A synchronous grouting device for shield tunnel construction

Abstract

The application discloses a synchronous grouting device for shield tunnel construction, which comprises a shield machine, a shield block and a main body. The front end of the shield machine is provided with the shield block, and the main body is arranged at the central position of the shield machine. The main body comprises a surrounding body, an inner cavity, a grout pipe, a grout outlet pipe, a monitoring device and a scraper. The monitoring device comprises a frame body, a movable slot, an extension device and a triggering device. The extension device comprises a fixed seat, an extension column, a contact block, a lower top block and a return spring. The extension device is pressed downward by the grout in the gap, so that the extension device is pressed against the triggering device, an alarm can be triggered to remind the staff to stop grouting. The pressure of the grout pushes the contact block to drive the extension column to move downward, so that the lower top block can contact the triggering device to trigger the alarm, reminding the staff to stop grouting, and the situation that the gap is not filled with the grout can be prevented.

Description

Technical Field

[0001] This invention relates to the field of shield tunnel construction technology, specifically a synchronous grouting device for shield tunnel construction. Background Technology

[0002] Synchronous grouting is a crucial process in shield tunnel construction, playing a vital role in the stability of the ring tunnel structure and the control of deformation of the surrounding soil. During the advancement of the shield machine, gaps will appear between the tunnel segments and the soil. To fill these gaps, a certain pressure must be maintained during the advancement of the shield machine, and grout must be continuously injected directly from the shield position to the back wall. Grouting is stopped when the advancement of the shield machine ends. The grouting process fills the gaps, thereby controlling surface settlement, stabilizing the tunnel structure, and assisting in the segment lifting process.

[0003] Based on the above findings of the inventors, the existing synchronous grouting device for shield tunnel construction has the following shortcomings. For example, during the advancement of the shield machine, the grouting device continuously injects grout into the gaps. If the grouting device is stopped before the gaps are fully filled, a certain gap will exist between the tunnel segments and the soil, leading to instability in the tunnel structure. Summary of the Invention

[0004] To address the above problems, the present invention provides a synchronous grouting device for shield tunnel construction.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a synchronous grouting device for shield tunnel construction, comprising a shield machine, a shield block, and a main body. The shield block is located at the front end of the shield machine, and the main body is positioned at the center of the shield machine. The main body includes a surrounding body, an inner cavity, grout pipes, grout outlet pipes, monitoring devices, and scrapers. The surrounding body is positioned at the center of the shield machine, and the inner cavity is located inside the surrounding body. The grout pipes are installed at the center of the inner cavity. Eight grout outlet pipes are provided and arranged around the side end faces of the grout pipes. Two monitoring devices are provided and symmetrically installed inside the surrounding body. The scrapers are welded to the outer end face of the surrounding body.

[0006] Furthermore, the monitoring device includes a frame, a movable groove, a telescopic device, and a triggering device. The frame is disposed on the end face of the surrounding body, the movable groove is disposed inside the frame, the telescopic device is installed inside the movable groove, and the triggering device is disposed at the bottom of the movable groove. The telescopic device and the triggering device are movablely coordinated.

[0007] Furthermore, the telescopic device includes a fixed base, a telescopic column, a contact block, a lower top block, and a return spring. The fixed base is welded to the top end face of the movable groove. The telescopic column passes through the inner end face of the fixed base. The contact block is connected to the top of the telescopic column. The lower top block is installed on the bottom end face of the telescopic column. The return spring is nested in the outer end face of the telescopic column. The return spring is movably engaged with the telescopic column. The lower top block is movably engaged with the triggering device.

[0008] Furthermore, the contact block includes a contact seat, a partition, and a buffer layer. The contact seat is welded to the top end face of the telescopic column. There are two partitions, which are cross-shaped on the inner end face of the contact seat. There are four buffer layers, which are installed between the partitions and the contact seat. The side end face of the buffer layer is made of rubber.

[0009] Furthermore, the buffer layer includes slots, rubber sheets, recessed grooves, and rebound plates. There are four slots, which are located on the side of the partition. The end face of the rubber sheet is connected to the partition. There are six recessed grooves, which are arranged on the top end face of the rubber sheet. The rebound plates are connected to the bottom end face of the rubber sheet in groups of two. The end face of the rubber sheet is arc-shaped. The rebound plates are made of spring steel and have strong elasticity.

[0010] Furthermore, the triggering device includes a base, a mounting slot, a pressing block, an elastic sheet, a conductive sheet, and a speaker. The base is located at the bottom of the movable slot, the mounting slot is located at the upper inner end of the base, the pressing block is engaged with the upper inner end of the mounting slot, two elastic sheets are provided and are respectively located at the bottom ends of the pressing block, the conductive sheet is located at the bottom inner end of the mounting slot, the speaker is mounted at the bottom of the base and is connected to the pressing block and the conductive sheet through a circuit, and the elastic sheet is made of spring steel.

[0011] Furthermore, the pressing block includes a pressing seat, an inner groove, a limiting groove, a buffer block, a pressing plate, a limiting rod, and a conductive plate. The pressing seat is engaged with the top of the mounting groove. The inner groove is located at the top of the inside of the pressing seat. The limiting groove is located at the bottom center of the inner groove. The buffer block is embedded in the top end face of the pressing seat. The pressing plate is located in the center of the buffer block. The limiting rod is embedded in the bottom center of the pressing plate. The conductive plate is attached to the bottom center of the pressing seat. The buffer block is made of rubber, and the conductive plate is made of copper, both having good conductivity. Beneficial effects

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention applies pressure to the telescopic device through the grout in the gap, thereby pressing the telescopic device downwards so that it presses against the triggering device. This triggers an alarm to remind workers to stop grouting. The pressure of the grout then presses against the contact block, causing the telescopic column to move downwards. This allows the lower block to contact the triggering device and trigger an alarm, reminding workers to stop grouting. It also prevents situations where the grout does not fill the gap completely.

[0013] This invention utilizes the downward movement of the pressure block to contact the conductive sheet and form a closed-loop power supply, which connects the power supply of the speaker to trigger an alarm, reminding the staff to stop grouting. Furthermore, through the cooperation of two elastic plates with the pressure block, the pressure block can be popped away from the conductive sheet when the grout pressure is low, thus stopping the alarm. Attached Figure Description

[0014] Figure 1 This is a front view schematic diagram of a synchronous grouting device for shield tunnel construction according to the present invention.

[0015] Figure 2 This is a front view schematic diagram of the main body structure of the present invention.

[0016] Figure 3 This is a front view structural diagram of the monitoring device of the present invention.

[0017] Figure 4 This is a front view structural diagram of the telescopic device of the present invention.

[0018] Figure 5 This is a top view of the contact block structure of the present invention.

[0019] Figure 6 This is a front view schematic diagram of the contact block structure of the present invention.

[0020] Figure 7 This is a front view structural schematic diagram of the triggering device of the present invention.

[0021] Figure 8 This is a front view schematic diagram of the pressing block structure of the present invention.

[0022] In the diagram: 1. Shield machine; 2. Shield block; 3. Main body; 31. Surrounding body; 32. Inner cavity; 33. Grout pipe; 34. Grout outlet pipe; 35. Monitoring device; 36. Scraper; 351. Frame; 352. Movable groove; 353. Telescopic device; 354. Triggering device; 355. Fixed seat a1; Telescopic column a2; Contact block a3; Lower top block a4; Return spring a5; Contact seat a31; Partition plate a32; Buffer layer a33; Hollow groove b1; Rubber sheet b2; Recessed groove b3; Rebound sheet b4; Base c1; Mounting groove c2; Lower pressure block c3; Elastic sheet c4; Conductive sheet c5; Speaker c6; Lower pressure seat c31; Inner groove c32; Limiting groove c33; Buffer block c34; Lower pressure plate c35; Limiting rod c36; Conductive plate c37. Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] Example 1: Please refer to Figures 1-6 The specific embodiments of the present invention are as follows: Its structure includes a tunnel boring machine 1, a shield block 2, and a main body 3. The shield block 2 is located at the front end of the tunnel boring machine 1. The main body 3 is located in the middle of the tunnel boring machine 1. The main body 3 includes a surrounding body 31, an inner cavity 32, grout pipes 33, grout outlet pipes 34, monitoring devices 35, and scrapers 36. The surrounding body 31 is located in the middle of the tunnel boring machine 1. The inner cavity 32 is located inside the surrounding body 31. The grout pipes 33 are installed in the middle of the inner cavity 32. There are eight grout outlet pipes 34, which are arranged around the side end faces of the grout pipes 33. There are two monitoring devices 35, which are symmetrically installed inside the surrounding body 31. The scrapers 36 are welded to the outer end face of the surrounding body 31.

[0025] The monitoring device 35 includes a frame 351, a movable groove 352, a telescopic device 353, and a triggering device 354. The frame 351 is located on the end face of the surrounding body 31. The movable groove 352 is located inside the frame 351. The telescopic device 353 is installed inside the movable groove 352. The triggering device 354 is located at the bottom of the movable groove 352. The telescopic device 353 and the triggering device 354 work together to facilitate the filling of the gap between the soil and the pipe segment. When the gap is filled, the pressure of the grout in the gap on the telescopic device 353 will increase, thereby pressing the telescopic device 353 downward. This causes the telescopic device 353 to press against the triggering device 354, which can trigger an alarm to remind the staff to stop grouting.

[0026] The telescopic device 353 includes a fixed base a1, a telescopic column a2, a contact block a3, a lower top block a4, and a return spring a5. The fixed base a1 is welded to the top end face of the movable groove 352. The telescopic column a2 passes through the inner end face of the fixed base a1. The contact block a3 is connected to the top of the telescopic column a2. The lower top block a4 is installed on the bottom end face of the telescopic column a2. The return spring a5 is nested in the outer end face of the telescopic column a2. The return spring a5 is movably engaged with the telescopic column a2. The lower top block a4 is movably engaged with the triggering device 354. This facilitates the use of slurry pressure to push the contact block a3, causing the telescopic column a2 to move downwards, so that the lower top block a4 can contact the triggering device 354 to trigger an alarm.

[0027] The contact block a3 includes a contact seat a31, a partition a32, and a buffer layer a33. The contact seat a31 is welded to the top end face of the telescopic column a2. There are two partitions a32, which are cross-shaped on the inner end face of the contact seat a31. There are four buffer layers a33, which are installed between the partitions a32 and the contact seat a31. The side end face of the buffer layer a33 is made of rubber, which is beneficial for the slurry to squeeze the end face of the buffer layer a33, deform the buffer layer a33, and increase the pressure of the slurry on the contact seat a31.

[0028] The buffer layer a33 includes a slot b1, a rubber sheet b2, a recessed groove b3, and a rebound piece b4. There are four slots b1, which are located on the side of the partition a32. The end face of the rubber sheet b2 is connected to the partition a32. There are six recessed grooves b3, which are arranged on the top end face of the rubber sheet b2. The rebound pieces b4 are connected to the bottom end face of the rubber sheet b2 in pairs. The end face of the rubber sheet b2 is arc-shaped. The rebound pieces b4 are made of spring steel and have strong elasticity, which helps to concentrate the slurry in the recessed groove b3, increase the pressure of the slurry on the contact seat a31, and improve the sensitivity of the movement of the telescopic column a2 when the slurry squeezes the contact seat a31.

[0029] Based on the above embodiments, the specific working principle is as follows: If the grouting device is stopped before the grout has filled the gap, a certain gap will exist between the tunnel segment and the soil, causing instability in the tunnel structure. The grout can be guided from the grout pipe 33 to the outlet grout pipe 34, allowing the shield block 2 to excavate the tunnel while the grout flows into the gap between the soil and the tunnel segment, reinforcing the soil. When the gap between the soil and the tunnel segment is filled, the pressure of the grout in the gap on the telescopic device 353 will increase, thus pressing the telescopic device 353 downward, causing it to press against the trigger device 354, triggering an alarm to remind the workers to stop grouting. Then, the pressure of the grout presses against the contact block a3, causing the telescopic column a2 to move downward, so that the lower top block a4 can contact the trigger device 354 to trigger the alarm, and the return spring a5 is in the grout When the pressure is low, the telescopic column a2 can be moved upward to reset, thereby stopping the alarm triggering. Then, the grout squeezes the end face of the buffer layer a33, deforming the buffer layer a33 and increasing the pressure of the grout on the contact seat a31. When the telescopic column a2 is subjected to the grout pressure, it can move downward quickly, improving the sensitivity of the alarm triggering. Finally, the pressure of the grout squeezes the end face of the rubber sheet b2, and the grout can be concentrated in the recessed groove b3, increasing the pressure of the grout on the contact seat a31. This can improve the sensitivity of the telescopic column a2 movement when the grout squeezes the contact seat a31, and can quickly trigger the alarm to remind the staff to stop grouting. When the grout pressure is low, the rebound plate b4 can drive the rubber sheet b2 to reset, ejecting the grout placed in the recessed groove b3 and preventing the grout from solidifying in the recessed groove b3.

[0030] Example 2: Please refer to Figures 7-8 The specific embodiments of the present invention are as follows: The triggering device 354 includes a base c1, a mounting groove c2, a pressing block c3, an elastic piece c4, a conductive piece c5, and a speaker c6. The base c1 is located at the bottom of the movable groove 352. The mounting groove c2 is located at the upper inner end of the base c1. The pressing block c3 is engaged with the upper inner end of the mounting groove c2. There are two elastic pieces c4, which are respectively located at the bottom ends of the pressing block c3. The conductive piece c5 is located at the bottom inner end of the mounting groove c2. The speaker c6 is installed at the bottom of the base c1 and is connected to the pressing block c3 and the conductive piece c5 through a circuit. The elastic piece c4 is made of spring steel, which facilitates the pressing block c3 to move downward and contact the conductive piece c5 to form a closed-loop power supply, thereby activating the power supply of the speaker c6 to trigger an alarm and remind the staff to stop grouting.

[0031] The pressing block c3 includes a pressing seat c31, an inner groove c32, a limiting groove c33, a buffer block c34, a pressing plate c35, a limiting rod c36, and a conductive plate c37. The pressing seat c31 is engaged with the top of the mounting groove c2. The inner groove c32 is located at the top of the inside of the pressing seat c31. The limiting groove c33 is located at the bottom center of the inner groove c32. The buffer block c34 is embedded in the top end face of the pressing seat c31. The pressing plate c35 is located at the center of the buffer block c34. The limiting rod c36 is embedded in the bottom center of the lower pressure plate c35, and the conductive plate c37 is attached to the bottom center of the lower pressure seat c31. The buffer block c34 is made of rubber, and the conductive plate c37 is made of copper, which has good conductivity. This allows the lower pressure plate c35 to be pressed down by the telescopic device 353, while the rubber buffer block c34 extends to provide cushioning, reducing the impact force of the telescopic device 353 on the lower pressure plate c35, and allowing the conductive plate c37 to make stable contact with the conductive sheet c5.

[0032] Based on the above embodiments, the specific working principle is as follows: The downward movement of the pressure block c3 contacts the conductive sheet c5 to form a closed-loop power supply, activating the power supply to the speaker c6 to trigger an alarm and remind workers to stop grouting. Then, through the cooperation of two elastic sheets c4 with the pressure block c3, when the grout pressure is low, the pressure block c3 can be pushed away from the conductive sheet c5 to stop the alarm. Next, the telescopic device 353, under the pressure of the grout, moves downward to press down on the pressure plate c35. Simultaneously, the telescopic device 353 is cushioned by the extension of the rubber buffer block c34, reducing the impact force on the pressure plate c35. Furthermore, the limiting groove c33 and the limiting rod c36 cooperate to ensure that the conductive plate c37 can stably contact the conductive sheet c5, thereby activating the power supply to trigger the alarm on the speaker c6, reminding workers to stop grouting.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A synchronous grouting device for shield tunnel construction, comprising a shield machine (1), a shield block (2), and a main body (3), wherein the shield block (2) is provided at the front end of the shield machine (1), and the main body (3) is located at the center of the shield machine (1), characterized in that: The main body (3) includes a surrounding body (31), an inner cavity (32), a grout pipe (33), a grout outlet pipe (34), a monitoring device (35), and a scraper (36). The surrounding body (31) is located in the middle of the tunnel boring machine (1). The inner cavity (32) is located inside the surrounding body (31). The grout pipe (33) is installed in the middle of the inner cavity (32). There are eight grout outlet pipes (34), which are arranged around the side end face of the grout pipe (33). There are two monitoring devices (35), which are symmetrically installed inside the surrounding body (31). The scraper (36) is welded to the outer end face of the surrounding body (31). The monitoring device (35) includes a frame (351), a movable groove (352), a telescopic device (353), and a triggering device (354). The frame (351) is located on the end face of the surrounding body (31). The movable groove (352) is located inside the frame (351). The telescopic device (353) is installed inside the movable groove (352). The triggering device (354) is located at the bottom of the movable groove (352). The telescopic device (353) and the triggering device (354) work together to increase the pressure of the grout on the telescopic device (353) when the gap between the soil and the pipe segment is filled, thereby pressing the telescopic device (353) down so that the telescopic device (353) presses against the triggering device (354), which can trigger an alarm to remind the staff to stop grouting. The telescopic device (353) includes a fixed base (a1), a telescopic column (a2), a contact block (a3), a lower top block (a4), and a return spring (a5). The fixed base (a1) is welded to the top end face of the movable groove (352). The telescopic column (a2) passes through the inner end face of the fixed base (a1). The contact block (a3) ​​is connected to the top of the telescopic column (a2). The lower top block (a4) is installed on the bottom end face of the telescopic column (a2). The return spring (a5) is nested in the outer end face of the telescopic column (a2). The return spring (a5) is movably engaged with the telescopic column (a2). The lower top block (a4) is movably engaged with the triggering device (354). This facilitates the contact block (a3) ​​to be pushed down by the pressure of the slurry, causing the telescopic column (a2) to move downward, so that the lower top block (a4) can contact the triggering device (354) to trigger an alarm. The contact block (a3) ​​includes a contact seat (a31), a partition (a32), and a buffer layer (a33). The contact seat (a31) is welded to the top end face of the telescopic column (a2). There are two partitions (a32) that cross each other on the inner end face of the contact seat (a31). There are four buffer layers (a33) that are installed between the partitions (a32) and the contact seat (a31).

2. The synchronous grouting device for shield tunnel construction according to claim 1, characterized in that: The buffer layer (a33) includes a slot (b1), a rubber sheet (b2), a recessed groove (b3), and a rebound piece (b4). There are four slots (b1) and they are located on the side of the partition (a32). The end face of the rubber sheet (b2) is connected to the partition (a32). There are six recessed grooves (b3) and they are arranged on the top end face of the rubber sheet (b2). The rebound pieces (b4) are connected to the bottom end face of the rubber sheet (b2) in pairs.

3. The synchronous grouting device for shield tunnel construction according to claim 1, characterized in that: The triggering device (354) includes a base (c1), a mounting groove (c2), a pressing block (c3), an elastic piece (c4), a conductive piece (c5), and a speaker (c6). The base (c1) is located at the bottom of the movable groove (352). The mounting groove (c2) is located at the upper inside of the base (c1). The pressing block (c3) is engaged with the upper inside of the mounting groove (c2). There are two elastic pieces (c4), which are respectively located at the bottom ends of the pressing block (c3). The conductive piece (c5) is located at the bottom inside of the mounting groove (c2). The speaker (c6) is installed at the bottom of the base (c1) and is connected to the pressing block (c3) and the conductive piece (c5) through a circuit.

4. The synchronous grouting device for shield tunnel construction according to claim 3, characterized in that: The pressing block (c3) includes a pressing seat (c31), an inner groove (c32), a limiting groove (c33), a buffer block (c34), a pressing plate (c35), a limiting rod (c36), and a conductive plate (c37). The pressing seat (c31) is engaged with the top of the mounting groove (c2). The inner groove (c32) is located at the top of the inside of the pressing seat (c31). The limiting groove (c33) is located at the bottom center of the inner groove (c32). The buffer block (c34) is embedded in the top end face of the pressing seat (c31). The pressing plate (c35) is located in the center of the buffer block (c34). The limiting rod (c36) is embedded in the bottom center of the pressing plate (c35). The conductive plate (c37) is attached to the bottom center of the pressing seat (c31).

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