Method for controlling suspended sediment under complex wave flow conditions

Abstract

The application discloses a kind of complex wave flow conditions under suspended sediment control method, belong to suspended sediment control technical field, including erecting temporary platform, temporary platform sets avoidance groove, in avoidance groove is carried out steel pipe pile each hammering, multiple steel pipe piles form steel cofferdam, when steel pipe pile hammering is controlled suspended sediment by suction filtration device;Suction filtration device includes following trolley and cover body, cover body is set to the lower end of steel pipe pile, filter box is set on the following trolley upper side, following trolley side is fixedly connected with support rod, support rod is fixedly connected with pipe hanger, pipe hanger one end is fixedly connected with filter box, pipe hanger is inserted into cover body and is fixedly connected with cover body.The application is purified by being drawn into filter box with the suspended sediment of construction together with part of water body, and the water after purification is discharged to water body, on the one hand, cover body slows down the flow of water body and causes the flow of construction suspended sediment, on the other hand, suspended sediment is immediately drawn away and purified, to avoid polluting water body.

Description

Technical Field

[0001] The present invention relates to the technical field of suspended sediment control, and in particular to a method for controlling suspended sediment under complex wave and current conditions. Background Art

[0002] Complex wave flow usually refers to the fluid movement phenomenon formed by the superposition of multiple waves with different frequencies, amplitudes and directions, which is commonly found in natural environments such as the ocean, atmosphere, and rivers. During the construction of steel cofferdams, steel pipe piles or steel sheet piles need to be inserted into the riverbed or seabed by hammering. The impact of the steel pipe piles or steel sheet piles with the sediment causes the sediment to be suspended. The sediment then flows rapidly with the water flow and diffuses into the water body, reducing the transparency of the water body and having a certain degree of impact on organisms and aquaculture. Therefore, a device for controlling the suspension of construction sediment is needed to overcome the environmental impact brought about by construction. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a method for controlling suspended sediment under complex wave and flow conditions, thereby solving the problems of the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for controlling suspended sediment under complex wave and current conditions includes setting up a temporary platform, providing an avoidance trough on the temporary platform, hammering steel pipe piles one by one in the avoidance trough, and combining multiple steel pipe piles to form a steel cofferdam. Suspended sediment is controlled by a suction and filtration device during the hammering of the steel pipe piles.

[0006] The suction filtering device includes a follower trolley and a cover body. The cover body is arranged corresponding to the lower end of the steel pipe pile. A filter box is arranged on the upper side of the follower trolley. One side of the follower trolley is fixedly connected to the support rod, the support rod is fixedly connected to the hanging pipe, one end of the hanging pipe is fixedly connected to the filter box, and the hanging pipe extends into the cover body and is fixedly connected to the cover body.

[0007] Preferably, the cover body includes a middle arc segment, and edge arc segments are provided at both ends of the middle arc segment. The middle arc segment and the two edge arc segments are combined to form a "C"-shaped cover body. A number of circular holes are opened on the cover body, and a rubber plate is fixedly connected to the inner arc surface side of the cover body, and one side edge of the rubber plate is fixedly connected to the inner wall of the cover body.

[0008] Preferably, the middle arc segment and the edge arc segment are connected in a detachable structure.

[0009] Preferably, the bottom of the support rod is fixedly connected to the suspension rod, a guide hole is provided at the lower end of the suspension rod, a sliding rod is vertically slidably connected in the guide hole, a suspension spring is fixedly connected between the upper end of the sliding rod and the guide hole, the lower end of the sliding rod is fixedly connected to an arc-shaped guide block, and the inner arc surface of the guide block is fixedly connected to the electromagnet.

[0010] Preferably, the lower end of the hanging pipe is fixedly connected to the arc-shaped pipe, and the two ends of the bottom of the arc-shaped pipe are respectively fixedly connected to a water suction head;

[0011] The bottom of the arc tube is fixedly connected to the vertical rod, the lower end of the vertical rod is fixedly connected to the tube body, a pull rod is coaxially arranged in the tube body, the lower end of the pull rod is fixedly connected to the circular plate, one side of the tube body is fixedly connected to the branch pipe, the lower end of the branch pipe is fixedly connected to the arc suction head, and the arc suction head is arranged corresponding to the steel pipe pile;

[0012] The upper end of the tube body is fixedly connected to a cover plate, which is provided with a discharge hole. The upper side of the cover plate is rotatably connected to a blocking plate, which blocks the discharge hole. The pull rod on the circular plate is intermittently raised and lowered in the tube body by a driving device.

[0013] Preferably, one side of the arc tube is fixedly connected to the box body, the pull rod extends into the box body and a rotating rod is provided on one side, a first spring is fixedly connected between the upper end of the pull rod and the top wall of the box body, the sliding rod slides vertically on one side of the box body and is provided with a tooth groove, the box body is rotatably connected to the gear, and one side of the gear is rotatably connected to the one-way toggle rod, the one-way toggle rod pushes the rotating rod upward when it rotates with the gear and can rotate to avoid the rotating rod when the one-way toggle rod is downward relative to the rotating rod.

[0014] Preferably, the end of the support rod is fixedly connected to the guide arc plate.

[0015] The advantages of the present invention are as follows: the method for controlling suspended sediment under complex wave and flow conditions provided by the present invention surrounds the position where the steel pipe pile impacts the riverbed through a cover body, and by pumping water inside the cover body, the water body mixed with suspended sediment in the cover body is pumped out to form a cavity, and the water body outside the cover body enters the cover body for replenishment, and the suspended sediment generated during construction is combined with part of the water body and pumped into the filter box for purification, and the purified water is discharged back into the water body. On the one hand, the cover body slows down the flow of water body and causes the flow of suspended sediment during construction, and on the other hand, the generated suspended sediment is immediately pumped out for purification to avoid polluting the water body.

[0016] The present invention does not require a high-load water pump to pump water. The suspended sediment generated by piling is gathered by utilizing the impact inertia of piling. The arc-shaped suction head efficiently gathers the suspended sediment generated at the moment of impact. The suspended sediment is quickly sucked into the middle of the cover body and then centrally extracted, which fully controls the construction sediment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a basic structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the connection structure between the follower trolley and the cover body;

[0019] Figure 3 Schematic diagram of the structure of the internal components of the cover;

[0020] Figure 4is a schematic diagram of the suspended sediment suction principle in Example 3;

[0021] Figure 5 It is a schematic diagram of the structure for pumping out suspended sediment in the pipe body. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention 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 the present invention and are not intended to limit the present invention. Example 1

[0023] like Figures 1 to 5 As shown, the present invention provides a method for controlling suspended sediment under complex wave and current conditions, comprising setting up a temporary platform 1, providing an avoidance trough 11 on the temporary platform 1, hammering steel pipe piles 10 one by one in the avoidance trough 11, and enclosing multiple steel pipe piles 10 to form a steel cofferdam. When the steel pipe piles 10 are hammered, a suction and filtration device is used to control the suspended sediment.

[0024] The suction filtering device includes a follower trolley 2 and a cover 3. The follower trolley 2 carries the cover 3 and changes its position along with the construction position of the steel pipe pile 10. The cover 3 is set corresponding to the lower end of the steel pipe pile 10. A filter box is set on the upper side of the follower trolley 2. The silt is separated in the filter box by the existing technical method, such as the flocculation sedimentation method. The specific principle is the existing technology or equipment and will not be repeated here. One side of the follower trolley 2 is fixedly connected to the support rod 41, and the end of the support rod 41 is fixedly connected to the guide arc plate 411. When the support rod 41 is fixedly connected to the guide arc plate 411 on both sides of the steel pipe pile 10, the filter box is provided with a filter box. When the suction and filtering device is arranged separately, a channel for hammering the steel pipe pile 10 is formed between the two guide arc plates 411, which plays a guiding role. The support rod 41 is fixedly connected to the hanging pipe 42, and one end of the hanging pipe 42 is fixedly connected to the filter box. The hanging pipe 42 extends into the cover body 3 and is fixedly connected to the cover body 3. The distance between the cover body 3 and the riverbed is 50-100mm. At the same time, there is a gap between the cover body 3 and the steel pipe pile 10 to adapt to the entry of external water into the cover body 3. The specific gap is determined according to the hydrological conditions, such as the water flow rate test, to formulate an economical construction process.

[0025] Two groups of suction and filtering devices are set up, which are arranged on both sides of the steel pipe piles 10. For the convenience of explanation and understanding, the present invention only illustrates the suction and filtering devices on one side with drawings and explains the working principle. The steel pipe piles 10 are surrounded to form a steel cofferdam. When a single steel pipe pile 10 is hammered into the riverbed, the cover body 3 surrounds the steel pipe pile 10 to impact the riverbed position. By pumping water inside the cover body 3, the water mixed with suspended sediment in the cover body 3 is extracted to form a cavity, and the water outside the cover body 3 enters the cover body 3 for replenishment. The suspended sediment generated during construction is combined with part of the water body and pumped into the filter box for purification. The purified water is discharged back into the water body. On the one hand, the cover body 3 slows down the flow of water and causes the flow of suspended sediment during construction. On the other hand, the generated suspended sediment is immediately pumped away and purified to avoid polluting the water body. Example 2

[0026] like Figures 1 to 5 As shown, the cover body 3 includes a middle arc segment 31, and edge arc segments 32 are provided at both ends of the middle arc segment 31. The middle arc segment 31 and the two edge arc segments 32 are combined to form a "C"-shaped cover body 3. A number of circular holes 33 are opened on the cover body 3, and a rubber plate is fixedly connected to the inner arc surface side of the cover body 3, and one side edge of the rubber plate is fixedly connected to the inner wall of the cover body 3. The water body inside the cover body 3 is extracted to form a cavity, and the external water pressure pushes the rubber plate open and enters the cover body 3. On the one hand, the cover body 3 has the effect of reducing the diffusion of suspension caused by the impact of pile driving. On the other hand, through the flow of water, it is convenient to extract and purify the suspended sediment mixed water body.

[0027] The middle arc segment 31 and the edge arc segment 32 are connected by a detachable structure, such as a common detachable structure such as a slot, a bolt, etc., which is selected according to the degree of encirclement of the steel cofferdam (for example, after the steel cofferdam is about to be enclosed, only a local area outside the steel cofferdam needs to be covered). When it is necessary to disassemble the middle arc segment 31 and the inner side (near the center of the steel cofferdam) edge arc segment 32, the hanging pipe 42 is disassembled from the filter box, and the fastening bolts between the upper end of the hanging rod 5 and the support rod 41 are removed. The middle arc segment 31 and the edge arc segment 32 are lifted to the height of the temporary platform 1 and then disassembled. Example 3

[0028] like Figures 1 to 5 As shown, the bottom of the support rod 41 is fixedly connected to the suspension rod 5, and a guide hole is set at the lower end of the suspension rod 5. The sliding rod 51 is vertically slidably connected in the guide hole. The upper end of the sliding rod 51 is fixedly connected to the guide hole. A suspension spring is fixedly connected to the guide hole. The lower end of the sliding rod 51 is fixedly connected to an arc-shaped guide block 52. The inner arc surface of the guide block 52 is fixedly connected to an electromagnet. The electromagnet adsorbs the steel pipe pile 10. The guide arc plate 411 forms a limit guide on the upper part of the steel pipe pile 10. The guide block 52 performs a limit guide at the lower end of the steel pipe pile 10 to prevent the over-long steel pipe pile 10 from being hammered into the position deflected. The guide block 52 adsorbs the steel pipe pile 10 and follows the steel pipe pile 10 to sink, and disconnects the adsorption after the steel pipe pile 10 sinks into place.

[0029] The lower end of the hanging pipe 42 is fixedly connected to the arc-shaped pipe 43, and the two ends of the bottom of the arc-shaped pipe 43 are respectively fixedly connected to a water suction head 44;

[0030] The bottom of the arc tube 43 is fixedly connected to a vertical rod 45, the lower end of the vertical rod 45 is fixedly connected to a tube body 46, a pull rod 47 is coaxially arranged in the tube body 46, the lower end of the pull rod 47 is fixedly connected to a circular plate 48, one side of the tube body 46 is fixedly connected to a branch pipe 49, the lower end of the branch pipe 49 is fixedly connected to an arc-shaped suction head 491, and the arc-shaped suction head 491 is provided corresponding to the steel pipe pile 10;

[0031] The upper end of the pipe body 46 is fixedly connected to the cover plate 461, and the cover plate 461 is provided with a discharge hole 462. The upper side of the cover plate 461 is rotatably connected to the blocking plate 463, and the blocking plate 463 blocks the discharge hole 462 by gravity or a torsion spring. The pull rod 47 on the circular plate 48 is intermittently raised and lowered in the pipe body 46 by the driving device to spray the water in the pipe body 46 toward the water suction head 44. The branch pipe 49 is provided with a one-way structure (such as the cover plate 461, the discharge hole 462 and the blocking plate 463), so that the water in the pipe body 46 can only be discharged from the branch pipe 49 to the pipe body 46. 6, the circular plate 48 pushes the water 30 stored in the pipe body 46 upward, and the stored water 30 is discharged from the discharge hole 462. When the circular plate 48 descends, the blocking plate 463 closes the discharge hole 462 due to gravity. During the descending process of the circular plate 48, the water mass 20 surrounding the intersection of the steel pipe pile 10 and the riverbed is pumped into the pipe body 46, targeting the suspended sediment excited at the moment of pile driving and quickly gathering it at the position of the water suction head 44. The water suction head 44 does not need to quickly pump out the water in the cover body 3, saving energy consumption;

[0032] One side of the arc tube 43 is fixedly connected to the box body 6, the pull rod 47 extends into the box body 6 and is provided with a rotating rod 61 on one side, the upper end of the pull rod 47 is fixedly connected to the top wall of the box body 6, the sliding rod 51 slides vertically on one side of the box body 6 and is provided with a tooth groove 63, the box body 6 is rotatably connected to the gear 64, and one side of the gear 64 is rotatably connected to the one-way toggle rod 641, the one-way toggle rod 641 pushes the rotating rod 61 upward when rotating with the gear 64 and can rotate to avoid the rotating rod 61 when the one-way toggle rod 641 is downward relative to the rotating rod 61. The one-way toggle rod 641 is a prior art structure. The one-way toggle rod 641 can rotate clockwise but cannot rotate counterclockwise, and is reset by a spring structure, etc.

[0033] In Example 3, the guide block 52 is limited and guided at the lower end of the steel pipe pile 10. The guide block 52 is adsorbed on the side of the steel pipe pile 10 and then hammered down. During the intermittent sinking of the steel pipe pile 10 and the guide block 52, the sliding rod 51 drives the gear 64 to rotate at intervals. The one-way toggle rod 641 on one side of the gear 64 pulls the pull rod 47 upward, and the water in the tube 46 is sprayed toward the middle of the cover 3. The suspended sediment generated at the moment of piling is concentrated in the cover 3. When pumping water in the middle of the cover 3, The water without sediment on the outside is constantly replenished to avoid the diffusion of sediment. The suspended sediment at the moment of piling will not be sucked out because it is too low. There will be no separate covering water mass 20, and the suspended sediment escaping in the gap cannot be managed. The present invention generates sediment in the process of hammering the steel pipe pile 10. At the same time, the sediment generated is guided and limited. The pipe body 46 is cleverly designed to target the timing of the generation of suspended sediment, and the water mass 20 with a large amount of suspended sediment is first concentrated in the middle of the cover body 3, thereby effectively managing the suspended sediment generated during construction.

[0034] After the one-way toggle rod 641 moves away from the rotating rod 61 , the pull rod 47 is reset by the first spring 62 . By alternating the above actions, the suspended sediment generated by piling is first gathered in the tube 46 and then discharged to the middle of the cover 3 .

[0035] The present invention follows the path of steel cofferdam construction, through a leveler (a device in the prior art that levels the riverbed to facilitate hammering of steel pipe piles), followed by a trolley 2 and a "C"-shaped cover 3 following the leveler. The cover 3 is 50-100mm away from the leveled riverbed, and water is pumped out to purify the sediment disturbed by the construction.

[0036] A pile hammer is used to clamp and hammer the steel pipe pile 10, and the "C"-shaped cover 3 follows the position where the steel pipe pile 10 is inserted to perform water extraction and purification.

[0037] A single hammering of the steel pipe pile 10 occurs in an instant, so there is no need for the water pump in the filter box to perform high-flow suction. On this basis, the follower trolley 2 can only be equipped with one water pump. The water pump suction is coordinated with the hammering of the steel pipe pile 10 through existing control technology (such as inverter, servo motor), which is convenient for following the changes in the construction position of the steel pipe pile 10. A temporary sedimentation box is set on the temporary platform 1, and a hose is set between the sedimentation box and the water pump of the follower trolley 2. The water mass with a high sediment content generated at the moment of piling is pumped into the sedimentation box. There is no need for the water pump to pump water at high load. The suspended sediment generated by piling is gathered by the impact inertia of piling. The arc-shaped suction head 491 efficiently gathers the suspended sediment generated at the moment of impact, and the suspended sediment is quickly sucked into the middle of the cover body 3, and then concentratedly extracted, which fully controls the construction sediment.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for controlling suspended sediment under complex wave and current conditions, comprising: setting up a temporary platform (1), providing an avoidance trough (11) on the temporary platform (1), hammering steel pipe piles (10) one by one in the avoidance trough (11), and enclosing a plurality of steel pipe piles (10) to form a steel cofferdam; and controlling suspended sediment by a suction and filtering device when the steel pipe piles (10) are hammered; characterized in that: The suction filtering device comprises a follower trolley (2) and a cover body (3), wherein the cover body (3) is arranged corresponding to the lower end of the steel pipe pile (10), and a filter box is arranged on the upper side of the follower trolley (2), one side of the follower trolley (2) is fixedly connected to a support rod (41), the support rod (41) is fixedly connected to a hanging pipe (42), one end of the hanging pipe (42) is fixedly connected to the filter box, and the hanging pipe (42) extends into the cover body (3) and is fixedly connected to the cover body (3).

2. The method for controlling suspended sediment under complex wave and current conditions according to claim 1, characterized in that: The cover body (3) includes a middle arc segment (31), and edge arc segments (32) are provided at both ends of the middle arc segment (31). The middle arc segment (31) and the two edge arc segments (32) are combined to form a "C"-shaped cover body (3). A plurality of circular holes (33) are provided on the cover body (3), and a rubber plate is fixedly connected to the inner arc surface side of the cover body (3), and one side edge of the rubber plate is fixedly connected to the inner wall of the cover body (3).

3. The method for controlling suspended sediment under complex wave and current conditions according to claim 2, characterized in that: The middle arc segment (31) and the edge arc segment (32) are connected in a detachable structure.

4. The method for controlling suspended sediment under complex wave and current conditions according to claim 1, characterized in that: The bottom of the support rod (41) is fixedly connected to the suspension rod (5), a guide hole is provided at the lower end of the suspension rod (5), a sliding rod (51) is vertically slidably connected in the guide hole, a suspension spring is fixedly connected between the upper end of the sliding rod (51) and the guide hole, and the lower end of the sliding rod (51) is fixedly connected to an arc-shaped guide block (52), and the inner arc surface of the guide block (52) is fixedly connected to the electromagnet.

5. The method for controlling suspended sediment under complex wave and current conditions according to claim 4, characterized in that: The lower end of the hanging pipe (42) is fixedly connected to the arc-shaped pipe (43), and the two ends of the bottom of the arc-shaped pipe (43) are respectively fixedly connected to a water suction head (44); The bottom of the arc tube (43) is fixedly connected to the vertical rod (45), the lower end of the vertical rod (45) is fixedly connected to the tube body (46), a pull rod (47) is coaxially arranged in the tube body (46), the lower end of the pull rod (47) is fixedly connected to the circular plate (48), one side of the tube body (46) is fixedly connected to the branch pipe (49), the lower end of the branch pipe (49) is fixedly connected to the arc suction head (491), and the arc suction head (491) is arranged corresponding to the steel pipe pile (10); The upper end of the tube body (46) is fixedly connected to a cover plate (461), and the cover plate (461) is provided with a discharge hole (462). The upper side of the cover plate (461) is rotatably connected to a blocking plate (463), and the blocking plate (463) blocks the discharge hole (462). The pull rod (47) on the circular plate (48) is intermittently raised and lowered in the tube body (46) through a driving device.

6. The method for controlling suspended sediment under complex wave and current conditions according to claim 5, characterized in that: One side of the arc tube (43) is fixedly connected to the box body (6), the pull rod (47) extends into the box body (6) and is provided with a rotating rod (61) on one side, the upper end of the pull rod (47) is fixedly connected to the top wall of the box body (6), the sliding rod (51) slides vertically on one side of the box body (6) and is provided with a tooth groove (63), and is rotatably connected to a gear (64) in the box body (6), and one side of the gear (64) is rotatably connected to a one-way toggle rod (641), and the one-way toggle rod (641) pushes the rotating rod (61) upward when rotating with the gear (64) and can rotate away from the rotating rod (61) when the one-way toggle rod (641) is downward relative to the rotating rod (61).

7. The method for controlling suspended sediment under complex wave and current conditions according to claim 1, characterized in that: The end of the support rod (41) is fixedly connected to the guide arc plate (411).

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