Early warning control system for box girder prestress tension grouting

Abstract

The utility model discloses a box girder prestress tension mud jacking early warning control system which comprises a tension mud jacking measurement and control module installed on a box girder, a data control terminal connected with the tension mud jacking measurement and control module through a data transmission component and a control component used for adjusting the box girder. The corrugated pipe is sleeved on the prestressed tendon, the end of the corrugated pipe at the opening of the box girder is provided with an anchor bearing plate, and the outer side surface of the anchor bearing plate is connected with an anchorage device plate; the tension grouting measurement and control module comprises a sound wave receiver arranged on an anchor bearing plate, a pressure sensor arranged on an oil inlet nozzle and an elongation sensor arranged on a prestressed tendon; according to the utility model, different types of sensors are adopted to collect different information in the box girder, the prestress tension and grouting in the box girder can be detected, adjustment is carried out according to the detection result, and the safety and reliability of construction are enhanced.

Description

Technical Field

[0001] The present invention relates to the field of practical building construction monitoring technology, specifically to an early warning control system for prestressed tensioning and grouting of box beams. Background Art

[0002] In modern bridge construction, prestressed concrete technology is one of the key technologies to improve the performance of bridge structures and extend their service life. Especially in the construction of large-span bridges, prestressed concrete box girders are widely used due to their excellent bearing capacity and economic benefits. The introduction of prestressing improves the performance of concrete and the stability of the structure by resisting the tensile stress under future loads through pre-applied tension. In the construction process of prestressed concrete structures, tensioning prestressed tendons and grouting are two crucial steps.

[0003] The purpose of tensioning prestressed tendons is to pre-introduce prestress inside the concrete structure, while grouting is to protect the prestressed tendons from corrosion and ensure the complete transfer of prestress. However, these two processes face many challenges. First, how to accurately control the tensioning force during the tensioning process to ensure that each tendon is tensioned evenly is a key factor affecting the safety and service life of the structure. Secondly, how to ensure the full flow and filling of the slurry during the grouting process to avoid bubbles and leakage is an important link in ensuring the long-term durability of the prestressed tendons.

[0004] Although the existing technology provides a variety of monitoring and control methods, including using tension control systems to adjust tension and using rheological tests to evaluate the fluidity of slurry, there are still some shortcomings. For example, the existing tension control system often cannot provide real-time feedback on small changes in tension, resulting in inaccurate tension control; the existing grouting quality detection methods are mostly carried out after grouting is completed, making it difficult to detect and solve problems that occur during the grouting process in real time. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a box girder prestressing tensioning and grouting early warning control system, which solves the problems mentioned in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a box girder prestressed tensioning and grouting early warning control system, characterized in that it includes a tensioning and grouting measurement and control module installed on the box girder and a data control terminal connected to the tensioning and grouting measurement and control module through a data transmission component, and a control component for adjusting the box girder.

[0007] Furthermore, prestressed tendons and corrugated pipes are arranged in the box beam. The corrugated pipe is sleeved on the prestressed tendons. An anchor plate is installed on the end of the corrugated pipe at the opening of the box beam, and an anchor plate is connected to the outer side of the anchor plate.

[0008] Furthermore, a slurry inlet is arranged on the box beam, and the slurry inlet is connected to the corrugated pipe.

[0009] Furthermore, spiral ribs are arranged around the anchor plate.

[0010] Furthermore, the tensioning and grouting measurement and control module includes an acoustic wave receiver arranged on the anchor plate, a pressure sensor arranged on the oil inlet nozzle and an elongation sensor arranged on the prestressed tendon; the acoustic wave receiver, the pressure sensor and the elongation sensor are all connected to the data control terminal through a data transmission component.

[0011] Furthermore, the control component includes a hydraulic jack and a grouting assembly. The hydraulic jack is connected to the anchor plate through a limit plate, and the grouting assembly is used to grout the box girder.

[0012] Furthermore, the hydraulic jack includes a shell connected to the anchor plate through a limit plate, a piston and an oil pump are arranged in the shell, the oil pump is connected to the piston and is used to control the tensioning of the piston, and an oil inlet nozzle and an oil outlet nozzle are arranged on the shell, and the oil inlet nozzle and the oil outlet nozzle are connected to the oil pump.

[0013] Furthermore, one end of the prestressed tendon arranged in the box beam passes through the piston.

[0014] Furthermore, the grouting assembly includes a slurry storage box, a grouting pump is arranged in the slurry storage box, a slurry outlet is arranged on the slurry storage box, one end of the slurry outlet is connected to the grouting pump, and the other end of the slurry outlet is connected to the box beam.

[0015] Compared with the existing technology, the utility model has the following beneficial effects: the utility model adopts different types of sensors to collect different information in the box girder, detects the prestressed tensioning and grouting in the box girder, and makes adjustments according to the detection results, thereby enhancing the safety and reliability of construction; the utility model conducts independent detection of prestressed tensioning and grouting in the box girder without affecting each other, which is convenient for adjustment and maintenance; the utility model adopts pressure sensors and elongation sensors to feedback slight changes in the tensioning force in the box girder, and through the grouting assembly, the box girder can be filled when it is detected that the density of the grouting in the box girder is insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the prestressed tensioning early warning structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the grouting warning structure of the utility model.

[0018] In the figure: 1. Box girder; 2. Bellows; 3. Spiral reinforcement; 4. Anchor plate; 5. Oil inlet; 6. Oil outlet; 7. Hydraulic jack; 8. Piston; 9. Prestressed reinforcement; 10. Anchor plate; 11. Limit plate; 12. Pressure sensor; 13. Elongation sensor; 14. Data transmission component; 15. Data control terminal; 16. Oil pump; 17. Slurry inlet; 18. Sound wave receiver; 19. Grouting pump; 20. Slurry outlet. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 2 As shown, the utility model provides a technical solution: a box girder prestressed tensioning and grouting early warning control system, including a tensioning and grouting measurement and control module installed on the box girder 1 and a data control terminal 15 connected to the tensioning and grouting measurement and control module through a data transmission component 14, and a control component for adjusting the box girder 1.

[0020] Among them, the box beam 1 is provided with a prestressed tendon 9 and a corrugated pipe 2, the corrugated pipe 2 is sleeved on the prestressed tendon 9, and an anchor plate 4 is installed on the end of the corrugated pipe 2 at the opening of the box beam 1, and the outer side of the anchor plate 4 is connected to an anchor plate 10

[0021] The anchor plate 4 is surrounded by spiral ribs 3 .

[0022] The box beam 1 is provided with a slurry inlet 17 , and the slurry inlet 17 is connected to the corrugated pipe 2 .

[0023] Among them, the tensioning and grouting measurement and control module includes an acoustic wave receiver 18 arranged on the anchor plate 4, a pressure sensor 12 arranged on the oil inlet nozzle 5 and an elongation sensor 13 arranged on the prestressed tendon 9; the acoustic wave receiver 18, the pressure sensor 12 and the elongation sensor 13 are all connected to the data control terminal 15 through the data transmission component 14.

[0024] The control component includes a hydraulic jack 7 and a grouting assembly. The hydraulic jack 7 is connected to the anchor plate 10 through a limit plate 11. The grouting assembly is used to grout the box girder 1.

[0025] Among them, the hydraulic jack 7 includes a shell connected to the anchor plate 10 through a limit plate 11, and a piston 8 and an oil pump 16 are arranged in the shell. The oil pump 16 is connected to the piston 8 and is used to control the piston 8 for tensioning. An oil inlet nozzle 5 and an oil outlet nozzle 6 are arranged on the shell, and the oil inlet nozzle 5 and the oil outlet nozzle 6 are connected to the oil pump 16.

[0026] One end of the prestressed tendon 9 arranged in the box beam 1 passes through the piston 8 .

[0027] The grouting assembly includes a grouting box, a grouting pump 19 is arranged in the grouting box, a grouting outlet 20 is arranged on the grouting box, one end of the grouting outlet 20 is connected to the grouting pump 19, and the other end of the grouting outlet 20 is connected to the box beam 1.

[0028] In summary, the workflow of the utility model is as follows: the utility model is divided into prestressing early warning and grouting early warning of box girder 1;

[0029] Prestressed box girder 1 prestressing warning: when in use, the oil pump 16 is controlled by adjusting the oil output of the oil inlet nozzle 5 and the oil outlet nozzle 6 to drive the piston 8 to move, so that the piston 8 drives the prestressed tendon 9 to be tensioned. The pressure sensor 12 and the elongation sensor 13 respectively transmit the collected hydraulic oil pressure data of the oil inlet nozzle 5 and the collected elongation data of the prestressed tendon 9 to the data control terminal 15 through the data transmission component 14. The data control terminal 15 calculates and judges the hydraulic oil pressure data and the elongation data of the prestressed tendon 9. When it is judged that the tensioning of the prestressed tendon 9 is abnormal, the data control terminal 15 issues an alarm and records the abnormal data. The data control terminal 15 controls the oil pump 16 to adjust the tensioning process.

[0030] Grouting warning: During grouting, the slurry enters the corrugated pipe 2 through the grouting inlet 17. When the grouting reaches a certain extent, the slurry enters the corrugated pipe 2 and forms a prestressed pipe with the prestressed tendons 9, and knocks on different positions of the prestressed pipe. The sound wave receiver 18 transmits the shock waves received at different times to the data control terminal 15 through the data transmission component 14. The data control terminal 15 calculates and determines the density of the grouting in the current box girder 1. When the density is insufficient, the data control terminal 15 controls the grouting pump 19 to output the slurry through the grouting outlet 20 into the box girder 1 for filling.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A box girder prestressing tension grouting early warning control system, characterized in that: The invention comprises a tensioning and grouting measurement and control module installed on a box girder (1), a data control terminal (15) connected to the tensioning and grouting measurement and control module via a data transmission component (14), and a control component for adjusting the box girder (1); the box girder (1) is provided with a prestressed tendon (9) and a bellows (2); the bellows (2) is sleeved on the prestressed tendon (9); an anchor plate (4) is installed on the end of the bellows (2) at the opening of the box girder (1); the outer side of the anchor plate (4) is connected to an anchor plate (10); the control component comprises a hydraulic jack (7) and a grouting assembly; the hydraulic jack (7) is connected to the anchor plate (10) via a limit plate (11); the grouting assembly is used for grouting the box girder (1); the hydraulic jack (7) comprises a limit plate (11) and a grouting assembly; The position plate (11) is connected to a shell on the anchor plate (10), a piston (8) and an oil pump (16) are arranged in the shell, the oil pump (16) is connected to the piston (8) and is used to control the piston (8) to perform tensioning, an oil inlet nozzle (5) and an oil outlet nozzle (6) are arranged on the shell, and the oil inlet nozzle (5) and the oil outlet nozzle (6) are connected to the oil pump (16); the tensioning grouting measurement and control module comprises an acoustic wave receiver (18) arranged on the anchor plate (4), a pressure sensor (12) arranged on the oil inlet nozzle (5) and an elongation sensor (13) arranged on the prestressed tendon (9); the acoustic wave receiver (18), the pressure sensor (12) and the elongation sensor (13) are all connected to the data control terminal (15) via a data transmission component (14).

2. According to claim 1, a box girder prestressing tensioning grouting early warning control system is characterized in that: The box beam (1) is provided with a slurry inlet (17), and the slurry inlet (17) is connected to the corrugated pipe (2).

3. The box girder prestressing tensioning grouting early warning control system according to claim 2 is characterized by: The anchor plate (4) is provided with spiral ribs (3) surrounding it.

4. The box girder prestressing tensioning grouting early warning control system according to claim 3 is characterized by: One end of a prestressed tendon (9) disposed in the box beam (1) passes through the piston (8).

5. The box girder prestressing tensioning grouting early warning control system according to claim 4 is characterized by: The grouting assembly comprises a grouting box, a grouting pump (19) is arranged in the grouting box, and a grouting outlet (20) is arranged on the grouting box, one end of the grouting outlet (20) is connected to the grouting pump (19), and the other end of the grouting outlet (20) is connected to the box beam (1).

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