Combined formwork trolley for tunnel unilateral cable trench

Abstract

A tunnel unilateral cable trench combined formwork trolley comprises a trolley main frame, the trolley main frame is a gantry type trolley main frame stretching across the upper portion of an outer trench wall of a unilateral cable trench, the trolley main frame comprises a plurality of frames, each frame is composed of two vertical rods and a transverse rod, the two vertical rods are perpendicularly connected and fixed to the bottoms of the two ends of the transverse rod respectively, and the transverse rod is connected with the trolley main frame. The multiple frames are arranged in parallel and are connected through longitudinal rods; the vertical rod on one side of the trolley main frame is located in the cable trench, and the vertical rod on the other side is located outside the cable trench; the two sides of the vertical rod located in the cable trench are respectively provided with an inner mold transverse supporting ejector rod, and the bottom of the vertical rod is provided with an in-trench walking wheel. The inner side of the vertical rod located outside the cable trench is provided with an outer mold transverse supporting ejector rod, and the outer side of the vertical rod is provided with an inclined supporting ejector rod used for being connected with the ground for supporting; the trolley main frame located outside the cable trench is provided with an adjustable walking wheel. The formwork trolley is simple in structure and convenient to operate, can be flexibly adjusted and applied to construction, can improve the construction efficiency of the wall of the cable trench, and is not easy to hinder the use of other equipment during installation and erection.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel cable trench construction, in particular to a combined formwork trolley for a single-sided cable trench in a tunnel. Background Technique

[0002] With the continuous development of highway construction, the mountainous expressways have a high bridge-tunnel ratio, with many and long tunnels, and all kinds of supporting facilities are complete. The tunnel structure is mainly composed of two major categories: main structures and auxiliary structures. Among them, the cable trench is an important part of the auxiliary structures, providing a spatial position for the laying of cables and pipelines used in tunnel operation.

[0003] The formed tunnel usually uses the boundary of the cable trench groove as the lateral limit of the tunnel pavement width. One side of the cable trench groove close to the pavement is the cable trench side wall formed by concrete pouring. The cross-section of the cable trench side wall is generally a rectangular cross-section, which can be formed by pouring with ordinary molds. The on-site pouring of the cable trench is also an important part of the tunnel project. Because of the disadvantages of the traditional assembled formwork technology, such as large manual input, many repeated splices, limited support, and poor linear control, it has been gradually phased out in engineering construction. In order to reduce the labor intensity, some construction units use an automated trolley as an integrated formwork tool for constructing and pouring the cable trench side wall. The cable trench trolley has operations such as the movement, precise positioning, and formwork reinforcement of the fixed formwork, which can save most of the formwork erection time and reduce the labor intensity. However, the tunnel cable trench trolley on the market has a high cost. During the construction process, the cable trench trolley can only reach 12 meters in one construction. In this way, it must wait for the concrete to initially set before demoulding and can then be moved to the next section for use. It is installed across the tunnel and is likely to hinder the use of other construction equipment, which will delay the construction progress. In addition, the external dimensions of the formwork are not adjustable, so it cannot better meet the construction width of the cable trench, and the adaptability is relatively low.

[0004] Through applied research, it is found that the prefabricated tunnel cable trench formwork is gradually applied in more and more tunnel projects because of its advantages such as fast construction speed, low cost, and convenient operation. During the construction application process of the prefabricated tunnel cable trench formwork, it also needs to be supported and positioned. The traditional support frame is troublesome to install and operate. Therefore, in order to improve the construction efficiency and not hinder the use of other construction equipment, it is necessary to design a combined formwork trolley for a single-sided cable trench in a tunnel. Summary of the Invention

[0005] The purpose of the utility model is to provide a combined formwork trolley for a single-sided cable trench in a tunnel. The combined formwork trolley for a single-sided cable trench in a tunnel has a simple structure, is convenient to operate, can be flexibly adjusted for application construction, can improve the construction efficiency of the cable trench wall, and is not likely to hinder the use of other equipment during installation.

[0006] In order to achieve the purpose of the utility model, the technical solution adopted is as follows:

[0007] A combined formwork trolley for a single-sided cable trench in a tunnel, comprising a main trolley frame. The main trolley frame is a gantry-type main trolley frame spanning above the outer wall of the single-sided cable trench. The main trolley frame includes multiple frames composed of two vertical rods and one cross rod. The two vertical rods are respectively vertically connected and fixed to the bottom ends of both ends of the cross rod. The multiple frames are arranged in parallel and connected by longitudinal rods. The longitudinal rods are respectively connected to the two ends of two adjacent cross rods. The number of frames can be arbitrarily set according to the on-site construction requirements. By connecting longitudinal rods between two frames, the length of the trolley can be changed to meet the construction requirements of the tunnel cable trench. One vertical rod on one side of the main trolley frame is located inside the cable trench, and the other vertical rod on the other side of the main trolley frame is located outside the cable trench. Inner formwork cross bracing rods for supporting the inner formwork on both sides of the trench wall inside the cable trench are respectively arranged on both sides of the vertical rod located inside the cable trench, and trench inner walking wheels are installed at the bottom of this side of the vertical rod. An outer formwork cross bracing rod for supporting the outer formwork of the trench wall is arranged on the inner side of the vertical rod located outside the cable trench. The outer formwork of the trench wall and the inner formwork of the adjacent side of the trench wall serve as the formwork for pouring the outer wall of the cable trench, and the inner formwork of the other side of the trench wall serves as the formwork for pouring the inner wall of the cable trench. An inclined bracing rod for connecting and supporting with the ground is arranged on the outer side of this vertical rod. Adjustable walking wheels with adjustable height are installed on the main trolley frame located outside the cable trench.

[0008] Further preferably: between the vertical rod and the cross rod, and between the longitudinal rod and the cross rod, they are respectively detachably connected by connecting plates and connecting bolts. The connecting plate is welded to one of the rods. The connecting plate is designed in the form of a clamping groove. The other rod is placed in the clamping groove, and corresponding bolt mounting holes are provided. Connecting bolts are inserted and installed in the bolt mounting holes, and the corresponding nuts are tightened to fasten the connecting rods.

[0009] Further preferably: a round steel pad for expanding the contact surface is arranged at the contact end of the inner formwork cross bracing rod and the inner formwork of the trench wall. A rubber pad is additionally arranged on the contact surface between the round steel pad and the inner formwork of the trench wall to improve the contact friction. A formwork cross bracing rod is installed at the template connection position between the inner formworks of the trench walls on both sides inside the cable trench. A round steel pad and a rubber pad for expanding the contact surface are also arranged at the contact end of the formwork cross bracing rod and the inner formwork of the trench wall.

[0010] Further preferably: the inner formwork cross bracing rod includes a lead screw sleeve, a mounting seat and a cross bracing lead screw. One end of the cross bracing lead screw is threadedly connected to the lead screw sleeve. The length of the bracing rod is adjusted by rotating the lead screw. One end of the lead screw sleeve is hinged to the vertical rod through the mounting seat. A bottom support for restricting the lower swing position of the cross bracing lead screw is arranged on the mounting seat, so that the cross bracing lead screw can only swing down to the horizontal state at the lowest.

[0011] Further preferably: an inner formwork cross bracing rod buckle for winding and unwinding the cross bracing lead screw is arranged on the vertical rod. In the non-working state, the inner formwork cross bracing rod can be buckled to the main frame by using the inner formwork cross bracing rod buckle to achieve more convenient installation and storage.

[0012] Further preferably, the outer formwork cross bracing rod includes a lead screw sleeve, a lead screw, and an outer formwork cross bracing rod mounting seat. The lead screw sleeve is hingedly mounted on the vertical rod through the outer formwork cross bracing rod mounting seat. One end of the lead screw is threadedly connected to the lead screw sleeve, and the length of the rod is adjusted by rotating the lead screw. A bottom support for restricting the lower swing position of the lead screw is provided on the outer formwork cross bracing rod mounting seat, so that the lead screw can only swing down to the horizontal state at the lowest; a longitudinal round rod and a vertical round rod are provided on the back of the outer formwork of the trench wall, the vertical round rod is located on the outside, and a semi-circular top support for abutting against the vertical round rod is provided at the end of the lead screw.

[0013] Further preferably, an outer formwork cross bracing rod buckle for retracting and extending the lead screw is provided on the vertical rod. In the non-working state, the outer formwork cross bracing rod can be fastened to the main frame by using the outer formwork cross bracing rod buckle to achieve more convenient installation and storage.

[0014] Further preferably, the inclined bracing rod includes a lead screw sleeve, an inclined bracing lead screw mounting seat, and an inclined bracing lead screw. The lead screw sleeve is hinged on the vertical rod through the inclined bracing lead screw mounting seat. One end of the inclined bracing lead screw is threadedly connected to the lead screw sleeve, and the length of the rod is adjusted by rotating the lead screw. A support seat for supporting on the ground is provided at the other end of the inclined bracing lead screw.

[0015] Further preferably, an inclined bracing rod buckle for retracting and extending the inclined bracing rod is provided on the vertical rod. In the non-working state, the inclined bracing rod can be fastened to the main frame by using the inclined bracing rod buckle to achieve more convenient installation and storage.

[0016] Further preferably, the adjustable traveling wheel includes a lead screw lift. The lead screw lift is connected to the vertical rod outside the cable trench through a longitudinal rod. Both ends of the longitudinal rod are detachably connected to two adjacent vertical rods respectively through a connecting plate and a connecting bolt. The lead screw lift is installed on the longitudinal rod and the lifting lead screw of the lead screw lift is vertically arranged. A traveling wheel is installed at the bottom end of the lifting lead screw. The length of the lead screw is adjusted by the lead screw lifting principle to ensure that the traveling wheel is in close contact with the ground and ensure that the main frame of the trolley is horizontally placed to adapt to different complex working conditions; the lead screw lift is a manual and electric dual-purpose lead screw lift or a manual lead screw lift, and the lead screw lift is purchased and installed for use.

[0017] The combined formwork trolley for the single-sided cable trench of this tunnel has a simple structure. It adopts a detachable combined structure to support the formwork of the single-sided cable trench of the tunnel, can be flexibly adjusted and applied in construction, uses a rod with adjustable length, is convenient to operate, can reduce the working intensity of construction workers, improve the construction efficiency of the cable trench wall, and the installation and erection do not easily hinder the use of other equipment, and also avoid the problem that the traditional fixed formwork for single-sided cable trench construction needs to set tie rods and damage the secondary lining structure. Description of the Drawings

[0018] Figure 1Schematic diagram of the application and installation structure of the combined formwork trolley for the unilateral cable trench in this tunnel;

[0019] Figure 2 is Figure 1 end face structure schematic diagram;

[0020] Figure 3 Schematic diagram of the connection relationship between the combined formwork trolley for the unilateral cable trench in this tunnel and the formwork;

[0021] Figure 4 is Figure 3 partial enlarged schematic diagram at position A in

[0022] Figure 5 Schematic diagram of the structure of the combined formwork trolley for the unilateral cable trench in this tunnel;

[0023] Figure 6 is Figure 5 partial enlarged schematic diagram at position B in

[0024] Figure 7 Schematic diagram of the structure of the adjustable walking wheel Figure 1 ;

[0025] Figure 8 Schematic diagram of the structure of the adjustable walking wheel Figure 2 ;

[0026] The names corresponding to the numbers in the figure are:

[0027] 1. Adjustable walking wheel; 2. Outer formwork cross brace rod; 3. Outer groove wall of the cable trench; 4. In-groove walking wheel; 5. Inner groove wall of the cable trench; 6. Inner formwork cross brace rod; 7. Main frame of the trolley; 8. Inner formwork of the groove wall; 9. Outer formwork of the groove wall; 10. Diagonal brace rod; 11. Connecting plate; 12. Longitudinal rod; 13. Cross bar; 14. Vertical rod; 15. Diagonal brace rod buckle; 16. Inner formwork cross brace rod buckle; 17. Connecting bolt; 18. Longitudinal round rod; 19. Vertical round rod; 20. Formwork cross brace rod; 21. Mounting seat; 22. Bottom support; 23. Cross brace screw rod; 24. Diagonal brace screw rod mounting seat; 25. Diagonal brace screw rod; 26. Support seat; 27. Outer formwork cross brace rod mounting seat; 28. Semi-circular top support; 29. Round steel pad; 30. Rubber pad; 31. Walking wheel; 32. Lifting screw rod; 33. Manual and electric dual-purpose screw jack; 34. Manual screw jack. Specific implementation method

[0028] In order to make the technical solutions and advantages of this application clearer, the following combines examples to clearly and completely describe this technical solution. Example

[0029] As Figure 1 and Figure 3As shown in the figure, a combined formwork trolley for a single-sided cable trench in a tunnel includes a main trolley frame 7. The main trolley frame 7 is a gantry-type main trolley frame spanning above the outer wall 3 of the single-sided cable trench. The main trolley frame 7 includes multiple frames composed of two vertical rods 14 and one cross rod 13. The two vertical rods 14 are respectively vertically connected and fixed to the bottom ends of both ends of the cross rod 13. The multiple frames are arranged in parallel and connected by longitudinal rods 12. The longitudinal rods 12 are respectively connected to both ends of two adjacent cross rods 13. The number of frames can be arbitrarily set according to the on-site construction requirements. By connecting the longitudinal rods 12 between two frames, the length of the trolley can be changed to meet the construction requirements of the tunnel cable trench. One vertical rod 14 on one side of the main trolley frame 7 is located inside the cable trench, and the other vertical rod 14 on the other side of the main trolley frame 7 is located outside the cable trench. Inner formwork cross bracing rods 6 for supporting the inner formwork 8 of both sides of the trench wall inside the cable trench are respectively arranged on both sides of the vertical rod 14 located inside the cable trench, and inner trench traveling wheels 4 are installed at the bottom of this side of the vertical rod 14. An outer formwork cross bracing rod 2 for supporting the outer formwork 9 of the trench wall is arranged inside the vertical rod 14 located outside the cable trench. The outer formwork 9 of the trench wall and the inner formwork 8 of the adjacent side of the trench wall are used as the formwork for pouring the outer wall 3 of the cable trench, and the inner formwork 8 of the other side of the trench wall is used as the formwork for pouring the inner wall 5 of the cable trench. An inclined bracing rod 10 for connecting and supporting with the ground is arranged outside this vertical rod 14. An adjustable traveling wheel 1 with adjustable height is installed on the main trolley frame 7 located outside the cable trench.

[0030] As Figure 4 shown, between the vertical rod 14 and the cross rod 13, and between the longitudinal rod 12 and the cross rod 13, they are respectively detachably connected by a connecting plate 11 and a connecting bolt 17. The connecting plate 11 is welded to one of the members. The connecting plate 11 is designed in the form of a card slot. The other member is placed into the card slot, and corresponding bolt mounting holes are provided. The connecting bolt 17 is inserted through the bolt mounting holes, and by tightening the corresponding nuts, the connecting members can be fastened.

[0031] As Figure 6 shown, a round steel pad 29 for expanding the contact surface is provided at the contact end of the inner formwork cross bracing rod 6 and the inner formwork 8 of the trench wall. A rubber pad 30 is additionally provided on the contact surface between the round steel pad 29 and the inner formwork 8 of the trench wall to increase the contact friction. A formwork cross bracing rod 20 is installed at the template connection position between the inner formwork 8 of both sides of the trench wall inside the cable trench. A round steel pad 29 and a rubber pad 30 for expanding the contact surface are also provided at the contact end of the formwork cross bracing rod 20 and the inner formwork 8 of the trench wall.

[0032] The inner formwork cross bracing rod 6 includes a lead screw sleeve, a mounting seat 21, and a cross bracing lead screw 23. One end of the cross bracing lead screw 23 is threadedly connected to the lead screw sleeve. The length of the bracing rod is adjusted by rotating the lead screw. One end of the lead screw sleeve is hinged to the vertical rod 14 through the mounting seat 21. A bottom support 22 for restricting the downward swing position of the cross bracing lead screw 23 is provided on the mounting seat 21, so that the cross bracing lead screw 23 can only swing downward to the horizontal state at the lowest.

[0033] As Figure 2 and Figure 4 shown, an inner mold cross brace ejector rod buckle 16 for retracting and extending a cross brace screw rod 23 is provided on the vertical rod 14. In a non-working state, the inner mold cross brace ejector rod 6 can be buckled to the main frame by using the inner mold cross brace ejector rod buckle 16 to achieve more convenient installation and storage.

[0034] As Figure 6 shown, the outer mold cross brace ejector rod 2 includes a screw rod sleeve, a screw rod, and an outer mold cross brace ejector rod mounting seat 27. The screw rod sleeve is hingedly mounted on the vertical rod 14 through the outer mold cross brace ejector rod mounting seat 27. One end of the screw rod is threadedly connected to the screw rod sleeve. The length of the ejector rod is adjusted by rotating the screw rod. A bottom support for restricting the lower swing position of the screw rod is provided on the outer mold cross brace ejector rod mounting seat 27, so that the screw rod can only swing down to a horizontal state at the lowest; a longitudinal round rod 18 and a vertical round rod 19 are provided on the back of the groove outer formwork 9. The vertical round rod 19 is located on the outside, and a semi-circular top support 28 for abutting against the vertical round rod 19 is provided at the end of the screw rod.

[0035] An outer mold cross brace ejector rod buckle for retracting and extending the screw rod is provided on the vertical rod 14. In a non-working state, the outer mold cross brace ejector rod 2 can be buckled to the main frame by using the outer mold cross brace ejector rod buckle to achieve more convenient installation and storage.

[0036] As Figure 6 shown, the diagonal brace ejector rod 10 includes a screw rod sleeve, a diagonal brace screw rod mounting seat 24, and a diagonal brace screw rod 25. The screw rod sleeve is hinged on the vertical rod 14 through the diagonal brace screw rod mounting seat 24. One end of the diagonal brace screw rod 25 is threadedly connected to the screw rod sleeve. The length of the ejector rod is adjusted by rotating the screw rod. A support seat 26 for supporting on the ground is provided at the other end of the diagonal brace screw rod 25.

[0037] A diagonal brace ejector rod buckle 15 for retracting and extending the diagonal brace ejector rod 10 is provided on the vertical rod 14. In a non-working state, the diagonal brace ejector rod 10 can be buckled to the main frame by using the diagonal brace ejector rod buckle 15 to achieve more convenient installation and storage.

[0038] As Figures 5 to 8As shown in the figure, the adjustable walking wheel 1 includes a screw jack. The screw jack is connected to the vertical rod 14 outside the cable trench through the longitudinal rod 12. Both ends of the longitudinal rod 12 are detachably connected to two adjacent vertical rods 14 through the connecting plate 11 and the connecting bolt 17. The screw jack is installed on the longitudinal rod 12 and the lifting screw rod 32 of the screw jack is vertically arranged. A walking wheel 31 is installed at the bottom end of the lifting screw rod 32. The length of the screw rod is adjusted by the screw lifting principle to ensure that the walking wheel is in close contact with the ground and ensure that the main frame of the trolley is horizontally placed to adapt to different complex working conditions. The screw jack is a manual and electric dual-purpose screw jack 33 or a manual screw jack 34, and the screw jack is purchased and installed for use. The main frame of the trolley is assembled on the leveled ground. After moving the main frame of the trolley to the cable trench position where construction is required, the walking wheels in the trench are placed in the cable trench body, the height of the adjustable walking wheel is adjusted, placed in the water channel, and ensure that the main frame of the trolley is horizontally placed.

[0039] The above description is not a limitation to this application, nor is this application limited to the above examples. Those of ordinary skill in the art in this technical field, within the scope of the essence of this application, any changes, modifications, additions or substitutions should fall within the protection scope of this application.

Claims

1. A combined formwork trolley for a single-sided cable trench in a tunnel, comprising a main trolley frame (7), characterized in that: The main frame (7) of the trolley is a gantry-type main frame of the trolley that spans above the outer trench wall (3) of the unilateral cable trench. The main frame (7) of the trolley includes multiple frames composed of two vertical rods (14) and one cross rod (13). The two vertical rods (14) are respectively vertically connected and fixed to the bottom ends of the cross rod (13). The multiple frames are arranged in parallel and connected by longitudinal rods (12). The longitudinal rods (12) are respectively connected to the two ends of two adjacent cross rods (13). One vertical rod (14) on one side of the main frame (7) of the trolley is located inside the cable trench, and the vertical rod (14) on the other side of the main frame (7) of the trolley is located outside the cable trench; inner formwork cross bracing rods (6) for supporting the inner formwork of the trench walls on both sides inside the cable trench are respectively arranged on both sides of the vertical rod (14) located inside the cable trench, and inner trench traveling wheels (4) are installed at the bottom of the vertical rod (14) on this side; outer formwork cross bracing rods (2) for supporting the outer formwork (9) of the trench wall are arranged on the inner side of the vertical rod (14) located outside the cable trench, and diagonal bracing rods (10) for connecting and supporting with the ground are arranged on the outer side of the vertical rod (14); adjustable traveling wheels (1) with adjustable height are installed on the main frame (7) of the trolley located outside the cable trench.

2. The combined formwork trolley for the unilateral cable trench in the tunnel according to claim 1, characterized in that: Between the vertical rod (14) and the cross rod (13), and between the longitudinal rod (12) and the cross rod (13), they are respectively detachably connected by connecting plates (11) and connecting bolts (17).

3. The combined formwork trolley for single-sided cable trench in tunnel according to claim 1, characterized in that: A round steel pad (29) for expanding the contact surface is arranged at the contact end of the inner formwork cross bracing rod (6) and the inner formwork of the trench wall (8), and a rubber pad (30) is additionally arranged on the contact surface between the round steel pad (29) and the inner formwork of the trench wall (8).

4. The combined formwork trolley for single-sided cable trench in tunnel according to claim 1 or 3, characterized in that: The inner formwork cross bracing rod (6) includes a lead screw sleeve, a mounting seat (21), and a cross bracing lead screw (23). One end of the cross bracing lead screw (23) is threadedly connected in the lead screw sleeve. One end of the lead screw sleeve is hinged to the vertical rod (14) through the mounting seat (21), and a bottom support (22) for restricting the downward swing position of the cross bracing lead screw (23) is arranged on the mounting seat (21).

5. The combined formwork trolley for the single-sided cable trench in the tunnel according to claim 1 or 3, characterized in that: An inner formwork cross bracing rod buckle (16) for retracting and extending the cross bracing lead screw (23) is arranged on the vertical rod (14).

6. The combined formwork trolley for single-sided cable trench in tunnel according to claim 1, wherein: The outer formwork cross bracing rod (2) includes a lead screw sleeve, a lead screw, and an outer formwork cross bracing rod mounting seat (27). The lead screw sleeve is hinged and installed on the vertical rod (14) through the outer formwork cross bracing rod mounting seat (27). One end of the lead screw is threadedly connected in the lead screw sleeve. A bottom support for restricting the downward swing position of the lead screw is arranged on the outer formwork cross bracing rod mounting seat (27); longitudinal round rods (18) and vertical round rods (19) are arranged on the back of the outer formwork (9) of the trench wall. The vertical round rod (19) is located on the outer side, and a semi-circular top support (28) for abutting against the vertical round rod (19) is arranged at the end of the lead screw.

7. The combined formwork trolley for the unilateral cable trench in the tunnel according to claim 6, characterized in that: An outer formwork cross bracing rod buckle for retracting and extending the lead screw is arranged on the vertical rod (14).

8. The combined formwork trolley for single-sided cable trench in tunnel according to claim 1, characterized in that: The diagonal bracing rod (10) includes a lead screw sleeve, a diagonal bracing lead screw mounting seat (24), and a diagonal bracing lead screw (25). The lead screw sleeve is hinged to the vertical rod (14) through the diagonal bracing lead screw mounting seat (24). One end of the diagonal bracing lead screw (25) is threadedly connected in the lead screw sleeve, and a support seat (26) for supporting on the ground is arranged at the other end of the diagonal bracing lead screw (25).

9. The combined formwork trolley for single-sided cable trench in tunnel according to claim 8, wherein: A strut top rod buckle (15) for retracting and extending the diagonal strut top rod (10) is provided on the vertical rod (14).

10. The combined formwork trolley for the unilateral cable trench in the tunnel according to claim 1, characterized in that: The adjustable walking wheel (1) includes a screw jack. The screw jack is connected to the vertical rod (14) outside the cable trench through a longitudinal rod (12). Both ends of the longitudinal rod (12) are detachably connected to two adjacent vertical rods (14) respectively through a connecting plate (11) and a connecting bolt (17). The screw jack is installed on the longitudinal rod (12), and the lifting screw rod (32) of the screw jack is vertically arranged. A walking wheel (31) is installed at the bottom end of the lifting screw rod (32); the screw jack is a manual and electric dual-purpose screw jack (33) or a manual screw jack (34).

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