Bridge pushing support settlement amount measuring device

Abstract

The utility model belongs to the field of bridge construction, and particularly relates to a bridge pushing support settlement measuring device which comprises a hoop combination A and a hoop combination B. The hoop combination A fixes a long triangular frame, a horizontal rod at the bottom of the long triangular frame integrally extends rightwards to form a horizontal fixing plate, a through hole is formed in the horizontal fixing plate, and a positioning cylinder is fixed to the through hole. The dial indicator is fixed on the positioning cylinder; a horizontal reference plate is welded on the hoop assembly B. The measuring head of the dial indicator can abut against the horizontal reference plate. The stable long triangular frame is adopted to replace a traditional long steel pipe, the vibration problem is relieved to a great extent, the measuring accuracy is improved, the dial indicator is fixed in the positioning cylinder, the verticality of a dial indicator measuring rod is guaranteed, the angle of a side rod does not need to be adjusted when the dial indicator is installed, installation is fast and easy, and the measuring accuracy is improved. And the factor of inaccurate measurement caused by inclination of the measuring rod is eliminated.

Description

Technical Field

[0001] The utility model belongs to the field of bridge construction, in particular to a device for measuring the settlement of a bridge jacking support. Background Art

[0002] The bridge jacking method is a commonly used bridge construction method. Using jacking brackets and other jacking equipment such as walking jacking machines, the beam is pushed forward section by section until the entire beam is complete. Before using the jacking brackets for jacking, each of the jacking bracket's steel columns must undergo a load-bearing capacity test. During the load-bearing capacity test, a jack is used to apply the required downward pressure to the steel column. The column's settlement is then measured using a dial indicator. Once all the steel columns meet the settlement requirements, they are connected together to form the jacking bracket.

[0003] Currently, the settlement of steel columns is mostly measured by welding a long steel pipe to the steel column to be measured. The outer end of the long steel pipe is strongly magnetically attached to the dial indicator. Then, a horizontal steel plate is welded to another steel column, and the measuring head of the dial indicator is placed against the steel plate. The settlement of the steel column is measured by the relative displacement between the measuring head and the steel plate. Currently, this measurement method has a large error. Since the distance between the steel columns is large, the long steel pipe used is relatively long. The long steel pipe will vibrate slightly during the bearing capacity test, or it is easily disturbed by the surrounding environment and vibrates, resulting in inaccurate measurements. In addition, the dial indicator with strong magnetic attraction is also prone to vibration, which is also a factor in inaccurate measurements. In addition to the above, it is difficult to keep the long steel pipe horizontal during welding, resulting in the dial indicator adsorbed on the end of the long steel pipe. When adjusting the angle of the measuring rod, it is difficult to ensure that the dial indicator measuring rod is vertically downward. Therefore, the tilt of the measuring rod is also a factor in inaccurate measurements. The above requires a new device to improve the accuracy of the settlement measurement of the jacking bracket. Summary of the Invention

[0004] The problem to be solved by the present invention is to overcome the shortcomings of the background technology and provide a bridge jacking support settlement measuring device.

[0005] The present invention is achieved through the following technical solutions:

[0006] A device for measuring the settlement of a bridge jacking support comprises a clamp assembly A and a clamp assembly B, wherein the clamp assembly A and the clamp assembly B each comprise two parallel clamps, the upper and lower clamps of the clamp assembly A being fixed together by a connecting block A, and the upper and lower clamps of the clamp assembly B being fixed together by a connecting block B; the upper and lower surfaces of the connecting block A are respectively welded with a horizontal upper support plate and a lower support plate, the upper support plate and the lower support plate being respectively welded with the upper and lower clamps, and a level A is provided on the front and rear side surfaces of the connecting block A and the upper surface of the lower support plate; the left end of a long tripod is fixed between the upper support plate and the lower support plate, and the long tripod comprises The horizontal rod at the bottom, the short vertical rod at the left end and the oblique rod at the top, the horizontal rod extends to the right as a whole to form a horizontal fixing plate, a through hole is provided on the horizontal fixing plate, a positioning cylinder is fixed on the through hole, the diameter of the through hole and the inner diameter of the positioning cylinder are equal to the outer diameter of the sleeve of the dial indicator, the sleeve of the dial indicator passes vertically downward through the through hole, a threaded fixing hole is provided on the side of the positioning cylinder, the threaded fixing hole is connected to the through hole, the dial indicator is fixed to the positioning cylinder by a fastening bolt passing through the threaded fixing hole; a horizontal reference plate is welded to the bottom surface of the connecting block B, the measuring head of the dial indicator can abut the horizontal reference plate, a spirit level B is provided on the front and rear sides of the connecting block B and the upper surface of the horizontal reference plate.

[0007] Preferably, a laser marker is installed on the upper surface of the lower support plate.

[0008] Preferably, the upper end of the long tripod is fixed to the upper support plate by bolts, the lower end of the long tripod is fixed to the lower support plate by bolts, and the left end of the long tripod is fixed to the connecting block A by bolts.

[0009] Preferably, a plurality of inner support rods are provided in the middle of the long tripod.

[0010] Preferably, the inner surface of the positioning cylinder is provided with a rubber layer.

[0011] Preferably, a plurality of positioning blocks are provided around the bottom surface of the lower clamp of the clamp assembly A, and the positioning blocks are welded to the steel column to be tested.

[0012] Preferably, a rubber pad is provided on the inner surface of the clamp.

[0013] Beneficial effects of the present invention:

[0014] 1. The present invention adopts a stable long tripod to replace the traditional long steel pipe, which greatly reduces the vibration problem and improves the measurement accuracy.

[0015] 2. The dial indicator of the present invention is fixed without strong magnetic adsorption and a dial indicator bracket. Instead, the dial indicator is fixed in a positioning cylinder. The positioning cylinder also ensures the verticality of the dial indicator measuring rod. There is no need to adjust the angle of the measuring rod when installing the dial indicator. The installation is quick and simple, eliminating the measurement inaccuracy caused by the tilt of the measuring rod.

[0016] 3. The present invention does not require on-site welding of long steel pipes, so there is no need to cut the long steel pipes later and the pipes can be reused, thereby improving test efficiency and saving measurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the test state structure of this embodiment;

[0018] Figure 2 This is a partial enlarged structural diagram of the clamp assembly B in this embodiment;

[0019] Figure 3 This is a partial enlarged structural diagram of the clamp assembly A in this embodiment;

[0020] Figure 4 This is a schematic diagram of the long tripod structure of this embodiment;

[0021] Figure 5 This is an enlarged structural diagram of the horizontal fixed plate of this embodiment.

[0022] In the figure, 1 is the steel column to be measured, 2 is the reference steel column, 3 is the clamp combination A, 4 is the clamp combination B, 5 is the connecting block A, 6 is the connecting block B, 7 is the upper support plate, 8 is the lower support plate, 9 is the level A, 10 is the long tripod, 11 is the horizontal rod, 12 is the short vertical rod, 13 is the diagonal rod, 14 is the horizontal fixing plate, 15 is the positioning cylinder, 16 is the dial indicator, 17 is the sleeve, 18 is the threaded fixing hole, 19 is the fastening bolt, 20 is the horizontal reference plate, 21 is the level B, 22 is the laser marker, 23 is the inner support rod, and 24 is the positioning block. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0024] This embodiment includes a clamp combination A3 and a clamp combination B4. The clamp combination A3 is used to be fixed on a steel column to be subjected to a load-bearing capacity test under pressure, referred to herein as the steel column to be tested 1. The clamp combination A3 will sink along with the sinking of the steel column to be tested 1. The clamp combination B4 is used to be fixed on other steel columns of the jacking bracket that are not subjected to pressure, referred to herein as the reference steel column 2. The reference steel column 2 is not subjected to pressure and does not sink. Generally, the steel column closest to the steel column to be tested 1 is selected as the reference steel column 2. The clamp combination A3 and the clamp combination B4 both include two parallel clamps, one above the other. The diameter of the clamp matches the steel column to be tested 1 or the reference steel column 2. The clamp is a commonly used clamp formed by two semicircular rings that are matched and connected. The two ends of the semicircular rings are bent outward to form mounting ears. The two semicircular rings are fixed together by bolts passing through the mounting ears, thereby fixing them to the component. The clamp is a commonly used component, and its structure will not be described in detail here. To ensure the firmness of the clamp, a rubber pad is preferably provided on the inner surface of the clamp to increase the friction and adhesion between the clamp and the steel column. To further ensure the stability of the clamp assembly A3 during the test, after the clamp assembly A3 is fixed to the steel column 1 to be tested, a number of positioning blocks 24 are preferably evenly distributed around the bottom surface of the clamp below the clamp assembly A3. The positioning blocks 24 are welded to the steel column 1 to be tested. The positioning blocks 24 support the clamp assembly A3 and prevent downward displacement of the clamp assembly A3 due to vibration during the pressure application process.

[0025] In this embodiment, the upper and lower clamps of the clamp assembly A3 are fixedly connected together by a connecting block A5 to form a whole. Similarly, the upper and lower clamps of the clamp assembly B4 are fixedly connected together by a connecting block B6 to form a whole. The upper support plate 7 and the lower support plate 8 are welded to the upper and lower surfaces of the connecting block A5 of the clamp assembly A3 respectively. The upper support plate 7 is welded to the clamp above the clamp assembly A3, and the lower support plate 8 is welded to the clamp below the clamp assembly A3. The left end of a long tripod 10 is fixed between the upper support plate 7 and the lower support plate 8. The long tripod 10 includes a horizontal rod 11 at the bottom, a short vertical rod 12 at the left end, and an oblique rod 13 at the top. The height of the short vertical rod 12 is equal to the distance between the upper support plate 7 and the lower support plate 8, that is, the left end of the long tripod 10 can just be stuck between the upper support plate 7 and the lower support plate 8. For secure fixation, the upper ends of the short vertical rods 12 of the long tripod 10 and the upper support plate 7 are preferably provided with corresponding threaded holes, and the upper end of the long tripod 10 is fixed to the upper support plate 7 by bolts; the lower ends of the short vertical rods 12 of the long tripod 10 and the lower support plate 8 are provided with corresponding threaded holes, and the lower end of the long tripod 10 is fixed to the lower support plate 8 by bolts; the short vertical rod 12 at the left end of the long tripod 10 and the right side of the connecting block A5 are provided with corresponding bolt holes, and the left end of the long tripod 10 is fixed to the connecting block A5 by bolts. The long tripod 10 used in the present invention is much more stable than the long steel tube structure used in traditional methods, greatly reducing the vibration problem. To further enhance stability, the long tripod 10 is preferably provided with several internal support rods 23 in the middle.

[0026] Levels A9 are installed on the front and rear sides of the connecting block A5 of the clamp assembly A3 and on the upper surface of the lower support plate 8. Levels A9 are used to adjust the verticality of the connecting block A5 and the horizontality of the lower support plate 8. Only when the lower support plate 8 is level can the horizontality and verticality of the long tripod 10 installed thereon be guaranteed. To further ensure that the extended long tripod 10 remains horizontal, a laser marker 22 is preferably installed on the upper surface of the lower support plate 8. The laser line emitted by the laser marker 22 is flush with the bottom surface of the horizontal rod 11 of the long tripod 10. During the installation of the long tripod 10, the horizontality of the long tripod 10 can be observed based on the laser line, and the long tripod 10 can be fine-tuned based on the laser line to ensure the horizontality and verticality of the long tripod 10. Later, the verticality of the measuring rod of the dial indicator 16 fixed to the long tripod 10 can be guaranteed.

[0027] The horizontal rod 11 at the bottom of the long tripod 10 extends integrally to the right to form a horizontal fixing plate 14. A through-hole is provided in the horizontal fixing plate 14, and a positioning cylinder 15 is fixed to the upper surface of the through-hole. The diameter of the through-hole and the inner diameter of the positioning cylinder 15 are both equal to the outer diameter of the sleeve 17 of the dial indicator 16. The central axis of the through-hole is coaxial with the central axis of the positioning cylinder 15. The positioning cylinder 15 is used to guide and position the dial indicator 16. The sleeve 17 of the dial indicator 16 passes vertically downward through the through-hole, with the lower portion of the sleeve 17 located below the horizontal fixing plate 14. A threaded fixing hole 18 is provided on the side of the positioning cylinder 15, which is connected to the through-hole. The dial indicator 16 is fixed to the positioning cylinder 15 by a fastening bolt 19 passing through the threaded fixing hole 18. To further secure the dial indicator 16, a rubber layer is preferably provided on the inner surface of the positioning cylinder 15.

[0028] A horizontal reference plate 20 is welded to the bottom surface of the connecting block B6 of the clamp assembly B4. The horizontal reference plate 20 is located below the dial indicator 16. The vertically downward measuring head of the dial indicator 16 can abut the horizontal reference plate 20. The measuring rod and measuring head of the dial indicator 16 will move downward along with the settlement of the steel column 1 to be measured. The settlement of the steel column 1 to be measured can be measured by the displacement of the measuring rod of the dial indicator 16 relative to the horizontal reference plate 20. A spirit level B21 is installed on the front and rear sides of the connecting block B6 and the upper surface of the horizontal reference plate 20. The spirit level B21 is used to ensure that the horizontal reference plate 20 is in a horizontal state.

[0029] During the bearing capacity test, use the level A9 to adjust the lower support plate 8 to a horizontal state and the connecting block A5 to a vertical state. After adjustment, fix the clamp assembly A3 on the steel column 1 to be tested. Then place the left end of the long tripod 10 on the lower support plate 8 and insert it between the upper support plate 7 and the lower support plate 8. Fix the long tripod 10 and the clamp assembly A3 together with the bolts. Then insert the dial indicator 16 into the positioning tube 15 of the horizontal fixing plate 14 at the right end of the long tripod 10 and tighten the fastening bolts 19 to fix it. Use the dial indicator 16 to fix the clamp combination B4 on the reference steel column 2, adjust the horizontal reference plate 20 to be in a horizontal state, and at the same time, the upper surface of the horizontal reference plate 20 is in contact with the measuring head of the dial indicator 16. After debugging, fix the clamp combination B4, and then apply the specified pressure to the top surface of the steel column 1 to be measured through the jack. The steel column 1 to be measured sinks under the pressure, and the long tripod 10 and the dial indicator 16 sink synchronously. The settlement of the steel column 1 to be measured is measured by the relative displacement between the measuring rod of the dial indicator 16 and the horizontal reference plate 20.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for measuring the settlement of a bridge jacking support, comprising a dial indicator (16), characterized in that: The invention comprises a clamp assembly A (3) and a clamp assembly B (4), wherein the clamp assembly A (3) and the clamp assembly B (4) both comprise upper and lower parallel clamps, the upper and lower clamps of the clamp assembly A (3) are fixed together by a connecting block A (5), and the upper and lower clamps of the clamp assembly B (4) are fixed together by a connecting block B (6); a horizontal upper support plate (7) and a lower support plate (8) are welded to the upper and lower surfaces of the connecting block A (5), respectively, and the upper support plate (7) and the lower support plate (8) are welded to the upper and lower clamps, respectively, and a level A (9) is provided on the front and rear side surfaces of the connecting block A (5) and the upper surface of the lower support plate (8); the left end of a long tripod (10) is fixed between the upper support plate (7) and the lower support plate (8), and the long tripod (10) comprises a horizontal rod (11) at the bottom, a short vertical rod (12) at the left end, and an oblique rod ( 13), the horizontal rod (11) is integrally extended to the right to form a horizontal fixing plate (14), a through hole is provided on the horizontal fixing plate (14), a positioning cylinder (15) is fixed on the through hole, the diameter of the through hole and the inner diameter of the positioning cylinder (15) are equal to the outer diameter of the sleeve (17) of the dial indicator (16), the sleeve (17) of the dial indicator (16) vertically passes through the through hole, a threaded fixing hole (18) is provided on the side of the positioning cylinder (15), the threaded fixing hole (18) is connected to the through hole, and the dial indicator (16) is fixed to the positioning cylinder (15) by a fastening bolt (19) passing through the threaded fixing hole (18); the bottom surface of the connecting block B (6) is welded with a horizontal reference plate (20), the measuring head of the dial indicator (16) can abut the horizontal reference plate (20), and a level B (21) is provided on the front and rear sides of the connecting block B (6) and the upper surface of the horizontal reference plate (20).

2. The bridge jacking support settlement measuring device according to claim 1 is characterized in that: A laser marker (22) is mounted on the upper surface of the lower support plate (8).

3. The bridge jacking support settlement measuring device according to claim 1 is characterized in that: The upper end of the long tripod (10) is fixed to the upper support plate (7) by bolts, the lower end of the long tripod (10) is fixed to the lower support plate (8) by bolts, and the left end of the long tripod (10) is fixed to the connecting block A (5) by bolts.

4. The bridge jacking support settlement measuring device according to claim 1 is characterized in that: A plurality of inner support rods (23) are provided in the middle of the long tripod (10).

5. The bridge jacking support settlement measuring device according to claim 1 is characterized in that: The inner surface of the positioning cylinder (15) is provided with a rubber layer.

6. The bridge jacking support settlement measuring device according to claim 1, characterized in that: A plurality of positioning blocks (24) are provided around the bottom surface of the lower clamp of the clamp assembly A (3), and the positioning blocks (24) are welded to the steel column (1) to be tested.

7. The bridge jacking support settlement measuring device according to claim 1 is characterized in that: A rubber pad is provided on the inner surface of the clamp.

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