Settlement measuring device applied to subway construction

Abstract

The utility model discloses a settlement measuring device applied to subway construction, which relates to the technical field of engineering surveying and comprises a measuring cylinder and a fixing piece, a first measuring rod is arranged in the measuring cylinder, a supporting plate is arranged at the lower end of the first measuring rod, and a plurality of first blind holes are formed in the bottom of the supporting plate. The first blind holes are internally provided with second measuring rods of which the outer diameters are the same as the inner diameters of the first blind holes. A second blind hole communicated with the first blind hole is further formed in the upper end of the first measuring rod, a third measuring rod with the outer diameter identical to the inner diameter of the second blind hole is arranged in the second blind hole, the third measuring rod penetrates to the top of the measuring cylinder, and first scale marks distributed in the axial direction of the third measuring rod are arranged on the outer surface of the third measuring rod. When a certain part below the supporting plate is settled, the second measuring rod can descend along with the part, so that the third measuring rod is forced to descend synchronously, local settlement of the ground can be judged quickly, and remedial measures can be taken in time.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering measurement, in particular to a settlement measurement device used in subway construction. Background Art

[0002] Shield tunneling is widely used in subway construction, and is particularly common in my country's subway tunnel projects. Shield tunneling leverages its technical advantages to ensure overall construction quality and efficiency. However, due to the inherent nature of shield tunneling, ground subsidence is a common problem during construction, necessitating regular ground measurements.

[0003] Existing settlement measurement devices, such as the Chinese utility model patent with publication number CN218329904U, disclose a subway section tunnel settlement observation device, comprising a first fixed plate fixed to the tunnel wall, a second fixed plate fixed to the roadbed, an observation tube arranged above the second fixed plate, a guide rod vertically arranged in the observation tube, a horizontal scale line arranged on the front end surface of the observation tube, and a strip hole arranged in the center of the front end of the observation tube in the vertical direction; an L-shaped connecting rod is fixedly connected to the first fixed plate, the lower end of the L-shaped connecting rod extends into the observation tube, and a slider is fixed to the lower end of the L-shaped connecting rod; the slider is mounted on the guide rod and can slide freely up and down, and a horizontal pointer is connected to the slider after the front end center protrudes from the strip hole, and the horizontal pointer indicates on the horizontal scale line. This existing technology fixes the observation pointer to the tunnel wall, so that if the ground as a whole settles, it will not affect the observation results, thereby greatly improving the accuracy of the observation data.

[0004] However, since the settlement observation device is in contact with the ground through the second fixed plate, when local settlement occurs below the second fixed plate, the second fixed plate cannot be moved down in time, resulting in the settlement observation device being unable to measure the ground settlement in the first time, thereby missing the best remedial measures. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and aims to provide a settlement measuring device for use in subway construction. When a certain part below the support plate settles, the second measuring rod can follow suit and thus force the third measuring rod to descend synchronously, thereby being able to quickly determine that the ground has settled locally so that remedial measures can be taken in a timely manner.

[0006] The utility model is achieved through the following technical solutions:

[0007] A settlement measurement device for use in subway construction includes a measuring cylinder and a fixing member for fixing the measuring cylinder in a tunnel. A first measuring rod is disposed in the measuring cylinder. A support plate is disposed at the lower end of the first measuring rod. A plurality of first blind holes are disposed at the bottom of the support plate. Second measuring rods having an outer diameter identical to the inner diameter of the first blind holes are disposed in each of the first blind holes.

[0008] The upper end of the first measuring rod is also provided with a second blind hole connected to the first blind hole, and the second blind hole is provided with a third measuring rod with an outer diameter the same as the inner diameter of the second blind hole, and the third measuring rod passes through the top of the measuring cylinder, and the outer surface of the third measuring rod is provided with a first scale line distributed along the axial direction of the third measuring rod.

[0009] Furthermore, the fixing member includes a horizontal plate and an L-shaped fixing plate, the fixing plate is fixed to the tunnel by bolts, a threaded rod passing through the horizontal plate is provided on the fixing plate, and a limiting nut is provided on the threaded rod;

[0010] The transverse plate is provided with a mounting hole, and the measuring cylinder is located in the mounting hole.

[0011] Furthermore, a sleeve is provided in the mounting hole, a rotating rod is provided on the side wall of the sleeve, the rotating rod passes through the horizontal plate, and a fixing nut is provided on the rotating rod, and the fixing nut is located on the outside of the horizontal plate;

[0012] The measuring cylinder is located in the sleeve. Two fixing disks are provided on the measuring cylinder. The fixing disks are connected to the measuring cylinder via threads.

[0013] Furthermore, a first elastic member is provided in each of the first blind holes of the support plate. One end of the first elastic member is fixed in the first blind hole, and the other end is connected to the second measuring rod.

[0014] Furthermore, the upper end of the measuring cylinder is a closed structure, and an adjusting cylinder is further provided on the closed end of the measuring cylinder, and the adjusting cylinder is connected to the measuring cylinder through a thread;

[0015] A push plate is further provided at the upper end of the first measuring rod, and the push plate is sleeved on the third measuring rod. An adjustment plate is further provided in the measuring cylinder, and the adjustment plate is located above the push plate, and the adjustment plate is also sleeved on the third measuring rod.

[0016] A second elastic member is further provided between the adjusting plate and the pushing plate.

[0017] Furthermore, a strip-shaped opening and a second scale line are provided on the side wall of the measuring cylinder, and the second scale line is distributed on one side of the strip-shaped opening along the axial direction of the measuring cylinder;

[0018] A connecting block connected to the first measuring rod is provided in the strip-shaped opening, and a pointer pointing to the second scale line is provided on the connecting block.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] According to the utility model, when a certain local position below the support plate sinks, the second measuring rod above the position can follow the sinking, and the second measuring rod in the first blind hole generates negative pressure when sinking, which will absorb part of the air in the second blind hole, so that the third measuring rod in the second blind hole also sinks synchronously. Therefore, by observing the first scale line on the third measuring rod, it can be judged whether the ground has sunk, so that construction workers can make up for the sinking area in time to avoid serious economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of another state of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure inside the measuring tube of the utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the support plate of the utility model;

[0026] Figure 5 This is a structural diagram of the fixing member of the utility model.

[0027] Markings and corresponding parts names in the accompanying drawings:

[0028] 1. Support plate; 2. Measuring tube; 3. Strip mouth; 4. Fixed plate; 5. Sleeve; 6. Fixing part; 7. Third measuring rod; 8. Adjusting tube; 9. Pointer; 10. Second scale mark; 11. Adjusting plate; 12. Second elastic part; 13. Push plate; 14. First measuring rod; 15. Second blind hole; 16. Second measuring rod; 18. First elastic part; 19. Conduit; 20. Fixed plate; 21. Horizontal plate; 22. Threaded rod; 23. Limit nut; 24. Rotating rod; 25. Fixing nut. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The schematic implementation methods of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0030] like Figures 1 to 5 As shown, the utility model includes a measuring cylinder 2 and a fixing part 6 for fixing the measuring cylinder 2 in the tunnel, a first measuring rod 14 is provided in the measuring cylinder 2, a support plate 1 is provided at the lower end of the first measuring rod 14, a plurality of first blind holes are provided at the bottom of the support plate 1, and a second measuring rod 16 with an outer diameter identical to the inner diameter of the first blind hole is provided in each of the first blind holes; a second blind hole 15 communicating with the first blind hole is further provided at the upper end of the first measuring rod 14, a third measuring rod 7 with an outer diameter identical to the inner diameter of the second blind hole 15 is provided in the second blind hole 15, and the third measuring rod 7 passes through the top of the measuring cylinder 2, and a first scale line distributed along the axial direction of the third measuring rod 7 is provided on the outer surface of the third measuring rod 7.

[0031] The settlement measuring device in the prior art usually utilizes a support plate 1 to contact the ground to be measured. When the ground settles, the support plate 1 is displaced to drive the first measuring rod 14 in the measuring cylinder 2 to descend synchronously. By observing the relative position of the first measuring rod 14 in the measuring cylinder 2, it is determined whether the ground has settled. However, in actual application, when the ground at the bottom of the support plate 1 partially settles, especially the ground at the central position of the bottom of the support plate 1 settles, while the ground near the edges of the support plate 1 does not settle, the support plate 1 does not settle. It is easy to fall, which makes the settlement measuring device unable to measure the ground settlement in the first time, and thus misses the best compensatory measures. For this reason, the technical solution is provided with a plurality of first blind holes at the bottom of the existing support plate 1, and a second measuring rod 16 is provided in the first blind hole. The outer diameter of the second measuring rod 16 is consistent with the inner diameter of the first blind hole. At the same time, a second blind hole 15 is further provided at the upper end of the first measuring rod 14, and a third measuring rod 7 is provided in the second blind hole 15. The second blind hole 15 is connected to the first blind hole through a conduit 19. In the initial state, the second blind hole 15 is provided on the support plate 1. The second measuring rod 16 at the bottom of the support plate 1 extends out of the first blind hole. When the support plate 1 is placed on the ground to be measured, each second measuring rod 16 is pressed back into the first blind hole under the action of the support plate 1. When the second measuring rod 16 is retracted into the first blind hole, the second measuring rod 16 will squeeze the air in the first blind hole, forcing the air in the first blind hole to enter the second blind hole 15 through the conduit 19. The air entering the second blind hole 15 will push the third measuring rod 7 to move upward in the measuring cylinder 2. The first scale set on the outer wall of the third measuring rod 7 is used to measure the ground. The line records the initial position of the third measuring rod 7; once a certain position of the ground below the support plate 1 sinks, the second measuring rod 16 will move downward under the action of its own gravity. When the second measuring rod 16 moves downward, part of the air in the second blind hole 15 flows back into the first blind hole where the second measuring rod 16 is located, thereby forcing the third measuring rod 7 to descend in the measuring tube 2. By observing the first scale line on the third measuring rod 7, it is possible to quickly determine whether the local ground below the support plate 1 has sunk, and then make up for it in the first time.

[0032] The fixing member 6 includes a transverse plate 21 and an L-shaped fixing plate 20. The fixing plate 20 is fixed to the tunnel by bolts. The fixing plate 20 is provided with a threaded rod 22 that passes through the transverse plate 21. The threaded rod 22 is provided with a limit nut 23. The transverse plate 21 is provided with a mounting hole, and the measuring cylinder 2 is located in the mounting hole.

[0033] The function of the provided fixing part 6 is to fix the measuring tube 2 in the present technical solution on the side wall of the subway construction tunnel, so as to ensure that when the ground settles, the provided first measuring rod 14 and the third measuring rod 7 can be displaced relative to the measuring tube 2, so as to facilitate the judgment of whether the ground has settled. At the same time, in order to be able to adjust the distance between the measuring tube 2 and the inner wall of the tunnel according to actual construction requirements, the provided fixing part 6 includes a transverse plate 21 and a fixing plate 20, wherein the fixing plate 20 is threadedly connected to the embedded tube embedded on the inner wall of the tunnel by bolts, so that the fixing plate 20 is quickly fixed on the inner wall of the tunnel, and then the position of the transverse plate 21 on the threaded rod 22 is adjusted and fixed by the limit nut 23, thereby realizing the adjustment of the position of the transverse plate 21 on the threaded rod 22 to meet the use requirements under different working conditions.

[0034] A sleeve 5 is also provided in the mounting hole, and a rotating rod 24 is provided on the side wall of the sleeve 5. The rotating rod 24 passes through the horizontal plate 21, and a fixing nut 25 is also provided on the rotating rod 24. The fixing nut 25 is located on the outside of the horizontal plate 21; the measuring cylinder 2 is located in the sleeve 5, and two fixing plates 4 are also provided on the measuring cylinder 2, and the fixing plates 4 are connected to the measuring cylinder 2 through threads.

[0035] In this embodiment, in order to ensure that the measuring tube 2 can be stably fixed in the horizontal plate 21, a sleeve 5 is provided in the mounting hole of the horizontal plate 21. Considering that the inner wall of the tunnel may be in an inclined state in actual application, in order to ensure that the measuring tube 2 can be in a vertical state, a rotating rod 24 is provided on both sides of the sleeve 5. The rotating rod 24 passes through the horizontal plate 21. The rotating rod 24 and the threaded rod 22 are not in the same plane, ensuring that the rotating rod 24 can rotate in the horizontal plate 21, and the outer diameter of the sleeve 5 is smaller than the inner diameter of the through hole, ensuring that the sleeve 5 can rotate in the mounting hole of the horizontal plate 21.

[0036] In this way, when the fixing part 6 of the device needs to be installed on the inclined surface of the tunnel, first fix the fixing plate 20 on the inclined surface of the tunnel, and then install the measuring tube 2 in the sleeve 5 of the horizontal plate 21. After selecting a suitable height, use the fixing plate 4 to fix the measuring tube 2 in the sleeve 5, and then adjust the position of the horizontal plate 21 on the threaded rod 22, and use the limit nut 23 to fix the horizontal plate 21 on the threaded rod 22. Finally, adjust the position of the sleeve 5 in the horizontal plate 21 by the set rotating rod 24. A spirit level can be placed on the top of the third measuring rod 7 to ensure that the measuring tube 2 in the sleeve 5 is in a vertical state, and tighten the fixing nut 25 to stabilize the measuring tube 2 in the sleeve 5 in a vertical state.

[0037] A first elastic member 18 is further provided in the first blind hole of the support plate 1 . One end of the first elastic member 18 is fixed in the first blind hole, and the other end is connected to the second measuring rod 16 .

[0038] In this embodiment, when a certain part of the ground below the support plate 1 sinks, in order to ensure that the second measuring rod 16 can be quickly extended from the first blind hole of the support plate 1, so that a negative pressure is generated in the first blind hole for absorbing the air in the second blind hole 15, a first elastic member 18 is also provided in the first blind hole. The first elastic member 18 is a spring. When the lower end of the second measuring rod 16 is completely retracted into the first blind hole, so that the lower end of the second measuring rod 16 is flush with the bottom of the support plate 1, the first elastic member 18 is in a compressed state at this time. Therefore, once a certain part of the ground below the support plate 1 sinks, the second measuring rod 16 can be pushed to be quickly extended from the first blind hole under the action of the first elastic member 18. When the second measuring rod 16 moves downward, a negative pressure is generated in the first blind hole, and part of the air in the second blind hole 15 is sucked into the first blind hole, so that the third measuring rod 7 located in the second blind hole 15 can descend, thereby timely judging that the ground has sunk.

[0039] In another embodiment, a third elastic member is further provided in the second blind hole 15 , one end of the third elastic member is connected to the inner wall of the second blind hole 15 , and the other end is connected to the bottom of the third measuring rod 7 .

[0040] When the second measuring rod 16 retreats in the first blind hole and squeezes the air into the second blind hole 15, forcing the third measuring rod 7 in the second blind hole 15 to move upward, the third elastic member is in a stretched state. In this way, when the second measuring rod 16 located in the first blind hole extends downward, the third measuring rod 7 can be pulled to move downward in the second blind hole 15 under the action of the third elastic member.

[0041] In another embodiment, sealing rings are provided on the third measuring rod 7 and the second measuring rod 16. The provided sealing rings can ensure the air tightness between the third measuring rod 7 and the second blind hole 15, and the air tightness between the second measuring rod 16 and the first blind hole.

[0042] The upper end of the measuring cylinder 2 is a closed structure, and an adjusting cylinder 8 is also provided on the closed end of the measuring cylinder 2, and the adjusting cylinder 8 is connected to the measuring cylinder 2 by a thread; the upper end of the first measuring rod 14 is also provided with a push plate 13, and the push plate 13 is sleeved on the third measuring rod 7. An adjusting plate 11 is also provided in the measuring cylinder 2, and the adjusting plate 11 is located above the push plate 13, and the adjusting plate 11 is also sleeved on the third measuring rod 7; a second elastic member 12 is also provided between the adjusting plate 11 and the push plate 13.

[0043] In this embodiment, in order to ensure that the support plate 1 can be pressed tightly against the ground to be measured, so that when the ground under the support plate 1 sinks, the support plate 1 can be quickly displaced downward, an adjustment plate 11, a second elastic member 12 and a push plate 13 are provided in the measuring cylinder 2. By rotating the adjustment cylinder 8, the adjustment cylinder 8 moves downward at the upper end of the measuring cylinder 2, generating a thrust on the adjustment plate 11, forcing the elastic force generated by the second elastic member 12 to push the first measuring rod 14 to press the support plate 1 tightly against the ground.

[0044] The side wall of the measuring cylinder 2 is also provided with a strip opening 3 and a second scale line 10, and the second scale line 10 is distributed axially along the measuring cylinder 2 on one side of the strip opening 3; a connecting block connected to the first measuring rod 14 is provided in the strip opening 3, and a pointer 9 pointing to the second scale line 10 is provided on the connecting block.

[0045] In this embodiment, in order to facilitate the observation of whether the first measuring rod 14 is lowered, thereby judging whether the ground below the support plate 1 has settled as a whole, a second scale line 10 and a pointer 9 are further provided on the surface of the measuring tube 2. When the support plate 1 as a whole is displaced downward, the first measuring rod 14 drives the pointer 9 to move downward, so that the change in the position of the pointer 9 on the second scale line 10 can timely judge whether the ground below the support plate 1 has settled as a whole.

[0046] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A settlement measuring device for subway construction, comprising a measuring cylinder (2) and a fixing member (6) for fixing the measuring cylinder (2) in a tunnel, wherein a first measuring rod (14) is provided in the measuring cylinder (2), and a support plate (1) is provided at the lower end of the first measuring rod (14), characterized in that: The bottom of the support plate (1) is provided with a plurality of first blind holes, each of the first blind holes being provided with a second measuring rod (16) having an outer diameter identical to the inner diameter of the first blind hole; The upper end of the first measuring rod (14) is further provided with a second blind hole (15) communicating with the first blind hole, and the second blind hole (15) is provided with a third measuring rod (7) having an outer diameter identical to an inner diameter of the second blind hole (15), and the third measuring rod (7) extends through the top of the measuring cylinder (2), and the outer surface of the third measuring rod (7) is provided with a first scale line distributed along the axial direction of the third measuring rod (7).

2. The settlement measurement device for subway construction according to claim 1, characterized in that: The fixing member (6) includes a transverse plate (21) and an L-shaped fixing plate (20), wherein the fixing plate (20) is fixed to the tunnel by bolts, and a threaded rod (22) penetrating the transverse plate (21) is provided on the fixing plate (20), and a limiting nut (23) is provided on the threaded rod (22); The transverse plate (21) is provided with a mounting hole, and the measuring cylinder (2) is located in the mounting hole.

3. The settlement measurement device for subway construction according to claim 2, characterized in that: A sleeve (5) is further provided in the mounting hole, a rotating rod (24) is provided on the side wall of the sleeve (5), the rotating rod (24) passes through the horizontal plate (21), and a fixing nut (25) is further provided on the rotating rod (24), and the fixing nut (25) is located on the outside of the horizontal plate (21); The measuring cylinder (2) is located in the sleeve (5), and two fixing disks (4) are further provided on the measuring cylinder (2). The fixing disks (4) are connected to the measuring cylinder (2) via threads.

4. The settlement measurement device for subway construction according to claim 1, characterized in that: A first elastic member (18) is also provided in the first blind hole of the support plate (1), one end of the first elastic member (18) is fixed in the first blind hole, and the other end is connected to the second measuring rod (16).

5. The settlement measurement device for subway construction according to claim 1, characterized in that: The upper end of the measuring cylinder (2) is a closed structure, and an adjusting cylinder (8) is further provided on the closed end of the measuring cylinder (2), and the adjusting cylinder (8) is connected to the measuring cylinder (2) via a thread; A push plate (13) is further provided at the upper end of the first measuring rod (14), and the push plate (13) is sleeved on the third measuring rod (7). An adjustment plate (11) is further provided in the measuring cylinder (2), and the adjustment plate (11) is located above the push plate (13). The adjustment plate (11) is also sleeved on the third measuring rod (7); A second elastic member (12) is further provided between the adjustment plate (11) and the push plate (13).

6. The settlement measurement device for subway construction according to claim 1, characterized in that: The side wall of the measuring cylinder (2) is further provided with a strip opening (3) and a second scale line (10), and the second scale line (10) is distributed on one side of the strip opening (3) along the axial direction of the measuring cylinder (2); A connecting block connected to the first measuring rod (14) is provided in the strip-shaped opening (3), and a pointer (9) pointing to the second scale line (10) is provided on the connecting block.

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