A grouting structure for repairing hollow areas in the base plate

Abstract

This utility model relates to a grouting structure for repairing hollow areas in a foundation slab. It includes a grouting pipe pre-embedded in the underside of a completed structural foundation slab. The grouting pipe is arranged along the hollow area, with one end extending into the uncast area of ​​the foundation slab as a grouting port, and the other end located inside the foundation slab. The grouting device also includes a ball valve for sealing the grouting port, which is connected to the grouting port end of the grouting pipe. This utility model effectively solves the problem of hollow areas in the foundation slab and, through optimizing the grouting process and device structure, achieves high efficiency, low cost, and high quality in the construction process, resulting in significant economic and social benefits.

Description

Technical Field

[0001] This utility model relates to the field of building construction, specifically a grouting structure for repairing hollow areas in the base plate. Background Technology

[0002] With the continuous development of construction engineering technology and the increasing diversification of building forms, the stability and safety of the foundation have become key factors in ensuring the overall quality of a building. However, in actual construction, due to uneven settlement of the foundation soil, improper construction techniques, and the influence of the surrounding environment, a disconnection and void phenomenon often occurs between the structural base slab and the foundation soil. This void phenomenon not only affects the load-bearing performance of the structure but may also lead to safety and quality accidents.

[0003] Currently, existing technologies have significant limitations in addressing hollow areas caused by foundation soil settlement, especially in the repair of hollow areas in building foundations. Traditional methods often require drilling holes in the foundation slab for grouting repair, which not only compromises the integrity of the foundation slab and increases the risk of leakage, but also leads to material waste and increased labor costs. Furthermore, traditional methods are inefficient, making it difficult to guarantee grouting quality and coverage, and thus cannot meet the demands of modern building engineering for efficient and high-quality construction. Utility Model Content

[0004] This utility model aims to overcome the defects of the prior art and provide a grouting structure for repairing hollow areas in the base plate, solving the problem of disconnection and hollow areas in the lower part of the cast-in-place structural base plate caused by the settlement of the foundation soil.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows: A grouting structure for repairing hollow areas in a base slab is characterized by comprising: a grouting pipe pre-embedded in the lower part of a cast-in-place structural base slab; the grouting pipe being arranged along the hollow area; one end of the grouting pipe extending to the uncast area of ​​the base slab as a grouting port; and the other end of the grouting pipe being located inside the base slab; the grouting device further comprises a ball valve for sealing the grouting port, the ball valve being connected to the grouting port end of the grouting pipe.

[0006] The grouting structure for repairing hollow areas in the base plate is characterized in that: the grouting pipe is a φ50 steel pipe, and one pipe is arranged every two meters along the hollow area.

[0007] The grouting structure for repairing hollow areas in the base plate is characterized in that a water-stop steel plate is added at the interface between the grouting pipe and the adjacent raft plate.

[0008] The grouting structure for repairing hollow areas in the base plate is characterized in that: the ball valve includes a valve body and a valve core, one end of the valve body is connected to the grouting port end of the grouting pipe, and the valve core is rotatably disposed in the valve body, so that the grouting port can be opened and closed by rotating the valve core.

[0009] The grouting structure for repairing hollow areas in the base plate is characterized in that the grouting pipe is sealed by welding after grouting is completed.

[0010] The grouting structure for repairing hollow areas in the base plate is characterized in that it further includes a ground-penetrating radar for real-time monitoring of the grouting process, wherein the ground-penetrating radar is capable of detecting the grouting filling status at the sinking position of the raft slab.

[0011] The grouting structure for repairing hollow areas in the base plate is characterized in that the water-cement ratio of the cement grout injected into the grouting pipe is 0.5 to 0.6, and the cement strength is 42.5.

[0012] The beneficial effects of this utility model are as follows: As can be seen from the above technical solution, this application provides a grouting structure for repairing hollow areas in the base slab. It utilizes a φ50 steel pipe pre-embedded in the bottom of the completed raft slab, with one steel pipe arranged every two meters along the hollow area. The grouting ports are located in the uncast area of ​​the base slab. This eliminates the need for drilling holes in the base slab and rework, allows for easy adjustment of the grouting method and sequence, and is simple and flexible to operate. It not only saves on material waste and labor for repairs but also improves construction efficiency and ensures timely completion of construction milestones. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of this application. Detailed Implementation

[0014] 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, not all, of the embodiments of this application. 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 claimed in this application.

[0015] like Figure 1 As shown: A grouting structure for repairing hollow areas in the base plate includes a grouting pipe 1 pre-embedded in the lower part of the cast-in-place structural base plate. The grouting pipe is arranged along the hollow area, with one end extending to the uncast base plate area as a grouting port 11, and the other end located inside the base plate. The grouting device also includes a ball valve for sealing the grouting port, which is connected to the grouting port end of the grouting pipe.

[0016] The grouting pipe is a φ50 steel pipe, and one pipe is arranged every two meters along the hollow area.

[0017] A water-stop steel plate 2 is added at the interface between the grouting pipe and the adjacent raft.

[0018] The ball valve includes a valve body and a valve core. One end of the valve body is connected to the grouting port end of the grouting pipe, and the valve core is rotatably disposed in the valve body. The grouting port is opened and closed by rotating the valve core.

[0019] The grouting pipe is sealed by welding after grouting is completed.

[0020] It also includes a ground-penetrating radar for real-time monitoring of the grouting process, which can detect the grouting filling status at the raft sinking location.

[0021] The water-cement ratio of the cement grout injected into the grouting pipe is 0.5 to 0.6, and the cement strength is 42.5.

[0022] During construction, settlement occurred in the foundation soil layer beneath the already poured raft slab, causing localized voids under the slab. The site decision was to fill these voids with cement grout. This invention provides a post-grouting method for filling these voids, with the specific construction method as follows: 1. Embed φ50 steel pipes at the bottom of the completed raft foundation, placing one pipe every two meters along the hollow areas. The grouting ports should be located in the un-poured areas of the foundation slab. After the entire foundation slab is poured, inject cement grout with a water-cement ratio of 0.5–0.6 and a cement strength of 42.5 through the embedded steel pipes. After grouting, weld the steel pipes to seal them. During construction, pay attention to water-stopping requirements; add water-stop steel plates at the interface with adjacent raft foundation sections to meet the requirements for preventing leakage.

[0023] 2. Ball valves are used to seal the grouting ports. One end of the ball valve is connected to the pre-embedded steel pipe, and the other end is used for grouting. During the grouting process, all valves are opened first, and grouting begins from one end. Once cement grout is exposed in the remaining grouting pipes, the valves are closed. Grouting continues until all grouting holes are completely closed. If any individual grouting hole fails to produce grout, that pipe is grouted separately.

[0024] 3. To ensure the grouting coverage and quality during construction, a ground-penetrating radar LTD-2100 will be used for real-time monitoring throughout the grouting process to ensure that the raft foundation sinking position is filled. If any other situations arise, the grouting method will be adjusted accordingly.

[0025] 4. After grouting is completed, the grouting holes should be sealed. Traditional methods for repairing hollow areas in the base slab typically require drilling holes in the slab for grouting. This not only compromises the structural integrity of the base slab but can also damage the waterproofing layer, leading to leaks. In contrast, this invention uses pre-embedded grouting pipes, eliminating the need for drilling holes in the base slab. This effectively avoids damage to the waterproofing layer, reducing the risk of leaks and extending the lifespan of the base slab.

[0026] This application eliminates the need for large-scale excavation and repair of the base slab during construction, avoiding the additional repair and reinforcement measures required for grouting, thus significantly reducing construction costs. Furthermore, the grouting process is simple to operate, and the grouting sequence and method can be flexibly adjusted according to actual conditions, greatly improving construction efficiency, shortening the construction cycle, and ensuring the smooth progress of construction milestones.

[0027] During the grouting process, ground-penetrating radar is used for real-time monitoring, which can accurately detect the grouting filling status at the raft slab settlement location. This allows construction personnel to promptly identify problems during the grouting process and adjust the grouting method according to the actual situation, ensuring the uniformity and compactness of the grout, thereby improving the grouting quality and further enhancing the bonding strength between the base slab and the foundation.

[0028] This application features a simple structure, primarily composed of pre-embedded grouting pipes, ball valves, and ground-penetrating radar. The connections between the components are clearly defined, facilitating construction and operation. The arrangement of the grouting pipes and the grouting process are easy to implement and can be flexibly adjusted according to different construction environments and void conditions, demonstrating strong applicability and operability.

[0029] The above are merely embodiments provided in this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A grouting structure for repairing hollow areas in the base plate, characterized in that: It includes a grouting pipe pre-embedded under the cast-in-place structural base slab, the grouting pipe being arranged along the hollow area, one end of the grouting pipe extending to the uncast base slab area as a grouting port, and the other end of the grouting pipe being located inside the base slab; the grouting structure also includes a ball valve for sealing the grouting port, the ball valve being connected to the grouting port end of the grouting pipe.

2. The grouting structure for repairing hollow areas in the base plate according to claim 1, characterized in that: The grouting pipe is a φ50 steel pipe, and one pipe is arranged every two meters along the hollow area.

3. The grouting structure for repairing hollow areas in the base plate according to claim 1, characterized in that: A water-stop steel plate is added at the interface between the grouting pipe and the adjacent raft.

4. The grouting structure for repairing hollow areas in the base plate according to claim 1, characterized in that: The ball valve includes a valve body and a valve core. One end of the valve body is connected to the grouting port end of the grouting pipe, and the valve core is rotatably disposed in the valve body. The grouting port is opened and closed by rotating the valve core.

5. A grouting structure for repairing hollow areas in a base plate according to claim 1, characterized in that: The grouting pipe is sealed by welding after grouting is completed.

6. The grouting structure for repairing hollow areas in the base plate according to claim 1, characterized in that: It also includes a ground-penetrating radar for real-time monitoring of the grouting process, which can detect the grouting filling status at the raft sinking location.

7. A grouting structure for repairing hollow areas in a base plate according to claim 1, characterized in that: The water-cement ratio of the cement grout injected into the grouting pipe is 0.5 to 0.6, and the cement strength is 42.5.

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