CN114526090B - A tunnel construction method based on arc steel mold trolley - Google Patents
A tunnel construction method based on arc steel mold trolley Download PDFInfo
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- CN114526090B CN114526090B CN202210092889.5A CN202210092889A CN114526090B CN 114526090 B CN114526090 B CN 114526090B CN 202210092889 A CN202210092889 A CN 202210092889A CN 114526090 B CN114526090 B CN 114526090B
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- template
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- oil cylinder
- portal
- formwork
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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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- 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
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a tunnel construction method based on an arc steel mould trolley, which comprises a first portal, a second portal and a mould supporting mechanism, wherein the mould supporting mechanism comprises a template assembly, a first driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, the template assembly comprises an upper template and a first side template, two ends of the first driving oil cylinder are respectively hinged with the first side template and the first portal, two ends of the third driving oil cylinder are respectively hinged with one end of the upper template close to the first side template and one end of the first side template close to the upper template, and two ends of the adjusting screw rod can be respectively hinged with one end of the first portal and one end of the upper template far from the first side template; the third driving oil cylinder and the adjusting screw rod are connected, so that the first side template and the upper template can synchronously support and demould through the first driving oil cylinder and the third driving oil cylinder respectively, the demould difficulty is reduced, the demould efficiency is improved, and the efficiency of secondary lining construction of a tunnel is further improved.
Description
The application relates to a split application of '2021.12.31' on the application date, '202111679334.2' on the application name of 'circular arc steel mould trolley and a tunnel construction method adopting the same'.
Technical Field
The invention relates to the technical field of tunnels, in particular to a tunnel construction method based on a circular arc steel mould trolley.
Background
For tunnels with higher sealing requirements, secondary lining is needed after shield construction so as to meet the requirements of reinforcing support, sealing, waterproofing and the like. In the related art, the secondary lining construction of the tunnel generally needs to use a trolley for pouring in a matching way, and the formwork of the trolley is supported or demolded under the driving of an oil cylinder. However, the driving oil cylinders of the templates are easy to interfere with each other in the demolding process of the traditional trolley, so that the demolding difficulty is high, the demolding efficiency is low, the distance between the template and the inner wall of the tunnel is short after demolding, and the template is easy to collide with the inner wall of the tunnel in the process of moving the trolley.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the tunnel construction method based on the circular arc steel mould trolley can reduce demoulding difficulty and improve demoulding efficiency, so that the efficiency of secondary lining construction of the tunnel is greatly improved.
According to the tunnel construction method based on the arc steel mould trolley, the arc steel mould trolley comprises a first portal frame, a second portal frame and a mould supporting mechanism, lifting devices are arranged at two ends of the second portal frame along the front-rear direction, a first station and a second station are arranged on the second portal frame along the front-rear direction, and the first portal frame is movably sleeved on the second portal frame and can move between the first station and the second station; the formwork supporting mechanism comprises a formwork assembly, a first driving oil cylinder, a second driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, wherein the formwork assembly comprises an upper formwork, a first side formwork, a second side formwork and a lower formwork; the upper template, the first side template, the lower template and the second side template are sequentially connected and arranged around the first portal; the two ends of the first driving oil cylinder are respectively hinged with the first side template and the first portal frame, the two ends of the second driving oil cylinder are respectively hinged with the second side template and the first portal frame, and the two ends of the third driving oil cylinder are respectively hinged with one end of the upper template, which is close to the first side template, and one end of the first side template, which is close to the upper template; two ends of the adjusting screw rod can be respectively hinged to one ends of the first portal and the upper template far away from the first side template; in the front-rear direction, the length of the second portal is L 1, and the length of the template assembly is L 2, which satisfies the following conditions: l 1/L2 is more than or equal to 2; The construction method comprises the following steps: erecting a first steel bar net rack on the inner wall of the tunnel; the first portal moves from the first station to the second station; the lifting device drives the second door frame to descend to a first target position so as to enable the lower template to be matched with a part of the corresponding structure of the first steel bar net frame; the second driving oil cylinder drives the second side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack; the first driving oil cylinder drives the first side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack; the third driving oil cylinder drives the upper template to move to a position matched with a part of the structure corresponding to the first steel bar net rack; The adjusting screw rod is installed, and the position of the upper die plate is adjusted through the adjusting screw rod; pouring concrete between the template assembly and the inner wall of the tunnel; the lifting device retracts and breaks away from the supporting surface of the tunnel; the second door frame moves along the extending direction of the tunnel so as to enable the first door frame to be switched from the second station to the first station; the lifting device extends out and is supported on the supporting surface; disassembling the adjusting screw rod; the third driving oil cylinder drives the upper die plate to reset and demould; the first driving oil cylinder drives the first side template to reset and demould; the second driving oil cylinder drives the second side template to reset and demould; the lifting device drives the second portal to rise to a second target position so as to demould the lower template.
The tunnel construction method based on the arc steel mould trolley provided by the embodiment of the invention has at least the following beneficial effects:
In the secondary lining construction of the tunnel, the embodiment of the invention adopts the arc steel mould trolley to realize the integral casting of the secondary lining of the cylindrical tunnel section, and the arc steel mould trolley moves along the extending direction of the tunnel and then continuously casts the secondary lining of the remaining tunnel section; the circular arc steel mould trolley comprises a first portal, a second portal and a mould supporting mechanism, wherein the second portal is provided with a first station and a second station, the first portal is fixedly connected with the mould supporting mechanism and movably sleeved on the second portal, so that the position can be switched between the first station and the second station, the second portal is supported on the supporting surface of a tunnel, the mould supporting mechanism can complete working procedures such as mould supporting, pouring and forming on the second station under the driving of the first portal, and simultaneously the second portal is separated from the supporting surface before demoulding and moves along the extending direction of the tunnel, so that the mould supporting mechanism is switched to the first station, the second portal is supported on the supporting surface of the tunnel again, at the moment, the mould supporting mechanism completes demoulding on the first station, and moves to the second station again to realize working procedures such as mould supporting, pouring and forming of the second lining of the next section of the tunnel section, so as to realize the integral pouring of the second lining of the tunnel section. According to the embodiment of the invention, through the step-changing operation of the second portal frame and the formwork supporting mechanism, the integral pouring of the secondary lining of the tunnel sections is realized, and the construction efficiency of the secondary lining is improved. The formwork supporting mechanism comprises a formwork assembly, a first driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, wherein the formwork assembly comprises an upper formwork and a first side formwork, two ends of the first driving oil cylinder are respectively hinged with the first side formwork and the first portal, two ends of the third driving oil cylinder are respectively hinged with one end, close to the first side formwork, of the upper formwork and one end, close to the upper formwork, of the first side formwork, and two ends of the adjusting screw rod can be respectively hinged with one end, far away from the first side formwork, of the first portal and the upper formwork; the connection mode of the third driving oil cylinder and the adjusting screw rod enables the first side template and the upper template to realize synchronous formwork supporting and demoulding through the first driving oil cylinder and the third driving oil cylinder respectively, so that demoulding difficulty is reduced, demoulding efficiency is improved, and tunnel secondary lining construction efficiency is further improved; and the template component can be furled in the first portal under the demolding state, so that the first portal is effectively prevented from colliding with the inner wall of the tunnel in the moving process, and the construction safety is improved.
According to some embodiments of the invention, before the second portal moves along the direction of extension of the tunnel, it comprises: and erecting a second steel bar net rack on the inner wall of the extending direction of the tunnel.
According to some embodiments of the present invention, first supporting devices are respectively arranged at two ends of the first portal frame along the front-rear direction, the first supporting devices comprise a limiting cylinder and a first supporting beam, and two ends of the limiting cylinder are respectively connected with the first portal frame and the first supporting beam; before the concrete is poured between the template component and the inner wall of the tunnel, the method further comprises the following steps: the limiting oil cylinder drives the first supporting beam to be supported on the supporting surface of the tunnel; before the lifting device drives the second portal to rise to the second target position, the lifting device further comprises: the limiting cylinder retracts and is separated from the supporting surface.
According to some embodiments of the invention, after the first portal moves from the first station to the second station, the method further comprises: cleaning the outer surface of the template assembly.
According to some embodiments of the invention, the cleaning the outer surface of the template assembly comprises: cleaning concrete and curing agent on the outer surfaces of the upper template, the first side template, the second side template and the lower template; and coating release agents on the outer surfaces of the upper template, the first side template, the second side template and the lower template.
According to some embodiments of the present invention, the formwork supporting mechanism further includes a plurality of end formwork units, the plurality of end formwork units are circumferentially disposed at a front end portion of the formwork assembly along a moving direction of the formwork supporting mechanism, the end formwork units include a first baffle, a second baffle, a limiting member, a rotating member, a supporting rod and a limiting screw rod, the first baffle and the second baffle are disposed at intervals along a radial direction of the formwork assembly and form a communication port, the first baffle and the second baffle are connected through the limiting member, one end of the rotating member is fixedly connected with the first baffle and/or the second baffle, the other end of the rotating member is hinged with the formwork assembly, one end of the limiting screw rod is fixedly connected with the formwork assembly through the supporting rod, and the other end of the limiting screw rod is hinged with the first baffle or the second baffle; before the concrete is poured between the template component and the inner wall of the tunnel, the method further comprises the following steps: installing a plurality of limit screws, and supporting a plurality of end die units between the die plate assembly and the inner wall of the tunnel through the plurality of limit screws; before the lifting device drives the second portal to rise to the second target position, the lifting device further comprises: and removing a plurality of limit screws, and resetting the plurality of end module assemblies.
According to some embodiments of the invention, after the installing a plurality of the limit screws and supporting a plurality of the end form units between the form assembly and the inner wall of the tunnel by a plurality of the limit screws, the method further comprises: installing an embedded part between the template assembly and the inner wall of the tunnel through the communication port; and sealing the communication port by adopting a sealing strip.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of the overall structure of a circular arc steel mold trolley according to one embodiment of the invention;
FIG. 2 is a schematic diagram of formwork construction of an arc steel form trolley according to one embodiment of the invention;
FIG. 3 is a schematic drawing of the demolding construction of a circular arc steel mold trolley according to one embodiment of the invention;
FIG. 4 is a schematic drawing showing the shrinkage of the lifting device of the circular arc steel mold trolley according to one embodiment of the invention;
FIG. 5 is a cross-sectional view taken along the direction A-A in FIG. 4;
FIG. 6 is an enlarged view at B in FIG. 5;
FIG. 7 is a schematic view of a lifting device of a circular arc steel mold trolley according to an embodiment of the invention;
FIG. 8 is an exploded view of a second support device for a circular arc steel form trolley according to one embodiment of the present invention;
FIG. 9 is a schematic diagram of a synchronous loop of a circular arc steel form trolley according to one embodiment of the invention;
FIG. 10 is a schematic view of an adjusting screw structure of a circular arc steel mold trolley according to an embodiment of the invention;
FIG. 11 is an exploded view of an adjusting screw of a circular arc steel form trolley according to one embodiment of the present invention;
FIG. 12 is a schematic view of the construction of a first side form of a circular arc steel form pallet of an embodiment of the present invention;
FIG. 13 is a schematic view of a first side form of a circular arc steel pallet from another perspective according to one embodiment of the present invention;
FIG. 14 is a schematic diagram of an end die unit of a circular arc steel die trolley according to an embodiment of the invention;
FIG. 15a is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to one embodiment of the present invention;
FIG. 15b is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to one embodiment of the present invention;
FIG. 16 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 17 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 18 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 19 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 20 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 21 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
FIG. 22 is a flow chart of a tunnel construction method based on a circular arc steel form trolley according to another embodiment of the present invention;
fig. 23 is a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that references to orientation descriptions, such as directions of up, down, left, right, etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.
In the description of the present invention, plural means two or more, and exceeding or the like is understood to exclude this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1, fig. 2 and fig. 5, an overall structure schematic diagram of a circular arc steel mold trolley 1000 according to an embodiment of the present invention may be used for lining a tunnel, especially for secondary lining after primary support of the tunnel. The circular arc steel form pallet 1000 includes a second gantry 100, a first gantry 200, and a formwork mechanism 300. The lifting devices 110 are disposed at the front and rear ends of the second door frame 100, and are used for driving the second door frame 100 to rise or fall, so as to drive the first door frame 200 and the formwork mechanism 300 to rise or fall. The second door frame 100 is partially inserted through the first door frame 200, and the second door frame 100 and the first door frame 200 can move relatively. When the second door frame 100 supports the first door frame 200, the first door frame 200 can move in the front-rear direction of the second door frame 100; when the first mast 200 supports the second mast 100, referring to fig. 4, the elevating device 110 is retracted to be separated from the supporting surface of the tunnel, and the second mast 100 can be moved in the front-rear direction of the first mast 200, and the movement of the circular arc steel mold trolley 1000 is realized by the form of mutual support. It should be noted that, the relative movement of the second door frame 100 and the first door frame 200 may be performed by a motor driving a gear, the gear and the rack being matched, or may be performed by a winch driving a wire rope, which is not particularly limited in the present invention. The second door frame 100 and the first door frame 200 may be matched in a ball and chute mode or in a guide wheel 220 and guide rail 130 mode, and the guide wheel 220 is matched with the guide rail 130 mode in the following description for illustration.
Referring to fig. 2 and 3, fig. 2 is a schematic diagram of a formwork of the circular arc steel mold trolley 1000, fig. 3 is a schematic diagram of demolding of the circular arc steel mold trolley 1000, section lines in fig. 2 and 3 are poured concrete, and the outer side of the concrete is a duct piece. The formwork mechanism 300 includes a formwork assembly 310, a first drive cylinder 320, a second drive cylinder 330, and a third drive cylinder 340. The stencil assembly 310 includes an upper stencil 311, a first side stencil 312, a lower stencil 313, and a second side stencil 314 that are disposed sequentially around the first portal 200. The upper template 311, the first side template 312, the lower template 313 and the second side template 314 are hinged through bolts in sequence, the upper template 311 is located above the first portal 200, the first side template 312 and the second side template 314 are located on the left side and the right side of the first portal 200 respectively, and the lower template 313 is located below the first portal 200 and fixedly connected with the first portal 200. The formwork component 310 is used for enclosing a casting area with the wall surface of the tunnel, so that the shaping of concrete is facilitated.
Referring to fig. 4, one end of the first driving cylinder 320 is hinged with the first side mold plate 312, and the other end of the first driving cylinder 320 is hinged with the first portal 200; one end of the second driving oil cylinder 330 is hinged with the second side template 314, and the other end of the second driving oil cylinder 330 is hinged with the first portal 200; one end of the third driving oil cylinder 340 is hinged to one end of the upper template 311 close to the first side template 312, the other end of the third driving oil cylinder 340 is hinged to one end of the first side template 312 close to the upper template 311, and the third driving oil cylinder 340 can drive the upper template 311 and the second side template 314 to be connected with or separated from each other. The first drive cylinder 320, the second drive cylinder 330 and the third drive cylinder 340 are each configured to drive the corresponding mold plate assembly 310 to be moved closer to the first gantry 200 for demolding or away from the first gantry 200 for formwork support.
Referring to FIG. 5, the second mast 100 has a length L1 in the fore-aft direction and the stencil assembly 310 has a length L2, L1 and L2 satisfying L1/L2. Gtoreq.2. It will be appreciated that the formwork assembly 310 needs to be moved in a fore-aft direction of the second mast 100 to effect different positions of the casting tunnel, and therefore the length of the second mast 100 needs to be greater than or equal to twice the length of the formwork assembly 310 to enable smooth movement of the formwork assembly 310 to effect demolding.
Referring to fig. 2, the formwork mechanism 300 further includes a first adjusting screw 350, a second adjusting screw 360, and a third adjusting screw 370, the upper mold plate 311 is hinged to the first portal 200 through the first adjusting screw 350, the first side mold plate 312 is hinged to the first portal 200 through the second adjusting screw 360, and the second side mold plate 314 is hinged to the first portal 200 through the third adjusting screw 370. One end of the first adjusting screw 350 is hinged to one end of the upper template 311 away from the first side template 312, and the other end of the first adjusting screw 350 is hinged to the first portal 200. The first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 are used for adjusting the positions of the corresponding template assemblies 310, and after the positions of the template assemblies 310 are determined, the first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 can be used for supporting the template assemblies 310, so that the positions of the template assemblies 310 can be limited, and the template assemblies 310 can be positioned at the proper pouring positions.
Referring to fig. 10 and 11, the first adjusting screw 350 includes a first screw 351, a first nut 352, a second nut 353, a second screw 354, and an adjusting sleeve 355, wherein the first screw 351 and the second screw 354 are respectively screwed to two ends of the adjusting sleeve 355, the first nut 352 is screwed to the first screw 351 to limit the relative rotation of the first screw 351 and the adjusting sleeve 355, and the second nut 353 is screwed to the second screw 354 to limit the relative rotation of the second screw 354 and the adjusting sleeve 355. The position of the stencil assembly 310 is adjusted by rotating the adjustment sleeve 355 to change the entire length of the first adjustment screw 350, and the length of the first adjustment screw 350 is fixed by the first nut 352 and the second nut 353 after the position of the stencil assembly 310 is determined, thereby fixing the position of the stencil assembly 310. It should be noted that the structures of the second adjusting screw 360 and the third adjusting screw 370 are substantially the same as those of the first adjusting screw 350, and the structures of the second adjusting screw 360 and the third adjusting screw 370 may be understood with reference to the structures of the first adjusting screw 350.
Referring to fig. 2, the upper die plate 311 is abutted against the second side die plate 314 during the die supporting process, and a rubber gasket is provided on the wall surface of the second side die plate 314 abutted against the upper die plate 311, so that abrasion can be reduced, the second side die plate 314 and the upper die plate 311 can be fixedly connected by bolts or bolts after the abutting, and the position of the upper die plate 311 can be limited only by the first adjusting screw 350. In the demolding process, referring to fig. 3, if a bolt or a bolt is disposed between the upper mold plate 311 and the second side mold plate 314, the bolt or the bolt needs to be disassembled first, the first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 need to be disassembled, the first driving oil cylinder 320, the second driving oil cylinder 330 and the third driving oil cylinder 340 are controlled to drive the corresponding mold plate assembly 310 to demold, the upper mold plate 311 is separated from the second side mold plate 314 after demolding, and other mold plates are still hinged. Lower die plate 313 requires lifting of lifting device 110 to raise the height of die plate assembly 310 to effect stripping.
Referring to fig. 3, the first support 210 is hidden for ease of viewing. In order to enable the upper die plate 311, the first side die plate 312, and the second side die plate 314 to be closer to the first portal 200 during the demolding, a third driving cylinder 340 is provided on the upper die plate 311 and the first side die plate 312. It can be appreciated that, if the third driving cylinder 340 is connected to the first portal frame 200 during the demolding process, the length of the third driving cylinder 340 is long due to the longer distance from the upper die plate 311 to the first portal frame 200, resulting in a decrease in rigidity, and easy vibration and unstable driving during the driving process; when the third driving oil cylinder 340 is contracted to perform demolding, if the first driving oil cylinder 320 is also contracted to perform demolding, under the condition of unstable control, a certain template is easy to be damaged due to the fact that the template is fast or slow, in order to reduce the occurrence of the situation, the third driving oil cylinder 340 is required to drive the upper template 311 to perform demolding first, and the first driving oil cylinder 320 can only perform driving to perform demolding; the third driving cylinder 340 has a limited deflection angle due to its limited length, and limits the approach of the upper die plate 311, the first side die plate 312, and the second side die plate 314 to the first portal 200.
The third driving oil cylinder 340 is arranged on the upper die plate 311 and the first side die plate 312, so that the problems can be reduced, and the upper die plate 311 is adjacent to the first side die plate 312, so that the length of the third driving oil cylinder 340 is shorter than that of the third driving oil cylinder 340 when the third driving oil cylinder 340 is arranged on the first portal frame 200, the rigidity is better, the occurrence of vibration can be reduced, and the driving stability is improved; the third driving oil cylinder 340 can work with the first driving oil cylinder 320 at the same time, the two are not mutually influenced, and the demolding or formwork supporting efficiency can be improved; in the demolding process, the influence of the third driving oil cylinder 340 on the overall rotation position of the template is small, so that the template can be closer to the first portal 200, and the condition that the formwork supporting mechanism 300 collides with the inner wall of a tunnel or a reinforcing steel bar in the moving process can be reduced.
Referring to fig. 1, in some embodiments, the upper die plate 311, the first side die plate 312, and the second side die plate 314 each include an arcuate plate 3121 and a plurality of stiffener plates 3122. Referring specifically to fig. 12 and 13, a first side template 312 is illustrated. The inner wall surface of the arc plate 3121 is provided with a plurality of reinforcing rib plates 3122 at intervals in a staggered manner, so as to improve the overall strength of the arc plate 3121, reduce the deformation of the arc plate 3121 and improve the stability thereof. Wherein the arcuate plate 3121 is integrally formed. It will be appreciated that the arcuate plate 3121 is integrally formed with a good surface quality, a smooth and flat surface, and a smooth and flat surface of the concrete structure upon demolding. If the first side template 312 is formed by splicing a plurality of pieces, stress concentration is easy at the splicing position, so that the first side template 312 is deformed, and the pouring effect is affected; and the arc 3121 may be integrally formed and aged after manufacture to reduce stress concentration.
In some embodiments, arcuate plate 3121 is formed from manganese steel, which is a high strength steel that is primarily intended to withstand severe conditions such as impact, extrusion, material wear, and the like, and which has excellent alkali and corrosion resistance. It will be appreciated that the concrete is generally alkaline and readily corrodes the arcuate plate 3121, and that the use of manganese steel for the arcuate plate 3121 reduces corrosion of the arcuate plate 3121.
Referring to fig. 9, in some embodiments, in order to improve the driving synchronicity of the first driving cylinder 320, a plurality of first driving cylinders 320 are connected by a synchronization valve (the second driving cylinder 330 and the third driving cylinder 340 are also connected by the synchronization valve to ensure the driving synchronicity, and the structure and the function are substantially similar to those of the first driving cylinder 320, and the first driving cylinder 320 is exemplified. The synchronous valves are typically a diverter valve and a diverter and collector valve 420. Taking the current and current dividing valve 420 as an example, the current and current dividing valve 420 can enable the first driving oil cylinder 320 to be synchronous bidirectionally, the current and current dividing valve 420 can also be used for a synchronous loop 400 with larger load phase difference, speed synchronization can be ensured when the load is completely off-load, and synchronization accuracy is higher. Wherein the synchronization circuit 400 refers to two or more hydraulic actuators operating synchronously with the same displacement or the same speed (or fixed speed ratio) in a hydraulic system.
Referring to fig. 9, taking driving two first driving cylinders 320 as an example, when the reversing valve 440 is connected to the left loop, the hydraulic oil of the hydraulic pump 460 is divided into two equal amounts of hydraulic oil by the flow dividing and collecting valve 420 and enters the first driving cylinders 320, so that the first driving rods of the two cylinders rise synchronously; when the right position of the reversing valve 440 is connected with the loop, the flow distributing and collecting valve 420 plays a role of collecting flow to control the two cylinders to synchronously descend. The hydraulic check valve 410 in the circuit is used to prevent the two first driving cylinders 320 from moving due to different loads when the stroke stops. If a certain first driving cylinder 320 reaches the end of travel, oil can be drained through the throttle hole in the one-way throttle valve 430, so that each cylinder can reach the end, and accumulated errors are eliminated. Wherein the relief valve 450 provides safety protection and relieves pressure when the pressure exceeds a threshold. The synchronization circuit 400 enables the actuation of the first actuation cylinder 320 to remain synchronized, reducing distortion of the stencil assembly 310.
Referring to fig. 5 and 6, in some embodiments, the second door frame 100 includes guide rails 130, the guide rails 130 extend along the front-rear direction of the second door frame 100, two guide rails 130 are provided at each of the upper and lower ends of the second door frame 100 at intervals, the first door frame 200 includes guide wheel sets, two guide wheel sets corresponding to the positions of the guide rails 130 are provided at each of the upper and lower ends of the first door frame 200 at intervals, each guide wheel set includes a plurality of guide wheels 220, and the guide wheels 220 are provided at intervals along the extending direction of the guide rails 130. The guide rail 130 and the guide wheel 220 are matched to roll, so that the second door frame 100 and the first door frame 200 can slide relatively.
It should be noted that the number of the guide rails 130 may be three, four or other numbers, and is selected according to actual requirements; other numbers of guide wheels 220 are possible, and are selected according to actual requirements. In some embodiments, the guide rail 130 may be disposed on the first door frame 200, and the guide pulley 220 may be disposed on the second door frame 100.
Referring to fig. 3,4 and 5, the first portal 200 further includes a first supporting device 210, and both front and rear ends of the first portal 200 are provided with the first supporting device 210. It can be understood that the circular arc steel mold trolley 1000 is supported in the tunnel basically by self gravity, and concrete easily jacks up the circular arc steel mold trolley 1000 in the pouring process, so that the position of the circular arc steel mold trolley 1000 is changed, and the pouring effect is affected. Thus, the first support device 210 is used to fix the position of the circular arc steel mold dolly 1000. The first supporting device 210 comprises a first supporting beam 211 and two limiting oil cylinders 212, the two limiting oil cylinders 212 are arranged at the left side and the right side of the first portal frame 200 at intervals, the output ends of the two limiting oil cylinders are fixedly connected with the first supporting beam 211, and the shape of the first supporting beam 211 is matched with the shape of the wall surface of a tunnel or the shape of a steel bar net rack. The limiting cylinder 212 drives the first supporting beam 211 to be abutted with the tunnel wall surface or steel bars fixed on the tunnel wall surface along the vertical direction so as to limit the position of the circular arc steel mould trolley 1000, reduce the problem that the circular arc steel mould trolley 1000 is jacked up, and improve the stability of the circular arc trolley.
Referring to fig. 7 and 8, the lifting device 110 includes two legs 111, each leg 111 includes a fixing member 1111, a lifting cylinder 1112, a guide 1114 and a sliding member 1113, the fixing member 1111 is fixedly connected with the guide 1114, a cavity is formed inside the guide 1114, the sliding member 1113 is disposed in the cavity, one end of the lifting cylinder 1112 is connected with the fixing member 1111, and the other end of the lifting cylinder 1112 is connected with the sliding member 1113, so that the sliding member 1113 can slide along an axial direction of the guide 1114, and further the second door frame 100 is driven to move in a vertical direction.
With continued reference to fig. 7 and 8, the second gantry 100 further includes a second support device 120, and both front and rear ends of the second gantry 100 are provided with the second support device 120, and the second support device 120 is connected to the two legs 111, for driving the circular arc steel mold trolley 1000 to shift to the left or right. The second supporting device 120 comprises a connecting piece 121, a second supporting beam 123 and an adjusting oil cylinder 122, wherein the connecting piece 121 comprises a plurality of channel steel 1211 and a plurality of connecting rib plates 1212, the plurality of channel steel 1211 are sequentially connected and enclosed into a cavity, and part of channel steel 1211 is fixedly connected with the supporting leg 111 through the connecting rib plates 1212. The adjusting cylinder 122 is disposed in a cavity enclosed by the channel steel 1211, one end of the adjusting cylinder 122 is connected with the channel steel 12111, and the other end is connected with the second supporting beam 123. The leg 111 is provided with a moving member 112, and the cross section of the moving member 112 is in an "L" shape. There are four moving members 112, one moving member 112 is provided for each leg 111 in the front-rear direction (the aforementioned "four, two" are only some embodiments of the present invention, but there may be other numbers, for example, eight moving members 112, four for each leg 111, which is selected according to the actual situation), and the second support beam 123 is slidably connected to the leg 111 through the moving member 112. It can be appreciated that when the tunnel turns, the position of the circular arc steel mold trolley 1000 needs to be adjusted, the second support beam 123 is abutted against the inner wall of the tunnel, and the circular arc steel mold trolley 1000 can be integrally offset under the driving of the adjusting oil cylinder 122, so that the transverse position of the circular arc steel mold trolley 1000 is adjusted.
Referring to fig. 8, a partition plate 124 is disposed on the second support beam 123, the partition plate 124 is disposed between the second support beam 123 and the support leg 111 and is fixedly connected to the second support beam 123, and the partition plate 124 is used for reducing the contact area between the second support beam 123 and the support leg 111, thereby reducing friction force, improving smoothness of sliding and reducing seizing. In some embodiments, the spacer 124 has a long strip shape and is disposed along the extending direction of the second support beam 123. Two partition plates 124 are respectively arranged at two ends of the second support beam 123, so that shaking of the second support beam 123 can be reduced. It should be noted that the partition 124 may also have other shapes, such as a cylinder, an ellipse, etc. The partition 124 may also be other numbers, such as six, eight, etc.
Referring to fig. 4, the formwork mechanism 300 further includes an end formwork unit 500, wherein the end formwork unit 500 is disposed at an end of the movement direction of the formwork assembly 310, and the end formwork unit 500 has a plurality of pieces and is disposed around the formwork assembly 310. The end form unit 500 is used to form a closed space with the form assembly 310 and the tunnel wall surface to cast concrete. It will be appreciated that, during the first pouring process of the tunnel, the front and rear ends of the formwork assembly 310 are provided with the end formwork units 500 to pour the first reinforced concrete structure, and after the pouring is completed, the first reinforced concrete structure can act as the end formwork unit 500, so that the end of the formwork assembly 310 close to the reinforced concrete structure does not need to be provided with the end formwork unit 500, and only the end of the formwork assembly 310 far from the reinforced concrete structure, that is, the end of the formwork assembly 310 in the moving direction, needs to be provided with the end formwork unit 500. The moving direction refers to the advancing direction of the circular arc steel mold carriage 1000 during the construction operation.
Specifically, referring to fig. 14, the end mold unit 500 includes a first barrier 510, a second barrier 520, a stopper 530, a rotator 540, a support rod 550, and a stopper screw 560. The first baffle 510 and the second baffle 520 are disposed at intervals along the radial direction of the formwork assembly 310, and a gap is formed at intervals, through which an embedded part can be placed, thereby improving construction efficiency. The first baffle 510 and the second baffle 520 are connected by the limiting members 530, and the limiting members 530 are two, so that the connection between the first baffle 510 and the second baffle 520 is more stable. After the embedded part is arranged, gaps are required to be blocked by rubber strips and the like, then foam rubber is smeared to improve the sealing effect, and the limiting part 530 is used for preventing the rubber strips from falling off, so that the effect of limiting the positions of the rubber strips is achieved. The first baffle 510 and the second baffle 520 are further connected through a rotating member 540, one end of the rotating member 540 is fixedly connected with any one of the first baffle 510 and the second baffle 520, and the other end of the rotating member 540 is hinged with the die plate assembly 310, so that the end die unit 500 can be rotatably connected with the die plate assembly 310, and demolding or die supporting is realized. In order to fix the position of the end form unit 500 when the end form unit 500 supports the form, a limit screw 560 is further provided. One end of the supporting rod 550 is fixedly connected with the template assembly 310, the other end of the supporting rod 550 is hinged with one end of the limiting screw 560, the other end of the limiting screw 560 is hinged with any one of the first baffle 510 and the second baffle 520, and the position of the end template unit 500 is adjusted by adjusting the length of the limiting screw 560. Note that, the structure of the limit screw 560 may refer to the structure of the first adjusting screw 350.
According to the arc steel mould trolley provided by the embodiment of the invention, the second door frame is provided with the first station and the second station along the front-back direction, and the first door frame is movably sleeved on the second door frame and can move between the first station and the second station. The first station is located at the rear end in the front-rear direction, and the second station is located at the front end in the front-rear direction. The first station and the second station are the positions of the formwork mechanism during pouring, and the first portal can drive the formwork mechanism to reciprocate on the second portal, so that the positions of the first station and the second station are switched.
Referring to fig. 15a and 15b, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to an embodiment of the present invention specifically includes the following steps:
S1501: and erecting a first steel bar net rack on the inner wall of the tunnel. The first steel bar net rack is bound in the segment of the tunnel through steel bars, and the first steel bar net rack is bound according to the design of the secondary lining of the tunnel.
S1502: the first portal moves from the first station to the second station. The first door frame can be matched with the steel wire rope through the winch or matched with the rack through the motor to realize relative movement with the second door frame, and the relative movement is not limited in detail.
S1503: the lifting device drives the second door frame to descend to the first target position so that the lower template is matched with a part of the corresponding structure of the first steel bar net frame. The first target position refers to the height position of the second portal, so that the first portal is lowered to the height position ready for construction, i.e. the position where the lower template is matched with the corresponding part of the structure of the first reinforcing steel bar net frame.
S1504: the second driving oil cylinder drives the second side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack.
S1505: the first driving oil cylinder drives the first side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack.
S1506: the third driving oil cylinder drives the upper template to move to a position matched with a part of the structure corresponding to the first steel bar net rack. It should be noted that, step 1505 and step 1506 may be performed synchronously, or sequentially, or alternatively, according to the actual working conditions, so as to realize the formwork supporting of the upper template and the first side template.
S1507: and installing an adjusting screw rod, and adjusting the position of the upper die plate through the adjusting screw rod. Because the two ends of the third driving oil cylinder are respectively hinged with the first side template and the upper template, when the third driving oil cylinder is not driven in place, the whole length of the third driving oil cylinder can be changed by adjusting the screw rod so as to adjust the distance between the upper template and the inner wall of the tunnel, and therefore the upper template is moved to a position more suitable for pouring.
S1508: concrete is poured between the formwork assembly and the inner wall of the tunnel to form a reinforced concrete structure. It can be appreciated that the pouring openings are formed in the template assembly, and the pouring openings can be formed in a plurality of pouring openings at intervals according to requirements. Opening the pouring opening and pouring concrete through the pouring opening during pouring, closing the corresponding pouring opening when the liquid level of the concrete is about to reach the pouring opening, and replacing the pouring opening with a higher position for pouring. The vibrator can be arranged in the pouring process to reduce the formation of bubbles in the concrete, so that the pouring quality is improved.
S1509: the lifting device retracts and breaks away from the supporting surface of the tunnel. When the reinforced concrete structure reaches the expected strength, the lifting device retracts, the first portal supports the second portal at the moment, and the condition that the lifting device collides with the inner wall of the tunnel in the moving process of the second portal can be reduced by retracting the lifting device.
S1510: the second gantry moves in the direction of extension of the tunnel to switch the first gantry from the second station to the first station. The second portal moves forward to facilitate the forward movement of the first portal in the subsequent step, so that the integral movement of the circular arc steel mould trolley is realized, namely, the first portal moves from one tunnel section to the next tunnel section.
S1511: the lifting device extends out and is supported on the supporting surface. The second door frame supports the first door frame at this time, so that the first door frame can move forward in the subsequent steps conveniently.
S1512: and (5) disassembling the adjusting screw rod. It will be appreciated that the adjustment screw needs to be removed prior to stripping the die plate assembly to prevent the adjustment screw from affecting the rotation of the upper die plate.
S1513: and the third driving oil cylinder drives the upper die plate to reset and demould.
S1514: the first driving oil cylinder drives the first side template to reset and demould.
It should be noted that, step 1513 and step 1514 may be performed synchronously, or sequentially, or alternatively performed according to an actual working condition, so as to implement demolding of the upper template and the first side template.
S1515: and the second driving oil cylinder drives the second side template to reset and demould.
S1516: the lifting device drives the second portal to rise to a second target position so as to demould the lower template. The second target position is the height position of the second portal, and the second portal rises to drive the first portal to rise, so that the template component is driven to rise, and the lower template is demoulded.
In the secondary lining construction of the tunnel, the construction method adopts the arc steel mould trolley to realize the integral casting of the secondary lining of the cylindrical tunnel section, and the arc steel mould trolley moves along the extending direction of the tunnel and then casts the remaining secondary lining of the tunnel section; the circular arc steel mould trolley comprises a first portal, a second portal and a mould supporting mechanism, wherein the second portal is provided with a first station and a second station, the first portal is fixedly connected with the mould supporting mechanism and movably sleeved on the second portal, so that the position can be switched between the first station and the second station, the second portal is supported on the supporting surface of a tunnel, the mould supporting mechanism can complete working procedures such as mould supporting, pouring and forming on the second station under the driving of the first portal, and simultaneously the second portal is separated from the supporting surface before demoulding and moves along the extending direction of the tunnel, so that the mould supporting mechanism is switched to the first station, the second portal is supported on the supporting surface of the tunnel again, at the moment, the mould supporting mechanism completes demoulding on the first station, and moves to the second station again to realize working procedures such as mould supporting, pouring and forming of the second lining of the next section of the tunnel section, so as to realize the integral pouring of the second lining of the tunnel section. According to the embodiment of the invention, through the step-changing operation of the second portal frame and the formwork supporting mechanism, the integral pouring of the secondary lining of the tunnel sections is realized, and the construction efficiency of the secondary lining is improved. The construction method adopts the arc steel mould trolley, the mould supporting mechanism comprises a mould assembly, a first driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, the mould assembly comprises an upper mould plate and a first side mould plate, two ends of the first driving oil cylinder are respectively hinged with the first side mould plate and a first portal frame, two ends of the third driving oil cylinder are respectively hinged with one end of the upper mould plate, which is close to the first side mould plate, and one end of the first side mould plate, which is close to the upper mould plate, and two ends of the adjusting screw rod can be respectively hinged with one end of the first portal frame and one end of the upper mould plate, which is far from the first side mould plate; the first side template and the upper template can be synchronously regulated through the first driving oil cylinder and the third driving oil cylinder respectively, so that the formwork supporting and the demoulding efficiency is improved, the first side template and the upper template cannot interfere with each other during synchronous demoulding, the demoulding difficulty is reduced, and the efficiency of secondary lining construction of a tunnel is further improved; and the template component can be furled in the first portal under the demolding state, so that the first portal is effectively prevented from colliding with the inner wall of the tunnel in the moving process, and the construction safety is improved.
Referring to fig. 16, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention, before step S1510, includes the following steps:
S1601: and erecting a second reinforcing steel bar net rack on the inner wall of the extending direction of the tunnel. The second steel bar net rack is bound in the segment of the tunnel through steel bars, and the second steel bar net rack is bound according to the design of the secondary lining of the tunnel. Step S1601 is generally disposed between steps S1508 and S1509, and in the process of waiting for the reinforced concrete to reach the desired strength, a worker may continue to construct the reinforcing steel bar net frame for secondary lining of the next section of tunnel segment, thereby shortening the downtime and improving the construction efficiency of secondary lining of the tunnel.
Referring to fig. 17, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention includes the following steps before step S1508:
S1701: the limiting oil cylinder drives the first supporting beam to be supported on the supporting surface of the tunnel. Step S1701 is generally disposed between steps S1507 and S1508, or may be disposed between steps S1503 and S1504, where a force is applied to the inner wall of the tunnel by the first support beam, so that the first portal and the formwork mechanism can be positioned more accurately with respect to the inner wall of the tunnel, and the first portal and the formwork mechanism are prevented from slipping to affect the pouring quality when the formwork assembly and the inner wall of the tunnel are poured with concrete.
Referring to fig. 18, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention includes the following steps before step S1516:
S1801: the limiting cylinder retracts and breaks away from the supporting surface. Step S1801 is generally disposed between steps S1515 and S1516, or may be disposed between steps S1511 and S1512, and after the reinforced concrete reaches the desired strength, the formwork assembly is demolded from the reinforced concrete, and since the lower formwork demolding requires the lifting device to drive the second portal to lift, so as to drive the first portal and the formwork assembly to lift, the limiting cylinder needs to retract, so as to ensure that the limiting cylinder does not interfere with the movement of the lifting device.
Referring to fig. 19, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention, step S1502 includes the following steps:
S1901: the outer surface of the stencil assembly is cleaned. The surface of template subassembly can exist the material that more influences the drawing of patterns after many times drawing of patterns, can improve the effect of drawing of patterns through wasing, carries out the washing of template subassembly when formwork mechanism removes the position to the second station moreover, and operating space is bigger, and the workman washs more conveniently, has improved cleaning efficiency. In addition, in order to further improve abluent convenience and the security of workman, can not erect the second reinforcing bar rack at the inner wall of the extending direction of tunnel earlier, but move the formwork mechanism to the second station earlier and carry out the washing of template subassembly, return to first station after wasing, carry out the erection of second reinforcing bar rack again, continue to carry out the pouring of the two lining of next section tunnel segmentation after the second reinforcing bar rack is erect and is accomplished.
Referring to fig. 20, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention, step S1901 specifically includes the following steps:
s2001: and cleaning the concrete and curing agent on the outer surfaces of the upper template, the first side template, the second side template and the lower template.
S2002: and coating release agents on the outer surfaces of the upper template, the first side template, the second side template and the lower template.
The efficiency of demoulding can be improved by cleaning the curing agent and the concrete on the outer surfaces of the upper template, the first side template, the second side template and the lower template. And after cleaning, the release agent is smeared according to actual conditions, so that the adhesion of concrete after subsequent pouring can be reduced, and the flatness of the inner surface of the secondary lining of the tunnel after demoulding is improved.
Referring to fig. 21, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention includes the following steps before step S1508:
s2101: and installing a plurality of limit screws, and supporting a plurality of end die units between the die plate assembly and the inner wall of the tunnel through the plurality of limit screws. Before pouring concrete, the end mould unit is supported and blocked by the limiting screw rod from flowing out of the end part of the template assembly, and the structure of the end mould unit is beneficial to improving the formwork supporting efficiency and improving the pouring quality of the secondary lining.
Referring to fig. 22, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention includes the following steps before step S1516:
S2201: and removing the plurality of limit screws and resetting the plurality of end module assemblies. After the reinforced concrete reaches the expected strength, the end die unit can be conveniently reset by dismantling the limiting screw rod, so that the demolding efficiency is improved, and the die is conveniently supported when the two liners of the next section of tunnel section are poured.
Referring to fig. 23, a flowchart of a tunnel construction method based on a circular arc steel mold trolley according to another embodiment of the present invention, step S2201 is followed by the steps of:
s2301: and the embedded part is installed between the template assembly and the inner wall of the tunnel through the communication port.
S2302: and sealing the communication opening by adopting a sealing strip.
It can be understood that after the end mould unit supports, can place the built-in fitting through the intercommunication mouth, place the efficiency of construction of built-in fitting through the intercommunication mouth and can improve the built-in fitting, reduce the construction degree of difficulty of built-in fitting. After the embedded part is constructed, the communication port can be sealed through sealing strips such as rubber strips, or foam rubber is further smeared in a gap between the sealing strips and the communication port, so that the sealing effect of the end mould unit is improved, and the pouring quality of the secondary lining is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.
Claims (6)
1. The tunnel construction method based on the arc steel mould trolley is characterized in that the arc steel mould trolley comprises a first portal frame, a second portal frame and a mould supporting mechanism, lifting devices are arranged at two ends of the second portal frame along the front-back direction, a first station and a second station are arranged on the second portal frame along the front-back direction, and the first portal frame is movably sleeved on the second portal frame and can move between the first station and the second station; the formwork supporting mechanism comprises a formwork assembly, a first driving oil cylinder, a second driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, wherein the formwork assembly comprises an upper formwork, a first side formwork, a second side formwork and a lower formwork; the upper template, the first side template, the lower template and the second side template are sequentially connected and arranged around the first portal; the two ends of the first driving oil cylinder are respectively hinged with the first side template and the first portal frame, the two ends of the second driving oil cylinder are respectively hinged with the second side template and the first portal frame, and the two ends of the third driving oil cylinder are respectively hinged with one end of the upper template, which is close to the first side template, and one end of the first side template, which is close to the upper template; two ends of the adjusting screw rod can be respectively hinged to one ends of the first portal and the upper template far away from the first side template; in the front-rear direction, the length of the second portal is L 1, and the length of the template assembly is L 2, which satisfies the following conditions: l 1/L2 is more than or equal to 2; the formwork supporting mechanism further comprises a plurality of end formwork units, the end formwork units are arranged around the front end part of the formwork assembly along the moving direction of the formwork supporting mechanism, each end formwork unit comprises a first baffle, a second baffle, a limiting piece, a rotating piece, a supporting rod and a limiting screw rod, the first baffle and the second baffle are arranged at intervals along the radial direction of the formwork assembly and form a communication port, the first baffle is connected with the second baffle through the limiting piece, one end of the rotating piece is fixedly connected with the first baffle and/or the second baffle, the other end of the rotating piece is hinged with the formwork assembly, one end of the limiting screw rod is fixedly connected with the formwork assembly through the supporting rod, and the other end of the limiting screw rod is hinged with the first baffle or the second baffle;
The construction method comprises the following steps:
erecting a first steel bar net rack on the inner wall of the tunnel;
The first portal moves from the first station to the second station;
The lifting device drives the second door frame to descend to a first target position so as to enable the lower template to be matched with a part of the corresponding structure of the first steel bar net frame;
the second driving oil cylinder drives the second side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack;
The first driving oil cylinder drives the first side template to move to a position matched with a part of the structure corresponding to the first steel bar net rack;
the third driving oil cylinder drives the upper template to move to a position matched with a part of the structure corresponding to the first steel bar net rack;
The adjusting screw rod is installed, and the position of the upper die plate is adjusted through the adjusting screw rod;
Installing a plurality of limit screws, and supporting a plurality of end die units between the die plate assembly and the inner wall of the tunnel through the plurality of limit screws;
pouring concrete between the template assembly and the inner wall of the tunnel;
The lifting device retracts and breaks away from the supporting surface of the tunnel;
The second door frame moves along the extending direction of the tunnel so as to enable the first door frame to be switched from the second station to the first station;
the lifting device extends out and is supported on the supporting surface;
Disassembling the adjusting screw rod;
the third driving oil cylinder drives the upper die plate to reset and demould;
The first driving oil cylinder drives the first side template to reset and demould;
the second driving oil cylinder drives the second side template to reset and demould;
removing a plurality of limit screws, and resetting a plurality of end die units;
the lifting device drives the second portal to rise to a second target position so as to demould the lower template.
2. The tunnel construction method based on the circular arc steel mold trolley according to claim 1, wherein before the second portal moves along the extending direction of the tunnel, the method comprises:
and erecting a second steel bar net rack on the inner wall of the extending direction of the tunnel.
3. The tunnel construction method based on the circular arc steel mould trolley according to claim 1, wherein the tunnel construction method is characterized in that: the two ends of the first portal frame in the front-rear direction are respectively provided with a first supporting device, the first supporting device comprises a limiting oil cylinder and a first supporting beam, and the two ends of the limiting oil cylinder are respectively connected with the first portal frame and the first supporting beam;
before the concrete is poured between the template component and the inner wall of the tunnel, the method further comprises the following steps:
the limiting oil cylinder drives the first supporting beam to be supported on the supporting surface of the tunnel;
Before the lifting device drives the second portal to rise to the second target position, the lifting device further comprises:
The limiting cylinder retracts and is separated from the supporting surface.
4. The tunnel construction method based on the circular arc steel mold trolley according to claim 1, wherein after the first portal frame moves from the first station to the second station, the tunnel construction method further comprises:
cleaning the outer surface of the template assembly.
5. The tunnel construction method based on the circular arc steel mold trolley according to claim 4, wherein the cleaning the outer surface of the template assembly comprises:
cleaning concrete and curing agent on the outer surfaces of the upper template, the first side template, the second side template and the lower template;
and coating release agents on the outer surfaces of the upper template, the first side template, the second side template and the lower template.
6. The tunnel construction method based on the circular arc steel mould trolley according to claim 1, wherein,
After the plurality of limit screws are installed and the plurality of end die units are supported between the die plate assembly and the inner wall of the tunnel through the plurality of limit screws, the device further comprises:
Installing an embedded part between the template assembly and the inner wall of the tunnel through the communication port;
and sealing the communication port by adopting a sealing strip.
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| EP4545751A1 (en) * | 2022-06-27 | 2025-04-30 | Grupo Empresarial Tecozam, S.L. | Self-launching formwork system and method for lining a tunnel |
| CN116423111B (en) * | 2023-06-13 | 2023-08-22 | 广东欣龙隧道装备股份有限公司 | Shield casing welding tool |
| CN120946363B (en) * | 2025-10-15 | 2026-02-10 | 中交一公局集团有限公司 | Transverse movement adjusting device of long-distance tunnel open cut tunnel lining template |
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| BE825734A (en) * | 1974-04-24 | 1975-06-16 | GRID-SHAPED PADDING MAT FOR MINE SUPPORT | |
| KR100977560B1 (en) * | 2008-04-21 | 2010-08-23 | 코오롱건설주식회사 | Side formwork of tunnel lining foam |
| CN103470272B (en) * | 2013-10-11 | 2016-02-10 | 北京住总集团有限责任公司 | A kind of chassis for the multiple section concrete construction of Mining Method and construction method thereof |
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| CN216950389U (en) * | 2021-12-31 | 2022-07-12 | 广东欣龙隧道装备股份有限公司 | Circular arc steel mould trolley |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114320369A (en) * | 2021-12-31 | 2022-04-12 | 广东欣龙隧道装备股份有限公司 | Circular arc steel mould trolley and tunnel construction method adopting same |
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