Cofferdam supporting structure for water conservancy and hydropower construction

Abstract

The water conservancy and hydropower construction cofferdam supporting structure comprises a pile foundation and a surrounding plate assembly, and an insertion pile is arranged on the outer wall of the bottom end of the pile foundation and at least used for achieving reinforcement and fixation of the pile foundation at the bottom of a riverbed; a plurality of locking assemblies are arranged on the side wall of the pile foundation; a plurality of outer supports are arranged on the outer side of the pile foundation, a plurality of outer pull rods connected with the coaming assembly are arranged on the outer supports, and the locking assembly is at least used for fixedly installing the outer supports on the pile foundation. Connecting pieces are arranged at the inner corners of the pile foundations. An inner support is arranged on the inner side of the pile foundation, and a plurality of inner ejector rods connected with the coaming assembly are arranged on the inner support. The coaming assembly is installed between every two adjacent pile foundations. By means of the pile foundation, positioning installation of the coaming assembly can be achieved, meanwhile, the inner support and the outer support are arranged on the pile foundation, jacking and pulling of the coaming assembly are achieved, and the water flow impact resistance of the coaming assembly is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower construction, and in particular to a water conservancy and hydropower construction cofferdam supporting structure. Background Art

[0002] Cofferdam is a temporary enclosure structure built for the construction of permanent water conservancy facilities to prevent water and soil from entering the construction site of the building, so as to drain water, excavate foundation pits and build buildings in the cofferdam. Steel sheet pile cofferdam can adapt to different seepage foundations. Steel sheet pile cofferdam has enclosures, piles and columns to block water and soil, and beams to support the enclosures. It is generally used in hydraulic structures. Except as part of a formal building, the cofferdam is generally dismantled after use.

[0003] For example, a water conservancy construction cofferdam device with application number CN202311701070.5 includes a wall, a connecting groove is provided on the side wall of the wall, a connecting block is arranged on the side wall of the connecting groove, a fixed block is arranged next to the wall, a connecting groove is provided on the fixed block, a buffer is provided on the side wall of the wall, a limit box used in conjunction with the buffer is fixedly connected to the fixed block, a snap-fit ​​groove is provided on the side wall of the fixed block, a first support rod is provided inside the wall, the first support rod is arranged on the snap-fit ​​groove, a second support rod is fixedly connected to the inner wall of the wall, a support plate is provided inside the wall, and a triangular groove is fixedly connected to the bottom of the wall. The buffer and buffer spring can be used to buffer the impact of the water flow, and the wave-shaped buffer plate can increase the contact area with the water flow and change the direction of the impact force.

[0004] The above-mentioned cofferdam structures and those in the prior art still have the following problems when used:

[0005] The cofferdam is affected by the water flow. There is a lack of supporting structure in the cofferdam. The water flow is blocked only by the cofferdam, which can easily cause the cofferdam to bend and deform under the water pressure.

[0006] Although some cofferdams have supporting structures, the supporting structures of the cofferdams are generally arranged inside the cofferdams, but the arrangement of the supporting structures is messy, which affects the later construction inside the cofferdams;

[0007] After the underwater construction is completed, the cofferdam and the supporting structure are not easy to remove. Therefore, it is urgent to design a water conservancy and hydropower construction cofferdam supporting structure to solve the above problems. Summary of the invention

[0008] The object of the present invention is to provide a water conservancy and hydropower construction cofferdam support structure to solve the above-mentioned deficiencies in the prior art.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A water conservancy and hydropower construction cofferdam support structure, comprising a pile foundation and a cofferdam assembly, wherein an insert pile is arranged on the outer wall of the bottom end of the pile foundation, and the insert pile is at least used to realize the reinforcement and fixation of the pile foundation at the bottom of the riverbed;

[0011] A plurality of locking components are arranged on the side walls of the pile foundation;

[0012] A plurality of external supports are arranged on the outside of the pile foundation, a plurality of external pull rods connected to the enclosure assembly are arranged on the external supports, and the locking assembly is at least used for fixing the external supports on the pile foundation;

[0013] A connecting piece is provided at the inner corner of the pile foundation;

[0014] An inner support is provided on the inner side of the pile foundation, and a plurality of inner push rods connected to the enclosure assembly are provided on the inner support. The connecting member is at least used for connecting the inner support to the pile foundation, and the inner support slides up and down along the pile foundation through the connecting member.

[0015] The enclosure assembly is installed between two adjacent pile foundations.

[0016] Furthermore, the number of the pile foundations is at least four, the outer support is located outside the area enclosed by the four pile foundations, and the inner support is located inside the area enclosed by the four pile foundations.

[0017] Furthermore, the pile foundation includes a positioning pile, and a water retaining sheet is fixedly provided on the outer wall of the bottom of the positioning pile, and the water retaining sheet is a fan-shaped structure.

[0018] Furthermore, the outer walls on both sides of the positioning pile are provided with enclosure plate installation grooves, and the enclosure plate assembly is slidably inserted into the enclosure plate installation grooves from top to bottom;

[0019] A slide groove is provided at the inner corner of the positioning pile, and the connecting piece is slidably inserted in the slide groove;

[0020] Positioning surfaces are arranged on the outer walls on both sides of the positioning pile.

[0021] Furthermore, a threaded hole is provided on the outer wall of the bottom of the positioning pile, and the insertion pile is threadedly connected to the bottom end of the positioning pile;

[0022] Slots are provided on the outer walls on both sides of the positioning pile, and the outer support is connected to the positioning pile through the slots.

[0023] Furthermore, the insertion pile comprises a column, the top end of which is fixedly provided with an integrally formed threaded column, and the bottom end of which is provided with an earth-entering cone.

[0024] Furthermore, the locking assembly includes a sleeve fixed on the outer wall of the pile foundation, and a plug rod is inserted into the interior of the sleeve, and a stop block is fixedly provided on the top end of the plug rod.

[0025] Furthermore, the outer support comprises a reinforcement beam, and both ends of the reinforcement beam are provided with an integrally formed tenon.

[0026] Furthermore, the connecting member includes a sliding seat, a slider is provided at the inner corner of the sliding seat, and symmetrically distributed follower blocks are provided on the outer walls on both sides of the sliding seat, and locking bolts are provided on the follower blocks. The sliding seat, slider and follower block are an integrally formed structure.

[0027] Furthermore, the enclosure assembly includes a plurality of enclosure 1s and enclosure 2s, a protrusion is provided on one side outer wall of the enclosure 1, a groove matching with the protrusion is provided on one side outer wall of the enclosure 2, and a plurality of enclosure 1s and enclosure 2s together constitute the enclosure assembly through the cooperation of the protrusion and the groove.

[0028] In the above technical scheme, the present invention provides a water conservancy and hydropower construction cofferdam support structure, (1) through the pile foundation, the cofferdam assembly can be positioned and installed, and the inner support and outer support arranged on the pile foundation can respectively support and pull the cofferdam assembly, effectively improving the cofferdam assembly's resistance to the impact of water flow and avoiding the cofferdam assembly from bending and deformation due to water pressure. (2) The inner support and outer support are arranged in parallel with the cofferdam assembly, which will not allow the inner support and outer support to occupy too much cofferdam space. The distribution of the inner support and outer support is relatively reasonable. At the same time, the inner support and the pile foundation are connected in a sliding manner, which is convenient for adjusting the height of the inner support inside the cofferdam. The inner support and outer support are more conducive to the removal after the completion of underwater construction, and the effect of rapid disassembly and assembly of the cofferdam is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0030] Figure 1 A structural schematic diagram is provided for an embodiment of a water conservancy and hydropower construction cofferdam support structure of the present invention.

[0031] Figure 2 A schematic diagram of a water conservancy and hydropower construction cofferdam support structure embodiment of the present invention is provided with the inner and outer support structures removed.

[0032] Figure 3A schematic structural diagram of a water conservancy and hydropower construction cofferdam support structure embodiment of the present invention with the cofferdam assembly removed is provided.

[0033] Figure 4 Schematic diagram of pile foundation and inserted pile structure provided for a water conservancy and hydropower construction cofferdam support structure embodiment of the present invention Figure 1 .

[0034] Figure 5 Schematic diagram of pile foundation and inserted pile structure provided for a water conservancy and hydropower construction cofferdam support structure embodiment of the present invention Figure 2 .

[0035] Figure 6 A schematic diagram of an external support structure provided for an embodiment of a cofferdam support structure for water conservancy and hydropower construction according to the present invention.

[0036] Figure 7 A schematic diagram of an internal support structure provided for an embodiment of a cofferdam support structure for water conservancy and hydropower construction according to the present invention.

[0037] Figure 8 A partial enlarged view of the structure of the enclosure assembly provided in an embodiment of the cofferdam support structure for water conservancy and hydropower construction of the present invention.

[0038] Description of reference numerals:

[0039] 1. Pile foundation; 11. Positioning pile; 12. Water retaining plate; 13. Enclosure installation groove; 14. Slide groove; 15. Positioning surface; 16. Threaded hole; 17. Slot; 2. Insert pile; 21. Column; 22. Threaded column; 23. Earth-entering cone; 3. Locking assembly; 31. Plug sleeve; 32. Insert rod; 33. Stop block; 4. External support; 41. Reinforcement beam; 42. Tenon; 43. External pull rod; 5. Connector; 51. Sliding seat; 52. Sliding block; 53. Follower block; 54. Locking bolt; 6. Internal support; 61. Internal push rod; 7. Enclosure assembly; 71. Enclosure one; 72. Enclosure two; 73. Slot; 74. Protrusion. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] like Figure 1-8As shown, a water conservancy and hydropower construction cofferdam support structure provided by an embodiment of the present invention includes a pile foundation 1 and a shroud assembly 7, an inserted pile 2 is arranged on the outer wall at the bottom of the pile foundation 1, and the inserted pile 2 is at least used to realize the reinforcement and fixation of the pile foundation 1 on the bottom of the riverbed; a plurality of locking assemblies 3 are arranged on the side wall of the pile foundation 1; a plurality of outer supports 4 are arranged on the outer side of the pile foundation 1, and a plurality of outer pull rods 43 connected with the shroud assembly 7 are arranged on the outer support 4, and the locking assembly 3 is at least used for the fixed installation of the outer support 4 on the pile foundation 1; a connecting piece 5 is arranged at the inner corner of the pile foundation 1; an inner support 6 is arranged on the inner side of the pile foundation 1, and a plurality of inner push rods 61 connected with the shroud assembly 7 are arranged on the inner support 6, and the connecting piece 5 is at least used for the connection of the inner support 6 on the pile foundation 1, and the inner support 6 slides up and down along the pile foundation 1 through the connecting piece 5; the shroud assembly 7 is installed at a position between two adjacent pile foundations 1.

[0042] In this embodiment, a pile foundation 1 is included. The pile foundation 1 is a steel structure. Depending on the construction depth and the flow rate of the river water, a hollow structure or a solid steel structure can be used.

[0043] Specifically, the number of pile foundations 1 is at least four, and different numbers of pile foundations 1 are used according to the area of ​​the cofferdam. The pile foundation 1 includes a positioning pile 11, and a water retaining sheet 12 is fixedly arranged on the outer wall at the bottom of the positioning pile 11, and the water retaining sheet 12 is a fan-shaped structure. After the pile foundation 1 is fixed on the riverbed by inserting the pile 2, the water retaining sheet 12 is also inserted into the riverbed, which plays a waterproof effect on the cofferdam;

[0044] Specifically, the outer walls on both sides of the positioning pile 11 are provided with a panel installation groove 13, and the panel assembly 7 is slidably inserted into the interior of the panel installation groove 13 from top to bottom. The panel installation groove 13 is used in conjunction with the panel 1 71 and the panel 2 72 located at the edge;

[0045] Specifically, a slide groove 14 is provided at the inner corner of the positioning pile 11, the connecting member 5 is slidably inserted in the slide groove 14, and the slider 52 of the connecting member 5 is slidably inserted in the slide groove 14;

[0046] Specifically, positioning surfaces 15 are provided on the outer walls on both sides of the positioning pile 11. The positioning surface 15 is a planar structure, and a plurality of bolt insertion holes may also be provided on the positioning surface 15. The contact between the locking bolt 54 and the positioning surface 15 is utilized to fix the connector 5 on the pile foundation 1.

[0047] Specifically, a threaded hole 16 is provided on the outer wall at the bottom of the positioning pile 11, and the inserted pile 2 is threadedly connected to the bottom end of the positioning pile 11, and the inserted pile 2 is threadedly inserted into the inside of the threaded hole 16 through a threaded column 22, thereby achieving a fixed connection between the inserted pile 2 and the pile foundation 1;

[0048] In another embodiment, the insert pile 2 may also be directly welded to the bottom of the pile foundation 1, that is, without adopting the thread disassembly method;

[0049] Specifically, slots 17 are provided on the outer walls on both sides of the positioning pile 11, the outer support 4 is connected to the positioning pile 11 through the slots 17, and the tenons 42 at both ends of the reinforcement beam 41 are inserted into the slots 17, thereby achieving fixed installation of the outer support 4 on the pile foundation 1.

[0050] In this embodiment, the enclosure assembly 7 is installed between two adjacent pile foundations 1;

[0051] Specifically, the enclosure assembly 7 includes a plurality of enclosures 71 and enclosures 72. A protrusion 74 is provided on one side outer wall of the enclosure 1 71, and a groove 73 matching with the protrusion 74 is provided on one side outer wall of the enclosure 2 72. The plurality of enclosures 71 and enclosures 72 together constitute the enclosure assembly 7 through the cooperation of the protrusion 74 and the groove 73.

[0052] In this embodiment, an insert pile 2 is provided on the outer wall at the bottom end of the pile foundation 1, and the insert pile 2 is at least used to realize the reinforcement and fixation of the pile foundation 1 at the bottom of the riverbed;

[0053] Specifically, the inserted pile 2 includes a column 21, the top of which is fixedly provided with an integrally formed threaded column 22, and the bottom of the column 21 is provided with an entrapment cone 23, which is inserted into the riverbed through the entrapment cone 23, thereby achieving fixation of the inserted pile 2 on the riverbed, and the inserted pile 2 is inserted as a whole into the riverbed to achieve fixation of the pile foundation 1.

[0054] In this embodiment, a plurality of locking components 3 are provided on the side wall of the pile foundation 1;

[0055] Specifically, the locking assembly 3 includes a sleeve 31 fixed on the outer wall of the pile foundation 1, and a rod 32 is inserted inside the sleeve 31, and a stop block 33 is fixedly provided on the top of the rod 32. When the tenons 42 at both ends of the reinforcement beam 41 are inserted into the slot 17, the worker inserts the rod 32 into the sleeve 31 to achieve a fixed connection between the tenon 42 and the slot 17. At the same time, a pin can also be used to connect and fix the lower part of the rod 32.

[0056] In this embodiment, a plurality of outer supports 4 are arranged on the outside of the pile foundation 1, and a plurality of outer tie rods 43 connected to the enclosure assembly 7 are arranged on the outer supports 4. The locking assembly 3 is at least used for fixing the outer supports 4 on the pile foundation 1. The connection between the outer tie rods 43, the outer supports 4 and the enclosure assembly 7 is utilized to improve the ability of the enclosure assembly 7 to withstand the impact of the river, thereby preventing the enclosure assembly 7 from bending and deformation.

[0057] Specifically, the outer support 4 includes a reinforcing beam 41, both ends of the reinforcing beam 41 are provided with an integrally formed tenon 42, the number of the outer supports 4 can be arranged in multiple layers, and the spacing between the upper and lower layers of the outer supports 4 is 1m.

[0058] In this embodiment, a connecting member 5 is provided at the inner corner of the pile foundation 1;

[0059] Specifically, the connecting member 5 includes a sliding seat 51, a sliding block 52 is arranged at the inner corner of the sliding seat 51, the sliding block 52 is inserted into the inside of the sliding groove 14, and the sliding block 52 can slide up and down inside the sliding groove 14, and symmetrically distributed follower blocks 53 are arranged on the outer walls on both sides of the sliding seat 51, and the follower blocks 53 move together with the sliding blocks 52. The follower blocks 53 are provided with locking bolts 54. By pre-tightening the locking bolts 54, the connecting member 5 is fixedly installed on the pile foundation 1. The sliding seat 51, the sliding block 52 and the follower block 53 are an integrally formed structure.

[0060] In this embodiment, an inner support 6 is provided on the inner side of the pile foundation 1, and a plurality of inner push rods 61 connected to the enclosure assembly 7 are provided on the inner support 6. After the inner support 6 is installed on the inner side of the pile foundation 1 through the connecting member 5, the worker can install the inner push rod 61 between the inner support 6 and the enclosure assembly 7, and use the inner push rod 61 to support the enclosure assembly 7, thereby further enhancing the pressure-bearing effect of the enclosure assembly 7. The connecting member 5 is at least used for connecting the inner support 6 to the pile foundation 1, and the inner support 6 slides up and down along the pile foundation 1 through the connecting member 5.

[0061] In this embodiment, the outer support 4 is located on the outside of the area enclosed by the four pile foundations 1, and the inner support 6 is located on the inside of the area enclosed by the four pile foundations 1. The outer support 4 and the inner support 6 are respectively located on the outside and inside of the enclosure assembly 7, which improves the pressure resistance of the enclosure assembly 7 to the water flow, ensures the stability of the enclosure assembly 7 underwater, and improves the safety of the cofferdam construction.

[0062] Operation steps: (1) First, make preparations before construction, measure and locate the installation position of the pile foundation 1 in the designated water area, and the worker fixes the inserted pile 2 at the bottom end of the pile foundation 1;

[0063] (2) Using a pile driver or other machine, the pile foundation 1 and the inserted pile 2 are fixed on the riverbed, so that the inserted pile 2 is completely inserted into the interior of the riverbed, thereby achieving fixed installation of the pile foundation 1 on the riverbed;

[0064] (3) Then, the cofferdam assemblies 7 are inserted one by one between two adjacent pile foundations 1, thereby forming the main structure of the cofferdam;

[0065] (4) The worker puts on a diving suit and dives into the river water outside the cofferdam, uses the locking assembly 3 to fix the outer support 4 to the outside of the pile foundation 1, and uses the outer tie rod 43 to connect it with the cofferdam assembly 7, thereby realizing the installation of the support structure outside the cofferdam;

[0066] (5) The water inside the cofferdam assembly 7 is pumped out in batches. After the first pumping, the inner support 6 is installed on the inner side of the pile foundation 1 through the connecting piece 5. Then, the first layer of inner support 6 is slid downward on the pile foundation 1 through the connecting piece 5, and the next layer of inner support 6 is installed on the top of the pile foundation 1. Then, the third pumping is performed. According to the above pumping method, the inner support 6 is installed in multiple layers inside the pile foundation 1 until all the water inside the cofferdam is pumped out.

[0067] (6) When pumping water, the enclosure assembly 7 may leak. The enclosure assembly 7 can be plugged with sand and stone to plug the leak.

[0068] (7) Underwater construction is carried out inside the cofferdam. After the construction is completed, when the cofferdam is dismantled, water can be injected into the inside of the cofferdam in batches to dismantle the multiple layers of internal supports 6. Then, workers put on diving suits and dismantle the external supports 4 one by one, and then dismantle the enclosure assembly 7 and the pile foundation 1 one by one.

[0069] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A water conservancy and hydropower construction cofferdam support structure, comprising a pile foundation (1) and a cofferdam assembly (7), characterized in that: An insertion pile (2) is arranged on the outer wall of the bottom end of the pile foundation (1), and the insertion pile (2) is at least used to reinforce and fix the pile foundation (1) at the bottom of the riverbed; A plurality of locking components (3) are arranged on the side wall of the pile foundation (1); A plurality of external supports (4) are arranged on the outside of the pile foundation (1), a plurality of external pull rods (43) connected to the enclosure assembly (7) are arranged on the external supports (4), and the locking assembly (3) is at least used for fixing the external supports (4) on the pile foundation (1); A connecting piece (5) is provided at the inner corner of the pile foundation (1); An inner support (6) is arranged on the inner side of the pile foundation (1), and a plurality of inner push rods (61) connected to the enclosure assembly (7) are arranged on the inner support (6); the connecting member (5) is at least used for connecting the inner support (6) to the pile foundation (1), and the inner support (6) slides up and down along the pile foundation (1) through the connecting member (5); The enclosure assembly (7) is installed between two adjacent pile foundations (1).

2. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The number of the pile foundations (1) is at least four, the outer support (4) is located outside the area enclosed by the four pile foundations (1), and the inner support (6) is located inside the area enclosed by the four pile foundations (1).

3. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The pile foundation (1) comprises a positioning pile (11), and a water retaining sheet (12) is fixedly arranged on the outer wall of the bottom of the positioning pile (11), and the water retaining sheet (12) is a fan-shaped structure.

4. A water conservancy and hydropower construction cofferdam support structure according to claim 2, characterized in that: The outer walls of both sides of the positioning pile (11) are provided with enclosure plate installation grooves (13), and the enclosure plate assembly (7) is slidably inserted into the enclosure plate installation grooves (13) from top to bottom; A slide groove (14) is provided at the inner corner of the positioning pile (11), and the connecting member (5) is slidably inserted into the slide groove (14); Positioning surfaces (15) are provided on the outer walls on both sides of the positioning pile (11).

5. A water conservancy and hydropower construction cofferdam support structure according to claim 2, characterized in that: A threaded hole (16) is provided on the outer wall of the bottom of the positioning pile (11), and the insertion pile (2) is threadedly connected to the bottom end of the positioning pile (11); Slots (17) are provided on the outer walls on both sides of the positioning pile (11), and the outer support (4) is connected to the positioning pile (11) via the slots (17).

6. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The insertion pile (2) comprises a column (21), the top end of which is fixedly provided with an integrally formed threaded column (22), and the bottom end of which is provided with an earth-entering cone (23).

7. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The locking assembly (3) comprises a sleeve (31) fixed on the outer wall of the pile foundation (1), and a plug rod (32) is inserted into the interior of the sleeve (31), and a stop block (33) is fixedly provided at the top end of the plug rod (32).

8. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The outer support (4) comprises a reinforcing beam (41), and both ends of the reinforcing beam (41) are provided with an integrally formed tenon (42).

9. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The connecting member (5) comprises a sliding seat (51), a sliding block (52) is arranged at the inner corner of the sliding seat (51), and symmetrically distributed follower blocks (53) are arranged on the outer walls of both sides of the sliding seat (51), and locking bolts (54) are arranged on the follower blocks (53). The sliding seat (51), the sliding block (52) and the follower blocks (53) are an integrally formed structure.

10. A water conservancy and hydropower construction cofferdam support structure according to claim 1, characterized in that: The enclosure assembly (7) comprises a plurality of enclosures one (71) and enclosures two (72); a protrusion (74) is provided on one side outer wall of the enclosure one (71); a groove (73) matching with the protrusion (74) is provided on one side outer wall of the enclosure two (72); and the plurality of enclosures one (71) and enclosures two (72) together form the enclosure assembly (7) through the matching of the protrusion (74) and the groove (73).

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