CN113006529A - Back-jacking supporting structure and construction method thereof - Google Patents
Back-jacking supporting structure and construction method thereof Download PDFInfo
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- CN113006529A CN113006529A CN202110284345.4A CN202110284345A CN113006529A CN 113006529 A CN113006529 A CN 113006529A CN 202110284345 A CN202110284345 A CN 202110284345A CN 113006529 A CN113006529 A CN 113006529A
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- 238000010276 construction Methods 0.000 title claims abstract description 51
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 96
- 239000010959 steel Substances 0.000 claims abstract description 96
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 5
- 238000005728 strengthening Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 description 12
- 238000003466 welding Methods 0.000 description 6
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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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
- E04G25/00—Shores or struts; Chocks
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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
- E04G25/00—Shores or struts; Chocks
- E04G2025/003—Supports therefor, e.g. tripods
-
- 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
- E04G25/00—Shores or struts; Chocks
- E04G2025/006—Heads therefor, e.g. pivotable
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a back-jacking support structure and a back-jacking support structure construction method. The back-jacking support structure comprises a jacking column, a jacking node and a back-jacking base station. The supporting height of the jacking node is set to enable the jacking column to abut against the top of the steel structure, the jacking column can be guaranteed to jack the top of the steel structure in the construction process, and construction safety is improved. The top returning base station increases the contact area between the bottom of the top returning column and the bottom of the steel structure, has a dispersing effect on the pressure of the bottom of the steel structure by the top returning column, and can prevent the pressure of the top returning column from directly acting on the bottom of the steel structure and damaging the bottom of the steel structure. The construction method of the back-jacking support structure can ensure that the back-jacking column tightly jacks a steel structure in the construction process, reduces the construction difficulty and improves the construction convenience.
Description
Technical Field
The invention relates to the field of building construction, in particular to a back-jacking supporting structure and a back-jacking supporting structure construction method.
Background
The steel structure development is quick, and the construction of large-span steel structure adopts the construction of lifting support method, and the counter-force of hoisting frame or bed-jig bottom increases along with the weight increase of hoisting structure. The bearing capacity of the bottom structure of the large-span steel structure is weak, and the lifting frame needs to be supported by back jacking in order to ensure the stability and safety of the bottom structure. At present, the method for back-jacking and supporting mainly comprises the steps of increasing the reinforcing bars of a bottom concrete beam or a floor slab, additionally arranging a steel upright at the bottom of the concrete beam and the like. But the cost for additionally arranging the steel bars is high, the construction difficulty such as binding, vibrating and the like can be caused by the excessive density of the steel bars, and the applicability is small; the steel stand column is added, labor is consumed greatly, the embedding section needs to be reserved, the steel stand column can be loosened, jacking cannot be easily achieved, and safety is low.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the back-jacking supporting structure provided by the invention can ensure that the back-jacking column tightly jacks the top of a steel structure in the construction process, and improves the construction safety.
The invention further provides a construction method of the back-jacking support structure.
The back supporting structure according to the embodiment of the first aspect of the present invention, which is used for supporting a steel structure, comprises:
the ejection column is used for ejecting the top of the steel structure;
the jacking node is connected with the back-jacking column, is positioned below the back-jacking column and is used for supporting the back-jacking column and enabling the back-jacking column to jack against the top of the steel structure;
the back-jacking base station is connected with the back-jacking column, the back-jacking base station is located below the back-jacking column, and the back-jacking base station is used for being connected with the bottom of the steel structure.
The back-jacking support structure provided by the embodiment of the invention at least has the following beneficial effects: the tight node in top provides the holding power for going back the post, makes the top of going back the post and holding the steel construction through the bearing height who sets for the tight node in top, can guarantee to go back the top of post in the tight steel construction in work progress top, has improved the security of construction. In addition, the tight node in top has disperseed the pressure of back post to the bottom of steel construction, can prevent that back post from causing the destruction to the bottom of steel construction. The top returning base station increases the contact area between the bottom of the top returning column and the bottom of the steel structure, has a dispersing effect on the pressure of the bottom of the steel structure by the top returning column, and can prevent the pressure of the top returning column from directly acting on the bottom of the steel structure and damaging the bottom of the steel structure.
According to some embodiments of the invention, the jacking node comprises a connecting member and a plurality of jacking supports, the connecting member is supported below the ejection-returning column, the connecting member extends in a direction away from the ejection-returning column, the jacking supports are connected with the connecting member, and the jacking supports are supported below the connecting member.
According to some embodiments of the invention, the connecting member includes a plurality of connecting portions and a plurality of supporting portions, the connecting portions are connected with the back prop, the connecting portions extend along an axial direction of the back prop, the supporting portions are connected with the connecting portions, an extending direction of the supporting portions is perpendicular to an extending direction of the connecting portions, the tightening support is located below the supporting portions, and the tightening support is used for supporting the supporting portions.
According to some embodiments of the invention, the ejection-returning post is provided with a plurality of bottom slots, the bottom slots are located at one end of the ejection-returning post connected with the connecting part, and the connecting part is arranged to be inserted into the bottom slots.
According to some embodiments of the present invention, the tightening support includes a tightening base and a telescopic portion, the tightening base is supported below the telescopic portion, the telescopic portion is supported below the connecting member, and the telescopic portion is capable of extending and retracting in an up-down direction relative to the tightening base.
According to some embodiments of the present invention, the back supporting structure further includes a top abutting member, the top abutting member is connected to the back column and used for abutting against one end of the top of the steel structure, the area of the cross section of the top abutting member is larger than that of the cross section of the back column, and the top abutting member is used for abutting against the top of the steel structure.
According to some embodiments of the invention, the back support structure further comprises a plurality of reinforcing ribs connected between the top retainer and the back post.
According to some embodiments of the invention, the ejection-returning pillar is provided with a plurality of top slots, the top slots are located at one end of the ejection-returning pillar connected with the top holding piece, and the reinforcing rib can be inserted into the top slots.
According to some embodiments of the invention, the connector further comprises a bottom support connected to the roof-return abutment, the bottom support having a cross-sectional area greater than the cross-sectional area of the roof-return post.
According to some embodiments of the invention, the topping base comprises a pouring layer and a recharging layer, the recharging layer is connected with the topping post, and the pouring layer is located below the recharging layer.
The construction method of the back-jacking supporting structure according to the embodiment of the second aspect of the invention comprises the following steps:
preparing a back shore and a jacking node as described in the first embodiment of the invention;
building the back-to-top base platform at a set position at the bottom of the steel structure;
enabling the back jacking column to jack the top of the steel structure tightly above the back jacking base station;
and filling a gap between the back jacking column and the back jacking base station.
The construction method of the back-jacking support structure provided by the embodiment of the invention at least has the following beneficial effects: the top of the steel structure is tightly jacked by the back jacking column, a set height is reserved between the back jacking base platform and the back jacking column, the back jacking column is connected with the back jacking base platform at the bottom through filling, and the back jacking column can be guaranteed to tightly jack the steel structure in the construction process. In addition, because the top returning base station is connected with the top returning column through the filling gap, the height of the top returning base station does not need to be accurately set, the construction difficulty is reduced, and the construction convenience is improved.
According to some embodiments of the invention, filling the gap between the roof-return abutment and the bottom of the roof-return pillar comprises: and pouring grouting material into the gap between the back-jacking column and the back-jacking base platform.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic view of a back support structure according to an embodiment of the present invention;
FIG. 2 is an exploded view of a back support structure according to an embodiment of the present invention;
fig. 3 is a bottom partial schematic view of a back support structure according to an embodiment of the invention.
Reference numerals:
the steel structure comprises a back-propping column 100, a bottom slot 110, a top abutting part 120, a reinforcing rib 130, a top slot 140, a top tight joint 200, a connecting part 210, a connecting part 211, a supporting part 212, a top tight supporting part 220, a top tight base 221, a telescopic part 222, a bottom supporting part 230, a back-propping base station 300, a pouring layer 310, a recharging layer 320, a steel structure top 410 and a steel structure bottom 420.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of "one embodiment," "some embodiments," or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, an embodiment of the present invention provides a back-up supporting structure, which includes a back-up pillar 100, a tightening node 200, and a back-up base 300. The jacking node 200 is connected with the back-jacking column 100, the jacking node 200 is positioned below the back-jacking column 100, and the jacking node 200 is used for supporting the back-jacking column 100 and enabling the back-jacking column 100 to jack the top 410 of the steel structure; the back abutment 300 is located below the back pillar 100, the back abutment 300 includes a pouring layer 310 and a recharging layer 320, the recharging layer 320 is connected with the back pillar 100, and the pouring layer 310 is used for being connected with the bottom 420 of the steel structure.
The back-jacking column 100 is a column structure used for the top 410 of a back-jacking steel structure, the back-jacking column 100 can be made of various steel alloys, and the back-jacking column 100 made of the steel alloys is light in weight and has good strength. The tightening joint 200 may be connected to the back-up column 100 by welding or screwing. The jacking node 200 may be a connection structure consisting of a plurality of steel columns, jig frames, jacks or other support structures for supporting the jacking pillars 100. Specifically, a plurality of steel columns, bed-jig, jack or other bearing structure connect in back the top post 100 all around, and a plurality of steel columns, bed-jig, jack or other bearing structure are connected with the bottom 420 of steel construction, for back the top post 100 provides the holding power, make back the top post 100 support the top 410 of holding the steel construction through the supporting height who sets for the tight node 200 in top, can guarantee to back the top post 100 and push up the top 410 of steel construction in the work progress, have improved the security of construction. In addition, the jacking node 200 disperses the pressure of the back-jacking column 100 on the bottom 420 of the steel structure, and can prevent the back-jacking column 100 from damaging the bottom 420 of the steel structure.
The back jacking base station 300 is connected with the bottom 420 of the steel structure and arranged at the lower end connected with the back jacking column 100 to provide jacking support for the back jacking column 100. The top returning base station 300 increases the contact area between the bottom of the top returning column 100 and the bottom of the steel structure, has a dispersing effect on the pressure of the top returning column 100 to the bottom of the steel structure, and can prevent the pressure of the top returning column 100 from directly acting on the bottom 420 of the steel structure to damage the bottom 420 of the steel structure. The back abutment 300 may be formed by pouring concrete, grouting material, etc., wherein the grouting material is a non-shrinkage grouting material in the related art, and the composition and application thereof are well known in the art.
Compared with the reinforcing bars of a concrete beam or a floor slab additionally arranged at the bottom 420 of a steel structure, the back-jacking column 100, the jacking joint 200 and the back-jacking base station 300 are simple in structure, small in construction amount and convenient to construct, a large amount of reinforcing steel bars are saved, the back-jacking column 100 and the jacking joint 200 can be recycled, and the back-jacking support structure has good economy.
In addition, the construction method of the back-jacking support structure in the embodiment of the invention comprises the following steps: building a back-to-top base station 300 at a set position at the bottom 420 of the steel structure; a preset height is reserved between the back-jacking base station 300 and the back-jacking column 100, so that a gap with the preset height is reserved between the back-jacking column 100 and the top 410 of the steel structure after the back-jacking column 100 is placed on the back-jacking base station 300; after the jacking column 100 is supported by the jacking node 200 to jack the top 410 of the steel structure, a gap with a reserved height exists between the jacking base station 300 and the jacking column 100; and finally, filling the gap between the back-jacking column 100 and the back-jacking base station 300 in a concrete pouring or grouting manner. After the top 410 of the jacking steel structure can be supported and tightly jacked by the jacking node 200 in the construction process of the jacking column 100, the jacking column 100 is connected with the bottom jacking base station 300 through filled concrete or grouting material, and the jacking steel structure of the jacking column 100 can be guaranteed to be tightly jacked in the construction process. Because the top-returning base station 300 and the top-returning column 100 are connected by filling the reserved gap through pouring concrete or grouting material, the height of the top-returning base station 300 does not need to be accurately set, and compared with the mode that a steel column is directly additionally arranged in the prior art, the accuracy of the reserved embedding section is reduced, so that the construction difficulty is reduced, and the construction convenience is improved.
Referring to fig. 1 and 2, in some embodiments of the present invention, the tightening node 200 includes a connecting member 210 and a plurality of tightening supports 220, the connecting member 210 is located below the back prop 100, the connecting member 210 is used for supporting the back prop 100, the connecting member 210 extends in a direction away from the back prop 100, the tightening supports 220 are connected to the connecting member 210, the tightening supports 220 are located below the connecting member 210, and the tightening supports 220 are used for supporting the connecting member 210. The connecting member 210 may be a plate-shaped structure or other structure made of steel alloy or other materials with high strength, and the connecting member 210 extends toward the periphery of the back prop 100 in a direction away from the back prop 100 so that the tightening support 220 can support the connecting member 210. By setting the height of the jacking support 220, the jacking column 100 jacks the top 410 of the steel structure, and the structure is simple and easy to implement.
Referring to fig. 1 and 2, in some embodiments of the present invention, the connection member 210 includes a plurality of connection portions 211 and a plurality of support portions 212, the connection portions 211 are connected to the back prop 100, the connection portions 211 extend along an axial direction of the back prop 100, the support portions 212 are connected to the connection portions 211, an extending direction of the support portions 212 is perpendicular to an extending direction of the connection portions 211, the tightening support 220 is located below the support portions 212, and the tightening support 220 is used for supporting the support portions 212. The supporting portion 212 is perpendicular to the connecting portion 211, so that the stress distribution of the connecting member 210 is more reasonable, and the connecting member 210 is prevented from being completely broken or broken due to stress concentration. The number of the supporting portions 212 is the same as that of the tightening supports 220, and the larger the number of the supporting portions 212 and the number of the tightening supports 220 are, the more the pressure distribution of the roof prop 100 on the connecting member 210 is dispersed. Referring to fig. 2 and 3, the connecting portions 211 and the supporting portions 212 are symmetrically disposed about the central axis of the back prop 100, so that the stress distribution of the connecting member 210 can be more reasonable.
Referring to fig. 2 and 3, in some embodiments of the present invention, the ejection pin 100 is provided with a plurality of bottom slots 110, the bottom slots 110 are located at one end of the ejection pin 100 connected to the connecting portion 211, and the connecting portion 211 is disposed in the bottom slots 110. The connecting portion 211 is inserted into the bottom slot 110 at the corresponding position, and then connected to the back prop 100 by welding or the like, and the bottom slot 110 is provided to facilitate the connection and positioning between the connecting member 210 and the back prop 100. In addition, the connecting part 211 is connected to the inside of the back prop 100, and the connecting part 210 is more stable in bearing.
In order to prevent the check top post 100 and the connecting piece 210 from loosening, the connecting part 211 can be connected with the check top post 100 through welding, and after the welding seam of the connecting part 211 and the connecting part 211 is split at high temperature, the check top post 100 can be recycled, so that the economical efficiency is high.
Referring to fig. 3, in some embodiments of the present invention, the tightening support 220 includes a tightening base 221 and an expansion portion 222, the tightening base 221 is supported below the expansion portion 222, the expansion portion 222 is supported below the connection member 210, and the expansion portion 222 can expand and contract in the up-down direction relative to the tightening base 221 to adjust the support height of the tightening support 220. The telescopic portion 222 may be a full cylinder, a rope, a single cylinder bolt, or the like. Because flexible portion 222 can be flexible along upper and lower direction, the strong point that supports 220 in top can set up earlier at a lower height, returns the post 100 and is connected the back with connecting piece 210, and rethread tight support 220 risees and makes the top 410 of the tight steel construction in top 100 top of returning, can promote the convenience of construction. The tightening support 220 may be selected as a support structure having a telescopic mechanism, such as various jacks, hydraulic support rods, and the like.
Referring to fig. 1 and 2, in some embodiments of the present invention, the back supporting structure further includes a top supporting member 120, the top supporting member 120 is connected to one end of the back pillar 100 for tightly supporting the top of the steel structure, the cross-sectional area of the top supporting member 120 is larger than that of the back pillar 100, and the top supporting member 120 is used for supporting the top 410 of the steel structure. The top abutting piece 120 can increase the contact area between the ejection-returning column 100 and the top of the steel structure, reduce the local pressure of the ejection-returning column 100 on the top 410 of the steel structure, and prevent the top 410 of the steel structure from being damaged by the ejection-returning column 100. The top retainer 120 may be a plate-like structure made of various types of steel materials or other materials having high strength.
Referring to fig. 1 and 2, in some embodiments of the present invention, the back support structure further includes a plurality of reinforcing ribs 130, and the reinforcing ribs 130 are connected between the top holding member 120 and the back post 100. The reinforcing rib 130 can increase the connection strength between the top holding member 120 and the ejection-returning post 100, and prevent the breakage of the top holding member 120 caused by an excessive ejection pressure in the ejection-returning post 100.
In some embodiments of the present invention, the top-pulling pillar 100 is provided with a plurality of top slots 140, the top slots 140 are located at one end of the top-pulling pillar 100 connected to the top supporting member 120, and the reinforcing ribs 130 are disposed in the top slots 140. The reinforcing rib 130 is inserted into the top slot 140 at the corresponding position, and then is connected with the back prop 100 by welding or the like, and the top slot 140 is arranged to facilitate the connection and positioning between the connecting member 210 and the back prop 100. In addition, the reinforcing ribs 130 are connected to the inner part of the back prop 100, and the connecting member 210 is more stable in load bearing. Referring to fig. 2, a plurality of stiffeners 130 may be connected as one connection node to facilitate the simultaneous insertion of the plurality of stiffeners 130 into the top slots 140. The reinforcing ribs 130 may be connected to the back post 100 by welding to secure stability of the connection.
Referring to fig. 1 and 2, in some embodiments of the present invention, the connecting member 210 further includes a bottom supporter 230, the bottom supporter 230 is connected to the back abutment 300, and a cross-sectional area of the bottom supporter 230 is greater than that of the back post 100. The bottom support 230 can increase the contact area between the jacking node 200 and the jacking abutment 300 to reduce the local pressure of the jacking leg 100 on the bottom 420 of the steel structure, thereby preventing the bottom 420 of the steel structure from being damaged by the jacking leg 100.
Referring to fig. 1 and 3, in some embodiments of the present invention, the back abutment 300 includes a casting layer 310 and a back filling layer 320, the back filling layer 320 is connected to the back pillar 100, the casting layer 310 is located below the back filling layer 320, the casting layer 310 is composed of concrete or grouting material, and the back filling layer 320 is composed of grouting material. Because the structure that the grout makes up has the non-shrink characteristic, the layer 320 of recharging can not take place to shrink, and after the top of the steel construction 410 is tightly pushed up to the back shore 100, back shore 100 can not appear the clearance because of the shrink of back shore base station 300 between the top of steel construction 410 in subsequent construction process, has promoted back shore bearing structure's stability.
The embodiment of the invention also provides a method for connecting the back-jacking supporting structure, which comprises the following steps:
the back prop 100 and the tightening node 200 in the above embodiment are prepared,
building a back-to-top base station 300 at a set position at the bottom 420 of the steel structure;
the top 410 of the steel structure is tightly propped against the back-jacking column 100 above the back-jacking base station 300;
filling the gap between the back pillar 100 and the back abutment 300.
The bottom 420 of the steel structure is constructed to be the top-returning abutment 300 by pouring concrete or grouting material. The back prop 100 is a columnar structure for supporting the top 410 of the steel structure back. The back post 100 may be made of various types of steel alloys. The back shore 100 and the jacking nodes 200 may be pre-fabricated at the factory.
Referring to fig. 1 to 3, a back-jacking base station 300 with a proper size is built at a place where a steel structure needs back-jacking support, and the back-jacking base station 300 can be rectangular, so that the fixed die construction is facilitated. The area of the cross section of the back abutment 300 is set to be larger than the area of the cross section of the back column 100, so that the contact area between the back column 100 and the bottom of the steel structure is increased, and the bottom 420 of the steel structure is prevented from being damaged due to overlarge local pressure. The height of the back abutment 300 is set to be smaller than the height difference between the distance from the top 410 to the bottom of the steel structure and the length of the back column 100, so as to reserve the margin for the installation of the back column 100. In addition, the back abutment 300 is constructed to facilitate the positioning of the back pillar 100.
After the back-jacking base station 300 is built, the back-jacking column 100 is enabled to jack the top 410 of the steel structure tightly above the back-jacking base station 300, specifically, the bottom end of the back-jacking column 100 can be connected with a jacking node 200, the jacking node 200 supports the back-jacking column 100, and the top 410 of the steel structure tightly jacked by the top of the back-jacking column 100 can be enabled to be jacked by setting the supporting height of the jacking node 200. Jacking node 200 the jacking node 200 may be a connecting structure consisting of a plurality of steel columns, jig frames, jacks, or other support structures for supporting the return stanchion 100. Wherein, the tight node 200 in top can set up to the bearing structure that can stretch out and draw back along upper and lower direction, for example utilize structures such as jack, hydraulic support pole, and the strong point that supports 220 in top can set up earlier at a lower height, returns the post 100 and is connected the back with connecting piece 210, and rethread tight support 220 risees the top 410 that makes the tight steel construction in top of the post 100 that returns, promotes the convenience of construction. The jacking node 200 does not need to be dismantled, and the jacking node 200 can disperse the pressure of the back prop 100 on the back abutment 300.
A margin is reserved between the topping base 300 and the topping column 100, so that after the topping column 100 tightly pushes the top 410 of the steel structure, a gap exists between the topping base 300 and the topping column 100, and the gap is filled, so that the topping column 100 and the topping base 300 are connected together.
The method for filling the gap between the back-jacking base stations 300 is to pour concrete or grouting material into the gap between the back-jacking column 100 and the back-jacking base stations 300, wherein the structure poured and formed by the grouting material has no flexibility, so that the surface of the back-jacking base station 300 in contact with the back-jacking column 100 can be prevented from shrinking, the later construction of the back-jacking column 100 is prevented from loosening, and the stability of the top of the steel structure tightly jacked by the back-jacking column 100 is improved.
According to the construction method of the back-jacking supporting structure in the embodiment of the invention, the back-jacking column 100 firstly jacks the top 410 of the steel structure, the height between the back-jacking base station 300 and the back-jacking column 100 is reserved, and the back-jacking column 100 is connected with the back-jacking base station 300 at the bottom through filling, so that the back-jacking column 100 can be guaranteed to jack the steel structure in the construction process. In addition, because the top-returning base station 300 and the top-returning column 100 are connected by filling gaps, the height of the top-returning base station 300 does not need to be accurately set, the construction difficulty is reduced, and the construction convenience is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. Back a bearing structure, its characterized in that for support steel construction, back a bearing structure includes:
the ejection column is used for ejecting the top of the steel structure;
the jacking node is connected with the back-jacking column, is positioned below the back-jacking column and is used for supporting the back-jacking column and enabling the back-jacking column to jack against the top of the steel structure;
the back-jacking base station is connected with the back-jacking column, the back-jacking base station is located below the back-jacking column, and the back-jacking base station is used for being connected with the bottom of the steel structure.
2. The back-jacking support structure according to claim 1, wherein the jacking nodes comprise a connecting member and a plurality of jacking supports, the connecting member is supported below the back-jacking columns, the connecting member extends in a direction away from the back-jacking columns, the jacking supports are connected with the connecting member, and the jacking supports are supported below the connecting member.
3. The ejection-returning support structure according to claim 2, wherein the connecting member includes a plurality of connecting portions and a plurality of supporting portions, the connecting portions are connected to the ejection-returning posts, the connecting portions extend in an axial direction of the ejection-returning posts, the supporting portions are connected to the connecting portions, an extending direction of the supporting portions is perpendicular to an extending direction of the connecting portions, the ejection-supporting members are located below the supporting portions, and the ejection-supporting members are used for supporting the supporting portions.
4. The back-up support structure according to claim 3, wherein the back-up post is provided with a plurality of bottom slots at one end of the back-up post where the connecting portion is connected, the connecting portion being disposed in the bottom slots.
5. The back-up support structure according to claim 2, wherein the back-up support member comprises a back-up base and an expansion portion, the back-up base is supported below the expansion portion, the expansion portion is supported below the connecting member, and the expansion portion can expand and contract in the vertical direction relative to the back-up base.
6. The back-jacking support structure according to claim 1, further comprising a top abutting member, wherein the top abutting member is connected to one end of the back-jacking column for abutting against the top of the steel structure, the area of the cross section of the top abutting member is larger than that of the cross section of the back-jacking column, and the top abutting member is used for abutting against the top of the steel structure.
7. The back-topping support structure of claim 6 further comprising a plurality of strengthening ribs connected between the top abutment and the back-topping post.
8. The back-topped support structure of claim 1, wherein the back-topped abutment comprises a casting layer and a back-filled layer, the back-filled layer being connected to the back-topped column, the casting layer being located below the back-filled layer.
9. The construction method of the back-jacking supporting structure is characterized by comprising the following steps:
preparing a back shore and a jacking node as claimed in any one of claims 1 to 8;
building the back-to-top base station at a set position at the bottom of the steel structure;
enabling the back jacking column to jack the top of the steel structure tightly above the back jacking base station;
and filling a gap between the back jacking column and the back jacking base station.
10. The method of claim 9, wherein the method of filling the gap between the topping base platform and the topping post bottom comprises: and pouring grouting material into the gap between the back-jacking column and the back-jacking base platform.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110284345.4A CN113006529A (en) | 2021-03-17 | 2021-03-17 | Back-jacking supporting structure and construction method thereof |
| PCT/CN2021/119890 WO2022193598A1 (en) | 2021-03-17 | 2021-09-23 | Back-jacking supporting structure and construction method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110284345.4A CN113006529A (en) | 2021-03-17 | 2021-03-17 | Back-jacking supporting structure and construction method thereof |
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| CN113006529A true CN113006529A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110284345.4A Pending CN113006529A (en) | 2021-03-17 | 2021-03-17 | Back-jacking supporting structure and construction method thereof |
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| Country | Link |
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| CN (1) | CN113006529A (en) |
| WO (1) | WO2022193598A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193598A1 (en) * | 2021-03-17 | 2022-09-22 | 中建科工集团有限公司 | Back-jacking supporting structure and construction method therefor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003261909A (en) * | 2002-03-07 | 2003-09-19 | Ishikawajima Harima Heavy Ind Co Ltd | Method for reinforcing steel pier and reinforcing structure |
| BRPI0505151A (en) * | 2005-11-22 | 2007-08-07 | Fabio Luiz Dos Santos Santana | adjustable support column - csa |
| CN107191000A (en) * | 2017-06-07 | 2017-09-22 | 中铁第勘察设计院集团有限公司 | The temporary support of telescopic in height regulation reinforces combination steel construction |
| CN208586937U (en) * | 2018-07-10 | 2019-03-08 | 中建八局第一建设有限公司 | One kind can apply pre-jacking force concrete structure and return back to top device |
| CN111042579A (en) * | 2020-01-02 | 2020-04-21 | 中国建筑第八工程局有限公司 | Quick back jacking device and method for load-bearing structure |
| CN113006529A (en) * | 2021-03-17 | 2021-06-22 | 中建科工集团有限公司 | Back-jacking supporting structure and construction method thereof |
-
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- 2021-03-17 CN CN202110284345.4A patent/CN113006529A/en active Pending
- 2021-09-23 WO PCT/CN2021/119890 patent/WO2022193598A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022193598A1 (en) * | 2021-03-17 | 2022-09-22 | 中建科工集团有限公司 | Back-jacking supporting structure and construction method therefor |
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| WO2022193598A1 (en) | 2022-09-22 |
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