CN112922326A - Lightweight hydraulic reverse mold lifting system and construction method thereof - Google Patents
Lightweight hydraulic reverse mold lifting system and construction method thereof Download PDFInfo
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- CN112922326A CN112922326A CN202110236709.1A CN202110236709A CN112922326A CN 112922326 A CN112922326 A CN 112922326A CN 202110236709 A CN202110236709 A CN 202110236709A CN 112922326 A CN112922326 A CN 112922326A
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- 238000010276 construction Methods 0.000 title claims abstract description 87
- 238000009415 formwork Methods 0.000 claims abstract description 60
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 18
- 239000010959 steel Substances 0.000 description 18
- 230000000149 penetrating effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 238000004080 punching Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
- E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
- E04G11/20—Movable forms; Movable forms for moulding cylindrical, conical or hyperbolical structures; Templates serving as forms for positioning blocks or the like
- E04G11/22—Sliding forms raised continuously or step-by-step and being in contact with the poured concrete during raising and which are not anchored in the hardened concrete; Arrangements of lifting means therefor
- E04G11/24—Construction of lifting jacks or climbing rods for sliding forms
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
Abstract
The invention relates to a lightweight hydraulic reverse mold lifting system and a construction method, wherein the lifting system comprises: the support rods are partially embedded in the poured columnar hollow structure; the operating platform is sleeved on the exposed part of the supporting rod; the center-penetrating jack is sleeved on the exposed part of the supporting rod and positioned on the operating platform, the center-penetrating jack is fixedly connected with the operating platform, and the center-penetrating jack can drive the operating platform to lift upwards along the exposed part of the supporting rod; and the hoisting structure is fixedly arranged at the bottom of the operating platform and is used for realizing the upward transportation of the formwork supporting structure. The formwork supporting structure is transported upwards by the hoisting structure, so that the common defects of pitted surface, tensile crack and the like on the surface of a concrete structure can be avoided, the perpendicularity of the formwork supporting structure can be ensured, and the construction quality is good. The reverse mould lifting system is used for driving the operation platform to lift through the center-penetrating jack, is convenient and effective, reduces the labor intensity and accelerates the construction progress.
Description
Technical Field
The invention relates to the field of building construction engineering, in particular to a lightweight hydraulic reverse formwork lifting system and a construction method thereof.
Background
The environmental protection industry is developed rapidly day by day, as an important downstream waste incineration power plant of the environmental protection industry, the demand of each city is increasingly increased, the core facility waste incineration power generation workshop and a treatment line can convert waste harmless treatment into electric energy, the generated flue gas is purified in multiple layers, and finally the product steam is discharged through a chimney, and the height of the common chimney is 80-210 m.
The reinforced concrete chimney in the electric power construction project is a high-rise structure and is a landmark building of the whole power plant project. In the construction process of the chimney, the vertical transportation of the reinforced concrete chimney construction is a main process in the whole construction, and the sliding formwork construction process is mostly adopted for the vertical transportation.
With the improvement of the environmental protection consciousness of the whole society, the slip form construction is carried out by directly sliding the template, and after the pouring and forming are carried out in one step, the template is forcibly driven to move upwards by utilizing the thrust provided by the oil cylinder, so that the template and the surface of the chimney slide relatively. Therefore, the slip form construction mode is adopted, so that the common quality problems such as pitted surface, pulling crack and the like are easily generated on the surface of the chimney, and the construction quality is poor. And 24h of uninterrupted operation is needed for the sliding mode, the verticality control difficulty of the vertical structure is high, the number of matched devices is large, and the difficulty of field construction organization is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a lightweight hydraulic reverse formwork lifting system and a construction method thereof, and solves the problems of general quality problems of surface pitting, pulling crack and the like, poor construction quality, high verticality control difficulty and the like in the conventional slip formwork construction.
The technical scheme for realizing the purpose is as follows:
the invention provides a lightweight hydraulic reverse formwork lifting system, which is used for cast-in-place construction of a columnar hollow structure, and comprises:
the supporting rod is partially embedded in the poured columnar hollow structure, and part of the supporting rod extends upwards from the top of the poured columnar hollow structure to form an exposed part;
the operation platform is sleeved on the exposed part of the supporting rod, and the size of the operation platform is larger than that of the cross section of the columnar hollow structure;
the center-penetrating jack is sleeved on the exposed part of the supporting rod and positioned on the operating platform, the center-penetrating jack is fixedly connected with the operating platform, the center-penetrating jack can drive the operating platform to lift upwards along the exposed part of the supporting rod, and the supporting rod is tightly held by the center-penetrating jack to fasten the operating platform on the supporting rod and enable the operating platform to be positioned above the poured columnar hollow structure; and
and the hoisting structure is fixedly arranged at the bottom of the operating platform, can be connected with the corresponding formwork supporting structure before the cast columnar hollow structure is demolded, and can hoist the formwork supporting structure upwards to the next construction section after the formwork supporting structure is demolished.
The formwork reversing lifting system is used for cast-in-place construction of a columnar hollow structure, the formwork supporting structure is lifted upwards by utilizing the operating platform which is lifted upwards to construct a concrete structure at the upper part, structures such as a guide rail and the like required by a sliding formwork do not need to be arranged on the formwork supporting structure, and the common defects such as pitted surface, pulling crack and the like generated on the surface of the concrete structure can be avoided. The formwork supporting structure is lifted upwards by the lifting structure, the perpendicularity of the formwork supporting structure can be guaranteed, the formwork supporting structure cannot be influenced by the perpendicularity of the sliding rail in sliding formwork construction, and the construction quality is good. The reverse mould lifting system is used for driving the operation platform to lift through the center-penetrating jack, is convenient and effective, reduces the labor intensity and accelerates the construction progress.
The light hydraulic reverse mold lifting system is further improved in that a support frame is vertically arranged in the middle of the operating platform, and an inclined support is connected between the top of the support frame and the edge of the operating platform.
The lightweight hydraulic reverse mold lifting system is further improved in that the system further comprises a hoisting mast arranged on the support frame, the hoisting mast is arranged in an inclined manner, and one end of the hoisting mast extends to the outer side of the operating platform to form an overhanging end;
the pulley is installed to the department of encorbelmenting the end, the pulley department is around being equipped with the lifting rope, the one end of lifting rope is walked around the pulley and is hung down and put and end connection has the lifting hook, the other end and the power unit of lifting rope are connected, through the steerable receipts of power unit are received and released the lifting rope.
The further improvement of the lightweight hydraulic reverse mould lifting system is that a limiting part which can be adjusted in an up-and-down moving mode is connected to the exposed part of the supporting rod, the limiting part is arranged above the operating platform, and the jacking range of the center-penetrating jack can be limited through the limiting part.
The light hydraulic reverse mold lifting system is further improved in that an outer side hanging rack and an inner side hanging rack are arranged at the bottom of the operating platform corresponding to the arrangement position of the columnar hollow structure.
The invention also provides a construction method of the lightweight hydraulic reverse formwork lifting system, which is used for cast-in-place construction of a columnar hollow structure, and the construction method comprises the following steps:
providing a support rod, partially embedding the support rod in the poured columnar hollow structure, and enabling part of the support rod to extend upwards from the top of the poured columnar hollow structure to form an exposed part;
assembling by means of a supporting jig to form an operating platform positioned above the poured columnar hollow structure, wherein the size of the formed operating platform is larger than that of the cross section of the columnar hollow structure;
providing a center-penetrating jack, sleeving the center-penetrating jack on the exposed part of the supporting rod and on the operating platform, fixedly connecting the center-penetrating jack with the operating platform, and fastening the operating platform on the supporting rod by tightly holding the supporting rod by the center-penetrating jack;
providing a hoisting structure, and fixedly arranging the hoisting structure at the bottom of the operating platform;
before a formwork structure of a poured columnar hollow structure is dismantled, the hoisting structure is connected with the formwork structure, and after the formwork structure is dismantled, the hoisting structure is used for hoisting the formwork structure upwards to a next construction section;
the center-penetrating jack is used for driving the operating platform to lift upwards along the exposed part of the supporting rod, and the operating platform is tightly held on the supporting rod through the center-penetrating jack after the operating platform is lifted in place so as to be fastened on the supporting rod;
and installing a formwork structure at the corresponding construction section, pouring concrete to form a columnar hollow structure, lengthening the supporting rod, and repeatedly hoisting the formwork structure and lifting the operating platform until the construction of the columnar hollow structure is finished.
The construction method of the invention is further improved in that after the operation platform is assembled, the method also comprises the following steps:
a support frame is vertically arranged in the middle of the operating platform;
and a plurality of inclined struts are connected between the top of the supporting frame and the edge of the operating platform.
The construction method of the invention is further improved in that the construction method further comprises the following steps:
connecting a hoisting mast on the support frame, arranging the hoisting mast in an inclined manner, and extending one end of the hoisting mast to the outer side of the operating platform to form an overhanging end;
a pulley is arranged at the overhanging end, a lifting rope is wound at the pulley, one end of the lifting rope is wound around the pulley and then is hung downwards, the end part of the lifting rope is connected with a lifting hook, and the other end of the lifting rope is connected with a power mechanism;
the lifting hook is used for hooking the component to be transported, the lifting rope is recovered through the power mechanism, and the component to be transported is lifted to the operating platform.
The construction method of the invention is further improved in that the construction method further comprises the following steps:
providing a limiting piece, installing the limiting piece on the exposed part of the supporting rod in a manner of up-and-down movement adjustment, enabling the limiting piece to be arranged above the operating platform, and limiting the jacking range of the center-penetrating jack by using the limiting piece;
after the operating platform is lifted upwards, the operating platform moves upwards along the exposed part of the supporting rod to adjust the position of the limiting piece.
The construction method of the invention is further improved in that when the operation platform is assembled, the method also comprises the following steps:
and assembling the bottom of the operating platform corresponding to the position where the columnar hollow structure is arranged to form an outer side hanging rack and an inner side hanging rack, and forming a construction platform for cast-in-situ construction of the columnar hollow structure by utilizing the outer side hanging rack and the inner side hanging rack.
Drawings
Fig. 1 is a schematic structural diagram of a lightweight hydraulic reverse mold lifting system according to the present invention.
Fig. 2 is an enlarged schematic view of a part of the structure of the lightweight hydraulic reverse mold lifting system of the present invention.
Fig. 3 and 4 are schematic diagrams illustrating the exploded steps of the lightweight hydraulic reverse formwork lifting system for lifting the formwork structure upwards.
Fig. 5 is a flowchart of a construction method of the lightweight hydraulic reverse mold lifting system of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
Referring to fig. 1, the invention provides a lightweight hydraulic reverse formwork lifting system and a construction method thereof, which are suitable for cast-in-place construction of a columnar hollow structure, such as a concrete high-rise center pier, a chimney and other structures. The lifting system and the construction method can avoid the structural damage to the chimney surface caused by the overlarge friction force between the template and the chimney surface, the punching jack is connected with the operation platform, and the template structure for cast-in-place construction is arranged under the operation platform, so that the punching jack can drive the operation platform to synchronously lift up, the operation is convenient and effective, the labor intensity is reduced, and the construction progress is accelerated. The lightweight hydraulic reverse mold lifting system and the construction method thereof according to the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of the lightweight hydraulic reverse mold lifting system of the present invention is shown. Referring to fig. 2, an enlarged schematic view of a part of the structure of the lightweight hydraulic reverse mold lifting system of the present invention is shown. The lightweight hydraulic reverse mold lifting system and the construction method thereof according to the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the lightweight hydraulic reverse formwork lifting system 20 of the present invention is used for cast-in-situ construction of a columnar hollow structure, the lifting system 20 includes a support rod 21, an operating platform 22, a through jack 23 and a lifting structure 24, the support rod 21 is partially embedded in the poured columnar hollow structure 10, and a part of the support rod 21 extends upward from the top of the poured columnar hollow structure 10 to form an exposed part 211. The operation platform 22 is sleeved on the exposed portion 211 of the support rod 21, and the size of the operation platform 22 is larger than the size of the cross section of the columnar hollow structure 10 (i.e. the outer diameter of the columnar hollow structure 10). The penetrating jack 23 is sleeved on the exposed part 211 of the supporting rod 21 and located above the operating platform 22, the penetrating jack 23 is fixedly connected with the operating platform 22, the penetrating jack 23 can drive the operating platform 22 to lift upwards along the exposed part 211 of the supporting rod 21, and then the penetrating jack 23 tightly holds the supporting rod 21 to fasten the operating platform 22 on the supporting rod 21 and enable the operating platform 22 to be located above the poured columnar hollow structure 10. The hoisting structure 24 is fixedly arranged at the bottom of the operating platform 22, the hoisting structure 24 can be connected with the corresponding formwork supporting structure 11 before the cast columnar hollow structure 10 is demolded, and the formwork supporting structure 11 can be hoisted upwards to the next construction section after the formwork supporting structure 11 is demolished.
The columnar hollow structure is formed by gradually pouring upwards in sections, when concrete in the current section is poured in the columnar hollow structure, the supporting rod 21 is partially buried and fixed, when the operating platform 22 is erected, the operating platform 22 can be supported by means of a jig frame erected on the ground, after the center-penetrating jack 23 is installed, the jig frame is detached, and then the operating platform 22 is fixed on the exposed part 211 of the supporting rod 21 by means of the center-penetrating jack 23. After the concrete of the current section is poured, steel bars of the next construction section are bound on the concrete, when the concrete poured in the current section reaches the form removal strength, the hoisting structure 24 is used for connecting the corresponding form supporting structure, then the form removal is carried out, the form supporting structure is hoisted to the next construction section through the hoisting structure 24, then the form supporting structure is erected, and the concrete construction of the next construction section is carried out.
Specifically, the formwork structure 11 includes the big steel mould of design, sets up rings at the top of the big steel mould of design, and handling structure 24 can catch the rings at this big steel mould top of design to the turnover of the big steel mould of realization design is transported backward. The outside main rib of the big steel mould of design adopts 50mm 30mm 3 mm's rectangle side pipe, interval 300mm, and the stupefied 2 channel steel butt welds of adopting of back of the body, and the regional interval of main atress is 700mm, adopts steel split bolt to take-up two big steel moulds of design fixed, and steel split bolt horizontal interval is not more than 900 mm.
In one embodiment of the present invention, as shown in fig. 1, a support frame 25 is erected in the middle of the operation platform 22, and a diagonal brace 251 is connected between the top of the support frame 25 and the edge of the operation platform 22. Bracing 251 is equipped with a plurality ofly, sets up along the outside interval of support frame 25, through bracing 251 with support frame 25 and operation platform 22 drawknot connection to improve operation platform 22's overall stability.
Preferably, the operation platform 22 includes a plurality of main beams, a plurality of secondary beams and a plurality of wood gangplank, the main beams and the secondary beams are connected in a staggered manner in the transverse and longitudinal directions to form a support frame, the wood gangplank is fully paved on the support frame to form the operation platform 22, the main beams and the secondary beams are formed by combining double channel steel at a distance of 9cm from back to back, and the secondary beams are arranged on the main beams.
Preferably, a through hole is formed in the middle of the operating platform 22, a part of the bottom of the supporting frame 25 passes through the through hole and is located below the operating platform 22, a plurality of tie rods are connected between the bottom of the supporting frame 25 and the bottom of the operating platform 22 in a tie manner and are arranged in an inclined manner, the tie rods are connected to the position, close to the cylindrical hollow structure 10, of the operating platform 22, and the supporting frame 25 and the operating platform 22 are connected to form a stable integrated structure through the arrangement of the tie rods, so that the overall stability of the operating platform 22 is improved.
In one embodiment of the present invention, as shown in fig. 1, the lifting system 20 of the present invention further comprises a lifting mast 26 disposed on the support frame 25, wherein the lifting mast 26 is disposed in an inclined manner and has one end extending to the outside of the operation platform 22 to form an overhanging end 261;
a pulley 262 is arranged at the overhanging end 261, a lifting rope 263 is wound at the pulley 262, one end of the lifting rope 263 bypasses the pulley 262 and hangs downwards, the end part is connected with a lifting hook 264, the other end of the lifting rope 263 is connected with a power mechanism 265, and the lifting rope 263 can be controlled to be folded and unfolded through the power mechanism 265.
The cantilevered end 261 of the lifting mast 26 is at a higher elevation than the end of the lifting mast 26 that is connected to the support 25. The power mechanism 265 is disposed at the top of the supporting member 25, the power mechanism 265 is preferably a winch, and can implement retraction of the lifting rope 263, when the lifting rope 263 is lowered by the winch, the lifting hook 264 at the end of the lifting rope 263 moves downward to hook the component to be lifted on the ground, and the lifting rope 263 is wound by the winch to lift the component to be lifted on the operating platform 22. The member to be lifted can be a steel bar with a cylindrical hollow structure.
Preferably, two lifting masts 26 are symmetrically arranged on two sides of the support frame 25, so that when the lifting masts 26 are used for lifting members, the weight of the members lifted by the lifting masts 26 on the two sides is equal, the stress of the operating platform 22 and the support frame 25 is balanced, and the stability of the operating platform 22 and the support frame 25 is improved.
In an embodiment of the present invention, as shown in fig. 2, a limiting member 212 capable of adjusting in an up-and-down manner is connected to the exposed portion 211 of the supporting rod 21, the limiting member 212 is disposed above the operating platform 22, and the limiting member 212 can limit the lifting range of the center-penetrating jack 23. The limiting member 212 can control the jacking range of the through jack 23, so that excessive jacking of the through jack 23 can be prevented, and the construction safety is ensured.
When the center-penetrating jack 23 is used to lift the operating platform 22, the position of the limiting member 212 on the exposed portion 211 of the supporting rod 21 is adjusted, that is, the distance between the limiting member 212 and the center-penetrating jack 23 is controlled, and the limiting member 212 is used to limit the lifting range of the center-penetrating jack 23. After the penetrating jack 23 drives the operating platform 22 to jack in place, the position of the limiting member 212 is adjusted upward, and the penetrating jack 23 is driven to jack until the operating platform 22 jacks in place.
In a preferred embodiment, the supporting rod 21 is a threaded rod, the limiting member 212 is screwed on the exposed portion 211 of the supporting rod 21, and the limiting member 212 can be adjusted by screwing the limiting member 212 to move up and down.
In another preferred embodiment, the position-limiting member 212 is sleeved on the exposed portion 211 of the supporting rod 21, the position-limiting member 212 can move up and down on the exposed portion 211 to adjust the position, a plurality of tightening bolts are screwed on the position-limiting member 212, and after the position-limiting member 212 is adjusted, the tightening bolts are tightened on the supporting rod 21 by screwing the tightening bolts to fasten the position-limiting member 212 on the supporting rod 21.
In an embodiment of the present invention, as shown in fig. 1 and 2, an outer hanger 271 and an inner hanger 272 are disposed at the bottom of the operation platform 22 corresponding to the positions of the cylindrical hollow structure. This outside stores pylon 271 and inboard stores pylon 272 are the construction platform of the cast-in-place construction of column hollow structure, and the operation personnel can stand and carry out the installation of template and the ligature of reinforcing bar on construction platform. Preferably, the outer hanger 271 and the inner hanger 272 are double-layer hangers formed by welding square steel pipes. In order to improve the construction safety, the outer side surfaces of the outer hanging rack 271 and the inner hanging rack 272 are provided with steel plate net protection.
In order to ensure the construction safety, a guard rail 221 is vertically arranged at the edge of the operating platform 22, and the guard rail 221 plays a role in edge protection and improves the construction safety.
In an embodiment of the present invention, a plurality of support rods 21 are arranged at intervals along the columnar hollow structure, the support rods 21 are continuously lengthened along with the increase of the construction height of the columnar hollow structure 10, and the support rods 21 are made of steel pipes with a diameter of 48 × 3.5mm, and are lengthened by welding, so as to replace the steel bars at the corresponding positions of the columnar hollow structure. The hoisting structure 24 is a hand-operated hoist fixed on the operation platform 22, and the lifting of the formwork supporting structure 11 is controlled by the hand-operated hoist.
The operating platform 22 is provided with a hydraulic control console which is connected with the punching jacks through a plurality of groups of oil pipes in a driving mode, the hydraulic control console is arranged in a centralized mode and is used for connecting the circuit and the oil tank in parallel, when the electromagnetic directional valve returns oil circularly, oil is discharged from the punching jacks to return to an oil storage tank of the oil pump, so that oil is fed and returned repeatedly, the punching jacks drive the operating platform to ascend continuously, the operation is simple and convenient, the observation is convenient, and the operation synchronization is ensured. The locating part is arranged for horizontal control of the lifting operation platform of the center-penetrating jack, so that the horizontal error of the lifting operation platform is reduced, and the integral flatness of the operation platform is guaranteed.
The construction process of the hoisting system will be explained below.
The height of the columnar hollow structure is higher, a section of columnar hollow structure is cast on the ground firstly, a cast columnar hollow structure 10 is formed, a plurality of support rods 21 are embedded in the cast columnar hollow structure 10, the tops of the support rods 21 extend out of the top of the cast columnar hollow structure 10 to form an exposed part, as shown in fig. 1 and 2, a jig frame is arranged on the ground, an operation platform 22 is erected on the jig frame, the height of the operation platform 22 is higher than that of the cast columnar hollow structure 10, then a through jack 23 is arranged, the operation platform 22 is fastened on the support rods 21 by the through jack 23, an outer hanging frame 271 and an inner hanging frame 272 are connected on the operation platform 22, reinforcing steel bars of the next construction section on the cast columnar hollow structure 10 are bound by the outer hanging frame 271 and the inner hanging frame 272, and the hanging frame structure 24 is used for hooking the support structure 11 by matching with the drawing shown in fig. 3 and 4, after the form is removed, the hoisting structure 24 is used for lifting the formwork supporting structure 11 to the next construction section, and then the formwork supporting structure 11 is fixed. And starting the center-penetrating jack 23, jacking the operating platform 22 upwards, pouring concrete in a corresponding section on the construction platform after jacking in place, binding reinforcing steel bars in the next construction section, then removing the formwork and lifting the formwork supporting structure after the concrete reaches the design strength, installing the formwork supporting structure, jacking the operating platform, and repeating the steps until the construction of the columnar hollow structure 10 is completed.
The handling structure can catch on a formwork structure in advance, can avoid the phenomenon that the template drops when the reverse mould appears, has improved the security of work progress.
The invention also provides a construction method of the lightweight hydraulic reverse mold lifting system, which is explained below.
The construction method of the lightweight hydraulic reverse formwork lifting system provided by the invention is used for cast-in-place construction of a columnar hollow structure, and comprises the following steps:
as shown in fig. 5, step S101 is executed to provide a support rod, embed a portion of the support rod in the poured columnar hollow structure, and allow a portion of the support rod to extend upward from the top of the poured columnar hollow structure to form an exposed portion; then, step S102 is executed;
step S102 is executed, an operation platform positioned above the poured columnar hollow structure is formed by means of assembly of a supporting jig, and the size of the formed operation platform is larger than that of the cross section of the columnar hollow structure; then, step S103 is executed;
step S103 is executed, a center-penetrating jack is provided, the center-penetrating jack is sleeved on the exposed part of the supporting rod and is positioned on the operating platform, the center-penetrating jack is fixedly connected with the operating platform, and the operating platform is fastened on the supporting rod by tightly holding the supporting rod by the center-penetrating jack; then, step S104 is executed;
step S104 is executed, a hoisting structure is provided, and the hoisting structure is fixedly arranged at the bottom of the operation platform; then, step S105 is executed;
step S105 is executed, before the formwork structure of the poured columnar hollow structure is dismantled, the hoisting structure is connected with the formwork structure, and after the formwork structure is dismantled, the formwork structure is hoisted upwards to the next construction section by the hoisting structure; then, step S106 is executed;
step S106 is executed, the center-penetrating jack is utilized to drive the operating platform to lift upwards along the exposed part of the supporting rod, and the operating platform is fastened on the supporting rod by tightly holding the supporting rod through the center-penetrating jack after the operating platform is lifted in place; then, step S107 is executed;
and S107, installing a formwork supporting structure in the corresponding construction section, pouring concrete to form a columnar hollow structure, lengthening the supporting rod, and repeatedly hoisting the formwork supporting structure and lifting the operation platform until the construction of the columnar hollow structure is finished.
In a specific embodiment of the present invention, after the assembling to form the operation platform, the method further includes:
as shown in fig. 1, a support 25 is vertically provided in the middle of the operation platform 22;
a plurality of braces 251 are connected between the top of the support frame 25 and the edge of the operation platform 22.
The bracing 251 connects the support frame 25 and the operation platform 22 in a drawknot manner, so as to improve the overall stability of the operation platform 22.
In one embodiment of the present invention, the method further comprises:
as shown in fig. 1, a hoisting mast 26 is connected to the support frame 25, the hoisting mast 26 is disposed in an inclined manner, and an end of the hoisting mast 26 extends to the outside of the operation platform 22 to form an overhanging end 261;
a pulley 262 is arranged at the overhanging end 261, a lifting rope 263 is wound at the pulley 262, one end of the lifting rope 263 is wound around the pulley 262 and then is downwards laid, the end part is connected with a lifting hook 264, and the other end of the lifting rope 263 is connected with a power mechanism 265;
the component to be transported is hung on the operation platform 22 by hooking the component to be transported by the hook 264 and withdrawing the hanging rope 263 by the power mechanism 265.
The hoisting member is preferably a steel bar.
In one embodiment of the present invention, the method further comprises:
as shown in fig. 2, a limiting member 212 is provided, the limiting member 212 is mounted on the exposed portion 211 of the supporting rod 21 in an up-and-down adjustable manner, the limiting member 212 is disposed above the operating platform 22, and the limiting member 212 is used to limit the jacking range of the center-penetrating jack 23;
after the operation platform 22 is lifted upwards, the position of the adjustment limiting member 212 is moved upwards along the exposed portion 211 of the support rod 21.
In a specific embodiment of the present invention, when the operation platform is assembled, the method further includes:
as shown in fig. 2, an outer hanger 271 and an inner hanger 272 are assembled at the bottom of the operation platform 22 corresponding to the installation position of the cylindrical hollow structure, and the outer hanger 271 and the inner hanger 272 are used to form a construction platform for cast-in-place construction of the cylindrical hollow structure.
In the cast-in-place construction process, jacking of the operating platform and upward transportation of the formwork supporting structure are alternately carried out, the hydraulic control console drives the center penetrating jack to drive the operating platform to jack layer by layer when the operating platform jacks, procedures such as concrete pouring, jacking of the operating platform, steel bar binding and transportation of the formwork supporting structure are closely linked and alternately carried out, and layer by layer circular construction is carried out until the jacking reaches the designed elevation of the top.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a lightweight hydraulic pressure reverse mould promotes system for column hollow structure's cast-in-place construction, its characterized in that, it includes to promote the system:
the supporting rod is partially embedded in the poured columnar hollow structure, and part of the supporting rod extends upwards from the top of the poured columnar hollow structure to form an exposed part;
the operation platform is sleeved on the exposed part of the supporting rod, and the size of the operation platform is larger than that of the cross section of the columnar hollow structure;
the center-penetrating jack is sleeved on the exposed part of the supporting rod and positioned on the operating platform, the center-penetrating jack is fixedly connected with the operating platform, the center-penetrating jack can drive the operating platform to lift upwards along the exposed part of the supporting rod, and the supporting rod is tightly held by the center-penetrating jack to fasten the operating platform on the supporting rod and enable the operating platform to be positioned above the poured columnar hollow structure; and
and the hoisting structure is fixedly arranged at the bottom of the operating platform, can be connected with the corresponding formwork supporting structure before the cast columnar hollow structure is demolded, and can hoist the formwork supporting structure upwards to the next construction section after the formwork supporting structure is demolished.
2. The system of claim 1, wherein a support frame is erected in the middle of the operating platform, and a diagonal brace is connected between the top of the support frame and the edge of the operating platform.
3. The lightweight hydraulic die-sinking lift system of claim 2, further comprising a lifting mast disposed on the support frame, the lifting mast being disposed in an inclined configuration with an end portion extending outside the operating platform to form an overhanging end;
the pulley is installed to the department of encorbelmenting the end, the pulley department is around being equipped with the lifting rope, the one end of lifting rope is walked around the pulley and is hung down and put and end connection has the lifting hook, the other end and the power unit of lifting rope are connected, through the steerable receipts of power unit are received and released the lifting rope.
4. The lightweight hydraulic reverse mold lifting system according to claim 1, wherein a stopper that can be adjusted in an up-and-down direction is connected to an exposed portion of the support rod, the stopper is provided above the operation platform, and a lifting range of the center-piercing jack can be restricted by the stopper.
5. The system of claim 1, wherein an outer hanger and an inner hanger are provided at the bottom of the operation platform corresponding to the position of the cylindrical hollow structure.
6. A construction method of a lightweight hydraulic reverse formwork lifting system is used for cast-in-place construction of a columnar hollow structure and is characterized by comprising the following steps:
providing a support rod, partially embedding the support rod in the poured columnar hollow structure, and enabling part of the support rod to extend upwards from the top of the poured columnar hollow structure to form an exposed part;
assembling by means of a supporting jig to form an operating platform positioned above the poured columnar hollow structure, wherein the size of the formed operating platform is larger than that of the cross section of the columnar hollow structure;
providing a center-penetrating jack, sleeving the center-penetrating jack on the exposed part of the supporting rod and on the operating platform, fixedly connecting the center-penetrating jack with the operating platform, and fastening the operating platform on the supporting rod by tightly holding the supporting rod by the center-penetrating jack;
providing a hoisting structure, and fixedly arranging the hoisting structure at the bottom of the operating platform;
before a formwork structure of a poured columnar hollow structure is dismantled, the hoisting structure is connected with the formwork structure, and after the formwork structure is dismantled, the hoisting structure is used for hoisting the formwork structure upwards to a next construction section;
the center-penetrating jack is used for driving the operating platform to lift upwards along the exposed part of the supporting rod, and the operating platform is tightly held on the supporting rod through the center-penetrating jack after the operating platform is lifted in place so as to be fastened on the supporting rod;
and installing a formwork structure at the corresponding construction section, pouring concrete to form a columnar hollow structure, lengthening the supporting rod, and repeatedly hoisting the formwork structure and lifting the operating platform until the construction of the columnar hollow structure is finished.
7. The construction method according to claim 6, wherein after the assembly of the operation platform, further comprising:
a support frame is vertically arranged in the middle of the operating platform;
and a plurality of inclined struts are connected between the top of the supporting frame and the edge of the operating platform.
8. The construction method according to claim 7, further comprising:
connecting a hoisting mast on the support frame, arranging the hoisting mast in an inclined manner, and extending one end of the hoisting mast to the outer side of the operating platform to form an overhanging end;
a pulley is arranged at the overhanging end, a lifting rope is wound at the pulley, one end of the lifting rope is wound around the pulley and then is hung downwards, the end part of the lifting rope is connected with a lifting hook, and the other end of the lifting rope is connected with a power mechanism;
the lifting hook is used for hooking the component to be transported, the lifting rope is recovered through the power mechanism, and the component to be transported is lifted to the operating platform.
9. The construction method according to claim 6, further comprising:
providing a limiting piece, installing the limiting piece on the exposed part of the supporting rod in a manner of up-and-down movement adjustment, enabling the limiting piece to be arranged above the operating platform, and limiting the jacking range of the center-penetrating jack by using the limiting piece;
after the operating platform is lifted upwards, the operating platform moves upwards along the exposed part of the supporting rod to adjust the position of the limiting piece.
10. The construction method according to claim 6, wherein when the operation platform is assembled, the method further comprises:
and assembling the bottom of the operating platform corresponding to the position where the columnar hollow structure is arranged to form an outer side hanging rack and an inner side hanging rack, and forming a construction platform for cast-in-situ construction of the columnar hollow structure by utilizing the outer side hanging rack and the inner side hanging rack.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236709.1A CN112922326A (en) | 2021-03-03 | 2021-03-03 | Lightweight hydraulic reverse mold lifting system and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110236709.1A CN112922326A (en) | 2021-03-03 | 2021-03-03 | Lightweight hydraulic reverse mold lifting system and construction method thereof |
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| CN112922326A true CN112922326A (en) | 2021-06-08 |
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| SU1109061A3 (en) * | 1978-09-04 | 1984-08-15 | Джон Пауль Петтерссон (Швеци ) | Lift-progressive forms |
| CN103104091A (en) * | 2013-02-26 | 2013-05-15 | 中国建筑第八工程局有限公司 | Sliding mold whole lifting platform and construction method |
| CN104712143A (en) * | 2015-03-12 | 2015-06-17 | 山东电力建设第三工程公司 | Reversed mould construction method for circular reinforced concrete chimney wall |
| CN211286601U (en) * | 2019-10-17 | 2020-08-18 | 鞍山三冶建筑工程有限公司 | Chimney construction device applying hydraulic lifting and rollover technology |
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2021
- 2021-03-03 CN CN202110236709.1A patent/CN112922326A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1109061A3 (en) * | 1978-09-04 | 1984-08-15 | Джон Пауль Петтерссон (Швеци ) | Lift-progressive forms |
| CN103104091A (en) * | 2013-02-26 | 2013-05-15 | 中国建筑第八工程局有限公司 | Sliding mold whole lifting platform and construction method |
| CN104712143A (en) * | 2015-03-12 | 2015-06-17 | 山东电力建设第三工程公司 | Reversed mould construction method for circular reinforced concrete chimney wall |
| CN211286601U (en) * | 2019-10-17 | 2020-08-18 | 鞍山三冶建筑工程有限公司 | Chimney construction device applying hydraulic lifting and rollover technology |
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Application publication date: 20210608 |