Telescopic secondary lining trolley for tunnel widening section formwork

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly relates to a tunnel widening section formwork telescopic type secondary lining trolley which comprises a trolley door frame and a formwork system, a telescopic cross beam is arranged at the top end of the trolley door frame, the formwork system comprises a formwork unit I and a formwork unit II, and the formwork unit I and the formwork unit II each comprise a top formwork, a hinged formwork and a side formwork. The top die is hinged to the top end of the hinged die, the side die is hinged to the bottom end of the hinged die, the hinged die is arranged at the end of the telescopic cross beam, the free end of the top die in the formwork unit I and the free end of the top die in the formwork unit II are spliced, and the splicing face is an inclined face. The position of the template system is adjusted through an oil cylinder, during contraction, the top die is folded on the telescopic cross beam in a crossed mode, and the side die is recycled; when the formwork is stretched, the formwork is fixedly supported on the trolley portal through the detachable supporting piece, and the top formwork and the side formworks are unfolded. According to the utility model, the overall height and the overall width of the secondary lining trolley can be reduced without dismounting the template system, so that the secondary lining trolley can pass through the section of the main tunnel, the workload of construction in the tunnel is greatly reduced, the risk of construction in the tunnel is reduced, and the safety and the efficiency of construction in the tunnel are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, and in particular relates to a retractable second lining trolley for a tunnel widening section template. Background Art

[0002] Generally speaking, in highway tunnel construction, tunnels longer than 500m will have a widening section for temporary parking or emergency use every 500m. The widening section is about 3m wider than the main tunnel. As a result, the difference between the widening section and the main tunnel section is large, and a separate template or trolley is required for secondary lining operations. When a conventional secondary lining trolley enters the next widening section after the construction of one widening section is completed, the trolley needs to be dismantled so that it can pass through the main tunnel section (ordinary section). After the trolley enters the next widening section, the template is installed again. That is, the conventional secondary lining trolley needs to remove the template once and install the template once from one widening working surface to the next widening working surface. If there are several widening sections in the tunnel, it needs to be dismantled and installed several times. Installing and disassembling the trolley template in the widening section tunnel is more troublesome, more risky, longer, more labor-intensive, and less efficient, which is inconsistent with the existing tunnel construction management concept. Utility Model Content

[0003] The utility model aims to provide a retractable second lining trolley for a tunnel widening section template, so as to solve the problem that the template of the widening section second lining trolley needs to be dismantled before installation and use.

[0004] In order to achieve the above-mentioned purpose, the scheme of the utility model is as follows: a retractable second lining trolley for tunnel widening section template, including a trolley portal and a template system, a telescopic beam is provided at the top of the trolley portal, the template system includes a template unit I and a template unit II, both template unit I and template unit II include a top template, a hinged template and a side template, the top template is hinged to the top end of the hinged template, the side template is hinged to the bottom end of the hinged template, the hinged template is arranged at the end of the telescopic beam, the free end of the top template in the template unit I is spliced ​​with the free end of the top template in the template unit II, and the splicing surface is an inclined surface, which is convenient for the two top templates to cross-fold; the template system adjusts the distance from the trolley portal through the oil cylinder, and when shrinking, the top template is cross-folded on the telescopic beam, and the side template is recovered; when extending, the template system is fixedly supported on the trolley portal by a detachable support member, and the top template and the side template are unfolded.

[0005] The working principle and beneficial effects of this solution are as follows: In this solution, the top molds in the template unit I and the template unit II are successively approached to the telescopic beam under the action of the corresponding oil cylinders. At the same time, the hinged molds at both ends of the telescopic beam are approached to the trolley gantry under the action of the corresponding oil cylinders, so that the top mold that is folded later is located above the top mold that is folded earlier, realizing the cross-folding of the template system, thereby reducing the overall height and overall width of the second lining trolley, and thus allowing the second lining trolley to pass through the main tunnel section. In summary, this solution realizes the contraction or extension of the template system through the oil cylinder. When passing through the main tunnel section, it is only necessary to remove the oil cylinders corresponding to the detachable support and the side molds, without removing the template system, which greatly reduces the workload of in-tunnel construction, reduces the risk of in-tunnel construction, and improves the safety and efficiency of in-tunnel construction.

[0006] Optionally, the cylinder includes a top mold cylinder, a side mold cylinder and a horizontal cylinder, one end of the top mold cylinder is hinged to the top mold, and the other end of the top mold cylinder is hinged to the telescopic beam; one end of the side mold cylinder is hinged to the side mold, and the other end of the side mold cylinder is detachably connected to the trolley gantry; the horizontal cylinder is used to drive the telescopic beam to extend and retract.

[0007] In this solution, the top mold cylinder is used to fold the top mold, thereby reducing the overall height of the second lining trolley; the side mold cylinder is used to swing the side mold relative to the hinged mold; the horizontal cylinder is used to extend and retract the telescopic beam, thereby achieving the translation of the hinged mold, thereby reducing the overall width of the second lining trolley.

[0008] Optionally, a supporting longitudinal beam is provided between the telescopic beam and the trolley gantry, the horizontal oil cylinder is fixedly installed on the top of the trolley gantry, and the output end of the horizontal oil cylinder is connected to the telescopic end of the telescopic beam.

[0009] In this solution, the presence of the supporting longitudinal beam allows for installation space for the horizontal cylinder between the telescopic crossbeam trolley door frames.

[0010] Optionally, the telescopic crossbeam comprises an outer crossbeam sleeve and an inner crossbeam sleeve, and the inner crossbeam sleeve is axially slidably connected inside the outer crossbeam sleeve.

[0011] In this solution, the inner sleeve of the cross beam is axially slidably connected inside the outer sleeve of the cross beam, and the telescopic structure is stable.

[0012] Optionally, a limiting frame for translation of the outer sleeve of the cross beam and the inner sleeve of the cross beam is fixedly installed on the top end of the supporting longitudinal beam, and a cross beam guide wheel is installed in the limiting frame.

[0013] In this solution, a limit frame is used to limit the horizontal sliding of the outer sleeve of the beam and the inner sleeve of the beam, and the beam guide wheel is used to convert the sliding friction into rolling friction, thereby reducing the friction force received by the telescopic beam during the extension and retraction process.

[0014] Optionally, the detachable support member includes a supporting screw jack and a top mold supporting column.

[0015] In this solution, the side molds are supported by supporting screw jacks, and the top mold support columns are used to support the top mold.

[0016] Optionally, a roller is installed at the bottom end of the side mold.

[0017] In this solution, the rollers at the bottom of the side mold facilitate the movement of the side mold, effectively avoiding scratches during movement, and the second lining trolley moves more smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a retractable secondary lining trolley for a tunnel widening section template in an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the template after being folded in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The marks in the drawings of the specification include: trolley gantry 1, supporting longitudinal beam 2, telescopic crossbeam 3, crossbeam inner sleeve 301, crossbeam outer sleeve 302, limit frame 4, crossbeam guide wheel 5, top mold Ⅰ6, articulated mold Ⅰ7, side mold Ⅰ8, top mold Ⅱ9, articulated mold Ⅱ10, side mold Ⅱ11, top mold cylinder Ⅰ12, top mold cylinder Ⅱ13, side mold cylinder Ⅰ14, side mold cylinder Ⅱ15, horizontal cylinder Ⅰ16, horizontal cylinder Ⅱ17, connecting seat 18, supporting jack screw 19, top mold support column 20, roller 21.

[0022] Example

[0023] This embodiment is basically Figure 1 As shown: a retractable secondary lining trolley for tunnel widening section formwork, comprising a trolley portal frame 1 and a formwork system, a supporting longitudinal beam 2 is provided at the top of the trolley portal frame 1, a telescopic crossbeam 3 is provided on the supporting longitudinal beam 2, the telescopic crossbeam 3 comprises a crossbeam inner sleeve 301 and a crossbeam outer sleeve 302, the crossbeam inner sleeve 301 is axially slidably connected in the crossbeam outer sleeve 302; a limiting frame 4 for translational movement of the crossbeam inner sleeve 301 and the crossbeam outer sleeve 302 is fixedly installed at the top of the supporting longitudinal beam 2, and a crossbeam guide wheel 5 is installed in the limiting frame 4.

[0024] The template system includes template unit I and template unit II. Template unit I includes top template I6, hinged template I7 ​​and side template I8. Template unit II includes top template II9, hinged template II10 and side template II11. Top template I6 is hinged to the top of hinged template I7, and side template I8 is hinged to the bottom of hinged template I7. Top template II9 is ​​hinged to the top of hinged template II10, and side template II11 is hinged to the bottom of hinged template II10. Hinge template I7 ​​is fixedly installed at the left end of the inner sleeve 301 of the crossbeam, and hinged template II10 is fixedly installed at the right end of the outer sleeve 302 of the crossbeam. The free ends of top template I6 and top template II9 are spliced ​​and the splicing surface is an inclined surface, so that top template I6 and top template II9 can be deflected downward at their respective hinge points to achieve folding.

[0025] The template is adjusted to fit the tunnel contour by adjusting the distance between it and the trolley portal frame 1 through the oil cylinder. When contracting, the template is folded on the telescopic crossbeam 3; when extending, the template is fixedly supported on the trolley portal frame 1 through a detachable support. Among them, the oil cylinder includes top mold cylinder Ⅰ12, top mold cylinder Ⅱ13, side mold cylinder Ⅰ14, side mold cylinder Ⅱ15, horizontal cylinder Ⅰ16 and horizontal cylinder Ⅱ17. One end of the top mold cylinder Ⅰ12 is hinged to the top mold Ⅰ6, and the other end of the top mold cylinder Ⅰ12 is hinged to the inner sleeve 301 of the crossbeam. One end of the top mold cylinder Ⅱ13 is hinged to the top mold Ⅱ9, and the other end of the top mold cylinder Ⅱ13 is hinged to the outer sleeve 302 of the crossbeam. One end of the side mold cylinder Ⅰ14 is hinged to the side mold Ⅰ8, and the other end of the side mold cylinder Ⅰ14 is detachably connected to the trolley gantry 1; one end of the side mold cylinder Ⅱ15 is hinged to the side mold Ⅱ11, and the other end of the side mold cylinder Ⅱ15 is detachably connected to the trolley gantry 1. The horizontal cylinder Ⅰ16 is used to drive the inner sleeve 301 of the crossbeam to translate, and the horizontal cylinder Ⅱ17 is used to drive the outer sleeve 302 of the crossbeam to translate. Specifically, the inner sleeve 301 of the crossbeam and the outer sleeve 302 of the crossbeam can be detachably installed with a connecting seat 18. The horizontal cylinder Ⅰ16 is detachably installed on the supporting longitudinal beam 2 located on the left side, and the output end of the horizontal cylinder Ⅰ16 is connected to the connecting seat 18 on the inner sleeve 301 of the crossbeam; the horizontal cylinder Ⅱ17 is detachably installed on the supporting longitudinal beam 2 located on the right side, and the output end of the horizontal cylinder Ⅱ17 is connected to the connecting seat 18 on the outer sleeve 302 of the crossbeam. In another embodiment, both the horizontal cylinder I 16 and the horizontal cylinder II 17 can be detachably installed on the supporting longitudinal beam 2 located in the middle.

[0026] The removable support members include a support screw 19 and a top mold support column 20. The support screw 19 is used to support the side mold I8 and the side mold II11, and the support screw 19 can be removed; the top mold support column 20 is used to support the top mold I6 and the top mold II9, and the top mold support column 20 can also be removed. In addition, rollers 21 are installed at the bottom ends of the side mold I8 and the side mold II11 to facilitate the movement of the side mold I8 and the side mold II11 to prevent them from being scratched.

[0027] In this embodiment, when the secondary lining trolley needs to enter the next widening section, the supporting screw jack 19, the side mold oil cylinder I14 and the side mold oil cylinder II15 are removed, and the side molds I8 and II11 lose their lateral support and can move toward the trolley door frame 1. Subsequently, the top mold support column 20 is removed, and the top mold oil cylinder II13 retracts, pulling the top mold II9 to rotate counterclockwise around its hinge point with the hinge mold II10, and the top mold II9 gradually approaches the telescopic beam 3, thereby realizing the folding of the top mold II9. Next, the top mold cylinder Ⅰ12 retracts, pulling the top mold Ⅰ6 to rotate clockwise around its hinge point with the articulated mold Ⅰ7, and the top mold Ⅰ6 gradually approaches the telescopic beam 3; at the same time, the horizontal cylinder Ⅰ16 and the horizontal cylinder Ⅱ17 are started, pulling the inner sleeve 301 of the beam to slide to the right and the outer sleeve 302 of the beam to slide to the left, respectively, so that the articulated mold Ⅰ7 and the articulated mold Ⅱ10 move toward the center direction of the trolley gantry 1, and the side mold Ⅰ8 and the side mold Ⅱ11 also move toward the center direction of the trolley gantry 1 together.

[0028] During the working process of horizontal cylinder Ⅰ16 and horizontal cylinder Ⅱ17, due to their limited travel, after horizontal cylinder Ⅰ16 and horizontal cylinder Ⅱ17 pull the telescopic beam 3 back each time, the worker will dismantle the connecting seat 18, and install it on the telescopic beam 3 after horizontal cylinder Ⅰ16 and horizontal cylinder Ⅱ17 are reset (multiple connecting seat 18 installation sites are designed on the inner sleeve 301 and the outer sleeve 302 of the beam), until the overall length of the telescopic beam 3 is shortened to the desired position. When the overall length of the telescopic beam 3 is shortened to the desired position, the top mold Ⅰ6 rotates clockwise to the desired position, and the top mold Ⅰ6 covers the top mold Ⅱ9. At this point, the top mold Ⅰ6 is folded, and the translation of the articulated mold Ⅰ7 and the side mold Ⅰ8 is completed at the same time. Figure 2 As shown. In this way, the overall height of the second lining trolley is reduced, the overall width of the second lining trolley is reduced, and the second lining trolley can enter the next widened section through the positive hole section. After entering the next widened section, the side mold I8 (side mold I8 and side mold II11) and the top mold I6 (top mold I6 and top mold II9) are lifted and supported, and the order is opposite to that when folding.

[0029] In summary, in this embodiment, the construction personnel only need to remove and install the detachable support, the side mold oil cylinder I14 and the side mold oil cylinder II15, without removing and installing the template, which greatly reduces the workload of the tunnel construction, reduces the risk of tunnel construction, and improves the safety and efficiency of tunnel construction. In addition, the design of the roller 21 can effectively prevent the side mold I8 and the side mold II11 from swinging and being scratched, so as to facilitate the smooth movement of the secondary lining trolley.

[0030] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the utility model. The specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A retractable secondary lining trolley for tunnel widening section template, including a trolley portal and a template system, characterized in that: A telescopic beam is provided at the top of the trolley gantry, and the template system includes template unit I and template unit II. Template unit I and template unit II both include a top mold, an articulated mold and a side mold. The top mold is hinged to the top of the articulated mold, and the side mold is hinged to the bottom of the articulated mold. The articulated mold is provided at the end of the telescopic beam. The free end of the top mold in template unit I is spliced ​​with the free end of the top mold in template unit II, and the splicing surface is an inclined surface, so as to facilitate the cross-folding of the two top molds. The template system adjusts the distance from the trolley gantry through the oil cylinder. When shrinking, the top mold is cross-folded on the telescopic beam, and the side mold is recovered. When extending, the template system is fixedly supported on the trolley gantry through a detachable support, and the top mold and the side mold are unfolded.

2. The retractable secondary lining trolley for tunnel widening section template according to claim 1 is characterized in that: The cylinder includes a top mold cylinder, a side mold cylinder and a horizontal cylinder. One end of the top mold cylinder is hinged to the top mold, and the other end of the top mold cylinder is hinged to the telescopic beam; one end of the side mold cylinder is hinged to the side mold, and the other end of the side mold cylinder is detachably connected to the trolley gantry; the horizontal cylinder is used to drive the telescopic beam to extend and retract.

3. The retractable secondary lining trolley for tunnel widening section template according to claim 2 is characterized in that: A supporting longitudinal beam is provided between the telescopic crossbeam and the trolley gantry, the horizontal oil cylinder is fixedly installed on the top of the trolley gantry, and the output end of the horizontal oil cylinder is connected to the telescopic end of the telescopic crossbeam.

4. The retractable secondary lining trolley for tunnel widening section template according to claim 3 is characterized in that: The telescopic crossbeam comprises a crossbeam outer sleeve and a crossbeam inner sleeve, and the crossbeam inner sleeve is axially slidably connected inside the crossbeam outer sleeve.

5. The retractable secondary lining trolley for tunnel widening section template according to claim 4 is characterized in that: A limiting frame for translation of the outer sleeve of the cross beam and the inner sleeve of the cross beam is fixedly installed on the top end of the supporting longitudinal beam, and a cross beam guide wheel is installed in the limiting frame.

6. The retractable secondary lining trolley for tunnel widening section template according to claim 1 is characterized in that: The detachable support member comprises a supporting screw jack and a top mold supporting column.

7. The retractable secondary lining trolley for tunnel widening section template according to claim 1 is characterized in that: A roller is installed at the bottom end of the side mold.

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