CN113005914B - Construction method of special-shaped pier tower hydraulic creeping formwork conversion system - Google Patents
Construction method of special-shaped pier tower hydraulic creeping formwork conversion system Download PDFInfo
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- CN113005914B CN113005914B CN202110280613.5A CN202110280613A CN113005914B CN 113005914 B CN113005914 B CN 113005914B CN 202110280613 A CN202110280613 A CN 202110280613A CN 113005914 B CN113005914 B CN 113005914B
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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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- 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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Abstract
The invention relates to a construction method of a special-shaped pier tower hydraulic creeping formwork conversion system, which comprises the following steps: s1, hydraulic climbing formwork preparation and numbering; s2, pre-embedding an embedded part; s3, pouring foundation section concrete; s4, cleaning a climbing formwork platform; s5, dismantling the A1 surface upper shelf body to fall to the ground; s6, lifting the lower frame body A1'; s7, mounting and lifting the upper frame body B1B 1'; s8, mounting and lifting the lower frame body B2' by the upper frame body B2; s9, mounting and lifting the lower frame A2' by the upper frame A2; s10, mounting an upper frame body A1; s11, climbing construction along the bridge to the hydraulic climbing formwork; and S12, binding steel bars and pouring concrete. The invention has the beneficial effects that: the invention adopts a creeping formwork conversion system to circularly replace and disassemble at the variable cross section of the tower column to achieve the purpose of system conversion, only one surface of the upper frame body needs to be hung and removed to the ground, the lower frame body continues to be lifted and fixed, and the rest surfaces are circularly replaced and disassembled and installed by taking the lower frame bodies lifted one by one as the basis.
Description
Technical Field
The invention relates to a construction method of a hydraulic creeping formwork conversion system of a special-shaped pier tower, which is mainly suitable for the conversion construction of the hydraulic creeping formwork system of the special-shaped pier tower such as an A-shaped pier tower, an H-shaped pier tower, a Y-shaped pier tower and the like.
Background
With the deepening of the concepts of landscaping, landscaping and the like, bridges spanning V-shaped valleys in mountainous areas are often designed as cable-stayed bridges, and the structural forms of cable-stayed bridge pier towers are various, mainly including A-shaped, H-shaped, Y-shaped and the like. According to different pier tower structures, different pier tower intersection or tower beam consolidation positions and different construction processes, the pier tower or the tower beam can be constructed synchronously or asynchronously, and no matter what method is adopted for construction, when the pier tower intersection or the tower beam consolidation position is constructed, hydraulic creeping formwork needs to be constructed for system conversion.
The conversion of conventional systems is often that all support bodies on the hydraulic climbing formwork are dismantled by a manual fit tower crane, and the tower crane is hoisted to a site under a bridge to be subjected to angle adjustment and the like and then is hoisted and installed again, so that the method has the following problems: (1) the flexible rod piece and the template of the upper frame body are easy to deform. (2) The overhead operation risk of the operators who install the lower frame body is high, and the requirement on a stacking place is high. (3) The workload of re-assembling and disassembling the frame body is too large, the construction operation time is long, the efficiency is low, and the construction period is seriously influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a hydraulic creeping formwork conversion system for a special-shaped pier tower and a construction method, which improve the conversion and installation efficiency of the hydraulic creeping formwork system at the position of a bifurcation or a tower beam consolidation position of the special-shaped pier tower and reduce the deformation of a support and a template in the hoisting process.
The hydraulic creeping formwork conversion system for the special-shaped pier tower comprises an upper frame body, a formwork support structure, a main platform bearing connection structure, an auxiliary tower hydraulic sliding structure, a lower frame body, an upper frame body landing placement platform, a Y-shaped tower column and a tower column conversion foundation section; the Y-shaped tower column is provided with a tower column conversion base section at the bifurcation part, and the side edge of the tower column conversion base section is provided with an upper frame body, a supporting formwork structure, a main platform bearing and connecting structure, an auxiliary tower hydraulic sliding structure and a lower frame body; the upper frame body is hung on the upper frame body floor placing platform when the tower column is converted into the foundation section; the tower column conversion foundation section comprises a middle tower column conversion foundation section and an upper tower column conversion foundation section.
Preferably, the method comprises the following steps: the Y-shaped tower column begins to branch at a middle tower column section, the middle tower column conversion base section is a first tower column section base section, the upper tower column conversion base section is a first tower column section base section, and the cast-in-place box girder is positioned between the middle tower column conversion base section and the upper tower column conversion base section; before conversion of the climbing formwork system, the upper frame body and the formwork supporting structure are located on the upper portion of the main platform bearing connecting structure, the formwork supporting structure is arranged close to the tower column conversion base section, the tower-attached hydraulic sliding structure and the lower frame body are located on the lower portion of the main platform bearing connecting structure, the tower-attached hydraulic sliding structure is connected with the lower frame body, the tower-attached hydraulic sliding structure is arranged close to the tower column conversion base section, the upper frame bodies in the transverse bridge direction are respectively numbered as A1, A2, B1 and B2, the lower frame bodies in the transverse bridge direction are respectively numbered as A1 ', A2', B1 'and B2', the upper frame bodies in the bridge direction are respectively numbered as C1, C2, D1 and D2, and the lower frame bodies in the bridge direction are respectively numbered as C1 ', C2', D1 'and D2'.
Preferably, the method comprises the following steps: go up support body and main platform bearing connection structure and pass through connecting pin and be connected, support body and lower support body are gone up in the configuration of every side of Y type tower column.
Preferably, the method comprises the following steps: the floor-type shelving platform for the upper frame body comprises rubber blocks, wood plates and a cement cushion layer, wherein the cement cushion layer is poured on the ground, the wood plates are laid on the cement cushion layer, the rubber blocks are arranged on the wood plates, and four upper frame body vertical rods of the upper frame body are placed on the rubber blocks.
Preferably, the method comprises the following steps: the formwork supporting structure comprises a formwork diagonal brace, a formwork and a sliding platform, wherein the formwork diagonal brace is arranged between the formwork and the sliding platform.
Preferably, the method comprises the following steps: the tower-attached hydraulic sliding structure comprises a guide rail and a hydraulic driving device, and the hydraulic driving device is arranged at the top of the guide rail.
Preferably, the method comprises the following steps: the lower frame body comprises a tripod cross beam, a tripod diagonal strut, a tripod vertical rod, a pin shaft hinge, a middle platform, a hanging rod and a hanging platform, the tripod cross beam is connected with the tripod vertical rod through the pin shaft hinge, the tripod diagonal strut is arranged between the tripod cross beam and the tripod vertical rod, the middle platform is arranged on the lower portion of the tripod vertical rod, the hanging rod is arranged on the lower portion of the middle platform, and the hanging platform is arranged on the lower portion of the hanging rod.
Preferably, the method comprises the following steps: and the intersection of the cast-in-situ box girder and the Y-shaped tower column is a tower girder consolidation section.
Preferably, the method comprises the following steps: the inclination angle of the lower frame body is adapted to the inclination angle of the Y-shaped tower column after bifurcation.
The construction method of the special-shaped pier tower hydraulic creeping formwork conversion system comprises the following steps:
s1, hydraulic climbing formwork preparation and numbering: according to the section size of a lower tower column section of the Y-shaped tower column, a hydraulic climbing formwork conversion system is arranged on each side edge of the pier column, hydraulic climbing formworks on four surfaces of the Y-shaped tower column are numbered, upper frame bodies in the transverse bridge direction are respectively numbered as A1, A2, B1 and B2, lower frame bodies in the transverse bridge direction are respectively numbered as A1 ', A2', B1 'and B2', upper frame bodies in the bridge direction are respectively numbered as C1, C2D 1 and D2, and lower frame bodies in the bridge direction are respectively numbered as C1 ', C2', D1 'and D2';
s2, embedding an embedded part: when the lower tower column is constructed vertically upwards, embedded parts are arranged according to the designed size and the designed interval, the embedded parts in the same row are kept horizontal, and creeping formwork concrete pouring construction is carried out by adopting a traditional hydraulic creeping formwork mode; when the middle tower column section is constructed, because the tower column has an inclination angle, the corresponding inclination angle adjustment is carried out on the embedded parts in the same row along the bridge direction;
s3, pouring foundation section concrete: when the lower tower column is converted into the middle tower column, the first section of the middle tower column is used as a conversion foundation section of the middle tower column, and concrete of the conversion foundation section of the middle tower column is poured;
s4, cleaning a climbing formwork platform: removing all materials, equipment and a hydraulic system on the hydraulic climbing formwork conversion system, pulling a formwork through a formwork diagonal brace to separate the formwork from concrete, moving the whole formwork supporting structure backwards along a main platform bearing connection structure through a sliding platform, and installing an embedded part hanging seat on an embedded part of a middle tower column conversion base section;
s5, removing the shelf body on the A1 surface and landing: the construction of the upper frame body landing placement platform is completed on the ground in advance, the upper frame body is disassembled and assembled by adopting a manual cooperation tower crane four-point hoisting method, after the tower crane is stressed, the connecting pin between the upper frame body layer and the lower frame body layer is disassembled, and the transverse bridge is directly hoisted to the upper frame body A1 to land on the upper frame body landing placement platform;
s6, lifting the lower frame body A1': cleaning sundries and related connecting accessories on a middle platform, a suspender and a hanging platform of a lower frame body A1 ', integrally lifting the lower frame body A1 ' by adopting a tower crane, hanging the lower frame body A1 ' on an embedded part hanging seat which is installed on a middle tower column conversion base section, adjusting the angle of a tripod cross beam and a tripod upright rod of the lower frame body A1 ' through a tripod diagonal brace and a pin shaft hinge, linearly changing the lower frame body A1 ' along the middle tower column, and changing a rectangle formed by two groups of bearing tripods into a parallelogram;
s7, mounting and lifting B1' on the upper frame body B1: hoisting the transverse bridge to the upper frame body B1 by using a tower crane, installing the transverse bridge on the lifted lower frame body A1 ', and lifting the lower frame body B1 ', wherein the operation key points of the hoisting process are the same as that of the hoisting of the lower frame body A1 ';
s8, mounting and lifting the upper frame body B2 on the lower frame body B2': hoisting the transverse bridge upper frame body B2 by using a tower crane, installing the transverse bridge upper frame body B1 'on the lifted lower frame body B1', and lifting the lower frame body B2 ', wherein the operation key points of the lifting are the same as that of the lifting of the lower frame body A1';
s9, mounting and lifting the upper frame body A2 on the lower frame body A2': hoisting the transverse bridge upper frame body A2 by using a tower crane, installing the transverse bridge upper frame body on the lifted lower frame body B2 ', and lifting the lower frame body A2 ', wherein the operation key points of the lifting are the same as that of the lifting of the lower frame body A1 ';
s10, installing an upper frame body A1: hanging a transverse bridge upward upper frame body A1 on the landing platform of the upper frame body on the lifted lower frame body A2', and completing the climbing formwork system conversion of a bifurcation at the base section of the middle tower column conversion;
s11, climbing construction along the bridge direction hydraulic climbing formwork: after the conversion from the transverse bridge to the climbing formwork system at the middle tower column conversion foundation section is completed, the embedded part hanging seat, the guide rail and the hydraulic driving device are installed according to the inclination angle of the embedded part along the bridge direction, the guide rail is parallel to the axis of the middle tower column, and the hydraulic climbing formwork along the bridge direction C1, C2, D1 and D2 is carried out in a traditional hydraulic climbing formwork mode;
s12, binding steel bars and pouring concrete: after the hydraulic creeping formwork system at the middle tower column conversion foundation section is converted, binding the next section of steel bar, setting corresponding embedded parts, pouring concrete, driving the hydraulic creeping formwork system through a hydraulic driving device to perform normal hydraulic creeping formwork construction, and performing system conversion when the hydraulic creeping formwork system is constructed to the upper tower column conversion foundation section, wherein the system conversion mode is the same as that of the system at the middle tower column conversion foundation section.
The invention has the beneficial effects that:
(1) the invention is provided with the upper frame body landing placing platform, and can reduce the problems of deformation and the like caused by concentrated stress of the upright rods of the upper frame body when the creeping formwork system is converted.
(2) The climbing formwork conversion system is adopted at the variable cross section of the tower column for cyclic replacement and disassembly, the purpose of system conversion is achieved, only one surface of the upper frame body needs to be hung to the ground, the lower frame body continues to be lifted and fixed, the rest surfaces are circularly replaced and disassembled and installed by taking the lower frame bodies lifted one by one as a foundation, construction is simple and convenient, and the integrity of the climbing formwork body can be effectively guaranteed.
(3) The invention adopts a 'semi-floor type' system conversion construction method, and the whole process of operators is carried out on the creeping formwork platform, thereby effectively ensuring the safety, having small replacement and disassembly working strength in the whole construction process and improving the construction efficiency by 2 to 3 times.
Drawings
FIG. 1 is a schematic diagram of a hydraulic creeping-mold conversion system according to the present invention;
FIG. 2 is a schematic view of the formwork structure of the present invention;
FIG. 3 is a schematic view of the upper frame of the present invention;
FIG. 4 is a schematic view of the main platform load bearing connection of the present invention;
FIG. 5 is a schematic view of the tower-attached hydraulic sliding structure of the present invention;
FIG. 6 is a schematic view of the lower housing of the present invention;
FIG. 7 is a schematic view of the landing platform for the upper frame of the present invention;
FIG. 8 is a schematic view of a tower foundation section partition according to the present invention;
FIG. 9 is a front view of the lower tower column segment hydraulic climbing formwork system with numbers before conversion according to the present invention;
FIG. 10 is a numbering plan view of the lower tower column segment hydraulic climbing formwork system of the present invention before conversion;
11a-11f are schematic diagrams of the high altitude conversion construction process of the hydraulic creeping formwork conversion system of the present invention;
FIG. 12 is a schematic numbering view of the upper tower column foundation section hydraulic climbing formwork system after conversion according to the present invention;
FIG. 13 is a schematic view of the lower frame body of the present invention, in which the two supporting tripods form a graph which is changed from a rectangle to a parallelogram;
fig. 14 is a schematic diagram of the adaptive angle transformation of two bearing tripods of the lower frame body.
Description of reference numerals: 1, putting on a frame body; 2-a formwork structure; 3-main platform bearing connection structure; 4-attaching a tower hydraulic sliding structure; 5-lower frame body; 6-formwork diagonal bracing; 7-template; 8-a slipping platform; 9-erecting a pole on the upper frame body; 10-embedded parts; 11-a buried part hanging seat; 12-a guide rail; 13-hydraulic drive means; 14-tripod beams; 15-tripod diagonal bracing; 16-tripod upright stanchions; 17-hinge pin shaft; 18-a mid-platform; 19-a boom; 20-hanging the platform; 21-a rubber block; 22-wood board; 23-a cement cushion layer; 24-ground; 25-Y-shaped tower columns; 26-middle tower conversion foundation section; 27-casting box girder in situ; 28-upper tower conversion foundation section.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The concrete structure and climbing principle of the traditional hydraulic climbing formwork system, the technical requirements of screw connection, the angle adjusting principle and structure of a lower frame bearing tripod, the technical requirements of tower beam connection and construction, the technical requirements of tower crane hoisting, the concrete pouring construction quality standard and the like are not described in detail, and the structure implementation mode related to the invention is mainly explained.
Example one
As shown in fig. 1-6, the hydraulic climbing formwork conversion system structure diagram includes an upper frame body 1, a supporting formwork structure 2, a main platform bearing connection structure 3, a tower-attached hydraulic sliding structure 4, a lower frame body 5, a formwork diagonal strut 6, a formwork 7, a sliding platform 8, an embedded part 10, an embedded part hanging seat 11, a guide rail 12, a hydraulic driving device 13, a tripod cross beam 14, a tripod diagonal strut 15, a tripod upright rod 16, a pin hinge 17, a Y-shaped tower column 25, a middle tower column conversion base section 26, an upper tower column conversion base section 28, etc., the hydraulic climbing formwork conversion system mainly includes an upper frame body 1, a supporting formwork structure 2, a main platform bearing connection structure 3, a tower-attached hydraulic sliding structure 4 and a lower frame body 5, the hydraulic climbing formwork conversion system is substantially the same as the conventional hydraulic climbing formwork system structure, and has the difference that the universality of the upper and lower frame bodies of the hydraulic climbing formwork is fully utilized, the upper and lower frame bodies are circularly replaced and disassembled to achieve the purpose of system conversion. Go up support body 1 and main platform bearing connection structure 3 and adopt the connecting pin to connect, Y type tower post 25 disposes general hydraulic climbing formwork's last support body 1 and lower support body 5 according to each side of section size.
As shown in fig. 7, the upper frame body floor standing platform schematic diagram includes an upper frame body upright rod 9, rubber blocks 21, wood plates 22, cement cushion layers 23, a ground 24 and the like, the upper frame body 1 is hung on the upper frame body floor standing platform by a tower crane when a tower column is converted into a foundation section, the upper frame body floor standing platform is formed by pouring a2 cm-thick cement cushion layer 23 on the ground 24, the wood plates 22 are laid on the cement cushion layer 23, the rubber blocks 21 are arranged on the wood plates 22 according to the designed size and position, and the four upper frame body upright rods 9 of the upper frame body 1 are placed on the rubber blocks 21.
As shown in fig. 8, the tower column foundation section partition schematic diagram includes an upper frame body 1, a lower frame body 5, a Y-shaped tower column 25, a middle tower column conversion foundation section 26, a cast-in-place box beam 27, an upper tower column conversion foundation section 28, and the like, where the Y-shaped tower column 25 begins to branch when being constructed to the middle tower column section, the hydraulic climbing formwork conversion system needs to be replaced and disassembled at the middle tower column first section conversion foundation section 26 and the upper tower column first section conversion foundation section 28, and the upper frame body 1 is replaced and disassembled, and the lower frame body 5 is lifted to perform system conversion construction. The conversion foundation section is a first section foundation section 26 of the middle tower column section, and conversion is only needed to be performed once at the middle tower column conversion foundation section 26 within the length range of the whole middle tower column section. The intersection of the box girder 27 and the Y-shaped tower column 25 is a tower girder consolidation section, and the tower girder consolidation section adopts layered formwork pouring construction for the tower column without adopting a hydraulic creeping formwork conversion system for construction. The upper tower column conversion base section 28 is the first tower column section base section, and only one hydraulic climbing formwork system conversion is needed to be carried out at the upper tower column conversion base section 28 in the whole upper tower column section range. The system conversion method at the upper tower column conversion base section 28 is the same as the system conversion method at the middle tower column conversion base section 26.
As shown in fig. 9-10, the numbering schematic diagram before conversion of the lower tower column segment hydraulic climbing formwork system includes an upper frame body 1 and a lower frame body 5, the hydraulic climbing formworks on four surfaces of the Y-shaped tower column 25 are numbered, the upper frame body 1 in the transverse bridge direction before conversion of the climbing formwork system is respectively numbered as a1, a2, B1 and B2, the lower frame body 5 in the transverse bridge direction is respectively numbered as a1 ', a 2', B1 'and B2', the upper frame body 1 in the forward bridge direction is respectively numbered as C1, C2, D1 and D2, and the lower frame body 5 in the forward bridge direction is respectively numbered as C1 ', C2', D1 'and D2'.
As shown in fig. 11-12, the hydraulic creeping formwork conversion system high altitude conversion construction process is schematically illustrated, and the conversion system has the following operation key points:
(a) and performing system conversion at the middle tower column conversion base section 26, hanging the upper frame body A1 in the transverse bridge direction on the upper frame body landing placing platform, lifting the lower frame body A1 ', and hanging the upper frame body B1 in the opposite transverse bridge direction on the lifted lower frame body A1'.
(b) The lower frame body B1 'with the transverse bridge direction is lifted, and the upper frame body B2 with the transverse bridge direction is hung on the lifted lower frame body B1'.
(c) The lower frame body B2 'with the transverse bridge direction is lifted, and the upper frame body A2 with the transverse bridge direction is hung on the lifted lower frame body B2'.
(d) And lifting the lower frame body A2 'with the transverse bridge direction, and hanging the upper frame body A1 with the transverse bridge direction on the resting platform on the lifted lower frame body A2', so as to complete the system conversion of the fork at the middle tower column conversion base section 26. (as shown in fig. 12).
(e) The forward-bridge upper frame bodies C1, C2, D1 and D2, the lower frame bodies C1 ', C2', D1 'and D2' do not need system conversion, and only the tripod cross beams 14 and the tripod diagonal braces 15 of the lower frame body 5 need to be adjusted according to the angle of inclination of the Y-shaped tower column 25 after bifurcation so as to be adaptive to the angle of inclination of the tower column, and then the traditional normal hydraulic climbing can be carried out.
Example two
The patent also provides a construction method of the hydraulic creeping formwork conversion system, which comprises the following steps:
(1) the universality of the hydraulic creeping formwork is equipped and numbered: a universal hydraulic climbing formwork conversion system is arranged on each side edge of the pier tower according to the section size of a lower tower column section of the Y-shaped tower column 25, hydraulic climbing formworks on four surfaces of the Y-shaped tower column 25 are numbered, upper frame bodies 1 in the transverse bridge direction are respectively numbered A1, A2, B1 and B2, lower frame bodies 5 in the transverse bridge direction are respectively numbered A1 ', A2', B1 'and B2', upper frame bodies 1 in the forward bridge direction are respectively numbered C1, C2, D1 and D2, and lower frame bodies 5 in the forward bridge direction are respectively numbered C1 ', C2', D1 'and D2'.
(2) Pre-burying of an embedded part: when the lower tower column is constructed vertically upwards, the embedded parts 10 are arranged according to the designed size and the designed interval, the embedded parts 10 in the same row keep horizontal, and normal creeping formwork concrete pouring construction is carried out by adopting a traditional hydraulic creeping formwork mode. When the middle tower column section is constructed, because the inclination angle of the tower column is 84 degrees, the corresponding inclination angle adjustment is carried out on the embedded parts 10 in the same row along the bridge direction, and the embedded parts 10 are not kept horizontal any more.
(3) Pouring concrete of the foundation sections: when the lower tower column is converted into the middle tower column, the hydraulic climbing formwork conversion system needs one foundation section for system conversion, the first section of the middle tower column section is used as the middle tower column conversion foundation section 26, and concrete of the middle tower column conversion foundation section 26 is poured.
(4) Cleaning a creeping formwork platform: all materials, equipment and hydraulic systems on the hydraulic climbing formwork conversion system are removed, the formwork 7 is pulled through the formwork inclined strut 6, the formwork 7 is separated from concrete, the whole formwork supporting structure 2 moves backwards (rightwards in the drawing) along the main platform bearing connection structure 3 through the sliding platform 8, and the embedded part hanging seat 11 is installed on the embedded part 10 of the middle tower column conversion base section 26.
(5) The shelf body on the A1 surface is removed to be grounded: the construction of placing the platform on the ground by falling to the ground with the upper frame body is completed in advance, the upper frame body 1 is disassembled by adopting a manual-fit tower crane four-point hoisting method, the connecting pins between the upper frame body layer and the lower frame body layer are disassembled after the tower crane is slightly stressed, and the transverse bridge is directly hoisted to the upper frame body A1 to fall to the ground on the upper frame body placing platform.
(6) Lifting the lower frame body A1': the method comprises the steps of cleaning sundries and related connecting accessories on a middle platform 18, a suspender 19 and a hanging platform 20 of a lower frame body A1 ', integrally lifting the lower frame body A1 ' by adopting a tower crane, hanging the lower frame body A1 ' on an embedded part hanging seat 11 which is installed on a middle tower conversion base section 26, adjusting the angle of a tripod cross beam 14 and a tripod upright rod 16 of the lower frame body A1 ' through a tripod inclined strut 15 and a pin shaft hinge 17, linearly changing the lower frame body A1 ' along a middle tower, and changing a rectangle formed by two groups of bearing tripods into a parallelogram. (shown in FIGS. 13-14)
(7) The upper frame body B1 is mounted and lifted B1': the opposite transverse bridge is lifted to the upper frame body B1 by using a tower crane, is arranged on the lifted lower frame body A1 ', and lifts the lower frame body B1 ', and the operation key points of the lifting method are the same as that of the lifting lower frame body A1 '.
(8) The upper frame body B2 is used for installing and lifting the lower frame body B2': the transverse bridge is lifted to the upper frame body B2 by using a tower crane, and is installed on the lifted lower frame body B1 ', and the lower frame body B2' is lifted, and the operation key points of the lifting lower frame body A1 'are the same as those of the lifting lower frame body A1'.
(9) The upper frame body A2 is used for installing and lifting the lower frame body A2': a tower crane is used for hoisting the transverse bridge upper frame body A2, the transverse bridge upper frame body is installed on the lifted lower frame body B2 ', the lifted lower frame body A2' is lifted, and the operation key points of the lifting lower frame body A1 'are the same as those of the lifted lower frame body A1'.
(10) The installation of upper bracket body A1: and (3) hanging the transverse bridge upward frame body A1 on the laying platform on the lifted lower frame body A2', and completing the creeping formwork system conversion of the bifurcation at the middle tower column conversion base section 26.
(11) Climbing construction along the bridge direction by using a hydraulic climbing formwork: after the conversion from the transverse bridge to the climbing formwork system at the middle tower column conversion base section 26 is completed, the embedded part hanging seat 11, the guide rail 12 and the hydraulic driving device 13 are installed according to the inclination angle of the embedded part 10 along the bridge direction, the guide rail 12 is parallel to the axis of the middle tower column, and the normal hydraulic climbing formwork along the bridge direction C1, C2, D1 and D2 is carried out by adopting the traditional hydraulic climbing formwork mode without system conversion.
(12) Binding steel bars and pouring concrete: after the conversion of the hydraulic creeping formwork system at the middle tower column conversion foundation section 26 is completed, the next section of steel bar is bound, the corresponding embedded part 10 is arranged, concrete is poured, the hydraulic creeping formwork system is driven by the hydraulic driving device 13 to carry out normal hydraulic creeping formwork construction, when the construction is carried out to the upper tower column conversion foundation section 28, the system conversion is needed, and the system conversion mode is the same as the system conversion at the middle tower column conversion foundation section 26.
Claims (1)
1. A construction method of a special-shaped pier tower hydraulic creeping formwork conversion system is characterized by comprising the following steps:
s1, hydraulic climbing formwork preparation and numbering: according to the section size of a lower tower column section of a Y-shaped tower column (25), a hydraulic climbing formwork conversion system is arranged on each side of the pier tower, hydraulic climbing formwork on four surfaces of the Y-shaped tower column (25) is numbered, upper frame bodies (1) in the transverse bridge direction are respectively numbered as A1, A2, B1 and B2, lower frame bodies (5) in the transverse bridge direction are respectively numbered as A1 ', A2', B1 'and B2', upper frame bodies (1) in the forward bridge direction are respectively numbered as C1, C2D 1 and D2, and lower frame bodies (5) in the forward bridge direction are respectively numbered as C1 ', C2', D1 'and D2';
s2, embedding an embedded part: when the lower tower column is constructed vertically upwards, embedded parts (10) are arranged according to the designed size and the designed interval, the embedded parts (10) in the same row are kept horizontal, and the creeping formwork concrete pouring construction is carried out by adopting a traditional hydraulic creeping formwork mode; when the middle tower column section is constructed, because the tower column has an inclination angle, the corresponding inclination angle adjustment is carried out along the bridge direction on the embedded parts (10) in the same row;
s3, pouring foundation section concrete: when the lower tower column is converted into the middle tower column, the first section of the middle tower column is used as a conversion foundation section (26) of the middle tower column, and concrete of the conversion foundation section (26) of the middle tower column is poured;
s4, cleaning a climbing formwork platform: removing all materials, equipment and a hydraulic system on the hydraulic climbing formwork conversion system, pulling a formwork (7) through a formwork diagonal brace (6) to separate the formwork (7) from concrete, moving the whole formwork supporting structure (2) backwards along a main platform bearing connection structure (3) through a sliding platform (8), and installing an embedded part hanging seat (11) on an embedded part (10) of a middle tower column conversion base section (26);
s5, removing the shelf body on the A1 surface and landing: the construction of the upper frame body landing placement platform is completed on the ground in advance, the upper frame body (1) is disassembled and assembled by adopting a manual cooperation tower crane four-point hoisting method, after the tower crane is stressed, the connecting pin between the upper frame body layer and the lower frame body layer is disassembled, and the transverse bridge is directly hoisted to the upper frame body A1 to land on the upper frame body landing placement platform;
s6, lifting the lower frame body A1': impurities and related connecting accessories on a middle platform (18), a suspender (19) and a hanging platform (20) of a lower frame body A1 'are cleaned, the lower frame body A1' is integrally lifted by a tower crane and hung on an embedded part hanging seat (11) which is installed on a middle tower column conversion base section (26), a tripod cross beam (14) and a tripod upright pole (16) of the lower frame body A1 'adjust angles through a tripod inclined strut (15) and a pin shaft hinge (17), the lower frame body A1' linearly changes along the middle tower column, and a rectangle formed by two groups of bearing tripods is changed into a parallelogram;
s7, mounting and lifting the upper frame body B1B 1': hoisting the transverse bridge upper frame body B1 by using a tower crane, installing the transverse bridge upper frame body B1 on the lifted lower frame body A1 ', and lifting the lower frame body B1 ', wherein the operation key points of the lifting are the same as that of the lifting of the lower frame body A1 ';
s8, mounting and lifting the upper frame body B2 on the lower frame body B2': hoisting the transverse bridge upper frame body B2 by using a tower crane, installing the transverse bridge upper frame body B1 'on the lifted lower frame body B1', and lifting the lower frame body B2 ', wherein the operation key points of the lifting are the same as that of the lifting of the lower frame body A1';
s9, mounting and lifting the upper frame body A2 on the lower frame body A2': hoisting the transverse bridge upper frame body A2 by using a tower crane, installing the transverse bridge upper frame body on the lifted lower frame body B2 ', and lifting the lower frame body A2 ', wherein the operation key points of the lifting are the same as that of the lifting of the lower frame body A1 ';
s10, installing an upper frame body A1: a transverse bridge-up upper frame body A1 on the upper frame body landing platform is hung on the lifted lower frame body A2', and the creeping formwork system conversion of a fork opening at the middle tower column conversion base section (26) is completed;
s11, climbing construction along the bridge direction hydraulic climbing formwork: after the conversion from a transverse bridge to a climbing formwork system at a middle tower column conversion base section (26) is completed, mounting of an embedded part hanging seat (11), a guide rail (12) and a hydraulic driving device (13) is carried out according to the inclination angle of an embedded part (10) along the bridge direction, wherein the guide rail (12) is parallel to the axis of the middle tower column, and hydraulic climbing formwork along the bridge direction in C1, C2, D1 and D2 is carried out in a traditional hydraulic climbing formwork mode;
s12, binding steel bars and pouring concrete: after the conversion of the hydraulic creeping formwork system at the middle tower column conversion foundation section (26) is completed, the next section of steel bar is bound, corresponding embedded parts (10) are arranged, concrete is poured, the hydraulic creeping formwork system is driven by a hydraulic driving device (13) to carry out normal hydraulic creeping formwork construction, when the hydraulic creeping formwork system is constructed at the upper tower column conversion foundation section (28), the system conversion is carried out, and the system conversion mode is the same as that of the system conversion at the middle tower column conversion foundation section (26).
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| CN103306208A (en) * | 2013-07-05 | 2013-09-18 | 中南大学 | Formwork creeping method for novel 1.6 parabola-shaped four-column type hollow variable section high pier |
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| CN110387824A (en) * | 2019-07-12 | 2019-10-29 | 中交第二航务工程局有限公司 | A kind of Sarasota creeping formwork becomes rail construction method in the air |
| CN111119060A (en) * | 2020-01-07 | 2020-05-08 | 烟建集团有限公司 | Coastal environment high pier hydraulic self-creeping formwork construction method |
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| JPH10212820A (en) * | 1997-01-30 | 1998-08-11 | Kawatetsu Kizai Kogyo Kk | Temporary working platform rising method |
| CN103306208A (en) * | 2013-07-05 | 2013-09-18 | 中南大学 | Formwork creeping method for novel 1.6 parabola-shaped four-column type hollow variable section high pier |
| CN205653708U (en) * | 2016-05-20 | 2016-10-19 | 中交第四航务工程局有限公司 | Work platform that inclined plane climbed follows |
| CN110387824A (en) * | 2019-07-12 | 2019-10-29 | 中交第二航务工程局有限公司 | A kind of Sarasota creeping formwork becomes rail construction method in the air |
| CN111119060A (en) * | 2020-01-07 | 2020-05-08 | 烟建集团有限公司 | Coastal environment high pier hydraulic self-creeping formwork construction method |
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