Fabricated slurry blocking device and bridge prefabricated pier stud base grouting construction method
The design of the prefabricated grout-blocking device solves the problems of poor adaptability and grout leakage of traditional templates, enabling efficient and low-cost construction of prefabricated bridge piers and ensuring the density of grouting and the strength of the connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-18
- Publication Date
- 2026-04-10
AI Technical Summary
In the construction of existing precast bridge piers, traditional formwork cannot flexibly adapt to different cross-sectional dimensions, resulting in low formwork turnover rate, high construction costs, and easy leakage and runoff of grout during the grouting process.
The prefabricated grout-blocking device includes adjustable first and second baffles, which are fixed to the foundation cap by bolts and form a sealed grouting space with elastic sealing strips, adapting to precast piers of different cross-sectional sizes.
This method achieves a sealed grouting space, preventing grout leakage, improving construction efficiency and quality, reducing labor costs, and decreasing reliance on skilled workers.
Smart Images
Figure CN121827230A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of bridge construction technology, specifically to a prefabricated grout-blocking device and a grouting construction method for precast bridge pier bases. Background Technology
[0002] With the rapid development of my country's transportation infrastructure construction, the demand for bridge engineering is increasing daily. To improve construction efficiency, ensure project quality, and reduce negative environmental impacts, prefabrication technology has been widely applied in the bridge industry. Among these technologies, the prefabrication of bridge piers, as key load-bearing components, has become the mainstream trend in the industry.
[0003] In the construction of precast piers, the quality of the connection between the pier and the foundation cap directly affects the safety and durability of the entire bridge structure. Currently, the commonly used method is the grouting method, which involves pre-installing grouting pipes on the foundation cap, and after the precast pier is hoisted, injecting high-strength grout into the gap between the bottom of the pier and the foundation cap under pressure to form a strong connection. However, the key to the success of this method lies in creating a sealed grouting space during the grouting process to prevent grout leakage and ensure that the grout is dense and fully filled.
[0004] In existing technologies, temporary formwork or simple baffles are often used to construct the grouting space around the bottom of the pier. However, these methods have some inherent defects. Traditional wooden or steel formwork is of fixed size and cannot be flexibly adapted to precast piers with different cross-sectional dimensions. It has low versatility, resulting in low formwork turnover rate and high construction cost. Gaps often exist at the joints between the simple baffles and the sides of the pier, as well as with the surface of the foundation. Under grouting pressure, grout leakage and runoff are likely to occur. Summary of the Invention
[0005] This invention provides a prefabricated grout-blocking device and a grouting construction method for precast bridge pier bases, which can overcome some or all the defects of the prior art.
[0006] According to an assembly-type grout-blocking device of the present invention, the device body includes: a device body, the device body including two parallel first baffle members and two parallel second baffle members, the two first baffle members and the two second baffle members together forming a grout-blocking interval for the precast pier column to pass through; both ends of the first baffle members and the second baffle members are provided with adjustment components, the adjustment components being used to adjust the size of the grout-blocking interval.
[0007] With this invention, when using the grout-blocking device, construction workers first place two second baffle pieces at the pre-drilled bolt holes on the foundation platform, aligning the bolt holes with the limiting holes on the second baffles. Then, bolts are inserted through the limiting holes to connect the two second baffle pieces to the foundation platform. After the two second baffle pieces are connected, two first baffle pieces are installed at both ends of the second baffle pieces. When installing the two first baffle pieces, the construction workers lift the first baffle, aligning the first sub-baffles at both ends of the first baffle with the second retaining plates at both ends of the second baffle. Then, the first retaining groove on the first retaining plate is inserted into the second retaining groove on the second retaining plate, thus fixing the two first baffle pieces at both ends of the second baffle. The first baffle and two second baffles together form a grout-blocking zone. Construction workers then use a crane to lift the precast pier and place it onto the foundation platform, passing it through the grout-blocking zone. After the pier is placed on the foundation platform, elastic sealing strips are placed between the two first baffles and the precast pier. These strips are then compressed by the first and second baffles, sealing the joint between the precast pier and the foundation platform. Grouting then begins from the bottom of the precast pier. When the grout rises to the joint, it is blocked by the grout-blocking device, sealing the joint and achieving a sealed grouting space. This effectively withstands the internal pressure generated during grouting, preventing grout leakage and ensuring full and dense grouting. When installing precast piers of different sizes, construction workers can adjust the snap-fit position of the second clamping plate and the first sub-baffle according to the size of the precast pier, and adjust the length of the two first baffle pieces and the two second baffle pieces, thereby adjusting the size of the grout-blocking zone so that the grout-blocking zone can adapt to precast piers of different cross-sectional sizes.
[0008] Preferably, the first baffle component includes a first baffle, and the second baffle component includes a second baffle; the adjusting assembly includes a first sub-baffle disposed at both ends of the first baffle, and a second sub-baffle disposed at both ends of the second baffle; the first sub-baffle includes a first locking plate disposed along the length direction of the first sub-baffle, and the lower end of the first locking plate is provided with a first locking groove spaced apart along the length direction of the first locking plate; the second sub-baffle includes a second locking plate disposed along the length direction of the second sub-baffle, and the upper end of the second locking plate is provided with a second locking groove spaced apart along the length direction of the second locking plate.
[0009] With this invention, construction workers can connect the second sub-baffle to the first sub-baffle and the first sub-baffle to the first baffle by welding. By adjusting the engagement of the first and second slots at different positions, the size of the grout-blocking zone can be effectively adjusted, thus making it convenient to adapt to precast piers with different cross-sectional sizes.
[0010] Preferably, the end of the first card plate away from the first card slot is provided with a plurality of limiting cavities corresponding to the position of the first card slot; the limiting cavities are connected to the bottom of the first card slot; and the limiting cavities are provided with a sealing block that extends into the first card slot and is used to seal the first card slot.
[0011] With this invention, when the corresponding second slot engages with the first slot, the second plate will push the sealing block in the corresponding first slot into the limiting cavity, while the sealing blocks in the other first slots will extend from the limiting cavity into the first slot due to their own weight, thereby sealing the first slot. This prevents the grout from squeezing the flexible sealing strip during the grouting process, causing the sealing strip to extend into the first slot, resulting in poor sealing at the joint and grout leakage.
[0012] Preferably, a sealing plate for sealing the limiting cavity is provided above the first card plate.
[0013] With this invention, when installing the first sub-baffle, the construction personnel first place the sealing block into the limiting cavity, and then weld the sealing plate above the first card plate to seal the opening of the limiting cavity and prevent the sealing block from falling out of the limiting cavity.
[0014] Preferably, the blocking block includes a stop block that extends into the first slot, and a limiting plate is provided on the side wall of one end of the stop block located in the limiting cavity.
[0015] With this invention, the width of the limiting cavity is greater than the width of the first slot. The stop block extends from the limiting cavity into the first slot, and the limiting plate is blocked by the bottom of the limiting cavity to prevent the stop block from leaving the limiting cavity.
[0016] Preferably, the cross-sections of the first baffle and the second baffle are L-shaped.
[0017] In this invention, both the first baffle and the second baffle are made of angle steel.
[0018] Preferably, a limiting hole is provided at the second baffle.
[0019] This invention makes it easier for construction workers to connect the second baffle to the foundation platform.
[0020] This invention provides a grouting construction method for precast bridge pier bases, implemented using a prefabricated grout-blocking device, with the following steps. S1: Construction Preparation First, the foundation cap is poured. After the foundation cap is poured, the measurement and layout are completed on the foundation cap to determine the installation position of the precast pier. Multiple grouting pipes are pre-embedded at the installation position. The outlet of the grouting pipe extends to the upper surface of the foundation cap. Bolt holes are drilled on both sides of the installation position of the precast pier. S2: Install grout-blocking device Two second baffles are placed at the bolt holes. Bolts are inserted into the bolt holes through the second baffles to connect the second baffles to the foundation cap. Then, the construction workers adjust the positions of the two first baffles at both ends of the second baffles by adjusting the components so that the grout blocking area conforms to the size of the precast pier column. S3: Lifting Piers The precast pier is hoisted to the installation position using lifting equipment, so that its bottom is located within the grout-blocking zone and rests on the foundation platform, wherein multiple vent holes are pre-set on the bottom side wall of the precast pier; S4: Grouting operation After the precast pier is hoisted, a sealing strip is wrapped around the joint between the precast pier and the foundation cap. The second baffle and the first baffle are pressed against the outer surface of the precast pier. Then, grout is injected into the sealed space formed by the grouting device, the bottom outer surface of the precast pier, and the surface of the foundation cap through the pre-embedded grouting pipe. The grout is injected from the grouting pipe outlet at the bottom of the space and fills from bottom to top until the grout vent hole continues to overflow. S5: Maintenance and Removal After grouting is completed, remove the grout-blocking device, clean the surface of the foundation cap, and carry out subsequent maintenance.
[0021] Through this invention, the device can hold the bridge pier, and in conjunction with the method of grouting from the bottom, it can completely expel the air, ensuring that the grouting is full and solid, making the connection between the precast pier and the foundation cap more solid. The device allows for flexible size adjustment and modular assembly, making installation faster than traditional formwork methods and significantly improving construction progress. Furthermore, its rapid assembly reduces reliance on skilled workers, allowing ordinary workers to operate it with minimal training, thus lowering labor costs.
[0022] Preferably, the vent is a short pipe pre-embedded in the side wall of the precast pier column, with its inner port connected to the sealed space and its outer port extending above the surface of the foundation and the top of the grout-blocking device.
[0023] By setting the vent at a high point, this invention ensures that all air can be completely expelled during grouting, thereby forming a full, dense, and defect-free structure inside.
[0024] Preferably, in step S1, the pre-embedded grouting pipes are arranged symmetrically along the installation outline of the precast pier column.
[0025] The present invention enables symmetrical arrangement of grouting pipes to ensure that grout is filled upwards uniformly and synchronously from multiple directions, leaving no dead corners. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the main body of the device in Example 1.
[0027] Figure 2 This is a schematic diagram of the second baffle component in Example 1.
[0028] Figure 3 This is a schematic diagram of the first baffle component in Example 1.
[0029] Figure 4 This is an exploded view of the first sub-baffle in Example 1.
[0030] Figure 5 This is a schematic diagram of the first card plate in Example 1.
[0031] Figure 6 This is a schematic diagram of the sealing block in Example 1.
[0032] Figure 7 This is a cross-sectional view of the first sub-baffle in Example 1. Detailed Implementation
[0033] To further understand the content of this invention, the invention will be described in detail with reference to the embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.
[0034] Example 1 like Figure 1-7 As shown, this embodiment provides a prefabricated grout-blocking device, characterized in that: it includes a device body 100, which includes two parallel first baffle members 110 and two parallel second baffle members 120. The two first baffle members 110 and the two second baffle members 120 together form a grout-blocking interval for the precast pier column to pass through; both ends of the first baffle members 110 and the second baffle members 120 are provided with adjustment components, which are used to adjust the size of the grout-blocking interval.
[0035] In this embodiment, when using the grout-blocking device, the construction worker first places two second baffle pieces 120 at the pre-drilled bolt holes on the foundation platform, aligning the bolt holes with the limiting holes 240 on the second baffle 210. Then, bolts are inserted through the limiting holes 240 and into the bolt holes, thus connecting the two second baffle pieces 120 to the foundation platform. After the two second baffle pieces 120 are connected and excavated, two first baffle pieces 110 are installed at both ends of the second baffle pieces 120. When installing the two first baffle pieces 110, the construction worker lifts the first baffle 310, aligning the first sub-baffles 320 at both ends of the first baffle 310 with the second retaining plates 230 at both ends of the second baffle 210. Then, the first retaining groove 450 on the first retaining plate 440 is inserted into the second retaining groove 220 on the second retaining plate 230, thereby securing the two first baffles. Component 110 is fixed to both ends of the second baffle component 120, so that the two first baffle components 110 and the two second baffle components 120 together form a grout-blocking zone. Then, the construction workers use a crane to lift the precast pier and place it on the foundation platform through the grout-blocking zone. After the precast pier is placed on the foundation platform, the construction workers place elastic sealing strips between the two first baffle components 110 and the two second baffle components 120 and the precast pier. The elastic sealing strips are squeezed by the first baffle components 110 and the second baffle components 120, thereby sealing the joint between the precast pier and the foundation platform. Then, grouting starts from the bottom of the precast pier. When the grout rises to the joint, it is blocked by the grout-blocking device to seal the joint, realizing the sealing of the grouting space. It can effectively withstand the internal pressure generated during grouting, avoid grout leakage, and thus ensure the fullness and density of the grouting. When installing precast piers of different sizes, construction workers can adjust the snap-fit position of the second clamping plate 230 and the first sub-baffle 320, and adjust the length of the two first baffle pieces 110 and the two second baffle pieces 120 according to the size of the precast pier, thereby adjusting the size of the grout-blocking zone so that the grout-blocking zone can adapt to precast piers of different cross-sectional sizes.
[0036] In this embodiment, the first baffle member 110 includes a first baffle 310, and the second baffle member 120 includes a second baffle 210; the adjustment assembly includes a first sub-baffle 320 disposed at both ends of the first baffle 310, and a second sub-baffle 250 disposed at both ends of the second baffle 210; the first sub-baffle 320 includes a first locking plate 440 disposed along the length direction of the first sub-baffle 320, and the lower end of the first locking plate 440 is provided with a first locking groove 450 spaced apart along the length direction of the first locking plate 440; the second sub-baffle 250 includes a second locking plate 230 disposed along the length direction of the second sub-baffle 250, and the upper end of the second locking plate 230 is provided with a second locking groove 220 spaced apart along the length direction of the second locking plate 230.
[0037] In this embodiment, construction workers connect the second sub-baffle 250 to the second baffle 210 by welding, and the first sub-baffle 320 to the first baffle 310. By adjusting the engagement of the first slot 450 and the second slot 220 at different positions, the size of the grout-blocking zone can be effectively adjusted, thereby facilitating the adaptation to precast piers with different cross-sectional sizes.
[0038] In this embodiment, the first card plate 440 is provided with a plurality of limiting cavities 430 at one end away from the first card slot 450, which are corresponding to the positions of the first card slot 450; the limiting cavity 430 is in communication with the bottom of the first card slot 450; a blocking block 420 is provided in the limiting cavity 430, which extends into the first card slot 450 and is used to block the first card slot 450.
[0039] In this embodiment, when the corresponding second slot 220 engages with the first slot 450, the second card plate 230 will push the sealing block 420 in the corresponding first slot 450 into the limiting cavity 430. Meanwhile, the sealing blocks 420 in other first slots 450 will extend from the limiting cavity 430 into the first slot 450 due to their own weight, thereby sealing the first slot 450. This prevents the grout from squeezing the flexible sealing strip during the grouting process, causing the sealing strip to extend into the first slot 450, resulting in poor sealing at the joint and grout leakage.
[0040] In this embodiment, a sealing plate 410 for sealing the limiting cavity 430 is provided above the first card plate 440.
[0041] In this embodiment, when the construction personnel install the first sub-baffle 320, they first place the sealing block 420 into the limiting cavity 430, and then weld the sealing plate 410 above the first clamping plate 440 to seal the opening of the limiting cavity 430 and prevent the sealing block 420 from falling out of the limiting cavity 430.
[0042] In this embodiment, the blocking block 420 includes a stop block 610 that extends into the first slot 450, and a limiting plate 620 is provided on one end side wall of the stop block 610 located in the limiting cavity 430.
[0043] In this embodiment, the width of the limiting cavity 430 is greater than the width of the first slot 450. The stop block 610 extends from the limiting cavity 430 into the first slot 450, and the limiting plate 620 is blocked by the bottom of the limiting cavity 430 to prevent the stop block 610 from leaving the limiting cavity 430.
[0044] In this embodiment, the cross-sections of the first baffle 310 and the second baffle 210 are L-shaped.
[0045] In this embodiment, both the first baffle 310 and the second baffle 210 are made of angle steel.
[0046] In this embodiment, a limiting hole 240 is provided at the second baffle 210.
[0047] This embodiment facilitates the connection of the second baffle 210 to the foundation platform by construction personnel.
[0048] This embodiment provides a grouting construction method for precast bridge pier bases, implemented using a prefabricated grout-blocking device. The steps are as follows. S1: Construction Preparation First, the foundation cap is poured. After the foundation cap is poured, the measurement and layout are completed on the foundation cap to determine the installation position of the precast pier. Multiple grouting pipes are pre-embedded at the installation position. The outlet of the grouting pipe extends to the upper surface of the foundation cap. Bolt holes are drilled on both sides of the installation position of the precast pier. S2: Install grout-blocking device Two second baffle pieces 120 are placed at the bolt holes. Bolts are inserted into the bolt holes through the second baffle pieces 120 to connect the second baffle pieces 120 to the foundation cap. Then, the construction workers adjust the positions of the two first baffle pieces 110 at both ends of the second baffle pieces 120 by adjusting the components so that the grout blocking area conforms to the size of the precast pier column. S3: Lifting Piers The precast pier is hoisted to the installation position using lifting equipment, so that its bottom is located within the grout-blocking zone and rests on the foundation platform, wherein multiple vent holes are pre-set on the bottom side wall of the precast pier; S4: Grouting operation After the precast pier is hoisted, a sealing strip is wrapped around the joint between the precast pier and the foundation cap. The second baffle 120 and the first baffle 110 are used to press the sealing strip onto the outer surface of the precast pier. Then, grout is injected into the sealed space formed by the grouting device, the bottom outer surface of the precast pier, and the surface of the foundation cap through the pre-embedded grouting pipe. The grout is injected from the grouting pipe outlet at the bottom of the space and fills from bottom to top until the grout vent hole continues to overflow. S5: Maintenance and Removal After grouting is completed, remove the grout-blocking device, clean the surface of the foundation cap, and carry out subsequent maintenance.
[0049] Through this embodiment, the device can hold the bridge pier, and in conjunction with the method of grouting from the bottom, it can completely expel the air, ensuring that the grouting is full and solid, making the connection between the precast pier and the foundation cap more solid. The device allows for flexible size adjustment and modular assembly, making installation faster than traditional formwork methods and significantly improving construction progress. Furthermore, its rapid assembly reduces reliance on skilled workers, allowing ordinary workers to operate it with minimal training, thus lowering labor costs.
[0050] In this embodiment, the vent is a short pipe pre-embedded in the side wall of the precast pier column, with its inner port connected to the sealed space and its outer port extending above the surface of the foundation platform and the top of the grout-blocking device.
[0051] By setting the vent at a high point in this embodiment, it is ensured that all air can be completely expelled during grouting, thereby forming a full, dense, and defect-free structure inside.
[0052] In this embodiment, in step S1, the pre-embedded grouting pipes are symmetrically arranged along the installation outline of the precast pier column.
[0053] In this embodiment, the symmetrical arrangement of grouting pipes ensures that the grout fills upwards uniformly and synchronously from multiple directions, leaving no dead corners.
[0054] It is readily understood that those skilled in the art can combine, split, or reorganize the embodiments provided in this application to obtain other embodiments, all of which do not exceed the protection scope of this application.
[0055] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the embodiments shown are only part of the embodiments of the present invention. The actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.
Claims
1. A prefabricated slurry-blocking device, characterized in that: The device includes a main body (100), which includes two parallel first baffles (110) and two parallel second baffles (120). The two first baffles (110) and the two second baffles (120) together form a grout-blocking zone through which the precast pier column passes. Both ends of the first baffles (110) and the second baffles (120) are provided with adjustment components, which are used to adjust the size of the grout-blocking zone.
2. The prefabricated slurry-blocking device according to claim 1, characterized in that: The first baffle (110) includes a first baffle (310), and the second baffle (120) includes a second baffle (210). The adjustment assembly includes a first sub-baffle (320) disposed at both ends of the first baffle (310) and a second sub-baffle (250) disposed at both ends of the second baffle (210). The first sub-baffle (320) includes a first locking plate (440) disposed along the length direction of the first sub-baffle (320), and the lower end of the first locking plate (440) is provided with a first locking groove (450) spaced apart along the length direction of the first locking plate (440). The second sub-baffle (250) includes a second locking plate (230) disposed along the length direction of the second sub-baffle (250), and the upper end of the second locking plate (230) is provided with a second locking groove (220) spaced apart along the length direction of the second locking plate (230).
3. The prefabricated slurry-blocking device according to claim 2, characterized in that: The first card plate (440) has a plurality of limiting cavities (430) at one end away from the first card slot (450) that correspond to the position of the first card slot (450); the limiting cavity (430) is connected to the bottom of the first card slot (450); the limiting cavity (430) is provided with a blocking block (420) that extends into the first card slot (450) and is used to block the first card slot (450).
4. The prefabricated slurry-blocking device according to claim 3, characterized in that: A sealing plate (410) for sealing the limiting cavity (430) is provided above the first card plate (440).
5. A prefabricated slurry-blocking device according to claim 3, characterized in that: The blocking block (420) includes a stop block (610) that extends into the first slot (450), and a limiting plate (620) is provided on one end side wall of the stop block (610) located in the limiting cavity (430).
6. The prefabricated slurry-blocking device according to claim 2, characterized in that: The cross-sections of the first baffle (310) and the second baffle (210) are L-shaped.
7. A prefabricated slurry-blocking device according to claim 6, characterized in that: A limiting hole (240) is provided at the second baffle (210).
8. A method for grouting construction of precast bridge pier bases, implemented by an assembled grout-blocking device as described in any one of claims 1-7, comprising the following steps: S1: Construction Preparation First, the foundation cap is poured. After the foundation cap is poured, the measurement and layout are completed on the foundation cap to determine the installation position of the precast pier. Multiple grouting pipes are pre-embedded at the installation position. The outlet of the grouting pipe extends to the upper surface of the foundation cap. Bolt holes are drilled on both sides of the installation position of the precast pier. S2: Install grout-blocking device Two second baffle pieces (120) are placed at the bolt holes. The second baffle pieces (120) are inserted into the bolt holes through the bolts and connected to the foundation platform. Then, the construction workers adjust the positions of the two first baffle pieces (110) at both ends of the second baffle piece (120) by adjusting the components so that the grout blocking area conforms to the size of the precast pier column. S3: Lifting Piers The precast pier is hoisted to the installation position using lifting equipment, so that its bottom is located within the grout-blocking zone and rests on the foundation platform, wherein multiple vent holes are pre-set on the bottom side wall of the precast pier; S4: Grouting operation After the precast pier is hoisted, a sealing strip is wrapped around the joint between the precast pier and the foundation cap. The second baffle (120) and the first baffle (110) are used to press the sealing strip onto the outer surface of the precast pier. Then, grout is injected into the sealed space formed by the grouting device, the bottom outer surface of the precast pier, and the surface of the foundation cap through the pre-embedded grouting pipe. The grout is injected from the grouting pipe outlet at the bottom of the space and fills from bottom to top until the grout vent hole continues to overflow. S5: Maintenance and Removal After grouting is completed, remove the grout-blocking device, clean the surface of the foundation cap, and carry out subsequent maintenance.
9. A method for grouting construction of precast bridge pier bases according to claim 8, characterized in that: The vent is a short pipe pre-embedded in the side wall of the precast pier column, with its inner port connected to the sealed space and its outer port extending above the surface of the foundation and the top of the grout-blocking device.
10. A method for grouting construction of precast bridge pier bases according to claim 8, characterized in that: In step S1, multiple pre-embedded grouting pipes are symmetrically arranged along the installation outline of the precast pier column.