Self-propelled hydraulic gantry-free variable cross-section trolley

Abstract

The utility model discloses a self-propelled hydraulic gantry-free variable cross-section trolley, and relates to the technical field of tunnel engineering. Comprising a vault formwork, side formworks are arranged on the two sides of the vault formwork, the side formworks are rotationally connected with the vault formwork, and hydraulic walking systems are arranged at the bottoms of the side formworks; a plurality of pouring platforms are arranged in the side formworks and the vault formwork, the pouring platforms on the side formworks are rotationally connected with the side formworks, the pouring platforms on the vault formwork are rotationally connected with the vault formwork, first limiting devices are arranged on the pouring platforms, and the first limiting devices are used for adjusting the rotating angles of the pouring platforms. Only one trolley is arranged, the secondary lining construction of the whole section tunnel can be completed at a time, and the construction efficiency and the secondary lining quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel engineering, in particular to a self-propelled hydraulic door-less variable-section trolley. Background Art

[0002] The double-side wall pilot tunnel excavation method is generally used in dark-cut tunnel projects with poor surrounding rock, large cross-section, shallow burial depth, complex surrounding environment and high requirements for settlement control. It is often encountered that the tunnel passes under existing buildings (structures). The usual measures are mainly to strengthen advance support, enhance the initial support strength of the excavated tunnel, accelerate the formation of initial support rings, etc., all of which are carried out around the tunnel excavation construction.

[0003] During the secondary lining construction of the double-side wall pilot pit method, a plurality of simple trolleys are generally used for construction in each pit. For example, the patent with publication number CN108331590B discloses a loading-type tunnel double-side wall pilot pit trolley and an operation method. However, this method is provided with two trolleys to ensure the construction efficiency, which has the problems of long preparation time, high cost investment and great interference with on-site construction. Utility Model Content

[0004] The main purpose of the utility model is to provide a self-propelled hydraulic gantry-free variable-section trolley to solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the utility model provides a self-propelled hydraulic gantry-free variable-section trolley, comprising an arch template, side templates are arranged on both sides of the arch template, the side templates are rotatably connected to the arch template, and a hydraulic walking system is arranged at the bottom of the side template;

[0006] A plurality of casting platforms are arranged inside the side formwork and the arch formwork. The casting platform on the side formwork is rotatably connected to the side formwork, and the casting platform on the arch formwork is rotatably connected to the arch formwork. A first limiting device is arranged on the casting platform, and the first limiting device is used to adjust the rotation angle of the casting platform.

[0007] A first supporting device is arranged between the arch formwork and the vertical supporting beams of the double side walls, and the first supporting device includes a first base plate and a plurality of first supporting blocks, the first base plate is arranged at the ends of the vertical supporting beams of the double side walls, the first supporting blocks are evenly distributed at the bottom of the arch formwork and opposite to the first base plate, a roller rotatably connected to the first supporting block is arranged at the bottom of the first supporting block, a connecting plate is arranged on the side of the first supporting block, and the connecting plate is used to fix the first base plate and the first supporting block.

[0008] Furthermore, rotating frames are provided at both ends inside the arch template, one end of the rotating frame is rotatably connected to the arch template, and the other end of the rotating frame is rotatably connected to the working platform.

[0009] Furthermore, one end of the working platform is rotatably connected to a ladder.

[0010] Furthermore, a rotation limit device is provided at the connection between the arch formwork and the side formwork, and the rotation limit device includes an upper limit seat and a lower limit seat, the upper limit seat is located on the inner side of the bottom of the arch formwork and is fixedly connected to the arch formwork, the lower limit seat is located on the inner side of the top of the side formwork and is fixedly connected to the side formwork, and the upper limit seat is rotatably connected to the lower limit seat.

[0011] Furthermore, a second supporting device is arranged between the side formwork and the double side wall horizontal support beams, the second supporting device includes a second base plate and a plurality of second supporting blocks, the second base plate is L-shaped, one surface of the second base plate abuts against the end of the double side wall horizontal support beams, and the other surface abuts against the top of the side wall horizontal support beams, one end of the second support block is fixedly connected to the inner wall of the side formwork, and the other end is located above the base plate, the connecting plate is located at the end of the second support block away from the side formwork, the connecting plate is a triangular support, the triangular support is slidably connected to the second support block, and the triangular support is used to fix the second base plate and the second support block.

[0012] Furthermore, casting windows corresponding to the casting platform are provided on the side formwork and the arch formwork, the vertical distance between the two casting windows is less than 3m, and the distance between the lowest casting window and the tunnel invert filling surface is less than 3m.

[0013] Furthermore, a plurality of support frames are evenly distributed on the side formwork, the hydraulic walking system is arranged at the bottom of the support frame, the hydraulic walking system includes a base, a lifting hydraulic cylinder is arranged on the base, a sliding seat is arranged on the piston rod of the lifting hydraulic cylinder, a moving hydraulic cylinder is arranged on the sliding seat, a moving seat is arranged on the piston rod of the moving hydraulic cylinder, the moving seat is slidably connected with the sliding seat, a groove is arranged on the moving seat, a horizontal hydraulic cylinder is arranged in the groove, the extension and contraction direction of the horizontal hydraulic cylinder is perpendicular to the extension and contraction direction of the moving hydraulic cylinder, a top block is arranged on the piston rod of the horizontal hydraulic cylinder, the top block is slidably connected with the moving seat, a lower hinged support is arranged on the top of the top block, an upper hinged support is arranged at the bottom of the support frame, the upper hinged support is rotatably connected with the lower hinged support, and the support frame is provided with more than four.

[0014] Furthermore, a vertical supporting screw is provided at the bottom of the side formwork.

[0015] Furthermore, a horizontal supporting screw is arranged between the side formwork and the vertical supporting beams of the double side walls.

[0016] The utility model has the following beneficial effects:

[0017] The utility model is only provided with one trolley which can complete the secondary lining construction of the entire cross-section tunnel at one time, thus avoiding the mutual influence of multiple trolleys during construction, reducing the early preparation time, and improving the construction efficiency and the quality of the secondary lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the utility model of a self-propelled hydraulic gantry-less variable-section trolley;

[0019] Figure 2 It is a schematic diagram of the hydraulic travel system of the utility model self-propelled hydraulic gantry-less variable-section trolley;

[0020] Figure 3 It is a schematic diagram of the working platform of the self-propelled hydraulic gantry-free variable-section trolley of the utility model;

[0021] Figure 4 It is a schematic diagram of the first supporting device of the self-propelled hydraulic type doorless variable cross-section trolley of the utility model;

[0022] Figure 5 It is a schematic diagram of the second supporting device of the self-propelled hydraulic gantry-less variable-section trolley of the utility model.

[0023] In the figure: 1-arch formwork; 11-rotation limit device; 2-side formwork; 21-support frame; 22-vertical support screw; 23-horizontal support screw; 24-casting platform; 3-hydraulic walking system; 31-base; 32-lifting hydraulic cylinder; 33-sliding seat; 34-moving hydraulic cylinder; 35-moving seat; 36-horizontal hydraulic cylinder; 37-top block; 4a-first bottom plate; 5a-first support block; 4b-second bottom plate; 5b-second support block; 51-roller; 6-connecting plate; 61-triangular support; 7-rotating frame; 8-working platform; 9-vertical support beams of double side walls; 10-horizontal support beams of double side walls. DETAILED DESCRIPTION

[0024] In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the utility model are described in detail with reference to the accompanying drawings for the preferred embodiments of the utility model and their features and functions.

[0025] As attached Figure 1-3 As shown, the utility model provides a self-propelled hydraulic type door frame-free variable cross-section trolley, comprising an arch template 1, side templates 2 are arranged on both sides of the arch template 1, the side templates 2 and the arch template 1 are rotatably connected, a plurality of support frames 21 are evenly distributed at the bottom of the side template 2, and a hydraulic walking system 3 is arranged at the bottom of the support frame 21;

[0026] The hydraulic walking system 3 includes a base 31, on which a lifting hydraulic cylinder 32 is arranged, and a sliding seat 33 is arranged on the piston rod of the lifting hydraulic cylinder 32, and a moving hydraulic cylinder 34 is arranged on the sliding seat 33. The telescopic direction of the moving hydraulic cylinder 34 is consistent with the walking direction, and a moving seat 35 is arranged on the piston rod of the moving hydraulic cylinder 34. The moving seat 35 is slidably connected with the sliding seat 33, and a groove is arranged on the moving seat 35. A horizontal hydraulic cylinder 36 is arranged in the groove, and the telescopic direction of the horizontal hydraulic cylinder 36 is perpendicular to the telescopic direction of the moving hydraulic cylinder 34. A top block 37 is arranged on the piston rod of the horizontal hydraulic cylinder 36, and the top block 37 is slidably connected with the moving seat 35. A lower articulated support is arranged on the top of the top block 37, and an upper articulated support is arranged at the bottom of the support frame 21. The upper articulated support is rotatably connected with the lower articulated support. The support frame 21 is provided with more than four, and multiple hydraulic walking systems 3 are divided into two groups to complete the walking of the trolley.

[0027] A plurality of pouring platforms 24 and pouring windows corresponding to the pouring platforms 24 are arranged inside the side formwork 2 and the arch formwork 1, and the vertical distance between two pouring windows on the same section is less than 3m, and the distance between the lowest pouring window and the tunnel invert filling surface is less than 3m. The pouring platform 24 on the side formwork 2 is rotatably connected to the side formwork 2, and the pouring platform 24 on the arch formwork 1 is rotatably connected to the arch formwork 1. A first limiting device is arranged on the pouring platform 24, and the first limiting device is used to adjust the rotation angle of the pouring platform 24. The first limiting device can specifically be a winch and a steel strand, the winch is arranged on the formwork, one end of the steel strand is connected to the end of the pouring platform 24 away from the rotating electricity, and the other end of the steel strand is wound on the drum of the winch, so as to change the extension length of the steel strand by controlling the rotation of the winch, thereby controlling the rotation of the pouring platform 24.

[0028] In actual use, after the trolley is installed as a whole, the top block 37 is first moved by the horizontal hydraulic cylinder 36, so that the top block 37 moves toward the inner walls of the tunnel on both sides and drives the support frame 21 to move, and the side template 2 on the support frame 21 moves toward the inner wall of the tunnel to complete the expansion of the side template 2, and then the side template 2 and the arch template 1 are connected to each other through the flange and fixed by bolts, and then the horizontal hydraulic cylinder 36 is adjusted to make the center line of the trolley coincide with the center line of the tunnel lining. During adjustment, the hydraulic travel system 3 is divided into two groups. When the horizontal hydraulic cylinder 36 of the first group of hydraulic travel system 3 is extended, the lifting hydraulic cylinder 32 of the second group of hydraulic travel system 3 is in a retracted state, and the base 31 of the second group does not contact the filling surface of the tunnel invert , so as not to hinder the extension of the horizontal hydraulic cylinder 36 of the first group. After the extension of the horizontal hydraulic cylinder 36 of the first group is completed, the lifting hydraulic cylinder 32 of the second group is extended to make the base 31 contact with the filling surface of the tunnel invert arch, and the second group begins to support. The lifting hydraulic cylinder 32 and the horizontal hydraulic cylinder 36 of the first group begin to shrink, and the horizontal hydraulic cylinder 36 of the second group is extended. The trolley continues to move in the horizontal direction. When the extension of the horizontal hydraulic cylinder 36 of the second group is completed, the lifting hydraulic cylinder 32 of the first group is extended and supported, and the lifting hydraulic cylinder 32 and the horizontal hydraulic cylinder 36 of the second group are contracted, and the initial steps are repeated until the trolley is adjusted into place, and then the lifting hydraulic cylinder 32 is adjusted to make the height of the arch template 1 the same as the height of the tunnel lining.

[0029] Then control the winch to rotate and gradually release the steel strand from the winch. As the length of the steel strand increases, the pouring platform 24 gradually rotates downward. When the pouring platform 24 turns to a horizontal state, stop the winch and temporarily fix the pouring platform 24. At this time, the staff can board the pouring platform 24 and open the pouring window to pour the secondary lining of the tunnel.

[0030] After the secondary lining of the tunnel is completed, the winch is first controlled to flip to retract the steel strand, and the casting platform 24 is rotated upward until the casting platform 24 is in contact with the corresponding template, and then the flanges fixing the side template 2 and the arch template 1 are removed, the side template 2 and the arch template 1 are released, and then the horizontal hydraulic cylinder 36 is adjusted to make the two side templates 2 shrink inward to complete the demoulding of the side template 2, and finally the lifting hydraulic cylinder 32 is adjusted to lower the height of the arch template 1 and make the roller 51 on the first support block 5a contact with the bottom plate 4 to complete the demoulding of the entire trolley.

[0031] After the trolley is demoulded, it can be moved to the next position. When the trolley is moving, the hydraulic walking system 3 is also divided into two groups. First, the lifting hydraulic cylinder 32 of the second group of hydraulic walking system 3 contracts, and the moving hydraulic cylinder 34 of the first group of hydraulic walking system 3 extends to move the trolley along the tunnel direction. After the first group of moving hydraulic cylinders 34 completes the extension, the lifting hydraulic cylinder 32 of the second group extends to make the base 31 contact with the filling surface of the tunnel invert arch, and the second group begins to support. The lifting hydraulic cylinder 32 and the moving hydraulic cylinder 34 of the first group begin to contract, and the moving hydraulic cylinder 34 of the second group extends, and the trolley continues to move along the tunnel direction. When the second group of moving hydraulic cylinders 34 finishes extending, the lifting hydraulic cylinder 32 of the first group extends and starts to support, and the lifting hydraulic cylinder 32 and the moving hydraulic cylinder 34 of the second group contract, and the steps of trolley walking are repeated until the trolley moves into place, and then the trolley is unfolded to prepare for the pouring of the secondary lining of the next section of the tunnel.

[0032] In another embodiment, a first supporting device is arranged between the arch formwork 1 and the double-side wall vertical support beams 9, and the first supporting device includes a first base plate 4a and a plurality of first support blocks 5a. The first base plate 4a is an inverted U-shape and is arranged at the ends of the double-side wall vertical support beams 9 to cover the ends thereof. The first support blocks 5a are evenly distributed at the bottom of the arch formwork 1 and are opposite to the first base plate 4a. A roller 51 rotatably connected to the first support block 5a is arranged at the bottom of the first support block 5a, and a connecting plate 6 is arranged on the side of the first support block 5a. The top of the connecting plate 6 is rotatably connected to the first support block 5a, and the connecting plate 6 is used to fix the first base plate 4a and the first support block 5a.

[0033] When the trolley moves to a special section where the surrounding rock strength of the tunnel is low, the staff can install the first base plate 4a at the end of the double-side wall vertical support beam 9, and install the first support block 5a on the arch formwork 1. At this time, the roller 51 on the first support block 5a does not contact the first base plate 4a, and the first base plate 4a and the first support block 5a are fixed together by the connecting plate 6 on the first support block 5a. Specifically, a plurality of oblong holes are provided on the connecting plate 6, and a plurality of bolt holes are provided on the first base plate 4a. The two are fixed by bolts so that the arch formwork 1 and the double-side wall vertical support beam 9 form a whole. The double-side wall vertical support beam 9 provides a supporting force to the arch formwork 1, thereby improving the stability of the arch formwork 1. After the pouring is completed, it is necessary to first release the fixing of the connecting plate 6 and the first base plate 4a, and rotate the connecting plate 6 upward to prevent the connecting plate 6 from hindering the subsequent movement of the trolley. When the height of the arch formwork 1 is lowered, the roller 51 on the first support block 5a can be abutted against the first bottom plate 4a. At this time, the roller 51 on the first support block 5a can roll on the first bottom plate 4a, thereby providing a supporting force to the entire trolley when the trolley moves, reducing the force on the hydraulic travel system 3 and increasing the service life of the hydraulic travel system 3.

[0034] In another embodiment, a second supporting device is provided between the side formwork 2 and the double-side wall horizontal supporting beam 10, and the second supporting device includes a second bottom plate 4b and a plurality of second supporting blocks 5b.

[0035] The second bottom plate 4b is L-shaped, one surface of the second bottom plate 4b is in contact with the end of the double side wall horizontal support beam 10, and the other surface is in contact with the top of the side wall horizontal support beam. One end of the second support block 5b is fixedly connected to the inner wall of the side formwork 2, and the other end is located above the second bottom plate 4b. A triangular support 61 is provided at the end of the second support block 5b away from the side formwork 2. The triangular support 61 is slidably connected to the second support block 5b. The triangular support 61 can slide in the vertical direction to adapt to the different spacings between the second support block 5b and the second bottom plate 4b. The triangular support 61 is used to fix the second bottom plate 4b and the second support block 5b. Therefore, when passing through a special section, the side formwork 2 can be connected to the double side wall horizontal support beam 10 as a whole, and the double side wall horizontal support beam 10 can provide a supporting force to the side formwork 2, thereby improving the stability of the side formwork 2.

[0036] In another embodiment, a rotating frame 7 is provided between the two supporting devices of the arch formwork 1, one end of the rotating frame 7 is rotatably connected to the supporting block 5, and the other end is rotatably connected to the working platform 8. Before the trolley is in place, the rotating frame 7 and the working platform 8 are parallel to the horizontal plane. When the trolley is in place, the staff can make the rotating frame 7 vertical and rotate the working platform 8 to make it horizontal again. The staff can stand on the working platform 8 to work, which is convenient for the subsequent disassembly of the connecting plate 6 and the installation of the end formwork, and convenient for observing the capping concrete through the observation window on the end formwork.

[0037] In another embodiment, one end of the working platform 8 is rotatably connected to a ladder to facilitate climbing by the staff.

[0038] In another embodiment, a rotation limit device 11 is provided at the connection between the arch formwork 1 and the side formwork 2. The rotation limit device 11 includes an upper limit seat and a lower limit seat. The upper limit seat is located at the inner side of the bottom of the arch formwork 1 and is fixedly connected to the arch formwork 1. The lower limit seat is located at the inner side of the top of the side formwork 2 and is fixedly connected to the side formwork. The upper limit seat is rotatably connected to the lower limit seat. Therefore, when the side formwork 2 rotates inward to demould, the lower limit seat will rotate upward and exert an upward force on the upper limit seat, thereby keeping the arch formwork 1 fixed.

[0039] In another embodiment, a vertical support screw 22 is provided at the bottom of the side template 2, and a horizontal support screw 23 is provided between the side template 2 and the double side wall vertical support beams 9. Thus, after the trolley is in place, the vertical support screw 22 and the horizontal support screw 23 support the trolley as a whole, thereby improving the stability of the trolley. Before the trolley is demoulded, the vertical support screw 22 and the horizontal support screw 23 need to be removed to avoid obstruction to the demoulding of the trolley.

[0040] The above description is only the preferred embodiment of the utility model, not all embodiments. Anyone should be aware that structural changes made under the inspiration of the utility model, and all technical solutions that are the same or similar to the utility model, belong to the protection scope of the utility model.

Claims

1. Self-propelled hydraulic variable cross-section trolley without gantry, characterized in that: It comprises an arch formwork (1), side formworks (2) are arranged on both sides of the arch formwork (1), the side formworks (2) and the arch formwork (1) are rotatably connected, and a hydraulic walking system (3) is arranged at the bottom of the side formwork (2); A plurality of casting platforms (24) are arranged inside the side formwork (2) and the arch formwork (1); the casting platform (24) on the side formwork (2) is rotatably connected to the side formwork (2); the casting platform (24) on the arch formwork (1) is rotatably connected to the arch formwork (1); a first limiting device is arranged on the casting platform (24); and the first limiting device is used to adjust the rotation angle of the casting platform (24).

2. The self-propelled hydraulic gantry-less variable-section trolley according to claim 1, characterized in that: Rotating frames (7) are arranged at both ends inside the vault template (1); one end of the rotating frame (7) is rotatably connected to the vault template (1), and the other end is rotatably connected to a working platform (8).

3. The self-propelled hydraulic gantry-less variable-section trolley according to claim 2, characterized in that: One end of the working platform (8) is rotatably connected to a ladder.

4. The self-propelled hydraulic gantry-less variable-section trolley according to claim 1, characterized in that: A rotation limit device (11) is provided at the connection between the arch formwork (1) and the side formwork (2), and the rotation limit device (11) comprises an upper limit seat and a lower limit seat, the upper limit seat is located on the inner side of the bottom of the arch formwork (1) and is fixedly connected to the arch formwork (1), the lower limit seat is located on the inner side of the top of the side formwork (2) and is fixedly connected to the side formwork, and the upper limit seat is rotatably connected to the lower limit seat.

5. The self-propelled hydraulic gantry-less variable-section trolley according to claim 1, characterized in that: A first supporting device is arranged between the arch formwork (1) and the double-side wall vertical supporting beams (9), the first supporting device comprising a first base plate (4a) and a plurality of first supporting blocks (5a), the first base plate (4a) being arranged at the ends of the double-side wall vertical supporting beams (9), the first supporting blocks (5a) being evenly distributed at the bottom of the arch formwork (1) and opposite to the first base plate (4a), a roller (51) rotatably connected to the first supporting block (5a) being arranged at the bottom of the first supporting block (5a), a connecting plate (6) being arranged on the side of the first supporting block (5a), the connecting plate (6) being used for fixing the first base plate (4a) and the first supporting block (5a).

6. The self-propelled hydraulic gantry-less variable-section trolley according to claim 5, characterized in that: A second supporting device is provided between the side formwork (2) and the double side wall horizontal supporting beam (10), the second supporting device comprising a second bottom plate (4b) and a plurality of second supporting blocks (5b), the second bottom plate (4b) being L-shaped, one surface of the second bottom plate (4b) being in contact with the end of the double side wall horizontal supporting beam (10), and the other surface being in contact with the top of the side wall horizontal supporting beam, one end of the second supporting block (5b) being fixedly connected to the inner wall of the side formwork (2), and the other end being located above the second bottom plate (4b), the connecting plate (6) being located at the end of the first supporting block (5a) away from the side formwork (2), the connecting plate (6) being a triangular support (61), the triangular support (61) being slidably connected to the second supporting block (5b), and the triangular support (61) being used to fix the second bottom plate (4b) and the second supporting block (5b).

7. The self-propelled hydraulic variable cross-section trolley without a gantry as claimed in claim 6, characterized in that: The side formwork (2) and the arch formwork (1) are provided with casting windows corresponding to the casting platform (24), the vertical distance between the two casting windows is less than 3m, and the distance between the lowest casting window and the tunnel invert filling surface is less than 3m.

8. The self-propelled hydraulic variable-section trolley without a gantry as described in any one of claims 1 to 7, characterized in that: A plurality of support frames (21) are evenly distributed on the side formwork (2); the hydraulic walking system (3) is arranged at the bottom of the support frame (21); the hydraulic walking system (3) comprises a base (31); a lifting hydraulic cylinder (32) is arranged on the base (31); a sliding seat (33) is arranged on the piston rod of the lifting hydraulic cylinder (32); a moving hydraulic cylinder (34) is arranged on the sliding seat (33); a moving seat (35) is arranged on the piston rod of the moving hydraulic cylinder (34); the moving seat (35) is slidably connected to the sliding seat (33); The movable seat (35) is provided with a groove, a horizontal hydraulic cylinder (36) is provided in the groove, the telescopic direction of the horizontal hydraulic cylinder (36) is perpendicular to the telescopic direction of the movable hydraulic cylinder (34), a top block (37) is provided on the piston rod of the horizontal hydraulic cylinder (36), the top block (37) is slidably connected to the movable seat (35), a lower hinged support is provided on the top of the top block (37), an upper hinged support is provided at the bottom of the support frame (21), the upper hinged support is rotatably connected to the lower hinged support, and the support frame (21) is provided with more than four.

9. The self-propelled hydraulic variable-section trolley without a gantry as claimed in claim 8, characterized in that: A vertical supporting screw (22) is provided at the bottom of the side template (2).

10. The self-propelled hydraulic variable-section trolley without a gantry as claimed in claim 9, characterized in that: A horizontal support screw (23) is provided between the side formwork (2) and the double side wall vertical support beams (9).

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