A cofferdam device for water conservancy construction

Abstract

The present invention proposes a water conservancy construction cofferdam device, which relates to the technical field of water conservancy construction, and includes a plurality of cofferdam sleeves, wherein the top of the cofferdam sleeve is provided with a boss portion, and the bottom of the cofferdam sleeve is provided with a positioning groove that matches the boss portion. When the plurality of cofferdam sleeves are vertically spliced, the positioning groove of the cofferdam sleeve located at the top is stuck above the boss portion of the cofferdam sleeve located at the bottom. The water conservancy construction cofferdam device only needs to inject or pump water into the material discharging cavity of the plurality of cofferdam sleeves through a water pipe, which can not only control the floating or sinking state of the plurality of cofferdam sleeves, but also change the clamping state between the chuck and the convex rod, and at the same time change the limiting state of the buoyancy limiter on the buoyancy block. In combination with the above corresponding states during construction, it is not only convenient for the fixed splicing and dismantling work between the plurality of cofferdam sleeves, but also convenient for transportation and construction, thereby reducing the construction difficulty and improving the construction efficiency.

Description

Technical Field

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

[0002] A cofferdam device refers to a temporary enclosure structure built in the construction of permanent water conservancy facilities during water conservancy project construction. Its function is to prevent water and soil from entering the construction site of the building so as to drain water in the cofferdam, excavate foundation pits, and build buildings. It is generally used in hydraulic structures to enclose a waterless area in the water for construction. The cofferdam device is generally dismantled after construction. The cofferdam device mainly includes earth and stone cofferdams, steel sheet pile cofferdams, prefabricated sleeve cofferdams, wooden cage cofferdams, etc. The cofferdam device mentioned in this application is a prefabricated sleeve cofferdam device.

[0003] The prefabricated sleeve cofferdam device is a cofferdam structure made of concrete sleeves or steel box tubes. When the current prefabricated sleeve cofferdam device is used in a deep river environment, it is difficult to transport and construct due to its large size. Sometimes, multiple sleeves are spliced ​​for construction. However, when multiple sleeves are spliced, the joints need to be sealed and are located underwater, so divers need to dive underwater to complete the disassembly and assembly of the joints. This is inconvenient for the splicing and dismantling of multiple sleeves, affecting construction efficiency.

[0004] Therefore, we propose a water conservancy construction cofferdam device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to make up for the deficiencies of the prior art and to propose a water conservancy construction cofferdam device, which is not only convenient for the fixed splicing and dismantling of multiple cofferdam sleeves, but also convenient for transportation and construction.

[0006] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a water conservancy construction cofferdam device, comprising a plurality of cofferdam sleeves, the top end of the cofferdam sleeves is provided with a boss portion, the bottom end of the cofferdam sleeves is provided with a positioning groove matching the boss portion, when the plurality of cofferdam sleeves are vertically spliced, the positioning groove of the cofferdam sleeve located at the upper end is stuck above the boss portion of the cofferdam sleeve located at the lower end.

[0007] Specifically, a sealing strip is fixedly arranged inside the positioning groove, and a plurality of lifting ears are fixed on the outer surface of the cofferdam sleeve. When a plurality of cofferdam sleeves are connected end to end, the gaps at the joints are sealed by the lifting ears.

[0008] Furthermore, it also includes an auxiliary frame for assisting the vertical splicing of the cofferdam sleeves. When the cofferdam sleeves are vertically spliced, they are slidably sleeved on the periphery of the auxiliary frame, and the cofferdam sleeves cannot rotate on the periphery of the auxiliary frame.

[0009] A material discharging cavity is provided inside the cofferdam sleeve, a plurality of rotating shafts are rotatably connected to the top of the cofferdam sleeve, and the middle of the rotating shafts passes through the top of the material discharging cavity, the outer surface of the rotating shafts and the contact part of the cofferdam sleeve are rotatably sealed, a chuck is fixed at both ends of the rotating shaft, a buoyancy block is fixed on the outer surface of the rotating shaft, and the buoyancy block is located in the material discharging cavity.

[0010] Furthermore, a counterweight block is fixed at the bottom of the buoyancy block, the gravity of the counterweight block is less than the buoyancy of the buoyancy block, and the density value of the counterweight block ≈ the density value of water.

[0011] A protruding rod is provided directly below each chuck, and the protruding rod is fixed to the bottom of the cofferdam sleeve. When multiple cofferdam sleeves are vertically spliced, the chuck of the cofferdam sleeve at the bottom can be clamped on the protruding rod of the cofferdam sleeve at the top by rotating.

[0012] The top of the discharging cavity is connected with an air guide pipe, and the bottom of the discharging cavity is connected with a water guide pipe. The ends of the air guide pipe and the water guide pipe away from the discharging cavity both extend to the outside of the cofferdam sleeve. The air guide pipe is used to inject water into the discharging cavity or to extract water from the discharging cavity. When water is injected into the discharging cavity, the air in the discharging cavity is discharged through the air guide pipe, and when the water in the discharging cavity is extracted, air is introduced into the discharging cavity through the air guide pipe.

[0013] Furthermore, a floating block is fixed to one end of the air guide tube away from the material discharging cavity, and one end of the water guide tube away from the material discharging cavity is fixedly connected to the floating block.

[0014] When there is no water in the discharging cavity, the top of the cofferdam sleeve can float on the water surface when it is in the water; when the water injection height in the discharging cavity reaches the height of the rotating shaft, the cofferdam sleeve can be completely submerged in the water.

[0015] A clamping shaft is rotatably connected to one side of the buoyancy block, and a buoyancy limiting member for limiting the buoyancy block is arranged inside the material-digging cavity.

[0016] Specifically, the buoyancy limiter includes a floating block, the bottom of the floating block is arc-shaped, a slide is fixed to the top of the floating block, a slide is slidably sleeved on the outer surface of the slide, the slide is fixed to the inner wall of the material discharging cavity, and a groove matching the clamping shaft is opened at the bottom of the floating block.

[0017] Compared with the prior art, the water conservancy construction cofferdam device has the following beneficial effects: The water conservancy construction cofferdam device only needs to inject or pump water into the material discharging cavities of multiple cofferdam sleeves through a water pipe, which can not only control the floating or sinking state of the multiple cofferdam sleeves, but also change the clamping state between the chuck and the protruding rod, and at the same time change the limiting state of the buoyancy limiter on the buoyancy block. During construction, combined with the above corresponding states, it is not only convenient for fixing, splicing and dismantling of multiple cofferdam sleeves, but also convenient for transportation and construction, thereby reducing the difficulty of construction and improving construction efficiency.

[0018] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the cofferdam sleeve in the present invention; Figure 2 The internal structure of the cofferdam sleeve of the present invention is shown in cross section. Figure 1 ; Figure 3 It is a schematic diagram of the cross-sectional structure of the cofferdam sleeve in the present invention from a front view perspective; Figure 4 The internal structure of the cofferdam sleeve of the present invention is shown in cross section. Figure 2 ; Figure 5 The internal structure of the cofferdam sleeve of the present invention is shown in cross section. Figure 3 ; Figure 6 It is a three-dimensional structural schematic diagram of the rotating shaft, the chuck, the buoyancy block and the buoyancy limiter in the present invention; Figure 7 It is a schematic diagram of the disassembled structure of the rotating shaft, the chuck and the buoyancy block in the present invention; Figure 8 It is a schematic diagram of the vertical splicing state of multiple cofferdam sleeves in the present invention; Fig. 9 It is a cross-sectional schematic diagram of a plurality of cofferdam sleeves in the present invention in a dismantled state; Fig.10 When water is injected into the material discharging cavity in the present invention, the buoyancy block drives the rotating shaft and the chuck to rotate under the action of buoyancy, and the clamping state of the chuck and the protruding rod is schematically shown. Figure 1 ; Fig.11 When water is injected into the material discharging cavity in the present invention, the buoyancy block drives the rotating shaft and the chuck to rotate under the action of buoyancy, and the clamping state of the chuck and the protruding rod is schematically shown. Figure 2 ; Fig.12 It is a schematic diagram of the three-dimensional structure of the auxiliary frame in the present invention; Fig.13 This is a schematic diagram of the construction status of the cofferdam device for the water conservancy construction.

[0020] In the figure: 1. cofferdam sleeve; 101. boss portion; 102. positioning groove; 103. sealing strip; 104. lifting lug; 2. Material removal cavity; 201. Air guide pipe; 202. Water guide pipe; 3. Rotating shaft; 4. Chuck; 5. Buoyancy block; 501. Counterweight block; 6. Protruding rod; 7. Clamping shaft; 8. buoyancy limiter; 801. floating block; 802. slot; 803. slide plate; 804. slide cylinder; 9. Floating block; 10. Auxiliary frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 13 The present invention provides the following implementation scheme: a water conservancy construction cofferdam device, comprising a plurality of cofferdam sleeves 1, the top of the cofferdam sleeve 1 is provided with a boss portion 101, the bottom of the cofferdam sleeve 1 is provided with a positioning groove 102 that matches the boss portion 101, when the plurality of cofferdam sleeves 1 are vertically spliced, the positioning groove 102 of the cofferdam sleeve 1 located at the top is stuck above the boss portion 101 of the cofferdam sleeve 1 located at the bottom, which is conducive to connecting the plurality of cofferdam sleeves 1 end to end (reference Figure 8 and Fig. 9 as shown).

[0023] As a specific solution, a sealing strip 103 is fixedly arranged inside the positioning groove 102, and a plurality of lifting ears 104 are fixedly arranged on the outer surface of the cofferdam sleeve 1. The provided lifting ears 104 facilitate the lifting of the cofferdam sleeve 1 (refer to Figure 8 As shown), when multiple cofferdam sleeves 1 are connected end to end, the gap at the joint is sealed by a sealing strip 103.

[0024] Please refer to 12 and Fig.13 , and also includes an auxiliary frame 10 for assisting the vertical splicing of the cofferdam sleeves 1. When the multiple cofferdam sleeves 1 are vertically spliced, they are slidably sleeved on the periphery of the auxiliary frame 10, and the cofferdam sleeves 1 cannot rotate on the periphery of the auxiliary frame 10. The auxiliary frame 10 is used to enable the multiple cofferdam sleeves 1 to be aligned up and down when they are vertically spliced.

[0025] Please refer to Figure 2 to Figure 5 The cofferdam sleeve 1 has a material discharging cavity 2 formed inside. The top of the cofferdam sleeve 1 is rotatably connected with a plurality of rotating shafts 3, and the middle of the rotating shafts 3 penetrates the top of the material discharging cavity 2. The outer surface of the rotating shaft 3 is in a rotatable sealed connection with the contact portion of the cofferdam sleeve 1. A chuck 4 is fixed at both ends of the rotating shaft 3, and the two chucks 4 are respectively located on the inner wall surface of the cofferdam sleeve 1 and the outer wall surface of the cofferdam sleeve 1. A buoyancy block 5 is fixed on the outer surface of the rotating shaft 3, and the buoyancy block 5 is located in the material discharging cavity 2. The density of the buoyancy block 5 is much smaller than the density of water.

[0026] As a further solution, Figures 4 to 7 As shown, a counterweight 501 is fixed to the bottom of the buoyancy block 5, the gravity of the counterweight 501 is less than the buoyancy of the buoyancy block 5, and the density of the counterweight 501 is ≈ the density of water. When the buoyancy block 5 is not in the water, the counterweight 501 keeps the buoyancy block 5 in a drooping state.

[0027] A convex rod 6 is provided directly below each chuck 4, and the convex rod 6 is fixed to the bottom of the cofferdam sleeve 1. The clamping portion of the chuck 4 is arc-shaped, and a notch is provided at the top thereof. When multiple cofferdam sleeves 1 are vertically spliced, the chuck 4 of the cofferdam sleeve 1 at the bottom can be clamped on the convex rod 6 of the cofferdam sleeve 1 at the top by rotating (refer to Fig.10 and Fig.11 as shown).

[0028] Please refer to Figure 1 to Figure 3 The top of the material discharging chamber 2 is connected with an air guide pipe 201, and the bottom of the material discharging chamber 2 is connected with a water guide pipe 202. The ends of the air guide pipe 201 and the water guide pipe 202 away from the material discharging chamber 2 are both extended to the outside of the cofferdam sleeve 1. The air guide pipe 201 is used to inject water into the material discharging chamber 2 or to extract the water inside the material discharging chamber 2. When water is injected into the material discharging chamber 2, the air in the material discharging chamber 2 is discharged through the air guide pipe 201. When the water inside the material discharging chamber 2 is extracted, air is introduced into the material discharging chamber 2 through the air guide pipe 201.

[0029] As a further solution, a floating block 9 is fixed to one end of the air guide pipe 201 away from the material discharging chamber 2, and one end of the water guide pipe 202 away from the material discharging chamber 2 is fixedly connected to the floating block 9. The floating block 9 allows the ends of the air guide pipe 201 and the water guide pipe 202 away from the material discharging chamber 2 to float on the water surface, and allows the end of the water guide pipe 202 away from the material discharging chamber 2 to be connected to a reversible water pump, so as to facilitate water injection into the material discharging chamber 2 or pumping out the water inside the material discharging chamber 2.

[0030] When there is no water in the discharging cavity 2, the top of the cofferdam sleeve 1 can float on the water surface when it is in the water; when the water injection height in the discharging cavity 2 reaches the height of the rotating shaft 3, the cofferdam sleeve 1 can be completely submerged in the water.

[0031] During the vertical splicing of multiple cofferdam sleeves 1: When there is no water in the material discharging cavity 2, the buoyancy block 5 sags due to the gravity, and the chuck 4 cannot be engaged with the protruding rod 6 at this time (refer to Figure 2 to Figure 5 When water is injected into the material discharging cavity 2, the bottom end of the buoyancy block 5 rotates around the shaft 3 under the action of buoyancy, and drives the shaft 3 and the chuck 4 to rotate, so that the chuck 4 can be clamped on the outside of the protruding rod 6 (refer to Fig.10 and Fig.11 as shown).

[0032] Please refer to Figure 3 , Figure 6 and Figure 7 A clamping shaft 7 is rotatably connected to one side of the buoyancy block 5 , and a buoyancy limiting member 8 for limiting the buoyancy block 5 is provided inside the material discharging cavity 2 .

[0033] Specifically, the buoyancy limiter 8 includes a float block 801, the bottom of which is arc-shaped, a slide plate 803 is fixed to the top of the float block 801, a slide tube 804 is slidably sleeved on the outer surface of the slide plate 803, and the slide tube 804 is fixed to the inner wall of the material discharging cavity 2, and a card slot 802 adapted to the card shaft 7 is opened at the bottom of the float block 801.

[0034] The buoyancy limiter 8 is used to limit the buoyancy block 5: when there is no water in the material discharging chamber 2, the buoyancy block 5 sags due to the action of gravity, and the clamping shaft 7 is clamped in the inside of the clamping groove 802 to prevent the buoyancy block 5 from shaking randomly during transportation and prevent the chuck 4 from rotating; when water is filled in the material discharging chamber 2, the buoyancy block 801 can float up until the bottom of the buoyancy block 801 is located above the clamping shaft 7, and the clamping shaft 7 is no longer clamped by the clamping groove 802, so that the buoyancy block 5 can drive the rotating shaft 3 and the chuck 4 to rotate under the action of buoyancy.

[0035] Working principle: When constructing the cofferdam device, firstly, the auxiliary frame 10 is hoisted to the construction position of the river channel, and the bottom end of the auxiliary frame 10 is inserted into the riverbed for fixing, and the auxiliary frame 10 is kept in a vertical state, with its top exposed above the water surface. Then, the cofferdam sleeve 1 is hoisted above the auxiliary frame 10, and the cofferdam sleeve 1 is sleeved on the outside of the auxiliary frame 10 and slowly dropped into the water, thereby completing the vertical splicing of multiple cofferdam sleeves 1 (refer to Fig.13 As shown). It should be noted that at this time, there is no water in the discharging cavity 2 of the cofferdam sleeve 1, and the top of the cofferdam sleeve 1 can float on the water surface. After multiple cofferdam sleeves 1 are vertically spliced, the cofferdam sleeve 1 located at the top is exposed (or semi-exposed) on the water surface due to the buoyancy of the multiple cofferdam sleeves 1, and the buoyancy block 5 inside the discharging cavity 2 is in a vertical state, and the buoyancy block 5 cannot rotate due to the limiting effect of the buoyancy limiting member 8, and the notch of the chuck 4 faces upward, and the chuck 4 cannot form a clamping state with the protruding rod 6.

[0036] After the multiple cofferdam sleeves 1 form a complete cofferdam structure (that is, the bottom end of the cofferdam sleeve 1 at the bottom is inserted into the silt layer of the river channel, and the cofferdam sleeve 1 at the top is exposed on the water surface), water is then injected into the material discharging cavity 2 of the multiple cofferdam sleeves 1 through the water guide pipe 202 until the water in the material discharging cavity 2 overflows through the top of the air guide pipe 201. At this time, due to the buoyancy of the water in the material discharging cavity 2, the floating block 801 in the buoyancy limiter 8 can float up, the clamping shaft 7 is not affected by the clamping effect of the clamping groove 802, and the buoyancy block 5 is rotated with the rotating shaft 3 as the axis under the action of the buoyancy, and the rotating shaft 3 and the chuck 4 are driven to rotate, so that the chuck 4 can be clamped on the outside of the protruding rod 6 (refer to Fig.10 and Fig.11 As shown), two adjacent cofferdam sleeves 1 are fixedly spliced ​​together.

[0037] After the multiple cofferdam sleeves 1 are fixedly spliced, a stable cofferdam structure can be formed. The river water inside the cofferdam sleeves 1 is pumped out, and then the auxiliary frame 10 is hoisted to the next construction site, and construction can be carried out inside the cofferdam structure.

[0038] When the construction is completed, it is necessary to dismantle the multiple cofferdam sleeves 1: pump out the water in the material discharging chamber 2 of the multiple cofferdam sleeves 1 through the water pipe 202. At this time, the bottom end of the buoyancy block 5 is no longer drooped by the buoyancy of the water, and at the same time drives the chuck 4 to rotate to a state where the notch faces upward. The chuck 4 and the protruding rod 6 are no longer in a clamping state, and the fixed splicing between the multiple cofferdam sleeves 1 can be released. In the actual construction process, the pumping order of the material discharging chamber 2 of the multiple cofferdam sleeves 1 can be adjusted, and the cofferdam sleeve 1 located at the top can be lifted out first (refer to Fig. 9 As shown in FIG. 1 ), multiple cofferdam sleeves 1 are sequentially floated on the water surface, and a small boat is used to drag the multiple cofferdam sleeves 1 to the next construction area, which is convenient for transportation and construction.

[0039] To sum up, the cofferdam device only needs to inject or pump water into the material discharging cavity 2 of multiple cofferdam sleeves 1 through the water pipe 202, which can not only control the floating or sinking state of multiple cofferdam sleeves 1, but also change the clamping state between the chuck 4 and the protruding rod 6, and at the same time change the limiting state of the buoyancy limiter 8 to the buoyancy block 5. During construction, combined with the above-mentioned corresponding states, it is not only convenient for the fixed splicing and dismantling work between multiple cofferdam sleeves 1, but also convenient for transportation and construction, thereby reducing the difficulty of construction and improving construction efficiency.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A water conservancy construction cofferdam device, comprising a plurality of cofferdam sleeves (1), wherein the top of the cofferdam sleeves (1) is provided with a boss portion (101), and the bottom of the cofferdam sleeves (1) is provided with a positioning groove (102) that matches the boss portion (101), and when the plurality of cofferdam sleeves (1) are vertically spliced, the positioning groove (102) of the cofferdam sleeve (1) located at the top is stuck above the boss portion (101) of the cofferdam sleeve (1) located at the bottom, characterized in that: A material discharging cavity (2) is provided inside the cofferdam sleeve (1), a plurality of rotating shafts (3) are rotatably connected to the top of the cofferdam sleeve (1), and the middle of the rotating shaft (3) passes through the top of the material discharging cavity (2), a chuck (4) is fixed at each end of the rotating shaft (3), a buoyancy block (5) is fixed on the outer surface of the rotating shaft (3), and the buoyancy block (5) is located in the material discharging cavity (2); A protruding rod (6) is provided directly below each of the chucks (4), and the protruding rod (6) is fixed to the bottom of the cofferdam sleeve (1). When a plurality of cofferdam sleeves (1) are vertically spliced, the chuck (4) of the cofferdam sleeve (1) at the bottom can be clamped on the protruding rod (6) of the cofferdam sleeve (1) at the top by rotating; The top of the material discharging chamber (2) is connected to an air guide pipe (201), and the bottom of the material discharging chamber (2) is connected to a water guide pipe (202). When there is no water in the material discharging chamber (2), the top of the cofferdam sleeve (1) can float on the water surface when it is in the water; when the water injection height in the material discharging chamber (2) reaches the height of the rotating shaft (3), the cofferdam sleeve (1) can be completely submerged in the water. A clamping shaft (7) is rotatably connected to one side of the buoyancy block (5), and a buoyancy limiting member (8) for limiting the position of the buoyancy block (5) is provided inside the material removal cavity (2).

2. A water conservancy construction cofferdam device according to claim 1, characterized in that: A floating block (9) is fixed to one end of the air guide pipe (201) away from the material discharging cavity (2), and an end of the water guide pipe (202) away from the material discharging cavity (2) is fixedly connected to the floating block (9).

3. A water conservancy construction cofferdam device according to claim 1, characterized in that: A sealing strip (103) is fixedly arranged inside the positioning groove (102), and a plurality of lifting ears (104) are fixedly arranged on the outer surface of the cofferdam sleeve (1).

4. A water conservancy construction cofferdam device according to claim 1, characterized in that: It also includes an auxiliary frame (10) for assisting the vertical splicing of the cofferdam sleeves (1); when a plurality of the cofferdam sleeves (1) are vertically spliced, they are slidably sleeved on the periphery of the auxiliary frame (10), and the cofferdam sleeves (1) cannot rotate on the periphery of the auxiliary frame (10).

5. A water conservancy construction cofferdam device according to claim 1, characterized in that: The buoyancy limiter (8) comprises a floating block (801), the bottom of the floating block (801) is arc-shaped, a slide plate (803) is fixed to the top of the floating block (801), a slide tube (804) is slidably sleeved on the outer surface of the slide plate (803), and the slide tube (804) is fixed to the inner wall of the material discharging cavity (2), and a clamping groove (802) adapted to the clamping shaft (7) is provided at the bottom of the floating block (801).

6. A water conservancy construction cofferdam device according to claim 1, characterized in that: A counterweight block (501) is fixed to the bottom of the buoyancy block (5), and the gravity of the counterweight block (501) is smaller than the buoyancy of the buoyancy block (5).

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