Dumbbell-shaped lock catch pile cofferdam for deep foundation pit construction

Abstract

The utility model discloses a dumbbell-shaped lock catch pile cofferdam for deep foundation pit construction, and relates to the technical field of cofferdams. The device comprises a plurality of dumbbell-shaped frames, the dumbbell-shaped frame comprises two C arc sections; straight line sections parallel to each other are connected between the two C arc sections; two connecting plates are symmetrically fixed between the two linear sections; reinforcing plates are connected between the connecting plates and the adjacent C arc sections and the linear sections; an outer frame is arranged on the periphery of the dumbbell-shaped frame; and a back cover is arranged on the bottom surface of the dumbbell-shaped frame. The cofferdam of the dumbbell-shaped frame is designed, the middle of the cofferdam is narrow, the two ends of the cofferdam are wide, the cofferdam is similar to the combination of two arcs, the shape enables the cofferdam to be higher in stability when resisting external force such as water flow impact and lateral soil pressure, meanwhile, compared with a rectangular frame, the dumbbell-shaped frame is larger in internal operation space, the two C-shaped arc section parts are only used as boundary beams and not used as diagonal bracings and inclined bracings, and the structure is simple. While the overall stability of the cofferdam is ensured, a larger and more convenient operation space can be brought.

Description

Technical Field

[0001] This utility model belongs to the field of cofferdam technology, and in particular relates to a "dumbbell-shaped" interlocking pile cofferdam for deep foundation pit construction. Background Technology

[0002] A cofferdam is a temporary retaining structure built in hydraulic engineering projects to construct permanent hydraulic facilities. Its function is to prevent water and soil from entering the construction site, allowing for drainage, excavation of the foundation pit, and construction of the structure. It is primarily used in hydraulic engineering structures and, unless part of a permanent building, is generally dismantled after use. The cofferdam's height is higher than the highest water level that may occur during the construction period.

[0003] Currently, rectangular cofferdams are commonly used in water conservancy construction projects. However, existing rectangular cofferdams have low stability when resisting external forces such as water flow impact and lateral earth pressure. At the same time, rectangular cofferdams require bracing and diagonal bracing, which consumes a large amount of materials and has a small working space, making them unsuitable for low-cost, high-stability, and large-space operations.

[0004] To address these issues, we provide a dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction. Utility Model Content

[0005] The purpose of this invention is to provide a dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction. By designing a dumbbell-shaped frame cofferdam, which is narrow in the middle and wide at both ends, resembling a combination of two circular arcs, this shape makes it more stable in resisting external forces such as water flow impact and lateral earth pressure. At the same time, the dumbbell-shaped frame provides a larger internal working space compared to a rectangular frame. The two C-curve sections only have edge beams, without supporting or diagonal bracing. While ensuring the overall stability of the cofferdam, it can provide a larger and more convenient working space. This solves the problems of low stability of existing rectangular cofferdams in resisting external forces such as water flow impact and lateral earth pressure, and the fact that rectangular cofferdams require supporting and diagonal bracing, resulting in large material consumption and small working space, which is not conducive to low-cost, high-stability, and large-space operations.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model is a "dumbbell-shaped" interlocking pile cofferdam for deep foundation pit construction, comprising several dumbbell-shaped frames evenly and parallelly arranged in the vertical direction; each dumbbell-shaped frame includes two C-arc segments; the openings of the two C-arc segments are arranged opposite each other; parallel straight lines connect the two C-arc segments; two connecting plates are symmetrically fixed between the two straight lines; the two connecting plates are respectively close to the two C-arc segments; reinforcing plates are connected between the connecting plates and adjacent C-arc segments and straight lines; an outer frame is provided on the outer periphery of the dumbbell-shaped frame; the inner side of the outer frame is in contact with the outer side of the dumbbell-shaped frame; and a bottom sealing is provided on the bottom surface of the dumbbell-shaped frame.

[0007] The present invention is further configured such that the C-segment includes several missing arc segments; each missing arc segment is connected and fixed in pairs by welding; the two ends of each missing arc segment are spliced ​​together to form the C-segment; and the two end missing arc segments are respectively welded and fixed to two connecting plates.

[0008] The present invention is further configured such that four reinforcing plates are provided on the connecting plate; the reinforcing plates are symmetrically distributed in pairs at both ends of the connecting plate; one end of the two reinforcing plates located at the same end of the connecting plate is fixedly connected to the side of the connecting plate, and the other end is fixedly connected to the end of the C-arc segment and the straight segment respectively.

[0009] The present invention is further configured such that a plurality of support plates are vertically and uniformly welded between adjacent C-arc segments, adjacent straight segments, adjacent connecting plates, and adjacent reinforcing plates; the two ends of the connecting plates are welded and fixed to the straight segments; and the two ends of the reinforcing plates are respectively welded and fixed to the connecting plates, the C-arc segments, and the straight segments.

[0010] The present invention is further configured such that the C-segment and the straight segment are both made of Q345B steel; the connecting plate, the reinforcing plate and the supporting plate are all made of I28a I-beams; and the bottom is made of C30 concrete.

[0011] The present invention is further configured such that the outer frame includes several steel pipes that are fitted together; a T-shaped groove is provided on the circumferential side of the steel pipe; two T-shaped slide rails are slidably arranged on the inner wall of the T-shaped groove; and a locking plate is fixed on the side of the T-shaped slide rail.

[0012] The present invention is further configured such that a plurality of plug-in rings are evenly fixed on the outer periphery of the dumbbell-shaped frame; and an L-shaped plug-in pipe that is plugged into and cooperates with the plug-in rings is fixed on the periphery of the steel pipe.

[0013] The present invention has the following beneficial effects: 1. The present invention designs a dumbbell-shaped cofferdam, which is narrow in the middle and wide at both ends, similar to a combination of two circular arcs. This shape makes it more stable in resisting external forces such as water flow impact and lateral earth pressure. At the same time, the dumbbell-shaped frame has a larger internal working space than the rectangular frame. The two C-arc sections are only made of side beams, without the support and diagonal bracing. While ensuring the overall stability of the cofferdam, it can bring a larger and more convenient working space.

[0014] 2. This utility model improves the connection strength between the outer frame and the dumbbell-shaped frame by setting an L-shaped insertion pipe on the steel pipe and inserting it into the insertion ring on the dumbbell-shaped frame. At the same time, the adjacent steel pipes are tightly connected by a snap-fit ​​plate, which improves the connection strength of the outer frame itself and further enhances the stability.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a dumbbell-shaped interlocking pile cofferdam used for deep foundation pit construction.

[0018] Figure 2 For the present utility model Figure 1 A schematic diagram of the explosion structure.

[0019] Figure 3 This is a schematic diagram of the dumbbell-shaped frame of this utility model.

[0020] Figure 4 This is a schematic diagram of the outer frame of this utility model.

[0021] Figure 5 For the present utility model Figure 4 Enlarged view of region A.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Dumbbell-shaped frame; 2. C-curve segment; 3. Straight segment; 4. Connecting plate; 5. Reinforcing plate; 6. Outer frame; 7. Bottom sealing; 8. Missing arc segment; 9. Support plate; 10. Steel pipe; 11. T-shaped slide groove; 12. T-shaped slide rail; 13. Clamping plate; 14. Insertion ring; 15. L-shaped insertion pipe. Detailed Implementation

[0024] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] For a specific implementation example, please refer to Implementation Example 1. Figure 1-5This utility model is a dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction, comprising several dumbbell-shaped frames 1 evenly and parallelly arranged in the vertical direction; the dumbbell-shaped frame 1 includes two C-arc segments 2; the openings of the two C-arc segments 2 are arranged opposite each other; parallel straight segments 3 connect the two C-arc segments 2; two connecting plates 4 are symmetrically fixed between the two straight segments 3; the two connecting plates 4 are respectively close to the two C-arc segments 2; reinforcing plates 5 are connected between the connecting plates 4 and the adjacent C-arc segments 2 and the straight segments 3; an outer frame 6 is provided on the outer periphery of the dumbbell-shaped frame 1; the inner side of the outer frame 6 is close to the outer side of the dumbbell-shaped frame 1; a bottom sealing 7 is provided on the bottom surface of the dumbbell-shaped frame 1.

[0026] The operation process of this embodiment is as follows: First, construct a dumbbell-shaped frame 1. Then, connect and fix two straight segments 3 to two C-arc segments 2 in sequence to form a basic dumbbell-shaped closed frame. Then, use a connecting plate 4 to connect the two straight segments 3 to improve the connection strength of the frame. Then, install a reinforcing plate 5 between the connecting plate 4 and the C-arc segment 2 or the straight segment 3 to further reinforce the frame. Construct multiple sets of dumbbell-shaped frames 1 in the vertical direction. Finally, surround the outside of the dumbbell-shaped frame 1 with an outer frame 6.

[0027] The dumbbell-shaped frame 1 is narrow in the middle and wide at both ends, similar to a combination of two arcs. This shape makes it more stable when resisting external forces such as water flow impact and lateral earth pressure. At the same time, the dumbbell-shaped frame 1 has a larger internal working space than the rectangular frame. The two C arc segments 2 are only used as side beams, without cross bracing or diagonal bracing. While ensuring the overall stability of the cofferdam, it can bring a larger and more convenient working space.

[0028] For a specific embodiment two, please refer to Figure 1-5 Based on the first specific embodiment, the C arc segment 2 includes several missing arc segments 8; each missing arc segment 8 is fixed by welding; the two ends of each missing arc segment 8 are spliced ​​together to form the C arc segment 2; the two end missing arc segments 8 are welded and fixed to the two connecting plates 4 respectively.

[0029] Specifically, there are four reinforcing plates 5 on the connecting plate 4; the reinforcing plates 5 are symmetrically distributed in pairs at both ends of the connecting plate 4; one end of the two reinforcing plates 5 located at the same end of the connecting plate 4 is fixedly connected to the side of the connecting plate 4, and the other end is fixedly connected to the end of arc segment 2 and straight segment 3 respectively.

[0030] Furthermore, several support plates 9 are vertically and uniformly welded between adjacent C-arc segments 2, adjacent straight segments 3, adjacent connecting plates 4, and adjacent reinforcing plates 5; the two ends of the connecting plates 4 are welded and fixed to the straight segments 3; the two ends of the reinforcing plates 5 are welded and fixed to the connecting plates 4, C-arc segments 2, and straight segments 3, respectively.

[0031] Furthermore, both arc segment 2 and straight segment 3 are made of Q345B steel; connecting plate 4, reinforcing plate 5 and supporting plate 9 are made of I28a I-beams; and bottom sealing 7 is made of C30 concrete.

[0032] Furthermore, the outer frame 6 includes several steel pipes 10 that fit together; T-shaped grooves 11 are provided on the sides of the steel pipes 10; two T-shaped slide rails 12 are slidably arranged on the inner wall of the T-shaped grooves 11; and locking plates 13 are fixed on the sides of the T-shaped slide rails 12.

[0033] Furthermore, several insertion rings 14 are evenly fixed on the outer periphery of the dumbbell-shaped frame 1; L-shaped insertion pipes 15 that are inserted and matched with the insertion rings 14 are fixed on the outer periphery of the steel pipe 10.

[0034] The operation process of this embodiment is as follows: When building the dumbbell-shaped frame 1, all the missing arc segments 8 are welded to form C arc segments 2, and C arc segments 2 are welded and fixed to the connecting segment 3. Finally, the connecting plate 4 and the reinforcing plate 5 are welded and fixed. Adjacent dumbbell-shaped frames 1 are welded and fixed to each other through the support plate 9, so that multiple sets of dumbbell-shaped frames 1 are evenly distributed in the vertical direction.

[0035] Then, insert the steel pipe 10. First, align the L-shaped insertion pipe 15 on the steel pipe 10 with the insertion ring 14 on the dumbbell-shaped frame 1. Then, place the steel pipe 10 downward so that the L-shaped insertion pipe 15 and the insertion ring 14 are inserted and engaged. Then, slide the locking plate 13 on the adjacent steel pipe 10 so that the two adjacent steel pipes 10 are connected through the locking plate 13, thus completing the construction of the outer frame 6.

[0036] In this embodiment, by setting an L-shaped insertion pipe 15 on the steel pipe 10 and inserting it into the insertion ring 14 on the dumbbell-shaped frame 1, the connection strength between the outer frame 6 and the dumbbell-shaped frame 1 is improved. At the same time, adjacent steel pipes 10 are tightly connected by a snap-fit ​​plate 13, which improves the connection strength of the outer frame 6 itself and further enhances stability.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction, comprising a plurality of dumbbell-shaped frames (1) uniformly and parallelly arranged in the vertical direction; characterized in that: The dumbbell-shaped frame (1) includes two C-shaped segments (2); the openings of the two C-shaped segments (2) are arranged opposite to each other; and parallel straight line segments (3) connect the two C-shaped segments (2). Two connecting plates (4) are symmetrically fixed between the two straight segments (3); the two connecting plates (4) are respectively close to the two C arc segments (2); the connecting plates (4) are connected to the adjacent C arc segments (2) and the straight segments (3) by reinforcing plates (5); The dumbbell-shaped frame (1) is provided with an outer frame (6) on its outer periphery; the inner side of the outer frame (6) is in contact with the outer side of the dumbbell-shaped frame (1); the bottom surface of the dumbbell-shaped frame (1) is provided with a sealing bottom (7).

2. The "dumbbell-shaped" interlocking pile cofferdam for deep foundation pit construction according to claim 1, characterized in that, The C-segment (2) includes several missing arc segments (8); each missing arc segment (8) is fixed by welding; the two ends of each missing arc segment (8) are spliced ​​together to form the C-segment (2); the two ends of the missing arc segment (8) are welded and fixed to the two connecting plates (4) respectively.

3. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction according to claim 2, characterized in that, Four reinforcing plates (5) are provided on the connecting plate (4); the reinforcing plates (5) are symmetrically distributed in pairs at both ends of the connecting plate (4); one end of the two reinforcing plates (5) located at the same end of the connecting plate (4) is fixedly connected to the side of the connecting plate (4), and the other end is fixedly connected to the end of the C arc segment (2) and the straight segment (3) respectively.

4. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction according to claim 3, characterized in that, Several support plates (9) are vertically and uniformly welded between adjacent C-arc segments (2), adjacent straight segments (3), adjacent connecting plates (4), and adjacent reinforcing plates (5); the two ends of the connecting plates (4) are welded and fixed to the straight segments (3); the two ends of the reinforcing plates (5) are welded and fixed to the connecting plates (4), C-arc segments (2), and straight segments (3), respectively.

5. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction according to claim 4, characterized in that, The C-segment (2) and the straight segment (3) are both made of Q345B steel; the connecting plate (4), the reinforcing plate (5) and the supporting plate (9) are all made of I28a I-beams; the bottom sealing (7) is made of C30 concrete.

6. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction according to claim 5, characterized in that, The outer frame (6) includes several steel pipes (10) that fit together; T-shaped grooves (11) are provided on the periphery of the steel pipes (10); two T-shaped slide rails (12) are slidably provided on the inner wall of the T-shaped grooves (11); and a locking plate (13) is fixed on the side of the T-shaped slide rails (12).

7. A dumbbell-shaped interlocking pile cofferdam for deep foundation pit construction according to claim 6, characterized in that, The dumbbell-shaped frame (1) has several plug-in rings (14) evenly fixed on its outer periphery; the steel pipe (10) has an L-shaped plug-in pipe (15) fixed on its periphery to engage with the plug-in rings (14).

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