Modular cofferdam

Abstract

This utility model discloses a modular cofferdam in the field of water conservancy construction technology. The modular cofferdam includes support piles, baffles, support rods, and fixing devices. One end of the support pile has a slot along its extension direction for inserting the baffle, and the other end is used to insert into the riverbed. Both ends of the baffle are inserted into the slots of the support piles, and when the baffle is inserted into the support pile, there is a distance between the uppermost end of the baffle and the uppermost end of the support pile for the fixing device to assemble. The fixing device has a limit protrusion corresponding to the slot; in use, the fixing device is sleeved on the outside of the support pile. One end of the support rod is connected to the fixing device, and the other end is used to sink into the riverbed. By inserting prefabricated support piles into the riverbed, and inserting the baffle between the support piles during use, the fixing device is installed simultaneously to form an oblique support for the support rod. The construction method is highly efficient and convenient, with a very short construction period, strong impact resistance, and reusability.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy construction technology, specifically to a modular cofferdam. Background Technology

[0002] When constructing bridge foundations, wharf structures, or underwater tunnels in soft silty geological environments such as coastal areas, estuaries, and lakes, traditional cofferdams often face problems such as poor stability, low construction efficiency, and high costs. Soft silty strata have weak bearing capacity and are prone to flow, causing conventional cofferdams (such as steel sheet piles and earth-rock cofferdams) to easily deform, leak, or even collapse. In addition, the construction cycle is long, making it difficult to meet the requirements of modern engineering for speed, modularity, and environmental protection.

[0003] Traditional steel structure cofferdams have the following drawbacks: 1. Welded connections have low construction efficiency and are greatly restricted by the working environment; 2. Bolted connections require precise alignment, making underwater operations difficult; 3. Existing waterproof structures mostly rely on external sealing materials, resulting in poor durability; 4. The reuse rate of components after cofferdam dismantling is less than 40%; 5. In soft silt terrain, the supporting stability of the cofferdam structure is insufficient. Utility Model Content

[0004] To overcome the problems of low construction efficiency and poor support stability when applied to soft soil layers, this utility model provides a modular cofferdam.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] The modular cofferdam includes support piles, baffles, support rods, and fixing devices. One end of the support pile has a slot along its extension direction for inserting the baffle for assembly, and the other end is used to insert into the riverbed. Both ends of the baffle are inserted into the slots of the support piles, and when the baffle is inserted into the support piles, there is a distance between the uppermost end of the baffle and the uppermost end of the support pile for the fixing device to assemble. The fixing device has a limit protrusion corresponding to the slot. In use, the fixing device is sleeved on the outside of the support pile. One end of the support rod is connected to the fixing device, and the other end is used to sink into the riverbed.

[0007] In this application, prefabricated support piles are inserted into the riverbed. When in use, baffles are inserted between the support piles, and the installation of fixing devices simultaneously forms oblique support for the support rods. The construction method is highly efficient and convenient, with a very short construction period, strong impact resistance, and reusability. Through the fixing devices, the support piles are connected while the support rods are connected, which further improves the stability and bearing capacity of the cofferdam system without affecting the efficiency of cofferdam assembly.

[0008] In some embodiments, the support rod is configured to be telescopic and / or multi-segmented.

[0009] In some embodiments, the support rod is composed of multiple segments spliced ​​together, and compression springs are provided between the segments to achieve changes in the overall length of the support rod.

[0010] In some embodiments, the support rod comprises multiple segments, with sleeves fitted around the outer ends of two adjacent segments, and the adjacent ends of two adjacent segments connected by a compression spring. The upper support rod can push the lower support rod downward, causing the compression spring to deform.

[0011] In some embodiments, the support rod comprises multiple segments, with sleeves fitted around the outer ends of two adjacent segments. A compression spring is provided between the lower support rod and the sleeve end, and the upper support rod can push the lower support rod downward, causing the compression spring to deform.

[0012] In some embodiments, a retractable buckle is arranged on the outer periphery of the lower end of the upper support rod, and a corresponding mating groove is provided on the inner side of the sleeve. The buckle and the mating groove cooperate to provide resistance to restrict the axial movement of the support rod.

[0013] In some embodiments, when the snap-fit ​​and the mating groove are engaged, the compression spring is in a compressed state.

[0014] In some embodiments, the baffle is a steel plate.

[0015] In some embodiments, the slot is a nylon slide rail groove.

[0016] In some embodiments, the end of the support rod that is submerged in the riverbed is configured as a cone shape.

[0017] The beneficial effects of this utility model are:

[0018] By inserting prefabricated support piles into the riverbed, and inserting baffles between the support piles during use, the installation of fixing devices simultaneously forms oblique support for the support rods. This construction method is highly efficient and convenient, with an extremely short construction period, strong impact resistance, and reusability. Through the fixing devices, the support piles are connected while the support rods are connected, further improving the stability and bearing capacity of the cofferdam system without affecting the efficiency of cofferdam assembly. Attached Figure Description

[0019] Figure 1 A frontal schematic diagram of the application scenario of the modular cofferdam provided by this utility model;

[0020] Figure 2 A side view of the application scenario of the modular cofferdam provided by this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of the connection position between the middle support rod and the fixing device;

[0022] Figure 4 for Figure 2 Schematic diagram of the connection positions of adjacent support rods in the middle;

[0023] Figure 5 for Figure 1 Schematic diagram of the cross-section of the intermediate support pile;

[0024] Figure 6 for Figure 1 Cross-sectional schematic diagram of the fixing device in the middle;

[0025] Figure 7 A top-view schematic diagram illustrating the application scenario of the modular cofferdam provided by this utility model.

[0026] The markings in the diagram are: 1. Support pile; 11. Slot; 2. Fixing device; 21. Limiting protrusion; 3. Baffle; 4. Support rod; 5. Riverbed; 6. Mating groove; 7. Buckle; 8. Compression spring; 9. Sleeve. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] like Figure 1-7 As shown, this utility model provides a modular cofferdam.

[0030] Combination Figure 1 , Figure 2 and Figure 7 As shown, the modular cofferdam includes support piles 1, baffles 3, support rods 4, and fixing devices 2. One end of the support pile 1 has a slot 11 along its extension direction for inserting the baffles 3 into the assembly, and the other end is used to insert into the riverbed 5. Both ends of the baffles 3 are inserted into the slots 11 of the support piles 1, and when the baffles 3 are inserted into the support piles 1, there is a distance between the uppermost end of the baffles 3 and the uppermost end of the support piles 1 for the fixing devices 2 to assemble. The fixing devices 2 are provided with limit protrusions 21 corresponding to the slots 11. In use, the fixing devices 2 are sleeved on the outside of the support piles 1. One end of the support rod 4 is connected to the fixing devices 2, and the other end is used to sink into the riverbed 5.

[0031] In this application, prefabricated support piles 1 are inserted into the riverbed 5. When in use, baffles 3 are inserted between the support piles 1. The installation of fixing device 2 forms a support rod 4 for oblique support. The construction method is efficient and convenient, with a very short construction period, strong impact resistance, and reusability. Through fixing device 2, the support piles 1 are connected to the support rod 4 at the same time, which further improves the stability and bearing capacity of the cofferdam system without affecting the assembly efficiency of the cofferdam.

[0032] The connection between the support rod 4 and the fixing device 2 can take many forms, such as rotatable or fixed, and no specific limitation is made here. (Refer to...) Figure 3 In this embodiment, one end of the support rod 4 is connected to the fixing device 2 via a ball joint to enable rotation, which facilitates the other end of the support rod 4 to be adaptively fixed to the riverbed 5, and the end of the support rod 4 connected to the fixing device 2 can be fixed with bolts.

[0033] Furthermore, the support rod 4 is configured to be telescopic and / or multi-segmented.

[0034] When the support rod 4 is configured as a multi-segment splicing, the length of the support rod 4 can be adjusted according to the terrain, which further facilitates transportation and implementation.

[0035] When the support rod 4 is configured to be telescopic, the length of the support rod 4 can be adjusted adaptively. In practice, under extreme water flow impact conditions, the length of the support rod 4 can be adjusted adaptively, and the support pile 1 and the baffle 3 can tilt to a certain extent to cope with extreme water flow impact conditions.

[0036] In this embodiment, the support rod 4 is composed of multiple segments spliced ​​together, and compression springs 8 are provided between the segments to achieve the change of the overall length of the support rod 4.

[0037] Combination Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the support rod 4 comprises multiple segments, and a sleeve 9 is sleeved on the outer side of the adjacent ends of two segments. A compression spring 8 is provided between the lower support rod 4 and the end of the sleeve 9. The upper support rod 4 can push the lower support rod 4 downward, causing the compression spring 8 to deform.

[0038] In this embodiment, a compression spring 8 is provided between the lower end face of the sleeve 9 and the upper end face of the support rod 4, such as... Figure 4 As shown, among the adjacent support rods 4, the upper support rod 4 can abut against the lower support rod 4 and push the lower support rod 4 downward, thus compressing the spring 8 and shortening the overall length of the support rod 4.

[0039] In some other embodiments, adjacent support rods 4 can be connected by compression springs 8. Specifically, the support rod 4 comprises multiple segments, with sleeves 9 sleeved on the outer sides of adjacent segments that are close to each other, and the adjacent ends of adjacent segments are connected by compression springs 8. The upper support rod 4 can push the lower support rod 4 downward, causing the compression springs 8 to deform.

[0040] Obviously, the movement of the support rod 4 relative to the sleeve 9 can also be limited by setting a limiting element on the outer periphery of the support rod 4.

[0041] Furthermore, a retractable buckle 7 is arranged on the outer periphery of the lower end of the upper support rod 4, and a corresponding mating groove 6 is opened on the inner side of the sleeve 9. The buckle 7 and the mating groove 6 cooperate to provide resistance to restrict the axial movement of the support rod 4.

[0042] In this embodiment, when the buckle 7 and the mating groove 6 are engaged, the compression spring 8 is in a compressed state.

[0043] The addition of the snap-fit ​​7 and the mating groove 6, as described above, enhances the overall stability of the device. (Refer to...) Figure 4 As shown in the diagram, the latch 7 on the left support rod 4 (the upper support rod 4) is in the retracted state, abutting against the inner wall of the sleeve 9. As the left support rod 4 moves to the right, the compression spring 8 is compressed, and the left support rod 4 moves to the right. The latch 7 on the left support rod 4 can then align with the mating groove 6 inside the sleeve 9, extending outward to achieve engagement between the latch 7 and the mating groove 6. The extension and retraction of the latch 7 can be achieved using elastic elements such as springs.

[0044] In this embodiment, the baffle 3 is a corrugated steel plate. High-strength corrugated steel plates are used for splicing installation, and the plates are guided and positioned by the pre-reserved slots 11 on the support piles 1, enabling rapid installation. Furthermore, the prefabricated steel plates can be selected in various sizes as needed, making them convenient and quick to adapt to different situations. Obviously, in practice, other materials that meet the load-bearing requirements can also be used.

[0045] In this embodiment, the slot 11 is a nylon slide rail with good wear resistance, preventing the presence of silt in the water from causing assembly failure and increasing the reusability of the device. Furthermore, the slide rail slot can fill the gap between the support pile 1 and the steel plate, greatly improving the seepage prevention effect of the cofferdam system and facilitating cofferdam construction and dismantling.

[0046] Furthermore, multiple slots 11 are evenly formed in the circumferential direction of the support pile 1, as shown in this embodiment. Figure 5 As shown, four card slots 11 are evenly spaced, as follows: Figure 6 As shown, the limiting protrusions 21 inside the fixing device 2 are correspondingly set to balance the force and ensure a smooth assembly process.

[0047] In practice, the fixing device 2 can be fixed to the support pile 1 with the reserved bolts.

[0048] When multiple slots 11 are evenly opened in the circumferential direction of the support pile 1, it is easier to realize cofferdam structures of different shapes by arranging the support pile 1. For example Figure 1 The example shown is a straight cofferdam. It is obvious that the support piles 1 in this embodiment facilitate the creation of a square cofferdam. The slots 11 can also be adaptively created according to other desired cofferdam shapes.

[0049] The slot 11 in the figure can be implemented to extend downwards beyond the riverbed 5 by a considerable distance to increase the contact area between the support pile 1 and the surrounding area, thereby improving the bearing capacity and stability of the pile.

[0050] In some embodiments, the end of the support rod 4 that is submerged in the riverbed 5 is configured in a conical shape. This facilitates insertion into the riverbed 5 and allows for adaptive changes in the position of the support rod 4 when the water flow force is large.

[0051] Specifically, in the face of extreme water flow impact, if the steel plate cofferdam tilts, the water flow impact force can be transmitted to the compression spring 8 through the internal connection of the support rod 4, thereby pushing the end of the support rod 4 (the end that sinks into the riverbed 5) to further penetrate and embed itself into the riverbed 5, so as to increase the support force of the support rod 4 on the steel plate cofferdam.

[0052] In practice, multiple prefabricated support piles 1 are first driven into the riverbed 5 in an arrangement. Corrugated steel plates can be quickly installed through the reserved slots 11. Then, the fixing device 2 is fitted onto the support piles 1 through the slots 11, and the support rods 4 are installed to achieve the rapid construction of the cofferdam.

[0053] The application scenarios of this application include, but are not limited to, the following: 1. Construction of bridge foundations across the sea / river: providing a dry working environment for abutments or piers in deep water silt areas; 2. Port and waterway expansion: quickly constructing temporary water-retaining structures to reduce the impact of silt excavation on waterways; 3. Environmentally sensitive area projects: modular assembly reduces disturbance to soft soil layers and lowers the risk of ecological damage.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 modular cofferdam, characterized by: It includes a support pile (1), a baffle (3), a support rod (4) and a fixing device (2). One end of the support pile (1) is provided with a slot (11) for the baffle (3) to be inserted and assembled along the extension direction, and the other end is used to insert into the riverbed (5). Both ends of the baffle (3) are inserted into the slots (11) of the support pile (1), and when the baffle (3) is inserted into the support pile (1), there is a distance between the uppermost end of the baffle (3) and the uppermost end of the support pile (1) for the mounting of the fixing device (2). The fixing device (2) is provided with a limiting protrusion (21) corresponding to the slot (11). When in use, the fixing device (2) is sleeved on the outside of the support pile (1). One end of the support rod (4) is connected to the fixing device (2), and the other end is used to sink into the riverbed (5).

2. The modular cofferdam of claim 1, wherein: The support rod (4) is configured to be telescopic and / or multi-segmented.

3. The modular cofferdam of claim 2, wherein: The support rod (4) is made up of multiple segments, and compression springs (8) are provided between the segments to achieve the change of the overall length of the support rod (4).

4. The modular cofferdam of claim 3, wherein: The support rod (4) consists of multiple segments. The adjacent ends of two segments are fitted with sleeves (9), and the adjacent ends are connected by compression springs (8). The upper support rod (4) can push the lower support rod (4) downward, causing the compression springs (8) to deform.

5. The modular cofferdam of claim 3, wherein: The support rod (4) consists of multiple segments. A sleeve (9) is fitted around the ends of two adjacent segments. A compression spring (8) is provided between the lower support rod (4) and the sleeve (9). The upper support rod (4) can push the lower support rod (4) downward, causing the compression spring (8) to deform.

6. A modular cofferdam as claimed in any one of claims 4 or 5, characterised in that: The lower outer periphery of the support rod (4) located above is provided with a retractable buckle (7), and the inner side of the sleeve (9) is provided with a corresponding mating groove (6). The buckle (7) and the mating groove (6) cooperate to provide resistance to restrict the axial movement of the support rod (4).

7. The modular cofferdam of claim 6, wherein: When the buckle (7) and the mating groove (6) are engaged, the compression spring (8) is in a compressed state.

8. The modular cofferdam of claim 1, wherein: The baffle (3) is made of steel plate.

9. The modular cofferdam of claim 1, wherein: The slot (11) is a groove for a nylon slide rail.

10. The modular cofferdam of claim 1, wherein: The end of the support rod (4) that is submerged in the riverbed (5) is configured as a cone shape.

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