CN116289640A - Prefabricated upright column roll-over stand and construction method thereof - Google Patents
Prefabricated upright column roll-over stand and construction method thereof Download PDFInfo
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- CN116289640A CN116289640A CN202310255340.8A CN202310255340A CN116289640A CN 116289640 A CN116289640 A CN 116289640A CN 202310255340 A CN202310255340 A CN 202310255340A CN 116289640 A CN116289640 A CN 116289640A
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- 238000010276 construction Methods 0.000 title claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 211
- 239000010959 steel Substances 0.000 claims abstract description 211
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 67
- 230000008093 supporting effect Effects 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 41
- 239000004744 fabric Substances 0.000 claims description 31
- 230000000368 destabilizing effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 12
- 238000009434 installation Methods 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
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- 239000011087 paperboard Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E01D21/105—Balanced cantilevered erection
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Abstract
The invention discloses a prefabricated upright column roll-over stand and a construction method thereof, wherein the prefabricated upright column roll-over stand comprises a supporting part and a reinforcing part, a movable cavity is formed in the supporting part, the reinforcing part is positioned in the movable cavity and connected in the supporting part, the lower ends of the supporting parts are respectively provided with a first opening, and the first openings are communicated with the movable cavity; the construction method comprises the following steps: s1, a reserved steel bar of a prefabricated upright post stretches into a movable cavity through an opening; s2, vertically overturning the prefabricated upright post through the crane so that a main stress point of the prefabricated upright post is supported by the prefabricated upright post overturning frame. By adopting the construction method, the function of the equivalent hinge point of the prefabricated upright post is fully exerted, the rapid overturning of the prefabricated upright post is ensured, and the construction efficiency is improved; meanwhile, the defects that stress points are unknown, overturning is easy to occur, concrete is damaged, ribs are exposed and the like in the overturning process of the prefabricated upright posts in the prior art are overcome, the durability of the integral structure is improved, the safety and the reliability are realized, and the life safety of construction operators is guaranteed.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a prefabricated upright column roll-over stand and a construction method thereof.
Background
In bridge engineering field, the mainstream structure that adopts at present is prefabricated bridge structure of assembling, need apply prefabricated stand when the construction, need at first with prefabricated stand level place on buffering yardage roll when overturning, buffering yardage roll sets up on the better subaerial of ground or road bed boxboard, then at the top hoisting point installation loop wheel machine of prefabricated stand, hoist up prefabricated stand through the loop wheel machine and carry out the upset operation, the weight of prefabricated stand is acted on the undermost edge turning point of prefabricated stand this moment, traditional prefabricated stand turning point position does not set up the buried bar that exposes.
Based on the prefabricated stand structure of circular seam formula connection that patent CN108999077A discloses, be provided with exposed embedded bar, and in order to guarantee to hoist and mount the atress stability of location to prefabricated stand, set up the indentation section at the tip of prefabricated stand. However, even if the traditional method for overturning the prefabricated upright post is adopted, the defects that the stress points of the prefabricated upright post are not clear and the prefabricated upright post is easy to overturn are still caused, and meanwhile, the problems that the reserved reinforcing steel bars at the end parts of the prefabricated upright post and the concrete of the retracting sections are easy to damage, the exposed reinforcing steel bars and the like are caused.
Disclosure of Invention
The invention aims to overcome the defects that a prefabricated upright post in the prior art is unclear in stress points, easy to overturn, concrete and exposed ribs are damaged and the like when the prefabricated upright post is overturned, and provides a prefabricated upright post overturning frame and a construction method thereof.
The invention solves the technical problems by the following technical scheme:
the construction method of the prefabricated upright column roll-over stand comprises a supporting part and a reinforcing part, wherein a movable cavity is formed in the supporting part, the reinforcing part is positioned in the movable cavity and connected in the supporting part, the lower ends of the supporting parts are respectively provided with a first opening, and the first openings are communicated with the movable cavity;
the construction method comprises the following steps:
s1, a reserved steel bar of a prefabricated upright post stretches into the movable cavity through the opening;
s2, vertically overturning the prefabricated upright post through the crane, so that a main stress point of the prefabricated upright post is supported by the prefabricated upright post overturning frame.
In the scheme, the construction method that the reserved steel bars of the prefabricated stand columns extend into the movable cavity through the openings, and then the prefabricated stand columns are vertically turned through the crane is adopted, so that the effect of equivalent hinge points of the prefabricated stand columns is fully exerted, the rapid turning of the prefabricated stand columns is ensured, and the construction efficiency is improved; meanwhile, the defects that stress points are unknown, overturning is easy to occur, concrete is damaged, ribs are exposed and the like in the overturning process of the prefabricated upright posts in the prior art are overcome, the durability of the integral structure is improved, the safety and the reliability are realized, and the life safety of construction operators is guaranteed.
Preferably, the supporting component comprises an inner steel plate, an outer steel plate, a bottom steel plate and a top steel plate which are sequentially connected, the inner steel plate, the outer steel plate, the bottom steel plate and the top steel plate are enclosed to form the movable cavity, the reinforcing component is a cross steel plate, and the first opening is arranged below the inner steel plate;
the step S2 specifically includes:
in the overturning process, the main stress point is gradually changed from the junction of the bottom steel plate and the outer steel plate to the junction of the top steel plate and the inner steel plate;
when the stress point of the prefabricated upright column overturning frame and the mass center of the prefabricated upright column are in the same straight line in the vertical direction, the overturning speed of the prefabricated upright column is reduced so as to reduce the shaking amplitude.
In the scheme, the step S2 specifically comprises the control of the stress point in the overturning process and the control of the speed in the overturning process so as to reduce the shaking amplitude, so that some details in the overturning process are further defined, and the overall efficiency in the overturning process is improved.
Preferably, the front end of the prefabricated upright post is provided with a buffer cloth roll, the bottom of the prefabricated upright post is provided with a core block, and the method further comprises the following steps after the step S1 and before the step S2:
s3, arranging buffer layers on the top steel plate and the inner steel plate, which are contacted with the core block, of the prefabricated upright column roll-over stand, wherein the buffer layers can be adhered with rubber;
s4, placing the buffer cloth roll at a position close to the outer steel plate, wherein the placing position is right below the inverted prefabricated upright post, so that the inverted prefabricated upright post can be pressed on the buffer cloth roll;
s5, installing a lifting appliance at a lifting point at the end part of the prefabricated upright post.
In this scheme, after turning over the frame joint in prefabricated stand with prefabricated stand, before turning over prefabricated stand, paste the buffer layer in top steel sheet and inboard steel sheet department earlier, place the buffering yardage roll to and the hoisting point department installation hoist at the tip of prefabricated stand provides sufficient preface condition for subsequent upset work, guaranteed going on smoothly high-efficiently of upset process.
Preferably, the construction method further comprises the following steps after the step S2:
s6, after the prefabricated upright post exceeds a destabilizing critical value in the overturning process, the stress point is gradually transferred onto the cushion cloth roll by the prefabricated upright post overturning frame, and the core block is gradually contacted with the cushion cloth roll.
S7, after the prefabricated upright post is overturned to the bottom surface of the core block to vertically contact with the cushion cloth roll, gradually lifting the prefabricated upright post by using the crane;
s8, disassembling the prefabricated upright column roll-over stand.
In this scheme, after overturning the prefabricated stand, adjust according to the degree of upset, in the in-process that gradually approaches unstability critical value, the atress point gradually shifts to on the cushion yardage roll from the prefabricated stand, and the core piece also gradually contacts the cushion yardage roll simultaneously until the bottom of core piece contacts the cushion yardage roll completely, further promotes prefabricated stand convenient to detach's prefabricated stand roll-over frame through the loop wheel machine this moment to convenient reuse.
The prefabricated upright column overturning frame is applied to overturning of the prefabricated upright column and comprises a supporting part and a reinforcing part, wherein the supporting part is covered on the reinforcing part, the reinforcing part is connected to the inner wall surface of the supporting part, and a first opening is formed in the lower end of the supporting part;
the bottom ring of prefabricated stand is equipped with the reservation reinforcing bar, reserve reinforcing bar joint in first opening is used for fastening prefabricated stand roll-over stand, supporting part is along with prefabricated stand circumference upset and provide holding power.
According to the scheme, the support part and the reinforcing part are arranged on the prefabricated upright roll-over frame and are matched with each other to form the main body structure of the prefabricated upright roll-over frame, the main body structure has strong supporting force based on the structural characteristics, the supporting effect on the prefabricated upright can be exerted in the process of turning over the prefabricated upright, the supporting effect serves as an equivalent hinge fulcrum, the rapid turning over of the prefabricated upright is guaranteed, and the construction efficiency is improved; simultaneously, reserve the reinforcing bar through ring setting in the bottom of prefabricating the stand, the cooperation is offered first opening at the lower extreme of supporting part, reserve the reinforcing bar and can pass first opening and realize mutual joint, thereby can be fixed in prefabricating on the stand with prefabricating the stand roll-over stand, reduce the risk that drops, under the mutually supporting of above-mentioned structure, finally realize that supporting part provides holding power when prefabricating stand circumference upset, and then the prefabricated stand among the prior art is not clear at the atress point when upset, easily take place to topple and damage defects such as concrete, rib, the durability of overall structure has been promoted, safe and reliable, construction operation personnel's life safety has been ensured.
Preferably, the support part comprises an inner steel plate, an outer steel plate, a bottom steel plate and a top steel plate which are sequentially connected, the inner steel plate, the bottom steel plate and the top steel plate are enclosed to form a movable cavity, the inner steel plate is attached to and propped against the bottom surface of the prefabricated upright post, the inner steel plate is provided with a first opening, the first opening is communicated with the movable cavity, and the reserved steel bar penetrates through the first opening and stretches into the movable cavity.
In the scheme, the supporting part mainly comprises an inner steel plate, an outer steel plate, a bottom steel plate and a top steel plate, which are sequentially connected to form a hollow column, a movable cavity is arranged in the middle of the hollow column and is communicated with a first opening on the inner steel plate, so that conditions are provided for the extension of reserved steel bars, and the prefabricated upright column roll-over stand can be smoothly clamped on the reserved steel bars; simultaneously, set up to laminate the inboard steel sheet and lean on in the bottom surface of prefabricated stand for prefabricated stand roll-over stand is stable to lean on in prefabricated stand, avoids prefabricated stand roll-over stand to take place the serious condition of rocking at prefabricated stand upset in-process.
Preferably, the reinforcing member is disposed in the movable chamber, and the reinforcing member is connected to the inner steel plate, the outer steel plate, the bottom steel plate, and the top steel plate.
In this scheme, set up the reinforcing part in the activity intracavity, reserve the space of an installation for the reinforcing part can install in the activity intracavity, and connect in inboard steel sheet, outside steel sheet, end steel sheet and top steel sheet, obtain supporting part to provide holding power, make the overall structure of the prefabricated stand roll-over stand that the two combine to form have stronger supporting role, provide the preface condition for further well cooperation prefabricated stand upset.
Preferably, the reinforcing member is a cross steel plate.
In this scheme, the reinforcing part sets up to the cross steel sheet, connects in inboard steel sheet, outside steel sheet, end steel sheet and top steel sheet, provides holding power to four parts, improves overall structure's intensity.
Preferably, the reinforcing component comprises a radial plate, a second opening is arranged below the radial plate, the first opening is arranged below the inner steel plate, the first opening and the second opening are consistent in size, and the reserved steel bars are correspondingly clamped in the first opening and the second opening.
In this scheme, through setting up the second opening at radial board, simultaneously through setting up first opening on the inboard steel sheet for reserve the reinforcing bar can get into through first opening and second opening, and correspond the joint in above-mentioned two openings, the activity intracavity is arranged in to the main part of finally reserving the reinforcing bar, makes prefabricated stand roll-over stand can stabilize, avoids prefabricated stand because the crooked deformation phenomenon of reserve reinforcing bar that the action of gravity produced in the upset process.
Preferably, the lengths of the first opening and the second opening are smaller than the lengths of the sections of the inner steel plate and the reinforcing member, and the heights of the first opening and the second opening are larger than twice the diameter of the reserved steel bar.
In this scheme, this kind of setting is adopted to first open-ended and second open-ended length and height, thereby all stretches into the activity intracavity smoothly for reserving the reinforcing bar and assists prefabricated stand roll-over stand to fasten in prefabricated stand, has provided sufficient space, provides the preface condition for improving overall structure's stability.
Preferably, a core block is arranged at the bottom of the prefabricated upright, the top steel plate of the supporting component abuts against the core block, and the inner steel plate of the supporting component abuts against the bottom of the prefabricated upright.
In this scheme, support the top steel sheet of supporting part in the core piece that sets up in the bottom of prefabricating the stand, the inboard steel sheet of supporting part supports in the bottom of prefabricating the stand for supporting part wholly supports on prefabricating the stand, has improved the stability that prefabricating stand and supporting part fasten mutually, when guaranteeing prefabricating the stand upset, prefabricating the stand upset frame and can fully exert the effect of equivalent hinge fulcrum, guaranteed prefabricating the quick upset of stand, promoted the efficiency of construction.
Preferably, the width of the reinforcing member is L1, the width of the bottom steel plate is L2, and the height of the core block is L3, L1> L3, L2> L3.
In this scheme, L1> L3, L2> L3 among this structure setting, after prefabricated stand overturns completely, it is vertical direction to place to gradually place from the horizontal direction, prefabricated stand roll-over stand acts as equivalent hinge fulcrum, it contacts ground at first and lasts for prefabricated stand provides holding power, set up the width of cross steel sheet and end steel sheet to be greater than the height of core piece at this moment, can avoid core piece direct contact to ground, the broken dew phenomenon of core piece and prefabricated stand surface concrete has been reduced, the durability of structure has been promoted, and safe and reliable of structure.
Preferably, the section lengths of the inner steel plate, the outer steel plate, the bottom steel plate and the top steel plate are L4, and the spacing between the reserved steel bars in the same row close to the inner steel plate is L5, wherein L4< L5.
In this scheme, L4< L5, such structure sets up, has guaranteed that the space of reserving between the reinforcing bar is enough abundant to prefabricated stand roll-over stand at the joint in prefabricated stand's process, and the installation is convenient high-efficient.
Preferably, the prefabricated upright further comprises a lifting lug, and the lifting lug is connected to the upper end of the supporting component.
In this scheme, the lug is connected and is fixed in the upper end of supporting part, and constructor can be through the lug with prefabricated stand roll-over stand pulling and gradually be close to prefabricated stand to place the reservation reinforcing bar in the activity chamber, will reserve the stand roll-over stand and fasten in the bottom of prefabricated stand.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that: according to the invention, the construction method that the reserved steel bars of the prefabricated stand columns extend into the movable cavity through the openings, and then the prefabricated stand columns are vertically turned through the crane is adopted, so that the effect of equivalent hinge points of the prefabricated stand columns is fully exerted, the rapid turning of the prefabricated stand columns is ensured, and the construction efficiency is improved; meanwhile, the defects that stress points are unknown, overturning is easy to occur, concrete is damaged, ribs are exposed and the like in the overturning process of the prefabricated upright posts in the prior art are overcome, the durability of the integral structure is improved, the safety and the reliability are realized, and the life safety of construction operators is guaranteed.
Drawings
Fig. 1 is a schematic structural view (a) of a prefabricated pillar roll-over stand according to an embodiment of the present invention.
Fig. 2 is a schematic structural view (ii) of a prefabricated pillar roll-over stand according to an embodiment of the present invention.
FIG. 3 is a partial schematic view of a prefabricated pillar according to an embodiment of the present invention.
Fig. 4 is a side view of a prefabricated pillar according to an embodiment of the present invention.
Fig. 5 is a schematic view showing the installation of a prefabricated pillar roll-over stand according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of the prefabricated pillar roll-over stand according to an embodiment of the present invention in the roll-over.
Fig. 7 is a schematic diagram of a prefabricated pillar roll-over stand according to an embodiment of the present invention after being turned over.
Reference numerals illustrate:
Prefabricated column roll-over stand 1
Support member 11
Reinforcing member 12
Lifting lug 3
Reserved steel bar 4
Width L1 of reinforcing member
Width L2 of bottom steel plate
Height L3 of core block
Section length L4 of inner steel plate, outer steel plate, bottom steel plate and top steel plate
Spacing L5 of reserved bars in the same row
Detailed Description
The invention will now be more fully described by way of example only and with reference to the accompanying drawings, but the invention is not thereby limited to the scope of the examples described.
The invention discloses a prefabricated upright column roll-over stand 1, which is applied to the roll-over of a prefabricated upright column 0 as shown in figures 1, 2, 3 and 4, wherein the prefabricated upright column roll-over stand 1 comprises a support part 11 and a reinforcing part 12, the support part 11 is covered on the reinforcing part 12, the reinforcing part 12 is connected to the inner wall surface of the support part 11, and a first opening 6 is formed in the lower end of the support part 11; the bottom ring of prefabricated stand 0 is equipped with reserved reinforcing bar 4, and reserved reinforcing bar 4 joint is used for fastening prefabricated stand roll-over stand 1 in first opening 6, and supporting part 11 overturns and provides the holding power along with prefabricated stand 0 circumference. The support part 11 and the reinforcing part 12 are arranged on the prefabricated upright column overturning frame 1 and are matched with each other to form a main body structure of the prefabricated upright column overturning frame 1, so that the main body structure has stronger supporting force based on the structural characteristics, the supporting effect on the prefabricated upright column 0 can be exerted in the process of overturning the prefabricated upright column 0, the supporting effect is served as an equivalent hinge fulcrum, the rapid overturning of the prefabricated upright column 0 is ensured, and the construction efficiency is improved; simultaneously, reserve reinforcing bar 4 is established through the bottom ring at prefabricated stand 0, first opening 6 is offered to the cooperation at the lower extreme of supporting part 11, reserve reinforcing bar 4 can pass first opening 6 and realize mutual joint, thereby can be fixed in prefabricated stand roll-over stand 1 on prefabricated stand 0, reduce the risk of droing, under the mutually supporting of above-mentioned structure, finally realize supporting part 11 and provide the holding power when prefabricated stand 0 circumference upset, and then overcome prefabricated stand 0 among the prior art stress point is unknown when the upset, easily take place to topple and damage defects such as concrete, dew muscle, promoted overall structure's durability, safe and reliable, construction operation personnel's life safety has been ensured.
Specifically, in this embodiment, the prefabricated upright roll-over stand 1 is matched with the prefabricated upright 0 of the core block bridge, the prefabricated upright roll-over stand 1 is hollowed out at the reserved steel bar 4 and then is installed at the 1/4 retraction section position of the bottom of the prefabricated upright 0, so that the prefabricated upright roll-over stand is integrated with the bottom structure of the prefabricated upright 0, and the roll-over stand acts as an equivalent hinge fulcrum in the upright roll-over process, thereby ensuring the rapid roll-over of the prefabricated upright 0 and improving the construction efficiency; the phenomenon that reserved steel bars 4 are bent and deformed due to the action of gravity in the overturning process of the core block type prefabricated upright post 0 is avoided, meanwhile, the phenomenon that the core block 5 and the concrete on the outer surface of the prefabricated upright post 0 are broken and exposed is reduced, and the durability of the structure is improved.
As shown in fig. 1, 2, 3 and 4, the supporting member 11 includes an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113 and a top steel plate 114 which are sequentially connected, the inner steel plate 111 is attached to and abutted against the bottom surface of the prefabricated upright post 0, a first opening 6 is formed in the inner steel plate 111, the first opening 6 is communicated with the movable cavity, and the reserved steel bar 4 penetrates through the first opening 6 and stretches into the movable cavity. The supporting part 11 mainly comprises an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113 and a top steel plate 114, which are sequentially connected to form a hollow column, a movable cavity is arranged in the middle and is communicated with the first opening 6 on the inner steel plate 111, so that conditions are provided for the extension of the reserved steel bars 4, and the prefabricated upright column roll-over stand 1 can be smoothly clamped on the reserved steel bars 4; meanwhile, the inner side steel plate 111 is attached to and abutted against the bottom surface of the prefabricated upright post 0, so that the prefabricated upright post roll-over stand 1 is stably abutted against the prefabricated upright post 0, and the situation that the prefabricated upright post roll-over stand 1 severely shakes in the overturning process of the prefabricated upright post 0 is avoided.
Specifically, rubber is adhered to the surfaces of the top steel plate 114 and the inner steel plate 111 of the prefabricated pillar roll-over stand 1, which are in contact with the core block 5, to serve as a stress buffer layer, protecting the structural surface from excessive wear.
The reinforcing member 12 is disposed in the movable chamber, and the reinforcing member 12 is connected to the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113, and the top steel plate 114. The reinforcing part 12 is arranged in the movable cavity, and a mounting space is reserved for the reinforcing part 12, so that the reinforcing part 12 can be mounted in the movable cavity and connected with the inner side steel plate 111, the outer side steel plate 112, the bottom steel plate 113 and the top steel plate 114, and the supporting part 11 provides supporting force, so that the integral structure of the prefabricated upright roll-over stand 1 formed by combining the inner side steel plate 111, the outer side steel plate 112, the bottom steel plate 113 and the top steel plate has a strong supporting effect, and the preface condition is provided for further good matching of the turnover of the prefabricated upright 0.
The reinforcing member 12 is a cross-shaped steel plate. The reinforcing member 12 is formed of a cross steel plate, and is connected to the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113, and the top steel plate 114, and provides a supporting force to the four members, thereby improving the strength of the overall structure.
The reinforcing component 12 comprises a radial plate 121, a second opening 7 is arranged below the radial plate 121, a first opening 6 is arranged below the inner steel plate 111, the first opening 6 and the second opening 7 are consistent in size, and the reserved steel bars 4 are correspondingly clamped in the first opening 6 and the second opening 7. Through setting up the second opening 7 at radial board 121, simultaneously through setting up first opening 6 on inboard steel sheet 111 for reserve reinforcing bar 4 can get into through first opening 6 and second opening 7, and correspond the joint in above-mentioned two openings, the activity intracavity is arranged in to the main part of finally reserving reinforcing bar 4, makes prefabricated stand roll-over stand 1 obtain stabilizing, avoids prefabricated stand 0 because the crooked deformation phenomenon of reserve reinforcing bar 4 that the action of gravity produced in the upset process.
The length of the first opening 6 and the second opening 7 is smaller than the length of the cross section of the inner steel plate 111 and the reinforcing member 12, and the height of the first opening 6 and the second opening 7 is greater than twice the diameter of the reserve bar 4. The length and the height of the first opening 6 and the second opening 7 are set to be the same, and the reserved steel bars 4 smoothly extend into the movable cavity to assist the prefabricated upright roll-over stand 1 to be fastened to the prefabricated upright 0, so that sufficient space is provided, and the preamble condition is provided for improving the stability of the whole structure.
The bottom of prefabricated stand 0 is provided with core piece 5, and the top steel sheet 114 of supporting part 11 supports in core piece 5, and the inboard steel sheet 111 of supporting part 11 supports in the bottom of prefabricated stand 0. The top steel plate 114 of the supporting component 11 is propped against the core block 5 arranged at the bottom of the prefabricated upright 0, the inner steel plate 111 of the supporting component 11 is propped against the bottom of the prefabricated upright 0, so that the supporting component 11 is propped against the prefabricated upright 0 integrally, the stability of fastening the prefabricated upright 0 and the supporting component 11 is improved, the prefabricated upright 1 can fully play the role of an equivalent hinge point when the prefabricated upright 0 is overturned, the quick overturning of the prefabricated upright 0 is ensured, and the construction efficiency is improved.
Specifically, the first opening 6 is aligned to the reserved steel bar 4 at the bottom of the overturning surface of the prefabricated upright post 0, then is slowly and horizontally hoisted to the root of the core block 5, and is required to be matched with the section of the core block 5 of the retraction section to form a mortise-tenon type contact surface after installation.
Specifically, a lifting appliance is installed at a lifting point at the top of the prefabricated upright post 0, the vertical overturning of the prefabricated upright post 0 is carried out through the lifting appliance, and a main stress point is supported by the junction of a bottom steel plate and an outer steel plate 112; in the overturning process, the main stress point is gradually changed from the junction of the bottom steel plate and the outer steel plate 112 to the junction of the top steel plate and the inner steel plate 111; after the upright post is overturned beyond the instability critical value, the weight stress point of the upright post is transferred to the cushion cloth roll 8 by the roll-over frame, and at the moment, the cushion cloth roll 8 is contacted with the bottom of the core block 5 in the overturning process, and the weight of the prefabricated upright post 0 is completely born by the cushion cloth roll 8.
As shown in fig. 2 and 3, the reinforcing member 12 has a width L1, the bottom steel plate 113 has a width L2, and the core block 5 has a height L3, L1> L3, and L2> L3. In this structure setting, after prefabricated stand 0 overturns completely, gradually place from the horizontal direction and be vertical direction and place, prefabricated stand roll-over stand 1 acts as equivalent hinge fulcrum, it is at first contacted to ground and lasts and provide holding power for prefabricated stand 0, set up the width of cross steel sheet and end steel sheet 113 to be greater than the height of core piece 5 this moment, can avoid core piece 5 direct contact to ground, the broken dew phenomenon of core piece 5 and prefabricated stand 0 surface concrete has been reduced, the durability of structure has been promoted, the structure is safe and reliable.
Specifically, the buffer cloth roll 8 is placed next to the outer steel plate 112 to prevent the core block 5 concrete from being damaged when turning, the placement position is right below the core block 5 of the retracting section after the turning of the upright post is completed, the core block 5 of the prefabricated upright post 0 is gradually contacted with the buffer cloth roll 8 in the turning process to avoid damage, meanwhile, after the turning of the prefabricated upright post 0 is completed, the whole body is placed in the vertical direction, at the moment, the height of the core block 5 is larger than the width of the reinforcing part 12 and the bottom steel plate 113, the compressed height of the buffer cloth roll 8 is higher than the height increased by the turning frame, at the moment, the bottom of the core block 5 is placed on the buffer cloth roll 8, the prefabricated upright post turning frame 1 is kept at a certain height from the ground, the prefabricated upright post turning frame 1 can be smoothly dropped off, the weight of the prefabricated upright post 0 is completely born by the buffer cloth roll 8, the effect of definite stress is achieved, and the prefabricated upright post turning frame 1 is convenient to detach for repeated use.
As shown in fig. 2 and 3, the cross-sectional lengths of the inner steel plate 111, the outer steel plate 112, the bottom steel plate 113 and the top steel plate 114 are L4, and the pitches of the reserved steel bars 4 in the same row near the inner steel plate 111 are L5, L4< L5. The structure arrangement ensures that the reserved space between the reserved reinforcing steel bars 4 is sufficient for the process of clamping the prefabricated upright column overturning frame 1 to the prefabricated upright column 0, and the installation process is convenient and efficient.
Specifically, the first opening 6 and the second opening 7 of the prefabricated upright roll-over stand 1 at the reserved steel bar 4 are not limited by the space between the reserved steel bars 4, larger construction errors can be tolerated, the installation and the dismantling are convenient, and the applicability is strong.
As shown in fig. 1, 3 and 4, the prefabricated pillar 0 further includes a lifting lug 3, and the lifting lug 3 is connected to an upper end of the supporting member 11. The lifting lug 3 is connected with and fixed at the upper end of the supporting part 11, and constructors can pull the prefabricated upright column roll-over stand 1 and gradually approach the prefabricated upright column 0 through the lifting lug 3, so that the reserved steel bar 4 is placed in the movable cavity, and the reserved upright column roll-over stand is fastened at the bottom of the prefabricated upright column 0.
Specifically, the lifting lugs 3 are welded to both sides of the top steel plate 114, and a plurality of lifting lugs 3 may be provided to both sides of the top steel plate 114.
The invention also discloses a construction method of the prefabricated upright column roll-over stand 1, as shown in fig. 5, 6 and 7, the prefabricated upright column roll-over stand 1 comprises a support part 11 and a reinforcing part 12, wherein a movable cavity is formed in the support part 11, the reinforcing part 12 is positioned in the movable cavity and connected in the support part 11, the lower ends of the support part 11 are respectively provided with a first opening 6, and the first openings 6 are communicated with the movable cavity; the construction method comprises the following steps: s1, a reserved steel bar 4 of a prefabricated upright post 0 stretches into a movable cavity through an opening; s2, vertically overturning the prefabricated upright post 0 through the crane so that a main stress point of the prefabricated upright post 0 is supported by the prefabricated upright post overturning frame 1. The construction method that the reserved steel bars 4 of the prefabricated upright posts 0 extend into the movable cavity through the openings, and then the prefabricated upright posts 0 are vertically turned through the crane is adopted, so that the effect of equivalent hinge points of the prefabricated upright posts 0 is fully exerted, the rapid turning of the prefabricated upright posts 0 is ensured, and the construction efficiency is improved; meanwhile, the defects that the stress points of the prefabricated upright post 0 in the prior art are unknown, the overturning is easy to occur, concrete is damaged, ribs are exposed and the like are overcome, the durability of the whole structure is improved, the prefabricated upright post is safe and reliable, and the life safety of construction operators is guaranteed.
As shown in fig. 5, 6 and 7, the supporting member 11 includes an inner steel plate 111, an outer steel plate 112, a bottom steel plate 113 and a top steel plate 114 which are sequentially connected, the four surrounding to form a movable cavity, the reinforcing member 12 is a cross steel plate, and a first opening 6 is provided below the inner steel plate 111; the step S2 specifically includes: in the overturning process, the main stress point is gradually changed from the junction of the bottom steel plate 113 and the outer steel plate 112 to the junction of the top steel plate 114 and the inner steel plate 111; when the stress point of the prefabricated upright column roll-over stand 1 and the mass center of the prefabricated upright column 0 are in the same straight line in the vertical direction, the roll-over speed of the prefabricated upright column 0 is reduced so as to reduce the shaking amplitude. The step S2 specifically comprises the control of the stress points in the overturning process and the control of the speed in the overturning process so as to reduce the shaking amplitude, further define some details in the overturning process and improve the overall efficiency in the overturning process.
In particular, a larger lifting device is selected during the overturning process to prevent the drawbacks of shaking the prefabricated uprights 0.
As shown in fig. 5, 6 and 7, the front end of the prefabricated upright post is provided with a cushion cloth roll 8, the bottom of the prefabricated upright post 0 is provided with a core block 5, and the method further comprises the following steps after the step S1 and before the step S2: s3, arranging buffer layers on the top steel plate 114 and the inner steel plate 111 of the prefabricated upright column roll-over stand 1, which are in contact with the core block 5, wherein the buffer layers can be adhered with rubber; s4, placing the cushion cloth roll 8 at a position close to the outer steel plate 112, wherein the placing position is right below the overturning completion of the prefabricated upright post 0, so that the prefabricated upright post 0 can be pressed on the cushion cloth roll 8 after overturning; s5, installing a lifting appliance at a lifting point at the end part of the prefabricated upright post 0. After the prefabricated upright roll-over stand 1 is clamped to the prefabricated upright 0, before the prefabricated upright 0 is turned over, a buffer layer is stuck at the positions of the top steel plate 114 and the inner steel plate 111, the buffer cloth roll 8 is placed, and a lifting appliance is installed at a lifting point of the end part of the prefabricated upright 0, so that sufficient preamble conditions are provided for subsequent turning work, and smooth and efficient turning process is ensured.
Specifically, in this embodiment, the buffer layer is disposed at the positions of the top steel plate 114 and the inner steel plate 111, and is made of rubber, and in other embodiments, the buffer layer may be disposed at the core block 5 of the prefabricated upright 0 and other positions at the bottom of the prefabricated upright 0, so that the prefabricated upright 0 and the prefabricated upright roll-over stand 1 are protected by the buffer layer when in contact.
As shown in fig. 5, 6 and 7, the construction method further includes the following steps after S2: s6, after the prefabricated upright post 0 exceeds a destabilizing critical value in the overturning process, the stress point is gradually transferred onto the cushion cloth roll 8 by the prefabricated upright post overturning frame 1, and the core block is gradually contacted with the cushion cloth roll 8. S7, after the prefabricated upright post 0 is overturned until the bottom surface of the core block 5 vertically contacts with the cushion cloth roll 8, gradually lifting the prefabricated upright post 0 by using a crane; s8, disassembling the prefabricated upright column roll-over stand 1. After overturning the prefabricated upright post 0, adjusting according to the overturning degree, gradually transferring stress points from the prefabricated upright post 0 to the buffer cloth roll 8 in the process of gradually approaching to the instability critical value, and gradually contacting the buffer cloth roll 8 by the core block 5 until the bottom of the core block 5 completely contacts the buffer cloth roll 8, and at the moment, further lifting the prefabricated upright post 0 through the crane so as to facilitate the disassembly of the prefabricated upright post overturning frame 1 for convenient reuse.
Specifically, the prefabricated upright column roll-over stand 1 has high recycling rate, and is economical and environment-friendly.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (14)
1. The construction method of the prefabricated upright column roll-over stand is characterized in that the prefabricated upright column roll-over stand comprises a supporting component and a reinforcing component, wherein a movable cavity is formed in the supporting component, the reinforcing component is positioned in the movable cavity and connected in the supporting component, the lower ends of the supporting component are respectively provided with a first opening, and the first openings are communicated with the movable cavity;
the construction method comprises the following steps:
s1, a reserved steel bar of a prefabricated upright post stretches into the movable cavity through the opening;
s2, vertically overturning the prefabricated upright post through the crane, so that a main stress point of the prefabricated upright post is supported by the prefabricated upright post overturning frame.
2. The construction method of the prefabricated upright roll-over stand according to claim 1, wherein the supporting component comprises an inner steel plate, an outer steel plate, a bottom steel plate and a top steel plate which are sequentially connected, the four steel plates are enclosed to form the movable cavity, the reinforcing component is a cross steel plate, and the first opening is arranged below the inner steel plate;
the step S2 specifically includes:
in the overturning process, the main stress point is gradually changed from the junction of the bottom steel plate and the outer steel plate to the junction of the top steel plate and the inner steel plate;
when the stress point of the prefabricated upright column overturning frame and the mass center of the prefabricated upright column are in the same straight line in the vertical direction, the overturning speed of the prefabricated upright column is reduced so as to reduce the shaking amplitude.
3. The method for constructing a prefabricated upright roll-over stand according to claim 2, wherein a cushion cloth roll is arranged at the front end of the prefabricated upright, a core block is arranged at the bottom of the prefabricated upright, and the method further comprises the following steps after the step S1 and before the step S2:
s3, arranging buffer layers on the top steel plate and the inner steel plate, which are contacted with the core block, of the prefabricated upright column roll-over stand, wherein the buffer layers can be adhered with rubber;
s4, placing the buffer cloth roll at a position close to the outer steel plate, wherein the placing position is right below the inverted prefabricated upright post, so that the inverted prefabricated upright post can be pressed on the buffer cloth roll;
s5, installing a lifting appliance at a lifting point at the end part of the prefabricated upright post.
4. A method of constructing a prefabricated pillar roll-over stand as claimed in claim 3, further comprising the steps of, after S2:
s6, after the prefabricated upright post exceeds a destabilizing critical value in the overturning process, the stress point is gradually transferred to the buffer cloth roll by the prefabricated upright post overturning frame, and the core block is gradually contacted with the buffer cloth roll;
s7, after the prefabricated upright post is overturned to the bottom surface of the core block to vertically contact with the cushion cloth roll, gradually lifting the prefabricated upright post by using the crane;
s8, disassembling the prefabricated upright column roll-over stand.
5. The prefabricated upright column overturning frame is characterized by being applied to overturning of the prefabricated upright column, and comprises a supporting part and a reinforcing part, wherein the supporting part is covered on the reinforcing part, the reinforcing part is connected to the inner wall surface of the supporting part, and a first opening is formed in the lower end of the supporting part;
the bottom ring of prefabricated stand is equipped with the reservation reinforcing bar, reserve reinforcing bar joint in first opening is used for fastening prefabricated stand roll-over stand, supporting part is along with prefabricated stand circumference upset and provide holding power.
6. The prefabricated upright roll-over stand of claim 5, wherein the support member comprises an inner steel plate, an outer steel plate, a bottom steel plate and a top steel plate which are sequentially connected, a movable cavity is formed by surrounding the inner steel plate, the inner steel plate is attached to and abutted against the bottom surface of the prefabricated upright, the inner steel plate is provided with the first opening, the first opening is communicated with the movable cavity, and the reserved steel bar penetrates through the first opening and stretches into the movable cavity.
7. The prefabricated pillar roll-over stand of claim 6, wherein said reinforcement member is disposed within said movable cavity and said reinforcement member is connected to said inner side steel panel, said outer side steel panel, said bottom steel panel and said top steel panel.
8. The prefabricated pillar roll-over stand of claim 7, wherein said reinforcing member is a cross steel plate.
9. The prefabricated column roll-over stand of claim 6, wherein the reinforcing member comprises a radial plate, a second opening is formed below the radial plate, the first opening is formed below the inner steel plate, the first opening and the second opening are identical in size, and the reserved steel bars are correspondingly clamped in the first opening and the second opening.
10. The prefabricated pillar roll-over stand of claim 9, wherein the first opening and the second opening have a length smaller than a length of a cross section of the inner steel plate and the reinforcing member, and a height of the first opening and the second opening is greater than twice a diameter of the reserved steel bar.
11. The prefabricated pillar roll-over stand of claim 6, wherein a core block is provided at a bottom of said prefabricated pillar, a top steel plate of said support member abuts against said core block, and an inner steel plate of said support member abuts against a bottom of said prefabricated pillar.
12. The prefabricated pillar roll-over stand of claim 11, wherein said reinforcing member has a width L1, said bottom steel plate has a width L2, and said core block has a height L3, L1> L3, L2> L3.
13. The prefabricated pillar roll-over stand of claim 6, wherein said inner steel plate, said outer steel plate, said bottom steel plate and said top steel plate have a cross-sectional length of L4, and wherein the spacing of said reserved bars in the same row adjacent to said inner steel plate is L5, L4< L5.
14. The prefabricated pillar roll-over stand of claim 5, further comprising a lifting lug attached to an upper end of said support member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310255340.8A CN116289640A (en) | 2023-03-15 | 2023-03-15 | Prefabricated upright column roll-over stand and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310255340.8A CN116289640A (en) | 2023-03-15 | 2023-03-15 | Prefabricated upright column roll-over stand and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116289640A true CN116289640A (en) | 2023-06-23 |
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ID=86784691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310255340.8A Pending CN116289640A (en) | 2023-03-15 | 2023-03-15 | Prefabricated upright column roll-over stand and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116289640A (en) |
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2023
- 2023-03-15 CN CN202310255340.8A patent/CN116289640A/en active Pending
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