CN113389406A - Joist column pulling construction method - Google Patents
Joist column pulling construction method Download PDFInfo
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- CN113389406A CN113389406A CN202110672742.9A CN202110672742A CN113389406A CN 113389406 A CN113389406 A CN 113389406A CN 202110672742 A CN202110672742 A CN 202110672742A CN 113389406 A CN113389406 A CN 113389406A
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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
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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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
- E04G23/00—Working measures on existing buildings
- E04G23/04—Propping of endangered or damaged buildings or building parts, e.g. with respect to air-raid action
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Abstract
The application relates to a joist column pulling construction method, which comprises the following steps: s1, mounting the steel beam: installing anchor ears at the tops of four original structural columns, connecting steel beams at the end parts of the anchor ears, extending one ends of the steel beams far away from the anchor ears to positions close to the columns to be pulled, and fitting the steel beams with the original structural beams; s2, mounting a temporary support column: installing temporary support columns around the column to be pulled so that the temporary support columns bear the steel beam; s3, steel plate wrapping: wrapping a steel plate outside the outer surface of the original structural beam, and connecting the steel plate with the original structural beam by using a chemical anchor bolt; s4, cutting the column to be pulled: after the support is stable, cutting off the column to be pulled by using a cutting tool; s5, mounting the cross steel beam: after the column to be pulled is cut off, a cross steel beam is arranged on the bottom surface of the intersection of the original structural beam; s6, injecting steel pouring glue: pouring steel pouring glue between the steel plate and the original structural beam; s7, removing the temporary support column; and S8, measuring the stress and deflection of the combined beam. The application has the effects of simple construction process and reduced workload.
Description
Technical Field
The application relates to the field of transformation construction, in particular to a joist column pulling construction method.
Background
The joist pulls out the post and does not tear or tear down superstructure condition under few, demolish the structural spandrel column. Compared with the traditional large-lift cover transformation, the joist pillar pulling method has the advantages of small influence on production and life, small influence on the original structure, short construction period, low cost and the like, but the technical requirements are very high in implementation and the safety measures must be strict.
At present, a underpinning steel support system generally adopted by a joist pull column is provided with a conventional steel pipe fastener full scaffold support, a temporary reinforced concrete structure column support, an haunching steel corbel steel support and the like, but has the defects of complicated working procedures and large workload in practical application.
In view of the above-mentioned related technologies, the inventor believes that the existing joist post-pulling construction has the disadvantages of complicated process and large workload.
Disclosure of Invention
In order to solve the technical problems that the procedure for pulling out the column from the joist is complicated and the workload is large, the application provides a construction method for pulling out the column from the joist.
The application provides a joist pulls out post construction method, adopts following technical scheme:
a joist column pulling construction method comprises the following steps:
s1, installing the hoop and the steel beam: installing anchor ears at the tops of four original structural columns, connecting steel beams at one ends of the anchor ears, extending one ends of the steel beams far away from the anchor ears to positions close to the columns to be pulled, and fitting the steel beams with the original structural beams;
s2, mounting a temporary support column: installing temporary support columns around the column to be pulled so that the temporary support columns bear the steel beam;
s3, steel plate wrapping: coating a steel plate on the outer surface of the original structural beam, attaching the steel plate to the original structural beam, and connecting the steel plate with the original structural beam by using a chemical anchor bolt;
s4, cutting the column to be pulled: after the support is stable, cutting off the column to be pulled by using a cutting tool;
s5, mounting the cross steel beam: after a column to be pulled out is cut off, a cross-shaped steel beam is arranged on the bottom surface of the cross part of the original structural beam, four end surfaces of the cross-shaped steel beam are respectively welded with the end surfaces of four steel beams, and the four installed steel beams are welded with a hoop;
s6, injecting steel pouring glue: pouring steel pouring glue between the steel plate and the original structural beam, so that the original structural beam and the steel plate form a whole;
s7, removing the temporary support column: after the cross steel beam is installed, the temporary support columns are dismantled;
and S8, measuring the stress and deflection of the combined beam.
By adopting the technical scheme, the temporary support columns are used for temporarily supporting the combined beam formed by combining the steel beam and the original structural beam, then the column to be pulled is cut, the original structural beam and the steel plate are tightly and effectively combined into a whole, the bearing capacity of the combined beam is enhanced, and the structure can be effectively borne;
in addition, the beam section of the original structural beam is increased by combining the steel beam with the original structural beam, and the stable supporting original structure can be used for preventing the original structure from being damaged after the column to be pulled out is cut off.
Optionally, in step S1, the hoop includes an installation section and a horizontal section, the installation section includes a circular top plate and a circular bottom plate, a connecting plate is welded between the circular bottom plate and the circular top plate, a cylinder is welded to the lower surface of the circular bottom plate, the horizontal section and the installation section are integrally formed, and the horizontal section is disposed on the bottom surface of the original structural beam.
Through adopting above-mentioned technical scheme, the environmental protection that staple bolt installation section can stabilize is on original structure post, and the horizontal segment can be used for welding the girder steel, makes original structure post can bearing girder steel.
Optionally, the cylinder is connected to the original structural column using a chemical anchor.
Through adopting above-mentioned technical scheme, chemistry crab-bolt can be with drum and original structure column attach firmly to with the staple bolt in original structure column connection.
Optionally, in step S1, the steel beam is connected to the horizontal section, the steel beam includes an upper flange plate and a lower flange plate, a web is welded between the upper flange plate and the lower flange plate, the web is arranged in the same direction as the upper flange plate and the lower flange plate, and the web is perpendicular to the upper flange plate and the lower flange plate.
Through adopting above-mentioned technical scheme, the web is welded between the upper flange board and the lower flange board of girder steel, forms I shape structure, and structural strength is high.
Optionally, in step S2, the temporary supporting column includes a base, a column fixed on the base, and a jack disposed on a top surface of the column.
Through adopting above-mentioned technical scheme, base and ground firm in connection, the cylinder can play the supporting role, can guarantee after the jack pressurization that the temporary support post plays the bearing effect to the girder steel.
Optionally, in step S2, protective plates are respectively fixedly disposed around the jacks.
Through adopting above-mentioned technical scheme, the protection shield can block the jack, and the protection jack does not take place to incline because of receiving external force when the construction.
Optionally, in step S3, steel plates are respectively installed on the top surface and both sides of the original structural beam, chemical anchors are used to connect the steel plates to the original structural beam, and the steel plates on both sides of the original structural beam are welded to the top surface of the steel beam.
Through adopting above-mentioned technical scheme, use chemical crab-bolt can be closely connected steel sheet and original structure roof beam, form wholly.
Optionally, in step S6, a pressure glue injection is used to inject the steel potting glue.
Through adopting above-mentioned technical scheme, adopt pressure injecting glue can make the steel of irritating glue fully fill the gap between steel sheet and the original structure roof beam, further reinforcing steel sheet and original structure roof beam be connected.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the temporary support columns are used for temporarily supporting the steel beam and the original structural beam, so that the column to be pulled out is pulled out, the steel beam and the original structural beam are combined together to form a combined beam, the beam section of the original structural beam is increased, and the combined beam can support the original structure after the column to be pulled out is pulled out, so that the original structure is not damaged;
2. the steel pouring glue is injected in a pressure glue injection mode, so that the steel pouring glue can fully fill gaps between the steel plates and the original structural beams, and the steel beams are more tightly combined with the original structural beams;
3. through using chemical crab-bolt to connect girder steel and original structure roof beam, firm in connection.
Drawings
Fig. 1 is a perspective view of an original frame structure.
Figure 2 is this application installation girder steel spatial structure sketch map.
Fig. 3 is a schematic perspective view of the hoop and steel beam.
Fig. 4 is a perspective view of the temporary support column for installation.
Fig. 5 is a schematic perspective view of a temporary support column.
Fig. 6 is a schematic perspective view of an original beam-wrapped steel plate.
FIG. 7 is a schematic perspective view of the column to be pulled after the cross-shaped steel beam is installed and cut off.
Fig. 8 is a schematic perspective view of the construction of the present application.
Description of reference numerals: 1. a circular structural main beam; 2. a column of original structure; 3. the original structural beam; 4. a column to be pulled out; 5. hooping; 51. an installation section; 511. a circular top plate; 512. a circular base plate; 513. a cylinder; 514. a connecting plate; 52. a horizontal segment; 521. a horizontal section top plate; 522. a horizontal section floor; 6. a steel beam; 61. an upper flange plate; 62. a lower flange plate; 63. a web; 64. a reinforcing plate; 7. a temporary support post; 71. a base; 72. a first platen; 73. a cylinder; 74. a second platen; 75. a jack; 76. a pressure gauge; 77. a protection plate; 8. a steel plate; 9. a cross steel beam.
Detailed Description
The present application is described in further detail below with reference to figures 1-8.
Referring to fig. 1, a conventional transformation project is a circular frame structure, four original structural columns 2 are distributed at the bottom of a main beam 1 of the circular structure in an array mode, original structural beams 3 are connected between the corresponding original structural columns 2 respectively, columns 4 are to be pulled out of the cross positions of the two original structural beams 3, the columns 4 to be pulled out are cut off, and the floor using area is increased.
The embodiment of the application discloses a joist column pulling construction method. A joist column pulling construction method comprises the following steps:
s1, installing the hoop and the steel beam: referring to fig. 2 and 3, firstly, installing the hoop 5 on four original structural columns 2, wherein the hoop 5 comprises an installation section 51 and a horizontal section 52, the installation section 51 comprises a circular top plate 511 and a circular bottom plate 512, a connecting plate 514 is welded between the circular top plate 511 and the circular bottom plate 512, and the circular top plate 511 and the circular bottom plate 512 are connected into a whole by the connecting plate 514; the circular top plate 511 is integrally formed with a horizontal section top plate 521, the circular bottom plate 512 is integrally formed with a horizontal section bottom plate 522, and a connecting plate 514 is also connected between the horizontal section top plate 521 and the horizontal section bottom plate 522. A cylinder 513 is welded on the bottom surface of the circular bottom plate 512, and the cylinder 513 is bolted with the original structural column 2.
Welding one end of the steel beam 6 with one end of the horizontal section 52 far away from the installation section 51, enabling the upper flange plate 61 to be attached to the bottom surface of the original structural beam 3, arranging two rows of anchor bolt holes on the bottom surface of the original structural beam 3, arranging the two rows of anchor bolt holes at positions close to two ends of the bottom surface of the original structural beam 3, arranging through holes on the upper flange plate 61 of the steel beam 6, enabling the through holes to be in one-to-one correspondence with the positions of the anchor bolt holes, placing chemical medicine tubes in the anchor bolt holes, and then anchoring the chemical anchor bolts into the anchor bolt holes, thereby connecting the steel beam 6 with the original structural beam 3.
S2, mounting a temporary support column: referring to fig. 4 and 5, the temporary support columns 7 are installed around the column 4 to be pulled out and are arranged close to the column 4 to be pulled out, each temporary support column 7 comprises a base 71, each base 71 comprises two i-beams which are arranged in a cross mode, the two i-beams are perpendicular to each other, one flange plate of each i-beam is fixedly connected with the ground through expansion bolts, and the four bases 71 are arranged, located around the column 4 to be pulled out and located under the steel beam 6.
The top surface of the base 71 is respectively welded with a first platform plate 72, the first platform plate 72 is a square plate, then a cylinder 73 is respectively welded on the first platform plate 72, the cylinder 73 is a circular steel column, the cylinder 73 is vertically arranged, the top surface of the cylinder 73 is welded with a second platform plate 74, the second platform plate 74 is a square plate, a jack 75 is fixedly arranged at the center of the second platform plate 74, the jack 75 is used for bearing the steel beam 6, a pressure gauge 76 is fixedly arranged on one side of the jack 75, the pressure gauge 76 can play a role in real-time monitoring, protective plates 77 are fixedly arranged at positions, close to four corners, of the second platform plate 74, the protective plates 77 are strip-shaped plates, one ends of the protective plates are welded with the platform plates, the other ends of the protective plates are welded with the lower flange plate 62 of the steel beam 6, the protective plates 77 can play a role in protecting the jack 75, and the jack 75 is prevented from being touched to incline during construction.
S3, steel plate wrapping: referring to fig. 6, firstly, steel plates 8 are respectively wrapped at two sides of an original structural beam 3, a plurality of anchor bolt holes are respectively arranged at two sides of the original structural beam 3, the anchor bolt holes are arranged in a quincunx shape, a plurality of through holes are arranged on the steel plates 8, the through holes correspond to the anchor bolt holes in a one-to-one mode, chemical medicine pipes are placed in the anchor bolt holes, then the steel plates 8 are attached to the side surfaces of the original structural beam 3, chemical anchor bolts are penetrated, the steel plates 8 are fixedly connected with the original structural beam 3, and the bottom edges of the two steel plates 8 are respectively welded with the top surfaces of upper flange plates 61 of the steel beams 6; then set up a plurality of anchor bolt holes at 3 top surfaces of original structure roof beams, a plurality of anchor bolt holes are the quincunx and arrange, set up a plurality of through-holes on steel sheet 8, through-hole and anchor bolt hole position one-to-one, then establish 3 top surfaces of original structure roof beams with 8 lids of steel sheet, and make the laminating of steel sheet 8 and 3 top surfaces of original structure roof beams, weld two sides of steel sheet 8 and the edge that the steel sheet 8 of installing in 3 both sides of original structure roof beams is close to 3 top surfaces of original structure roof beams, put into the chemical pipe in the anchor bolt hole, then wear to establish the crab-bolt, with 8 and 3 top surfaces fixed connection of original structure roof beams of steel sheet 8.
S4, cutting the column to be pulled: referring to fig. 7, after connecting the steel beam 6 and the original structural beam 3 into a whole and supporting the same by the temporary support pillar 7, the column 4 to be pulled out is cut by using a wire saw, when the column 4 to be pulled out is cut, the sectional cutting is adopted, the cutting height of each section is controlled within 500mm, and the cut column section is transported to the lower part by using a hydraulic trailer.
S5, mounting the cross steel beam: referring to fig. 7, after the column 4 to be pulled out is cut off, a cross steel beam 9 is installed on the bottom surface of the intersection of the original structural beam 3, the cross steel beam 9 is lifted by using a lifting frame, four end surfaces of the cross steel beam 9 are respectively welded with one ends, far away from the original structural column 2, of the four steel beams 6, and therefore the cross steel beam 9 is connected with the four installed steel beams 6. And four steel beams 6 which are installed are welded with the anchor ear 5.
S6, injecting steel pouring glue: the steel pouring glue is injected between the steel plate 8 and the original structural beam 3 by adopting pressure glue injection water, and the gap between the steel plate 8 and the original structural beam 3 is filled with the steel pouring glue, so that the original structural beam 3 and the steel plate 8 are tightly and effectively combined into a whole, and the bearing capacity of the combined beam formed by the original structural beam 3 and the steel beam 6 is enhanced.
S7, measuring the stress and deflection of the combined beam: the jack 75 is removed, then the stress and deflection of the combined beam are measured, the stress and deflection of the combined beam are ensured to meet the design requirements, and the bearing structure can be stabilized.
S8, removing the temporary support column: referring to fig. 7 and 8, the stress and deflection of the composite girder are measured to ensure that the composite girder formed by connecting the original structural girder 3 and the steel girder 6 has sufficient bearing capacity to remove the temporary shoring columns 7.
This application is at 3 bottom surface installation girder steels 6 in original structure roof beam through staple bolt 5, then installation temporary support post 7 supports girder steel 6 and original structure roof beam 3 temporarily, then outsourcing steel sheet 8 on original structure roof beam 3, and use the chemistry crab-bolt to connect, then pour into steel pouring glue between steel sheet 8 and original structure post 2 and make steel sheet 8 and original structure roof beam 3 be connected closely, thereby make girder steel 6 and 3 zonulae occludens of original structure roof beam form composite beam, then the excision is waited to pull out post 4, wait to pull out the 4 excision of post and accomplish the back, demolish temporary support post 7, this application process is simple, work load has been reduced, and make girder steel 6 combine into wholly with original structure roof beam 3, the girder section of original structure roof beam 3 has been increased, can the original structure of stable support, make original structure not take place to destroy.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A joist column pulling construction method is characterized in that: the method comprises the following steps:
s1, installing the hoop and the steel beam: installing anchor ears (5) at the tops of four original structural columns (2), connecting steel beams (6) at one ends of the anchor ears (5), extending one ends of the steel beams (6) far away from the anchor ears (5) to positions close to columns (4) to be pulled, and attaching the steel beams (6) to the original structural beams (3);
s2, mounting a temporary support column: temporary support columns (7) are arranged on the periphery of the column (4) to be pulled, so that the temporary support columns (7) bear the steel beam (6);
s3, steel plate wrapping: wrapping a steel plate (8) outside the outer surface of the original structural beam (3), attaching the steel plate (8) to the original structural beam (3), and connecting the steel plate (8) with the original structural beam (3) by using a chemical anchor bolt;
s4, cutting the column to be pulled: after the bearing is stable, the column (4) to be pulled out is cut off by using a cutting tool;
s5, mounting the cross steel beam: after a column (4) to be pulled out is cut off, a cross steel beam (9) is arranged on the bottom surface of the cross part of the original structural beam (3), four end surfaces of the cross steel beam (9) are respectively welded with the end surfaces of four steel beams (6), and the four installed steel beams (6) are welded with a hoop (5);
s6, injecting steel pouring glue: pouring steel pouring glue between the steel plate (8) and the original structural beam (3), so that the original structural beam (3) and the steel plate (8) form a whole;
s7, removing the temporary support column: after the cross steel beam (9) is installed, the temporary support column (7) is dismantled;
and S8, measuring the stress and deflection of the combined beam.
2. The joist column pulling construction method according to claim 1 is characterized in that: in step S1, staple bolt (5) includes installation section (51) and horizontal segment (52), and installation section (51) includes circular roof (511) and circular bottom plate (512), and welding has connecting plate (514) between circular bottom plate (512) and circular roof (511), has drum (513) with circular bottom plate (512) lower surface welding, and horizontal segment (52) and installation section (51) integrated into one piece, and horizontal segment (52) set up in original structure roof beam (3) bottom surface.
3. The joist column pulling construction method according to claim 2 is characterized in that: the cylinder (513) is connected with the original structural column (2) by using a chemical anchor bolt.
4. The joist column pulling construction method according to claim 1 is characterized in that: in the step S1, the steel beam (6) is connected with the horizontal section (52), the steel beam (6) comprises an upper flange plate (61) and a lower flange plate (62), a web (63) is welded between the upper flange plate (61) and the lower flange plate (62), the web (63) is arranged in the same direction with the upper flange plate (61) and the lower flange plate (62), and the web (63) is perpendicular to the upper flange plate (61) and the lower flange plate (62).
5. The joist column pulling construction method according to claim 1 is characterized in that: in step S2, the temporary support pillar (7) includes a base (71), a column (73) fixed on the base (71), and a jack (75) disposed on a top surface of the column (73).
6. The joist column pulling construction method according to claim 1 is characterized in that: in step S2, protective plates (77) are fixed to the respective peripheries of the jacks (75).
7. The joist column pulling construction method according to claim 1 is characterized in that: in the step S3, steel plates (8) are respectively installed on the top surface and the two sides of the original structural beam (3), the steel plates (8) are connected with the original structural beam (3) through chemical anchor bolts, and the steel plates (8) on the two sides of the original structural beam (3) are welded with the top surface of the steel beam (6).
8. The joist column pulling construction method according to claim 1 is characterized in that: in step S6, a pressure glue injection is used to inject the steel-pouring glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110672742.9A CN113389406B (en) | 2021-06-17 | 2021-06-17 | Joist column pulling construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110672742.9A CN113389406B (en) | 2021-06-17 | 2021-06-17 | Joist column pulling construction method |
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| CN113389406A true CN113389406A (en) | 2021-09-14 |
| CN113389406B CN113389406B (en) | 2022-08-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095186A (en) * | 2022-07-13 | 2022-09-23 | 北京建工四建工程建设有限公司 | Steel structure supporting system for joist column pulling and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115095186A (en) * | 2022-07-13 | 2022-09-23 | 北京建工四建工程建设有限公司 | Steel structure supporting system for joist column pulling and construction method |
| CN115095186B (en) * | 2022-07-13 | 2023-07-07 | 北京建工四建工程建设有限公司 | Steel structure supporting system for joist column pulling and construction method |
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