Water conservancy project deep foundation pit recyclable steel support structure

Abstract

The utility model relates to the technical field of deep foundation pit engineering discloses a kind of recyclable steel support structure of water conservancy deep foundation pit, including outer tube, the flange is fixedly connected with outer tube front end, the bolt is threadedly connected with the inner side of flange, the flange outer side is fixedly connected with multiple inclined plate, the flange front end is fixedly connected with flexible cylinder, the outer tube and flexible cylinder inner side are slidably connected with multiple sliding blocks, the sliding block bottom side is fixedly connected with inner tube, the outer tube and flexible cylinder inner side are slidably connected in inner tube outer side, the flexible cylinder inner side is slidably connected with movable plate, the movable plate front side is fixedly connected with connecting plate, the connecting plate front side is equipped with link groove. In the utility model, through the telescopic coarse adjustment length of inner and outer tube, the front movable plate fine adjustment position is made, so that fixed plate is close to foundation pit wall, after locking, side pressure can be transmitted to outer tube, and adjustable, recyclable stable support is realized.

Description

Technical Field

[0001] This utility model relates to the field of deep foundation pit engineering technology, and in particular to a recyclable steel support structure for deep foundation pits in water conservancy projects. Background Technology

[0002] Currently, the mainstream rigid support structures for deep foundation pits in water conservancy projects are divided into reinforced concrete supports and traditional steel supports. Among them, reinforced concrete supports have the advantages of large overall rigidity, strong bearing capacity, and good lateral stability, and can be adapted to deep foundation pits and large water conservancy foundation pits with extremely poor geological conditions. However, they have the disadvantages of long construction period, non-recyclability, and high demolition risk.

[0003] The traditional steel support for deep foundation pits in water conservancy projects currently in use first relies on retaining structures such as sheet piles and underground continuous walls to form a barrier on the side walls of the foundation pit. Then, prefabricated steel support components such as H-beams or steel pipes are horizontally erected inside the foundation pit through flange bolts, welding, and other methods, with both ends firmly connected to the steel walers that are closely attached to the retaining structure.

[0004] While the traditional steel supports used in deep foundation pits of water conservancy projects can be recycled, they cannot adjust the length during splicing or quickly position and fix the movable heads. Therefore, a recyclable steel support structure for deep foundation pits in water conservancy projects is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a recyclable steel support structure for deep foundation pits in water conservancy projects, aiming to improve the problems in the existing technology where the length of spliced ​​steel supports cannot be quickly adjusted and the flexible head is difficult to position quickly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A recyclable steel support structure for deep foundation pits in water conservancy projects includes an outer cylinder, a flange fixedly connected to the front end of the outer cylinder, bolts threadedly connected to the inner side of the flange, multiple inclined plates fixedly connected to the outer side of the flange, a movable cylinder fixedly connected to the front end of the flange, multiple sliding blocks slidably connected to the inner sides of the outer cylinder and the movable cylinder, an inner cylinder fixedly connected to the bottom side of the sliding blocks, the outer cylinder and the inner side of the movable cylinder slidably connected to the outer side of the inner cylinder, and a movable plate slidably connected to the inner side of the movable cylinder. As a further description of the above technical solution: A connecting plate is fixedly connected to the front side of the movable plate, a connecting groove is provided on the front side of the connecting plate, a fixed plate is slidably connected to the front side of the connecting plate, and a connecting plate is fixedly connected to the rear side of the fixed plate. As a further description of the above technical solution: The outer cylinder and the flexible cylinder are provided with telescopic grooves on their inner sides, and the outer cylinder is provided with a rotating groove on its inner side; As a further description of the above technical solution: The outer side of the sliding block is slidably connected to the inner side of the telescopic groove, and the outer side of the sliding block is slidably connected to the inner side of the rotating groove; As a further description of the above technical solution: The connecting plate is slidably connected to the inner side of the connecting groove, and multiple supports are fixedly connected to the outer side of the connecting plate; As a further description of the above technical solution: A limiting plate is fixedly connected to the inner side of the kinetic cylinder, and a baffle is fixedly connected to the inner side of the kinetic cylinder. As a further description of the above technical solution: The outer cylinder is threaded with multiple fixing bolts on its outer side, and the sliding block is threaded to the bottom side of the fixing bolts on its outer side. As a further description of the above technical solution: A movable plate is slidably connected to the inner side of the baffle, and a locking block is slidably connected to the top side of the movable plate.

[0007] This utility model has the following beneficial effects: 1. In this utility model, the sliding block, the expansion groove, and the rotating groove work together to drive the inner cylinder to slide within the outer cylinder and the movable cylinder, thereby achieving the effect of flexible adjustment of the length of the support structure, adapting to deep foundation pit support scenarios of different depths and widths, and improving construction adaptability.

[0008] 2. In this utility model, the fitting structure of the connecting plate and the connecting groove drives the precise docking of the fixing plate and the connecting plate, thereby achieving a stable fit between the front end of the support structure and the side wall of the foundation pit, enhancing the overall stability of the support and reducing the risk of foundation pit collapse. Attached Figure Description

[0009] Figure 1 This is a three-dimensional schematic diagram of a recyclable steel support structure for deep foundation pits in water conservancy projects proposed in this utility model; Figure 2 This is a schematic diagram of the expansion joint of a recyclable steel support structure for deep foundation pits in water conservancy projects, as proposed in this utility model. Figure 3 This is a schematic diagram of the sliding block of a recyclable steel support structure for deep foundation pits in water conservancy projects proposed in this utility model; Figure 4 This is a schematic diagram of the movable cylinder of a recyclable steel support structure for deep foundation pits in water conservancy projects proposed in this utility model; Figure 5 This is a schematic diagram of the connecting plate of a recyclable steel support structure for deep foundation pits in water conservancy projects, as proposed in this utility model.

[0010] Legend: 1. Outer cylinder; 2. Flange; 3. Bolt; 4. Inclined plate; 5. Connecting cylinder; 6. Movable plate; 7. Support; 8. Connecting plate; 9. Fixing plate; 10. Fixing bolt; 11. Inner cylinder; 12. Baffle; 13. Limiting plate; 14. Locking block; 15. Connecting groove; 16. Rotating groove; 17. Telescopic groove; 18. Connecting plate; 19. Sliding block. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Reference Figures 1-3This utility model provides an embodiment of a recyclable steel support structure for deep foundation pits in water conservancy projects. The structure includes an outer cylinder 1, which is the main load-bearing component of the entire support structure, providing stable support for the sidewalls of the deep foundation pit. Made of steel, it enhances the overall strength and durability of the structure. A flange 2 is fixedly connected to the front end of the outer cylinder 1, connecting it to other components. This fixed connection ensures the stability of the connection between the outer cylinder 1 and subsequent components, allowing for better force transmission between components. Bolts 3 are threaded onto the inner side of the flange 2, tightly fixing it to other corresponding connecting parts to prevent loosening and enhance the overall integrity and stability of the support structure. Multiple inclined plates 4 are fixedly connected to the outer side of the flange 2, reinforcing it, distributing the pressure on the flange 2, preventing deformation due to excessive stress, and improving the bearing capacity of the flange 2. A movable cylinder 5 is fixedly connected to the front end of the flange 2, which is used to realize the support... One of the key components for adjusting the length of the support structure, it works with the outer cylinder 1 and the inner cylinder 11 to adjust the support length according to the actual size requirements of the deep foundation pit. Multiple sliding blocks 19 are slidably connected to the inner sides of both the outer cylinder 1 and the movable cylinder 5. When sliding inside the outer cylinder 1 and the movable cylinder 5, this reduces friction between the inner cylinder 11 and the outer cylinder 1 and the movable cylinder 5, making the expansion and contraction of the inner cylinder 11 smoother. The bottom side of the sliding block 19 is fixedly connected to the inner cylinder 11. Through its cooperation with the outer cylinder 1 and the movable cylinder 5, the length expansion and contraction of the entire support structure is achieved. The fixed connection to the bottom side of the sliding block 19 ensures that the inner cylinder 11 moves synchronously with the sliding block 19. The outer cylinder 1 and the inner side of the movable cylinder 5 are slidably connected to the outer side of the inner cylinder 11, providing space and path for the expansion and contraction of the inner cylinder 11. This allows the support structure to change its length according to actual needs and adapt to different pit widths. The movable cylinder 5 is slidably connected to the inner side of the movable cylinder 5. The movable plate 6 can be slidably adjusted inside the movable cylinder 5 to further adjust the position of the front end of the support structure, so that the support structure can fit more closely to the stress surface of the deep pit and improve the support effect.

[0013] Reference Figures 4-5 A connecting plate 8 is fixedly connected to the front side of the movable plate 6. The connecting plate 8 connects the movable plate 6 and the fixed plate 9. The fixed connection ensures that the force transmitted by the movable plate 6 is stably transmitted to the fixed plate 9. A connecting groove 15 is provided on the front side of the connecting plate 8. The connecting groove 15 provides space for the installation and sliding of the connecting plate 18, so that the connecting plate 18 can smoothly cooperate with the connecting plate 8 to realize the sliding connection between the connecting plate 8 and the fixed plate 9. The fixed plate 9 is slidably connected to the front side of the connecting plate 8. The fixed plate 9 is in direct contact with the side wall of the deep foundation pit or other load-bearing structures. The sliding connection method allows for easy adjustment of the position of the fixed plate 9 according to the actual situation, ensuring that it is tightly fitted with the load-bearing surface. A connecting plate 18 is fixedly connected to the rear side of the fixed plate 9. The connecting plate 18 cooperates with the connecting groove 15 to ensure the sliding connection between the fixed plate 9 and the connecting plate 8, and to prevent them from separating. At the same time, it transmits the force on the fixed plate 9 to the connecting plate 8.

[0014] Reference Figures 1-5 The outer cylinder 1 and the movable cylinder 5 have expansion grooves 17 on their inner sides, allowing the sliding block 19 to slide stably along the expansion grooves 17, thereby driving the inner cylinder 11 to extend and retract smoothly, ensuring the reliability of the support structure length adjustment. The outer cylinder 1 has a rotating groove 16 on its inner side, which allows for rotation at a certain angle during sliding, enabling the inner cylinder 11 to make small angle adjustments while extending and retracting, better adapting to the actual conditions of the foundation pit. The outer side of the sliding block 19 is slidably connected to the inner side of the expansion groove 17, allowing it to slide stably along the expansion groove 17, thereby driving the inner cylinder 11 to extend and retract smoothly, ensuring the reliability of the support structure length adjustment. The outer side of the sliding block 19 is slidably connected to the rotating groove 16. Inside the 6th section, the sliding block 19 can rotate at a certain angle when sliding within the rotating groove 16, allowing the inner cylinder 11 to make slight angle adjustments while extending and retracting, better adapting to the actual conditions of the foundation pit. The connecting plate 18 is slidably connected to the inner side of the connecting groove 15. This connection allows the connecting plate 18 to slide within the connecting groove 15, thereby driving the fixed plate 9 to move relative to the connecting plate 8, facilitating the adjustment of the position of the fixed plate 9 to fit the stress surface. Multiple supports 7 are fixedly connected to the outer side of the connecting plate 8. The supports 7 can enhance the structural strength of the connecting plate 8, distribute the pressure borne by the connecting plate 8, prevent the connecting plate 8 from being damaged due to excessive force, and extend its service life. The inner side of the movable cylinder 5 is fixedly connected to a limiting plate 13, which restricts the sliding range of the movable plate 6 within the movable cylinder 5, preventing the movable plate 6 from sliding excessively and detaching from the movable cylinder 5, thus ensuring the normal operation of the movable plate 6. A baffle 12 is fixedly connected to the inner side of the movable cylinder 5, which blocks and limits the sliding stroke of the movable plate 6, further restricting its travel. It also protects other components inside the movable cylinder 5. Multiple fixing bolts 10 are threadedly connected to the outer side of the outer cylinder 1. These fixing bolts 10 can be tightened or loosened via threaded connections. When tightened, they fix the position of the sliding block 19, thereby fixing the inner cylinder 11 and the outer cylinder 1. The relative position ensures the length of the support structure is fixed. The outer side of the sliding block 19 is threaded to the bottom side of the fixing bolt 10, which firmly fixes the sliding block 19 in the current position and prevents it from sliding during the support process. The inner side of the baffle 12 is slidably connected to the movable plate 6. The baffle 12 provides guidance and support for the sliding of the movable plate 6, ensuring that the movable plate 6 remains stable and does not deviate during the sliding process. The top side of the movable plate 6 is slidably connected to the locking block 14. The locking block 14 can slide on the top side of the movable plate 6. When the movable plate 6 is adjusted to the appropriate position, the sliding locking block 14 is locked into the corresponding position, which can fix the position of the movable plate 6 and prevent it from moving when subjected to force.

[0015] Working principle: First, adjust the overall length of the structure according to the width of the foundation pit and the support requirements. By pushing or pulling the inner cylinder 11, it slides along the expansion groove 17 on the inner side of the outer cylinder 1 and the movable cylinder 5, realizing the expansion and contraction of the main support section. The sliding block 19 slides in the expansion groove 17 and the rotating groove 16, which can ensure the smooth movement of the inner cylinder 11, while allowing it to undergo a small angle of deflection to adapt to the actual inclination angle or unevenness of the foundation pit sidewall. After the initial length adjustment, tighten the fixing bolt 10 on the outer side of the outer cylinder 1 so that its bottom end presses against the sliding block 19. The extension length of the inner cylinder 11 can be locked to ensure support stability. Subsequently, the movable plate 6 can slide inside the movable cylinder 5 to further adjust the position of the front support point. After adjustment, the locking block 14 on the top side of the movable plate 6 is slid to lock it into the limit position to prevent the movable plate 6 from shifting during use. The fixed plate 9 is slidably connected to the connecting groove 15 on the front side of the connecting plate 8 through the connecting plate 18. It can slide slightly along the connecting plate 8 so that the fixed plate 9 can fit tightly against the side wall of the foundation pit or other force-bearing surfaces, improving the support contact quality and force transmission efficiency.

[0016] During the support process, the external soil pressure and load are transmitted to the connecting plate 18 through the fixed plate 9, and then to the inner cylinder 11 and the outer cylinder 1 main structure through the connecting plate 8, the movable plate 6, and the movable cylinder 5. The flange 2 is firmly connected to other support components or foundation pit retaining structures through bolts 3. The inclined plate 4 around it can enhance the rigidity and deformation resistance of the flange 2. The entire structure is made of steel, which has high strength and durability, and can be disassembled and reused multiple times.

[0017] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing 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. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A recyclable steel support structure for deep foundation pits in water conservancy projects, comprising an outer cylinder (1), characterized in that: The outer cylinder (1) is fixedly connected to a flange (2) at its front end. The flange (2) is threaded with a bolt (3) on its inner side. Multiple inclined plates (4) are fixedly connected to the outer side of the flange (2). A movable cylinder (5) is fixedly connected to the front end of the flange (2). Multiple sliding blocks (19) are slidably connected to the inner sides of the outer cylinder (1) and the movable cylinder (5). An inner cylinder (11) is fixedly connected to the bottom side of the sliding block (19). The outer cylinder (1) and the movable cylinder (5) are slidably connected to the outer side of the inner cylinder (11). A movable plate (6) is slidably connected to the inner side of the movable cylinder (5).

2. The recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 1, characterized in that: The movable plate (6) is fixedly connected to the front side of the connecting plate (8), and the connecting plate (8) has a connecting groove (15) on the front side. The connecting plate (8) is slidably connected to the front side of the connecting plate (8), and the connecting plate (18) is fixedly connected to the rear side of the fixed plate (9).

3. The recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 1, characterized in that: The outer cylinder (1) and the movable cylinder (5) are provided with telescopic grooves (17) on their inner sides, and the outer cylinder (1) is provided with a rotating groove (16) on its inner side.

4. The recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 3, characterized in that: The outer side of the sliding block (19) is slidably connected to the inner side of the telescopic groove (17), and the outer side of the sliding block (19) is slidably connected to the inner side of the rotating groove (16).

5. A recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 2, characterized in that: The connecting plate (18) is slidably connected to the inside of the connecting groove (15), and multiple supports (7) are fixedly connected to the outside of the connecting plate (8).

6. A recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 1, characterized in that: The inner side of the flexible cylinder (5) is fixedly connected to a limiting plate (13), and the inner side of the flexible cylinder (5) is fixedly connected to a baffle (12).

7. A recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 1, characterized in that: The outer cylinder (1) is threaded with multiple fixing bolts (10) on its outer side, and the sliding block (19) is threaded to the bottom side of the fixing bolts (10) on its outer side.

8. A recyclable steel support structure for deep foundation pits in water conservancy projects according to claim 6, characterized in that: The baffle (12) is slidably connected to a movable plate (6) on its inner side, and a locking block (14) is slidably connected to the top side of the movable plate (6).

Images