Box girder prestress circulating pipeline grouting equipment

Abstract

The utility model belongs to the technical field of bridge construction, particularly relates to box girder prestress circulating pipeline mud jacking equipment, and aims to solve the problems that the existing mud jacking is only single-channel independent mud jacking, and water and air exist in the slurry and the channel, so that the slurry cannot completely fill the channel, and the mud jacking effect is poor. The box girder grouting device comprises a box girder and a grouting machine, a plurality of anchor bearing plates corresponding to grouting holes are arranged at the two ends of the box girder, mounting pipes are arranged on one sides of the anchor bearing plates in a threaded mode, and the box girder grouting device can be conveniently disassembled and assembled through connection of the anchor bearing plates and the mounting pipes and can be immediately disassembled after grouting is completed, so that the construction efficiency can be improved; and the device is more stable in the use process and is convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a grouting device for a box girder prestressed circular pipeline. Background Art

[0002] The construction quality of the grouting of the short - bundle prestressed tendon ducts of precast box girders in bridge engineering directly affects the safety and reliability of the bridge. However, the current grouting technology causes water and air in the ducts to mix in the cement slurry to form bubbles, and the grouting density is insufficient, seriously affecting the construction quality.

[0003] After retrieval, the utility model with the publication number CN211541760U discloses a vacuum - assisted circular grouting device for precast box girders. The device also has the following disadvantages during use:

[0004] When in use, the connecting pipe is installed on the anchor plate, and the connecting pipe is removed after the internal slurry solidifies. However, the time required for the slurry to solidify is relatively long, and the number of connecting pipes is small. In this way, other box girders cannot be grouted during the solidification process, and the efficiency is low.

[0005] Moreover, the existing grouting is only for individual channels separately. Due to the presence of moisture and air in the slurry and the channels, the slurry cannot completely fill the channels, and the grouting effect is not good. Content of the Utility Model

[0006] The purpose of the utility model is to solve the problem in the prior art that the connecting pipe is installed on the anchor plate, and the connecting pipe is removed after the internal slurry solidifies. However, the time required for the slurry to solidify is relatively long, and the number of connecting pipes is small. In this way, other box girders cannot be grouted during the solidification process, and the efficiency is low, and a grouting device for a box girder prestressed circular pipeline is proposed.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A grouting device for a box girder prestressed circular pipeline includes a box girder and a grouting machine. A plurality of anchor plates corresponding to grouting holes are arranged at both ends of the box girder. An installation pipe is threadedly arranged on one side of the anchor plate to form a grouting channel, and one end of the box girder is sealed after grouting. Adjacent two grouting channels are connected through a second connecting pipe to form a circulation channel;

[0009] The grouting machine is arranged on one side of the box girder, and two first connecting pipes are connected to the discharging end. The other ends of the two first connecting pipes are respectively connected to one ends of the two lower installation pipes for grouting into the box girder.

[0010] In a possible design, a valve for controlling the flow of the slurry is arranged on the installation pipe.

[0011] In a possible design, the number of installation pipes located at both ends of the box girder is an even number.

[0012] In a possible design, the anchor backing plate includes a casting ring arranged inside the box girder. A connecting ring is arranged inside the casting ring, and an extension ring is arranged inside the connecting ring. The extension ring is connected to the anchor. A rotating ring is rotatably sleeved on the outer wall of the extension ring. A threaded hole for threaded connection with the installation pipe is formed on one side of the rotating ring. A rectangular hole for cooperating with the threaded hole is formed on one side of the connecting ring. When the rectangular hole and the threaded hole are misaligned, the box girder is sealed. A limiting member is arranged between the rotating ring and the connecting ring for controlling the rotation of the rotating ring.

[0013] In a possible design, the limiting member includes a bolt threadedly arranged through one side of the rotating ring. A second positioning hole and a first positioning hole for cooperating with the bolt are formed on one side of the connecting ring. When the bolt is inserted into the second positioning hole, the rectangular hole corresponds to the threaded hole. When the bolt is inserted into the first positioning hole, the rectangular hole and the threaded hole are misaligned.

[0014] In a possible design, a limiting ring for cooperating with the rotating ring is fixedly sleeved on the outer wall of the installation pipe for positioning the installation pipe.

[0015] In this application, during use, the installation pipe is screwed into the corresponding threaded hole until the limiting ring abuts against the rotating ring to form a grouting channel. The adjacent grouting channels are connected in series through the second connecting pipe, and the valve is opened. Then, the grouting machine is started to grout into the box girder until the material discharged from the installation pipe located above is evenly qualified, and then the grouting machine and the valve are closed;

[0016] Then, the bolt is turned so that one end of the bolt disengages from the second positioning hole, and then the rotating ring is rotated. During the rotation of the rotating ring, the threaded hole and the rectangular hole can be misaligned with each other. At this time, the slurry inside the box girder will not leak. Until the rotating bolt corresponds to the first positioning hole, and then the bolt is screwed into the first positioning hole to limit the rotating ring. Finally, the installation pipe is removed and installed on the remaining box girders for grouting.

[0017] Beneficial effects:

[0018] In the present utility model, for the box girder prestressed cyclic pipeline grouting equipment, through the unique combined design of the casting ring, connecting ring, extension ring and rotating ring of the anchor backing plate, not only the reliable connection between the installation pipe and the box girder is realized, but also the opening and sealing functions of the grouting channel are realized through the rotation of the rotating ring and the cooperation of the rectangular hole and the threaded hole. This design not only improves the sealing performance, but also increases the operation flexibility, facilitating the adjustment of the state of the grouting channel according to actual needs. At the same time, the installation pipe can be removed before the slurry solidifies, improving the construction efficiency;

[0019] In the present utility model, for the grouting equipment for the prestressed circular pipeline of the box girder, through the setting of the limiting member, the stability and accuracy of the rotating ring during rotation are ensured, preventing the position deviation of the rotating ring caused by misoperation or external force, thereby guaranteeing the sealing performance of the grouting channel and the safety of the grouting process. The limiting ring arranged on the outer wall of the installation pipe is used in cooperation with the rotating ring to achieve the precise positioning and fixation of the installation pipe, and can prevent the installation pipe from contacting the rectangular hole when the rotating ring rotates;

[0020] In the present utility model, through the connection between the anchor backing plate and the installation pipe, it can be conveniently disassembled and assembled, and is immediately removed after grouting is completed, which can improve the construction efficiency, and is more stable during use and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structure diagram of a grouting equipment for the prestressed circular pipeline of the box girder proposed by the present utility model;

[0022] Figure 2 is a structural diagram of the anchor backing plate of a grouting equipment for the prestressed circular pipeline of the box girder proposed by the present utility model;

[0023] Figure 3 is an exploded structural diagram of the anchor backing plate of a grouting equipment for the prestressed circular pipeline of the box girder proposed by the present utility model.

[0024] In the figure: 1, box girder; 2, grouting machine; 3, first connecting pipe; 4, installation pipe; 5, valve; 6, second connecting pipe; 7, pouring ring; 8, extension ring; 9, bolt; 10, rotating ring; 11, limiting ring; 12, connecting ring; 13, rectangular hole; 14, threaded hole; 15, first positioning hole; 16, second positioning hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0026] Embodiment 1

[0027] Refer to Figures 1 - 3 , a grouting equipment, including: box girder 1 and grouting machine 2. The box girder 1 is used as the main structure, and a plurality of anchor backing plates are provided at both ends thereof, and the positions of these anchor backing plates correspond to the grouting holes on the box girder 1 one by one. The design of the anchor backing plate aims to form a stable grouting channel and ensure that the slurry can be smoothly injected into the box girder.

[0028] Specifically, an installation pipe 4 is installed on one side of the anchor plate through a threaded connection method. One end of the installation pipe 4 is tightly connected to the anchor plate, and the other end is reserved with an interface for connecting other pipelines or devices. A valve 5 is provided on the installation pipe 4 to control the flow of the slurry when needed, so as to achieve precise grouting and pressure grouting control.

[0029] To achieve cyclic grouting, two adjacent grouting channels are connected by a second connecting pipe 6 to form a closed-loop cyclic channel. The two installation pipes 4 located below are both connected to the grouting machine 2 through the first connecting pipe 3. In this way, when the grouting machine 2 starts to work, the slurry can enter a grouting channel of the box girder 1 through the first connecting pipe 3, then flow along the cyclic channel, and finally be discharged through the two installation pipes 4 above to achieve cyclic grouting. The grouting machine 2 adopts the grouting machine in the patent document CN217353603U.

[0030] Regarding the specific structure of the anchor plate, it includes a casting ring 7 arranged in the box girder 1, and a connecting ring 12 is nested inside the casting ring 7. An extension ring 8 is provided inside the connecting ring 12, and the extension ring 8 is used to connect with an anchor such as a prestressed steel strand to achieve the transfer of prestress.

[0031] To control the connection state between the installation pipe 4 and the anchor plate, a rotating ring 10 is sleeved on the outer wall of the extension ring 8 in a rotatable manner. A threaded hole 14 is opened on one side of the rotating ring 10, and the threaded hole 14 matches the threaded part of the installation pipe 4 to achieve detachable connection. At the same time, a rectangular hole 13 is opened on one side of the connecting ring 12, and the rectangular hole 13 corresponds to the threaded hole 14 at a specific position for the flow of the slurry. When the rectangular hole 13 is misaligned with the threaded hole 14, the connecting ring 12 can be sealed to achieve plugging.

[0032] To control the rotation of the rotating ring 10, a limiting member is provided. The limiting member includes a bolt 9 threadedly arranged through one side of the rotating ring 10. Two positioning holes are opened on one side of the connecting ring 12: a second positioning hole 16 and a first positioning hole 15. When the bolt 9 is inserted into the second positioning hole 16, the rectangular hole 13 corresponds to the threaded hole 14, allowing the slurry to flow; when the bolt 9 is inserted into the first positioning hole 15, the rectangular hole 13 is misaligned with the threaded hole 14, and at this time, the connecting ring 12 can be sealed.

[0033] This application can be used in the field of bridge construction and also in other fields applicable to this application.

[0034] Embodiment 2

[0035] Reference Figures 1 - 3, improved on the basis of Embodiment 1: A box girder prestressed cyclic pipeline grouting equipment, which is applied to the field of bridge construction. In addition, in order to position the installation pipe 4 during the installation process, a limit ring 11 is fixedly sleeved on its outer wall. The limit ring 11 is used in cooperation with the rotating ring 10 to ensure the installation depth of the installation pipe 4 and prevent the installation pipe 4 from jamming with the rectangular hole 13 during the rotation of the rotating ring 10.

[0036] Moreover, the number of installation pipes 4 at both ends of the box girder 1 is even, so that the installation pipe 4 for feeding below and the installation pipe 4 for discharging above are located on the same side, facilitating the observation of the discharging situation.

[0037] However, as is well known to those skilled in the art, the working principle and wiring method of the grouting machine 2 are common knowledge, which belong to conventional means or well-known common sense, and will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0038] During the specific implementation process, the following aspects need to be noted:

[0039] I. Preparation work:

[0040] 1. Ensure that there are no sundries, oil stains, etc. in the prestressed pipeline, and keep the pipeline unobstructed.

[0041] 2. Prepare cement slurry that meets the design requirements, and its strength grade is not lower than 42.5.

[0042] 3. Check the grouting equipment, such as the grouting pump, slurry storage tank, mixer, etc., to ensure that it is in good working condition.

[0043] II. Grouting operation:

[0044] 1. Use the grouting pump to carry out grouting, ensure that the grouting process is continuous and slow, and avoid generating excessive pressure shocks.

[0045] 2. During the grouting process, closely monitor the flow of the cement slurry, continuously inject the cement slurry into the prestressed pipeline through the circulation mechanism, and discharge the air and excess water in the pipeline.

[0046] 3. Strictly control the consistency and grouting pressure of the cement slurry to ensure that the cement slurry can fully fill the prestressed pipeline, while avoiding excessive pressure damage to the pipeline.

[0047] III. Quality control:

[0048] 1. During the grouting process, regularly take samples to detect the performance indicators of the cement slurry, such as strength, consistency, etc., to ensure that they meet the design requirements.

[0049] 2. After the grouting is completed, check the prestressed pipeline to confirm that there are no phenomena such as slurry leakage and pipe blockage.

[0050] Before sealing the anchor, anti-rust treatment shall be carried out on the anchor, and it shall be sealed with a sealing material with good durability and anti-corrosion performance.

[0051] IV. Precautions:

[0052] 1. During the grouting process, operating procedures and safety regulations shall be strictly observed to ensure the safety of personnel and equipment.

[0053] 2. In case of abnormal situations, grouting shall be stopped immediately and the reasons shall be identified. Grouting can be continued only after the problems are solved.

[0054] 3. After grouting is completed, the site and grouting equipment shall be cleaned in a timely manner to prepare for the next process.

[0055] To sum up, the cyclic grouting technology is an effective prestressed duct grouting process. Through strict preparation, operation and quality control measures, we can ensure the quality of prestressed duct grouting and the durability of the structure. Of course, the following is the further refined content of the cyclic grouting technology disclosure:

[0056] V. Advantages and applications of cyclic grouting technology:

[0057] 1. Improve grouting quality: The cyclic grouting technology can ensure the uniform distribution of cement slurry in the prestressed duct through continuous circulation and exhaust, reduce the formation of air bubbles and voids, and thus improve the density and quality of grouting.

[0058] 2. Enhance the durability of the structure: Due to the improvement of grouting quality, the bonding force between the concrete in the prestressed duct and the prestressed tendons is enhanced, which helps to improve the durability and stability of the entire structure.

[0059] 3. Reduce construction time: Compared with the traditional pressure-controlled grouting method, the cyclic grouting technology can more quickly discharge the air and excess moisture in the duct, shorten the grouting time, and improve the construction efficiency.

[0060] 4. Adapt to complex duct structures: For prestressed ducts with complex geometries or long spans, the cyclic grouting technology can more effectively ensure the filling effect of cement slurry and reduce the problem of uneven grouting caused by the duct shape.

[0061] VI. Monitoring and adjustment during construction:

[0062] 1. Pressure monitoring: During the grouting process, the output pressure of the grouting pump shall be continuously monitored to ensure that it fluctuates within a reasonable range. If the pressure is found to rise or fall abnormally, the grouting speed shall be adjusted in a timely manner or the duct shall be checked for blockage.

[0063] 2. Flow monitoring: By monitoring the flow changes of cement slurry, it is possible to determine whether there is blockage or leakage in the pipeline. Once abnormal flow is found, grouting should be stopped immediately and the cause should be found out.

[0064] 3. Adjustment of cement slurry performance: According to the actual situation on site and the grouting effect, timely adjust the cement slurry's performance parameters such as consistency and water-cement ratio to ensure that it meets the construction requirements.

[0065] 7. Post-maintenance and care:

[0066] 1. Pipeline protection: After grouting is completed, necessary protection measures should be taken for the prestressed pipeline to prevent it from being damaged during subsequent construction.

[0067] 2. Regular inspection: Regularly inspect the prestressed pipes and their grouting quality to promptly identify and address potential problems and ensure the safety and durability of the structure.

[0068] 3. Data archiving: All data, records and inspection results of the grouting process shall be sorted and archived to provide reference and basis for subsequent projects.

[0069] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A box girder prestressed circulating pipeline grouting equipment, characterized in that: It comprises a box girder (1) and a grouting machine (2), wherein a plurality of anchor pads corresponding to grouting holes are provided at both ends of the box girder (1), a mounting pipe (4) is threadedly provided on one side of the anchor pad to form a grouting channel, and after grouting is completed, one end of the box girder (1) is sealed, and two adjacent grouting channels are connected via a second connecting pipe (6) to form a circulation channel; The grouting machine (2) is arranged on one side of the box girder (1), and the discharge end is connected to two first connecting pipes (3), and the other ends of the two first connecting pipes (3) are respectively connected to one end of two mounting pipes (4) below, for grouting inside the box girder (1).

2. The box girder prestressed circulating pipeline grouting equipment according to claim 1 is characterized in that: The installation pipe (4) is provided with a valve (5) for controlling the flow of slurry.

3. The box girder prestressed circulating pipeline grouting equipment according to claim 1 is characterized in that: The number of the mounting tubes (4) located at both ends of the box beam (1) is an even number.

4. The box girder prestressed circulating pipeline grouting equipment according to claim 1 is characterized in that: The anchor pad comprises a casting ring (7) arranged in the box girder (1), a connecting ring (12) is arranged in the casting ring (7), an extension ring (8) is arranged in the connecting ring (12), the extension ring (8) is connected to the anchor, a rotating ring (10) is rotatably sleeved on the outer wall of the extension ring (8), a threaded hole (14) threadedly connected to the mounting pipe (4) is provided on one side of the rotating ring (10), a rectangular hole (13) used in conjunction with the threaded hole (14) is provided on one side of the connecting ring (12), and the box girder (1) is sealed when the rectangular hole (13) and the threaded hole (14) are misaligned, and a limiter is provided between the rotating ring (10) and the connecting ring (12) for controlling the rotation of the rotating ring (10).

5. The box girder prestressed circulating pipeline grouting equipment according to claim 4 is characterized in that: The limiting member comprises a bolt (9) which penetrates through a thread and is arranged on one side of the rotating ring (10); a second positioning hole (16) and a first positioning hole (15) which are used in conjunction with the bolt (9) are opened on one side of the connecting ring (12); when the bolt (9) is inserted into the second positioning hole (16), the rectangular hole (13) corresponds to the threaded hole (14); when the bolt (9) is inserted into the first positioning hole (15), the rectangular hole (13) and the threaded hole (14) are misaligned.

6. The box girder prestressed circulating pipeline grouting equipment according to claim 4 is characterized in that: The outer wall fixing sleeve of the installation tube (4) is provided with a limiting ring (11) used in conjunction with the rotating ring (10) and is used to position the installation tube (4).

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