CN112942107A - Hydraulic creeping formwork construction process in cable tower construction process - Google Patents
Hydraulic creeping formwork construction process in cable tower construction process Download PDFInfo
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- CN112942107A CN112942107A CN202110043986.0A CN202110043986A CN112942107A CN 112942107 A CN112942107 A CN 112942107A CN 202110043986 A CN202110043986 A CN 202110043986A CN 112942107 A CN112942107 A CN 112942107A
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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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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Abstract
The invention discloses a hydraulic creeping formwork construction process in a cable tower construction process, wherein a cable tower is a door-type cable tower, and tower columns on two sides are divided into sections from bottom to top in advance, and the hydraulic creeping formwork construction process comprises the following steps: s1: when the 1 st section of tower column section is constructed from bottom to top, a hydraulic climbing formwork template is not used, and a formwork is automatically erected on site to carry out pouring construction; s2: when the section 2 of the tower column is constructed, a tripod and an upper frame body erecting template are used for pouring construction; s3: when the 3 rd section of tower column is constructed, a climbing frame body and a guide rail of the whole hydraulic climbing formwork are installed, and a formwork is erected for pouring construction; s4: and (4) the 4 th tower column segment and all the tower column segments above the 4 th tower column segment are subjected to normal circulating climbing through a hydraulic climbing formwork to perform pouring construction. The invention provides an improved hydraulic creeping formwork construction process aiming at the special cable tower structure, and the improved hydraulic creeping formwork construction process is simple in construction, high in efficiency and high in quality.
Description
Technical Field
The invention relates to the technical field of hydraulic creeping formwork construction in cable tower construction. More particularly, the invention relates to a hydraulic creeping formwork construction process in a cable tower construction process.
Background
The hydraulic creeping formwork has the following characteristics: 1) the whole climbing can be realized, a single-frame climbing can be realized, and the climbing stability is good, 2) the operation is convenient, the safety is high, and a large amount of working hours and materials can be saved; 3) after the formwork climbing frame is assembled at one time, the formwork climbing frame cannot fall to the ground all the time, so that the construction site is saved, and the damage of templates, particularly panels, caused by collision is reduced; 4) the hydraulic climbing process is stable, synchronous and safe; 5) an omnibearing operating platform is provided, and a construction unit does not need to waste materials and labor force for setting up the operating platform again; 6) the structure construction error is small, the deviation correction is simple, and the construction error can be eliminated layer by layer; 7) the climbing speed is high, and the construction speed of the project can be improved; 8) the templates are self-climbed, and are cleaned in situ, so that the hoisting frequency of the tower crane is greatly reduced.
In the construction of bridge towers, hydraulic creeping formwork is generally used, and is a relatively mature technology. However, the object to be constructed of the hydraulic creeping formwork is the cable tower structure specially designed in the project, and the conventional hydraulic creeping formwork construction process cannot meet the requirement of direct application construction.
Disclosure of Invention
The invention aims to provide a hydraulic creeping formwork construction process in a cable tower construction process, and provides an improved hydraulic creeping formwork construction process aiming at a special cable tower structure of the application, which has the advantages of simple construction, high efficiency and high quality.
In order to achieve these objects and other advantages according to the present invention, there is provided a hydraulic climbing formwork construction process in a cable tower construction process, wherein the cable tower is a gate-type cable tower, the tower columns on both sides are divided into sections from bottom to top in advance, the tower columns are integrally divided into three parts, namely a lower tower column, a middle tower column and an upper tower column, the inner sides of the tower columns are all vertical surfaces, the outer sides of the tower columns are inclined surfaces inclined from bottom to top towards the inner sides, and the joints of the lower tower column and the middle tower column as well as the middle tower column and the upper tower column are all provided with variable cross sections formed by steps up and down, the process comprising the steps of:
s1: when the 1 st section of tower column section from bottom to top is constructed, a hydraulic climbing formwork template is not used, and a formwork is automatically erected on site to carry out pouring construction;
s2: when the section 2 of the tower column is constructed, a tripod and an upper frame body supporting template of a hydraulic creeping formwork are used for pouring construction;
s3: when the 3 rd section of tower column is constructed, a climbing frame body and a guide rail of the whole hydraulic climbing formwork are installed, and a formwork is erected for pouring construction;
s4: and (4) the 4 th tower column segment and all the tower column segments above the 4 th tower column segment are subjected to normal circulating climbing through a hydraulic climbing formwork to perform pouring construction.
Preferably, one of the circulation flows of the normal climbing of the hydraulic climbing formwork in the step S4 specifically includes the following steps: a: after the template is installed, closing the die and pouring concrete; b: after the concrete pouring is finished, binding a layer of steel bars; c: after the strength of the concrete reaches the design requirement, withdrawing the formwork, namely moving the formwork backwards, and installing the embedded part and the wall-attached hanging seat; d: lifting the guide rail, and disassembling the embedded part of the hanging platform for reverse use; e: lifting the climbing frame body, and installing a template and an embedded part system; f: and (5) closing the die, pouring concrete and climbing again for circulation.
Preferably, the climbing frame body arrangement mode of the hydraulic climbing formwork is as follows: 3 lower frame bodies and 4 upper frame bodies are arranged in the longitudinal bridge direction, when construction is carried out and pouring is carried out on the middle tower column, 2 lower frame bodies and 4 upper frame bodies are changed, and climbing tracks climb to the top of the tower and are not adjusted; 3 lower frame bodies, 4 upper frame bodies, 2 lower frame bodies and 4 upper frame bodies are arranged on the outer side of the transverse bridge, and the transverse bridge climbs to the top of the tower without adjustment.
Preferably, in the step S4 of normal cycle climbing of the hydraulic climbing formwork, the specific construction process of passing through the steps of the lower tower column and the middle tower column and the steps of the middle tower column and the upper tower column is as follows:
a: pouring a first section of tower column segment at the variable cross section of the construction step, marking as a 12 th section of tower column segment, hoisting the template only after pouring is finished and certain strength is set, and keeping the climbing frame body still;
b: after the 12 th tower column section is poured and reaches the design strength, the template is moved backwards through the lifting mechanism, namely the template is removed, a first bracket and a wall-attached supporting cushion block are embedded in the 12 th tower column section in sequence, the angle of the guide rail is adjusted according to the inclined plane of the tower column, the guide rail is lifted, the climbing frame body is lifted after the guide rail is adjusted, and the 13 th tower column section is subjected to concrete die assembly and pouring;
c: after the concrete pouring of the 13 th section of tower column segment is finished and the design strength is reached, moving the template backwards through the lifting mechanism, pre-burying a second bracket, a wall-attached supporting cushion block and a guide rail tail supporting cushion block on the 13 th section of tower column segment, adjusting the angle of the guide rail according to the inclined plane of the tower column and lifting the guide rail;
d: after the guide rail is adjusted, lifting the climbing frame body, and carrying out die assembly and pouring on the section of the 14 th tower column;
e: after the concrete pouring of the 14 th section of tower column segment is finished and the design strength is reached, moving the template backwards through the lifting mechanism, pre-burying a third bracket, a wall-attached supporting cushion block and a guide rail tail supporting cushion block on the 14 th section of tower column segment, adjusting the angle of the guide rail according to the inclined plane of the tower column and lifting the guide rail;
f: adjusting the angle of the guide rail, lifting the guide rail, and performing die assembly and pouring on the section of the 15 th tower column;
g: after the 15 th tower column section concrete is poured and reaches the design strength, the template is moved backwards through the lifting mechanism, the angle of the guide rail is adjusted according to the inclined plane of the tower column, and the climbing frame body is lifted after the guide rail is lifted;
h: adjusting the angle of the guide rail to an initial angle state, then normally pouring concrete of the section 16 of the tower column to the variable cross section of the next step, and recycling to the step A;
the sizes of the first bracket, the second bracket and the third bracket are reduced in sequence.
Preferably, the formworks in the hydraulic formwork construction process are wood beam formworks, two formworks of the outer formworks are fixed in size, and the sizes of the other formworks are cut and cut along with the change of the height of the tower column.
Preferably, the lifting mechanism is of a chain type structure, the lower end of the chain is provided with a lifting hook, the lifting mechanism is provided with a pair of lifting hooks corresponding to two sides of the template and arranged on the climbing frame body, the template comprises a panel, a vertical rib and a transverse rib, one side surface of the panel is the inner side surface of poured concrete, the other side surface of the panel is the outer side surface, the vertical rib is provided with a plurality of lifting rings and is fixed on the outer side surface of the panel at a vertical interval, a pair of lifting rings are fixed at the upper ends of the vertical ribs at two sides and matched with the lifting hooks of the lifting mechanism to be detachable and fixed, the transverse rib is provided with a plurality of lifting rings and is fixed on the vertical rib at a transverse interval, the vertical rib and the transverse rib are made of i-steel, a pair of auxiliary mechanisms is arranged at the positions of the lower part of the template corresponding, the other end of the lifting rope is hinged with the lower part of the template and the climbing frame body respectively, one end of the pulling rope is fixed on the connecting piece, the other end of the pulling rope is fixedly connected to the chain, the backward moving template is realized by upwards driving the template to integrally move upwards and backwards through the lifting mechanism, and in an initial state, the pulling rope is tightened, and the chain is in a downward bending state.
Preferably, a through hole is formed in a web plate of the I-shaped steel of the transverse rib, a circular ring is fixed to the other end of one of the hinge rods, the circular ring penetrates through the through hole and is sleeved with the through hole and can freely rotate in the through hole, the connecting piece is of a soft wear-resistant sheet structure, two ends of the connecting piece are respectively connected to the pair of hinge rods in a fixed connection mode, the pull rope is a flat ribbon-shaped rope, and the pull rope penetrates through the connecting piece from the lower portion of the connecting piece and is sleeved with the connecting piece to fix two end portions.
The invention at least comprises the following beneficial effects:
the construction that this application hydraulic creeping formwork is directed is the construction of the cable tower column of this application, and the cable tower is gate-type cable tower, divide into upper, middle and lower three big festival section, has the step between the adjacent festival section for the variable cross section, and the cable tower side still is the inclined plane of slope, and the hydraulic creeping formwork of this application mainly is that the step department to the variable cross section has given a concrete construction technology, and the work progress is simple high-efficient, and construction quality is high, satisfies the complete shaping construction of cable tower column completely.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a pylon according to the present invention;
FIG. 2 is a climbing track and climbing frame layout elevation view of the hydraulic climbing formwork of the present invention;
FIG. 3 is a formwork supporting state diagram of the first section of tower column section in hydraulic creeping formwork construction according to the present invention;
FIG. 4 is a formwork supporting state diagram of the 2 nd tower column segment in hydraulic creeping formwork construction according to the present invention;
FIG. 5 is a formwork supporting state diagram of the 3 rd section of tower column section in hydraulic creeping formwork construction according to the present invention;
FIG. 6 is a schematic plan view of a hydraulic climbing formwork of the present invention;
FIG. 7 is a first flowchart of the present invention for climbing a mold to pass through a step;
FIG. 8 is a second flowchart of the present invention for climbing a mold to pass a step;
FIG. 9 is a third flowchart of the process of climbing a formwork over a step according to the present invention;
FIG. 10 is a fourth flowchart of the present invention for climbing a formwork to pass a step;
FIG. 11 is a fifth flowchart of the present invention for climbing a formwork to pass a step;
FIG. 12 is a sixth flowchart of the present invention for climbing a formwork to pass a step;
FIG. 13 is a seventh flowchart illustrating the process of climbing a formwork to pass a step according to the present invention;
FIG. 14 is a flow chart of the present invention for climbing a formwork to pass a step eight;
FIG. 15 is a schematic structural view of a template of the present invention;
fig. 16 is an elevational view of the lifting mechanism and form in cooperation with the present invention.
Description of reference numerals:
1. the concrete support comprises a tower column, 2, a cross beam, 3, a concrete buttress, 4, a climbing track line, 5, a climbing frame body, 6, a first bracket, 7, a wall-attached supporting cushion block, 8, a template, 9, a lifting mechanism, 10, a guide rail, 11, a second bracket, 12, a guide rail tail supporting cushion block, 13, a third bracket, 14, a panel, 15, a vertical rib, 16, a transverse rib, 17, a lifting ring, 18, a chain, 19, a pull rope, 20, a hinge rod, 21 and a connecting piece.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Fig. 1 shows the overall structure of a cable tower, which is a portal structure and is connected by an upper cross beam 2, and a lower cross beam in the conventional structure is replaced by two inner concrete buttresses 3. The tower columns 1 on two sides are divided into sections from bottom to top in advance, the whole tower column 1 is divided into a lower tower column, a middle tower column and an upper tower column, the inner sides of the tower columns 1 are all vertical surfaces, the outer sides of the tower columns 1 are inclined surfaces which incline from bottom to top towards the inner sides, steps are arranged at the joints of the lower tower column, the middle tower column and the upper tower column, and the joints of the middle tower column and the upper tower column are provided with variable cross sections which are formed up and down, a tower column section division schematic diagram is shown in figure 2 and is divided into 20 sections totally, the 1 st to 11 th tower columns are the lower tower columns, the 12 th to 17 th tower columns are the middle tower columns, and.
The hydraulic creeping formwork construction process specifically comprises the following steps:
s1: when the 1 st section of tower column section from bottom to top is constructed, a hydraulic climbing formwork template is not used, and a formwork is automatically erected on site for pouring construction, as shown in fig. 3;
s2: when the 2 nd section of tower column section is constructed, a tripod and an upper frame body supporting template of a hydraulic creeping formwork are used for pouring construction, as shown in fig. 4;
s3: when the 3 rd section of tower column segment is constructed, the climbing frame body 5 and the guide rail 10 of the whole hydraulic climbing formwork are installed, and a formwork is erected for pouring construction, as shown in fig. 5;
s4: and (4) the 4 th tower column segment and all the tower column segments above the 4 th tower column segment are subjected to normal circulating climbing through a hydraulic climbing formwork to perform pouring construction.
The hydraulic climbing formwork used by the cable tower is of an LG-100 type, mainly comprises a template system, a support system, an embedded part system and a hydraulic system, and is of a conventional hydraulic climbing formwork structure.
1. Template system: the standard pouring height is 4.5 m, the height is in the vertical direction, in order to prevent pouring leakage, the template is wrapped by 100mm in each pouring, and double faced adhesive tapes are stuck between the top edge of the constructed structure and the template; in order to prevent concrete from overflowing from the upper end of the formwork and influencing the effect of the indirect seam pouring in each time, the upper overhang of the formwork is 50mm, and therefore the actual design height of the formwork is 4.65 m. According to specific construction conditions, the local pouring height can be adjusted.
And (3) adjusting an outer die: as shown in fig. 6, the MB1 and MB5 templates are fixed in size and are not adjusted; the remaining template sizes vary with height, so the size of each section of template needs to be adjusted.
One of the advantages of the wooden I-beam template system is that the cutting is convenient, and after the template is removed, according to the structural change, the cutting line is firstly placed on the template and then the template can be cut on the climbing formwork platform on site.
2. A bracket system: the device mainly comprises a bearing tripod, a backward moving part, a middle platform, a hanging platform, a wall-attached bearing device, a wall-attached support, a guide rail and an upper truss. The guide rail is a climbing rail of the whole climbing formwork system and is formed by assembling and welding steel plates, the distance between the ladder shelves is 300mm, and the material Q345B is used for transmitting load to the guide rail by the upper reversing box and the lower reversing box and further transmitting the load to the embedded part system.
As shown in fig. 2, the climbing frame 5 of the hydraulic climbing formwork is arranged in the following manner: 3 lower frame bodies and 4 upper frame bodies are arranged in the longitudinal bridge direction, when construction is carried out and poured to the middle tower column, 2 frame bodies are adopted, and a climbing track line 4 climbs to the tower top and is not adjusted; 3 lower frame bodies, 4 upper frame bodies, 2 lower frame bodies and 4 upper frame bodies are arranged on the outer side of the transverse bridge, and the transverse bridge climbs to the top of the tower without adjustment.
3. An embedded part system: the high-strength concrete combined wall body mainly comprises an embedded part plate, a high-strength screw rod, a stressed bolt, a gasket and a climbing cone, wherein the stressed bolt, the gasket and the climbing cone can be used in a turnover mode.
And mounting the embedded part, fixing the climbing cone on the template by using a stressed bolt, smearing butter in the climbing cone hole, and screwing up the high-strength screw rod to ensure that concrete cannot flow into the climbing cone thread. The embedded plate is screwed at the other end of the high-strength screw rod. The cone faces the template and is opposite to the creeping cone. And if the embedded part collides with the steel bar, carrying out die assembly after the steel bar is properly displaced.
4. A hydraulic system: the hydraulic control system mainly comprises a hydraulic pump station control console, a hydraulic oil cylinder, a synchronous valve, a hydraulic rubber pipe, a hydraulic valve and a power distribution device.
5. The main performance indexes of the creeping formwork are as follows:
the name and the model number are as follows: HCB-100 type hydraulic self-climbing formwork;
the support body supports the span: less than or equal to 5 meters (distance between adjacent embedded parts points);
the height of the frame body is as follows: 15.5 meters (excluding the guide rails);
the width of the frame body is as follows: the upper platform is 2.7 meters, the middle platform is 1.5 meters, the main platform is 2.7 meters, the hydraulic operating platform is 2.7 meters, and the hanging platform is 1.9 meters;
the number of working layers and the construction load are as follows: upper platform is less than or equal to 3KN/m2The sub-platform is less than or equal to 0.75KN/m2The main platform is less than or equal to 1.5KN/m2The hydraulic operating platform is less than or equal to 1.5KN/m2And the hanging platform is less than or equal to 0.75KN/m2。
A climbing mechanism: the climbing mechanism is provided with a locking mechanism with automatic guiding, hydraulic lifting and automatic resetting, and can realize the function of mutual climbing of the frame body and the guide rail.
6. Climbing process:
after concrete pouring is finished → the form removal is moved backwards → the embedded part attaching device is installed → the lifting guide rail → the climbing frame → the steel bar is bound → the template is cleaned by the brush releasing agent → the embedded part is fixed on the template → the mold is closed → concrete is poured.
The method specifically comprises the following steps: a: after the template is installed, closing the die and pouring concrete; b: after the concrete pouring is finished, binding a layer of steel bars; c: after the strength of the concrete reaches the design requirement, withdrawing the formwork, namely moving the formwork backwards, and installing the embedded part and the wall-attached hanging seat; d: lifting the guide rail, and disassembling the embedded part of the hanging platform for reverse use; e: lifting the climbing frame body, and installing a template and an embedded part system; f: and (5) closing the die, pouring concrete and climbing again for circulation.
Lifting the guide rail, and adjusting the reversing devices in the upper reversing box and the lower reversing box to be upward simultaneously. The upper end of the reversing device props against the guide rail. When climbing the frame body, the upper reversing box and the lower reversing box are adjusted to be downward at the same time, and the lower end of the box props against the guide rail. (the hydraulic control console for climbing or lifting the guide rail is operated by a special person, each frame is provided with the special person to watch whether the guide rail is synchronous or not, the guide rail is asynchronous when the control is found, and the control is carried out by an adjustable hydraulic valve). The wall attaching device and the climbing cone are 3 sets, 2 sets are pressed under the guide rail, and 1 set is in turnover.
7. And (3) climbing a mould to pass through steps:
the concrete construction process of the hydraulic creeping formwork for passing the steps at the steps of the lower tower column, the middle tower column and the upper tower column is as follows (the steps between the lower tower column and the middle tower column are taken as an example for explanation):
A. pouring a 12 th tower column segment (after the concrete strength reaches 15MPA, only hoisting the template 8 to complete pouring, and keeping the climbing frame body 5 still), as shown in FIG. 7;
B. after the 12 th section of concrete is poured and the strength requirement is met, moving the template 8 backwards through the lifting mechanism 9, namely withdrawing the template, pre-burying a first bracket 6, namely a 35cm bracket, a wall supporting cushion block 7 and other members according to the position indicated by the graph 8, adjusting the angle of the guide rail 10, lifting the guide rail 10, adjusting the guide rail 10, then lifting the climbing frame body 5, and closing the mold and pouring the 13 th section of concrete;
c: after the 13 th section of concrete is poured and meets the strength requirement, the template 8 is moved backwards through the lifting mechanism 9, a second bracket 11, namely a 20cm bracket, a wall-attached supporting cushion block 7, a guide rail tail supporting cushion block 12 and other components are pre-embedded according to the position indicated by the graph 9, the angle of the guide rail 10 is adjusted, and the guide rail 10 is lifted;
d: after the guide rail 10 is adjusted, the climbing frame body 5 is lifted, and the 14 th section of concrete is subjected to mold closing and pouring, as shown in fig. 10;
e: after the 14 th section of concrete is poured and meets the strength requirement, the template 8 is moved backwards through the lifting mechanism 9, a third bracket 13, namely a bracket of 10cm, a wall-attached supporting cushion block 7, a guide rail tail supporting cushion block 12 and other components are pre-embedded according to the position indicated by the figure 11, the angle of the guide rail 10 is adjusted, and the guide rail 10 is lifted;
f: after the guide rail 10 is adjusted, the climbing frame body 5 is lifted, and the 15 th section of concrete is subjected to mold closing and pouring, as shown in fig. 12;
g: after the 15 th section of concrete is poured and meets the strength requirement, the template 8 is moved backwards through the lifting mechanism 9, the angle of the guide rail 10 is adjusted, and the climbing frame body 5 is lifted after the guide rail 10 is lifted, as shown in fig. 13;
h: adjusting the angle of the guide rail 10 to the initial angle state, then normally pouring the 16 th section of concrete to the next variable cross section, and recycling to the step A, as shown in fig. 14.
In the above-mentioned climbing formwork crosses step flow, through hoist mechanism 9 rethread template 8, design rack on the present common design for the top drawing of patterns coaster, set up the gear on the drawing of patterns girder in the below, thereby drive gear through the motor and then drive drawing of patterns coaster seesaw and drive template 8 seesaw and realize ann mould and drawing of patterns, this kind of drawing of patterns mode needs great drive power, the drawing of patterns in-process produces the gear easily moreover and collapses the bad problem. Therefore, the present application realizes a new demolding mode through another cooperation of the lifting knot mechanism and the template 8.
As shown in fig. 15 and 16, the lifting mechanism 9 is a chain 18 type structure and the lower end of the chain 18 is provided with a hook, the lifting mechanism 9 is provided with a pair of hooks corresponding to two sides of the formwork 8 and is arranged on the climbing frame body, the formwork 8 includes a panel 14, vertical ribs 15 and transverse ribs 16, one side surface of the panel 14 is an inner side surface of the poured concrete, the other side surface of the panel 14 is an outer side surface, the vertical ribs 15 are provided with a plurality of vertical ribs and are fixed on the outer side surface of the panel 14 at vertical intervals, a pair of hanging rings 17 are fixed on the upper ends of the vertical ribs 15 at two sides and are matched and detachably fixed with the hooks of the lifting mechanism 9, the transverse ribs 16 are provided with a plurality of horizontal ribs and are fixed on the vertical ribs 15 at horizontal intervals, the vertical ribs 15 and the transverse ribs 16 are i-shaped steel, a pair of auxiliary mechanisms are arranged at positions corresponding to the pair of hanging rings, one end of each of a pair of hinge rods 20 is hinged to one end of a connecting piece 21, the other end of each of the hinge rods is hinged to the lower portion of the formwork 8 and the climbing frame body, one end of a pull rope 19 is fixed to the connecting piece 21, the other end of the pull rope 19 is fixedly connected to a chain 18, the formwork 8 is moved backwards by driving the whole formwork 8 upwards through a lifting mechanism 9, the pull rope 19 is tightened in an initial state, and the chain 18 is bent downwards.
In the above technical solution, as shown in fig. 15, which is a schematic structural view of the form panel 8, a pair of pull rings are provided at the upper end for connecting with the chain 18 hooks of the lifting mechanism 9, as shown in fig. 16, which is an initial state view of the form panel 8 before being demolded, the chain 18 is pulled by the pull rope 19 to bend downward, and the pair of hinge rods 20 and the connecting member 21 are horizontal and do not rotate. When the mould is withdrawn, the lifting mechanism 9 is started, the chain 18 is lifted upwards, the pull rope 19 is pulled upwards, the pull rope 19 is fixed on the connecting piece 21 correspondingly, the pair of hinge rods 20 are pulled to rotate upwards by pulling the connecting piece 21, the climbing frame body is not movable at the moment, the template 8 can only move backwards along with the hinge rods 20, the pull rope 19 moves upwards, the upper end of the chain 18 also applies pulling force to the upper part of the template 8 through the lifting hook, and therefore the template 8 moves backwards and is withdrawn through up-down matching.
The web of the I-steel of the transverse rib 16 is provided with a through hole, the other end of one of the hinge rods 20 is fixed with a circular ring which passes through the through hole and is sleeved with the through hole and can freely rotate in the through hole, the connecting piece 21 is of a soft wear-resistant sheet structure, the two ends of the connecting piece 21 are respectively connected to the pair of hinge rods 20, the pull rope 19 is a flat belt-shaped rope and passes through the lower part of the connecting piece 21 and is sleeved with the pull rope, and then the two ends of the pull rope are fixed on the chain 18.
In above-mentioned technical scheme, the articulated between articulated rod 20 and template 8 is realized through the ring, but the ring passes free rotation behind the through-hole, articulated rod 20 takes place to rotate the back, the ring can carry out free slip and pulling template 8 backward upwards according to articulated rod 20's action and position, stay cord 19 and connecting piece 21 all set up to soft flat band-shaped structure for area of contact between them increases, the effort of having avoided mutual contact is too big, cause the loss of connecting piece 21 and stay cord 19.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. The utility model provides a hydraulic pressure creeping formwork construction process in cable tower work progress, the cable tower is door-type cable tower, the pylon of both sides carries out in advance and divides from supreme festival section down, the pylon is whole to be divided into down the pylon, well pylon and last pylon triplex, the inboard of pylon is the perpendicular, the outside is for following supreme inclined plane towards the inboard slope and all having the variable cross section about the step formation in the linking department of pylon and well pylon and last pylon down, a serial communication port, include following step:
s1: when the 1 st section of tower column section from bottom to top is constructed, a hydraulic climbing formwork template is not used, and a formwork is automatically erected on site to carry out pouring construction;
s2: when the section 2 of the tower column is constructed, a tripod and an upper frame body supporting template of a hydraulic creeping formwork are used for pouring construction;
s3: when the 3 rd section of tower column is constructed, a climbing frame body and a guide rail of the whole hydraulic climbing formwork are installed, and a formwork is erected for pouring construction;
s4: and (4) the 4 th tower column segment and all the tower column segments above the 4 th tower column segment are subjected to normal circulating climbing through a hydraulic climbing formwork to perform pouring construction.
2. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 1, wherein one of the circulation flows of the normal climbing of the hydraulic climbing formwork in the step S4 specifically comprises the following steps: a: after the template is installed, closing the die and pouring concrete; b: after the concrete pouring is finished, binding a layer of steel bars; c: after the strength of the concrete reaches the design requirement, withdrawing the formwork, namely moving the formwork backwards, and installing the embedded part and the wall-attached hanging seat; d: lifting the guide rail, and disassembling the embedded part of the hanging platform for reverse use; e: lifting the climbing frame body, and installing a template and an embedded part system; f: and (5) closing the die, pouring concrete and climbing again for circulation.
3. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 1, wherein the climbing frame body of the hydraulic climbing formwork is arranged in a manner that: 3 lower frame bodies and 4 upper frame bodies are arranged in the longitudinal bridge direction, when construction is carried out and pouring is carried out on the middle tower column, 2 lower frame bodies and 4 upper frame bodies are changed, and climbing tracks climb to the top of the tower and are not adjusted; 3 lower frame bodies, 4 upper frame bodies, 2 lower frame bodies and 4 upper frame bodies are arranged on the outer side of the transverse bridge, and the transverse bridge climbs to the top of the tower without adjustment.
4. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 1, wherein in the step S4 of normal circular climbing of the hydraulic climbing formwork, the specific construction flow of passing the steps at the steps of the lower tower column and the middle tower column and the steps of the middle tower column and the upper tower column is as follows:
a: pouring a first section of tower column segment at the variable cross section of the construction step, marking as a 12 th section of tower column segment, hoisting the template only after pouring is finished and certain strength is set, and keeping the climbing frame body still;
b: after the 12 th tower column section is poured and reaches the design strength, the template is moved backwards through the lifting mechanism, namely the template is removed, a first bracket and a wall-attached supporting cushion block are embedded in the 12 th tower column section in sequence, the angle of the guide rail is adjusted according to the inclined plane of the tower column, the guide rail is lifted, the climbing frame body is lifted after the guide rail is adjusted, and the 13 th tower column section is subjected to concrete die assembly and pouring;
c: after the concrete pouring of the 13 th section of tower column segment is finished and the design strength is reached, moving the template backwards through the lifting mechanism, pre-burying a second bracket, a wall-attached supporting cushion block and a guide rail tail supporting cushion block on the 13 th section of tower column segment, adjusting the angle of the guide rail according to the inclined plane of the tower column and lifting the guide rail;
d: after the guide rail is adjusted, lifting the climbing frame body, and carrying out die assembly and pouring on the section of the 14 th tower column;
e: after the concrete pouring of the 14 th section of tower column segment is finished and the design strength is reached, moving the template backwards through the lifting mechanism, pre-burying a third bracket, a wall-attached supporting cushion block and a guide rail tail supporting cushion block on the 14 th section of tower column segment, adjusting the angle of the guide rail according to the inclined plane of the tower column and lifting the guide rail;
f: adjusting the angle of the guide rail, lifting the guide rail, and performing die assembly and pouring on the section of the 15 th tower column;
g: after the 15 th tower column section concrete is poured and reaches the design strength, the template is moved backwards through the lifting mechanism, the angle of the guide rail is adjusted according to the inclined plane of the tower column, and the climbing frame body is lifted after the guide rail is lifted;
h: adjusting the angle of the guide rail to an initial angle state, then normally pouring concrete of the section 16 of the tower column to the variable cross section of the next step, and recycling to the step A;
the sizes of the first bracket, the second bracket and the third bracket are reduced in sequence.
5. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 1, wherein the formwork in the hydraulic formwork construction process is a wood beam formwork, two of the outer side formworks are fixed in size, and the rest formworks are cut and cut along with the change of the height of the tower column.
6. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 4, wherein the lifting mechanism is a chain structure and the lower end of the chain is provided with a hook, the lifting mechanism is provided with a pair of corresponding formwork sides and is arranged on the climbing frame body, the formwork comprises a panel, a vertical rib and a transverse rib, one side surface of the panel is the inner side surface of the poured concrete, the other side surface of the panel is the outer side surface, the vertical ribs are provided with a plurality of vertical ribs and are fixed on the outer side surface of the panel at vertical intervals, a pair of hanging rings are fixed at the upper ends of the vertical ribs at two sides and are matched and detachably fixed with the hooks of the pair of lifting mechanisms, the transverse rib is provided with a plurality of transverse ribs and is fixed on the vertical ribs at transverse intervals, the vertical ribs and the transverse ribs are I-shaped steel, a pair of auxiliary mechanisms are arranged at the positions of the lower part of the formwork corresponding, one end of each of the pair of hinged rods is hinged with one end of the connecting piece, the other end of each of the pair of hinged rods is hinged with the lower portion of the template and the climbing frame body, one end of a pull rope is fixed on each connecting piece, the other end of each pull rope is fixedly connected to a chain, the backward moving template is realized by upwards driving the template to integrally upwards and backwards move through a lifting mechanism, and in an initial state, the pull ropes are tightened, and the chains are in a downward bending state.
7. The hydraulic climbing formwork construction process in the cable tower construction process according to claim 6, wherein a through hole is formed in a web plate of an I-shaped steel of the cross rib, a circular ring is fixed to the other end of one of the hinge rods, the circular ring penetrates through the through hole and is sleeved and freely rotates in the through hole, the connecting piece is of a soft wear-resistant sheet structure, two ends of the connecting piece are respectively connected to the pair of hinge rods in a fixed mode, the pull rope is a flat belt-shaped rope, and the two ends of the pull rope are fixed to the chain after penetrating through the through hole and sleeved from the lower portion of the connecting piece.
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