Self-locking lock for closing steel pipe pile cofferdam

Abstract

This utility model discloses a self-locking locking mechanism for the closure of a steel pipe pile cofferdam, comprising two C-shaped open steel pipe piles and two sets of steel pipe piles. An I-beam is positioned between the two C-shaped open steel pipe piles. Two inter-pile locking buckles are connected to the outer surface of each steel pipe pile. A connecting buckle identical to the inter-pile locking buckle is also connected to the outer surface of each C-shaped open steel pipe pile. Larssen steel sheet piles are also present on the outer surface of each steel pipe pile. This device, through the cooperation of the steel pipe piles, inter-pile locking buckles, Larssen steel sheet piles, and C-shaped open steel pipe piles, facilitates rapid connection. The cooperation of the spring, sliding rod, and sliding cylinder in the self-locking mechanism, combined with the precise positioning of the through holes in the Larssen steel sheet piles, ensures that the connection nodes are free of loosening gaps. Simultaneously, the rigid connection of the I-beams to the two C-shaped open steel pipe piles evenly distributes the load to the steel pipe piles on both sides, preventing deformation due to stress concentration in the closure section and improving the overall overturning resistance coefficient of the cofferdam.

Description

Technical Field

[0001] This utility model relates to the field of railway bridge engineering, and in particular to a self-locking locking buckle for the closure of steel pipe pile cofferdams. Background Technology

[0002] The main difference between building bridges in deep water and building bridges on land lies in the construction of the piers in the water. How to safely and effectively complete the construction of underwater structures in a complex underwater environment is the key to the success or failure of the entire bridge construction. Depending on the engineering environment and various construction factors, underwater cofferdam structures in deep water need to consider many factors such as structural safety, overall stability, water tightness, construction feasibility, environmental friendliness and economy of materials.

[0003] Conventional cofferdams include earth-rock cofferdams, sheet pile cofferdams, steel pipe pile cofferdams, and steel caisson cofferdams. In deep water conditions, steel pipe pile cofferdams and steel caisson cofferdams are generally used as auxiliary facilities for bridge substructure construction. However, the interlocking steel pipe pile and Larssen sheet pile combination system differs from the steel caisson cofferdam system. The steel caisson cofferdam system is fabricated and installed as a whole, while the interlocking steel pipe pile and Larssen sheet pile combination system requires on-site processing, on-site assembly, and on-site closure. However, the interlocking steel pipe pile and Larssen sheet pile lack a self-locking mechanism after connection, which affects the stability of the connection and is not conducive to current use. Therefore, we propose to solve the above problems by using a self-locking interlocking mechanism for the closure of the steel pipe pile cofferdam. Utility Model Content

[0004] The purpose of this invention is to provide a self-locking latch for the closure of steel pipe pile cofferdams, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The steel pipe pile cofferdam closure uses a self-locking locking mechanism, comprising two C-shaped open steel pipe piles and two sets of steel pipe piles. An I-beam is provided between the two C-shaped open steel pipe piles. Two inter-pile locking buckles are connected to the outer surface of each steel pipe pile. The outer surface of each C-shaped open steel pipe pile is connected with a connecting buckle identical to the inter-pile locking buckle. Larssen steel sheet piles are provided on the outer surface of each steel pipe pile. A self-locking mechanism is embedded on the outer surface of each inter-pile locking buckle.

[0007] In a further embodiment, each of the self-locking mechanisms includes a slide cylinder that is fitted into the inter-pile lock, each slide cylinder has a spring connected to its inner sidewall, and one end of each spring is connected to a slide rod.

[0008] In a further embodiment, each of the slide rods is located inside a slide cylinder, and each of the slide cylinders is slidably connected to the slide rod.

[0009] In a further embodiment, the two sets of steel pipe piles, Larssen sheet piles, and two C-shaped open steel pipe piles are connected by multiple inter-pile interlocking fasteners.

[0010] In a further embodiment, the interior of each of the C-shaped open steel pipe piles needs to be filled with a mixture of stone chips and sawdust.

[0011] In a further embodiment, each Larssen sheet pile has a through hole on its outer surface that is compatible with the sliding rod.

[0012] In a further embodiment, the two C-shaped open steel pipe piles are connected by an I-beam.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This device facilitates rapid connection through the cooperation of steel pipe piles, inter-pile interlocking, Larssen sheet piles, and C-shaped open steel pipe piles. The cooperation of springs, sliding rods, and sliding cylinders in the self-locking mechanism, along with the precise positioning of the through holes in the Larssen sheet piles, ensures that there are no loose gaps at the connection nodes. At the same time, the rigid connection of the I-beams to the two C-shaped open steel pipe piles evenly distributes the load to the steel pipe piles on both sides, preventing deformation due to stress concentration in the closure section and improving the overall overturning resistance coefficient of the cofferdam. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of the self-locking locking system used for the closure of a steel pipe pile cofferdam;

[0016] Figure 2 A top-view three-dimensional structural diagram of C-shaped open steel pipe piles with self-locking interlocking fasteners used for the closure of steel pipe pile cofferdams;

[0017] Figure 3 A top-view three-dimensional structural diagram of the self-locking steel pipe piles used for the closure of the steel pipe pile cofferdam;

[0018] Figure 4 A side view of the three-dimensional structure of the self-locking mechanism for the closure of a steel pipe pile cofferdam;

[0019] Figure 5 This is a side sectional view of the self-locking mechanism of the steel pipe pile cofferdam used for closure.

[0020] In the diagram: 1. Interlocking chain between piles; 2. Steel pipe pile; 3. Larssen sheet pile; 4. Self-locking mechanism; 401. Sliding cylinder; 402. Sliding rod; 403. Spring; 5. C-shaped open steel pipe pile; 6. I-beam. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-5 In this utility model, the self-locking buckle for closing the steel pipe pile cofferdam includes two C-shaped open steel pipe piles 5 and two sets of steel pipe piles 2. An I-beam 6 is provided between the two C-shaped open steel pipe piles 5. Two pile-to-pile locks 1 are connected to the outer surface of each steel pipe pile 2. The outer surface of each C-shaped open steel pipe pile 5 is connected to a connecting buckle that is the same as the pile-to-pile lock 1. Larssen sheet piles 3 are provided on the outer surface of each steel pipe pile 2. A self-locking mechanism 4 is embedded on the outer surface of each pile-to-pile lock 1.

[0023] Each self-locking mechanism 4 includes a sliding cylinder 401 embedded with the inter-pile locking buckle 1. A spring 403 is connected to the inner side wall of each sliding cylinder 401. A sliding rod 402 is connected to one end of each spring 403. By utilizing the cooperation of the spring 403, the sliding rod 402 and the sliding cylinder 401, combined with the precise positioning of the through hole of the Larssen steel sheet pile 3, it is ensured that there is no loose gap at the connection node. Each sliding rod 402 is located inside the sliding cylinder 401, and each sliding cylinder 401 is slidably connected to the sliding rod 402.

[0024] Two sets of steel pipe piles 2, Larssen sheet piles 3, and two C-shaped open steel pipe piles 5 are connected by multiple pile interlocking buckles 1. The interior of each C-shaped open steel pipe pile 5 needs to be filled with a mixture of stone chips and sawdust. The filling of stone chips and sawdust mixture ensures that the gaps are filled tightly to prevent water leakage. The outer surface of each Larssen sheet pile 3 is provided with through holes that are compatible with sliding rods 402. The two C-shaped open steel pipe piles 5 are connected by I-beams 6. The rigid connection of the two C-shaped open steel pipe piles 5 by the I-beams 6 evenly transfers the load to the steel pipe piles 2 on both sides.

[0025] The working principle of this utility model is as follows:

[0026] Two sets of steel pipe piles 2, Larssen steel sheet piles 3 and two C-shaped open steel pipe piles 5 constitute the main frame of the cofferdam. Each component forms a closed structure through multiple pile interlocking buckles 1 and the same connecting buckles on the C-shaped open steel pipe piles 5. Among them, the two C-shaped open steel pipe piles 5 serve as key nodes for closure and are rigidly connected by I-beams 6 to ensure the structural strength of the closure section.

[0027] When the steel pipe pile 2 and the Larssen sheet pile 3 are connected through the inter-pile lock 1, the contact surface of the components presses the end of the sliding rod 402, causing the sliding rod 402 to slide along the inner wall of the sliding cylinder 401 and compress the spring 403. When the components are connected in place, the end of the sliding rod 402 is precisely aligned with the through hole of the Larssen sheet pile 3. The spring 403 releases its elastic potential energy, pushing the sliding rod 402 into the through hole to form a mechanical lock. This action does not require additional operation and achieves a self-locking effect of locking upon connection.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-locking locking buckle for closing steel pipe pile cofferdams, characterized in that: It includes two C-shaped open steel pipe piles (5) and two sets of steel pipe piles (2). An I-beam (6) is provided between the two C-shaped open steel pipe piles (5). Two inter-pile locks (1) are connected to the outer surface of each steel pipe pile (2). The same connecting buckle as the inter-pile lock (1) is connected to the outer surface of each C-shaped open steel pipe pile (5). Larssen steel sheet piles (3) are provided on the outer surface of each inter-pile lock (1). A self-locking mechanism (4) is embedded on the outer surface of each inter-pile lock (1).

2. The self-locking locking buckle for closing steel pipe pile cofferdams according to claim 1, characterized in that: Each of the self-locking mechanisms (4) includes a slide cylinder (401) that is embedded in the inter-pile latch (1), and a spring (403) is connected to the inner side wall of each slide cylinder (401), and a slide rod (402) is connected to one end of each spring (403).

3. The self-locking buckle for closing a steel pipe pile cofferdam according to claim 2, characterized in that: Each of the slide rods (402) is located inside a slide cylinder (401), and each of the slide cylinders (401) is slidably connected to the slide rod (402).

4. The self-locking locking buckle for closing steel pipe pile cofferdams according to claim 1, characterized in that: The two sets of steel pipe piles (2), Larssen sheet piles (3) and two C-type open steel pipe piles (5) are connected by multiple pile interlocking (1).

5. The self-locking locking buckle for closing steel pipe pile cofferdams according to claim 1, characterized in that: Each of the aforementioned C-type open steel pipe piles (5) needs to be filled with a mixture of stone chips and sawdust.

6. The self-locking locking buckle for closing steel pipe pile cofferdams according to claim 1, characterized in that: Each Larssen sheet pile (3) has a through hole on its outer surface that is compatible with the slide bar (402).

7. The self-locking locking buckle for closing steel pipe pile cofferdams according to claim 1, characterized in that: The two C-type open steel pipe piles (5) are connected by I-beams (6).

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