A device for tunneling by open cut method

Abstract

This utility model relates to the field of tunnel construction, specifically a slipform device for an invert arch in an open-cut tunnel. It includes a span beam, a drive mechanism for the movement of the drive device at the bottom of the span beam, a support mechanism for supporting the movement of the slipform, and a formwork moving mechanism for moving the formwork. This slipform device for an invert arch in an open-cut tunnel utilizes a propulsion cylinder to push a swing plate to tilt and swing, adjusting the positions of the left and right wing formwork. The height of the formwork can also be adjusted using the left and right wing cylinders, facilitating adjustments according to construction needs. After concrete is poured between the central formwork and the tunnel wall, the left and right wing formwork can be directly connected to the central formwork to form a sealed pouring cavity. Concrete can then be poured into the sealed cavity along the upper edges of the left and right wing formwork. This construction method eliminates the need for repeated swinging of the central formwork for large-area pouring, and reduces waiting time, promoting efficient and high-precision construction.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction, specifically to a slipform device for the invert arch of an open-cut tunnel. Background Technology

[0002] The cut-and-cover method refers to an underground engineering construction method in which the ground is first excavated, the lining is constructed in the open, and then the ground is covered and backfilled. It is mostly used for shallow tunnels. The cut-and-cover method is the most basic and commonly used construction method in soft soil underground engineering. The invert arch is a reverse arch structure set at the bottom of the tunnel to improve the stress conditions of the superstructure. It is one of the main components of the tunnel structure. On the one hand, it effectively transfers the ground pressure above the tunnel to the underground through the tunnel sidewall structure or the load on the road surface, and on the other hand, it effectively resists the reaction force from the strata below the tunnel. The invert arch and the secondary lining form the whole of the tunnel, increasing the structural stability.

[0003] Slipform construction is a construction technique in cast-in-place concrete engineering. During slipform construction, the formwork is assembled in one go, with an operating platform for construction workers on it. The formwork is simultaneously lifted and slid along the surface of the cast-in-place concrete while concrete is being poured, using hydraulic or other lifting devices from bottom to top. Compared with conventional construction methods, this technique offers advantages such as faster construction speed, better overall structural performance, higher degree of mechanization, savings in materials and labor required for formwork and scaffolding, easier disassembly and flexible assembly of the formwork, and reusability. Combining slipform with other construction techniques (such as prefabrication, masonry, or other formwork methods) can simplify construction processes and achieve better overall economic benefits.

[0004] Traditional slipform installations for cut-and-cover tunnel inverts require a long waiting period after concrete is poured between the central formwork and the tunnel wall before the formwork can be moved. This waiting time is not conducive to efficient construction. Furthermore, after pouring concrete for one section, the formwork needs to be moved with significant displacement to align it with the edge of the solidified concrete before pouring more concrete. This repeated and cumbersome movement of the formwork is not conducive to high-precision and efficient construction.

[0005] In view of this, we propose a slipform device for the invert arch of open-cut tunnels in order to solve the problems existing in the existing devices. Utility Model Content

[0006] The purpose of this utility model is to provide a slipform device for the invert arch of an open-cut tunnel to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a slipform device for the invert arch of an open-cut tunnel, including a span beam, a drive mechanism for driving the device to move is provided at the bottom of the span beam, and a support mechanism for supporting the movement of the slipform and a mold moving mechanism for moving the mold are also provided on the span beam.

[0007] Preferably, the driving mechanism includes a transmission rod, a drive motor, and guide wheels. The drive motor is fixed at the four corners of the bottom of the span beam, and the transmission rod is also connected to the four corners of the bottom of the span beam through bearings. The guide wheels are fixed at the inner end of the transmission rod, and the output shaft of the drive motor is fixedly connected to the outer end of the transmission rod.

[0008] Preferably, the support mechanism includes a vertical main support plate, a horizontal hanging plate, a swing plate, a bottom support plate, a propulsion cylinder, a guide roller frame, and guide rollers. The vertical main support plate is welded and fixed at the center of the upper surface of the span beam. The horizontal hanging plate is welded and fixed on the side of the front of the vertical main support plate. Two swing plates are provided at the bottom of the horizontal hanging plate. The bottom support plate is also welded and fixed at the bottom of the horizontal hanging plate. The propulsion cylinder is fixed on the bottom support plate. The guide roller frame is fixed on the extended end of the propulsion cylinder, and guide rollers are provided on the guide roller frame. The mold moving mechanism is provided on the support mechanism.

[0009] Preferably, the mold-shifting mechanism includes a central cylinder, a central template, a left wing cylinder, a left wing template, a right wing cylinder, and a right wing template. The central cylinder is fixed at the bottom center of the transverse hanging plate, and the central template is fixed at the extended end of the central cylinder. The left wing cylinder is fixed on the left side swing plate, and the left wing template is fixed at the extended end of the left wing cylinder. The right wing cylinder is fixed on the right side swing plate, and the right wing template is fixed at the extended end of the right wing cylinder. The guide roller frame is respectively supported on the bottom of the corresponding side swing plate. The central template, left wing template, and right wing template are all located diagonally above the front side of the span beam.

[0010] Preferably, the central cylinder is located between the left wing cylinder and the right wing cylinder, the extended end of the central cylinder is vertically downward, and the left wing cylinder and the right wing cylinder are arranged at an angle.

[0011] Preferably, the central template, left wing template and right wing template are all arc-shaped structures, and the two ends of the central template are seamlessly connected to the ends of the left wing template and the right wing template, respectively.

[0012] Preferably, the upper end of the swing plate is movably connected to the horizontal hanging plate via a hinge.

[0013] Preferably, a reinforcing plate is welded and fixed to the side of the bottom of the base plate, and the propulsion cylinder is also fixed to the reinforcing plate.

[0014] Preferably, a control panel is also provided on the horizontal hanging plate.

[0015] Compared with the prior art, the present invention has the following advantages.

[0016] In this invention, swing plates are set on both sides of the central template, and left and right wing cylinders are set on the two swing plates respectively. The left wing template is set on the left wing cylinder and the right wing template is set on the right wing cylinder. The structure design of three sets of templates is adopted, which can greatly improve the efficiency of construction operations compared with the traditional single template.

[0017] In this invention, a bottom support plate, a propulsion cylinder, a guide roller frame, and a guide roller assembly are installed below the horizontal hanging plate. The propulsion cylinder pushes the swing plate to tilt and swing, which can adjust the position of the left and right wing templates. The left and right wing cylinders can also be used to adjust their height, which helps to adjust according to construction needs. After the concrete is poured between the middle template and the inner wall of the tunnel, the left and right wing templates can be directly connected to the middle template to form a sealed pouring cavity. Concrete can continue to be poured into the sealed cavity along the upper edge of the left and right wing templates. With this construction method, large-area pouring can be carried out without repeatedly swinging the middle template, and the waiting time is short, which is conducive to efficient and high-precision construction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the left and right wing templates when unfolded in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the central template when it is raised in this utility model;

[0021] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Span beam; 2. Transmission rod; 3. Drive motor; 4. Guide wheel; 5. Vertical main support plate; 6. Horizontal hanging plate; 7. Central cylinder; 8. Central template; 9. Swing plate; 10. Left wing cylinder; 11. Left wing template; 12. Right wing cylinder; 13. Right wing template; 14. Bottom support plate; 15. Propulsion cylinder; 16. Guide roller frame; 17. Guide roller; 18. Hinge; 19. Reinforcing plate; 20. Control console. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a slipform device for an invert arch of an open-cut tunnel, including a span beam 1, a driving mechanism for the drive device to move is provided at the bottom of the span beam 1, and a support mechanism for supporting the movement of the slipform and a moving mechanism for moving the mold are also provided on the span beam 1, forming an integral slipform device for an invert arch of an open-cut tunnel.

[0025] In this embodiment, the driving mechanism includes a transmission rod 2, a drive motor 3, and a guide wheel 4. The drive motor 3 is fixed at the four corners of the bottom of the cross beam 1. The transmission rod 2 is also connected to the four corners of the bottom of the cross beam 1 through bearings. The guide wheel 4 is fixed at the inner end of the transmission rod 2. The output shaft of the drive motor 3 is fixedly connected to the outer end of the transmission rod 2 for driving the device to move, which facilitates large-area concrete pouring construction at the bottom of the tunnel.

[0026] In this embodiment, the support mechanism includes a vertical main support plate 5, a horizontal hanging plate 6, a swing plate 9, a bottom support plate 14, a propulsion cylinder 15, a guide roller frame 16, and a guide roller 17. The vertical main support plate 5 is welded and fixed at the center of the upper surface of the span beam 1. The horizontal hanging plate 6 is welded and fixed on the side of the front of the vertical main support plate 5. Two swing plates 9 are provided at the bottom of the horizontal hanging plate 6. The bottom support plate 14 is also welded and fixed at the bottom of the horizontal hanging plate 6. The propulsion cylinder 15 is fixed on the bottom support plate 14. The guide roller frame 16 is fixed on the extended end of the propulsion cylinder 15, and the guide roller 17 is provided on the guide roller frame 16. The formwork shifting mechanism is provided on the support mechanism and is used to advance and adjust the distance between the left wing formwork 11 and the right wing formwork 13 and the middle formwork 8, so as to facilitate the pouring of concrete into the sealed cavity formed in the middle.

[0027] In this embodiment, the formwork moving mechanism includes a central cylinder 7, a central template 8, a left wing cylinder 10, a left wing template 11, a right wing cylinder 12, and a right wing template 13. The central cylinder 7 is fixed at the bottom center of the transverse hanging plate 6, and the central template 8 is fixed at the extended end of the central cylinder 7. The left wing cylinder 10 is fixed on the left swing plate 9, and the left wing template 11 is fixed at the extended end of the left wing cylinder 10. The right wing cylinder 12 is fixed on the right swing plate 9, and the right wing template 13 is fixed at the extended end of the right wing cylinder 12. The guide roller frame 16 is respectively supported at the bottom of the corresponding side swing plate 9. The central template 8, the left wing template 11, and the right wing template 13 are all located diagonally above the front side of the span beam 1, which facilitates the adjustment of the concrete pouring position according to the needs. Large-area pouring can be carried out without multiple swings of the central template 8, and the waiting time is short, which is conducive to efficient and high-precision construction.

[0028] In this embodiment, the central cylinder 7 is located between the left wing cylinder 10 and the right wing cylinder 12. The extended end of the central cylinder 7 is vertically downward, while the left wing cylinder 10 and the right wing cylinder 12 are arranged at an angle to facilitate high-precision and rapid docking.

[0029] In this embodiment, the middle template 8, the left wing template 11 and the right wing template 13 are all arc-shaped structures, and the two ends of the middle template 8 are seamlessly connected to the ends of the left wing template 11 and the right wing template 13, respectively, to form a sealed pouring cavity and ensure the smoothness of the concrete at the bottom of the tunnel.

[0030] In this embodiment, the upper end of the swing plate 9 is movably connected to the horizontal hanging plate 6 through the hinge 18, which facilitates the swing adjustment of the left wing template 11 and the right wing template 13.

[0031] In this embodiment, a reinforcing plate 19 is welded and fixed to the side of the bottom of the bottom support plate 14, and the propulsion cylinder 15 is also fixed to the reinforcing plate 19 to further fix the propulsion cylinder 15 and increase the overall stability.

[0032] In this embodiment, a control console 20 is also provided on the horizontal hanging plate 6 for controlling the operation of the device.

[0033] This utility model and its advantages: Guide rails are laid on both sides of the excavated tunnel. The open-cut tunnel invert arch sliding formwork device is set up on the guide rails. The two guide rail wheels 4 on the right side are placed on the right guide rail, and the two guide rail wheels 4 on the left side are placed on the left guide rail. Then, the control console 20 is connected to the drive motor 3, the central cylinder 7, the left wing cylinder 10, the right wing cylinder 12, and the two propulsion cylinders 15. The control console 20 is then connected to a power source to operate the device. Then, the drive motor 3 is turned on, causing the guide rail wheels 4 to roll along the guide rail, thus driving the device forward to the concrete pouring area. Then, as... Figure 2 As shown, the left and right side propulsion cylinders 15 are activated, extending them and pushing the swing plate 9 outwards. The left swing plate 9, along with the left wing cylinder 10 and the left wing template 11, tilts to the left, while the right swing plate 9, along with the right wing cylinder 12 and the right wing template 13, tilts to the right, thus moving the left wing template 11 and the right wing template 13 away from the central template 8. Then, the central cylinder 7 is extended, lowering the central template 8 to form a concrete pouring cavity between it and the tunnel wall. Concrete can then be poured into the cavity from both ends of the central template 8. After the concrete pouring in the middle of the tunnel is completed, as shown... Figure 1 As shown, the left wing template 11 and the right wing template 13 are respectively attached to the two ends of the middle template 8. Concrete can then be poured into the cavity from the top openings of the left wing template 11 and the right wing template 13 without having to adjust the tunnel pouring position by swinging the middle template 8 left and right. After pouring is completed, the middle cylinder 7, the left wing cylinder 10 and the right wing cylinder 12 are retracted at once to separate the template from the concrete. Then the device is activated to move forward. This construction method can be used to pour large areas without swinging the middle template 8 multiple times, and the waiting time is short, which is conducive to efficient and high-precision construction.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A slipform device for the invert arch of an open-cut tunnel, comprising a span beam (1), characterized in that: The bottom of the span beam (1) is provided with a drive mechanism for the drive device to move, and the span beam (1) is also provided with a support mechanism for supporting the movement of the sliding mold and a mold moving mechanism for moving the mold. The driving mechanism includes a transmission rod (2), a drive motor (3) and a guide wheel (4). The drive motor (3) is fixed at the four corners of the bottom of the cross beam (1). The transmission rod (2) is also connected to the four corners of the bottom of the cross beam (1) by bearings. The guide wheel (4) is fixed at the inner end of the transmission rod (2). The output shaft of the drive motor (3) is fixedly connected to the outer end of the transmission rod (2). The support mechanism includes a vertical main support plate (5), a horizontal hanging plate (6), a swing plate (9), a bottom support plate (14), a propulsion cylinder (15), a guide roller frame (16), and a guide roller (17). The vertical main support plate (5) is welded and fixed at the center of the upper surface of the span beam (1). The horizontal hanging plate (6) is welded and fixed on the side of the front of the vertical main support plate (5). Two swing plates (9) are provided at the bottom of the horizontal hanging plate (6). The bottom support plate (14) is also welded and fixed at the bottom of the horizontal hanging plate (6). The propulsion cylinder (15) is fixed on the bottom support plate (14). The guide roller frame (16) is fixed on the extended end of the propulsion cylinder (15), and the guide roller (17) is provided on the guide roller frame (16). The mold moving mechanism is set on the support mechanism. The mold-moving mechanism includes a central cylinder (7), a central template (8), a left wing cylinder (10), a left wing template (11), a right wing cylinder (12), and a right wing template (13). The central cylinder (7) is fixed at the bottom center of the horizontal hanging plate (6). The central template (8) is fixed at the extended end of the central cylinder (7). The left wing cylinder (10) is fixed on the left swing plate (9). The left wing template (11) is fixed at the extended end of the left wing cylinder (10). The right wing cylinder (12) is fixed on the right swing plate (9). The right wing template (13) is fixed at the extended end of the right wing cylinder (12). The guide roller frame (16) is respectively supported at the bottom of the corresponding side swing plate (9). The central template (8), the left wing template (11), and the right wing template (13) are all located diagonally above the front side of the cross beam (1).

2. The slipform device for the invert arch of an open-cut tunnel according to claim 1, characterized in that: The central cylinder (7) is located between the left wing cylinder (10) and the right wing cylinder (12). The extended end of the central cylinder (7) is vertically downward, and the left wing cylinder (10) and the right wing cylinder (12) are arranged at an angle.

3. The slipform device for the invert arch of an open-cut tunnel according to claim 1, characterized in that: The central template (8), left wing template (11) and right wing template (13) are all arc-shaped structures, and the two ends of the central template (8) are seamlessly connected to the ends of the left wing template (11) and right wing template (13), respectively.

4. The slipform device for the invert arch of an open-cut tunnel according to claim 1, characterized in that: The upper end of the swing plate (9) is movably connected to the horizontal hanging plate (6) via a hinge (18).

5. The slipform device for the invert arch of an open-cut tunnel according to claim 1, characterized in that: A reinforcing plate (19) is welded and fixed to the side of the bottom of the bottom support plate (14), and the propulsion cylinder (15) is also fixed to the reinforcing plate (19).

6. The slipform device for the invert arch of an open-cut tunnel according to claim 1, characterized in that: A control console (20) is also provided on the horizontal hanging plate (6).

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