CN103362300B - Cast-in-situ concrete arc step viewing platform form board structure and mold method - Google Patents
Cast-in-situ concrete arc step viewing platform form board structure and mold method Download PDFInfo
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Abstract
The invention discloses cast-in-situ concrete arc step viewing platform form board structure and mold method.Formwork structure comprises template support frame body and template fixed system, template fixed system to comprise outside Curved beam soffit formwork, seat plate soffit formwork, Curved beam lower bolster and Curved beam inner side template outside cope match-plate pattern, Curved beam, and outside Curved beam, lower bolster is positioned at the below of cope match-plate pattern outside Curved beam; Support by inner support between cope match-plate pattern and Curved beam inner side template outside Curved beam and make cope match-plate pattern and Curved beam inner side template outside Curved beam keep the spacing set, being connected with Curved beam inner side template by cope match-plate pattern outside Curved beam with split bolt and fixing, outside Curved beam, lower bolster and Curved beam inner side template are also connected with split bolt and fix; Curved beam soffit formwork respectively with Curved beam outside lower bolster bottom, Curved beam inner side template bottom be connected and fixed; Seat plate soffit formwork respectively with Curved beam outside lower bolster upper end and Curved beam inner side template upper end be connected and fixed.
Description
Technical field
The present invention relates to a kind of cast-in-situ concrete arc step viewing platform form board structure and mold method.
Background technology
Along with the continuous demand that people live to entertainment, stadiums, performing art field, cinema etc. are built will be more and more general, and the construction of notch cuttype concrete arc grandstand is the chief component forming above-mentioned building.For notch cuttype Arc Stand, its advantage is that curve smoothness is attractive in appearance, not only can bring people with the enjoyment of U.S., and grandstand plane figure is reasonable, can save building land to greatest extent.But circular arc grandstand complicated construction technique, particularly template construction is time-consuming, according to conventional method, not only long construction period, circulation material have high input, labour intensity is large, and give that surveying and locating, supporting frame are set up, template precision controlling brings great difficulty, very easily cause axis, absolute altitude deviation and grandstand sectional dimension inaccurate in construction, hidden danger of quality can be left time serious and even cause and do over again.
Particularly the formwork support process of circular arc grandstand is more complicated, once method of operating is improper, not only construction speed is slow, and is easy to leave hidden danger of quality or cause do over again.The following two kinds of mold methods of general employing at present:
1, " hang mould and add buttress method ": namely side template end opening props up template by the method for precast concrete or mortar buttress at a certain distance.Time in this way, not only beam, slab muscle are not easy to time closeer lay and adjustment, and template end opening and prefabricated buttress contact surface less, buttress is not easy to reliable fixing, and in concrete construction, the as easy as rolling off a log template that makes produces displacement, even causes component cross dimensions to exceed design or job specfication requirement.
2, common split heads formwork method: namely add common supporting steel bar at a certain distance at side template end opening.Because the rigidity of common supporting steel bar is less, deflection is large, easily produces distortion in work progress, is not easy to the relative position and the physical dimension that ensure cast-in-place concrete structure.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cast-in-situ concrete arc step viewing platform form board structure.
The another one technical problem that the present invention will solve is to provide a kind of mold method of cast-in-situ concrete arc step grandstand.
For cast-in-situ concrete arc step viewing platform form board structure, the technical solution used in the present invention is:
Cast-in-situ concrete arc step viewing platform form board structure, formwork structure comprises template support frame body and template fixed system, template fixed system to comprise outside Curved beam soffit formwork, seat plate soffit formwork, Curved beam lower bolster and Curved beam inner side template outside cope match-plate pattern, Curved beam, outside Curved beam, cope match-plate pattern and Curved beam inner side template are concentric circles arc formwork, and outside Curved beam, lower bolster is positioned at the below of cope match-plate pattern outside Curved beam; Support by inner support between cope match-plate pattern and Curved beam inner side template outside Curved beam and make cope match-plate pattern and Curved beam inner side template outside Curved beam keep the spacing set, to be connected with Curved beam inner side template by cope match-plate pattern outside Curved beam with split bolt and carry on the back rib by butterfly card and arc two steel pipe and fix, outside Curved beam, lower bolster and Curved beam inner side template are also connected with split bolt and adopt butterfly card and arc pair steel pipe to carry on the back rib and fix; Curved beam soffit formwork respectively with Curved beam outside lower bolster bottom, Curved beam inner side template bottom be connected and fixed; Seat plate soffit formwork respectively with Curved beam outside lower bolster upper end and Curved beam inner side template upper end be connected and fixed;
Inner support is supporting steel bar; Supporting steel bar has a cross bar, and cross bar two ends are provided with fagging, and fagging is vertical with cross bar and be parallel to each other, and cross bar is provided with U-shaped bracket upwards; Fagging props up lower bolster outside Curved beam inner side template and Curved beam respectively, and the bottom of cope match-plate pattern outside Curved beam held by U-shaped bracket.
As preferably, outside Curved beam soffit formwork, seat plate soffit formwork, Curved beam, outside cope match-plate pattern, Curved beam, lower bolster and Curved beam inner side template are wood plywood, bamboo plywood or steel and wood composite plate.
As preferably, the thickness of Curved beam soffit formwork is not less than 20mm; Outside seat plate soffit formwork, Curved beam, outside cope match-plate pattern, Curved beam, the thickness of lower bolster and Curved beam inner side template is not less than 15mm.
As preferably, supporting steel bar reinforcing bar and Plate Welding are made.
As preferably, sleeve pipe is inserted in split bolt stage casing, and the width of casing length and Curved beam is suitable.
As preferably, template support frame body comprises socket joint dish button adjustable scaffold, adjustable vertical rod and U-shaped jacking;
Socket joint dish button adjustable scaffold comprises cross bar, vertical rod; Two end band wedge shape plugs on cross bar, suitable position tep reel button in vertical rod, buckles internal locking by the dish that cross bar two ends wedge shape plug inserts in adjacent vertical rod when setting up;
The screw mandrel that adjustable vertical rod structure is an end band nut, an end band socket joint dish is buckled, screw mandrel diameter vertical rod internal diameter matches, and after vertical rod is inserted in screw mandrel one end, rotating nut and its height adjustable, see that tune vertical rod is arranged on the suitable position in support body vertical rod;
The structure of U-shaped jacking is top is U-shaped mouth, and the screw mandrel of lower bands nut is welded, and screw mandrel diameter and bottom vertical rod internal diameter match, after screw mandrel inserts vertical rod, and rotating nut and its height adjustable.
For the mold method of cast-in-situ concrete arc step grandstand, the technical solution used in the present invention comprises the following steps:
(1) place process and grandstand setting-out: grandstand sequence of construction is radially oblique grandstand concrete beam and the seat plate of vibrating step by step from the bottom to top of beam, because template different parts load-bearing great disparity differs greatly, very high to the intensity of formwork bracing system, rigidity and stability requirement, bottom bracing frame, ground should carry out load capacity calculation in advance, sclerosis and consolidation process, meet requirement for bearing capacity, and place is smooth as far as possible, is convenient to grandstand setting-out and support body is set up;
The intersecting point coordinate of longitudinal and transverse axis and arc beams is gone out according to design drawing calculated in advance, scene utilizes total powerstation to release corresponding circular curve and radial cant beam position on the ground, this is circular arc Stand Beams projection line in the horizontal plane, to set up the reference line of falsework and formwork as circular arc grandstand;
(2) socket joint dish button adjustable scaffold is set up: after grandstand setting-out, according to the curvature of Curved beam, arc is selected to combine to the cross bar length of unit support body and vertical rod, whole supporting frame is assemblied to form between adjacent cells support body, for making support body load-bearing evenly and good integrity, bottom of upright rod establishes base or chock, during support body height >=4m, keep at a certain distance away along beam span direction and arrange vertical bridging, this work generally finally completes after support body is set up;
(3) transverse tube at the bottom of U-shaped jacking and beam is fixed: when support body is set up after to Curved beam soffit formwork or seat plate soffit formwork, U-shaped jacking is used to the device of adjusting bracket height, its lower end screw rod inserts in support body vertical rod, upper end U-shaped mouth is used for jacking keel, for meeting the rigidity requirement of rest, jib-length≤600mm that rest stretches out; Transverse tube at the bottom of beam and vertical rod fixing, generally still adopts spigot-and-socket to fix, when vertical rod dish button bit is put inconsistent with bottom elevation, common steel tube also can be adopted to be connected and fixed with fastener;
(4) grandstand Curved beam soffit formwork, Curved beam inner side template are installed: after bottom support frame is set up, and support body transverse tube is installed keel, paving Curved beam soffit formwork successively, installs lower bolster outside Curved beam inner side template, Curved beam and fix;
(5) grandstand reinforcing bar binding: after lower bolster and Curved beam inner side template install outside Curved beam soffit formwork, Curved beam, can carry out the reinforcing bar binding of grandstand;
(6) supporting steel bar is installed fixing: for ease of installing and fixing outer side mold, the installation can carrying out supporting steel bar after reinforcing bar binding completes is fixed, the cut lengths of supporting steel bar is used for controlling the breadth of section of Stand Beams, U-shaped bracket on supporting steel bar, be used for the outside cope match-plate pattern of jacking Curved beam, to ensure the relative position of Stand Beams and the accurate of physical dimension;
(7) Curved beam inner side template and Curved beam outboard template are installed fixing: after supporting steel bar is by Curved beam template Primary Location, the spacing auger shell keyhole of 800 ~ 1200mm is pressed immediately, thereafter at the additional plastic bushing matched of split bolt on inside and outside side form; Two for the arc being contained in inner and outer template both sides steel pipe back of the body rib, through after template, is strained and reinforces by nut, butterfly card, split bolt by split bolt;
(8) bracing frame bridging is reinforced: after bracing frame, model sheetinstallat terminate, conscientiously check support body and template, and complete setting up of bridging;
(9) concreting: in concreting process, send special messenger carry out template, bracing frame inspection with go along with sb. to guard him, prevent template in concrete construction from occurring deviation.
The invention has the beneficial effects as follows:
(1) formwork erecting structure is reliably firm, and Curved beam form surfacing adopts wooden plywood, bamboo plywood or steel and wood composite template can meet construction requirement completely, not only constructs, has enough to meet the need conveniently, flexibly, and cost is cheap relative to other template;
(2) supporting frame adopts socket joint type dish buckle type scaffold, and rationally increase tunable arrangement, less demanding to the technical level of taking, tearing open workman, general general work just can complete, and construction fast, and assembling flexibly.Support body is assemblied to form by Modular units support body, and the supporting frame being applicable to Construction of Complex Structure is set up.According to common steel tube scaffold building, not only construction efficiency is low, and the discrepancy in elevation of Stand Beams changes and arc change place, needs to cut a large amount of steel pipe, greatly increases construction cost.
(3) prop up mold materials and accessory reusable, improve the turnover utilization rate of the materials such as template, bracing frame, bolt.
(4) shorten the duration, save cost.Only spigot-and-socket scaffold one is compared with conventional method, and the rate of cost reduction reaches 25%.
(5) concrete formation quality meets delivery receiving acceptance standard, reaches the effect of " the outer light of interior reality, corner angle are neat, and physical dimension is accurate ".
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the molding plate fixed structure schematic diagram of cast-in-situ concrete arc step viewing platform form board constructive embodiment of the present invention.
Fig. 2 is the supporting frame structural representation of cast-in-situ concrete arc step viewing platform form board constructive embodiment of the present invention.
Fig. 3 is the structural representation of supporting steel bar.
Fig. 4 is the structural representation of adjustable vertical rod.
Fig. 5 is the structural representation of U-shaped jacking.
In figure, 1-inner side template, cope match-plate pattern outside 2-, lower bolster outside 3-, 4-base plate template, 5-seat plate soffit formwork, 6-supporting steel bar, 601-cross bar, 602-fagging, 603-column, 604-U shape bracket, 7-split bolt, 8-sleeve pipe, 9-Concrete seat pad, 10-a tree, used in making timber for boats wood, 11-wood is stupefied, 12-cross bar, 13-U shape jacking, 1301-U shape channel-section steel, 1302-screw mandrel, 1303-nut, vertical rod that 14-is adjustable, 1401-socket joint dish is buckled, 1402-screw mandrel, 1403-nut, the radial cant beam of 15-, 16-vertical rod, 17-bridging.
Detailed description of the invention
It is a cast-in-situ concrete Arc Stand that the present embodiment will be built, and is made up of radial cant beam, hoop Curved beam, arc seat plate.The horizontal projection of overall grandstand similarly is a fan-shaped concentric circles, and vertical cross section similarly is the step of stair.
Concrete structure is: Curved beam, seat plate two ends are all supported on radial cant beam, and radial cant beam, Curved beam, arc seat plate are built as a whole, and the negative and positive angle of Curved beam and seat plate intersection is right angle.
Radial cant beam is main frame beam, and cross section is generally about 500 × 1500mm, and the angle between ground is generally at about 30 °;
The construction of Curved beam (also known as hoop waffle beam) is the key problem in technology that the present embodiment will solve, and its horizontal projection is curved, and vertical cross section is rectangular, and cross section is mostly about 300 × 600mm.
Seat plate is above Curved beam, and horizontal projection is curved, and vertical cross section is rectangular, and cross section is generally 850 × 100mm.
Cast-in-situ concrete arc step viewing platform form board structure, formwork structure comprises template support frame body and molding plate fixed structure.
As shown in Figure 1, the molding plate fixed structure of cast-in-situ concrete Arc Stand to comprise outside Curved beam base plate template 4, seat plate soffit formwork 5, Curved beam lower bolster 3 and Curved beam inner side template 1 outside cope match-plate pattern 2, Curved beam.
Outside Curved beam, cope match-plate pattern 2 and Curved beam inner side template 1 are concentric circles arc formwork, for the inside and outside contour of restriction arc ellbeam.Outside Curved beam, lower bolster 3 to be located at outside Curved beam immediately below cope match-plate pattern 2.
Support with supporting steel bar 6 between cope match-plate pattern and Curved beam inner side template outside Curved beam and make cope match-plate pattern 2 and Curved beam inner side template 1 outside Curved beam keep the spacing set.Concrete seat pad 9 is provided with below supporting steel bar 6.
With split bolt 7, cope match-plate pattern outside Curved beam is connected with Curved beam inner side template, fix at the two ends nut of split bolt, butterfly card and arc two steel pipe back of the body rib, outside Curved beam, lower bolster 3 and Curved beam inner side template 1 are also connected with split bolt 7 and adopt nut, butterfly card and arc pair steel pipe to carry on the back rib and lower bolster outside Curved beam 3 and Curved beam inner side template 1 fixed.PVC sleeve pipe 8 is provided with in the middle of split bolt.
Curved beam base plate template 4 respectively with Curved beam outside the bottom of lower bolster 3, the bottom of Curved beam inner side template 1 be connected and fixed.
Seat plate soffit formwork 5 respectively with Curved beam outside the upper end of lower bolster 3 and the upper end of Curved beam inner side template 1 be connected and fixed.
After viewing platform form board is installed, outside Curved beam, cope match-plate pattern is suitable for reading uses a tree, used in making timber for boats wood 10 radially drawknot more at a certain distance, namely be connected as a whole with a tree, used in making timber for boats wood 10 by cope match-plate pattern outside Curved beam by wood stupefied 11, wood stupefied 11 nails the lateral surface of outside Curved beam cope match-plate pattern.
The making of cast-in-situ concrete Arc Stand template, comprises form surfacing, the keel of support shuttering panel, Curved beam fixing templates and viewing platform form board bottom support support body.Specific practice is as follows:
1) form surfacing: comprise beam, all bed dies of seat plate and side template.Above-mentioned panel is wood plywood, bamboo plywood or steel and wood composite plate.When beam bottom mother plate adopt thickness when wood, Bamboo Formwork general ≮ 20mm; When plate and side template adopt wood, Bamboo Formwork template thickness general ≮ 15mm.
2) keel of support shuttering panel: back support horizontal secondary joist and the vertical main joist of above-mentioned each form surfacing, main joist is fixed on supporting frame crossbeam, and supporting traverse two ends and support body column are connected and fixed.Above-mentioned main joist, secondary joist, temporary support can use steel pipe, wooden a tree, used in making timber for boats, channel-section steel or square steel.
3) notch cuttype Curved beam fixing templates: fixing templates is reinforced two steel pipe, split bolt, PVC sleeve pipe, butterfly card, wooden a tree, used in making timber for boats etc. by supporting steel bar, Curved beam and formed.
Outside Curved beam, the relative position of cope match-plate pattern is located by supporting steel bar, namely on each step, laterally fixes a supporting steel bar at a certain distance, and the reinforcing bar spot welding on supporting steel bar and beam or plate is fixed, and bottom is Concrete seat pad 9.Outside Curved beam, cope match-plate pattern stands up in the U-shaped bracket of supporting steel bar.
As shown in Figure 3, supporting steel bar reinforcing bar and Plate Welding are made, wherein cross bar 601 is a long reinforcing bar, its length equals the width of the width+seat plate section of two Curved beam sections, the fagging 602 that a rectangular sheet is made respectively is welded at the two ends of cross bar, and for controlling Curved beam section width, cross bar is vertically welded with reinforcing steel bar upright post 603 by Curved beam lateral ends position, U-shaped bracket 604 made by the upper end channel-section steel of column, and outside the width of U-shaped bracket 604 opening and Curved beam, cope match-plate pattern 2 thickness matches.
Curved beam reinforces steel pipe: employing section is the steel pipe of Φ 48 × 3.2 ~ 3.5, and buckling is arc, and arc curvature is consistent with the curvature of beam.Adopt 2 curved steel tubes to form back of the body rib, every 4 Curved beams reinforcing steel pipe and butterfly card, split bolt are combined as one group of Curved beam and reinforce steel pipe.
Split bolt: Φ 12 ~ 14 round steel with certain length processes, two ends car silk, and be with the nut matched;
PVC sleeve pipe: the circular hard PVC pipe that wall thickness 2 ~ 3mm is thick, length is with beam section width, and internal diameter and Screw arbor with nut at both-ends diameter match;
Butterfly card: the band steel thick by 2 ~ 3mm is stamped to form, its section configuration is the figure of three, and open hole in the middle of section, bore dia and screw diameter match;
A tree, used in making timber for boats wood: processed by hard wood.Section configuration has: 50 × 100mm, 40 × 90mm, 40 × 70mm, 50 × 50mm, and section and length are processed on demand;
Wood is stupefied: processed by hard wood.Cross dimensions: 50 × 50mm, length is processed on demand;
The two scaffold tube of Curved beam side template is reinforced by split bolt, butterfly card, nut, for ease of dismounting and the turnover of split bolt, beam inner bolt add that cover matches PVC sleeve pipe; The radian of Curved beam reinforcing steel pipe (being two scaffolding steel pipes) should be consistent with Curved beam radian.
Arc Stand template bottom support support body as shown in Figure 2.Mounting method is as follows:
1) template support frame body adopts socket joint type dish buckle type scaffold;
2) supporting frame is made up of the cross bar 11 of Φ 48 × 3.2 ~ 3.5, vertical rod 16 and adjustable vertical rod 14 and U-shaped jacking 13.The length choice criteria bar progress row reasonable combination according to actual needs of cross bar, vertical rod, wherein the full-length of cross bar can be selected by 600 ~ 1550mm, five kinds of models, and the full-length of vertical rod can be selected by 1200 ~ 3000mm, tetra-kinds of models.
Two end band wedge shape plugs on cross bar 11, suitable position tep reel button in vertical rod 16, buckles internal locking by the dish that cross bar two ends wedge shape plug inserts in adjacent vertical rod when setting up;
3) height of notch cuttype viewing platform form board regulates and carries out flexible on demand by adjustable vertical rod 14 or U-shaped jacking 13 or connect height;
4) as shown in Figure 4, the screw mandrel 1402 that adjustable vertical rod 14 buckles 1401 by end band nut 1403, end band socket joint dish forms, screw mandrel diameter and bracing frame vertical rod internal diameter match, after vertical rod is inserted in screw mandrel one end, rotating nut and its height adjustable, adjustable vertical rod is arranged on the suitable position in support body vertical rod, and the adjustable vertical rod joint location in adjacent vertical rod is staggered mutually, makes it can not be located at the same section of adjacent vertical rod;
5) U-shaped jacking is arranged on support body top.As shown in Figure 5, U-shaped jacking is top is U-type groove steel 1301 sections, and the screw mandrel 1302 of lower bands nut 1303 is welded, and screw mandrel diameter and bottom vertical rod internal diameter match, after screw mandrel inserts vertical rod, and rotating nut and its height adjustable.
6) the arc line shaped supporting frame of whole grandstand is completed by several linear pattern spigot-and-socket unit support body assembling combination, and the length of unit support body, according to the curvature requirement of Curved beam, selects the cross bar of different length and vertical rod socket joint to combine;
The construction method of cast-in-site concrete arc viewing platform form board, step is as follows:
(1) place process and grandstand setting-out: grandstand sequence of construction is radially oblique grandstand concrete beam and the seat plate of vibrating step by step from the bottom to top of beam, template different parts load-bearing great disparity differs greatly, very high to the intensity of formwork bracing system, rigidity and stability requirement, bottom bracing frame, ground should carry out load capacity calculation in advance, sclerosis and consolidation process, meet requirement for bearing capacity, and place is smooth as far as possible, is convenient to grandstand setting-out and support body is set up;
The intersecting point coordinate of longitudinal and transverse axis and arc beams is gone out according to design drawing calculated in advance, scene utilizes total powerstation to release corresponding circular curve and radial cant beam position on the ground, this is circular arc Stand Beams projection line in the horizontal plane, to set up the reference line of falsework and formwork as circular arc grandstand;
(2) socket joint dish button adjustable scaffold is set up: after grandstand setting-out, according to the curvature of Curved beam, arc is selected to combine to the cross bar length of unit support body and vertical rod, whole supporting frame is assemblied to form between adjacent cells support body, for making support body load-bearing evenly and good integrity, bottom of upright rod establishes base or chock, as support body height >=4m, keep at a certain distance away along beam span direction and arrange vertical bridging 17, this work generally finally completes after support body is set up;
(3) transverse tube at the bottom of U-shaped jacking and beam is fixed: when support body is set up to beam (plate) template, the height of support body is regulated with U-shaped jacking 13, namely the lower end screw rod of U-shaped jacking inserts in support body vertical rod, upper end U-shaped mouth is used for jacking keel, for meeting the rigidity requirement of rest, jib-length≤600mm that rest stretches out; Main joist lower crosstalk tube at the bottom of beam and vertical rod fixing, generally still adopts spigot-and-socket to fix, when other vertical rod dish button bit individual is put inconsistent with bottom elevation, common steel tube can be adopted to be connected and fixed with fastener;
(4) grandstand Curved beam soffit formwork, Curved beam inner side template are installed: after bottom support frame is set up, and support body transverse tube is installed keel, paving Curved beam soffit formwork successively, installs lower bolster outside Curved beam inner side template, Curved beam and fix;
(5) grandstand reinforcing bar binding: after Curved beam soffit formwork and Curved beam inner side template install, can carry out the reinforcing bar binding of grandstand;
(6) supporting steel bar is installed fixing: for ease of installing and fixing outer side mold, the installation can carrying out supporting steel bar after reinforcing bar binding completes is fixed, the cut lengths of supporting steel bar is used for controlling the breadth of section of Stand Beams, U-shaped bracket on supporting steel bar, be used for the outer side mold of jacking Curved beam, accurate with the relative position and physical dimension that ensure Stand Beams;
(7) Curved beam inner side template and Curved beam outboard template are installed fixing: after supporting steel bar is by Curved beam template Primary Location, the spacing auger shell keyhole of 800 ~ 1200mm is pressed immediately, thereafter at the additional plastic bushing matched of split bolt on inside and outside side form; Split bolt, through after template, uses nut, butterfly card, split bolt that two for the arc being contained in inner and outer template both sides steel pipe is strained and reinforced;
(8) bracing frame bridging is reinforced: after bracing frame, model sheetinstallat terminate, conscientiously check support body and template, and complete setting up of bridging 17;
(9) concreting: in concreting process, send special messenger carry out template, bracing frame inspection with go along with sb. to guard him, prevent template in concrete construction from occurring deviation.
Claims (6)
1. cast-in-situ concrete arc step viewing platform form board structure, described formwork structure comprises template support frame body and template fixed system, it is characterized in that: described template fixed system to comprise outside Curved beam soffit formwork, seat plate soffit formwork, Curved beam lower bolster and Curved beam inner side template outside cope match-plate pattern, Curved beam, outside described Curved beam, cope match-plate pattern and Curved beam inner side template are concentric circles arc formwork, and outside described Curved beam, lower bolster is positioned at the below of cope match-plate pattern outside described Curved beam; Support by inner support between cope match-plate pattern and Curved beam inner side template outside described Curved beam and make cope match-plate pattern and Curved beam inner side template outside Curved beam keep the spacing set, to be connected with Curved beam inner side template by cope match-plate pattern outside Curved beam with split bolt and carry on the back rib by butterfly card and arc two steel pipe and fix, outside described Curved beam, lower bolster and Curved beam inner side template are also connected with split bolt and adopt butterfly card and arc pair steel pipe to carry on the back rib and fix; Described Curved beam soffit formwork respectively with Curved beam outside lower bolster bottom, Curved beam inner side template bottom be connected and fixed; Described seat plate soffit formwork respectively with Curved beam outside lower bolster upper end and Curved beam inner side template upper end be connected and fixed;
Described inner support is supporting steel bar; Described supporting steel bar has a cross bar, and described cross bar two ends are provided with fagging, and described fagging is vertical with cross bar and be parallel to each other, and cross bar is provided with U-shaped bracket upwards; Described fagging props up lower bolster outside Curved beam inner side template and Curved beam respectively, and the bottom of cope match-plate pattern outside Curved beam held by described U-shaped bracket.
2. cast-in-situ concrete arc step viewing platform form board structure according to claim 1, is characterized in that: outside described Curved beam soffit formwork, seat plate soffit formwork, Curved beam, outside cope match-plate pattern, Curved beam, lower bolster and Curved beam inner side template are wood plywood, bamboo plywood or steel and wood composite plate.
3. cast-in-situ concrete arc step viewing platform form board structure according to claim 2, is characterized in that: the thickness of described Curved beam soffit formwork is not less than 20mm; Outside described seat plate soffit formwork, Curved beam, outside cope match-plate pattern, Curved beam, lower bolster and Curved beam inner side template thickness are not less than 15mm.
4. cast-in-situ concrete arc step viewing platform form board structure according to claim 1, is characterized in that: sleeve pipe is inserted in described split bolt stage casing, and the width of described casing length and Curved beam is suitable.
5. cast-in-situ concrete arc step viewing platform form board structure according to claim 1, is characterized in that: described template support frame body comprises socket joint dish button adjustable scaffold, adjustable vertical rod and U-shaped jacking;
Described socket joint dish button adjustable scaffold comprises cross bar, vertical rod; Two end band wedge shape plugs on described cross bar, suitable position tep reel button in described vertical rod, buckles internal locking by the dish that cross bar two ends wedge shape plug inserts in adjacent vertical rod when setting up;
The screw mandrel that described adjustable vertical rod structure is an end band nut, an end band socket joint dish is buckled, screw mandrel diameter vertical rod internal diameter matches, after vertical rod is inserted in screw mandrel one end, rotating nut and its height adjustable, adjustable vertical rod is arranged on the suitable position in support body vertical rod;
The structure of described U-shaped jacking is top is U-shaped mouth, and the screw mandrel of lower bands nut is welded, and screw mandrel diameter and bottom vertical rod internal diameter match, after screw mandrel inserts vertical rod, and rotating nut and its height adjustable.
6. the mold method of cast-in-situ concrete arc step grandstand, is characterized in that comprising the following steps:
(1) place process and grandstand setting-out: grandstand sequence of construction is radially oblique grandstand concrete beam and the seat plate of vibrating step by step from the bottom to top of beam, because template different parts load-bearing great disparity differs greatly, very high to the intensity of formwork bracing system, rigidity and stability requirement, bottom bracing frame, ground should carry out load capacity calculation in advance, sclerosis and consolidation process, meet requirement for bearing capacity, and place is smooth as far as possible, is convenient to grandstand setting-out and support body is set up;
The intersecting point coordinate of longitudinal and transverse axis and arc beams is gone out according to design drawing calculated in advance, scene utilizes total powerstation to release corresponding circular curve and radial cant beam position on the ground, this is circular arc Stand Beams projection line in the horizontal plane, to set up the reference line of falsework and formwork as circular arc grandstand;
(2) socket joint dish button adjustable scaffold is set up: after grandstand setting-out, according to the curvature of Curved beam, arc is selected to combine to the cross bar length of unit support body and vertical rod, whole supporting frame is assemblied to form between adjacent cells support body, for making support body load-bearing evenly and good integrity, bottom of upright rod establishes base or chock, during support body height >=4m, keep at a certain distance away along beam span direction and arrange vertical bridging, this work generally finally completes after support body is set up;
(3) transverse tube at the bottom of U-shaped jacking and beam is fixed: when support body is set up after to Curved beam soffit formwork or seat plate soffit formwork, U-shaped jacking is used to the device of adjusting bracket height, its lower end screw rod inserts in support body vertical rod, upper end U-shaped mouth is used for jacking keel, for meeting the rigidity requirement of rest, jib-length≤600mm that rest stretches out; Transverse tube at the bottom of beam and vertical rod fixing, generally still adopts spigot-and-socket to fix, when vertical rod dish button bit is put inconsistent with bottom elevation, common steel tube also can be adopted to be connected and fixed with fastener;
(4) grandstand Curved beam soffit formwork, Curved beam inner side template are installed: after bottom support frame is set up, and support body transverse tube is installed keel, paving Curved beam soffit formwork successively, installs lower bolster outside Curved beam inner side template, Curved beam and fix;
(5) grandstand reinforcing bar binding: after lower bolster and Curved beam inner side template install outside Curved beam soffit formwork, Curved beam, can carry out the reinforcing bar binding of grandstand;
(6) supporting steel bar is installed fixing: for ease of installing and fixing outer side mold, the installation can carrying out supporting steel bar after reinforcing bar binding completes is fixed, the cut lengths of supporting steel bar is used for controlling the breadth of section of Stand Beams, U-shaped bracket on supporting steel bar, be used for the outside cope match-plate pattern of jacking Curved beam, to ensure the relative position of Stand Beams and the accurate of physical dimension;
(7) Curved beam inner side template and Curved beam outboard template are installed fixing: after supporting steel bar is by Curved beam template Primary Location, press the spacing auger shell keyhole of 800 ~ 1200mm immediately, thereafter at the additional plastic bushing matched of split bolt on inside and outside side form; Two for the arc being contained in inner and outer template both sides steel pipe back of the body rib, through after template, is strained and reinforces by nut, butterfly card, split bolt by split bolt;
(8) bracing frame bridging is reinforced: after bracing frame, model sheetinstallat terminate, conscientiously check support body and template, and complete setting up of bridging;
(9) concreting: in concreting process, send special messenger carry out template, bracing frame inspection with go along with sb. to guard him, prevent template in concrete construction from occurring deviation.
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