Shield tunneling machine duct piece wall back grouting mechanism

Abstract

The utility model discloses a shield tunneling machine duct piece wall back grouting mechanism, which belongs to the technical field of shield tunneling machines and structurally comprises a back shield shell, a front end plate is fixed at one end of the back shield shell, an inner shell is fixed on the inner side face of the other end of the back shield shell, an annular plate is rotatably connected between the inner shell and the back shield shell, and a rotating plate is fixed on one side of the annular plate. A plurality of sets of grouting pipes are fixed to the annular plate, the rotating plate is rotationally connected to the end face of the front end plate, two arc-shaped racks are arranged on the inner side wall of the rotating plate, and a transmission assembly used for driving the rotating plate to reciprocate is fixed to the inner side of the front end plate. According to the shield tunneling machine duct piece wall back grouting mechanism, dynamic grouting can be carried out, the swing amplitude and fluidity of mortar during spraying are increased, the grouting amplitude of each grouting pipe is enlarged, the mortar can be sprayed in gaps of a tunnel wall in a multi-angle mode, the mortar can be attached to the outer wall of a duct piece and the inner wall of a tunnel more tightly, and the grouting effect is better. And the grouting quality of the duct piece behind the wall is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, and particularly relates to a grouting mechanism behind the segments of a shield machine. Background Art

[0002] The shield method is a fully mechanized construction method in the subaqueous tunneling method. It is to push the shield machine in the ground, prevent the surrounding rock from collapsing into the tunnel by the shield shell and the segment support, while using a cutting device to excavate the soil in front of the excavation face, and the excavated soil and stone are transported out of the tunnel by the soil removal machine, and jacked forward by the jacks at the rear, and precast concrete segments are assembled. Multiple precast concrete segments form a segment ring, and the shield machine jacks against the segment ring to move forward, forming a tunnel structure. Since there is a certain gap between the segment ring and the tunnel body, in order to prevent phenomena such as segment and soil settlement, it is necessary to carry out grouting construction on the gap behind the segment ring wall. At present, the segment grouting of the shield machine is basically carried out synchronously during the excavation and advancement of the shield machine.

[0003] However, the current synchronous grouting is difficult to ensure the uniform injection of mortar. Especially in the intersection area of the grouting ranges of each grouting port, there is a lack of mortar, resulting in the gap between the segment ring and the tunnel body not being fully and evenly filled with mortar. This requires workers to carry out secondary grouting of mortar through the reserved holes of the segments, increasing the workload. Moreover, the secondary grouting operation of mortar cannot accurately locate the position where the mortar is insufficient, resulting in the problem of insufficient mortar in some areas. Insufficient grouting volume may cause ground deformation or even surface collapse, posing a great safety hazard. Content of the Utility Model

[0004] In order to solve the above deficiencies in the prior art, the purpose of the utility model is to provide a grouting mechanism behind the segments of a shield machine. The grouting mechanism behind the segments of the shield machine can perform dynamic grouting, increase the swing amplitude and fluidity when the mortar is ejected, expand the grouting range of each grouting pipe, make the mortar fill more fully and evenly, and the mortar can be sprayed into the gaps of the tunnel wall at multiple angles, so that the mortar adheres more tightly to the outer wall of the segment and the inner wall of the tunnel, improving the grouting quality behind the segment wall.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A grouting mechanism behind the segment of a shield machine is provided, which includes a rear shield housing. One end of the rear shield housing is fixed with a front end plate, and the inner side surface of the other end of the rear shield housing is fixed with an inner housing. A ring plate is rotatably connected between the inner housing and the rear shield housing. One side of the ring plate is fixed with a rotating plate, and a number of grouting pipes are fixed on the ring plate. The rotating plate is rotatably connected to the end surface of the front end plate. Two arc-shaped racks are arranged on the inner side wall of the rotating plate, and a transmission component for driving the rotating plate to reciprocate is fixed on the inner side of the front end plate;

[0007] The transmission component includes a number of mounting seats installed on the inner side wall of the front end plate. The number of the mounting seats is an even number, and a sprocket is rotatably connected in each mounting seat. A number of sprockets are connected by a chain drive. One side of two of the mounting seats is rotatably connected with a gear a and a missing gear respectively. The missing gear is intermittently meshed with the gear a. One of the missing gears is fixedly connected with the rotating shaft of the sprocket, and the rotating shaft of the other missing gear is fixedly sleeved with a reversing gear. A gear b is fixed on the rotating shaft of a sprocket adjacent to the reversing gear, and the gear b is meshed with the reversing gear.

[0008] Further, an annular groove is formed on one side of the front end plate, and a ring rail is arranged at one end of the rotating plate. The ring rail is rotatably connected in the annular groove.

[0009] Further, a number of support plates are fixed between the inner housing and the rear shield housing. Each group of grouting pipes is located between two adjacent support plates, and the ring plate and the rotating plate are fixedly connected by a number of cross plates.

[0010] Further, one end of the grouting pipe penetrates through the ring plate and is rotatably connected with the ring plate, and the other end of the grouting pipe is fixedly communicated with a transition pipe. The transition pipe is rotatably connected with the grouting pipe. A gear c is fixedly sleeved on the circumferential surface of the grouting pipe, and an annular rack is arranged on the inner side surface of the rear shield housing. The annular rack is meshed with the gear c.

[0011] Further, the transition pipe is fixed on one side of the cross plate through a bracket, and the gear c is located between the rear shield housing and the inner housing.

[0012] Further, a slurry outlet hole is formed at one end of the grouting pipe, and a number of strip-shaped holes are formed on the circumferential surface of one end of the grouting pipe.

[0013] Further, the two arc-shaped racks are located on the same diameter of the rotating plate. One side of one of the mounting seats is fixed with a servo motor through a bracket. The rotating shaft of the sprocket penetrates through the mounting seat and is fixedly connected with the rotating shaft of the servo motor through a coupling. The two missing gears are located on the same diameter of the front end plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The grouting mechanism behind the segment of the shield machine according to the example of the present utility model drives the sprocket to rotate stably through the servo motor, so that the two split gears rotate synchronously and stably. One of the split gears rotates in the opposite direction to the other under the action of the reversing gear, so that the two split gears alternately mesh to drive the corresponding gear a. The two gears a alternately drive the two arc-shaped racks in opposite rotation directions, so that the rotating plate can rotate forward by a certain angle and then reverse to reset, realizing the reciprocating swing of the slurry outlet end of the grouting pipe in an arc shape, performing dynamic grouting, increasing the swing amplitude and fluidity when the mortar is ejected, expanding the grouting range of each grouting pipe, enabling the gaps behind the segment wall to be evenly and fully filled with mortar. Only one servo motor is required to drive the entire transmission assembly, and the servo motor does not need to change the rotation direction, with a compact structure and fast response speed.

[0016] 2. The grouting mechanism behind the segment of the shield machine according to the example of the present utility model, through the meshing connection of gear c and the annular rack, enables the grouting pipe to rotate in a reciprocating arc shape along with the ring plate and also be able to rotate self - sufficiently. Gear c drives the grouting pipe to rotate forward and reverse alternately, so that the strip - shaped holes can spray out mortar, and the mortar can be sprayed at multiple angles into the gaps in the tunnel wall, making the mortar adhere more closely to the outer wall of the segment and the inner wall of the tunnel, improving the grouting quality behind the segment wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0018] Figure 1 is the structural schematic diagram of the present utility model;

[0019] Figure 2 is the internal structural schematic diagram of the present utility model;

[0020] Figure 3 is the structural schematic diagram when the ring plate, cross - plate and rotating plate of the present utility model are connected;

[0021] Figure 4 is the present utility model Figure 3 structural schematic diagram from another angle;

[0022] Figure 5 is the structural schematic diagram when the grouting pipe and the transition pipe of the present utility model are matched;

[0023] Figure 6 is the structural schematic diagram of the transverse section when the front end plate, rear support housing and inner housing of the present utility model are connected;

[0024] Figure 7 is the structural schematic diagram of the transmission assembly of the present utility model.

[0025] In the figure, 1. front end plate, 2. rear support housing, 3. inner housing, 4. ring plate, 5. transverse plate, 6. rotating plate, 7. transmission assembly, 71. mounting seat, 72. sprocket, 73. chain, 74. gear a, 75. split gear, 76. servo motor, 77. gear b, 78. reversing gear, 8. grouting pipe, 9. transition pipe, 10. arc rack, 11. gear c, 12. slurry outlet hole, 13. strip hole, 14. annular rack, 15. support plate, 16. annular groove. Detailed implementation mode

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0027] Generally, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0028] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the drawings.

[0032] Example 1: Reference Figure 1-7 A shield machine segment wall rear grouting mechanism shown in the figure comprises a rear shield shell 2, a front end plate 1 is fixed at one end of the rear shield shell 2, the front end plate 1 is an annular end plate, and an inner shell 3 is fixed to the inner side surface of the other end of the rear shield shell 2, a ring plate 4 is rotatably connected between the inner shell 3 and the rear shield shell 2, a rotating plate 6 is fixed to one side of the ring plate 4, and a plurality of groups of grouting pipes 8 are fixed on the ring plate 4, a grouting hole 12 is opened at one end of the grouting pipe 8, the rotating plate 6 is rotatably connected to the end surface of the front end plate 1, two arc-shaped racks 10 are arranged on the inner side wall of the rotating plate 6, and a transmission component 7 for driving the rotating plate 6 to reciprocate is fixed to the inner side of the front end plate 1;

[0033] The transmission assembly 7 includes a plurality of mounting seats 71 mounted on the inner side wall of the front end plate 1, the number of the mounting seats 71 is an even number, and a sprocket 72 is rotatably connected in each mounting seat 71, and the plurality of sprockets 72 are transmission-connected through a chain 73, wherein one side of two mounting seats 71 is rotatably connected with a gear a74 and a missing gear 75, and the missing gear 75 is intermittently meshed with the gear a74, wherein one missing gear 75 is fixedly connected with the rotating shaft of the sprocket 72, and the rotating shaft of the other missing gear 75 is fixedly sleeved with a reversing gear 78, and the rotating shaft of a sprocket 72 adjacent to the reversing gear 78 is fixed with a gear b77, and the gear b77 is meshed with the reversing gear 78;

[0034] The two arc-shaped racks 10 are located on the same diameter of the rotating plate 6, and a servo motor 76 is fixed to one side of one mounting seat 71 through a bracket. The rotating shaft of the sprocket 72 passes through the mounting seat 71 and is fixedly connected to the rotating shaft of the servo motor 76 through a coupling. The two missing gears 75 are located on the same diameter of the front end plate 1.

[0035] This grouting mechanism is installed at the tail of the middle shield of the shield machine. During the tunneling process of the shield machine, the inner shell 3 and the rear shield shell 2 are located between the tunnel inner wall and the segment ring. One end of the grouting pipe 8 is communicated with the mortar pool, and under the action of the mortar pump, the mortar is pumped into the grouting pipe 8, so that the mortar can be ejected from the slurry outlet hole 12 at one end of the grouting pipe 8. During the grouting construction of the gap behind the segment ring wall by the grouting pipe 8, the servo motor 76 drives the sprocket 72 to rotate. Driven by the chain 73, several sprockets 72 rotate synchronously. At this time, the two split gears 75 rotate synchronously with the sprocket 72. The meshing connection between the gear b 77 and the reversing gear 78 causes one of the split gears 75 to rotate in the opposite direction to the other split gear 75 under the action of the reversing gear 78. The two split gears 75 alternately drive the two gears a 74. When one of the split gears 75 drives the adjacent gear a 74 to rotate, through the meshing connection between the gear a 74 and the arc-shaped rack 10, the gear a 74 drives the rotating plate 6 to rotate a certain angle. Subsequently, the meshing between this split gear 75 and its adjacent gear a 74 is disconnected, and then the other split gear 75 drives the adjacent gear a 74 to rotate in the reverse direction. Also, because this gear a 74 is meshed with another arc-shaped rack 10, the gear a 74 drives the rotating plate 6 to rotate in the reverse direction by the same angle and return to the initial position. During the rotation process of the rotating plate 6, the ring plate 4 will be driven to rotate forward by a certain angle synchronously and then reverse to reset. The slurry outlet hole 12 swings back and forth in an arc and ejects the mortar, realizing dynamic grouting.

[0036] In order to enable the rotating plate 6 to be rotatably connected to the front end plate 1, in this embodiment, an annular groove 16 is provided on one side of the front end plate 1, and a ring rail is provided at one end of the rotating plate 6. The ring rail is rotatably connected in the annular groove 16.

[0037] In order to fix the inner shell 3 inside the front end plate 1 and firmly fix the ring plate 4 and the rotating plate 6 together, in this embodiment, a number of support plates 15 are fixed between the inner shell 3 and the rear shield shell 2. Each group of grouting pipes 8 is located between two adjacent support plates 15. The ring plate 4 and the rotating plate 6 are fixedly connected by a number of cross plates 5.

[0038] Embodiment Two:

[0039] The features identical to those of Embodiment One in this embodiment will not be described in detail. The features different from those of Embodiment One in this embodiment are as follows:

[0040] In order to enable the mortar to be sprayed out in a rotating manner, in this embodiment, one end of the grouting pipe 8 penetrates through the ring plate 4 and is rotatably connected to the ring plate 4, and the other end of the grouting pipe 8 is fixedly communicated with a transition pipe 9. The transition pipe 9 is rotatably connected to the grouting pipe 8. A gear c 11 is fixedly sleeved on the circumferential side of the grouting pipe 8. The gear c 11 is located between the rear support shell 2 and the inner shell 3. An annular rack 14 is provided on the inner side surface of the rear support shell 2. The annular rack 14 is meshed with the gear c 11. A plurality of strip-shaped holes 13 are formed in the circumferential side surface of one end of the grouting pipe 8. The transition pipe 9 is fixed to one side of the transverse plate 5 through a bracket, so that the transition pipe 9 can be firmly fixed between the ring plate 4 and the rotating plate 6.

[0041] One end of the transition pipe 9 is communicated with the mortar pool, and under the action of the mortar pump, the mortar is pumped into the transition pipe 9. The mortar then enters the grouting pipe 8 through the transition pipe 9 and is finally sprayed out through the slurry outlet holes 12 and the strip-shaped holes 13. When the ring plate 4 rotates in a reciprocating arc, due to the meshing connection between the gear c 11 and the annular rack 14, the grouting pipe 8 will rotate around its own axis while revolving around the center of the ring plate 4. Under the action of the annular rack 14, the gear c 11 will drive the grouting pipe 8 to rotate forward and backward alternately, so that the strip-shaped holes 13 can spray out the mortar in a rotating manner, and the mortar can be sprayed onto the gaps in the tunnel wall at multiple angles, making the adhesion between the mortar and the outer wall of the segment and the inner wall of the tunnel closer, and improving the grouting quality behind the segment wall.

[0042] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept of the utility model. For example, a technical solution formed by mutually replacing the above features with technical features (but not limited to) having similar functions disclosed in the present application.

[0043] Except for the technical features described in the specification, the rest of the technical features are well-known technologies to those skilled in the art. To highlight the innovative features of the present utility model, the rest of the technical features will not be elaborated herein.

Claims

1. A grouting mechanism behind the segment of a shield machine, characterized in that, The invention comprises a rear shield shell (2), wherein a front end plate (1) is fixed to one end of the rear shield shell (2), and an inner shell (3) is fixed to the inner side surface of the other end of the rear shield shell (2), a ring plate (4) is rotatably connected between the inner shell (3) and the rear shield shell (2), a rotating plate (6) is fixed to one side of the ring plate (4), and a plurality of groups of grouting pipes (8) are fixed to the ring plate (4), the rotating plate (6) is rotatably connected to the end surface of the front end plate (1), two arc-shaped racks (10) are provided on the inner side wall of the rotating plate (6), and a transmission assembly (7) for driving the rotating plate (6) to reciprocate is fixed to the inner side of the front end plate (1); The transmission assembly (7) comprises a plurality of mounting seats (71) mounted on the inner side wall of the front end plate (1), the number of the mounting seats (71) being an even number, and a sprocket (72) being rotatably connected in each mounting seat (71), the plurality of sprockets (72) being transmission-connected via a chain (73), wherein one side of two mounting seats (71) is rotatably connected with a gear a (74) and a missing gear (75), the missing gear (75) being intermittently meshed with the gear a (74), wherein one of the missing gears (75) is fixedly connected to the rotating shaft of the sprocket (72), the rotating shaft of the other missing gear (75) being fixedly sleeved with a reversing gear (78), the rotating shaft of a sprocket (72) adjacent to the reversing gear (78) being fixed with a gear b (77), the gear b (77) being meshed with the reversing gear (78).

2. The post - grouting mechanism behind the segment of the shield machine according to claim 1, characterized in that, An annular groove (16) is provided on one side of the front end plate (1), and an annular rail is provided on one end of the rotating plate (6), wherein the annular rail is rotatably connected in the annular groove (16).

3. The post-grouting mechanism behind the segment of the shield machine according to claim 2, wherein, A plurality of support plates (15) are fixed between the inner shell (3) and the back shell (2), each group of grouting pipes (8) is located between two adjacent support plates (15), and the ring plate (4) and the rotating plate (6) are fixedly connected via a plurality of transverse plates (5).

4. The grouting mechanism behind the segment of the shield machine according to claim 3, wherein One end of the grouting pipe (8) passes through the ring plate (4) and is rotatably connected to the ring plate (4), and the other end of the grouting pipe (8) is fixedly connected to a transition pipe (9), and the transition pipe (9) is rotatably connected to the grouting pipe (8). A gear c (11) is fixedly sleeved on the side surface of the grouting pipe (8), and an annular rack (14) is provided on the inner side surface of the back shell (2), and the annular rack (14) is meshingly connected to the gear c (11).

5. The post-grouting mechanism behind the segment of the shield machine according to claim 4, wherein The transition pipe (9) is fixed to one side of the transverse plate (5) via a bracket, and the gear c (11) is located between the rear shield housing (2) and the inner housing (3).

6. The post-grouting mechanism behind the segment of the shield machine according to claim 5, characterized in that, A grouting hole (12) is provided at one end of the grouting pipe (8), and a plurality of strip-shaped holes (13) are provided on the side surface around one end of the grouting pipe (8).

7. The grouting mechanism behind the segment of the shield machine according to any one of claims 1-6, characterized in that, The two arc-shaped racks (10) are located on the same diameter of the rotating plate (6); a servo motor (76) is fixed to one side of one of the mounting seats (71) via a bracket; the rotating shaft of the sprocket (72) passes through the mounting seat (71) and is fixedly connected to the rotating shaft of the servo motor (76) via a coupling; and the two missing gears (75) are located on the same diameter of the front end plate (1).

Images