CN112538867B - Reverse construction method and structure of beam column joint in foundation pit - Google Patents
Reverse construction method and structure of beam column joint in foundation pit Download PDFInfo
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- CN112538867B CN112538867B CN202011276732.5A CN202011276732A CN112538867B CN 112538867 B CN112538867 B CN 112538867B CN 202011276732 A CN202011276732 A CN 202011276732A CN 112538867 B CN112538867 B CN 112538867B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
- E02D29/05—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench
- E02D29/055—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them at least part of the cross-section being constructed in an open excavation or from the ground surface, e.g. assembled in a trench further excavation of the cross-section proceeding underneath an already installed part of the structure, e.g. the roof of a tunnel
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
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Abstract
The invention discloses a reverse construction method and a structure of a beam column joint in a foundation pit, wherein the method comprises the following steps: welding an upper ring plate and a lower ring plate on the steel pipe; welding an upper sleeve connector on the upper ring plate and welding a lower sleeve connector on the lower ring plate; constructing a steel pipe concrete column, positioning the position of a structural beam to be constructed by monitoring the elevation of the steel pipe concrete column, constructing a main reinforcement of the structural beam, welding an upper row of steel bars on an upper skin of the steel bars on an upper ring plate and extending the steel bars to the steel pipe concrete column, and connecting a lower row of steel bars on the upper skin of the steel bars on an upper sleeve connector in a threaded manner; connecting the first row of steel bars of the lower skin steel bars on the lower sleeve connector in a threaded manner, and welding the second row of steel bars of the lower skin steel bars on the lower annular plate and extending the second row of steel bars to the steel tube concrete column; anchoring the column cap ring rib; constructing structural column reinforcing steel bars; and pouring concrete through the template to form the structural column, the structural beam and the column cap at the node of the structural beam. The invention can improve the connection quality and reliability of the nodes.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a reverse construction method and a structure of a beam column joint in a foundation pit.
Background
In the top-down construction method of the connection node of the structural column and the structural beam in the foundation pit, the steel pipe concrete column of the structural column is used as a vertical supporting system and is constructed from the ground before the foundation pit is excavated, and the vertical supporting system is used for bearing the vertical supporting in the top-down construction method. After the foundation pit is excavated to the beam bottom elevation of the structural beam, firstly welding a sleeve on the steel pipe concrete column between the beam top and the beam bottom of the structural beam to wrap the steel pipe concrete column, and then welding a ring plate at the elevation position of the sleeve corresponding to the main rib of the structural beam. The method directly performs welding operation on the steel pipe concrete column, and can cause adverse effect on the vertical supporting stress of the steel pipe concrete column. The connecting methods of the sleeve and the concrete-filled steel tubular column, the ring plate and the sleeve, and the ring plate and the main rib of the structural beam are all welding, the uncontrollable factors are more, and the welding quality is difficult to control. In most cases, the top-layer steel bars in the structural beam main bars of the reverse construction method are more and divided into two rows, so that the lower-row bar overhead welding condition exists in the structural beam main bar connection, and the quality control is difficult.
Disclosure of Invention
The invention aims to solve the technical problem of providing a reverse construction method and a structure of a beam column joint in a foundation pit so as to improve the connection quality and reliability of the joint.
In order to solve the technical problem, the invention provides a technical scheme that: a reverse construction method for beam column joints in a foundation pit comprises the following steps:
welding ring plates on steel pipes of a steel pipe concrete column of the structural column to be constructed, wherein the ring plates comprise upper ring plates and lower ring plates which are distributed on the steel pipes in a surrounding mode, and the distance between the upper ring plates and the lower ring plates is smaller than the thickness of the structural beam to be constructed;
the sleeve connectors are welded at the edge positions of the ring plates, so that the sleeve connectors are vertically distributed on two sides of the steel pipe along the direction of the structural beam to be constructed, and each sleeve connector comprises an upper sleeve connector welded on the upper ring plate and a lower sleeve connector welded on the lower ring plate;
constructing a steel pipe concrete column into the soil body along the ground or the ground of a foundation pit by using a steel pipe provided with a ring plate and a sleeve connector, and positioning the position of a structural beam to be constructed by monitoring the elevation of the steel pipe concrete column so as to enable an upper ring plate, a lower ring plate and an upper sleeve connector and a lower sleeve connector to be positioned in the structural beam area to be constructed;
excavating a soil body to a structural beam area to be constructed, and exposing the concrete-filled steel tubular column in the structural beam area to be constructed, and a ring plate and a sleeve connector on the concrete-filled steel tubular column;
Constructing a main reinforcement of the structural beam, welding upper rows of reinforcements of upper skin reinforcements of the main reinforcement of the structural beam on the upper ring plate and extending to the concrete-filled steel tubular column; connecting the lower row of steel bars of the upper steel bars of the main reinforcement of the structural beam to the upper sleeve connector in a threaded manner; connecting a first row of steel bars of lower skin steel bars of the main reinforcement of the structural beam on the lower sleeve connector in a threaded manner, and welding a second row of steel bars of the lower skin steel bars of the main reinforcement of the structural beam on the lower annular plate and extending to the concrete-filled steel tubular column;
anchoring column cap ring ribs on the main ribs of the structural beam;
constructing structural column reinforcing steel bars at the periphery of the steel pipe concrete column;
and pouring concrete on the structural column reinforcing steel bars, the column cap ring reinforcing steel bars and the structural beam main reinforcing steel bars through the template to form the structural column, the structural beam and the column caps at the joints of the structural column, the structural beam and the structural beam.
Furthermore, the invention provides a reverse construction method of beam-column joints in a foundation pit.
Furthermore, the invention provides a reverse construction method of beam-column joints in a foundation pit.
Further, according to the reverse construction method of the beam column node in the foundation pit, when the ring plate is welded on the steel pipe of the structural column to be constructed, the upper surface of the inner side of the ring plate is provided with the single-sided groove, and the upper surface of the ring plate is welded with the concrete-filled steel pipe column through the single-sided groove.
Further, according to the reverse construction method of the beam column joint in the foundation pit, when the ring plate is welded on the steel pipe of the structural column to be constructed, the lower surface seam between the ring plate and the steel pipe is welded through the annular gasket.
Further, according to the reverse construction method of the beam column joint in the foundation pit, the annular plate is composed of more than two sector plates, and joints between the adjacent sector plates are welded through strip-shaped gaskets.
Further, according to the reverse construction method of the beam-column joint in the foundation pit, when the main reinforcement of the structural beam is constructed, the upper row of reinforcement is welded on the upper surface or the lower surface of the upper ring plate; and the second row of steel bars are welded on the upper surface or the lower surface of the lower ring plate.
In order to solve the above technical problems, another technical solution provided by the present invention is: a construction structure of beam column node in foundation ditch includes:
the structure column comprises a steel pipe concrete column and structural column steel bars at the periphery of the steel pipe concrete column, a ring plate which is prefabricated and welded on the steel pipe concrete structure column, and a sleeve connector which is prefabricated and welded on the ring plate; the ring plate comprises an upper ring plate and a lower ring plate which are distributed on the concrete filled steel tubular column in a surrounding mode, and the sleeve connector comprises an upper sleeve connector welded on the upper ring plate and a lower sleeve connector welded on the lower ring plate;
The structural beam comprises structural beam main reinforcements, wherein the structural beam main reinforcements comprise upper skin reinforcements and lower skin reinforcements; the upper steel bars comprise upper rows of steel bars welded on the upper ring plate and extending to the concrete-filled steel tubular column and lower rows of steel bars in threaded connection with the upper sleeve connector; the lower rubber reinforcing steel bars comprise a first row of reinforcing steel bars in threaded connection with the lower sleeve connector and a second row of reinforcing steel bars welded on the lower annular plate and extending to the steel pipe concrete column;
the column cap comprises a column cap ring rib anchored on the main rib of the structural beam.
Further, according to the construction structure of the beam-column joint in the foundation pit, provided by the invention, the upper surface of the inner side of the ring plate is provided with the single-sided groove, and the upper surface of the ring plate is welded with the concrete-filled steel tubular column through the single-sided groove; and the lower surface joint between the ring plate and the concrete-filled steel tubular column is welded through an annular gasket.
Further, according to the construction structure of the beam-column joint in the foundation pit, provided by the invention, the annular plate is composed of more than two sector plates, and the joints between the adjacent sector plates are welded through the strip-shaped gaskets.
Compared with the prior art, the invention has the following beneficial effects:
before constructing the steel pipe concrete column, firstly arranging a ring plate and a sleeve connector on the steel pipe concrete column, and then positioning the position of a structural beam to be constructed by monitoring the elevation of the steel pipe concrete column so as to enable the upper ring plate, the lower ring plate, the upper sleeve connector and the lower sleeve connector to be positioned in the structural beam area to be constructed. Because only the ring plate is welded on the steel pipe of the steel pipe concrete column, and the sleeve connector is welded on the ring plate, the welding nodes on the steel pipe concrete column are reduced, and the welding quality and reliability of the ring plate and the reinforced concrete column and the ring plate and the sleeve connector can be improved. But also can avoid the adverse effect to the quality of the steel pipe concrete column when the annular plate and the sleeve are welded on the steel pipe concrete column simultaneously, thereby avoiding the adverse effect of more welding points on the vertical supporting stress of the steel pipe concrete column.
According to the reverse construction method of the beam column node in the foundation pit, only the ring plate is welded on the steel pipe of the steel pipe concrete column, and the ring plate is welded before the steel pipe concrete column is constructed, so that the welding quality and reliability of the ring plate and the reinforced concrete column can be improved, an enough operation space can be provided for the welding operation of the ring plate, the limitation of the foundation pit environment is avoided, and the welding construction difficulty is reduced.
According to the reverse construction method and the structure of the beam column joint in the foundation pit, the upper row of the upper reinforcing steel bars of the main reinforcing steel bars of the structural beam are welded with the upper ring plate, and the lower row of the upper reinforcing steel bars of the main reinforcing steel bars of the structural beam are in threaded connection with the upper sleeve connector, so that the overhead welding phenomenon caused by the lower row of the upper and lower rows of the upper reinforcing steel bars of the main reinforcing steel bars of the structural beam is avoided, and the connection quality and the reliability of the upper reinforcing steel bars of the main reinforcing steel bars of the structural beam are improved.
According to the reverse construction method and the structure of the beam column joint in the foundation pit, the first row of steel bars of the lower skin steel bars of the main ribs of the structural beam are in threaded connection with the lower sleeve connector, and the second row of steel bars of the lower skin steel bars of the main ribs of the structural beam are welded with the lower annular plate, so that the overhead welding phenomenon caused by the second row of steel bars in the upper and lower rows of steel bars of the lower skin steel bars of the main ribs of the structural beam is avoided, and the connection quality and the reliability of the lower skin steel bars of the main ribs of the structural beam are improved.
According to the reverse construction method and the structure of the beam-column joint in the foundation pit, the upper and lower double rows of steel bars in the upper and lower skin steel bars of the main reinforcement of the construction structural beam are respectively welded and connected in a threaded manner through the annular plate and the corresponding sleeve connectors thereof, the upper and lower double rows of steel bars are not required to be welded, and the main reinforcement of the structural beam can be reliably connected, so that the cross-sectional sizes of the column cap steel bars and the column caps thereof can be reduced, the influence on building structures such as stairs, shafts and the like is reduced, and the underground building space is increased. The size of a large column cap is not required to be set for ensuring the unstable connection quality and the uncertain reliability of the double-welding mode of the upper and lower rows of reinforcing steel bars.
According to the reverse construction method and the structure of the beam column joint in the foundation pit, provided by the invention, when the main reinforcement of the structural beam is constructed, a part of reinforcements are connected through the threads, so that the number of welding joints is reduced, and the defects of unstable welding quality and unreliable connection of one row of reinforcements in double rows of reinforcements are reduced.
According to the reverse construction method and the structure of the beam-column joint in the foundation pit, provided by the invention, the structural stability of the connecting joint is ensured through the column cap reinforcing steel bars anchored in the main reinforcing steel bars of the structural beam.
Drawings
FIG. 1 is a schematic front view of a steel pipe of a concrete filled steel tubular column and a ring plate and a sleeve connector thereon;
FIG. 2 is a schematic top view of a concrete filled steel tubular column with an annular plate and sleeve adapter thereon;
FIG. 3 is a schematic view of the construction of the ring plate;
FIG. 4 is a schematic structural view of a welded joint of a ring plate and a steel pipe;
FIG. 5 is a schematic view showing the construction of a concrete filled steel tubular column;
FIG. 6 is a schematic structural view of a concrete filled steel tubular column in an area where a structural beam is exposed during soil excavation;
FIG. 7 is a schematic cross-sectional structural view of a concrete filled steel tubular column and a collar plate thereon;
FIG. 8 is a schematic structural view of the connection state of the main reinforcement of the structural beam with the ring plate and the sleeve connector;
FIG. 9 is a schematic structural view of the upper row of reinforcement bars of the main reinforcement bars of the structural beam in a welded state with the upper ring plate;
fig. 10 is a schematic structural view of the state of the threaded connection between the lower row of steel bars of the main bar of the structural beam and the upper sleeve connector;
FIG. 11 is a schematic top view of a structural beam having cap bars disposed over the structural beam main bars;
FIG. 12 is a schematic structural view of a structural beam to structural column connection node;
shown in the figure:
100. the structure comprises a structural column, 110, a concrete-filled steel tubular column, 1101, a steel tube, 1102, rivets, 120, ring plates, 121, an upper ring plate, 122, a lower ring plate, 123, a groove, 124, a sector plate, 130, a sleeve connector, 131, an upper sleeve connector, 132, a lower sleeve connector, 140, an annular gasket, 150 and a strip-shaped gasket;
200. A structural beam; 201. the beam comprises a beam top 202, a beam bottom 210, an upper steel bar 211, an upper steel bar row 212, a lower steel bar row 220, a lower steel bar row 221, a first steel bar row 222 and a second steel bar row;
300. a cap 310, a cap ring rib;
400. and (4) soil body.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
example one
Referring to fig. 1, 5 to 12, an embodiment of the present invention provides a reverse construction method for a beam-column joint in a foundation pit, including:
step 501, referring to fig. 1, welding a ring plate 120 on a steel pipe 1101 of a concrete filled steel tubular column of a structural column to be constructed, where the ring plate 120 includes an upper ring plate 121 and a lower ring plate 122 that are distributed around the steel pipe 1101, and a distance between the upper ring plate 121 and the lower ring plate 122 is smaller than a thickness of a structural beam to be constructed.
Step 502, referring to fig. 1, the sleeve connectors 130 are welded at the edge positions of the ring plates 120, so that the sleeve connectors 130 are vertically distributed on two sides of the steel pipe 1101 along the direction of the structural beam to be constructed, and the sleeve connectors 130 include an upper sleeve connector 131 welded on the upper ring plate 121 and a lower sleeve connector 132 welded on the lower ring plate 122.
Step 503, referring to fig. 5, constructing a concrete filled steel tubular column 110 into the soil body 400 along the ground or the foundation pit ground through the steel tube 1101 provided with the ring plate 120 and the sleeve connector 130, and positioning the position of the structural beam to be constructed by monitoring the elevation of the concrete filled steel tubular column 110, so that the upper and lower ring plates 122 and the upper and lower sleeve connectors 132 are located in the structural beam area to be constructed. Wherein the beam region of the structure to be constructed is a distance from the top 201 to the bottom 202 in the longitudinal direction.
Step 504, please refer to fig. 5 to 7, the soil body 400 is excavated to the beam area of the structure to be constructed, and the steel pipe concrete column 110 in the beam area of the structure to be constructed, and the ring plate 120 and the sleeve connector 130 thereon are exposed.
Step 505, referring to fig. 8 to 10, constructing the main reinforcement of the structural beam, welding the upper row of reinforcement bars 211 of the upper reinforcement bar 210 of the main reinforcement of the structural beam on the upper ring plate 121 and extending to the steel pipe concrete column 110; screwing the lower row of steel bars 212 of the upper steel bars 210 of the main reinforcement of the structural beam onto the upper sleeve connector 131; the first row 221 of lower skin bars 220 of the structural beam main bars are threaded onto the lower sleeve connector 132 and the second row 222 of lower skin bars 220 of the structural beam main bars are welded to the lower collar plate 122 and extend onto the steel core concrete column 110.
Step 506, please refer to fig. 11, the column cap ring rib 310 is anchored on the main rib of the structural beam.
In step 507, structural column reinforcements (not shown) are constructed around the steel core concrete column 110.
Step 508, please refer to fig. 12, the structural column reinforcing bars, the column cap ring bars 310 and the structural beam main bars are concreted by the form to form the structural column 100, the structural beam 200 and the column cap 300 at the node thereof.
Referring to fig. 8, in the reverse construction method of the beam-column joint in the foundation pit according to the embodiment of the present invention, in constructing the main reinforcement of the structural beam 200, the upper steel bar 210 of the main reinforcement of the structural beam 200 may be anchored to the steel pipe concrete column 110 and the column cap ring reinforcement 310; the lower skin bars 220 of the main reinforcement of the structural beam 200 may also be anchored to the steel core concrete column 110 and the cap ring reinforcement 310. So as to increase the structural stability and the connection reliability of the main reinforcement of the structural beam.
Referring to fig. 2 and 4, in the reverse construction method of a beam-column joint in a foundation pit according to an embodiment of the present invention, when a ring plate 120 is welded on a steel pipe 1101 of a structural column 100 to be constructed, a single-sided groove is provided on an upper surface of an inner side of the ring plate 120, and the upper surface of the ring plate 120 is welded to a concrete-filled steel tubular column 110 through the single-sided groove. When the ring plate 120 is welded on the steel pipe 1101 of the structural column 100 to be constructed, the lower surface joint between the ring plate 120 and the steel pipe 1101 is welded by the ring-shaped spacer 140. That is, the ring plate 120 is welded on both sides, thereby improving the quality and reliability of the connection with the steel pipe 1101. Groove welding can improve the reliability of welding, can avoid leaking through annular gasket 140 welding and weld quality and reliability further improve.
Referring to fig. 2 and 3, in the reverse construction method of a beam-column joint in a foundation pit according to an embodiment of the present invention, the ring plate 120 is composed of two or more sector plates 124, and joints between adjacent sector plates 124 are welded by strip spacers 150. Wherein the strip-shaped spacers 150 can improve the reliability of the welding between the adjacent sector plates 124.
Referring to fig. 8, in the reverse construction method of a beam-column joint in a foundation pit according to an embodiment of the present invention, when constructing a main reinforcement of a structural beam 200, an upper row of reinforcement bars 211 are welded to an upper surface or a lower surface of an upper ring plate 121; the second row of reinforcing bars 222 are welded to the upper or lower surface of the lower ring plate 122.
Example two
Referring to fig. 1 to 12, a second embodiment of the present invention provides a construction structure of a beam-column joint in a foundation pit based on the first embodiment, including a structural column 100, a structural beam 200, and a column cap 300 of the joint.
Referring to fig. 1, 8 and 12, the structural column 100 includes a steel pipe concrete column 110 and its surrounding structural column steel bars, a ring plate 120 pre-welded to the steel pipe 1101 concrete structural column 100, and a sleeve connector pre-welded to the ring plate 120; the ring plate 120 includes an upper ring plate 121 and a lower ring plate 122 circumferentially distributed on the steel core concrete column 110, and the sleeve connector 130 includes an upper sleeve connector 131 welded to the upper ring plate 121 and a lower sleeve connector 132 welded to the lower ring plate 122.
Referring to fig. 8 and 12, the structural beam 200 includes structural beam main bars including upper skin bars 210 and lower skin bars 220; the upper reinforcing bars 210 comprise upper reinforcing bars 211 welded to the upper ring plate 121 and extending to the steel core concrete column 110 and lower reinforcing bars 212 screwed to the upper socket adapter 131; the lower skin rebar 220 includes a first row of rebar 221 threaded onto the lower sleeve connector 132 and a second row of rebar 222 welded to the lower ring plate 122 and extending to the steel core concrete column 110.
Referring to fig. 11 to 12, the cap 300 includes a cap ring rib 310 anchored on the main structural beam rib.
Referring to fig. 4, in the construction structure of a beam-column joint in a foundation pit according to the second embodiment of the present invention, a single-sided groove 123 is formed on the upper surface of the inner side of the ring plate 120, and the upper surface of the ring plate 120 is welded to the steel pipe concrete column 110 through the single-sided groove 123; the lower surface joint between the ring plate 120 and the concrete filled steel tubular column 110 is welded by a ring-shaped spacer 140.
Referring to fig. 2 to 3, in the construction structure of the beam-column joint in the foundation pit according to the second embodiment of the present invention, the ring plate 120 is composed of two or more sector plates 124, and joints between adjacent sector plates 124 are welded by the strip-shaped gasket 150.
In the reverse construction method and structure of the beam-column joint in the foundation pit provided in the first and second embodiments of the present invention, before the steel pipe concrete column 110 is constructed, the ring plate 120 and the sleeve connector 130 are first disposed on the steel pipe concrete column 110, and then the position of the structural beam 200 to be constructed is located by monitoring the elevation of the steel pipe concrete column 110, so that the upper and lower ring plates 122 and the upper and lower sleeve connectors 132 are located in the area of the structural beam 200 to be constructed. Since only the ring plate 120 is welded on the steel pipe 1101 of the steel pipe concrete column 110 and the sleeve connector 130 is welded on the ring plate 120, the welding nodes on the steel pipe concrete column 110 are reduced, and the welding quality and reliability of the ring plate 120 and the reinforced concrete column and the ring plate 120 and the sleeve connector 130 can be improved. But also can avoid the adverse effect on the quality of the steel pipe concrete column 110 when the ring plate 120 and the sleeve are welded on the steel pipe concrete column 110 at the same time, thereby avoiding the adverse effect of more welding points on the stress of the steel pipe concrete column 110 as a vertical support.
In the reverse construction method of the beam-column joint in the foundation pit provided by the embodiment of the invention, only the ring plate 120 is welded on the steel pipe 1101 of the steel pipe concrete column 110, and the ring plate 120 is welded before the steel pipe concrete column 110 is constructed, so that the welding quality and reliability of the ring plate 120 and the reinforced concrete column can be improved, an enough operation space can be provided for the welding operation of the ring plate 120, the limitation of the foundation pit environment is avoided, and the welding construction difficulty is reduced.
In the reverse construction method and structure of the beam-column joint in the foundation pit provided by the first and second embodiments of the present invention, the upper row of reinforcement bars 211 of the upper reinforcement bar 210 of the main reinforcement bar of the structural beam is welded to the upper ring plate 121, and the lower row of reinforcement bars 212 of the upper reinforcement bar 210 of the main reinforcement bar of the structural beam is in threaded connection with the upper sleeve connector 131, so that an overhead welding phenomenon caused by the lower row of reinforcement bars 212 in the upper and lower rows of reinforcement bars of the upper reinforcement bar 210 of the main reinforcement bar of the structural beam is avoided, and thus the connection quality and reliability of the upper reinforcement bar 210 of the main reinforcement bar of the structural beam are improved.
In the reverse construction method and structure of the beam-column joint in the foundation pit according to the first and second embodiments of the present invention, the first row 221 of the lower skin 220 of the main reinforcement of the structural beam is connected to the lower sleeve connector 132 through the screw thread, and the second row 222 of the lower skin 220 of the main reinforcement of the structural beam is welded to the lower ring plate 122, so as to avoid the overhead welding phenomenon caused by the second row 222 of the upper and lower rows of the lower skin 220 of the main reinforcement of the structural beam, thereby improving the connection quality and reliability of the lower skin 220 of the main reinforcement of the structural beam.
In the reverse construction method and structure of the beam-column joint in the foundation pit provided by the first and second embodiments of the present invention, the upper and lower double rows of steel bars in the upper and lower skin steel bars 220 of the main beam rib of the construction structure are respectively welded and screwed through the ring plate 120 and the corresponding sleeve connector 130, and the upper and lower double rows of steel bars are not required to be welded, and the main beam rib of the structure can be reliably connected, so that the cross-sectional dimensions of the cap steel bars 310 and the caps 300 thereof can be reduced, the influence on the building structures such as stairs, wells and the like can be reduced, and the underground building space can be increased. The size of the column cap 300 is not required to be larger in order to ensure unstable connection quality and uncertain reliability of a double-welding mode of upper and lower double rows of steel bars.
According to the reverse construction method and structure of the beam column joint in the foundation pit provided by the first embodiment and the second embodiment of the invention, when the main reinforcement of the structural beam is constructed, a part of reinforcements are connected through the threads, so that the number of welding joints is reduced, and the defects of unstable welding quality and unreliable connection of one row of reinforcements of the double rows of reinforcements are overcome.
The reverse construction method and structure of the beam-column joint in the foundation pit provided by the first embodiment and the second embodiment of the invention ensure the structural stability of the connection joint through the column cap steel bars 310 anchored in the main bars of the structural beam.
According to the reverse construction method and structure of the beam-column joint in the foundation pit provided by the first embodiment and the second embodiment of the invention, the steel bars welded on the annular plate 120 extend to the concrete-filled steel tubular column 110, so that the connection stability and reliability can be improved.
The present invention is not limited to the above-described embodiments, and various changes and modifications made within the scope of the present invention are within the scope of the present invention.
Claims (10)
1. A reverse construction method for beam column joints in a foundation pit is characterized by comprising the following steps:
welding ring plates on steel pipes of a steel pipe concrete column of the structural column to be constructed, wherein the ring plates comprise upper ring plates and lower ring plates which are distributed on the steel pipes in a surrounding mode, and the distance between the upper ring plates and the lower ring plates is smaller than the thickness of the structural beam to be constructed;
the sleeve connectors are welded at the edge positions of the ring plates, so that the sleeve connectors are vertically distributed on two sides of the steel pipe along the direction of the structural beam to be constructed, and each sleeve connector comprises an upper sleeve connector welded on the upper ring plate and a lower sleeve connector welded on the lower ring plate;
constructing a steel pipe concrete column into the soil body along the ground or the ground of a foundation pit by using a steel pipe provided with a ring plate and a sleeve connector, and positioning the position of a structural beam to be constructed by monitoring the elevation of the steel pipe concrete column so as to enable an upper ring plate, a lower ring plate and an upper sleeve connector and a lower sleeve connector to be positioned in the structural beam area to be constructed;
Excavating a soil body to a structural beam area to be constructed, exposing the concrete-filled steel tubular column in the structural beam area to be constructed, and an annular plate and a sleeve connector on the concrete-filled steel tubular column;
constructing a main reinforcement of the structural beam, welding upper rows of reinforcements of upper skin reinforcements of the main reinforcement of the structural beam on the upper ring plate and extending to the concrete-filled steel tubular column; connecting the lower row of steel bars of the upper steel bars of the main reinforcement of the structural beam to the upper sleeve connector in a threaded manner; connecting a first row of steel bars of lower skin steel bars of the main reinforcement of the structural beam on the lower sleeve connector in a threaded manner, and welding a second row of steel bars of the lower skin steel bars of the main reinforcement of the structural beam on the lower annular plate and extending to the concrete-filled steel tubular column;
anchoring a column cap ring rib on the main rib of the structural beam;
constructing structural column reinforcing steel bars at the periphery of the steel pipe concrete column;
and pouring concrete on the structural column reinforcing steel bars, the column cap ring reinforcing steel bars and the structural beam main reinforcing steel bars through the template to form the structural column, the structural beam and the column caps at the joints of the structural column, the structural beam and the structural beam.
2. The reverse construction method of a beam-column joint in a foundation pit according to claim 1, wherein in constructing the structural beam main reinforcement, an upper reinforcing bar of the structural beam main reinforcement is anchored to the steel pipe concrete column and the column cap ring reinforcement.
3. The reverse construction method of a beam-column joint in a foundation pit according to claim 1, wherein in constructing the structural beam main reinforcement, the lower skin reinforcement of the structural beam main reinforcement is anchored to the steel pipe concrete column and the column cap ring reinforcement.
4. The reverse construction method of a beam column joint in a foundation pit according to claim 1, wherein when a ring plate is welded on a steel pipe of a structural column to be constructed, a single-sided groove is formed on the upper surface of the inner side of the ring plate, and the upper surface of the ring plate is welded with the concrete-filled steel pipe column through the single-sided groove.
5. The reverse construction method of a beam column joint in a foundation pit according to claim 1, wherein when the ring plate is welded on the steel pipe of the structural column to be constructed, the lower surface joint between the ring plate and the steel pipe is welded by an annular gasket.
6. The reverse construction method of a beam-column joint in a foundation pit according to claim 1, wherein the ring plate is composed of more than two sector plates, and joints between adjacent sector plates are welded through strip-shaped gaskets.
7. The reverse construction method of a beam-column joint in a foundation pit according to claim 1, wherein when the main reinforcement of the structural beam is constructed, the upper row of reinforcement is welded to the upper surface or the lower surface of the upper ring plate; and the second row of steel bars are welded on the upper surface or the lower surface of the lower ring plate.
8. The utility model provides a construction structures of beam column node in foundation ditch which characterized in that includes:
the structure column comprises a steel pipe concrete column and structural column steel bars at the periphery of the steel pipe concrete column, a ring plate which is prefabricated and welded on the steel pipe concrete structure column, and a sleeve connector which is prefabricated and welded on the ring plate; the ring plate comprises an upper ring plate and a lower ring plate which are distributed on the concrete filled steel tubular column in a surrounding mode, and the sleeve connector comprises an upper sleeve connector welded on the upper ring plate and a lower sleeve connector welded on the lower ring plate;
The structural beam comprises structural beam main reinforcements, wherein the structural beam main reinforcements comprise upper skin reinforcements and lower skin reinforcements; the upper steel bars comprise upper rows of steel bars welded on the upper ring plate and extending to the concrete-filled steel tubular column and lower rows of steel bars in threaded connection with the upper sleeve connector; the lower skin steel bars comprise a first row of steel bars in threaded connection with the lower sleeve connector and a second row of steel bars welded on the lower ring plate and extending to the concrete-filled steel tubular column;
the column cap comprises column cap ring ribs anchored on the main ribs of the structural beam.
9. The construction structure of a beam-column joint in a foundation pit according to claim 8, wherein a single-sided groove is formed on the upper surface of the inner side of the ring plate, and the upper surface of the ring plate is welded with the concrete-filled steel tubular column through the single-sided groove; and the lower surface joint between the ring plate and the concrete-filled steel tubular column is welded through a ring-shaped gasket.
10. The construction structure of a beam-column joint in a foundation pit according to claim 8, wherein the ring plate is composed of more than two sector plates, and joints between the adjacent sector plates are welded through strip-shaped gaskets.
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| CN202011276732.5A CN112538867B (en) | 2020-11-16 | 2020-11-16 | Reverse construction method and structure of beam column joint in foundation pit |
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| CN103850351A (en) * | 2012-11-29 | 2014-06-11 | 中国核工业第二二建设有限公司 | Connecting device of concrete filled steel tubular column and reinforced concrete beam |
| CN103790379B (en) * | 2014-01-17 | 2016-05-11 | 上海建工二建集团有限公司 | In contrary sequence method without the construction method of connected node between beam slab and cap |
| CN105002930B (en) * | 2015-07-16 | 2017-03-29 | 上海建工四建集团有限公司 | The beam-column node structure built using steel loop plate and its method |
| CN105888080B (en) * | 2016-04-11 | 2018-01-19 | 青岛理工大学 | Assembled steel tube casing reinforced concrete combined joint and installation method |
| CN210562611U (en) * | 2019-03-01 | 2020-05-19 | 中建一局集团第三建筑有限公司 | Combined connection node of steel pipe column and frame beam |
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