A high-efficiency secondary grouting device for tunnel segment wall reinforcement

Abstract

This application relates to an efficient device for secondary grouting behind tunnel segments. The device includes: a mobile platform; rubber wheels mounted at the bottom of the mobile platform; a control box mounted on the mobile platform; a ring-shaped support mechanism mounted on the mobile platform and arranged around the tunnel cross-section; an adjustment mechanism arranged in a ring array along the ring-shaped support mechanism; and a grouting mechanism mounted on the mobile platform for storing and pumping grout. This application, by setting up multiple independent adjustment mechanisms and grouting nozzles capable of grouting the entire tunnel ring, and employing a centralized control automated system, achieves rapid positioning and synchronous / sequential grouting of multiple grouting points, improving grouting efficiency and reducing manual handling and adjustment time. It is particularly suitable for long-distance, large-section tunnel construction.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, and in particular to an efficient device for secondary grouting behind tunnel segments. Background Technology

[0002] In tunnel engineering using the shield tunneling method or tunnel boring machines, especially after the tunnel segments are assembled, to ensure the long-term stability, durability, and waterproofing requirements of the tunnel structure, secondary grouting is usually performed behind the segments after synchronous grouting. This is done using pre-reserved grouting interfaces to ensure a tight fit between the structures, shared load-bearing capacity, and the desired waterproofing effect. This process is crucial for controlling later tunnel deformation, preventing water leakage, and ensuring the overall structural safety. Currently, common secondary grouting methods mainly rely on manual or simple mechanical assistance. The typical process is: opening holes through pre-reserved secondary grouting holes in the shield tunnel segments, and manually connecting the grouting holes for secondary grouting. The existing technology has the following problems: First, the first ring segment has six reserved secondary grouting holes, and conventional secondary grouting equipment cannot meet the needs of secondary grouting at multiple points. Second, the grouting process requires frequent connection and disassembly of grouting equipment, which is labor-intensive and has low construction efficiency, especially in long-distance, large-section tunnels. The existing grouting method lacks an efficient integrated device for the grouting process after tunnel lining, and cannot quickly meet the grouting needs of different locations of the ring segment. Summary of the Invention

[0003] To address or partially address the problems existing in related technologies, this application provides an efficient secondary grouting device for tunnel segment walls, which can achieve rapid positioning and synchronous grouting of multiple grouting points, improve grouting operation efficiency, and reduce manual handling and adjustment time.

[0004] This application provides a high-efficiency secondary grouting device for tunnel segment wall backfilling, comprising: Mobile platform 1; Rubber wheels 2 are installed at the bottom of the mobile platform 1; Control box 3 is installed on mobile platform 1; A ring-shaped support mechanism 4 is installed on the mobile platform 1 and arranged around the tunnel cross section; Adjustment mechanism 5 is arranged in a ring array along the ring support mechanism 4; Grouting mechanism 6, installed on mobile platform 1, for storing and pumping grout; Each of the adjustment mechanisms 5 is equipped with a grouting nozzle mechanism 57. The grouting mechanism 6 is connected to each grouting nozzle mechanism 57 through pipelines. The control box 3 is communicatively connected to the drive system of the mobile platform 1, the adjustment mechanism 5, and the grouting mechanism 6.

[0005] Optionally, in some embodiments, the annular support mechanism 4 includes a portal frame 41 mounted on the mobile platform 1. An extension rod 42 that can extend along the tunnel cross-section is connected to the portal frame 41. Connecting rods 43 are evenly arranged on the circumferential surface of the extension rod 42, and an annular plate 44 is connected through the connecting rods 43. An annular sliding groove 45 is provided on the annular plate 44, and the adjusting mechanism 5 is slidably connected to the annular sliding groove 45.

[0006] Optionally, in some embodiments, the adjusting mechanism 5 includes an adjusting slider 51 slidably disposed within an annular sliding groove 45, a limiting slider 52 disposed on the adjusting slider 51, an annular limiting groove 46 adapted to the limiting slider 52 disposed on the inner side of the annular sliding groove 45, a positioning extension plate 53 disposed on the adjusting slider 51, the positioning extension plate 53 having a bolt hole 54 extending through the front and rear, a locking bolt 55 being installed in the inner thread of the bolt hole 54, the end of the locking bolt 55 abutting against the end face of the annular plate 44, and a hydraulic cylinder 56 connected to the positioning extension plate 53 via a mounting plate, the piston rod end of the hydraulic cylinder 56 extending radially outward along the annular plate 44 and connected to the grouting nozzle mechanism 57.

[0007] Optionally, in some embodiments, the grouting nozzle mechanism 57 includes a mounting plate 571 connected to the end of the piston rod of the hydraulic cylinder 56. A grouting nozzle 572 is provided on the mounting plate 571. The grouting nozzle 572 includes a pressure sensor and a flow sensor inside, and a conical rubber plug 573 is provided at its end. The grouting nozzle 572 is connected to the grouting mechanism 6 through a high-pressure grouting hose 574.

[0008] Optionally, in some embodiments, the grouting mechanism 6 includes a grout storage tank 61, a grout pump 62, and a hollow distribution plate 65. The inlet of the grout pump 62 is connected to the bottom of the grout storage tank 61 through a grout extraction pipe 64, and the outlet is connected to the hollow distribution plate 65 through a grout delivery pipe 63. The hollow distribution plate 65 is connected to each high-pressure grouting hose 574 through branch pipes.

[0009] Optionally, in some embodiments, the branch pipeline is equipped with an electrically controlled valve 66, and each electrically controlled valve 66 is electrically connected to the control box 3.

[0010] The technical solution provided in this application may include the following beneficial effects: This application, by setting up multiple independent adjustment mechanisms and grouting nozzles for the entire tunnel loop and adopting a centralized control automated system, realizes rapid positioning and synchronous / sequential grouting of multiple grouting points, improves grouting operation efficiency, and reduces manual handling and adjustment time, making it particularly suitable for long-distance, large-section tunnel construction.

[0011] By integrating pressure and flow sensors into each grouting nozzle and combining them with a programmable logic controller to monitor and control the grouting process in real time, the grouting pressure and flow rate at each grouting point can be precisely controlled, ensuring that the gaps behind the lining are filled densely and uniformly, improving the grouting quality and the waterproof performance of the structure, while reducing grout waste.

[0012] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0013] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0014] Figure 1 This is a schematic diagram of the structure of the efficient secondary grouting device behind the tunnel segment wall shown in the embodiments of this application; Figure 2 This is a schematic diagram of the ring-shaped support mechanism shown in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the adjustment mechanism shown in the embodiments of this application; Figure 4 yes Figure 3 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the grouting mechanism shown in the embodiments of this application.

[0015] Figure label: 1. Mobile platform; 2. Rubber casters; 3. Control box; 4. Annular support mechanism; 41. Portal support; 42. Extension rod; 43. Connecting rod; 44. Annular plate; 45. Annular sliding groove; 46. Annular limiting groove; 5. Adjustment mechanism; 51. Adjustment slider; 52. Limit slider; 53. Positioning extension plate; 54. Bolt hole; 55. Locking bolt; 56. Hydraulic cylinder; 57. Grouting nozzle mechanism; 571. Mounting plate; 572. Grouting nozzle; 573. Conical rubber plug; 574. High-pressure grouting hose; 6. Grouting mechanism; 61. Grout storage tank; 62. Grout pump; 63. Grout delivery pipe; 64. Grout extraction pipe; 65. Hollow distribution plate; 66. Electrically controlled valve. Detailed Implementation

[0016] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0017] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0018] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0019] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] To address the aforementioned issues, this application provides an efficient secondary grouting device for tunnel segment walls, which enables rapid positioning and synchronous grouting of multiple grouting points, improving grouting operation efficiency and reducing manual handling and adjustment time.

[0021] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0022] See Figure 1 The aforementioned high-efficiency secondary grouting device for tunnel segment wall backfilling includes: Mobile platform 1; Rubber wheels 2 are installed at the bottom of the mobile platform 1; Control box 3 is installed on mobile platform 1; A ring-shaped support mechanism 4 is installed on the mobile platform 1 and arranged around the tunnel cross section; Adjustment mechanism 5 is arranged in a ring array along the ring support mechanism 4; Grouting mechanism 6, installed on mobile platform 1, for storing and pumping grout; Each of the adjustment mechanisms 5 is equipped with a grouting nozzle mechanism 57. The grouting mechanism 6 is connected to each grouting nozzle mechanism 57 through pipelines. The control box 3 is communicatively connected to the drive system of the mobile platform 1, the adjustment mechanism 5, and the grouting mechanism 6.

[0023] During operation, the mobile platform 1 serves as the load-bearing and moving base for the entire device. Rubber wheels 2 are symmetrically installed at the four corners of its bottom. The rubber wheels 2 have good ground adaptability and cushioning performance, facilitating smooth movement on uneven ground inside the tunnel. The mobile platform 1 integrates a drive system, which can be driven by a motor, hydraulically, or by a hybrid electro-hydraulic drive. It is connected to the control box 3 to realize the forward, backward, and parking control of the device. The rubber wheels 2 are omnidirectional wheels, with at least one pair being drive wheels. They have built-in motors and reducers and are uniformly controlled by the control box 3. The tires have wear-resistant and anti-slip patterns, making them suitable for wet and slippery uneven ground in tunnels.

[0024] The control box 3 is fixedly installed in the middle of the upper surface of the mobile platform 1. It is equipped with a programmable logic controller (PLC) and a human-machine interface. The human-machine interface adopts a combination of touch screen or button and display screen. It is used to input process parameters such as tunnel cross-section parameters, coordinates of pre-embedded grouting point positions, and grouting pressure and flow rate settings. The PLC automatically plans the movement path and grouting sequence of the adjustment mechanism 5 according to the input parameters, and centrally controls the drive system of the mobile platform 1, the execution units of each adjustment mechanism 5, and the power and valve components of the grouting mechanism 6 to realize automated or semi-automated operation.

[0025] See Figure 2 In some embodiments, the annular support mechanism 4 includes a portal frame 41 mounted on a mobile platform 1. An extension rod 42 that can extend along the profile of the tunnel cross section is connected to the portal frame 41. Connecting rods 43 are evenly arranged on the circumferential surface of the extension rod 42, and an annular plate 44 is connected through the connecting rods 43. An annular sliding groove 45 is provided on the annular plate 44, and the adjusting mechanism 5 is slidably connected to the annular sliding groove 45.

[0026] During operation, the annular support mechanism 4 is fixedly installed on the mobile platform 1 and located on one side of the control box 3. This mechanism is used to support and guide multiple adjustment mechanisms 5 arranged along the tunnel cross-section contour. The adjustment mechanisms 5 are slidably installed in the annular sliding groove 45.

[0027] See Figure 3 In some embodiments, the adjustment mechanism 5 includes an adjustment slider 51 slidably disposed in an annular sliding groove 45, a limit slider 52 disposed on the adjustment slider 51, an annular limit groove 46 adapted to the limit slider 52 disposed on the inner side of the annular sliding groove 45, a positioning extension plate 53 disposed on the adjustment slider 51, the positioning extension plate 53 having a bolt hole 54 extending through the front and rear, a locking bolt 55 being installed in the inner thread of the bolt hole 54, the end of the locking bolt 55 abutting against the end face of the annular plate 44, and a hydraulic cylinder 56 connected to the positioning extension plate 53 via a mounting plate, the piston rod end of the hydraulic cylinder 56 extending outward along the radial direction of the annular plate 44 and connected to the grouting nozzle mechanism 57.

[0028] During operation, multiple adjustment mechanisms 5 are evenly distributed along the circumference of the annular plate 44. Each adjustment mechanism 5 is independently controllable. The adjustment slider 51 is slidably embedded in the annular sliding groove 45. A limiting slider 52 is fixedly provided on the outside of the adjustment slider 51. The limiting slider 52 is engaged in the annular limiting groove 46. The two work together to prevent the adjustment slider 51 from coming out of the annular sliding groove 45, while ensuring that it slides smoothly along the annular trajectory. The positioning extension plate 53 is fixed on the adjustment slider 51 and extends away from the center of the moving platform. The positioning extension plate 53 has openings... Bolt hole 54, together with locking bolt 55, constitutes a locking component. When the adjusting slider 51 slides to the predetermined circumferential position, tightening the locking bolt 55 presses its end against the side of the annular plate 44, thus firmly locking the adjusting slider 51. The cylinder end of the hydraulic cylinder 56 is hinged or fixed to the positioning extension plate 53, and the extended end of its piston rod is connected to the grouting nozzle mechanism 57. The extension and retraction of the hydraulic cylinder 56 is controlled by the control box 3, which is used to drive the grouting nozzle mechanism 57 to move radially along the tunnel cross section to approach or align with the pre-embedded grouting pipe interface on the lining.

[0029] See Figure 4 In some embodiments, the grouting nozzle mechanism 57 includes a mounting plate 571 connected to the end of the piston rod of the hydraulic cylinder 56. A grouting nozzle 572 is provided on the mounting plate 571. The grouting nozzle 572 includes a pressure sensor and a flow sensor inside, and a conical rubber plug 573 is provided at its end. The grouting nozzle 572 is connected to the grouting mechanism 6 through a high-pressure grouting hose 574.

[0030] During operation, the grouting nozzle mechanism 57 is the end component that directly performs the grouting function. The grouting nozzle 572 is a hollow metal tubular structure. A conical rubber plug 573 is fitted on one end near the lining. The design of the conical rubber plug 573 allows it to adapt to the pre-embedded grouting pipe interfaces of different diameters, achieving a sealed connection and preventing grout leakage during the grouting process. The tail end of the grouting nozzle 572 is connected to the grouting mechanism 6 through a high-pressure grouting hose 574.

[0031] See Figure 5 In some embodiments, the grouting mechanism 6 includes a grout storage tank 61, a grout pump 62, and a hollow distribution plate 65. The inlet of the grout pump 62 is connected to the bottom of the grout storage tank 61 via a grout extraction pipe 64, and the outlet is connected to the hollow distribution plate 65 via a grout delivery pipe 63. The hollow distribution plate 65 is connected to various high-pressure grouting hoses 574 via branch pipes. Electrically controlled valves 66 are installed on the branch pipes, and each electrically controlled valve 66 is electrically connected to the control box 3.

[0032] During operation, the grouting mechanism 6 is fixedly installed on the mobile platform 1, typically located on the other side of the control box 3, to balance the platform load. During operation, the hollow distribution plate 65 is an annular or multi-channel distributor with an internal cavity. It has multiple grout outlets on its circumference, and each grout outlet is connected to the corresponding high-pressure grouting hose 574 through a branch pipe. Each branch pipe is equipped with an electrically controlled valve 66, which is a normally closed solenoid valve with a pressure resistance of not less than 1.5 times the maximum working pressure of the grouting system. The valve body is made of stainless steel and is suitable for cement-based grout media. Each electrically controlled valve 66 is electrically connected to the PLC in the control box 3. The PLC can independently control the opening and closing of each electrically controlled valve 66, thereby realizing independent and precise control of the grouting operation of each grouting nozzle 572.

[0033] The working process of this application: The device is moved to the section of the tunnel to be grouted. Parameters such as the cross-sectional dimensions of the tunnel section and the distribution of pre-embedded grouting points are input through the human-machine interface of control box 3. Based on the input parameters, the PLC in control box 3 automatically plans the movement sequence of each adjustment mechanism 5. First, it controls the hydraulic cylinders 56 of each adjustment mechanism 5 to retract, causing the grouting nozzle mechanism 57 to retract. Then, the PLC controls each adjusting slider 51 to slide synchronously or sequentially within the annular sliding groove 45, moving the grouting nozzle mechanism 57 to the circumferential position corresponding to the pre-embedded grouting point. Once in position, the locking bolts 55 are automatically or manually tightened by the PLC prompt. Next, the PLC controls each hydraulic cylinder 56 to extend, pushing the grouting nozzle mechanism 57 radially until the conical rubber plug 573 at the end of the grouting nozzle 572 is tightly inserted into the pre-embedded grouting pipe interface of the lining. After all grouting nozzles are connected, the operator starts grouting through control box 3. The program first controls the grout pump 62 to start, pumping the grout from the storage tank 61. Then, according to the preset sequence and process parameters such as pressure, flow rate, and time, the corresponding branch electrical control valves 66 are opened sequentially or in groups. The grout is injected into the gap behind the lining through the hollow distribution plate 65 and the high-pressure grouting hose 574 from the grouting nozzle 572. The PLC monitors the grouting status in real time through pressure and flow sensors installed on the pipeline or nozzle, realizing closed-loop control to ensure that each grouting point is fully filled and the pressure is stable. After grouting all points of the current section is completed, the PLC controls all hydraulic cylinders 56 to retract, separating the grouting nozzle from the pre-embedded pipe, loosening the locking bolts 55, and resetting the adjustment mechanism 5 to the initial or next work preparation position. Finally, the PLC controls the moving platform 1 to move to the next grouting operation section and repeats the above steps to achieve continuous and efficient long-distance tunnel lining secondary grouting construction behind the tunnel lining segments.

[0034] Finally, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "include," "contain," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0035] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0036] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A high-efficiency secondary grouting device for tunnel segment wall backfilling, characterized in that: The aforementioned high-efficiency secondary grouting device for tunnel segment wall backfilling includes: Mobile platform (1); Rubber wheels (2) are set at the bottom of the mobile platform (1); A control box (3) is installed on the mobile platform (1); A ring-shaped support mechanism (4) is set on the mobile platform (1) and arranged around the tunnel cross section. Adjustment mechanism (5) arranged in a ring array along the ring support mechanism (4); Grouting mechanism (6) installed on mobile platform (1) for storing and pumping grout. Among them, the adjustment mechanism (5) is equipped with a grouting nozzle mechanism (57), the grouting mechanism (6) is connected to each grouting nozzle mechanism (57) through a pipeline, and the control box (3) is connected to the drive system, adjustment mechanism (5) and grouting mechanism (6) of the mobile platform (1) in communication. The grouting nozzle mechanism (57) includes a mounting plate (571) connected to the piston rod end of the hydraulic cylinder (56). A grouting nozzle (572) is provided on the mounting plate (571). The grouting nozzle (572) includes a pressure sensor and a flow sensor inside. A conical rubber plug (573) is provided at the end. The grouting nozzle (572) is connected to the grouting mechanism (6) through a high-pressure grouting hose (574).

2. The device for efficient construction of tunnel segment wall back secondary grouting according to claim 1, characterized in that: The ring support mechanism (4) includes a portal frame (41) installed on the mobile platform (1). An extension rod (42) that can extend along the tunnel cross-section is connected to the portal frame (41). Connecting rods (43) are evenly arranged on the circumferential surface of the extension rod (42), and an annular plate (44) is connected through the connecting rods (43). An annular sliding groove (45) is provided on the annular plate (44), and the adjustment mechanism (5) is slidably connected to the annular sliding groove (45).

3. The device for efficient construction of tunnel segment wall back secondary grouting according to claim 2, characterized in that: The adjustment mechanism (5) includes an adjustment slider (51) slidably disposed in an annular sliding groove (45), a limit slider (52) is provided on the adjustment slider (51), an annular limit groove (46) adapted to the limit slider (52) is provided on the inner side of the annular sliding groove (45), a positioning extension plate (53) is provided on the adjustment slider (51), a bolt hole (54) is provided in the positioning extension plate (53) with a through bolt hole (54) in the front and back, a locking bolt (55) is installed in the inner thread of the bolt hole (54), the end of the locking bolt (55) abuts against the end face of the annular plate (44), a hydraulic cylinder (56) is connected to the positioning extension plate (53) through a mounting plate, the piston rod end of the hydraulic cylinder (56) extends outward along the radial direction of the annular plate (44) and is connected to the grouting nozzle mechanism (57).

4. The efficient secondary grouting device behind tunnel segment walls according to claim 3, characterized in that: The grouting mechanism (6) includes a grout storage tank (61), a grout pump (62), and a hollow distribution plate (65). The inlet of the grout pump (62) is connected to the bottom of the grout storage tank (61) through a grout extraction pipe (64), and the outlet is connected to the hollow distribution plate (65) through a grout delivery pipe (63). The hollow distribution plate (65) is connected to each high-pressure grouting hose (574) through branch pipes.

5. The efficient secondary grouting device behind tunnel segment walls according to claim 4, characterized in that: The branch pipeline is equipped with an electrically controlled valve (66), and each electrically controlled valve (66) is electrically connected to the control box (3).

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