 29 and the tooth-shaped guard plate 40 are welded and fixed; the steel bar positioning steel plate 42 is provided with a vibrating hole 45; a tooth-shaped guard plate 40 is arranged at the joint of the steel tube core column 29 and the beam joint; the toothed shields 40 are connected by the inner core tube 28.
The steel pipe core column 29 and the section steel core column 35 are welded and connected; the steel connecting studs 34 arranged on the steel core column 35 are welded with the steel pipe core column stirrups 33.
The steel pipe core column 29 is provided with a column main rib 32, a column spiral rib 36 and a steel pipe core column connecting rib 37.
The steel core column 35 is provided with a steel section, a column main rib 32, a column spiral rib 36 and a steel core column stirrup 38.
The construction method of the combined stiffening core column is characterized by comprising the following steps of:
step one, processing of embedding steel pipes 6, steel pipe column positioning brackets 10, steel pipe column 12 column pipes, steel pipe core columns 29, profile steel core columns 35 and connecting fins 30: the embedded steel pipe 6 is made of phi 300 steel pipes, steel plates are welded at two ends, and a stud 5 is welded in the middle; the steel pipe column positioning bracket 10 is made of phi 80 steel pipes, an adjustable positioning bracket 18 is welded at the lower part, a jacking connecting steel plate 19 is welded at the lower part of the adjustable positioning bracket 18, an integral connecting steel plate 15 is welded at the upper part of the steel pipe column positioning bracket 10, a bracket fixing ring plate 16 is arranged at the middle part of the steel pipe column positioning bracket 10, and a water stop steel ring 8 is welded on the steel pipe column positioning bracket 10; manufacturing a steel pipe column 12 column pipe, wherein the welding of a steel plate coiled pipe adopts a submerged arc automatic welding method; the steel tube core column 29 is formed by rolling and welding steel plates; the section steel core column 35 is processed by sections, the length of each section is the layer height of the section steel core column, and the section steel core column is welded into a cross double H-shaped section steel column;
step two, pile foundation construction: embedding a built-in steel pipe 6 in the installation process of the reinforcement cage of the pile foundation 1, and welding a steel plate at the bottom of the built-in steel pipe 6 with the reinforcement cage reinforcing ribs 2; the stud 5 of the embedded steel pipe 6 is welded with the pile foundation main rib 4; the embedded steel pipe 6 at the chiseling position at the top of the pile foundation 1 is provided with a PVC isolation sleeve 20; then pile foundation concrete pouring is carried out;
step three, mounting a steel pipe column positioning bracket 10 and constructing a bearing platform 9: the pile head is chiseled out from the upper part of the pile foundation 1, then a cushion layer 7 is constructed, the upper part of the embedded steel pipe 6 and the lower part of the steel pipe column positioning bracket 10 are welded and installed through a jacking connecting steel plate 19, and then reinforcement binding, template installation and concrete pouring are carried out;
fourth, mounting the steel pipe column 12: the first section of steel pipe column 12 is positioned through a positioning steel block 14, the steel pipe column 12 is connected with a steel pipe column connecting ring plate 11 and an integral connecting steel plate 15 through bolts 13, and the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 are welded; the steel pipe columns 12 are positioned through the lining pipes 21 and the positioning clamps 24, are connected with the arc-shaped guard plates 25 through bolts 23, and are welded at the connection positions of the steel pipe columns 12 and the arc-shaped guard plates 25;
step five, connecting the steel pipe column 12 with a steel pipe core: the steel pipe column 12 and the steel pipe core column 29 are connected by a connecting fin 30; cutting 4 parts of the steel pipe column 12 along the axis at the end, arranging the top end of the steel pipe column 12 on the floor for 1 meter, inserting the connecting fins 30 into the steel pipe column 12 slots, fully welding the steel pipe column 12 slots and the connecting fins 30, and then carrying out steel bar binding, steel die mounting and concrete pouring on the section of column;
step six, connection of steel pipe core columns 29 at the junction of the upper layer beam column and the lower layer beam column: the steel bar positioning steel plate 42 is positioned through the positioning screw 41, the beam main rib 43 is connected with the steel bar positioning steel plate 42 through the straight thread sleeve 39, the steel bar positioning steel plate 42 is welded and fixed with the steel pipe core column 29 and the tooth-shaped guard plate 40, then the section is subjected to steel bar binding, steel mould installation and concrete pouring, and vibration is carried out through the vibration holes 45 on the steel bar positioning steel plate 42 in the concrete pouring process;
step seven, connection of the steel tube core column 29 and the section steel core column 35: at the junction of the steel tube core column 29 and the steel core column 35, 4 seam grooves are cut along the axis at the end of the steel tube core column 29, steel is inserted into the seam grooves and fully welded with a steel web during installation, and then the sections are subjected to steel bar binding, steel die installation and concrete pouring.
The invention has the following characteristics and beneficial effects:
(1) The steel pipe, the steel pipe core and the H-shaped steel core combined cylinder are stressed according to the relation of stress and steel consumption, so that the stress is feasible, economical and reasonable;
(2) The steel pipe column pipe, the steel pipe core, the fin core and other components are manufactured in a factory, so that the dimensional accuracy requirement can be ensured, the on-site installation is convenient, and the construction period and civilized construction are saved;
(3) The steel pipe column is connected with the steel pipe core stiffness column, and connection between each two sections of steel pipe core stiffness columns adopts a connection fin core connection construction process, so that the connection quality of the stiffness columns is ensured.
Drawings
FIG. 1 is a construction diagram of pile foundation and pile cap connected to a steel pipe column;
fig. 2 is a diagram showing a structure of connecting different diameter steel pipe columns;
FIG. 3 is a drawing of a connecting structure of a constant diameter steel pipe column;
FIG. 4 is a schematic view of the installation and positioning of a steel pipe column;
FIG. 5 is a diagram showing the structure of the connection between a steel pipe column and a steel pipe core;
FIG. 6 is a plan view of a steel pipe core column lintel node connection;
FIG. 7 is a cross-sectional view of a steel pipe core column lintel node connection;
FIG. 8 is a plan view of the connection of a steel core column and a section steel core column;
FIG. 9 is a face view of a steel tube core column and section steel core column connection;
FIG. 10 is a steel die pillar structure diagram;
FIG. 11 is a structural view of a section steel core column;
in the figure: 1-pile foundation; 2-reinforcing ribs of the steel reinforcement cage; 3-steel plate; 4-pile foundation main tendons; 5-pegs; 6-embedding and fixing the steel pipe; 7-cushion layer; 8-a water-stopping steel ring; 9-bearing platform; 10-a steel pipe column positioning bracket; 11-steel pipe column connecting ring plates; 12-a steel pipe column; 13-steel pipe column connecting bolts; 14-positioning a steel block; 15-integrally connecting steel plates; 16-a bracket fixing ring plate; 17-concrete; 18-an adjustable positioning support; 19-jacking a connecting steel plate; 20-PVC isolation sleeve; 21-an inner liner tube; 22-reducing steel pipe column; 23-bolts; 24-positioning card; 25-arc guard plates; 26-jack; 27-positioning steel frames; 28-an inner core tube; 29-a steel tube core column; 30-connecting fins; the inner part of the 31-core tube is connected with a ring plate; 32-column main ribs; 33-steel tube core column stirrups; 34-section steel connecting studs; 35-section steel core columns; 36-column spiral ribs; 37-steel tube core column connecting ribs; 38-type steel column stirrups; 39-a straight threaded sleeve; 40-tooth-shaped guard plates; 41-positioning a screw; 42-steel bar positioning steel plates; 43-beam main rib; 44-beam stirrups; 45-vibrating holes.
Detailed Description
In the embodiment of the present invention, the construction technical requirements of reinforcement binding, formwork support, concrete pouring, etc. are not repeated, and the embodiment of the present invention is mainly described, and the present invention is further described in detail by examples with reference to the accompanying drawings, and the description is not limited to the following examples.
Fig. 1 is a structure diagram of pile foundation and pile cap and steel pipe column connection, fig. 2 is a structure diagram of reducing steel pipe column connection, fig. 3 is a structure diagram of constant diameter steel pipe column connection, fig. 4 is a schematic diagram of steel pipe column installation and positioning, fig. 5 is a structure diagram of steel pipe column and steel pipe core connection, fig. 6 is a plan view of steel pipe core beam passing node connection, fig. 7 is a cross section view of steel pipe core beam passing node connection, fig. 8 is a plan view of steel pipe core column and steel pipe core column connection, fig. 9 is a face view of steel pipe core column and steel pipe core column connection, fig. 10 is a structure diagram of steel pipe core column, and fig. 11 is a structure diagram of steel pipe core column.
The combined stiffness core column shown in fig. 1 mainly comprises a pile foundation 1, a bearing platform 9, a steel pipe column 12, a steel core column 29 and a steel core column 35; embedding a steel pipe 6 in the pile foundation 1; the embedded steel pipe 6 is connected with a steel pipe column positioning bracket 10 in a bearing platform 9; a steel pipe column 12 is arranged at the upper part of a steel pipe column positioning bracket 10 in the bearing platform 9; the upper part of the steel pipe column 12 is connected with a steel pipe core column 29; the upper part of the steel core column 29 is connected with a steel core column 35.
The pile foundation 1 is embedded with a built-in steel pipe 6, a steel plate 3 is arranged at the bottom of the built-in steel pipe 6, and the steel plate 3 is welded with the reinforcement cage reinforcing ribs 2. The stud 5 arranged on the embedded steel pipe 6 is welded with the pile foundation main rib 4; a PVC isolation sleeve 20 is arranged outside the embedded steel pipe 6 at the chiseling position at the top of the pile foundation 1; a cushion layer 7 is arranged at the upper part of the pile foundation 1; a jacking connecting steel plate 19 arranged at the upper part of the embedded steel pipe 6 is welded with an adjustable positioning support 18 arranged at the lower part of the steel pipe column positioning support 10; an integral connecting steel plate 15 is arranged at the upper part of the steel pipe column positioning bracket 10; a positioning steel block 14 is arranged on the integral connecting steel plate 15; the middle part of the steel pipe column positioning bracket 10 is provided with a bracket fixing ring plate 16; the water stop steel ring 8 is arranged on the steel pipe column positioning bracket 10. The steel pipe column 12 is positioned by a positioning steel block 14; a steel pipe column connecting annular plate 11 is arranged at the lower part of the steel pipe column 12; the steel pipe column 12 is connected with the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 through the steel pipe column connecting bolt 13; the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 are welded and connected.
As shown in fig. 2 to 4, a notch is formed in the lower portion of the steel pipe column 12; a positioning card 24 arranged on the lining tube 21 passes through the notch; the steel pipe columns 12 are connected through a lining pipe 21, a positioning clamp 24, an arc-shaped guard plate 25 and bolts 23 in a bolt welding way; when the steel pipe column 12 is installed, the positioning steel frame 27 and the jack 26 are adopted for auxiliary positioning installation.
As shown in fig. 5, the steel pipe column 12 and the steel pipe core column 29 are connected by a connecting fin 30; the connecting fins 30 are connected through the inner core tube 28; the lower connecting portions of the steel core pillars 29 and the inner core tubes 28 are provided with core tube inner connecting ring plates 31.
As shown in fig. 6 to 7, a steel bar positioning steel plate 42 is arranged at the connection part of the steel tube core column 29 and the beam joint; a straight thread sleeve 39 is welded on the steel bar positioning steel plate 42; the beam main rib 43 is connected with the steel bar positioning steel plate 42 through the straight thread sleeve 39; the steel bar positioning steel plate 42 is positioned by the positioning screw 41; the steel bar positioning steel plate 42, the steel pipe core column 29 and the tooth-shaped guard plate 40 are welded and fixed; the steel bar positioning steel plate 42 is provided with a vibrating hole 45; a tooth-shaped guard plate 40 is arranged at the joint of the steel tube core column 29 and the beam joint; the toothed shields 40 are connected by the inner core tube 28.
As shown in fig. 8 to 9, the steel pipe core column 29 and the section steel core column 35 are connected by welding; the steel connecting studs 34 arranged on the steel core column 35 are welded and positioned with the steel pipe core column stirrups 33.
As shown in fig. 10, the steel pipe core column 29 is provided with a steel pipe core column 29, a column main rib 32, a column spiral rib 36, and a steel pipe core column connecting rib 37.
As shown in fig. 11, the steel core is provided with a section steel, a column main rib 32, a column spiral rib 36, and a section steel core column stirrup 38.
The main construction process of the combined stiffening core column construction is as follows:
step one, processing of embedding steel pipes 6, steel pipe column positioning brackets 10, steel pipe column 12 column pipes, steel pipe core columns 29, profile steel core columns 35 and connecting fins 30: the manufacturing method comprises the steps of manufacturing a built-in steel pipe 6, manufacturing the built-in steel pipe 6 by adopting a phi 300 steel pipe, welding steel plates at two ends and welding a stud 5 in the middle; the steel pipe column positioning bracket 10 is made of phi 80 steel pipes, an adjustable positioning bracket 18 is welded at the lower part of the steel pipes, a jacking connecting steel plate 19 is welded at the lower part of the adjustable positioning bracket 18, an integral connecting steel plate 15 is welded at the upper part of the steel pipe column positioning bracket 10, a bracket fixing ring plate 16 is arranged at the middle part of the steel pipe column positioning bracket 10, and a water stop steel ring 8 is welded on the steel pipe column positioning bracket 10; manufacturing a steel pipe column 12 column pipe, wherein the welding of a steel plate coiled pipe adopts a submerged arc automatic welding method, current, voltage and welding speed are operated according to technological parameters and related regulations during welding, all welding seams meet the requirements of primary welding seams, and 100% ultrasonic flaw detection is carried out according to regulations; manufacturing a steel tube core column 29, wherein the steel tube core is formed by rolling and welding a Q235B steel plate; manufacturing a profile steel core column 35; sectional machining of the profile steel core column 35, cutting one H-shaped profile steel into two T-shaped profile steels by adopting CO, wherein the length of each section is the layer height of each section 2 Welding the steel column into a cross double H-shaped section steel column by gas shielded welding; and (3) manufacturing the connecting fins 30, wherein the fin cores are formed by welding 4 steel plates in the radial direction of the seamless steel pipe, and the thickness and the length of the steel plates are according to design requirements. The fin core is used for connecting the steel pipe column 12 of the upper and lower layer columns with the steel pipe core column 29 and for connecting the steel pipe core column 29, and has a widthThe steel pipe column 12 extends out of the pipe by 10mm, meets the welding requirement, and the core pipe inner connecting ring plate 31 with a hole of phi 100mm is reserved in the center for sealing and welding the lower opening of the core pipe.
Step two, pile foundation construction: embedding a built-in steel pipe 6 in the installation process of the reinforcement cage of the pile foundation 1, and welding a steel plate at the bottom of the built-in steel pipe 6 with the reinforcement cage reinforcing ribs 2; the stud 5 of the embedded steel pipe 6 is welded with the pile foundation main rib 4; the embedded steel pipe 6 at the chiseling position at the top of the pile foundation 1 is provided with a PVC isolation sleeve 20; and then pile foundation concrete pouring is carried out.
Step three, mounting a steel pipe column positioning bracket 10 and constructing a bearing platform 9: pile head chiseling is carried out on the upper portion of the pile foundation 1, then a cushion layer 7 is constructed, the upper portion of the embedded steel pipe 6 and the lower portion of the steel pipe column positioning support 10 are welded and installed through a jacking connecting steel plate 19, and then steel bar binding, template installation and concrete pouring are carried out.
Fourth, mounting the steel pipe column 12: the first section of steel pipe column 12 is positioned through a positioning steel block 14, the steel pipe column 12 is connected with a steel pipe column connecting ring plate 11 and an integral connecting steel plate 15 through bolts 13, and the steel pipe column connecting ring plate 11 and the integral connecting steel plate 15 are welded; the steel pipe columns 12 are positioned through the lining pipes 21 and the positioning clamps 24, are connected with the arc-shaped guard plates 25 through bolts 23, and are welded at the connection positions of the steel pipe columns 12 and the arc-shaped guard plates 25.
Step five, connecting the steel pipe column 12 with a steel pipe core: the steel pipe column 12 and the steel pipe core column 29 are connected by a connecting fin 30. The steel pipe column 12 is cut into 4 slots along the axis at the end, the slot length is designed, the top end of the steel pipe column 12 is arranged on the floor for 1 meter, the steel pipe core column 29 of the connecting fin 30 core which is manufactured at the two ends in advance is inserted into the slots of the steel pipe column 12, the slots of the steel pipe column 12 and the connecting fin 30 are fully welded, the same roundness of three pipes is ensured, and then the sections of columns are subjected to steel bar binding, steel die mounting and concrete pouring.
Step six, connection of steel pipe core columns 29 at the junction of the upper layer beam column and the lower layer beam column: the steel bar positioning steel plate 42 is positioned through the positioning screw 41, the beam main rib 43 is connected with the steel bar positioning steel plate 42 through the straight thread sleeve 39, the steel bar positioning steel plate 42 is welded and fixed with the steel pipe core column 29 and the tooth-shaped guard plate 40, then steel bar binding, steel die installation and concrete pouring are carried out on the section, and vibration is carried out through the vibration holes 45 on the steel bar positioning steel plate 42 in the concrete pouring process.
Step seven, connection of the steel tube core column 29 and the section steel core column 35: at the junction of the steel tube core column 29 and the steel core column 35, a slot is cut 4 along the axis at the end of the steel tube core column 29, and the slot height is the design height. During installation, the section steel is inserted into the slot and fully welded with the section steel web, and then the section is subjected to steel bar binding, steel die installation and concrete pouring.
Claims (4)
1. The combined stiffening core column is characterized by mainly comprising a pile foundation (1), a bearing platform (9), a steel pipe column (12), a steel pipe core column (29) and a steel core column (35); embedding steel pipes (6) are embedded in the pile foundation (1); the embedded steel pipe (6) is connected with a steel pipe column positioning bracket (10) in the bearing platform (9); a steel pipe column (12) is arranged at the upper part of a steel pipe column positioning bracket (10) in the bearing platform (9); the upper part of the steel pipe column (12) is connected with a steel pipe core column (29); the upper part of the steel core column (29) is connected with a steel core column (35);
a steel plate (3) is arranged at the bottom of the embedded steel pipe (6), and the steel plate (3) is welded with the reinforcement cage reinforcing ribs (2); the stud (5) arranged on the embedded steel pipe (6) is welded with the pile foundation main rib (4); a PVC isolation sleeve (20) is arranged outside the embedded steel pipe (6) at the chiseling position at the top of the pile foundation (1); a cushion layer (7) is arranged at the upper part of the pile foundation (1); a jacking connecting steel plate (19) arranged at the upper part of the embedded steel pipe (6) is welded and connected with an adjustable positioning support (18) arranged at the lower part of the steel pipe column positioning bracket (10); an integral connecting steel plate (15) is arranged at the upper part of the steel pipe column positioning bracket (10); a positioning steel block (14) is arranged on the integral connecting steel plate (15); a bracket fixing ring plate (16) is arranged in the middle of the steel pipe column positioning bracket (10); a water stop steel ring (8) is arranged on the steel pipe column positioning bracket (10);
the steel pipe column (12) is positioned through a positioning steel block (14); a steel pipe column connecting annular plate (11) is arranged at the lower part of the steel pipe column (12); the steel pipe column (12) is connected with the steel pipe column connecting ring plate (11) and the integral connecting steel plate (15) through the steel pipe column connecting bolt (13); the steel pipe column connecting ring plate (11) is welded with the integral connecting steel plate (15);
the steel pipe column (12) is connected with the steel pipe core column (29) through a connecting fin (30); the connecting fins (30) are connected through an inner core tube (28); the connecting parts of the lower parts of the steel tube core column (29) and the inner core tube (28) are provided with a core tube inner connecting annular plate (31);
the steel pipe core column (29) and the section steel core column (35) are welded and connected; the profile steel connecting studs (34) arranged on the profile steel core column (35) are welded with the steel pipe core column stirrups (33);
the steel pipe core column (29) is provided with a column main rib (32), a column spiral rib (36) and a steel pipe core column connecting rib (37);
the steel core column (35) is provided with steel, column main ribs (32), column spiral ribs (36) and steel core column stirrups (38).
2. The combined strength core column according to claim 1, characterized in that the lower part of the steel pipe column (12) is provided with a notch; a positioning card (24) arranged on the lining tube (21) passes through the notch; the steel pipe columns (12) are connected through the lining pipe (21), the locating clamp (24), the arc-shaped guard plate (25) and the bolts (23) in a bolt welding mode.
3. A composite strength stem as claimed in claim 2, wherein the steel stem (29) and beam node connection is provided with a steel bar locating steel plate (42); a straight thread sleeve (39) is welded on the steel bar positioning steel plate (42); the beam main rib (43) is connected with a steel bar positioning steel plate (42) through a straight thread sleeve (39); the steel bar positioning steel plate (42) is positioned by a positioning screw (41); the steel bar positioning steel plate (42) is welded and fixed with the steel pipe core column (29) and the tooth-shaped guard plate (40); a vibrating hole (45) is arranged on the steel bar positioning steel plate (42); a toothed guard plate (40) is arranged at the joint of the steel tube core column (29) and the beam node; the tooth-shaped guard plates (40) are connected through the inner core tube (28).
4. A method of constructing a composite stiffened stem as defined in claim 3, comprising the steps of:
step one, processing a built-in steel pipe (6), a steel pipe column positioning bracket (10), a steel pipe column (12) column pipe, a steel pipe core column (29), a steel core column (35) and a connecting fin (30): the embedded steel pipe (6) is made of phi 300 steel pipe, steel plates are welded at two ends, and a stud (5) is welded in the middle; the steel pipe column positioning bracket (10) is made of phi 80 steel pipes, an adjustable positioning bracket (18) is welded at the lower part, a jacking connecting steel plate (19) is welded at the lower part of the adjustable positioning bracket (18), an integral connecting steel plate (15) is welded at the upper part of the steel pipe column positioning bracket (10), a bracket fixing ring plate (16) is arranged at the middle part of the steel pipe column positioning bracket (10), and a water stopping steel ring (8) is welded on the steel pipe column positioning bracket (10); manufacturing a steel pipe column (12) column pipe, wherein the welding of the steel plate coiled pipe adopts a submerged arc automatic welding method; the steel tube core column (29) is formed by rolling and welding steel plates; the section steel core column (35) is processed in a sectional way, and each section length is the layer height of the section steel core column, and is welded into a cross double H-shaped section steel column;
step two, pile foundation construction: embedding a steel pipe (6) in the installation process of the reinforcement cage of the pile foundation (1), and welding a steel plate at the bottom of the embedded steel pipe (6) with the reinforcement cage reinforcing ribs (2); the stud (5) embedded with the steel pipe (6) is welded with the pile foundation main rib (4); a PVC isolation sleeve (20) is arranged on the embedded steel pipe (6) at the chiseling position at the top of the pile foundation (1); then pile foundation concrete pouring is carried out;
step three, installing a steel pipe column positioning bracket (10) and constructing a bearing platform (9): the pile head is chiseled out from the upper part of the pile foundation (1), then a cushion layer (7) is constructed, the upper part of the embedded steel pipe (6) and the lower part of the steel pipe column positioning bracket (10) are welded and installed through a jacking connecting steel plate (19), and then reinforcement binding, template installation and concrete pouring are carried out;
fourth, mounting the steel pipe column (12): the first section of steel pipe column (12) is positioned through a positioning steel block (14), the steel pipe column (12) is connected with a steel pipe column connecting ring plate (11) and an integral connecting steel plate (15) through a steel pipe column connecting bolt (13), and the steel pipe column connecting ring plate (11) and the integral connecting steel plate (15) are welded; the steel pipe columns (12) are positioned through the lining pipes (21) and the positioning clamps (24), are connected with the arc-shaped guard plates (25) through bolts (23), and are welded at the connection positions of the steel pipe columns (12) and the arc-shaped guard plates (25);
step five, connecting the steel pipe column (12) with the steel pipe core column: the steel pipe column (12) and the steel pipe core column (29) are connected by a connecting fin (30); cutting a 4-position slot on the end head of the steel pipe column (12) along the axis, arranging the top end of the steel pipe column (12) on the floor for 1 meter, inserting a connecting fin (30) into the slot of the steel pipe column (12), fully welding the slot of the steel pipe column (12) and the connecting fin (30), and then carrying out steel bar binding, steel die mounting and concrete pouring on the section of column;
step six, connecting steel pipe core columns (29) at the joints of the upper layer beam column and the lower layer beam column: the steel bar positioning steel plate (42) is positioned through a positioning screw (41), the beam main rib (43) is connected with the steel bar positioning steel plate (42) through a straight thread sleeve (39), the steel bar positioning steel plate (42) is welded and fixed with the steel pipe core column (29) and the tooth-shaped guard plate (40), then steel bar binding, steel die installation and concrete pouring are carried out on the section, and vibration is carried out through a vibration hole (45) on the steel bar positioning steel plate (42) in the concrete pouring process;
step seven, connecting the steel tube core column (29) with the profile steel core column (35): at the junction of steel tube core column (29) and shaped steel core column (35), cut 4 department slot along the axis at steel tube core column (29) end, insert shaped steel to the slot and make slot and shaped steel web full weld during the installation, carry out reinforcement, steel mould installation and concrete placement to this section afterwards.
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