CN113738398B - Assembled light upward arch web mold plate and construction method thereof - Google Patents
Assembled light upward arch web mold plate and construction method thereof Download PDFInfo
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- CN113738398B CN113738398B CN202111014406.1A CN202111014406A CN113738398B CN 113738398 B CN113738398 B CN 113738398B CN 202111014406 A CN202111014406 A CN 202111014406A CN 113738398 B CN113738398 B CN 113738398B
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- 238000010276 construction Methods 0.000 title claims abstract description 50
- 210000001015 abdomen Anatomy 0.000 claims abstract description 162
- 230000007306 turnover Effects 0.000 claims abstract description 116
- 238000000034 method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000009415 formwork Methods 0.000 claims description 14
- 230000003187 abdominal effect Effects 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 15
- 230000006872 improvement Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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Abstract
The invention belongs to the field of tunnel engineering, and particularly discloses an assembled light-weight upward arch belly mold template and a construction method for tunnel inverted arch construction by using the same. The light inverted arch belly mold template comprises a first inverted belly mold template, a second inverted belly mold template, a plurality of longitudinal beam bases arranged along the depth direction of an inverted arch and at least one template overturning and retracting device; the first turnover belly mold template and the second turnover belly mold template are respectively assembled by a plurality of small templates; the assembled light upward arched belly mold template single template has small size and light weight, is convenient for adjusting the fitting degree of the template and a foundation pit, reduces the occupation of a tunnel space, reduces the influence on the construction of other work types in the tunnel and is convenient for transportation; the middle part of the inverted arch is not provided with a template, so that a rough surface is naturally formed after concrete in the middle part of the inverted arch is poured, and the bonding of new and old concrete after the subsequent secondary concrete pouring process is facilitated; the demolding process of the template is simple and feasible, and a complex demolding device is omitted.
Description
Technical Field
The invention belongs to the field of tunnel construction, and particularly relates to an assembled light-weight upward arch web mold plate and a construction method thereof.
Background
In recent years, tunnel construction technology in China is continuously developed; the inverted arch is arranged at the bottom of the tunnel as a reverse arch structure for improving the stress condition of the supporting structure at the upper part of the tunnel, and is an important component of the tunnel structure. The construction quality and construction speed of the inverted arch can directly influence the safety and construction period of the whole tunnel construction. The inverted arch belly mold template commonly applied in the market at present is a full-width integral arc steel template, and is integrally manufactured, so that the degree of fit with a foundation pit is poor during inverted arch construction, and the construction quality of the inverted arch is affected; the size of the template is larger, the time for disassembling the template is long, meanwhile, the space occupied by the template is large, and the construction of other work types in the tunnel is influenced, so that the construction efficiency is reduced; in addition, the template has large weight, large transportation difficulty and high cost.
In the prior art, some alternatives are provided for the full width upward arch web die template, so that the construction convenience and efficiency can be improved, and the construction cost can be reduced. For example, CN112228109a discloses an inverted arch form, which reduces the width of a single form by splitting the form into a side form, a turnover form and a middle form, and can achieve the positive effects of improving the convenience and efficiency of construction and reducing the cost of construction. However, the side templates and the turnover templates of the inverted arch template are longer, the middle template is wider, and the defects of large size and heavy weight of a single template still exist, so that the problems of poor fitting degree with a foundation pit, large occupied tunnel space and large transportation difficulty are caused; in addition, the inverted arch template is provided with the middle template, the surface of the concrete poured in the middle of the inverted arch is smooth, and the concrete is not easy to adhere to the concrete poured in the subsequent process; meanwhile, the side template of the inverted arch template is a fixed template, a lifter is required to be arranged to separate the inverted arch template from the inverted arch, demolding is achieved, and the device is complex.
Based on the defects and shortcomings, the art needs to make further improved designs on the existing inverted arch form template, and the inverted arch form template with smaller size, lighter weight and better fit degree with the foundation pit is provided, so that the problems of the existing inverted arch form template are solved.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides an assembled light upward arched belly mold template and a construction method for tunnel inverted arch construction by using the light upward arched belly mold template; the problem that in the prior art, the single-piece template of the inverted arch belly template is large in size and heavy is solved correspondingly by adopting a mode of splitting the inverted arch belly template into a plurality of small assembled templates; in addition, the middle template is not arranged, so that a rough surface is naturally formed after the concrete in the middle of the inverted arch is poured, and the problem that the concrete is not easy to adhere to the secondarily poured concrete can be correspondingly and effectively solved; on this basis, through the structure that connects the position to the template design, can effectively solve the complicated problem of template drawing of patterns mode.
In order to achieve the above object, according to one aspect of the present invention, there is provided an assembled light-weight overhead arch former template, comprising a first inverted former template, a second inverted former template, a plurality of stringer bases arranged in the depth direction of an inverted arch, and at least one template inverted retraction device; wherein,,
the longitudinal beam bases are positioned on one side of the inverted arch; one side of the first turnover belly mold template is sequentially and rotatably connected with the plurality of longitudinal beam bases, and all the connecting positions are positioned on the same axis so that the first turnover belly mold template can rotate around the axis; one side of the second turnover belly mold template is rotatably connected with the other side of the first turnover belly mold template; one end of each template overturning and folding device is connected with a longitudinal beam base, and the other ends of all the template overturning and folding devices are connected with the second overturning abdominal template to drive the second overturning abdominal template to overturn; the first overturning abdominal mold plate is formed by splicing a plurality of first small mold plates along the depth direction of the inverted arch; the second overturning abdominal mold template is formed by splicing a plurality of second small templates along the depth direction of the inverted arch.
Through the conception, the structural form of the half-width template is used for replacing the structural form of the full-width template, then the half-width inverted arch web template is split into a first overturning web template and a second overturning web template, and further split into a plurality of first small templates and second small templates; compared with the prior art, the size of the single split template is greatly reduced, so that the fit degree between the single split template and a foundation pit can be conveniently adjusted; the occupation of the tunnel space can be reduced, so that the influence on the construction of other work types in the tunnel is reduced; meanwhile, the weight of the template is reduced, and the construction and the transportation are convenient.
In addition, the template is not arranged in the middle of the inverted arch, so that a rough surface is naturally formed after concrete in the middle of the inverted arch is poured, the adhesion of new and old concrete after the subsequent secondary concrete pouring process is facilitated, and the new and old concrete is integrated; when the middle part of the inverted arch is prevented from using the template, the surface of the poured concrete is smooth, and rough cutting processing is needed to better bond the concrete with the secondarily poured concrete.
Meanwhile, in the conception, the first turnover belly mold plate and the longitudinal beam base, the second turnover belly mold plate and the first turnover belly mold plate are rotatably connected; when the template is demolded, the template overturning and retracting device drives the second overturning belly template to overturn upwards to demold, and then the second overturning belly template further drives one side, connected with the first overturning belly template, of the first overturning belly template to tilt to demold; according to the invention, the connection parts are researched and designed, so that the demolding process of the template is simple and feasible, and a complex demolding device is omitted.
Preferably, the opposite side surfaces of two adjacent first small templates are respectively provided with a first flange plate; two adjacent first flange plates are connected through bolts to form a first connecting unit; the first flange plates are connected in pairs to splice a plurality of first small templates into a first turnover belly template; the bolt connection mode is convenient to disassemble and assemble.
As a further preferred feature, each stringer base is located laterally of a first connecting unit, the two first flange plates of which are hinged to the stringer base to which they are adjacent; the first flange plates of the first connecting units are hinged with the longitudinal beam base one by one so as to realize the sequential rotatable connection of the first turnover abdomen mold plates and the longitudinal beam base.
Preferably, the opposite side surfaces of two adjacent second small templates are respectively provided with a second flange plate; two adjacent second flange plates are connected through bolts to form second connecting units, and the second connecting units are arranged one by one opposite to the first connecting units of the first overturning belly mold template; the second flange plates are connected in pairs to splice a plurality of second small templates into a second turnover belly template; the second connecting units of the second overturning belly mold template are arranged opposite to the first connecting units of the first overturning belly mold template one by one, so that the assembled light inverted arch belly mold template structure is continuous.
As a further preferable mode, the second overturning belly mold template is provided with a belly mold base cross beam which is connected with one end of the template overturning and retracting device far away from the longitudinal beam base; each web die base cross beam is positioned at the side of the template overturning and retracting device connected with the web die base cross beam and is connected with two second flange plates of a second connecting unit at the side of the template overturning and retracting device; the template overturning and retracting device is connected with the base cross beams of the belly mold one by one so as to realize the connection of the template overturning and retracting device and the second overturning belly mold.
As a further preferable mode, the template overturning and collecting device is an electric hoist; the main body of the electric hoist is connected with the longitudinal beam base, and the guide chain of the electric hoist is connected with the web die base cross beam.
Preferably, the first turnover belly mold template is provided with a plurality of first connecting seats at one side close to the second turnover belly mold template; the second turnover abdomen mould template is provided with a second connecting seat close to each first connecting seat; the second connecting seat is connected with the first connecting seat which is close to the second connecting seat through the first pin shafts, and all the first pin shafts are positioned on the same axis so as to realize rotatable connection of the second turnover abdomen mold plate and the first turnover abdomen mold plate.
Preferably, the length of each of the first small template and the second small template is 3m to 7m.
Preferably, the length of the first turnover belly mold template and the second turnover belly mold template is 11 m-20 m.
Preferably, the attached concrete vibrator is connected above the first turnover belly mold template and the second turnover belly mold template, and can be used for vibrating concrete in the subsequent process.
As an improvement of the technical scheme, rib plates are arranged on the first small template and the second small template in a longitudinal and transverse mode, so that the rib plates on the assembled light inverted arch die template form a longitudinal and transverse grid system; the rib plates can enable the assembled light inverted arch die template to be a stressed whole, and the rigidity and the impact resistance of the assembled light inverted arch die template are enhanced.
As another improvement of the above technical solution, the first small template and the second small template are both made of plastic steel; compared with the traditional steel template, the shape adaptability is strong, and the fitting degree with the tunnel inverted arch steel bar layer is higher; and has light weight and good toughness.
When the light-weight upward-facing arch web die template provided by the invention is used for tunnel inverted arch construction, one light-weight upward-facing arch web die template is respectively arranged at two sides of an inverted arch, and the light-weight upward-facing arch web die templates at two sides are preferably in mirror symmetry with the central line of the inverted arch as a symmetry axis; during construction, the light inverted arch web form plates on two sides are assembled, and then concrete pouring is carried out, so that the concrete stress on two sides of the inverted arch is uniform during construction.
Based on the above, according to another aspect of the present invention, there is provided a construction method for constructing a tunnel inverted arch using the lightweight inverted arch form, comprising the steps of:
step one: manufacturing a single first small template and a single second small template;
step two: splicing a plurality of first small templates into a first turnover belly template; splicing a plurality of second small templates into a second turnover belly template;
step three: one side of a first turnover belly mold template is connected with a longitudinal beam base, the other side of the first turnover belly mold template is connected with a second turnover belly mold template, and the first turnover belly mold template is attached to a bound steel bar layer below the first turnover belly mold template;
step four: one end of the template overturning and retracting device is connected with the longitudinal beam base, and the other end of the template overturning and retracting device is connected with a second overturning belly template;
step five: the template overturning and retracting device drives the second overturning belly template to overturn and put down so that the second overturning belly template is attached to the bound steel bar layer below the second overturning belly template; completing a first light-weight upward arch belly mold template;
step six: repeating the first to fourth steps by taking the center line of the inverted arch as a symmetry axis, and constructing a second inverted arch web die plate on one side of the inverted arch far away from the first inverted arch web die plate;
step seven: pouring inverted arch concrete;
step eight: after the concrete pouring is finished, the formwork overturning and retracting devices of the first upward arch web formwork and the second upward arch web formwork respectively drive the second overturning web formwork to overturn upwards so as to demould; the second turnover belly mold template further drives one side of the first turnover belly mold template to tilt up so as to be demolded.
After the steps one to eight of the construction method are completed, trestle bridges on two sides of the tunnel inverted arch are utilized to pull two side longitudinal beam bases, a template overturning and retracting device, a first overturning belly mold template and a second overturning belly mold template to move forward to the next station along the depth direction of the tunnel, and then the steps five to eight are repeatedly implemented.
In general, compared with the prior art, the above technical solution conceived by the present invention mainly has the following technical advantages:
1. the single formwork is small in size by splitting the inverted arch form, so that the fitting degree of the single formwork with a foundation pit is convenient to adjust, and the construction quality is improved; the occupation of the tunnel space can be reduced, so that the influence on the construction of other work types in the tunnel is reduced, and the construction efficiency is improved; meanwhile, the weight of the template is reduced, and the construction and the transportation are convenient.
2. The middle part of the inverted arch is not provided with the template, so that a rough surface is naturally formed after concrete in the middle part of the inverted arch is poured, the bonding of new and old concrete after the subsequent secondary concrete pouring process is facilitated, and the new and old concrete forms a whole.
3. Through adopting rotatable connection between first upset abdomen mould template and longeron base, between second upset abdomen mould template and the first upset abdomen mould template for the drawing of patterns process of template is simple easy and easy, and has just omitted complicated shedder.
4. As a preferable scheme of the invention, the first small template and the second small template are assembled in a mode of connecting the flange plates through bolts, so that the small templates are convenient to assemble and disassemble.
5. As a further improvement of the invention, the first connecting unit and the second connecting unit are arranged oppositely, and the rib plates of the longitudinal and transverse grid system are arranged, so that the assembled light inverted arch die template structure is continuous, becomes a stressed whole, and enhances the rigidity and the impact resistance of the assembled light inverted arch die template.
6. As another improvement of the invention, the template is made of plastic steel, has strong shape adaptability and higher fitting degree with the inverted arch steel bar layer of the tunnel; and the light-weight and high-toughness alloy can be repeatedly used.
Drawings
FIG. 1 is a schematic view of an assembled lightweight inverted arch form layout in accordance with an embodiment of the present invention;
FIG. 2 is a top view of an assembled lightweight spangle mold form in accordance with an embodiment of the present invention;
FIG. 3 is a side view of an assembled lightweight spangle mold form in accordance with an embodiment of the present invention;
FIG. 4 is a cross-sectional view A-A of an embodiment of the present invention at a web base beam;
FIG. 5 is a detailed view of the junction of a first flip web template and a second flip web template in accordance with an embodiment of the present invention;
fig. 6 is a schematic diagram of the turning of the first and second turning web templates according to an embodiment of the present invention.
The same reference numbers are used throughout the drawings to reference like elements or structures, wherein: the concrete vibrator comprises a first turnover belly mold plate, a second turnover belly mold plate, a 3-longitudinal beam base, a 4-electric hoist, a 5-first pin shaft, a 6-belly mold base beam, a 7-rib plate, an 8-attached concrete vibrator, a 9-reinforcing steel bar layer, a 11-first small mold plate, a 12-first flange plate, a 13-first connecting seat, a 14-first connecting unit, a 21-second small mold plate, a 22-second flange plate, a 23-second connecting seat and a 24-second connecting unit.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
FIG. 1 illustrates a schematic view of an assembled lightweight inverted arch form layout provided by an embodiment of the present invention; FIG. 2 illustrates a top view of an assembled lightweight spangle mold form in accordance with an embodiment of the present invention; FIG. 3 illustrates a side view of a fabricated lightweight spangle mold form in accordance with an embodiment of the present invention; FIG. 4 shows a cross-sectional view A-A at a web base beam of an embodiment of the invention; FIG. 5 illustrates a detailed view of the junction of a first flip web template and a second flip web template in accordance with an embodiment of the present invention; fig. 6 shows a schematic diagram of the inversion of a first inverted web form and a second inverted web form according to an embodiment of the invention. In order to better explain the assembled light-weight upward arch form template and the construction method thereof provided by the embodiment of the invention, the following details are provided with reference to the accompanying drawings and with reference to the specific embodiments:
as shown in fig. 1, the light-weight overhead arch master template provided by the embodiment of the invention comprises a first turnover master template 1, a second turnover master template 2, a plurality of longitudinal beam bases 3 arranged along the depth direction of the inverted arch and at least one template turnover and retraction device;
as shown in fig. 2, the stringer base 3 is located on the inverted arch side, and two are preferably provided in the embodiment of the present invention; one side of the first turnover belly mold template 1 is rotatably connected with each longitudinal beam base 3 in turn, and all the connecting positions are positioned on the same axis so that the first turnover belly mold template 1 can rotate around the axis; one side of the second turnover belly mold template 2 is rotatably connected with the other side of the first turnover belly mold template 1; in the embodiment, two mold overturning and retracting devices are preferably arranged; one end of each template overturning and folding device is connected with a longitudinal beam base 3, and the other ends of all the template overturning and folding devices are connected with the second overturning abdominal mould templates 2 so as to drive the second overturning abdominal mould templates 2 to overturn; the first turnover belly mold template 1 is formed by splicing a plurality of first small templates 11 along the depth direction of an inverted arch; the second turnover belly mold template 2 is formed by splicing a plurality of second small templates 21 along the depth direction of the inverted arch;
as shown in fig. 2, the length of the first turning belly mold template 1 of the light-weight overhead belly mold template provided by the embodiment of the invention is 11 m-20 m, and the embodiment of the invention is preferably 20m, and the light-weight overhead belly mold template is formed by splicing four first small templates 11; the length of the first small templates 11 is 3 m-7 m, and in the embodiment of the invention, the lengths of four first small templates 11 are preferably 5m; the length of the second turnover belly mold template 2 is 11 m-20 m, the length of the second turnover belly mold template is preferably 20m, and the second turnover belly mold template is formed by splicing four second small templates 21; the length of the second small template 21 is 3 m-7 m, and in the embodiment of the invention, the lengths of four second small templates 21 are preferably 5m.
Through the structure and the arrangement, the single template in the embodiment of the invention has small size, and is convenient for adjusting the fitting degree of the single template with a foundation pit; the occupation of the tunnel space can be reduced, and the influence on the construction of other work types in the tunnel can be reduced; meanwhile, the weight of the template is reduced, and the construction and the transportation are convenient; in addition, the embodiment of the invention does not provide a template in the middle of the inverted arch, so that a rough surface is naturally formed after the concrete in the middle of the inverted arch is poured, the adhesion of new and old concrete after the subsequent secondary concrete pouring process is facilitated, and the new and old concrete is formed into a whole; simultaneously, the first turnover belly mold plate and the longitudinal beam base, the second turnover belly mold plate and the first turnover belly mold plate are rotatably connected, when the mold plate is demolded, the mold plate turnover and retraction device drives the second turnover belly mold plate to turn upwards to demold, and then the second turnover belly mold plate further drives one side, connected with the first turnover belly mold plate, of the first turnover belly mold plate to turn upwards to demold; the demolding process of the template is simple and feasible, and a complex demolding device is omitted.
The individual components are described in more detail below.
As shown in fig. 2, the opposite sides of two adjacent first small templates 11 are provided with first flange plates 12; two adjacent first flange plates 12 are connected through bolts to form a first connecting unit 14; the first flange plates 12 are connected in pairs to splice a plurality of first small templates 11 into a first turnover belly mold template 1; the opposite side surfaces of two adjacent second small templates 21 are provided with second flange plates 22; two adjacent second flange plates 22 are connected through bolts to form a second connecting unit 24; the second flange plates 22 are connected in pairs to splice a plurality of second small templates 21 into a second turnover belly mold plate 2, and the second connecting units 24 of the second turnover belly mold plate 2 are arranged opposite to the first connecting units 14 of the first turnover belly mold plate 1 one by one; specifically, when the first small template 11 and the second small template 21 are manufactured, the first flange plate 12 and the second flange plate 22 are arranged in a one-to-one opposite manner; the bolt connection mode is convenient to assemble and disassemble; the second connecting units 24 are disposed one-to-one opposite to the first connecting units 14 so that the assembled lightweight inverted arch form structure is continuous.
In the construction process, the lengths of the first small form 11 and the second small form 21 can be adjusted according to the construction requirement, and the specific mode is exemplified by the first small form 11: cutting the whole first flange plate 12, cutting the first small template 11 to a required length, and connecting the first flange plate 12 with the cut first small template 11; preferably riveted.
As shown in fig. 2, the first small template 11 and the second small template 21 are provided with rib plates 7 in a longitudinal and transverse mode, and the rib plates 7 on the assembled light inverted arch die template form a longitudinal and transverse grid system; the rib plates 7 can enable the assembled light inverted arch die template structure to be continuous, become a stressed whole, and strengthen the rigidity and the impact resistance of the assembled light inverted arch die template.
As shown in fig. 2, each stringer base 3 is located laterally of a first connecting unit 14, and the two first flange plates 12 of the first connecting unit 14 are hinged to the stringer base 3 to which they are adjacent, preferably by means of a pin connection in the embodiment of the present invention; the first flange plates 12 of the plurality of first connection units 14 are connected with the longitudinal beam base 3 one by one through pin shafts so as to realize the sequential rotatable connection of the first turnover belly mold plate 3 and the longitudinal beam base 3, and all the connection positions are positioned on the same axis so that the first turnover belly mold plate 1 can rotate around the axis.
The two template overturning and retracting devices in the embodiment are all preferably chain-guiding type electric hoist 4; as shown in fig. 2 and 3, the body of each electric hoist 4 is connected to one longitudinal beam base 3, and the guide chains of all electric hoists 4 are connected to the second turnover belly mold 2; in the embodiment, a web die base cross beam 6 is arranged on the second turnover web die template 2 so as to be connected with a guide chain of the electric hoist 4; each belly mold base cross beam 6 is positioned at the side of the electric hoist 4 connected with the belly mold base cross beam and is connected with two second flange plates 22 of a second connecting unit 24 at the side of the electric hoist 4; as shown in fig. 4, the second flange plate 22 is provided with side wings, and the web base beam 6 is connected with the side wings of the two second flange plates 22; the web die base cross beam 6 is provided with a hole for a guide chain to pass through; the electric hoist 4 is connected with the abdomen mould base cross beams 6 one by one to realize the connection of the electric hoist 4 and the second turnover abdomen mould template 2.
As shown in fig. 2, the first flip-die plate 1 is provided with a plurality of first connection seats 13 at a side close to the second flip-die plate 2; the second turnover belly mold template 2 is provided with a second connecting seat 23 near each first connecting seat 13; the second connecting seat 23 is connected with the first connecting seat 13 which is close to the second connecting seat through the first pin shafts 5, and all the first pin shafts 5 are positioned on the same axis so as to realize rotatable connection of the second turnover belly mold plate 2 and the first turnover belly mold plate 1; specifically, as shown in fig. 5, the first and second turnover belly mold templates 1 and 2 are respectively provided with a rib plate 7 at one side close to each other, and the first and second connection seats 13 and 23 are respectively connected to the rib plate 7; the first connecting seat 13 and the second connecting seat 23 are triangular plate-shaped members, through holes are formed in the triangular plate-shaped members, the through holes in the first connecting seat 13 and the second connecting seat 23 are overlapped to form through holes, and the first pin shaft 5 passes through the through holes.
As shown in fig. 2 and 5, the attached concrete vibrator 8 is connected above the first and second turning web templates 1 and 2, and can be used for vibrating concrete in the subsequent process; the attached concrete vibrator 8 is located above the first and second connection units 14, 24, and the two first flange plates 12 at the first connection unit 14 are also provided with flanks, and the attached concrete vibrator 8 is connected to the flanks of the first and second flange plates 12, 22 by bolts.
The first small template 11 and the second small template 21 provided by the embodiment of the invention are made of plastic steel; compared with the traditional steel template, the shape adaptability is strong, and the fitting degree with the tunnel inverted arch steel bar layer is higher; and it has light weight, good toughness and lower cost.
When the light-weight upward-facing arch web die templates provided by the embodiment of the invention are utilized for tunnel inverted arch construction, one light-weight upward-facing arch web die template is respectively arranged at two sides of the inverted arch, and the light-weight upward-facing arch web die templates at two sides are preferably mirror-symmetrical by taking the central line of the inverted arch as a symmetry axis; during construction, the light inverted arch web form plates on two sides are assembled, and then concrete pouring is carried out, so that the concrete stress on two sides of the inverted arch is uniform during construction.
The construction method for tunnel inverted arch construction by using the light inverted arch form template provided by the embodiment of the invention comprises the following steps:
step one: manufacturing a single first small template 11 and a second small template 21; in the embodiment of the invention, plastic steel is used for manufacturing a single first small template 11 and a single second small template 21, and the first flange plates 12 of the first small template 11 and the second flange plates 22 of the second small template 21 are arranged oppositely one by one; the first small template 11 and the second small template 21 are provided with rib plates 7 in a longitudinal and transverse mode, so that the rib plates 7 of the assembled light upward arch belly mold template form a longitudinal and transverse grid system;
step two: splicing a first turnover belly mold template 1 and a second turnover belly mold template 2; splicing a plurality of first small templates 11 into a first turnover belly mold template 1; splicing a plurality of second small templates 21 into a second turnover belly mold template 2; taking the assembly of a first turnover belly mold template 1 as an example, sequentially tiling a plurality of first small templates 11 along the depth direction of a tunnel to align the first flange plates 12 of each first small template 11 in pairs, and connecting the first flange plates 12 in pairs by bolts to assemble the first turnover belly mold template 1; the second flip web template 2 is assembled in the same manner; the embodiment of the invention is characterized in that a web die base beam 6 is connected to the assembled second turnover web die template 2 and is used for being connected with a template turnover retraction device; meanwhile, the embodiment of the invention is characterized in that the upper parts of the assembled first turnover belly mold plate 1 and the assembled second turnover belly mold plate 2 are connected with an attached concrete vibrator 8, and the attached concrete vibrator is used for vibrating concrete in the subsequent process;
step three: one side of a first turnover belly mold plate 1 is connected with a longitudinal beam base 3, the other side of the first turnover belly mold plate is connected with a second turnover belly mold plate 2, and the first turnover belly mold plate 1 is attached to a bound steel bar layer below the first turnover belly mold plate; the concrete mode of connecting the first turnover belly mold template 1 and the longitudinal beam base 3 in the embodiment of the invention is as follows: positioning each longitudinal beam base 3 at the side of one first connecting unit 14, and hinging two first flange plates 12 at the first connecting unit 14 with the adjacent longitudinal beam base 3; the embodiment of the invention in which the first turnover belly mold template 1 and the second turnover belly mold template 2 are connected is that the through hole on the first connecting seat 13 is overlapped with the through hole on the second connecting seat 23 to form a through hole, and the through hole passes through the first pin shaft 5;
step four: one end of the template overturning and folding device is connected with the longitudinal beam base 3, and the other end is connected with the second overturning belly template 2; the concrete implementation of the embodiment of the invention is shown in fig. 6, wherein the template overturning and retracting device is an electric hoist 4, the main body of the electric hoist 4 is connected with a longitudinal beam base 3, and the guide chain of the electric hoist 4 is connected with a belly mold base cross beam 6 arranged on a second overturning belly mold template 2;
step five: the template overturning and retracting device drives the second overturning belly mold template 2 to overturn and put down so that the second overturning belly mold template 2 is attached to the bound steel bar layer below the second overturning belly mold template; completing a first light-weight upward arch belly mold template; an embodiment of the present invention is shown in fig. 6: the guide chain of the electric hoist 4 drives the second turnover belly mold template 2 to turn over and put down, so that the second turnover belly mold template 2 rotates around the first pin shaft 5 until the second turnover belly mold template is attached to the bound steel bar layer below the second turnover belly mold template;
step six: repeating the first to fourth steps by taking the center line of the inverted arch as a symmetry axis, and constructing a second inverted arch web die plate on one side of the inverted arch far away from the first inverted arch web die plate;
step seven: pouring inverted arch concrete; the specific implementation method of the embodiment of the invention is as follows: the attached concrete vibrator 8 uniformly stirs the concrete during concrete pouring;
step eight: after the concrete pouring is finished, the formwork overturning and retracting devices of the first upward arch web formwork and the second upward arch web formwork respectively drive the second overturning web formwork 2 to overturn upwards so as to demould the same; the second turnover belly mold template 2 further drives one side of the first turnover belly mold template 1 to tilt so as to release the mold; a specific implementation of an embodiment of the present invention is shown in fig. 6: for the first upward arched belly mold template and the second upward arched belly mold template, the electric hoist 4 drives the guide chain to drive the second turnover belly mold template 2 to turn upwards so as to demould; the second turnover belly mold template 2 further drives one side of the first turnover belly mold template 1 to tilt so as to be demolded.
After the steps one to eight are completed, trestle bridges on two sides of the tunnel inverted arch are utilized to pull the longitudinal beam bases 3 on two sides, the template overturning and retracting device, the first overturning belly mold template 1 and the second overturning belly mold template 2 to move forward to the next station along the depth direction of the tunnel, and then the steps five to eight are repeated for construction.
In summary, the assembled light-weight upward arched belly mold template and the construction method for tunnel inverted arch construction by using the light-weight upward arched belly mold template provided by the embodiment of the invention have the advantages that the size of a single template is small, the weight is light, the fit degree of the template and a foundation pit is convenient to adjust, the occupation of the template to the tunnel space can be reduced, and the construction and the transportation are convenient; the middle part of the inverted arch is not provided with a template, so that a rough surface is naturally formed after concrete in the middle part of the inverted arch is poured, the bonding of new and old concrete after the subsequent secondary concrete pouring process is facilitated, and the new and old concrete forms a whole; the demolding process of the template is simple and feasible, and a complex demolding device is omitted; the first small template and the second small template are convenient to assemble and disassemble; the plastic steel is adopted for manufacturing, the weight is light, the toughness is good, the plastic steel can be repeatedly used, and the rib plates are arranged to strengthen the rigidity and the impact resistance.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
1. A construction method for performing inverted arch construction by using a light upward arch web form is characterized in that,
the light inverted arch die template comprises a first inverted arch die template (1), a second inverted arch die template (2), a plurality of longitudinal beam bases (3) arranged along the depth direction of an inverted arch and at least one template overturning and retracting device; wherein,,
the longitudinal beam bases (3) are positioned on one side of the inverted arch; one side of the first turnover belly mold template (1) is sequentially and rotatably connected with the longitudinal beam bases (3), and all the connecting positions are positioned on the same axis, so that the first turnover belly mold template (1) can rotate around the axis; one side of the second turnover belly mold template (2) is rotatably connected with the other side of the first turnover belly mold template (1); one end of each template overturning and folding device is connected with a longitudinal beam base (3); the other ends of all the template overturning and retracting devices are connected with the second overturning abdominal template (2) so as to drive the second overturning abdominal template (2) to overturn; the first overturning abdominal mould template (1) is formed by splicing a plurality of first small templates (11) along the depth direction of the inverted arch; the second turnover abdominal mould template (2) is formed by splicing a plurality of second small templates (21) along the depth direction of the inverted arch,
the method comprises the following steps:
step one: manufacturing a single first small template (11) and a second small template (21);
step two: splicing a first turnover belly mold template (1) and a second turnover belly mold template (2);
step three: one side of a first turnover belly mold template (1) is connected with a longitudinal beam base (3), the other side of the first turnover belly mold template is connected with a second turnover belly mold template (2), and the first turnover belly mold template (1) is attached to a bound steel bar layer below the first turnover belly mold template;
step four: one end of the template overturning and folding device is connected with the longitudinal beam base (3), and the other end is connected with the second overturning belly template (2);
step five: the template overturning and retracting device drives the second overturning abdominal template (2) to overturn and put down so that the second overturning abdominal template (2) is attached to the bound steel bar layer below the second overturning abdominal template; completing a first light-weight upward arch belly mold template;
step six: repeating the first to fourth steps by taking the center line of the inverted arch as a symmetry axis, and constructing a second inverted arch web die plate on one side of the inverted arch far away from the first inverted arch web die plate;
step seven: pouring inverted arch concrete;
step eight: after the concrete pouring is finished, the formwork overturning and retracting devices of the first upward arch web formwork and the second upward arch web formwork respectively drive the second overturning web formwork (2) to overturn upwards so as to demould; the second turnover belly mold template (2) further drives one side of the first turnover belly mold template (1) connected with the second turnover belly mold template to tilt so as to be demolded.
2. The lightweight arched belly mold template for realizing the construction method according to claim 1, wherein the opposite side surfaces of two adjacent small first templates (11) are respectively provided with a first flange plate (12); two adjacent first flange plates (12) are connected through bolts to form a first connecting unit (14); the first flange plates (12) are connected in pairs to splice a plurality of first small templates (11) into a first turnover belly mold template (1).
3. A lightweight spandrel form as claimed in claim 2, wherein each of said stringer bases (3) is located laterally of one of said first connection units (14), the two first flange plates (12) of the first connection unit (14) being hinged to the stringer base (3) to which it is adjacent; the first flange plates (12) are hinged with the longitudinal beam bases (3) one by one so as to realize the rotatable connection of the first turnover abdomen mold plates (1) and the longitudinal beam bases (3) in sequence.
4. A lightweight spandrel die template as claimed in claim 3, characterised in that the opposite sides of two adjacent said second small templates (21) are each provided with a second flange plate (22); two adjacent second flange plates (22) are connected through bolts to form second connecting units (24), and the second connecting units (24) are arranged opposite to the first connecting units (14) one by one; the second flange plates (22) are connected in pairs to splice a plurality of second small templates (21) into a second turnover belly mold template (2).
5. A lightweight overhead arch form according to claim 4, wherein the second flip-over form (2) is provided with a form base cross member (6) for connection to an end of the form flip-over retraction device remote from the stringer base (3); each web die base cross beam (6) is positioned at the side of the template overturning and releasing device connected with the web die base cross beam and is connected with two second flange plates (22) of a second connecting unit (24) at the side of the template overturning and releasing device; the template overturning and retracting device is connected with the web die base cross beams (6) one by one so as to realize the connection of the template overturning and retracting device and the second overturning web die template (2).
6. The light-weight upward-arch belly mold template according to claim 5, wherein the template overturning and retracting device is an electric hoist (4); the main body of the electric hoist (4) is connected with the longitudinal beam base (3), and the guide chain of the electric hoist is connected with the abdomen mould base cross beam (6).
7. A lightweight overhead arch form according to claim 6, wherein the first flip-flop die form (1) is provided with a plurality of first connection seats (13) on a side adjacent to the second flip-flop die form (2); the second turnover abdomen mould template (2) is provided with a second connecting seat (23) close to each first connecting seat (13); the second connecting seat (23) is connected with the first connecting seat (13) which is close to the second connecting seat through the first pin shafts (5), and all the first pin shafts (5) are positioned on the same axis so as to realize rotatable connection of the second turnover belly mold plate (2) and the first turnover belly mold plate (1).
8. A lightweight spangle mould plate as claimed in claim 7, wherein the first small mould plate (11) and the second small mould plate (21) are provided with rib plates (7) in a longitudinal and transverse manner so that the rib plates (7) on the assembled lightweight spangle mould plate form a longitudinal and transverse grid system.
9. A lightweight spandrel mould plate as claimed in claim 8, characterised in that the first small mould plate (11) and the second small mould plate (21) are each made of plastics steel.
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| US4917538A (en) * | 1988-04-26 | 1990-04-17 | Shigetoshi Koga | Tunnel lining process and apparatus therefor |
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| JP3321702B2 (en) * | 1997-07-15 | 2002-09-09 | 日本ゼニスパイプ株式会社 | Construction method of concrete slab, structure of semi-PC slab for slab and concrete slab |
| JP2015081460A (en) * | 2013-10-23 | 2015-04-27 | 第一ビニール株式会社 | Concrete block molding form device, concrete block molding template, and concrete block manufacturing method |
| CN105649654B (en) * | 2016-03-17 | 2017-08-01 | 湖南五新模板有限公司 | Automatic hydraulic inverted arch trestle chassis and its construction method |
| CN106884664B (en) * | 2017-02-27 | 2020-02-21 | 中铁十九局集团有限公司 | Tunnel inverted arch template and tunnel inverted arch filling rapid construction method |
| CN109514818A (en) * | 2018-11-26 | 2019-03-26 | 台州市黄岩炜大塑料机械有限公司 | Thread bend pipe vertical rotating mold |
| CN112065454B (en) * | 2020-09-30 | 2023-03-17 | 湖南五新模板有限公司 | Inverted arch formwork and construction method thereof |
| CN112943303B (en) * | 2021-02-23 | 2022-11-01 | 中建桥梁有限公司 | Tunnel inverted arch construction method adopting hydraulic arc-shaped template |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3959423A (en) * | 1973-09-07 | 1976-05-25 | Gerald D. Hines Interests | Modular construction system |
| US4917538A (en) * | 1988-04-26 | 1990-04-17 | Shigetoshi Koga | Tunnel lining process and apparatus therefor |
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