Tunnel concrete construction device

Abstract

A tunnel concrete construction device comprises two parallel tracks installed on the tunnel floor, a plastic arched wall, and a hot-cutting unit installed on the tunnel ceiling for hot-melt cutting the outer surface of the plastic arched wall. Both tracks are equipped with a plurality of dragging support units that drive the arched wall to slide along the tracks. The arched wall is also provided with a plurality of windows connecting the inside and outside of the arched wall for inputting concrete. The present invention uses plastic as a template and utilizes the principle of plastic hot-melt deformation, allowing the template to be smoothly bent into any arc, making it suitable for secondary lining of curved tunnels.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a tunnel secondary lining pouring device. Background Art

[0002] Secondary lining refers to the cast-in-place concrete or reinforced concrete lining applied inside the primary support during tunnel construction, which together with the primary support forms a composite lining.

[0003] Currently, secondary lining is mostly constructed using manually constructed casting models or lining trolleys. Tunnel lining trolleys are specialized equipment essential for secondary lining during tunnel construction, used for concrete lining the tunnel's inner wall. They primarily include simple lining trolleys, fully hydraulic automatic lining trolleys, and grid-type lining trolleys. Fully hydraulic lining trolleys can be further categorized as side-top arch, full-circle needle-beam, bottom-form needle-beam, and full-circle travel types.

[0004] The working principle of the lining trolley is to assemble steel molds to form the lower mold for the secondary lining, which is then cast into a casting space between the mold and the tunnel roof to complete the secondary lining. Its shortcomings are: 1. The lining trolley's formwork is made of multiple steel plates. For tunnel sections with curves, it is impossible to splice multiple templates into a smooth transition model; 2. The steel plates are heavy and expensive, making them only suitable for straight tunnels; 3. The steel plate formwork is limited in length due to cost constraints. For long sections, construction needs to be broken down into a large number of sections, which prolongs the construction period; 4. The heavy steel plates place high demands on the support and transportation components of the lining trolley, increasing the complexity and cost of the lining trolley. Summary of the Invention

[0005] The purpose of the present invention is to provide a tunnel concrete construction device, which is suitable for the construction of tunnels with turning radius.

[0006] The objective of the present invention is achieved through such a technical solution, which includes two tracks parallel to each other on the ground inside the tunnel, characterized in that the device also includes a plastic arched wall and a hot cutting unit arranged on the top wall of the tunnel for hot-melt cutting the outer wall of the plastic arched wall, and the two tracks are each provided with a plurality of dragging support units, which can drive the arched wall to slide along the track; the arched wall is also provided with a plurality of windows connecting the inside and outside of the arched wall for inputting concrete.

[0007] Preferably, the device also includes a plastic sealing wall that cooperates with the arched wall, the cross-section of the sealing wall is L-shaped, and a concrete injection molding space is enclosed between the sealing wall, the arched wall and the tunnel top wall; the arched wall is installed on two dragging support units, and the two dragging support units are respectively slidably installed on two tracks.

[0008] Preferably, the two dragging support units equipped with the sealing wall are connected to one end of a pull rod, and the other end of the pull rod is fixed to the inner wall of the arch wall; the two points where the pull rod is fixed to the arch wall are respectively located on both sides of the two tracks, and the sealing wall is located in the forward direction of the arch wall.

[0009] Preferably, the hot cutting unit is installed on the tunnel wall before a curve section appears in the tunnel.

[0010] Preferably, it is characterized in that the hot cutting unit includes three telescopic cylinders and three hot cutting knives, the three telescopic cylinders are fixedly connected to the tunnel wall and are located on the same plane, the telescopic extension lines of the telescopic ends of the three telescopic cylinders intersect at the same point in the tunnel; each telescopic end of the telescopic cylinder is fixedly connected to a hot cutting knife.

[0011] Preferably, the cross section of the track is I-shaped.

[0012] Preferably, the dragging support unit includes a base, the bottom end surface of the base is provided with an opening, both side walls of the base opening are provided with protrusions that cooperate with the I-shaped track guide, and running wheels are rotatably provided between the two side walls of the base with the opening, and the running wheels are located above the track.

[0013] Preferably, the top surface of the base is provided with a plurality of hinged seats, and one end of the electric telescopic rod corresponding to the hinged seat is hinged on the hinged seat and can rotate along the curved wall of the arched wall; the other end of the electric telescopic rod is detachably installed with the arched wall.

[0014] Preferably, a hollow connecting column is fixed at the position of the arched wall window, and the telescopic end of the electric telescopic rod is fixed with a mounting column that can be fixed to the connecting column, and the bottom end surface of the mounting column can close the bottom end surface opening of the connecting column.

[0015] Preferably, two electric telescopic rods are fixedly connected to each base, one is connected to the top of the arched wall, and the other is connected to the side wall of the arched wall.

[0016] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0017] 1. The present invention uses plastic material as the template and utilizes the principle of plastic thermal melting deformation. The template can be smoothly bent into any arc and can be used for secondary lining of turning tunnels;

[0018] 2. The plastic arch wall has low cost, light weight and wide application range;

[0019] 3. The plastic arch wall is not limited by length, which can reduce the number of segmented linings. The arch wall that has been used and is too long can be cut and reused;

[0020] 4. The plastic arched wall is low in weight, which reduces the requirements for the base and moving components and reduces the cost of the secondary lining trolley;

[0021] 5. The present invention utilizes the deformation characteristics of plastic materials and has high versatility for tunnels of different curvatures and sizes;

[0022] 6. During the pouring process, the side wall of the arch wall can be slightly vibrated through the electric telescopic rod, reducing the possibility of pouring gaps.

[0023] Other advantages, objectives, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings of the present invention are described below.

[0025] Figure 1 Explosion diagrams installed for the tunnel;

[0026] Figure 2 Schematic diagram of the structure of this invention;

[0027] Figure 3 Schematic diagram of the three-dimensional structure of the drag support unit;

[0028] Figure 4 To drag the cross-sectional view of the support unit;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the outer wall of the arch wall after circumcision;

[0030] In the figure: 1. Tunnel; 2. Track; 3. Arch wall; 4. Drag support unit; 5. Hot cutting unit; 6. Window; 7. Sealing wall; 8. Pull rod; 9. Telescopic cylinder; 10. Hot cutting knife; 11. Base; 12. Bump; 13. Travel wheel; 14. Articulated seat; 15. Electric telescopic rod; 16. Mounting column. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, 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 of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0033] A tunnel concrete construction device, such as Figure 1 As shown, it includes two tracks 2 arranged parallel to each other on the ground inside the tunnel 1, and the device also includes a plastic arched wall 3 and a hot cutting unit 5 arranged on the top wall of the tunnel 1 for hot-melt cutting the outer wall of the plastic arched wall 3. The two tracks 2 are each provided with a plurality of dragging support units 4, which can drive the arched wall 3 to slide along the track 2; the arched wall 3 is also provided with a plurality of windows 6 connecting the inside and outside of the arched wall 3 for inputting concrete.

[0034] In this embodiment, during construction, the first step is to lay two tracks on the ground of the tunnel to be relined, and install a number of actuator support units on the two tracks; the second step is to select a straight section before the tunnel curves, and install a hot cutting unit on the tunnel roof at the end of the straight section; the third step is to install an arched wall with a cross-sectional size smaller than the tunnel size on a number of dragging support units; the fourth step is to drag the arched wall along the track until it stops at the position of the hot cutting unit, and the hot cutting unit cuts a corrugated pattern on the outer wall of the arched wall, such as Figure 5As shown, the arch wall is now in an arbitrary bendable state; the fifth step controls the forward speed of each dragging support unit on the two tracks to bend the arch wall into the angle of the tunnel turn; the sixth step closes the gap between the arch wall and the tunnel to form a casting space, injects concrete into the casting space through the window, and waits for the concrete to solidify and form. The entire process can be completed automatically by machinery, saving manpower; because the present invention utilizes the thermal deformation characteristics of the plastic arch wall, it can form the same turning angle as the tunnel in any curve, which is suitable for the secondary lining of tunnels with turning angles. The current tempered mold cannot form the turning angle at one time; for the construction of straight sections, due to the low cost of plastic arch walls, longer plastic arch walls can be made, reducing the secondary lining data and speeding up the construction progress. It can also be arbitrarily cut and decomposed into multiple shorter arch walls for subsequent casting; the present invention can also cast concrete for curved sections and straight sections at the same time, creating a new casting mode.

[0035] like Figure 2 As shown, the device also includes a plastic sealing wall 7 that cooperates with the arched wall 3. The cross-section of the sealing wall 7 is L-shaped, and a concrete injection molding space is enclosed between the sealing wall 7, the arched wall 3 and the top wall of the tunnel 1; the arched wall 3 is installed on two dragging support units 4, and the two dragging support units 4 are respectively slidably installed on the two rails 1.

[0036] In this embodiment, in order to facilitate the formation of casting space, a sealing wall is provided in the cube of the arch wall. The sealing wall is also made of plastic material. Under the control of the dragging support unit, it can follow the sealing wall to perform deformation sealing. The sealing wall can be used multiple times, and only one piece can be designed during the secondary lining process of the tunnel.

[0037] like Figure 2 As shown, the two drag support units 4, each equipped with a sealing wall 7, are connected to one end of a tie rod 8, the other end of which is fixed to the inner wall of the arched wall. The two points where the tie rod 8 is fixed to the arched wall 3 are located on either side of the two tracks 2, and the sealing wall 7 is located in the direction of the arched wall. The hot cutting unit 5 is installed on the wall of tunnel 1 before the curve in tunnel 1.

[0038] In this embodiment, the pull rod can be used as a tool to drag the arched wall. Alternatively, two pull rods can provide different pulling forces, cooperating with the braking action of the drag support unit in the arched wall to assist in achieving the bending deformation of the arched wall after hot cutting. The hot cutting unit can be one or more, respectively provided at the location where the arched wall needs to be bent.

[0039] like Figure 2As shown, the hot cutting unit includes three telescopic cylinders 9 and three hot cutting knives 10. The three telescopic cylinders 9 are fixedly connected to the wall of the tunnel 1 and are located on the same plane. The telescopic extension lines of the telescopic ends of the three telescopic cylinders 9 intersect at the same point in the tunnel 1; each telescopic end of the telescopic cylinder 9 is fixedly connected to a hot cutting knife 9.

[0040] In this embodiment, the hot cutting unit includes three hot cutting knives. The blades of the hot cutting knives can be heated. The arc-shaped hot cutting knives can cut a corrugated pattern on the outer surface of the arch wall to facilitate the bending of the arch wall.

[0041] like Figure 3 、 Figure 4 As shown, the cross-section of the track 2 is I-shaped, and the dragging support unit 4 includes a base 11. The bottom end surface of the base 11 is provided with an opening, and both side walls of the opening of the base 11 are provided with protrusions 12 that cooperate with the I-shaped track guide. A running wheel 13 is rotatably provided between the two side walls of the base with the opening, and the running wheel 13 is located above the track 1.

[0042] In this embodiment, the base serves as a basic mounting component of the dragging support unit and can be locked to slide along the direction of the track.

[0043] like Figure 3 As shown, the top surface of the base 11 is provided with a plurality of hinged seats 14, and one end of the electric telescopic rod 15 corresponding to the hinged seat 14 is hinged on the hinged seat 14 and can rotate along the curved wall of the arched wall 3; the other end of the electric telescopic rod 15 is detachably installed together with the arched wall 3.

[0044] In this embodiment, the electric telescopic rod is hinged to the base, allowing the angle of the arched wall to be adjusted as needed. It also allows the arched wall to expand or contract, making it suitable for tunnels of varying curvatures and sizes. During pouring, the electric telescopic rod can also vibrate the arched wall to prevent gaps in the pouring space.

[0045] As shown in FIG3 , the window positions of the arched wall 3 are all fixed with hollow connecting columns, and the telescopic end of the electric telescopic rod 15 is fixed with a mounting column 16 that can be fixed to the connecting column. The bottom end surface of the mounting column 16 can close the bottom end surface opening of the connecting column.

[0046] In this embodiment, the installation column and the connection column cooperate, which not only facilitates the connection of the electric telescopic rod to the arch wall, but also facilitates the injection of concrete from different windows.

[0047] like Figure 3 As shown, two electric telescopic rods 15 are fixedly connected to each base 11 , one of which is connected to the top of the arched wall 3 , and the other is connected to the side wall of the arched wall 3 .

[0048] In this embodiment, two electric telescopic rods respectively support the top wall and one of the side walls of the arch wall. The two dragging support units work together as a group, and four support points can be formed on the same cross-section, making the arch wall more stable during casting, easier to implement when deformation and bending are required, and can also expand evenly when expansion is required.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A tunnel concrete construction device comprising two parallel tracks (2) arranged on the ground in a tunnel (1), characterized in that: The device further comprises a plastic arched wall (3) and a hot-cutting unit (5) arranged on the top wall of the tunnel (1) and capable of hot-melt cutting the outer wall of the plastic arched wall (3); a plurality of dragging support units (4) are arranged on each of the two tracks (2); the dragging support units (4) can drive the arched wall (3) to slide along the tracks (2); and a plurality of windows (6) for connecting the inside and outside of the arched wall (3) and for inputting concrete are also arranged on the arched wall (3); During construction, the first step is to lay two tracks on the ground of the tunnel to be relined, and install several dragging support units on the two tracks; the second step is to select a straight section before the bend in the tunnel, and install a hot-cut unit on the top of the tunnel at the end of the straight section; the third step is to install an arched wall with a cross-sectional size smaller than the tunnel size on several dragging support units; the fourth step is to use the dragging support unit to drive the arched wall along the track until it stops at the position of the hot-cut unit. The hot-cut unit cuts a corrugated pattern on the outer wall of the arched wall, and the arched wall is in a state that can be bent arbitrarily; the fifth step is to control the forward speed of each dragging support unit on the two tracks to bend the arched wall into the angle of the tunnel turn; the sixth step is to close the gap between the arched wall and the tunnel to form a pouring space, inject concrete into the pouring space through the window, and wait for the concrete to solidify and form.

2. A tunnel concrete construction device according to claim 1, characterized in that: The device further comprises a plastic sealing wall (7) cooperating with the arched wall (3); the cross section of the sealing wall (7) is L-shaped; a concrete injection molding space is formed between the sealing wall (7), the arched wall (3) and the top wall of the tunnel (1).

3. A tunnel concrete construction device according to claim 2, characterized in that: The two dragging support units (4) equipped with the sealing wall (7) are both connected to one end of a pull rod (8), and the other end of the pull rod is fixed to the inner wall of the arch wall; the two points where the pull rod (8) is fixed to the arch wall (3) are respectively located on both sides of the two tracks (2), and the sealing wall (7) is located in the forward direction of the arch wall.

4. The tunnel concrete construction device according to claim 1, characterized in that: The hot cutting unit comprises three telescopic cylinders (9) and three hot cutting knives (10). The three telescopic cylinders (9) are all fixedly connected to the wall of the tunnel (1) and are located on the same plane. The telescopic extension lines of the telescopic ends of the three telescopic cylinders (9) intersect at the same point in the tunnel (1); and each telescopic end of the telescopic cylinder (9) is fixedly connected to a hot cutting knife (9).

5. A tunnel concrete construction device according to claim 1 or 2, characterized in that: The cross section of the track (2) is an I-shape.

6. The tunnel concrete construction device according to claim 5, characterized in that: The dragging support unit (4) includes a base (11), the bottom end surface of the base (11) is provided with an opening, and both side walls of the opening of the base (11) are provided with protrusions (12) that cooperate with the I-shaped track guide, and a running wheel (13) is rotatably provided between the two side walls of the base with the opening, and the running wheel (13) is located above the track (1).

7. The tunnel concrete construction device according to claim 6, characterized in that: The top surface of the base (11) is provided with a plurality of hinged seats (14), one end of an electric telescopic rod (15) corresponding to the hinged seat (14) is hinged on the hinged seat (14) and can rotate along the arc wall of the arched wall (3); the other end of the electric telescopic rod (15) is detachably mounted on the arched wall (3).

8. The tunnel concrete construction device according to claim 7, characterized in that: A hollow connecting column is fixedly connected at the window position of the arched wall (3), and the telescopic end of the electric telescopic rod (15) is fixedly connected to a mounting column (16) that can be fixed to the connecting column, and the bottom end surface of the mounting column (16) can close the bottom end surface opening of the connecting column.

9. The tunnel concrete construction device according to claim 8, characterized in that: Two electric telescopic rods (15) are fixedly connected to each base (11), one of which is connected to the top of the arched wall (3) and the other is connected to the side wall of the arched wall (3).

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