Assembly type bridge prefabricated bent cap circulating grouting device and method

Abstract

The application relates to an assembled bridge prefabricated cap beam circulating grouting device and method. The device comprises a grouting mechanism and a circulating grouting mechanism. The grouting mechanism comprises a grouting machine which is provided with a grout outlet and a grout return outlet. The circulating grouting mechanism comprises a plurality of grouting units. Each grouting unit comprises a blocking cover, a hose and a hard pipe. The blocking cover is provided with a hard pipe opening and a hose opening. One end of the hose is fixed to the top surface of the blocking cover and is communicated with the hose opening. One end of the hard pipe is fixed to the bottom surface of the blocking cover and is communicated with the hard pipe opening. When the blocking cover is arranged at the bellows opening of the prefabricated cap beam, the hard pipe is located in the bellows. The hard pipe opening and the hose opening of the head and tail grouting units are connected with the grout outlet and the grout return outlet of the grouting machine. The other ends of the hoses of the other grouting units are connected with the hard pipe openings of the connected grouting units in sequence. The application has the advantages of novel design, simple operation, no grout overflow in the whole grouting process and grout compaction.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, and in particular to a circulating grouting device and method for prefabricated bridge cap beams. Background Technology

[0002] The grouting process for precast cap beams has strict requirements. Substandard grouting quality can lead to weak structural connections and a reduced lifespan. Currently, precast cap beam grouting often uses single-hole injection. This method results in significant material waste and inconsistent quality. Furthermore, the small volume of each hole causes substantial overflow with each pumping operation, leading to significant material loss and environmental pollution. Additionally, the low height of each hole makes it difficult to ensure the grout is dense during the grouting process. Summary of the Invention

[0003] This application provides a circulating grouting device and method for prefabricated bridge cap beams to solve the technical problems in the related art where grout overflows during the grouting process of prefabricated cap beams, causing material loss and environmental pollution, and the short distance between the corrugated pipe opening of the prefabricated cap beam and the grouting machine results in insufficient compaction of the grout, leading to poor grouting quality.

[0004] In a first aspect, this application provides a circulating grouting device for precast bridge cap beams, including a grouting mechanism and a circulating grouting mechanism. The grouting mechanism includes a grouting machine with a grout outlet and a grout return outlet. The circulating grouting mechanism includes multiple grouting units, each including a sealing cap, a flexible hose, and a rigid pipe. The sealing cap has a rigid pipe opening and a flexible hose opening. One end of the flexible hose is fixed to the top surface of the sealing cap and communicates with the flexible hose opening. One end of the rigid pipe is fixed to the bottom surface of the sealing cap and communicates with the rigid pipe opening. When the sealing cap is placed over the corrugated pipe opening of the precast cap beam, the rigid pipe is located inside the corrugated pipe. One rigid pipe opening and one flexible hose opening of the multiple grouting units are respectively connected to the grout outlet and the grout return outlet of the grouting machine. Other grouting units are connected in series by connecting the other end of the flexible hose to the rigid pipe opening of the connected grouting unit.

[0005] In some embodiments, the diameter of the rigid tubing is not greater than the diameter of the flexible tubing.

[0006] In some embodiments, the length of the rigid pipe is less than the length of the precast corrugated pipe of the cap beam.

[0007] In some embodiments, the line connecting the rigid and flexible openings of a single grouting unit is located symmetrically about the center of the circular sealing cap along its radial direction.

[0008] In some embodiments, the sealing cap is interference-fitted or transition-fitted to the inlet of the precast corrugated pipe.

[0009] In some embodiments, when the corrugated pipe openings of the precast cap beam are distributed in a ring, the line connecting the rigid pipe opening and the flexible pipe opening of a single precast grouting unit is located on the tangent of the arc of the precast cap beam corrugated pipe opening corresponding to the grouting unit and the openings of two adjacent corrugated pipes.

[0010] In some embodiments, the rigid pipe and the rigid pipe port, the flexible pipe and the rigid pipe port, and the flexible pipe and the flexible pipe port are all sealed and connected in a continuous manner.

[0011] In some embodiments, the number of the plurality of grouting units is consistent with the number of precast cap beam corrugated pipe openings.

[0012] Secondly, this application provides a method for cyclic grouting of precast cap beams for assembled bridges, comprising the following steps:

[0013] Construct a circulating grouting circuit for a prefabricated bridge cap beam circulating grouting device;

[0014] Turn on the grouting machine to feed grout until the grouting part of the grouting machine returns grout. After maintaining pressure for the preset time, complete the grouting operation of all corrugated pipes of the precast cap beam.

[0015] Remove the grouting units from all the corrugated pipe openings of the precast cap beams.

[0016] In some embodiments, the step of constructing the circulating grouting circuit of the prefabricated bridge cap beam circulating grouting device specifically includes the following steps:

[0017] The rigid pipes of multiple grouting units are inserted one by one into the corrugated pipe openings of the precast cap beam, and the sealing caps are used to seal the corresponding corrugated pipe openings.

[0018] Connect the rigid pipe and flexible pipe of the first and last two grouting units of the multiple grouting units to the grout outlet and grout return outlet of the grouting machine, respectively.

[0019] Connect one flexible hose from another grouting unit to the rigid pipe of another grouting unit in series.

[0020] The beneficial effects of the technical solution provided in this application include:

[0021] This application provides a novel and easy-to-operate circulating grouting device for precast bridge cap beams. It consists of multiple grouting units connected in series, with the first and last connections to the grout outlet and return outlet of the grouting machine, forming a circulating grouting loop. This ensures that no grout overflows during the entire grouting process, avoiding material loss and environmental pollution. At the same time, the grouting loop formed by the series connection increases the grouting potential energy by combining the grouting resistance and the gravity of the grout, ensuring that the grout entering the corrugated holes of the final precast cap beam is densely grouted. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 The preliminary design structure for the precast cap beam of the assembled bridge before grouting;

[0024] Figure 2 for Figure 1 Top view;

[0025] Figure 3 A schematic diagram of the connection structure of the sealing cap, rigid pipe and flexible hose of the prefabricated bridge cap grouting device provided in the embodiments of this application;

[0026] Figure 4 for Figure 3 A top-down view;

[0027] Figure 5 A schematic diagram illustrating the installation of a grouting unit matched with a precast cap beam corrugated pipe, as provided in the embodiments of this application.

[0028] Figure 6 A schematic diagram of the overall structure of the prefabricated bridge cap beam circulating grouting device provided in the embodiments of this application;

[0029] Figure 7 This is a schematic diagram of the usage scenario of the prefabricated bridge cap beam circulating grouting device provided in the embodiments of this application after the sealing cover and hose are removed after grouting is completed.

[0030] In the picture:

[0031] 1. Grouting machine; 21. Sealing cap; 212. Rigid pipe opening; 213. Flexible hose opening; 22. Rigid pipe fitting; 23. Flexible hose; Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] like Figure 1-2As shown, this is the prototype design structure of the precast cap beam to be grouted. It is equipped with multiple corrugated pipes. The existing cap beam grouting method is to grout by connecting a grouting machine 1 to a single corrugated pipe opening. This grouting method has a short grouting stroke, the grout is not dense enough, and after the corrugated pipe is filled, the grout is prone to overflow, causing material loss and environmental pollution.

[0034] In view of this, the present application provides a circulating grouting device for prefabricated bridge cap beams, which can solve the technical problems of grout overflow and insufficient grout density caused by short grouting distance when grouting single holes of existing prefabricated cap beams.

[0035] Firstly, please refer to Figure 3-6 This application provides a circulating grouting device for precast bridge cap beams, including a grouting mechanism and a circulating grouting mechanism. The grouting mechanism includes a grouting machine 1, which has a grout outlet and a grout return outlet. The circulating grouting mechanism includes multiple grouting units, each grouting unit including a sealing cap 21, a flexible hose 23, and a rigid pipe 22. The sealing cap 21 has a rigid pipe opening 212 and a flexible hose opening 213. One end of the flexible hose 23 is fixed to the top surface of the sealing cap 21 and connected to the flexible hose opening 212. 13. One end of the rigid pipe 22 is fixed to the bottom surface of the sealing cap 21 and communicates with the rigid pipe opening 212. When the sealing cap 21 is placed on the corrugated pipe opening of the precast cap beam, the rigid pipe 22 is located inside the corrugated pipe. One rigid pipe opening 212 and one flexible pipe opening 213 of the multiple grouting units are respectively connected to the grout outlet and grout return outlet of the grouting machine 1. Other grouting units are connected in series by communicating with the rigid pipe opening 212 of the connected grouting unit through the other end of the flexible pipe 23.

[0036] This application provides a novel and easy-to-operate circulating grouting device for precast bridge cap beams. Multiple grouting units are connected in series, with the first and last connections to the outlet and return ports of the grouting machine 1, forming a circulating grouting loop. This ensures no grout overflow during the entire grouting process, avoiding material waste and environmental pollution. Simultaneously, through the series-connected grouting loop, multiple corrugated pipes are connected in series via rigid and flexible fittings to form the grouting loop. The combined gravity of the grout and the grouting resistance in the grouting loop increase the grouting potential energy, ensuring that the grout entering the corrugated holes of the final precast cap beam is densely grouted.

[0037] In one embodiment, the diameter of the rigid pipe 22 is not greater than the diameter of the flexible pipe 23 to ensure the density of the grout in the grouting unit of the lower section of the circulation pipeline.

[0038] In one embodiment, the length of the rigid pipe 22 is less than the length of the corrugated pipe of the precast cap beam. Preferably, the length of the rigid pipe 22 is 5cm-8cm shorter than the length of the corrugated pipe. The difference in length between the rigid pipe 22 and the corrugated pipe of the precast cap beam provides a return space after the corrugated pipe is filled with grout. Excess grout enters the rigid pipe port 212 of the next grouting unit through the return space via the hose port 213 and hose 23, and then enters the next corrugated pipe port for grouting. This process is repeated until all the corrugated pipes of the precast beam have been grouted.

[0039] In one embodiment, the sealing cap 21 is interference-fitted or transition-fitted to the opening of the precast corrugated pipe, which is used to improve the sealing connection between the sealing cap 21 and the precast corrugated pipe.

[0040] In one embodiment, when the corrugated pipe openings of the precast cap beam are distributed in a ring, the line connecting the rigid pipe opening 212 and the flexible pipe opening 213 of a single precast grouting unit is located on the tangent of the arc of the precast cap beam corrugated pipe opening corresponding to the grouting unit and the openings of two adjacent corrugated pipes, so as to realize that the grouting path between multiple corrugated pipe openings is consistent with the direction of multiple corrugated pipes, and avoids grouting blockage affecting the normal operation of the grouting circulation loop.

[0041] In one embodiment, the rigid pipe 22 and the rigid pipe opening 212, the flexible pipe 23 and the rigid pipe opening 212, and the flexible pipe 23 and the flexible pipe opening 213 are all sealed and connected in a continuous manner. The sealed and continuous connection means that the rigid pipe 22 and the rigid pipe opening 212 are connected and sealed with the edge of the rigid pipe opening 212, so as to achieve the technical effect of sealing the grouting circulation loop and preventing grout overflow.

[0042] In one embodiment, one end of the rigid pipe 22 is welded to the bottom surface of the sealing cap 21 and communicates with the rigid pipe opening 212. After the subsequent grouting is completed, the sealing cap 21 and the rigid pipe 22 are cut and separated from the corrugated pipe by means of oxygen cutting or plasma cutting.

[0043] In one embodiment, the number of the plurality of grouting units is consistent with the number of corrugated pipe openings of the precast cap beam, so as to realize multi-hole series grouting through all corrugated pipe openings (i.e. grouting holes) of the precast beam.

[0044] Secondly, this application provides a method for cyclic grouting of precast cap beams for assembled bridges, comprising the following steps:

[0045] Step S1: Construct the circulating grouting circuit of the prefabricated bridge cap beam circulating grouting device;

[0046] Step S2: Turn on the grouting machine 1 to feed grout until the grouting part of the grouting machine 1 returns grout. After the preset pressure holding time, complete the grouting operation of all corrugated pipes of the precast cap beam.

[0047] Step S3: Remove the grouting units from all the corrugated pipe openings of the precast cap beams.

[0048] In one embodiment, the step of constructing the circulating grouting circuit of the precast bridge cap beam circulating grouting device specifically includes the following steps:

[0049] Step S11: Insert the rigid pipes 22 of the multiple grouting units into the corrugated pipe openings of the precast cap beam one by one, and set the sealing caps 21 to the corresponding corrugated pipe openings.

[0050] Step S12: Connect the rigid pipe port 212 and flexible pipe port 213 of the first and last two grouting units of the multiple grouting units to the grout outlet and grout return port of the grouting machine 1, respectively.

[0051] Step S13: Connect one flexible hose 23 in another grouting unit to the rigid pipe port 212 of another grouting unit in series.

[0052] In one embodiment, the step of removing the grouting unit from all the precast cap beam corrugated pipe openings specifically includes the following steps:

[0053] like Figure 7 As shown, disconnect the connection between the hose 23 and the rigid pipe opening 212 of the adjacent grouting unit, and remove the sealing cap 21 and hose 23 of all grouting units from the corresponding precast cap beam corrugated pipe opening;

[0054] Cut and separate the sealing cap 21 and the rigid pipe 22, and leave the cut rigid pipe 22 inside the grouting corrugated pipe;

[0055] After cleaning and removing the hose 23 and the sealing cap 21, they can be reused.

[0056] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0057] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0058] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A circulating grouting device for prefabricated bridge cap beams, characterized in that, include: Grouting mechanism, including grouting machine, which is provided with grout outlet and grout return outlet; The circulating grouting mechanism includes multiple grouting units. Each grouting unit includes a sealing cap, a flexible hose, and a rigid pipe. The sealing cap has a rigid pipe opening and a flexible hose opening. One end of the flexible hose is fixed to the top surface of the sealing cap and communicates with the flexible hose opening. One end of the rigid pipe is fixed to the bottom surface of the sealing cap and communicates with the rigid pipe opening. When the sealing cap is placed over the corrugated pipe opening of the precast cap beam, the rigid pipe is located inside the corrugated pipe. One rigid pipe opening and one flexible hose opening of the multiple grouting units are respectively connected to the grout outlet and grout return outlet of the grouting machine. Other grouting units are connected in series by connecting the other end of the flexible hose to the rigid pipe opening of the connected grouting unit. When the corrugated pipe openings of the precast cap beam are arranged in a ring, the line connecting the rigid pipe opening and the flexible hose opening of a single precast grouting unit is located on the tangent line of the arc between the corrugated pipe opening of the precast cap beam corresponding to that grouting unit and the openings of two adjacent corrugated pipes.

2. The prefabricated bridge cap beam circulating grouting device as described in claim 1, characterized in that, The diameter of the rigid pipe is not greater than the diameter of the flexible pipe.

3. The prefabricated bridge cap beam circulating grouting device as described in claim 2, characterized in that, The length of the rigid pipe is less than the length of the precast corrugated pipe of the cap beam.

4. The prefabricated bridge cap beam circulating grouting device as described in claim 1, characterized in that, The line connecting the rigid and flexible openings of a single grouting unit is located symmetrically around the center of the circular sealing cap along its radial direction.

5. The prefabricated bridge cap beam circulating grouting device as described in claim 1, characterized in that, The sealing cover is fitted with an interference fit or a transition fit at the pipe opening of the precast corrugated pipe cap.

6. The prefabricated bridge cap beam circulating grouting device as described in claim 1, characterized in that, The rigid pipe and its port, the flexible pipe and its port, and the flexible pipe and its port are all sealed and connected in a continuous manner.

7. The prefabricated bridge cap beam circulating grouting device as described in claim 1, characterized in that, The number of the grouting units is the same as the number of the corrugated pipe openings of the precast cap beam.

8. A method for circulating grouting of precast cap beams for assembled bridges, characterized in that, Grouting using the prefabricated bridge cap beam circulating grouting device as described in claim 1 includes the following steps: A circulating grouting circuit for a precast bridge cap beam circulating grouting device is constructed; wherein, when the corrugated pipe openings of the precast cap beam are distributed in a ring, the position of a single grouting unit is adjusted so that the line connecting the rigid pipe opening and the flexible pipe opening of the grouting unit is located on the tangent line of the arc between the corrugated pipe opening of the precast cap beam corresponding to the grouting unit and the openings of two adjacent corrugated pipes. Turn on the grouting machine to feed grout until the grouting part of the grouting machine returns grout. After maintaining pressure for the preset time, complete the grouting operation of all corrugated pipes of the precast cap beam. Remove the grouting units from all the corrugated pipe openings of the precast cap beams.

9. The method for circulating grouting of precast bridge cap beams as described in claim 8, characterized in that, The steps for constructing the circulating grouting circuit of the precast bridge cap beam circulating grouting device specifically include the following steps: The rigid pipes of multiple grouting units are inserted one by one into the corrugated pipe openings of the precast cap beam, and the sealing caps are used to seal the corresponding corrugated pipe openings. Connect the rigid pipe and flexible pipe of the first and last two grouting units of the multiple grouting units to the grout outlet and grout return outlet of the grouting machine, respectively. Connect one flexible hose from another grouting unit to the rigid pipe of another grouting unit in series.

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