CN112176885A - High hollow pier group formwork turnover rapid construction method for viaduct bridge - Google Patents
High hollow pier group formwork turnover rapid construction method for viaduct bridge Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 238000009415 formwork Methods 0.000 title description 30
- 230000007306 turnover Effects 0.000 title description 5
- 238000007789 sealing Methods 0.000 claims description 32
- 239000004567 concrete Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 238000005192 partition Methods 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 11
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 241000196324 Embryophyta Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 239000003433 contraceptive agent Substances 0.000 description 2
- 230000002254 contraceptive effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of hollow pier group turning over moulds, in particular to a high hollow pier group turning over mould for an viaduct, which comprises a tripod, wherein a template is arranged on one side of the tripod, a clamping column and a cross column are connected between the tripod and the template, the part of a frame plate of the tripod protrudes into the clamping column, the cross column is arranged on one side of the clamping column in a matching manner, and a clamping block is arranged on the side surface of the cross column. The pier body reinforcing steel bar manufacturing method has the advantages that the original material reinforcing steel bar (9m or 12m) can be directly stripped to be installed after ribs are removed, the workload of processing a large amount of working reinforcing steel bars is reduced, the pier body reinforcing steel bar manufacturing method can be used as a construction platform for installing the hollow pier inner curtain, the construction progress is accelerated, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of hollow pier group rollover, in particular to a rapid construction method for a viaduct high hollow pier group rollover.
Background
The increasingly crowded roads lead the urban demand for rail traffic to be more and more urgent, and in order to ensure that a rail main line meets the requirement of a vertical curve index, the elevated bridge section has irreplaceable functions and positions in rail traffic construction, particularly in cities with complex landforms and landforms. In recent years, the construction of rail transit is increasing in all big cities in the country. In the face of the region with complex terrain, the viaduct pier body is higher and higher. And the viaduct is influenced by the main line vertical curve, and the viaduct bodies usually appear in pieces. The construction scheme, quality, safety control and mechanical equipment configuration requirements on the viaduct body group are higher in the construction process, and according to the resource configuration condition, the viaduct sections are usually constructed in a flowing mode, and the viaduct body construction is usually directly related to the key construction period. Therefore, the reasonable, economic and efficient construction scheme of the viaduct pier body is the key of success and failure of the project, and the method for quickly constructing the viaduct high hollow pier group through turnover formwork is provided for the project.
Disclosure of Invention
The invention aims to provide a method for quickly constructing a viaduct hollow pier group through rollover, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a formwork overturning device for a viaduct high hollow pier group comprises a tripod, a formwork is arranged on one side of the tripod, a clamping column and a cross column are connected between the tripod and the formwork, a framework plate of the tripod partially protrudes into the clamping column, a through hole is formed in the clamping column, an L-shaped rod-shaped hook penetrates through the through hole of the clamping column, the hook penetrates through the through hole formed in the tripod, the cross column is arranged on one side of the clamping column in a matching mode, a clamping block is arranged on the side surface of the cross column, one end of the clamping block is fixedly connected with a first spring, the clamping block and the first spring are arranged in a square groove formed in the outer wall of the cross column, an air column penetrates through the middle of the first spring, one end of the air column is fixedly connected with the clamping block, one end of the cross column extends into a square plate groove formed in the formwork, the clamping block partially protrudes into a clamping groove formed in the inner wall of the square plate groove of the formwork, an L-shaped pipe cavity and a straight, one side intercommunication of straight lumen has L type lumen, and the one end of L type lumen extends to the tripod outside, be provided with the pneumatic valve in the L type lumen, the other end of gas column extends to in the straight lumen, and gas column tip fixedly connected with bellows, the one end fixedly connected with location section of thick bamboo of bellows.
Preferably, the air valve comprises a partition plate, a second spring, a sealing ball and a sealing barrel, the partition plate and the sealing barrel are fixed on the inner wall of the L-shaped pipe cavity, the second spring and the sealing ball are arranged between the partition plate and the sealing barrel, one end of the second spring is in contact with the sealing ball, and the other end of the second spring is in contact with the partition plate.
Preferably, the baffle shape is the plectane and the plate body is fitted with a contraceptive ring and is equipped with a plurality of evenly distributed's through-hole, and the spherical groove has been seted up on the spherical groove of the sealed tube shape for drum and barrel on one side bottom surface, agrees with in the spherical groove of sealed tube and is provided with the sealed ball, and sealed tube is fitted with a contraceptive ring and is equipped with a plurality of evenly distributed's pore.
Preferably, the gas column is cylindrical, a plurality of uniformly distributed protruding sliding blocks are arranged on the upper fixing ring of the side wall of the column body, the gas column and the corrugated pipe are movably sleeved in the inner cavity of the straight pipe cavity, and the protruding sliding blocks partially extend into prismatic sliding grooves formed in the inner wall of the straight pipe cavity.
Preferably, the positioning cylinder is fixed on the inner wall of the straight tube cavity, one end of the first spring is in contact with the bottom surface of the square groove on the transverse column, and the other end of the first spring abuts against the clamping block.
The method for quickly constructing the viaduct elevated hollow pier group by overturning the formwork comprises the following steps:
the method comprises the following steps: binding a first section of steel bar, a template and a pull rod by using a tower crane or a truck crane, pouring concrete, installing a second section of steel bar after the strength of the concrete meets the requirement, and roughening the section of concrete;
step two: keeping one section of the template on the top surface still, releasing a pull rod between the lower three sections of the templates, lifting the pull rod by a tower crane, moving the pull rod backwards, and lifting the template to the position of concrete to be poured;
step three: after the three sections of templates are in place, the corresponding templates are connected by a pull rod, adjusted to the accurate positions and fixed;
step four: and (4) pouring pier body concrete by pumping (pouring 4.5m each time), maintaining after pouring is finished, installing the next section of steel bar after the concrete strength meets the requirement, and repeating the second step and the third step until the construction of the pier body is finished.
Step five: after the inner support is assembled in the processing plant, the inner support is hoisted to the designated position of the pier body through a tower crane, and the inner support can be temporarily connected with the large back rib of the inner mold to be used as a support;
step six: after the inner support is installed, the inner support is utilized to start to erect the pier body main ribs, and the pier body main ribs can be positioned on the reinforcement binding support at the upper part of the inner support;
step seven: and (3) after the main reinforcement frame is erected, the lower pier body stirrups are installed, and after the pier body stirrups at the stage are completed, the inner support can be lifted by using the tower crane and next circulation is carried out.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the combined steel mould and configures the standard flat mould and the 1/2 vertex angle mould, thereby increasing the utilization rate of the template and ensuring the appearance quality of the concrete; the internal mold adopts a standard flat mold, an angle mold and a telescopic strap to supplement a wood mold, and the internal mold template achieves the optimal configuration; the pier body reinforcing steel bar manufacturing is good, the raw material reinforcing steel bar (9m or 12m) can be directly stripped to be installed, a large amount of working reinforcing steel bar processing workload is reduced, the construction platform can be used as a construction platform for installing the hollow pier inner curtain, the construction progress is accelerated, and the cost is saved;
2. the invention adopts the climbing cone as the pre-embedding of the pump pipe support, thereby not only reducing the pre-embedding difficulty, but also being capable of being used repeatedly, and being beneficial to the engineering cost control. The standardized safety protection platform and the template are divided into blocks and are simultaneously installed and dismantled, so that the construction safety is guaranteed, and the workload of repeatedly installing the safety protection railings is reduced. The hollow pier top solid section support is replaced by the prefabricated reinforced concrete cover plate, the main structure concrete is utilized to the maximum extent, meanwhile, the prefabricated parts are convenient to install and disassemble, the field operation is utilized, and the construction period is shortened.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a cross-post structure;
fig. 3 is a schematic view of a clamp post structure.
In the figure: the device comprises a tripod 1, a template 2, a clamping column 3, a cross column 4, a hook 5, a clamping block 6, a first spring 7, an air column 8, a tube cavity 9L, a straight tube cavity 10, an air valve 11, a corrugated tube 12, a positioning tube 13, a partition plate 14, a second spring 15, a sealing ball 16, a sealing tube 17, a pier wall 18, an inner support 19 and a pull rod 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the technical solutions of the present invention belong to the protection scope of the present invention.
Referring to fig. 1 to 3, the present invention provides a technical solution: a formwork overturning device for a viaduct high hollow pier group comprises a tripod 1, a formwork 2 is arranged on one side of the tripod 1, a clamping column 3 and a cross column 4 are connected between the tripod 1 and the formwork 2, a frame plate part of the tripod 1 protrudes into the clamping column 3, a through hole is formed in the clamping column 3, an L-shaped rod-shaped hook 5 penetrates through the through hole of the clamping column 3, the hook 5 penetrates through the through hole formed in the tripod 1, the cross column 4 is arranged on one side of the clamping column 3 in a matching manner, a clamping block 6 is arranged on the side surface of the cross column 4, one end of the clamping block 6 is fixedly connected with a spring I7, the clamping block 6 and the spring I7 are arranged in a square groove formed in the outer wall of the cross column 4, an air column 8 penetrates through the middle of the spring I7, one end of the air column 8 is fixedly connected with the clamping block 6, one end of the cross column 4 extends into the square groove formed in the formwork 2, and the part of the clamping, open L type pipe chamber 9 and straight tube chamber 10 in the spreader 4, the square groove bottom surface on the tip of straight tube chamber 10 and the spreader 4 is connected, one side intercommunication of straight tube chamber 10 has L type pipe chamber 9, and L type pipe chamber 9's one end extends to tripod 1 outside, is provided with pneumatic valve 11 in the L type pipe chamber 9, and the other end of gas column 8 extends to in the straight tube chamber 10, and 8 tip fixedly connected with bellows 12 of gas column, the one end fixedly connected with location section of thick bamboo 13 of bellows 12.
The air valve 11 comprises a partition plate 14, a second spring 15, a sealing ball 16 and a sealing cylinder 17, the partition plate 14 and the sealing cylinder 17 are fixed on the inner wall of the L-shaped pipe cavity 9, the second spring 15 and the sealing ball 16 are arranged between the partition plate 14 and the sealing cylinder 17, one end of the second spring 15 is in contact with the sealing ball 16, and the other end of the second spring 15 is in contact with the partition plate 14.
The partition plate 14 is in a circular plate shape, a plurality of uniformly distributed through holes are annularly arranged on the plate body, the sealing cylinder 17 is in a cylinder shape, a spherical groove is formed in the bottom surface of one side of the cylinder body, a sealing ball 16 is arranged in the spherical groove of the sealing cylinder 17 in a matching mode, and a plurality of uniformly distributed fine holes are annularly arranged on the sealing cylinder 17.
The gas column 8 is cylindrical, a plurality of uniformly distributed convex sliding blocks are arranged on the upper fixing ring of the side wall of the column body, the gas column 8 and the corrugated pipe 12 are movably sleeved in the inner cavity of the straight pipe cavity 10, and the convex sliding blocks partially extend into prismatic sliding grooves formed in the inner wall of the straight pipe cavity 10.
The positioning cylinder 13 is fixed on the inner wall of the straight tube cavity 10, one end of the first spring 7 is contacted with the bottom surface of the square groove on the cross column 4, and the other end of the first spring 7 is propped against the fixture block 6.
The method for quickly constructing the viaduct elevated hollow pier group by overturning the formwork comprises the following steps:
the method comprises the following steps: binding a first section of steel bar, a template and a pull rod by using a tower crane or a truck crane, pouring concrete, installing a second section of steel bar after the strength of the concrete meets the requirement, and roughening the section of concrete;
step two: keeping one section of the template on the top surface still, releasing a pull rod between the lower three sections of the templates, lifting the pull rod by a tower crane, moving the pull rod backwards, and lifting the template to the position of concrete to be poured;
step three: after the three sections of templates are in place, the corresponding templates are connected by a pull rod, adjusted to the accurate positions and fixed;
step four: and (4) pouring pier body concrete by pumping (pouring 4.5m each time), maintaining after pouring is finished, installing the next section of steel bar after the concrete strength meets the requirement, and repeating the second step and the third step until the construction of the pier body is finished.
Step five: after the inner support is assembled in the processing plant, the inner support is hoisted to the designated position of the pier body through a tower crane, and the inner support can be temporarily connected with the large back rib of the inner mold to be used as a support;
step six: after the inner support is installed, the inner support is utilized to start to erect the pier body main ribs, and the pier body main ribs can be positioned on the reinforcement binding support at the upper part of the inner support;
step seven: and (3) after the main reinforcement frame is erected, the lower pier body stirrups are installed, and after the pier body stirrups at the stage are completed, the inner support can be lifted by using the tower crane and next circulation is carried out.
The turnover installation process flow comprises the following steps: construction preparation → positioning and paying-off → ground pre-splicing → checking the quality of the templates and pre-splicing installation → erecting the outer corner mold of the first layer → erecting the outer flat mold of the first layer → erecting the outer safe operation platform of the outer mold → erecting the inner flat mold of the first layer → installing the split screw rod → erecting the inner corner mold of the first layer → erecting the inner safe operation platform of the inner mold → erecting the outer corner mold of the second layer → installing the inner and outer templates according to the method → completing the installation of the top template of the section → installing the split screw rod → erecting the inner and outer safe operation platforms of the top layer of the section.
The turnover mould dismantling and turning up process flow comprises the following steps: removing a lowermost layer of outer corner formwork pull rod and an adjacent formwork bolt → hoisting a lowermost layer of corner formwork to the position of the outer corner formwork of the top layer of the concrete pouring section by using hoisting equipment such as a tower crane and the like → removing the lowermost layer of outer flat formwork pull rod and the adjacent formwork bolt → hoisting to the top layer and assembling with the outer corner formwork → removing the lowermost layer of inner flat formwork pull rod and the adjacent formwork bolt → hoisting to the position of the inner flat formwork of the top layer by using hoisting equipment such as a tower crane and the like → removing the lowermost layer of inner corner formwork pull rod and the adjacent formwork bolt → hoisting to the top layer and assembling with the inner flat formwork → installing a newly assembled formwork split screw → erecting an inner and outer safety operation protection platform, and repeating the steps to sequentially turn up and assemble the lower layer formwork until the upper layer of upper section and the top layer formwork are all turned up and installed.
The working principle is as follows: the cross column 4 is inserted into the template 2, the spring I7 rebounds to push the clamping block 6 to protrude from the cross column 4, the clamping and fixing between the cross column 4 and the template 2 are realized, a worker uses a gas injection device in the prior art to perform gas extraction operation on the L-shaped pipe cavity 9, namely, the air in the corrugated pipe 12 can be pumped out through the L-shaped pipe cavity 9 and the straight pipe cavity 10, the air flow in the process jacks up the sealing ball 16, then quickly passes through the gap between the sealing ball 16 and the sealing cylinder 17, the air pressure suction acts on the air column 8, the air column 8 moves to drive the clamping block 6, namely, the fixture block 6 can be controlled to retract into the cross column 4, and the fixture block 6 extends out of the cross column 4 again, the process is slow, because the air flow in the L-shaped pipe cavity 9 can only permeate through the fine holes on the sealing cylinder 17 in the process of flowing to the straight pipe cavity 10, certain time is needed, and the butt joint work of the tripod 1 and the template 2 is completed in the time.
The height division of the bridge construction sections can be conveniently positioned by 4.5m or 6m according to the length of the main reinforcement raw material, the main difficulty of high-altitude center pier reinforcement binding lies in positioning and installation of vertical reinforcements, the construction method is inspired by the traditional process, the stiff skeleton is optimized into a reusable inner support, namely after the vertical reinforcements are positioned and installed, a part of horizontal stirrups are installed, and the inner support is hung and removed by utilizing hoisting equipment and used for the next section. The vertical main reinforcement can be bound according to 9m and 12m blanking by adopting the inner support, so that the construction process is greatly optimized, and the construction progress is accelerated.
The external mold is configured by adopting a combined steel mold, in order to ensure the appearance quality, the number of the blocks of the template is reduced as much as possible, and meanwhile, the field installation is convenient, and the requirements of four-side slope shrinkage are met by adopting a large flat mold and a gradual change angle mold. Considering that the pier body is high in height, in order to reduce the types of angle molds and facilitate field construction, the angle molds are only configured to half of the pier body and are adjusted by utilizing the flat molds. The template utilization rate can be increased.
The requirement on the appearance quality of the inner mold is not high, and the construction method adopts a standard flat mold, a standard angle mold, a telescopic back rib and a wood mold to fill to ensure that the inner cavity has the linear requirement of a structural form of four-side slope shrinkage.
The concrete pouring mainly needs to optimize the fixing mode of the pump pipe, the method mainly adopts the form of a vehicle-mounted pump and the pump pipe to pump concrete, the positioning of the pump pipe adopts the climbing cone as pre-embedding, the supporting cushion block is made of a steel structure, the stability of the pump pipe is guaranteed, meanwhile, main components can be used reversely, and compared with the traditional fixing mode, the cost is saved.
The temporary measures of the high hollow pier mainly comprise construction temporary measures of a diaphragm plate and a pier top capping section, the construction method utilizes the reinforced concrete with a main structure as much as possible, and a reinforced concrete cover plate with the strength equal to that of the concrete after 15cm is manufactured by a prefabricating method and used as a supporting measure for pouring the concrete on the reinforced concrete cover plate, so that the construction method has the advantages of convenience in construction, construction period saving, no need of dismantling and the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Viaduct high hollow mound crowd turns over mould, including tripod (1), one side of tripod (1) is provided with template (2), its characterized in that: a clamping column (3) and a cross column (4) are connected between the tripod (1) and the template (2), the frame plate part of the tripod (1) protrudes into the clamping column (3), a through hole is formed in the clamping column (3), an L-shaped rod-shaped hook (5) penetrates through the through hole of the clamping column (3), the hook (5) penetrates through the through hole formed in the tripod (1), the cross column (4) is arranged on one side of the clamping column (3) in a matching manner, a clamping block (6) is arranged on the side surface of the cross column (4), one end of the clamping block (6) is fixedly connected with a first spring (7), the clamping block (6) and the first spring (7) are arranged in a square groove formed in the outer wall of the cross column (4), an air column (8) penetrates through the middle part of the first spring (7), one end of the air column (8) is fixedly connected with the clamping block (6), one end of the cross column (4) extends into a square plate groove formed in the template (2), in the draw-in groove of seting up on the square plate inslot wall of fixture block (6) part protrusion template (2), seted up L type lumen (9) and straight tube chamber (10) in spreader (4), the tip of straight tube chamber (10) is connected with the square tank bottom surface on spreader (4), and one side intercommunication of straight tube chamber (10) has L type lumen (9), and the one end of L type lumen (9) extends to tripod (1) outside, be provided with pneumatic valve (11) in L type lumen (9), the other end of gas column (8) extends to in straight tube chamber (10), and gas column (8) tip fixedly connected with bellows (12), the one end fixedly connected with location section of thick bamboo (13) of bellows (12).
2. The overhead viaduct pier group rollover as claimed in claim 1, wherein: the air valve (11) comprises a partition plate (14), a second spring (15), a sealing ball (16) and a sealing barrel (17), the partition plate (14) and the sealing barrel (17) are fixed on the inner wall of the L-shaped pipe cavity (9), the second spring (15) and the sealing ball (16) are arranged between the partition plate (14) and the sealing barrel (17), the sealing ball (16) is contacted with one end of the second spring (15), and the partition plate (14) is contacted with the other end of the second spring (15).
3. The overhead viaduct pier group rollover as claimed in claim 2, wherein: the partition plate (14) is in a circular plate shape, the plate body is provided with a plurality of uniformly distributed through holes in an annular mode, the sealing barrel (17) is in a cylindrical shape, the bottom surface of one side of the barrel body is provided with a spherical groove, sealing balls (16) are arranged in the spherical groove of the sealing barrel (17) in a matched mode, and the sealing barrel (17) is provided with a plurality of uniformly distributed fine holes in an annular mode.
4. The overhead viaduct pier group rollover as claimed in claim 1, wherein: gas post (8) are cylindric and cylinder lateral wall upper fixed ring is equipped with a plurality of evenly distributed's protrusion slider, and gas post (8) and bellows (12) activity cup joint in the inner chamber of straight lumen (10), and protrusion slider part extends to in the prismatic spout of seting up on the inner wall of straight lumen (10).
5. The overhead viaduct pier group rollover as claimed in claim 1, wherein: the positioning cylinder (13) is fixed on the inner wall of the straight tube cavity (10), one end of the first spring (7) is in contact with the bottom surface of the square groove on the transverse column (4), and the other end of the first spring (7) is pressed against the clamping block (6).
6. The viaduct pier group rollover rapid construction method according to claim 1, comprising the steps of:
the method comprises the following steps: binding a first section of steel bar, a template and a pull rod by using a tower crane or a truck crane, pouring concrete, installing a second section of steel bar after the strength of the concrete meets the requirement, and roughening the section of concrete;
step two: keeping one section of the template on the top surface still, releasing a pull rod between the lower three sections of the templates, lifting the pull rod by a tower crane, moving the pull rod backwards, and lifting the template to the position of concrete to be poured;
step three: after the three sections of templates are in place, the corresponding templates are connected by a pull rod, adjusted to the accurate positions and fixed;
step four: and (4) pouring pier body concrete by pumping (pouring 4.5m each time), maintaining after pouring is finished, installing the next section of steel bar after the concrete strength meets the requirement, and repeating the second step and the third step until the construction of the pier body is finished.
Step five: after the inner support is assembled in the processing plant, the inner support is hoisted to the designated position of the pier body through a tower crane, and the inner support can be temporarily connected with the large back rib of the inner mold to be used as a support;
step six: after the inner support is installed, the inner support is utilized to start to erect the pier body main ribs, and the pier body main ribs can be positioned on the reinforcement binding support at the upper part of the inner support;
step seven: and (3) after the main reinforcement frame is erected, the lower pier body stirrups are installed, and after the pier body stirrups at the stage are completed, the inner support can be lifted by using the tower crane and next circulation is carried out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011188080.XA CN112176885A (en) | 2020-10-30 | 2020-10-30 | High hollow pier group formwork turnover rapid construction method for viaduct bridge |
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| CN202011188080.XA CN112176885A (en) | 2020-10-30 | 2020-10-30 | High hollow pier group formwork turnover rapid construction method for viaduct bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114232480A (en) * | 2021-10-30 | 2022-03-25 | 山东高速工程建设集团有限公司 | High hollow pier group formwork turnover rapid construction method for viaduct bridge |
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| CN114232480A (en) * | 2021-10-30 | 2022-03-25 | 山东高速工程建设集团有限公司 | High hollow pier group formwork turnover rapid construction method for viaduct bridge |
| CN114232480B (en) * | 2021-10-30 | 2024-05-03 | 山东高速工程建设集团有限公司 | Quick construction method for turning over mould of bridge group of viaduct Gao Kongxin |
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