Device for detecting strength of outside-ring micro-disturbance grouting reinforcement layer of water-rich sand layer shield tunnel

Abstract

The utility model discloses a water-rich sand layer shield tunnel outside-ring micro-disturbance grouting reinforcement layer strength detection device, and relates to the field of concrete strength detection, the water-rich sand layer shield tunnel outside-ring micro-disturbance grouting reinforcement layer strength detection device comprises at least two detection mechanisms; the device further comprises a connecting body, and the multiple detection mechanisms are all installed on the connecting body. The detection mechanism comprises a detection assembly and a connection assembly, the detection assembly can stretch out and draw back, the detection assembly is used for penetrating through the duct piece to extend to the outer side so as to detect the reinforced soil body, and the connection assembly is used for positioning the detection mechanism on the duct piece so as to provide reverse acting force needed by other detection mechanisms during detection; the method has the effect.

Description

Technical Field

[0001] The present invention relates to the field of concrete strength testing, in particular to a device for testing the strength of a micro-disturbance grouting reinforcement layer outside a shield tunnel in a water-rich sand layer. Background Art

[0002] To effectively control ground settlement during operation, shield tunneling in water-rich sand layers currently employs grouting reinforcement in weak soil layers to enhance their engineering properties and prevent uneven tunnel settlement. Grouting is primarily performed in the soil layer outside the segments, integrating the concrete slurry and soil to ensure soil stability. However, testing is required to assess the strength of the reinforced soil after grouting.

[0003] Currently, the main method for testing the strength of reinforced soil after grouting is to drill a core sample from the ground near the tunnel perimeter after the reinforcement is completed. This core sample is then removed for indoor testing to verify the effectiveness of the grouting reinforcement. However, due to the high degree of dispersion in the test results of the core sample, this testing method is difficult to provide a basis for evaluating the effectiveness of grouting reinforcement in the tunnel. Utility Model Content

[0004] In order to facilitate the detection of the strength of the reinforced soil after grouting, the present application provides a strength detection device for the micro-disturbance grouting reinforcement layer outside the ring of a water-rich sand layer shield tunnel.

[0005] This application provides a device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel, which adopts the following technical solutions:

[0006] A device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel includes a detection mechanism, at least two of which are provided; and a connector, on which multiple detection mechanisms are mounted; the detection mechanism includes a detection component and a connection component, the detection component is retractable, and the detection component is used to extend through the pipe segment to the outside to detect the reinforced soil, and the connection component is used to position the detection mechanism on the pipe segment to provide the reverse force required for detection by other detection mechanisms.

[0007] By adopting the above technical solution, when in use, one of the detection components is passed through the pipe segment to detect the reinforced soil, and the other detection component is positioned on the pipe segment through the connecting component. During detection, the detection component is extended and retracted to record the change in the depth of the detection component inserted into the reinforced soil, and the magnitude of the applied detection force is recorded to judge the strength of the reinforced soil. The device detects through one of the detection components, and the other detection component provides a reverse force, which facilitates the strength detection of the reinforced soil. Since the two detection components have the same structure, the detection components can switch with each other during detection and positioning, thereby improving the efficiency of the strength detection of the reinforced soil.

[0008] Optionally, the detection assembly includes a fixed cylinder and a detection rod, the fixed cylinder is installed on the connecting body, one end of the detection rod is inserted into the fixed cylinder, and the other end of the detection rod is used to extend through the pipe segment to the outside to detect the reinforced soil, and the fixed cylinder is provided with an air pump for extracting or injecting air into the fixed cylinder to move the detection rod.

[0009] By adopting the above technical solution, during testing, the testing rod is first passed through the pipe segment to test the reinforced soil, and then the fixed cylinder is injected with air using an air pump to move the testing rod, thereby applying force to the reinforced soil. The magnitude of the force applied by the testing rod on the soil can be obtained by measuring the air pressure in the fixed cylinder, and the elongation length of the testing rod is recorded at the same time. The strength of the reinforced soil can be judged by combining these two. The testing component has a simple structure and is easy to operate.

[0010] Optionally, the connecting component includes a card block, a clearance groove for the card block to slide is provided on the outer wall of the detection rod, a through hole is provided on the pipe sheet for the detection rod to pass through, and an annular groove for the card block to be inserted is provided on the inner wall of the through hole, and the card block can slide and be stuck in the annular groove and the clearance groove at the same time; and it also includes a driving component for driving the card block to slide.

[0011] By adopting the above technical solution, when positioning the detection rod, the detection rod is inserted into the through-hole, and then the driving assembly is used to drive the slider to move, so that the slider is stuck in the annular groove and the give way groove at the same time, thereby limiting the movement of the detection rod and providing the reverse force required for the detection of other detection rods; the connecting assembly has a simple structure and is easy to operate; it is also worth noting that the through-hole can be a grouting hole during grouting.

[0012] Optionally, the detection components are provided in two, the driving component includes a sleeve and a piston arranged in the sleeve and able to slide in the sleeve, the piston is connected to a screw, the end of the screw away from the piston passes through the sleeve and extends to the outside of the sleeve, and the screw and the sleeve are threadedly connected; an air channel connected to the give way groove is opened inside the detection rod, the air channel is connected to the sleeve through a hose, and the air channels on the two detection rods are respectively connected to the sleeve on both sides of the piston.

[0013] By adopting the above technical solution, when the slider is driven to move, the screw is rotated to drive the piston to move, and the gas in one of the give way grooves is pumped into the sleeve through the airway and the hose, and the slider is retracted into the give way groove, so that the detection rod can be used for detection, and the other give way groove is injected with gas by the movement of the piston, so that the slider partially moves out of the give way groove and is stuck in the annular groove, and the detection rod is used to provide a reverse force; the driving component has a simple structure and is easy to operate, and a set of structures can be used to simultaneously realize the reverse movement of the two sliders of the two detection rods to realize different functions respectively, and it has strong practicality.

[0014] Optionally, the connecting body includes a hand-held rod and two adjustment rods, the two adjustment rods are respectively slidably connected to the two ends of the hand-held rod along the length direction of the hand-held rod, and the hand-held rod is provided with a positioning member for locating the position of the adjustment rod; the detection mechanism is arranged on the adjustment rod.

[0015] By adopting the above technical solution, the distance between the two adjusting rods can be adjusted, and then the distance between the two detection components can be adjusted to adapt to different perforation hole spacings on the pipe segment.

[0016] Optionally, the positioning member is a tightening screw, which is threadedly connected to the hand-held rod, and the tightening screw is rotated to tighten the outer wall of the adjusting rod.

[0017] By adopting the above technical solution, when locating the position of the adjusting rod, the adjusting rod can be positioned by rotating the tightening screw.

[0018] In summary, this application has the following beneficial technical effects:

[0019] 1. This application facilitates strength testing of reinforced soil by using one detection component for testing and the other detection component for providing a counteracting force. Furthermore, since the two detection components have the same structure, they can be switched between each other during testing and positioning, improving the efficiency of strength testing of reinforced soil.

[0020] 2. This application utilizes a set of structures to simultaneously realize the reverse movement of the two sliders of the two detection rods to respectively realize different functions, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the overall structure of a device for detecting the strength of a micro-disturbance grouting reinforcement layer outside a water-rich sand layer shield tunnel disclosed in this application, applied to a segment;

[0022] Figure 2 yes Figure 1 sectional view of .

[0023] Description of reference numerals:

[0024] 1. Connector; 2. Detection mechanism; 3. Hand-held rod; 4. Adjustment rod; 5. Tightening screw; 6. Fixing tube; 7. Detection rod; 8. Perforation; 9. Air pump; 10. Block; 11. Gap; 12. Spring; 13. Ring groove; 14. Piston; 15. Sleeve; 16. Screw; 17. Handle; 18. Hose; 19. Airway; 20. Segment. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-2 This application is described in further detail.

[0026] The present application discloses a device for detecting the strength of a micro-disturbance grouting reinforcement layer outside the ring of a water-rich sand layer shield tunnel.

[0027] Reference Figure 1 and Figure 2 A device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel includes a connector 1 and multiple detection mechanisms 2. The multiple detection mechanisms 2 are all installed on the connector 1. In this embodiment, two detection mechanisms 2 are used for illustration.

[0028] The connector 1 includes a hand-held rod 3 and two adjusting rods 4. The two adjusting rods 4 are respectively slidably inserted at both ends of the hand-held rod 3 along the length direction of the hand-held rod 3. The hand-held rod 3 is provided with a positioning piece for positioning the adjusting rod 4.

[0029] The positioning member is a tightening screw 5 , which is threadedly connected to the hand-held rod 3 , and the tightening screw 5 is rotated to tighten against the outer wall of the adjusting rod 4 .

[0030] In another embodiment, the positioning member may also be a latch.

[0031] In this embodiment, the detection mechanism 2 includes a detection component and a connection component. The detection component is used to extend through the pipe segment 20 to the outside to detect the reinforced soil. The connection component is used to position the detection mechanism 2 on the pipe segment 20 to provide the reverse force required for other detection mechanisms 2 to detect.

[0032] The detection assembly includes a fixed tube 6 and a detection rod 7. The fixed tube 6 is fixedly connected to the adjusting rod 4. One end of the detection rod 7 is inserted into the fixed tube 6. The other end of the detection rod 7 is used to extend through the pipe segment 20 to the outside to detect the reinforced soil. The outer wall of the detection rod 7 and the inner wall of the fixed tube 6 are sealed. A through-hole 8 for the detection rod 7 to pass through is provided on the pipe segment 20 (the through-hole 8 can utilize the grouting hole opened on the pipe segment 20 during the previous grouting). An air pump 9 is fixedly connected to the fixed tube 6 for vacuuming or injecting air into the fixed tube 6 to move the detection rod 7 (in this embodiment, the air pump 9 adopts a small air pump 9, and a battery can be installed on the handheld rod 3. The power of the air pump 9 comes from the battery).

[0033] In this embodiment, a barometer may be installed on the fixing tube 6 to determine the air pressure in the fixing tube 6 , thereby determining the magnitude of the force applied by the detection rod 7 .

[0034] The connecting component includes a card block 10, and a clearance groove 11 for the card block 10 to slide is provided on the outer wall of the end of the detection rod 7 away from the fixed cylinder 6. A through hole 8 for the detection rod 7 to pass through is provided on the pipe segment 20, and an annular groove 13 for the card block 10 to be clamped into is provided on the inner wall of the through hole 8 (the setting of the annular groove 13 is so that the card block 10 can be clamped in the annular groove 13 at any position on the same plane). The card block 10 can be clamped in the annular groove 13 and the clearance groove 11 at the same time when it slides; and it also includes a driving component for driving the card block 10 to slide.

[0035] The drive assembly includes a sleeve 15 and a piston 14 arranged in the sleeve 15 and able to slide in the sleeve 15. The outer wall of the piston 14 and the inner wall of the sleeve 15 are sealed. A screw 16 is rotatably connected to the piston 14. The end of the screw 16 away from the piston 14 passes through the sleeve 15 and extends to the outside of the sleeve 15 and is fixedly connected to a handle 17, and the screw 16 and the sleeve 15 are threadedly connected; an air duct 19 connected to the give way groove 11 is opened inside the detection rod 7, and the air duct 19 is connected to the sleeve 15 through a hose 18, and the air ducts 19 on the two detection rods 7 are respectively connected to the sleeve 15 and the two sides of the piston 14.

[0036] In order to prevent the block 10 from escaping from the clearance groove 11 , a spring 12 is fixedly connected in the clearance groove 11 . The length direction of the spring 12 is arranged along the sliding direction of the block 10 , and the spring 12 and the block 10 are fixedly connected.

[0037] In another embodiment, the driving assembly may also adopt a pull rod, that is, the pull rod is used to pull the clamping block 10 to slide.

[0038] The implementation principle of the strength detection device for the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel disclosed in the present application is: when in use, adjust the distance between the two detection mechanisms 2, then insert the detection rod 7 into the through hole 8, and then rotate the screw 16 to drive the piston 14 to move, so that the slider on one of the detection rods 7 is retracted into the makeshift groove 11, and the detection rod 7 can be used for detection, and the slider on the other detection rod 7 is partially moved out of the makeshift groove 11 and stuck in the annular groove 13, then the detection rod 7 is used to provide a reverse force, and then use the air pump 9 to inject air into the fixed cylinder 6 used for detection to move the detection rod 7, and judge the strength of the reinforced soil by judging and recording the magnitude of the force applied by the movement of the detection rod 7 and the change in the depth of insertion into the reinforced soil.

[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A device for detecting the strength of a micro-disturbance grouting reinforcement layer outside a water-rich sand layer shield tunnel, comprising a detection mechanism (2), characterized in that: The detection mechanisms (2) are provided in at least two forms; a connecting body (1) is also included, and a plurality of detection mechanisms (2) are mounted on the connecting body (1); the detection mechanism (2) comprises a detection component and a connecting component, the detection component being retractable and configured to extend through the pipe segment (20) to the outside to detect the reinforced soil, and the connecting component being configured to position the detection mechanism (2) on the pipe segment (20) to provide the reverse force required by other detection mechanisms (2) during detection.

2. The device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel according to claim 1 is characterized by: The detection assembly comprises a fixed cylinder (6) and a detection rod (7); the fixed cylinder (6) is mounted on the connecting body (1); one end of the detection rod (7) is inserted into the fixed cylinder (6); the other end of the detection rod (7) is used to pass through the pipe segment (20) and extend to the outside to detect the reinforced soil; and an air pump (9) is provided on the fixed cylinder (6) for pumping air or injecting air into the fixed cylinder (6) to move the detection rod (7).

3. The device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel according to claim 2 is characterized by: The connecting assembly comprises a clamping block (10), a clearance groove (11) for the clamping block (10) to slide is provided on the outer wall of the detection rod (7), a through hole (8) for the detection rod (7) to pass through is provided on the pipe sheet (20), an annular groove (13) for the clamping block (10) to be clamped is provided on the inner wall of the through hole (8), and the clamping block (10) can be clamped in the annular groove (13) and the clearance groove (11) at the same time when sliding; and a driving assembly for driving the clamping block (10) to slide is also included.

4. The device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a shield tunnel in a water-rich sand layer according to claim 3 is characterized by: The detection components are provided in pairs, and the driving component comprises a sleeve (15) and a piston (14) which is arranged in the sleeve (15) and can slide in the sleeve (15); the piston (14) is connected with a screw rod (16); one end of the screw rod (16) away from the piston (14) passes through the sleeve (15) and extends to the outside of the sleeve (15), and the screw rod (16) and the sleeve (15) are threadedly connected; an air passage (19) which is connected to the give way groove (11) is provided inside the detection rod (7); the air passage (19) is connected to the sleeve (15) through a hose (18), and the air passages (19) on the two detection rods (7) are respectively connected to the sleeve (15) and the two sides of the piston (14).

5. The device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a water-rich sand layer shield tunnel according to claim 1 is characterized in that: The connecting body (1) comprises a hand-held rod (3) and two adjusting rods (4), the two adjusting rods (4) being respectively connected to the two ends of the hand-held rod (3) by sliding along the length direction of the hand-held rod (3), and a positioning member for locating the position of the adjusting rod (4) is provided on the hand-held rod (3); and the detection mechanism (2) is arranged on the adjusting rod (4).

6. The device for detecting the strength of the outer ring micro-disturbance grouting reinforcement layer of a shield tunnel in a water-rich sand layer according to claim 5 is characterized by: The positioning member is a tightening screw (5), which is threadedly connected to the hand-held rod (3). The tightening screw (5) rotates to tighten against the outer wall of the adjustment rod (4).

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