CN216950389U - Circular arc steel mould trolley - Google Patents

Circular arc steel mould trolley Download PDF

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Publication number
CN216950389U
CN216950389U CN202123455169.0U CN202123455169U CN216950389U CN 216950389 U CN216950389 U CN 216950389U CN 202123455169 U CN202123455169 U CN 202123455169U CN 216950389 U CN216950389 U CN 216950389U
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China
Prior art keywords
portal
oil cylinder
formwork
template
supporting
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CN202123455169.0U
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Chinese (zh)
Inventor
郑杨锐
陈美婷
陈国昌
刘志诚
朱永亮
靳建伟
何自行
陈超恒
刁锦华
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Guangdong Xinlong Tunnel Equipment Co ltd
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Guangdong Xinlong Tunnel Equipment Co ltd
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Priority to CN202123455169.0U priority Critical patent/CN216950389U/en
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Abstract

The utility model discloses an arc steel mould trolley, and relates to the technical field of buildings. Wherein, circular arc steel mould platform truck includes: the front end and the rear end of the second portal are provided with lifting devices; the second portal frame can move relative to the first portal frame; the formwork supporting mechanism comprises a formwork component, a first driving oil cylinder, a second driving oil cylinder and a third driving oil cylinder, wherein the formwork component comprises an upper formwork, a first side formwork, a lower formwork and a second side formwork which are sequentially connected and arranged around a first portal. The first side template is connected with the upper template through the third driving oil cylinder, so that the first driving oil cylinder and the third driving oil cylinder can work together, and the demolding efficiency or the formwork supporting efficiency can be improved. The third driving oil cylinder has smaller influence on the position limitation of the upper template in the process of driving the upper template to be close to the first portal, so that the upper template is closer to the first portal, the structure is more compact, and the collision condition can be reduced.

Description

Circular arc steel mould trolley
Technical Field
The utility model relates to the technical field of buildings, in particular to an arc steel mould trolley.
Background
For the tunnel with higher sealing requirement, secondary lining is needed after shield construction, so as to meet the requirements of reinforcement and support, sealing and water proofing. In the related technology, the secondary lining construction of the tunnel generally needs to be carried out by using a trolley for pouring in a matching way, and a formwork of the trolley is supported or demolded under the driving of an oil cylinder. But traditional platform truck takes place mutual interference easily between the drive cylinder of a plurality of templates in drawing of patterns process, leads to the drawing of patterns degree of difficulty great, efficiency lower, and the template is nearer with the inner wall in tunnel apart from after the drawing of patterns moreover, collides with the inner wall in tunnel easily at the in-process of removal platform truck.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the arc steel mould trolley which can improve the demoulding efficiency, increase the distance from a demoulded template to the inner wall surface of a tunnel and reduce the collision condition.
According to the embodiment of the first aspect of the utility model, the circular arc steel mould trolley comprises:
a first portal;
the front end and the rear end of the second portal are provided with lifting devices, the second portal penetrates through the first portal, and the second portal and the first portal can move relatively;
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 upper template is positioned above the first portal, and the first side template and the second side template are respectively positioned on the left side and the right side of the first portal; the two ends of the first driving oil cylinder are respectively hinged with the first side template and the first door frame, the two ends of the second driving oil cylinder are respectively hinged with the second side template and the first door frame, and the 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, so that the upper template and the second side template are separated or connected with each other;
one end of the adjusting screw rod is hinged with one end, far away from the first side template, of the upper template, the other end of the adjusting screw rod is hinged with the first portal, and the adjusting screw rod is used for adjusting the position of the upper template or supporting the upper template;
the length of the second door frame along the front-back direction is L1The length of the template component along the front-back direction is L2，L1And L2Satisfy L1/L2≥2。
The arc steel mould trolley provided by the embodiment of the utility model at least has the following beneficial effects:
the first side template is hinged with the upper template through the third driving oil cylinder, and the first side template is hinged with the first portal through the first driving oil cylinder, so that the third driving oil cylinder can work together with the first driving oil cylinder, no interference occurs between the two oil cylinders, and the demolding or formwork supporting efficiency is high. The third driving oil cylinder has less influence on the position limitation of the upper template in the process of driving the upper template to be close to the first portal, so that the upper template can be closer to the first portal, and the structure is more compact; therefore, the first side template and the second side template can be closer to the first portal, and the condition of colliding with the wall surface of the tunnel can be reduced. The position of the upper template can be adjusted by adjusting the screw rod, so that the upper template is in a proper pouring position, and the upper template can be supported. The length of second portal is twice or more of template component length, enables to make things convenient for template component to remove to next construction position, improves work efficiency.
According to some embodiments of the utility model, the circular arc steel form trolley further comprises a hydraulic pump, a reversing valve and a synchronous valve, and the hydraulic pump, the reversing valve, the synchronous valve and the plurality of first driving cylinders are connected to form a synchronous loop.
According to some embodiments of the utility model, the second mast comprises a guide rail extending in a fore-and-aft direction, the first mast comprising a guide wheel in rolling engagement with the guide rail.
According to some embodiments of the utility model, the upper end and the lower end of the second portal are provided with at least two guide rails at intervals, the upper end and the lower end of the first portal are provided with at least two rows of guide wheel sets corresponding to the guide rails, each row of guide wheel set comprises a plurality of guide wheels, and the plurality of guide wheels are arranged at intervals along the extending direction of the guide rails.
According to some embodiments of the utility model, the front end and the rear end of the first portal frame are provided with first supporting devices, each of the first supporting devices comprises a limiting oil cylinder and a first supporting beam, one end of each limiting oil cylinder is connected with the first portal frame, and the other end of each limiting oil cylinder is connected with the first supporting beam, so that the first supporting beam is abutted against the wall surface of the tunnel or a steel bar fixed on the wall surface of the tunnel.
According to some embodiments of the utility model, the lifting device comprises at least two support legs, at least two support legs are arranged at intervals along the left-right direction of the second gantry, each support leg comprises a lifting oil cylinder, a fixing part, a guide part and a sliding part, the guide part is fixedly connected to the fixing part, a cavity is formed inside the guide part, the sliding part is arranged in the cavity, one end of the lifting oil cylinder is connected with the fixing part, and the other end of the lifting oil cylinder is connected with the sliding part, so that the sliding part can slide along the axial direction of the guide part.
According to some embodiments of the present invention, the front end and the rear end of the second portal frame are provided with second supporting devices, each of the second supporting devices includes a connecting member, a second supporting beam, and an adjusting cylinder, the connecting member is connected to the lifting device, the lower end of the lifting device is provided with two moving members, the two moving members are spaced apart from each other along the front-rear direction of the lifting device, the second supporting beam extends along the left-right direction and is slidably connected to the moving members, one end of the adjusting cylinder is connected to the connecting member, and the other end of the adjusting cylinder is connected to the second supporting beam to drive the second supporting beam and the second portal frame to move relatively.
According to some embodiments of the present invention, the formwork supporting mechanism further includes a plurality of end formwork units, the end formwork units are disposed at an end of the moving direction of the formwork assembly and are disposed around the formwork assembly, the end formwork unit includes a first baffle plate, a second baffle plate, a limiting member, a rotating member, a support rod and a limiting screw rod, the first baffle plate and the second baffle plate are disposed at intervals along a radial direction of the formwork assembly, the first baffle plate and the second baffle plate are connected by the limiting member, one end of the rotating member is fixedly connected to the first baffle plate and/or the second baffle plate, the other end of the rotating member is hinged to the formwork assembly, so that the first baffle plate and the second baffle plate can be rotatably connected to the formwork assembly, one end of the support rod is fixedly connected to the formwork assembly, and the other end of the support rod is hinged to one end of the limiting screw rod, the other end of the limiting screw rod is hinged to the first baffle or the second baffle, and the limiting screw rod is used for adjusting or fixing the position of the end die unit.
According to some embodiments of the present invention, the adjusting screw includes a first screw, a second screw, an adjusting sleeve, a first nut and a second nut, the first screw and the second screw are respectively screwed on two ends of the adjusting sleeve, the first nut is screwed with the first screw to limit the relative rotation of the first screw and the adjusting sleeve, and the second nut is screwed with the second screw to limit the relative rotation of the second screw and the adjusting sleeve.
According to some embodiments of the utility model, the second supporting device further comprises a partition plate, the partition plate is arranged between the second supporting beam and the lifting device and is fixedly connected with the second supporting beam, and the partition plate is used for reducing the contact area between the second supporting beam and the lifting device.
According to some embodiments of the utility model, the first side form includes an arcuate panel, the arcuate panel being integrally formed.
The tunnel construction method comprises the steps that according to the embodiment of the second aspect of the utility model, any one of the arc steel mould trolleys in the first aspect is included, and the second portal comprises a first station and a second station along the length direction;
the tunnel construction method comprises the following steps:
the first gantry moves from the first station to the second station;
the lifting device drives the second portal frame to descend to a first target position;
the second driving oil cylinder drives the second side formwork to move to a first pouring position;
the first driving oil cylinder drives the first side template to move to a second pouring position;
the third driving oil cylinder drives the upper template to move to a third pouring position;
the upper template is hinged with the first portal through the adjusting screw rod;
pouring concrete between the formwork assembly and the inner wall of the tunnel;
the lifting device retracts and disengages from the supporting surface of the tunnel;
the second portal moves along the extending direction of the tunnel so that the first portal moves 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 template to reset and demold;
the first driving oil cylinder drives the first side template to reset and demold;
the second driving oil cylinder drives the second side template to reset and demold;
and the lifting device drives the second door frame to ascend to a second target position so as to demould the lower template.
The tunnel construction method provided by the embodiment of the utility model at least has the following beneficial effects:
the first side template is hinged with the upper template through the third driving oil cylinder, and the first side template is hinged with the first portal through the first driving oil cylinder, so that the third driving oil cylinder can work together with the first driving oil cylinder, no interference occurs between the two oil cylinders, and the demolding or formwork supporting efficiency is high. The third driving oil cylinder has less influence on the position limitation of the upper template in the process of driving the upper template to be close to the first portal, so that the upper template can be closer to the first portal, and the structure is more compact; therefore, the first side template and the second side template can be closer to the first portal, and the condition of colliding with the wall surface of the tunnel can be reduced. The position of the upper template can be adjusted by adjusting the screw rod, so that the upper template is in a position suitable for pouring. The length of second portal is twice or more of template component length, enables to make things convenient for template component to remove to next construction position, improves work efficiency.
According to the tunnel construction method based on the arc steel mould trolley, the arc steel mould trolley comprises a first portal, a second portal and a mould supporting mechanism, wherein two ends of the second portal in the front-back direction are respectively provided with a lifting device, the second portal is provided with a first station and a second station in the front-back direction, and the first portal is movably sleeved on the second portal and can move between the first station and the second station; the formwork supporting mechanism comprises a formwork componentThe template assembly comprises an upper template, a first side template, a second side template and a lower template; 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 door frame, the two ends of the second driving oil cylinder are respectively hinged with the second side template and the first door frame, and the 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; two ends of the adjusting screw rod can be respectively hinged to one ends, far away from the first side template, of the first door frame and the upper template; the length of the second portal frame is L in the front-back direction1The length of the template component is L2And satisfies the following conditions: l is1/L2≥2；
The construction method comprises the following steps:
erecting a first steel bar net rack on the inner wall of the tunnel;
the first gantry 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 that the lower template is matched with a part of the structure corresponding to the first steel bar net rack;
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 partial 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 partial structure corresponding to the first steel bar net rack;
installing the adjusting screw rod, and adjusting the position of the upper template through the adjusting screw rod;
pouring concrete between the formwork assembly and the inner wall of the tunnel;
the lifting device retracts and disengages from the supporting surface of the tunnel;
the second portal moves along the extending direction of the tunnel so as to enable the first portal 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 template to reset and demold;
the first driving oil cylinder drives the first side template to reset and demold;
the second driving oil cylinder drives the second side template to reset and demould;
and the lifting device drives the second door frame to ascend 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 utility model at least has the following beneficial effects:
in the construction of the secondary lining of the tunnel, the embodiment of the utility model adopts the circular arc steel mould trolley to realize the integral casting of the secondary lining of the cylindrical tunnel subsection, and the circular arc steel mould trolley moves along the extension direction of the tunnel and continuously casts the remaining secondary lining of the tunnel subsection; the circular arc steel mould trolley comprises a first portal, a second portal and a mould supporting mechanism, 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 frame is supported on the supporting surface of the tunnel, the formwork supporting mechanism can complete the procedures of formwork supporting, pouring, forming and the like on the second station under the driving of the first portal frame, and simultaneously the second portal frame is separated from the supporting surface and moves along the extending direction of the tunnel before demoulding, thereby the mold supporting mechanism is switched to the first station, the second portal frame is supported on the supporting surface of the tunnel again, at the moment, the mold supporting mechanism finishes demolding on the first station, and moving to a second station again to realize the working procedures of formwork supporting, pouring, forming and the like of the second lining of the next section of tunnel subsection, and realizing the cycle of integral pouring of the second lining of the tunnel subsection. According to the embodiment of the utility model, the integral pouring of the secondary linings of the multiple tunnel sections is realized through the step-changing operation of the second portal and the formwork supporting mechanism, so that the construction efficiency of the secondary lining is improved. The mold supporting mechanism comprises a mold plate assembly, a first driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, the mold plate assembly comprises an upper mold plate and a first side mold plate, two ends of the first driving oil cylinder are respectively hinged with the first side mold plate and a first door frame, two ends of the third driving oil cylinder are respectively hinged with one end of the upper mold plate close to the first side mold plate and one end of the first side mold plate close to the upper mold plate, and two ends of the adjusting screw rod can be respectively hinged with the first door frame and one end of the upper mold plate far away from the first side mold plate; the third driving oil cylinder and the adjusting screw rod are connected in a manner that the first side template and the upper template can be synchronously supported and demolded through the first driving oil cylinder and the third driving oil cylinder respectively, so that the demolding difficulty is reduced, the demolding efficiency is improved, and the secondary lining construction efficiency of the tunnel is further improved; and the template component can be more drawn in first portal under the drawing of patterns state, has effectively avoided first portal to bump with the inner wall in tunnel at the removal in-process, has improved the security of construction.
According to some embodiments of the utility model, before the second mast is moved in the extending direction of the tunnel, comprises: and erecting a second steel bar net rack on the inner wall of the tunnel in the extending direction.
According to some embodiments of the present invention, two ends of the first gantry along the front-back direction are respectively provided with a first supporting device, the first supporting device comprises a limiting cylinder and a first supporting beam, and two ends of the limiting cylinder are respectively connected to the first gantry and the first supporting beam; before the concrete is poured between the formwork assembly 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 door frame to ascend to the second target position, the lifting device further comprises: and the limiting oil cylinder retracts and is separated from the supporting surface.
According to some embodiments of the utility model, after the first portal is moved from the first station to the second station, further comprising: cleaning an outer surface of the stencil assembly.
According to some embodiments of the utility model, the cleaning the exterior surface of the stencil assembly comprises: cleaning concrete and curing agents on the outer surfaces of the upper template, the first side template, the second side template and the lower template; and coating a release agent 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 utility model, the formwork 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 mechanism, the end die unit comprises a first baffle, a second baffle, a limiting piece, a rotating piece, a supporting rod and a limiting lead screw, the first baffle plate and the second baffle plate are arranged at intervals along the radial direction of the template component and form communicating ports, the first baffle plate and the second baffle plate are connected through the limiting piece, one end of the rotating piece is fixedly connected with the first baffle plate and/or the second baffle plate, the other end of the rotating piece is hinged with the template assembly, one end of the limiting screw rod is fixedly connected with the template 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 formwork assembly and the inner wall of the tunnel, the method further comprises the following steps: installing a plurality of limiting screw rods, and supporting a plurality of end die units between the template assembly and the inner wall of the tunnel through the limiting screw rods; before the lifting device drives the second door frame to ascend to the second target position, the lifting device further comprises: and removing the plurality of limiting screw rods and resetting the plurality of end die assemblies.
According to some embodiments of the utility model, after installing a plurality of the limiting screws and supporting a plurality of the end die units between the die plate assembly and the inner wall of the tunnel through the plurality of the limiting 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 communicating port by using a sealing strip.
Additional aspects and advantages of the utility model 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 utility model.
Drawings
The utility model is further described with reference to the following figures and examples, in which:
FIG. 1 is a schematic view of the overall structure of a circular arc steel form trolley according to an embodiment of the utility model;
FIG. 2 is a schematic view of formwork construction of a circular arc steel form trolley according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the demolding construction of the circular arc steel mold trolley according to one embodiment of the utility model;
FIG. 4 is a schematic diagram of the retraction of the lift device of the circular arc steel form carriage of one embodiment of the present invention;
FIG. 5 is a sectional view taken along line A-A of FIG. 4;
FIG. 6 is an enlarged view at B in FIG. 5;
FIG. 7 is a schematic view of a lifting device for a circular arc steel form trolley according to an embodiment of the present invention;
FIG. 8 is an exploded view of a second support device of the circular arc steel form trolley according to one embodiment of the present invention;
FIG. 9 is a schematic view of a synchronization loop for a circular arc steel form trolley according to one embodiment of the present invention;
FIG. 10 is a schematic view of an adjusting screw structure of a circular arc steel form trolley according to an embodiment of the utility model;
FIG. 11 is an exploded view of the adjustment screw of the 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 the circular arc steel form trolley of one embodiment of the present invention;
FIG. 13 is a schematic structural view of another perspective of the first side form of the circular arc steel form trolley in accordance with one embodiment of the present invention;
fig. 14 is a schematic structural view of an end mold unit of the circular arc steel mold trolley according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings only for the convenience of description of the present invention and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood 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 otherwise specifically limited, terms such as set, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.
Referring to fig. 1, 2 and 5, an overall structural schematic diagram of an arc steel form trolley 1000 according to an embodiment of the present invention may be used for lining a tunnel, especially for secondary lining after preliminary bracing of the tunnel. The circular arc steel form trolley 1000 includes a second gantry 100, a first gantry 200, and a form erecting mechanism 300. The front end and the rear end of the second door frame 100 are provided with lifting devices 110, which are used for driving the second door frame 100 to ascend or descend, and further driving the first door frame 200 and the formwork supporting mechanism 300 to ascend or descend. The second gantry 100 is partially penetrated through the first gantry 200, and the second gantry 100 and the first gantry 200 can move relatively. When the second gantry 100 supports the first gantry 200, the first gantry 200 can move in the front-rear direction of the second gantry 100; when the first gantry 200 supports the second gantry 100, as shown in fig. 4, the lifting device 110 is retracted away from the supporting surface of the tunnel, and the second gantry 100 can move in the fore and aft direction of the first gantry 200, thereby achieving the movement of the circular arc steel form carriage 1000 in a mutually supporting manner. It should be noted that, the relative movement of the second portal 100 and the first portal 200 may be realized by driving a gear by a motor, and the gear may move in a manner of matching with a rack, or may move in a manner of driving a steel wire by a winch, and the present invention is not limited specifically. The engagement between the second portal 100 and the first portal 200 may be in the form of a ball and slide way, or in the form of a guide 220 and a guide rail 130, and the present invention is illustrated in the form of the guide 220 engaging the guide rail 130 in the following description.
Referring to fig. 2 and 3, fig. 2 is a schematic view of a formwork of an arc steel form trolley 1000, fig. 3 is a schematic view of a demoulding of the arc steel form trolley 1000, a section line in fig. 2 and 3 is poured concrete, and a duct piece is arranged on the outer side of the concrete. 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 mold plate assembly 310 includes an upper mold plate 311, a first side mold plate 312, a lower mold plate 313 and a second side mold plate 314 which are sequentially disposed around the first gantry 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 door frame 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 door frame 200 respectively, and the lower template 313 is located below the first door frame 200 and is fixedly connected with the first door frame 200. The formwork assembly 310 is used for enclosing a pouring area with the wall surface of the tunnel, and therefore setting of concrete is facilitated.
Referring to fig. 4, one end of the first driving cylinder 320 is hinged to the first side mold plate 312, and the other end of the first driving cylinder 320 is hinged to the first door frame 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 frame 200; one end of the third driving cylinder 340 is hinged to one end of the upper die plate 311 close to the first side die plate 312, the other end of the third driving cylinder 340 is hinged to one end of the first side die plate 312 close to the upper die plate 311, and the third driving cylinder 340 can drive the upper die plate 311 and the second side die plate 314 to be connected or disconnected with each other. The first driving cylinder 320, the second driving cylinder 330 and the third driving cylinder 340 are all used for driving the corresponding template assembly 310 to be close to the first door frame 200 to realize demolding or to be far away from the first door frame 200 to realize formwork supporting.
Referring to fig. 5, the second door frame 100 has a length L1 in the front-rear direction, the template assembly 310 has a length L2, and L1 and L2 satisfy L1/L2Not less than 2. It is understood that the formwork assembly 310 needs to be moved in the front-rear direction of the second gate frame 100 to realize different positions of the cast tunnel, and thus the length of the second gate frame 100 needs to be greater than or equal to twice the length of the formwork assembly 310 so that the formwork assembly 310 can be smoothly moved to realize the mold release.
Referring to fig. 2, the formwork supporting mechanism 300 further includes a first adjusting screw 350, a second adjusting screw 360 and a third adjusting screw 370, the upper formwork 311 is hinged to the first gantry 200 through the first adjusting screw 350, the first side formwork 312 is hinged to the first gantry 200 through the second adjusting screw 360, and the second side formwork 314 is hinged to the first gantry 200 through the third adjusting screw 370. One end of the first adjusting screw 350 is hinged to one end of the upper mold plate 311 away from the first side mold plate 312, and the other end of the first adjusting screw 350 is hinged to the first door frame 200. The first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 are all used for adjusting the position of the corresponding formwork assembly 310, and after the position of the formwork assembly 310 is determined, the first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 can be used for supporting the formwork assembly 310, so that the position of the formwork assembly 310 can be limited, and the formwork assembly 310 can be located at a position suitable for pouring.
The structure of the first adjusting screw 350 is specifically shown in 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, the first screw 351 and the second screw 354 are respectively screwed on two ends of the adjusting sleeve 355, the first nut 352 is screwed with 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 with the second screw 354 to limit the relative rotation of the second screw 354 and the adjusting sleeve 355. The position of the template assembly 310 is adjusted by changing the overall length of the first adjustment screw 350 by rotating the adjustment sleeve 355, and the position of the template assembly 310 is fixed by fixing the length of the first adjustment screw 350 through the first nut 352 and the second nut 353 after the position of the template assembly 310 is determined. It should be noted that the structures of the second adjusting screw 360 and the third adjusting screw 370 are substantially the same as the first adjusting screw 350, and are not described herein again, and the structures of the second adjusting screw 360 and the third adjusting screw 370 can be understood with reference to the structure of the first adjusting screw 350.
Referring to fig. 2, the upper mold plate 311 abuts against the second side mold plate 314 in the mold supporting process, a rubber gasket is arranged on the wall surface of the second side mold plate 314 abutting against the upper mold plate 311, so that abrasion can be reduced, the second side mold plate 314 and the upper mold plate 311 can be fixedly connected through bolts or bolts after abutting, and the position of the upper mold plate 311 can be limited only through the first adjusting screw 350. In the demolding process, referring to fig. 3, if a bolt or a bolt is arranged between the upper mold plate 311 and the second side mold plate 314, the bolt or the bolt needs to be detached first, the first adjusting screw 350, the second adjusting screw 360 and the third adjusting screw 370 need to be detached, then 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, after demolding, the upper mold plate 311 is separated from the second side mold plate 314, and other mold plates are still hinged. The lower template 313 needs the lifting device 110 to lift up to enable the height of the template assembly 310 to be increased for demoulding.
Referring to fig. 3, the first supporting means 210 is hidden for easy observation. In order to enable the upper mold plate 311, the first side mold plate 312, and the second side mold plate 314 to be closer to the first mast 200 during the demolding process, the third driving cylinder 340 is provided on the upper mold plate 311 and the first side mold plate 312. It can be understood that, in the demolding process, if the third driving cylinder 340 is connected to the first gantry 200, since the distance from the upper mold plate 311 to the first gantry 200 is relatively long, the length of the third driving cylinder 340 is relatively long, which leads to a decrease in rigidity, and vibrations are likely to occur in the driving process, and the driving is not stable; when the third driving oil cylinder 340 contracts for demolding, if the first driving oil cylinder 320 also contracts for demolding, under the condition that the control is unstable, a certain template is easy to be faster or slower, and further the oil cylinder is damaged, in order to reduce the occurrence of the condition, the third driving oil cylinder 340 is usually required to drive the upper template 311 for demolding, and the first driving oil cylinder 320 can drive the demolding; due to the length limitation of the third driving cylinder 340, the deflection angle thereof is limited, and the upper mold plate 311, the first side mold plate 312 and the second side mold plate 314 are restricted from approaching the first gantry 200.
The third driving oil cylinder 340 is arranged on the upper template 311 and the first side template 312, so that the problems can be reduced, the upper template 311 is adjacent to the first side template 312, the length of the third driving oil cylinder 340 is shorter than that when the third driving oil cylinder is arranged on the first portal frame 200, the rigidity is better, the vibration can be reduced, and the driving stability is improved; the third driving oil cylinder 340 can work simultaneously with the first driving oil cylinder 320, the two do not influence each other, and the demolding efficiency or the formwork supporting efficiency can be improved; in the demolding process, the third driving oil cylinder 340 has small influence on the whole rotating position of the template, 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 the tunnel or the steel bars in the moving process can be reduced.
Referring to FIG. 1, in some embodiments, upper die plate 311, first side die plate 312, and 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, the first side template 312 is illustrated as an example. The crisscross interval of the internal face of arc 3121 is provided with polylith deep floor 3122 to improve arc 3121's bulk strength, reduce arc 3121's deformation, improve its stability. Wherein the arc plate 3121 is integrally formed. It can be understood that the arc plate 3121 is integrally formed, and its surface quality is good, and is smooth and flat, and when demoulding, the surface of concrete structure is smooth and flat. If the first side template 312 is formed by splicing a plurality of pieces, stress concentration is easy to occur at the spliced position, so that the first side template 312 is deformed, and the pouring effect is influenced; and the arc plate 3121 can be subjected to aging treatment after being manufactured, so that the phenomenon of stress concentration is reduced.
In some embodiments, the arc plate 3121 is made of manganese steel, which is a high-strength steel material mainly used for severe conditions such as impact, extrusion, and material abrasion, and has excellent alkali resistance and corrosion resistance. It can be appreciated that concrete is generally alkaline and tends to corrode the curved plate 3121, and the use of manganese steel for the curved plate 3121 reduces the likelihood of corrosion of the curved plate 3121.
Referring to fig. 9, in some embodiments, in order to improve the synchronization of the driving 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 synchronization of the driving, and the structure and function are basically similar to the first driving cylinder 320, and the first driving cylinder 320 is taken as an example for illustration). Common to the synchronized valves are a splitter valve and a combining and dividing valve 420. Taking the flow dividing and combining valve 420 as an example, the flow dividing and combining valve 420 can enable the first driving oil cylinder 320 to be synchronous in two directions, and the flow dividing and combining valve 420 can also be used for a synchronous circuit 400 with larger load difference, so that speed synchronization can be still ensured when the load is completely deviated, and the synchronization precision is higher. The synchronous circuit 400 refers to a hydraulic system in which two or more hydraulic actuators are operated synchronously at the same displacement or the same speed (or fixed speed ratio).
Referring to fig. 9, for example, when the reversing valve 440 is connected to the left loop, hydraulic oil of the hydraulic pump 460 is divided into two equal hydraulic oil flows into the first driving cylinders 320 by the flow dividing and collecting valve 420, so that the first driving rods of the two cylinders rise synchronously; when the reversing valve 440 is connected to the loop at the right position, the flow distributing and collecting valve 420 has a flow collecting function and controls the synchronous descending of the two cylinder pistons. The pilot operated check valve 410 in the circuit is to prevent the first drive cylinders 320 from shifting due to different loads when the stroke is stopped halfway. If one of the first driving cylinders 320 reaches the stroke end first, oil is leaked through the throttle hole in the one-way throttle valve 430, so that all cylinders can reach the end, and accumulated errors are eliminated. The overflow valve 450 plays a role of safety protection, and is depressurized when the pressure exceeds a threshold value. The synchronization circuit 400 enables the actuation of the first actuation cylinder 320 to be synchronized to reduce deformation of the die plate assembly 310.
Referring to fig. 5 and 6, in some embodiments, the second frame 100 includes a guide rail 130, the guide rail 130 extends along a front-rear direction of the second frame 100, two guide rails 130 are spaced at both upper and lower ends of the second frame 100, the first frame 200 includes guide wheel sets, two guide wheel sets corresponding to positions of the guide rails 130 are spaced at both upper and lower ends of the first frame 200, each guide wheel set includes a plurality of guide wheels 220, and the guide wheels 220 are spaced along an extending direction of the guide rail 130. The guide rail 130 is engaged with the guide roller 220 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 can be selected according to actual needs. In some embodiments, it is also possible that the guide rail 130 is provided on the first mast 200 and the guide pulley 220 is provided on the second mast 100.
Referring to fig. 3, 4 and 5, the first gantry 200 further includes a first supporting device 210, and the first supporting device 210 is disposed at both front and rear ends of the first gantry 200. It can be understood that the circular arc steel form trolley 1000 is supported in the tunnel by the gravity of the circular arc steel form trolley 1000, and the circular arc steel form trolley 1000 is easily jacked up by concrete in the pouring process, so that the position of the circular arc steel form trolley 1000 is changed, and the pouring effect is influenced. Accordingly, the first supporting device 210 serves to fix the position of the circular arc steel form carriage 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 on the left side and the right side of the first door 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 the tunnel or the shape of the reinforcing steel bar net rack. The first support beam 211 of spacing hydro-cylinder 212 drive along vertical direction and tunnel wall or fix the reinforcing bar butt at the tunnel wall to restriction circular arc steel form trolley 1000's position reduces the problem that circular arc steel form trolley 1000 was by the jack-up, can improve the stability of 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 to the guide 1114, a cavity is formed inside the guide 1114, the sliding member 1113 is disposed inside the cavity, one end of the lifting cylinder 1112 is connected to the fixing member 1111, and the other end of the lifting cylinder 1112 is connected to the sliding member 1113, so that the sliding member 1113 can slide along the axial direction of the guide 1114, and the second mast 100 is driven to move in the vertical direction.
As shown in fig. 7 and 8, the second portal 100 further includes a second supporting device 120, the second supporting device 120 is disposed at both front and rear ends of the second portal 100, and the second supporting device 120 is connected to the two legs 111 for driving the circular arc steel form 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, 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 to form a cavity, and part of the 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 surrounded by the channel steel 1211, and one end of the adjusting cylinder 122 is connected to the channel steel 12111, and the other end is connected to the second support beam 123. The supporting legs 111 are provided with moving parts 112, and the cross section of the moving parts 112 is L-shaped. The number of the moving members 112 is four, one moving member 112 is disposed in the front-back direction of each leg 111 (the aforementioned "four, two" are only some embodiments of the present invention, and other numbers are also possible, for example, eight moving members 112 are provided, four are disposed on each leg 111, and the number is selected according to actual situations), and the second supporting beam 123 is slidably connected to the legs 111 through the moving members 112. It can be understood that, when the tunnel turns, the position of the circular arc steel form trolley 1000 needs to be adjusted, the second supporting beam 123 abuts against the inner wall of the tunnel, and the circular arc steel form trolley 1000 can be wholly deviated under the driving of the adjusting cylinder 122, so that the transverse position of the circular arc steel form trolley 1000 is adjusted.
Referring to fig. 8, the second support beam 123 is provided with a partition plate 124, 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, so as to reduce friction, improve the smoothness of sliding, and reduce the phenomenon of jamming. In some embodiments, the partition 124 has an elongated plate shape and is disposed along the extending direction of the second support beam 123. Two partition plates 124 are respectively disposed at two ends of the second support beam 123, so that the shaking of the second support beam 123 can be reduced. It should be noted that the partition 124 may have other shapes, such as a cylindrical shape, an oval shape, etc. The partitions 124 may also be other numbers, such as six, eight, etc.
Referring to fig. 4, the formwork supporting mechanism 300 further includes an end formwork unit 500, the end formwork unit 500 being disposed at an end of the moving direction of the formwork assembly 310, the end formwork unit 500 having a plurality of pieces and being disposed around the formwork assembly 310. The end mold unit 500 is used to form a closed space in cooperation with the mold plate assembly 310 and the wall surface of the tunnel to pour concrete. It can be understood that, in the first pouring process of the tunnel, the front and rear ends of the form assembly 310 are provided with the end form units 500, so as to pour the first reinforced concrete structure, and after the pouring is completed, the first reinforced concrete structure can serve as the function of the end form unit 500, so that the end form unit 500 does not need to be arranged at one end of the form assembly 310 close to the reinforced concrete structure, and the end form unit 500 only needs to be arranged at one end of the form assembly 310 far away from the reinforced concrete structure, that is, one end of the form assembly 310 in the moving direction. The moving direction refers to a direction in which the arc steel form carriage 1000 advances during the construction work.
Specifically, referring to fig. 14, the end mold unit 500 includes a first blocking plate 510, a second blocking plate 520, a limiting member 530, a rotating member 540, a supporting rod 550, and a limiting lead screw 560. The first baffle 510 and the second baffle 520 are arranged at intervals along the radial direction of the formwork assembly 310, gaps are formed at intervals, embedded parts can be placed through the gaps, and construction efficiency is improved. The first barrier 510 and the second barrier 520 are connected through a limiting member 530, and there are two limiting members 530, so that the connection between the first barrier 510 and the second barrier 520 is more stable. After the embedded part is arranged, the gaps need to be sealed by rubber strips and the like, then the foam rubber is coated to improve the sealing effect, and the limiting part 530 is used for preventing the rubber strips from falling off and plays a role in limiting the positions of the rubber strips. The first baffle 510 and the second baffle 520 are further connected by 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 form assembly 310, so that the end form unit 500 can be rotatably connected with the form assembly 310 to realize demolding or form erecting. In order to fix the position of the end die unit 500 when the end die unit 500 is erected, a limit screw 560 is further provided. One end of the supporting rod 550 is fixedly connected with the die plate 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 die unit 500 is adjusted by adjusting the length of the limiting screw 560. It should be noted that, the structure of the limit lead screw 560 may refer to the structure of the first adjusting lead screw 350.
In the tunnel construction method based on the arc steel mould trolley in the embodiment of the utility model, the second portal frame comprises a first station and a second station along the length direction, the first station is positioned at one end deviating from the advancing direction of the arc steel mould trolley, and the second station is positioned at one end close to the advancing direction of the arc steel mould trolley. The first station and the second station refer to positions of the template assembly during pouring construction, and the first portal can drive the template assembly to reciprocate on the second portal for construction, so that the first station and the second station are defined on the second portal for convenience of explanation.
The tunnel construction method comprises the following steps:
step S110: the first gantry moves from the first station to the second station. The first gantry can be matched with a steel wire rope through a winch, and can also be moved in a mode of matching a motor with a rack, and the first gantry is not limited in detail.
Step S120: the lifting device drives the second portal frame to descend to the first target position. The first target position refers to the height position of the second portal, and the formwork assembly connected with the second portal needs to be constructed at a proper height position.
Step S130: and the second driving oil cylinder drives the second side template to move to the first pouring position. The first pouring position refers to a position of the second side formwork when the formwork is supported, and the second driving oil cylinder drives the contracted second side formwork to move towards a direction far away from the first portal so as to support the formwork.
Step S140: the first driving oil cylinder drives the first side formwork to move to the second pouring position. The second pouring position refers to a position of the first side template during formwork supporting, and the first driving oil cylinder drives the contracted first side template to move towards a direction far away from the first portal frame to realize formwork supporting.
Step S150: and the third driving oil cylinder drives the upper template to move to a third pouring position. And the third pouring position refers to a position when the upper template is supported, and the third driving oil cylinder drives the contracted upper template to move towards a direction far away from the first portal so as to realize support. It should be noted that step S150 and step S140 may be performed synchronously, or step S150 may be performed first and then step S140 may be performed, and an appropriate step may be selected according to actual conditions.
Step S160: the upper template is hinged with the first portal through an 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, the situation that the third driving oil cylinder is not driven in place may exist. The distance between the upper template and the wall surface of the tunnel can be adjusted by changing the whole length of the adjusting screw rod through the adjusting screw rod, so that the upper template is in a position suitable for pouring.
Step S170: and pouring concrete between the formwork assembly and the inner wall of the tunnel to form a reinforced concrete structure. It can be understood that a plurality of pouring openings are formed in the formwork assembly and are arranged on the formwork assembly at intervals. The pouring opening is opened during pouring, concrete is poured through the pouring opening, the corresponding pouring opening is closed when the liquid level of the concrete is about to reach the pouring opening, and pouring is carried out through the pouring opening with the higher position. The vibrator can be arranged in the pouring process to reduce bubbles formed in the concrete, and the pouring quality is improved.
Step S180: the lifting device is retracted and disengaged from the support surface of the tunnel. After the concrete reaches expected intensity, elevating gear withdraws and is supported the second portal by first portal, and elevating gear withdraws and can reduce the second portal and collide with the condition on ground at elevating gear in the removal.
Step S190: the second portal is moved in the direction of extension of the tunnel to move the first portal from the second station to the first station. The second portal moves to facilitate the follow-up first portal to move along the second portal, so that the integral movement of the arc steel mould trolley is realized, and the arc steel mould trolley can move from one construction position to the next construction position.
Step S200: the lifting device extends out and is supported on the supporting surface. The second portal supports the first portal to facilitate movement of the subsequent first portal.
Step S210: and disassembling the adjusting screw rod. It will be appreciated that the adjustment screws need to be removed prior to stripping of the form assembly so as not to interfere with the rotation of the upper form.
Step S220: and the third driving oil cylinder drives the upper template to reset and demould. And the third driving oil cylinder drives the upper template to move towards the direction close to the first portal so as to realize demoulding.
Step S230: the first driving oil cylinder drives the first side template to reset and demould. The first driving oil cylinder drives the first side template to move towards the direction close to the first door frame to realize demoulding. It should be noted that step S230 and step S220 may also be performed synchronously, or step S230 may be performed first, step S220 may be performed again, and the selection is performed according to the actual construction situation.
Step S240: and the second driving oil cylinder drives the second side template to reset and demould. And the second driving oil cylinder drives the second side template to move towards the direction close to the first portal so as to realize demoulding.
Step S250: and the lifting device drives the second door frame to ascend to a second target position so as to demould the lower template. The second target position refers to the height position of the second portal, and the second portal rises to drive the template assembly to rise, so that the lower template is demoulded.
After step S250 is executed, step S110 and the subsequent steps may be repeated to realize a construction cycle.
It can be understood that in the second lining construction of the tunnel, the tunnel is generally divided into a plurality of construction sections for construction, and the arc steel form trolley in the embodiment of the utility model realizes the movement in the tunnel through the mutual supporting mode of the first portal frame and the second portal frame under the condition of not laying a track. Therefore, the bottom wall and the side wall of the tunnel can be poured simultaneously, and the construction efficiency is improved. It can be understood that, because cope match-plate pattern and second sideform are separable when the drawing of patterns, consequently cope match-plate pattern and second sideform can be more close to first portal when the drawing of patterns, and then the distance of increase template subassembly and tunnel wall, and the both ends of third drive hydro-cylinder articulate cope match-plate pattern and second sideform respectively, the position influence of position when the position of third drive hydro-cylinder is to the cope match-plate pattern of patterns is less, can further improve the distance between cope match-plate pattern to first portal, can reduce the condition that the template subassembly collided with the tunnel wall at the removal in-process.
According to the arc steel mould trolley provided by the embodiment of the utility model, the second portal is provided with the first station and the second station along the front-back direction, and the first portal is movably sleeved on the second portal 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 positions where the formwork supporting mechanism is located when pouring, and the first portal can drive the formwork supporting mechanism to move on the second portal in a reciprocating mode, so that the positions of the formwork supporting mechanism can be switched between the first station and the second station.
The tunnel construction method based on the arc steel mould trolley comprises the following steps:
s1501: and erecting a first steel bar net rack on the inner wall of the tunnel. First steel bar net rack is through with reinforcement in the section of jurisdiction in the tunnel, and first steel bar net rack collimates according to the secondary lining's in the tunnel design.
S1502: the first gantry moves from the first station to the second station. The first portal frame can realize the relative movement with the second portal frame through the cooperation of a winch and a steel wire rope or the cooperation of a motor and a rack, and is not particularly limited herein.
S1503: the lifting device drives the second door frame to descend to a first target position, so that the lower template is matched with a part of the structure corresponding to the first steel bar net rack. The first target position refers to the height position of the second portal frame, so that the first portal frame is lowered to the height position ready for construction, namely the position where the lower template is matched with the corresponding partial structure of the first reinforcing steel bar net rack.
S1504: and the second driving oil cylinder drives the second side template to move to a position matched with the partial structure corresponding to the first reinforcing 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: and the third driving oil cylinder drives the upper template to move to a position matched with the partial 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 actual conditions, so as to implement the formwork support of the upper formwork and the first side formwork.
S1507: and installing an adjusting screw rod, and adjusting the position of the upper template through the adjusting screw rod. Because the both ends of third drive hydro-cylinder are articulated with first side template and cope match-plate pattern respectively, consequently when third drive hydro-cylinder drive is not in place, can change its whole length in order to adjust the distance between the inner wall of cope match-plate pattern and tunnel through adjusting the lead screw to make the cope match-plate pattern move to the more suitable position in 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 understood that the pouring openings are formed in the template assembly, and the pouring openings can be arranged in a plurality of spaced mode according to requirements. And opening the pouring port during pouring and pouring concrete through the pouring port, closing the corresponding pouring port when the liquid level of the concrete is about to reach the pouring port, and replacing the pouring port with a higher position for pouring. The vibrator can be arranged in the pouring process to reduce bubbles formed in the concrete, and the pouring quality is improved.
S1509: the lifting device is retracted and disengaged from the support surface of the tunnel. After the reinforced concrete structure reaches the expected strength, the lifting device retracts, the first portal supports the second portal at the moment, and the retraction of the lifting device can reduce the situation that the lifting device collides with the inner wall of the tunnel during the movement of the second portal.
S1510: the second portal is moved in the direction of extension of the tunnel to switch the first portal from the second station to the first station. The second portal moves forwards, so that the first portal moves forwards in the subsequent steps, and the integral movement of the arc steel mould trolley is realized, namely the arc steel mould trolley moves from one tunnel subsection to the next tunnel subsection.
S1511: the lifting device extends out and is supported on the supporting surface. The second portal supports the first portal at this time, facilitating forward movement of the first portal in subsequent steps.
S1512: and disassembling the adjusting screw rod. It will be appreciated that the adjustment screws need to be removed prior to stripping of the form assembly so as not to interfere with the rotation of the upper form.
S1513: and the third driving oil cylinder drives the upper template 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 according to actual conditions, so as to achieve the demolding of the upper mold plate and the first side mold plate.
S1515: and the second driving oil cylinder drives the second side template to reset and demould.
S1516: and the lifting device drives the second door frame to ascend to a second target position so as to demould the lower template. The second target position refers to the height position of the second portal, and the second portal rises to drive the first portal to rise, so that the template assembly is driven to rise, and the lower template is demoulded.
In the construction of the secondary lining of the tunnel, the construction method of the embodiment of the utility model adopts the circular arc steel mould trolley to realize the integral casting of the secondary lining of the cylindrical tunnel subsection, and the circular arc steel mould trolley moves along the extension direction of the tunnel and continuously casts the remaining secondary lining of the tunnel subsection; the circular arc steel mould trolley comprises a first portal, a second portal and a mould supporting mechanism, 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 frame is supported on the supporting surface of the tunnel, the formwork supporting mechanism can complete the procedures of formwork supporting, pouring, forming and the like on the second station under the driving of the first portal frame, and simultaneously the second portal frame is separated from the supporting surface and moves along the extending direction of the tunnel before demoulding, thereby switching the mold supporting mechanism to the first station, supporting the second portal frame on the supporting surface of the tunnel again, completing demolding of the mold supporting mechanism on the first station, and moving to a second station again to realize the working procedures of formwork supporting, pouring, forming and the like of the second lining of the next section of tunnel subsection, and realizing the cycle of integral pouring of the second lining of the tunnel subsection. According to the embodiment of the utility model, the integral pouring of the secondary linings of the multiple tunnel sections is realized through the step-changing operation of the second portal and the formwork supporting mechanism, so that the construction efficiency of the secondary lining is improved.
The construction method of the embodiment of the utility model adopts the arc steel mould trolley, the mould supporting mechanism comprises a mould plate component, a first driving oil cylinder, a third driving oil cylinder and an adjusting screw rod, the mould plate component 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, two ends of the third driving oil cylinder are respectively hinged with one end of the upper mould plate close to the first side mould plate and one end of the first side mould plate 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 and one end of the upper mould plate far away from the first side mould plate; the first driving oil cylinder and the third driving oil cylinder are arranged at positions which enable the first side template and the upper template to be synchronously adjusted through the first driving oil cylinder and the third driving oil cylinder respectively so as to realize template supporting and demolding, the template supporting and demolding efficiency is improved, mutual interference cannot occur when the first side template and the upper template are synchronously demolded, the demolding difficulty is reduced, and the secondary lining construction efficiency of the tunnel is further improved; and the template component can be more drawn in first portal under the drawing of patterns state, has effectively avoided first portal to bump with the inner wall in tunnel at the removal in-process, has improved the security of construction.
In another embodiment of the tunnel construction method based on the arc steel form trolley, the step S1510 includes the following steps:
s1601: and erecting a second steel bar net rack on the inner wall of the tunnel in the extension direction. The second steel bar net rack is bound in the pipe sheet of the tunnel through binding 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 set between steps S1508 and S1509, and in the process of waiting for the reinforced concrete to reach the desired strength, the worker can continue to construct the reinforcing steel bar net rack with the second lining for the next section of tunnel segment, thereby shortening the downtime and improving the construction efficiency of the secondary lining of the tunnel.
The tunnel construction method based on the arc steel form trolley of another embodiment of the utility model comprises 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, and may also be disposed between steps S1503 and S1504, and the first supporting beam applies a force to the inner wall of the tunnel, so that the first portal and the formwork support mechanism can be more accurately positioned with respect to the inner wall of the tunnel, and the first portal and the formwork support mechanism are prevented from slipping to affect the casting quality when the formwork assembly and the inner wall of the tunnel are cast with concrete.
In another embodiment of the present invention, the tunnel construction method based on the arc steel form car includes, before step S1516, the steps of:
s1801: the limiting oil cylinder retracts and is separated from the supporting surface. Step S1801 is generally set between steps S1515 and S1516, or may be set between steps S1511 and S1512, and after the reinforced concrete reaches the desired strength, the formwork assembly and the reinforced concrete are demolded, and since the lower formwork demold requires the lifting device to drive the second gantry to ascend, thereby driving the first gantry and the formwork support assembly to ascend, the limit cylinder needs to retract to ensure that the limit cylinder does not interfere with the movement of the lifting device.
In another embodiment of the tunnel construction method based on the arc steel form trolley, after the step S1502, the method includes the following steps:
s1901: the exterior surface of the stencil assembly is cleaned. The surface of template component can have more material that influences the drawing of patterns after drawing of patterns many times, can improve the effect of drawing of patterns through wasing, carries out template component's washing when formwork mechanism moves to the position of second station moreover, and operating space is bigger, and the workman washs more conveniently, has improved the cleaning efficiency. In addition, in order to further improve the convenience and safety of cleaning of workers, a second reinforcing steel bar net rack can be firstly not erected on the inner wall of the extending direction of the tunnel, but the formwork supporting mechanism is firstly moved to a second station to clean the formwork assembly, the formwork assembly is returned to the first station after the cleaning is finished, then the second reinforcing steel bar net rack is erected, and pouring of a second lining of the next section of tunnel section is continued after the second reinforcing steel bar net rack is erected.
In another embodiment of the tunnel construction method based on the arc steel form car, step S1901 specifically includes the following steps:
s2001: and cleaning the concrete and the 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 a release agent on the outer surfaces of the upper template, the first side template, the second side template and the lower template.
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 are cleaned, so that the demolding efficiency can be improved. And after cleaning, a release agent is coated according to the actual condition, so that the bonding of concrete after subsequent pouring can be reduced, and the flatness of the inner surface of the demolded tunnel secondary lining can be improved.
In another embodiment of the tunnel construction method based on the arc steel form trolley, the method includes the following steps before step S1508:
s2101: and installing a plurality of limiting screw rods, and supporting a plurality of end die units between the template assembly and the inner wall of the tunnel through the limiting screw rods. Before concreting, support the end mould unit and block that the concrete flows from the tip of template subassembly through spacing lead screw, the structure of end mould unit is favorable to improving formwork efficiency to promote secondary lining's the quality of pouring.
In another embodiment of the tunnel construction method based on the arc steel form trolley, the step S1516 is preceded by the following steps:
s2201: and (4) removing the plurality of limiting screw rods and resetting the plurality of end die assemblies. After the reinforced concrete reaches the expected strength, the reset of the end mould unit can be conveniently realized by removing the limiting screw rod, the demoulding efficiency is improved, and the formwork support is conveniently carried out when the second lining of the next section of tunnel subsection is poured.
In another embodiment of the tunnel construction method based on the arc steel form trolley, after the step S2201, the method includes the following steps:
s2301: and installing the embedded part between the template assembly and the inner wall of the tunnel through the communication port.
S2302: and sealing the communicating port by using a sealing strip.
It can be understood that after the end die unit supports, the embedded part can be placed through the communication port, the construction efficiency of the embedded part can be improved by placing the embedded part through the communication port, and the construction difficulty of the embedded part is reduced. After the embedded part is constructed, the communication port can be sealed through the sealing strips such as the 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 mold 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 those skilled in the art without departing from the gist of the present invention.

Claims (9)

1. Circular arc steel mould platform truck, its characterized in that includes:
a first portal;
the front end and the rear end of the second portal are provided with lifting devices, the second portal penetrates through the first portal, and the second portal and the first portal can move relatively;
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 upper template is positioned above the first portal, and the first side template and the second side template are respectively positioned on the left side and the right side of the first portal; two ends of the first driving oil cylinder are respectively hinged with the first side template and the first door frame, two ends of the second driving oil cylinder are respectively hinged with the second side template and the first door frame, and 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, so that the upper template and the second side template are separated or connected with each other;
one end of the adjusting screw rod is hinged with one end, far away from the first side template, of the upper template, the other end of the adjusting screw rod is hinged with the first portal, and the adjusting screw rod is used for adjusting the position of the upper template or supporting the upper template;
the length of the second door frame along the front-back direction is L1The length of the template component along the front-back direction is L2，L1And L2Satisfy L1/L2≥2。
2. The circular arc steel die trolley according to claim 1, further comprising a hydraulic pump, a reversing valve, and a synchronizing valve, wherein the hydraulic pump, the reversing valve, the synchronizing valve, and the plurality of first driving cylinders are connected to form a synchronizing circuit.
3. The circular arc steel form trolley of claim 1, wherein the second gantry comprises a guide rail extending in a fore-and-aft direction, and the first gantry comprises a guide wheel in rolling engagement with the guide rail.
4. The circular arc steel die trolley according to claim 3, wherein at least two guide rails are arranged at intervals at the upper end and the lower end of the second portal, at least two rows of guide wheel sets corresponding to the guide rails are arranged at the upper end and the lower end of the first portal, each row of guide wheel sets comprises a plurality of guide wheels, and the plurality of guide wheels are arranged at intervals along the extending direction of the guide rails.
5. The circular arc steel die trolley according to claim 1, wherein the front end and the rear end of the first portal are provided with first supporting devices, each supporting device comprises a limiting oil cylinder and a first supporting beam, one end of each limiting oil cylinder is connected with the first portal, and the other end of each limiting oil cylinder is connected with the first supporting beam, so that the first supporting beam is abutted against the wall surface of the tunnel or the steel bars fixed on the wall surface of the tunnel.
6. The circular arc steel die trolley according to claim 1, wherein the lifting device comprises at least two support legs, the at least two support legs are arranged at intervals along the left and right direction of the second gantry, each support leg comprises a lifting oil cylinder, a fixing piece, a guide piece and a sliding piece, the guide pieces are fixedly connected to the fixing pieces, cavities are formed inside the guide pieces, the sliding pieces are arranged in the cavities, one end of each lifting oil cylinder is connected with the fixing piece, and the other end of each lifting oil cylinder is connected with the sliding pieces, so that the sliding pieces can slide along the axial direction of the guide pieces.
7. The circular arc steel die trolley according to claim 1, wherein second supporting devices are arranged at the front end and the rear end of the second portal respectively, each second supporting device comprises a connecting piece, a second supporting beam and an adjusting oil cylinder, the connecting piece is connected with the lifting device, two moving pieces are arranged at the lower end of the lifting device, the two moving pieces are arranged at intervals in the front-rear direction of the lifting device, the second supporting beam extends in the left-right direction and is connected with the moving pieces in a sliding manner, one end of the adjusting oil cylinder is connected with the connecting piece, and the other end of the adjusting oil cylinder is connected with the second supporting beam so as to drive the second supporting beam and the second portal to move relatively.
8. The circular arc steel die trolley according to claim 1, wherein the formwork supporting mechanism further comprises a plurality of end formwork units, the end formwork units are arranged at the end of the moving direction of the formwork assembly and are arranged around the formwork assembly, each end formwork unit comprises a first baffle plate, a second baffle plate, a limiting part, a rotating part, a supporting rod and a limiting lead screw, the first baffle plate and the second baffle plate are arranged at intervals along the radial direction of the formwork assembly, the first baffle plate is connected with the second baffle plate through the limiting part, one end of the rotating part is fixedly connected with the first baffle plate and/or the second baffle plate, the other end of the rotating part is hinged with the formwork assembly so that the first baffle plate and the second baffle plate can be rotatably connected with the formwork assembly, and one end of the supporting rod is fixedly connected with the formwork assembly, the other end of the supporting rod is hinged to one end of the limiting screw rod, the other end of the limiting screw rod is hinged to the first baffle or the second baffle, and the limiting screw rod is used for adjusting or fixing the position of the end die unit.
9. The circular arc steel die trolley according to claim 1, wherein the adjusting screw comprises a first screw, a second screw, an adjusting sleeve, a first nut and a second nut, the first screw and the second screw are respectively screwed at two ends of the adjusting sleeve, the first nut is screwed with the first screw to limit the relative rotation of the first screw and the adjusting sleeve, and the second nut is screwed with the second screw to limit the relative rotation of the second screw and the adjusting sleeve.
CN202123455169.0U 2021-12-31 2021-12-31 Circular arc steel mould trolley Active CN216950389U (en)

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Application Number Priority Date Filing Date Title
CN202123455169.0U CN216950389U (en) 2021-12-31 2021-12-31 Circular arc steel mould trolley

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202123455169.0U CN216950389U (en) 2021-12-31 2021-12-31 Circular arc steel mould trolley

Publications (1)

Publication Number Publication Date
CN216950389U true CN216950389U (en) 2022-07-12

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