Settling system capable of reducing concentration of suspended sediment in tail water of overflow port of mud containing area

Abstract

The utility model relates to a sedimentation system capable of reducing the concentration of suspended sand in tail water of an overflow port of a mud containing area, which comprises a plurality of sections of flow guide channels arranged in a dredger-filled land parcel and distributed in a zigzag manner; and the plurality of sand accumulation grooves are formed in the dredger-filled land parcel, and the plurality of flow guide channels are sequentially connected through the plurality of sand accumulation grooves. According to the utility model, the plurality of sand accumulation grooves are matched with the plurality of sections of flow guide channels, so that when muddy water at a land block in hydraulic reclamation passes through a dredged and filled land block, the muddy water sequentially passes through the plurality of flow guide channels and the plurality of sand accumulation grooves to be matched, so that silt in the muddy water is precipitated, and the silt is continuously accumulated in the plurality of sand accumulation grooves along the way; by means of the structure, the amount of silt carried by muddy water can be fully controlled before the muddy water finally flows out of the overflow opening, it is finally guaranteed that the muddy water is discharged into seawater with the low silt concentration, and the post-treatment burden caused by silt accumulation at the overflow position can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of marine environmental protection, in particular to a sedimentation system capable of reducing the concentration of suspended sand in tail water of an overflow outlet of a mud receiving area. Background Art

[0002] The amount of dredged soil generated during the construction of large-scale water transport projects such as waterways is large. When it comes to filling onshore, how to reduce the concentration of suspended sediment at the overflow of the filling area is directly related to the impact of the filling construction on the water environment of the sea area. At present, the control of suspended sediment concentration mainly involves setting up anti-fouling curtains and other facilities at the overflow to fully intercept the suspended sediment and reduce the degree of diffusion. However, excessive or rapid accumulation of sediment at the overflow will still cause certain troubles for later treatment. The inventor believes that the most important solution to the problem of suspended sediment is to start from the filling area, and the key is to reasonably control the outflow of sediment in the filling area. To this end, the present application will provide a sedimentation system that can reduce the concentration of suspended sediment in the tail water of the overflow of the mud receiving area. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the following technical problems in the prior art: the problem of suspended sediment diffusion involved in the offshore reclamation process, the current technology does not have a reasonable and effective control of the sediment in the reclamation area, which brings certain difficulties to the subsequent muddy water entering the sea and the entire treatment process. In order to solve this technical problem, the utility model provides the following technical solutions:

[0005] A sedimentation system capable of reducing the suspended sediment concentration of tailwater at an overflow port of a mud receiving area is applied to a filling area, wherein the filling area includes a land parcel being filled and a land parcel that has been filled. The system comprises:

[0006] A plurality of diversion channels are arranged in the filled land, wherein the plurality of diversion channels are zigzag distributed among each other;

[0007] A plurality of sand accumulation troughs are arranged in the filled land, and the plurality of diversion channels are connected in sequence through the plurality of sand accumulation troughs;

[0008] Among the plurality of diversion channels connected in sequence, two diversion channels located at the head and the tail respectively connect the land block being filled with the overflow port.

[0009] As an optimal technical solution for a sedimentation system that can reduce the suspended sediment concentration in the tailwater of the overflow outlet of the mud receiving area, the sand accumulation trough includes two first retaining walls and a second retaining wall, and an accumulation area located between the first retaining wall and the second retaining wall, and the first retaining wall and the second retaining wall are respectively connected to two sections of diversion channels.

[0010] As an optimal technical solution for a sedimentation system that can reduce the suspended sediment concentration in the tail water of the overflow outlet of the mud receiving area, it also includes a permeable material laid at the bottom of the accumulation area, and its sides extend to fit the first retaining wall and the second retaining wall.

[0011] As a preferred technical solution for a sedimentation system capable of reducing the suspended sediment concentration in tail water of an overflow outlet of a mud receiving area, the permeable material comprises a cloth body or a mesh layer.

[0012] As an optimal technical solution for a sedimentation system that can reduce the suspended sand concentration in the tail water of the overflow outlet of the mud receiving area, the mud water passes through the first retaining wall and the second retaining wall in sequence when passing through the sand accumulation trough. A feeding port is constructed in the sand accumulation trough at least on the first retaining wall, and its height is lower than the bottom height of the diversion channel. A feeding channel is arranged at the end of the feeding port opposite to the accumulation area, and the feeding channel extends to the soil surface.

[0013] As an optimal technical solution for a sedimentation system that can reduce the suspended sediment concentration in the tailwater of the overflow outlet of the mud receiving area, the top height of the first retaining wall is flush with the bottom of the diversion channel, the height of the second retaining wall is higher than the height of the first retaining wall, and the part higher than the first retaining wall is a through structure, and an interception net is arranged at the through point.

[0014] As an optimal technical solution for a sedimentation system that can reduce the suspended sediment concentration in the tailwater of the overflow outlet of the mud receiving area, the depth of the diversion channel is 1-2 meters, and the vertical drop between the bottom of the accumulation area and the bottom of the diversion channel is 3-5 meters.

[0015] As a preferred technical solution for a sedimentation system capable of reducing the suspended sediment concentration in tailwater at an overflow outlet of a mud receiving area, the first retaining wall and the second retaining wall are brick structures and / or stone structures.

[0016] The sedimentation system provided by the utility model can reduce the concentration of suspended sand in the tail water of the overflow outlet of the mud receiving area, and has the beneficial effect that: through the cooperation of multiple sand accumulation troughs and multiple sections of diversion channels, when the muddy water at the land being filled passes through the filled land, the muddy water will pass through the multiple diversion channels in sequence, and the cooperation of the multiple sand accumulation troughs allows the mud in the muddy water to be precipitated, thereby continuously accumulating in the multiple sand accumulation troughs along the way, so that before the muddy water finally flows out of the overflow outlet, the amount of mud carried by the muddy water can be fully controlled, and finally it is ensured that it is discharged into the seawater with a lower sand concentration, so that the burden of later treatment caused by the accumulation of mud at the overflow can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 This is a plan layout diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the longitudinal structure of the sand accumulation trough in the utility model.

[0020] Figure numerals: 1. diversion channel; 2. sand accumulation trough; 201. first retaining wall; 202. second retaining wall; 203. accumulation area; 3. permeable material; 4. feeding port; 5. feeding channel; 6. interception net. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] Reference Figure 1 An embodiment of the utility model provides a sedimentation system capable of reducing the suspended sediment concentration of tail water at the overflow port of the mud receiving area. The system is used to intercept and process the mud water flowing out of the filling area. The filling area can be divided into a filling plot and a filled plot according to the filling progress. The system includes the following parts:

[0026] A plurality of diversion channels 1 are arranged in the filled land. The diversion channels 1 are groove-shaped structures. The inner wall and the bottom thereof can be simply waterproofed using geotextiles or waterproof membranes. The depth of the diversion channels 1 can be set between 1 and 2 meters, so as to fully ensure that the water will not flow to the soil surface when the maximum amount of water flows through, and at the same time, the construction difficulty will not be increased too much. The plurality of diversion channels 1 are zigzag distributed. The zigzag distribution can be, for example, a curved distribution or a horizontal and vertical distribution. The horizontal and vertical distribution is shown in the figure for reference;

[0027] A plurality of sand accumulation grooves 2 are arranged in the filled land, and the plurality of diversion channels 1 are connected in sequence through the plurality of sand accumulation grooves 2, and the depth of the sand accumulation grooves 2 needs to be multiple times greater than the depth of the diversion channel 1;

[0028] Based on the above, among the multiple diversion channels 1 connected in sequence, the two diversion channels 1 located at the head and the tail are respectively connected to the land being filled and the overflow port, so as to ensure that the muddy water discharged from the land being filled passes through the multiple diversion channels 1 in sequence and then reaches the overflow port for discharge;

[0029] The flow direction of muddy water in the entire filling area is as follows Figure 1 As shown by the middle arrow, the utility model processes the suspended sediment contained in the water flow as follows: when muddy water flows out from the filled land and passes through a plurality of diversion channels 1 in sequence, the suspended sediment in the water flow is driven by the water flow and passes through a plurality of sand accumulation troughs 2 in sequence. When the sediment passes through the sand accumulation trough 2, it settles downward due to gravity. The tortuous distribution between the plurality of diversion channels 1 is conducive to slowing down the speed of the water flow, thereby providing sufficient falling time for the sediment when passing through the sand accumulation trough 2. The sediment that has not settled to the bottom will continue to form sediment when it passes through the subsequent sand accumulation trough 2 driven by the water flow, thereby continuously collecting the sediment in the water flow through the cooperation of the plurality of sand accumulation troughs 2 to ensure that the amount of suspended sediment contained in the water flow can be fully controlled before the water flow is finally discharged from the overflow port, so that when discharged into the sea, too much sediment will not be brought to the overflow port, thereby effectively reducing the burden of subsequent sediment treatment work at the overflow port.

[0030] Further, see Figure 2 The sand accumulation trough 2 includes two first retaining walls 201 and a second retaining wall 202, and an accumulation area 203 formed between the first retaining wall 201 and the second retaining wall 202. The accumulation area 203 is used to provide an accumulation place for the falling mud and sand. The height difference between the bottom of the accumulation area 203 and the bottom of the guide channel can be set between 3-5 meters, so as to ensure a certain water storage depth for mud and sand to settle. The first retaining wall 201 and the second retaining wall 202 are respectively connected to the ends of the two guide channels 1 connected at the head and tail of the entire sand accumulation trough 2. The flow direction of mud and water in the entire sand accumulation trough 2 is as follows: Figure 2As shown by the arrow in the middle, muddy water flows from Figure 2 From the perspective, the water enters the accumulation area 203 from the left side and then flows away from the right side. The first retaining wall 201 and the second retaining wall 202 can respectively provide support and abutment for the earth on both sides, thereby reducing the phenomenon of sand on the earth being lost with mud and water. For the production of the first retaining wall 201 and the second retaining wall 202, a brick structure or a stone structure can be used to ensure a simple construction process while having a certain strength to resist water flow impact.

[0031] Further, see Figure 2 The utility model also includes a permeable material 3 laid at the bottom of the accumulation area 203. The permeable material 3 can allow water to pass through and can intercept silt. The sides of the permeable material 3 extend to fit the first retaining wall 201 and the second retaining wall 202. Through the cooperation of the permeable material 3, the silt can eventually be accumulated on the permeable material 3. Therefore, when the amount of silt accumulated in the accumulation area 203 is large and needs to be cleaned, the permeable material 3 can be directly taken out and the silt can be poured into the filled land, and then put back into the accumulation area 203. When the permeable material 3 is taken out, the water can directly pass through it and will not be brought out, so that the water remains in the accumulation area 203. This design further simplifies the cleaning process of the silt in the sand accumulation trough 2.

[0032] Furthermore, the water-permeable material 3 can be made of materials such as cloth or mesh layer, so as to ensure a certain material strength while meeting the water-permeable property.

[0033] Further, see Figure 2 When the muddy water passes through the sand accumulation trough 2, the direction in which it flows through the sand accumulation trough 2 is first through the first retaining wall 201 and then through the second retaining wall 202. In the sand accumulation trough 2, at least on the first retaining wall 201, a feeding port 4 is constructed, and its height is lower than the bottom height of the diversion channel 1. A feeding channel 5 is provided at the end of the feeding port 4 opposite to the accumulation area 203, which extends to the soil surface. The feeding channel 5 can be made of a pipe. Through the cooperation of the feeding channel 5, flocculant can be sprinkled into the inside thereof, so that the flocculant enters the accumulation area 203 to promote the rapid coagulation of suspended mud in the water body in the accumulation area 203, thereby increasing the sedimentation rate, so as to further improve the collection effect of suspended mud. The closer to the upper part of the accumulation area 203, the position is flush with the diversion channel 1, so the water flow rate is relatively faster. The feeding port 4 is lower than the height of the diversion channel 1, so that the flocculant is not easily carried away by the water flow after entering the accumulation area 203.

[0034] Further, see Figure 2The top height of the first retaining wall 201 is flush with the bottom of the diversion channel 1, and the height of the second retaining wall 202 is higher than that of the first retaining wall 201. The portion higher than the first retaining wall 201 is a through structure, and an interception net 6 is arranged at the through position to intercept. The interception net 6 makes it difficult for the coagulated large lumps of silt to continue to flow to the downstream position, thereby further increasing the collection effect of the single sand accumulation trough 2 on silt.

[0035] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area, applied to the filling area, wherein the filling area includes the land being filled and the land that has been filled, characterized in that: The system comprises: A plurality of diversion channels (1) are arranged in the filled land, wherein the plurality of diversion channels (1) are zigzag distributed among each other; A plurality of sand accumulation troughs (2) are arranged in the filled land block, and the plurality of diversion channels (1) are connected in sequence through the plurality of sand accumulation troughs (2); Among the plurality of diversion channels (1) connected in sequence, two diversion channels (1) located at the head and the tail respectively connect the land block being filled with the overflow port.

2. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 1 is characterized in that: The sand accumulation trough (2) comprises two first retaining walls (201) and a second retaining wall (202), and an accumulation area (203) located between the first retaining wall (201) and the second retaining wall (202), wherein the first retaining wall (201) and the second retaining wall (202) are respectively connected to two sections of the diversion channel (1).

3. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 2 is characterized in that: It also includes a water-permeable material (3) laid on the bottom of the accumulation area (203), the sides of which extend to fit the first retaining wall (201) and the second retaining wall (202).

4. The sedimentation system capable of reducing the suspended sediment concentration in the tail water of the overflow port of the mud receiving area according to claim 3 is characterized in that: The water-permeable material (3) comprises a cloth body or a mesh layer.

5. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 2 is characterized in that: When the muddy water passes through the sand accumulation trough (2), it passes through the first retaining wall (201) and the second retaining wall (202) in sequence. In the sand accumulation trough (2), at least on the first retaining wall (201), a feeding port (4) is constructed, and its height is lower than the bottom height of the diversion channel (1). A feeding channel (5) is provided at one end of the feeding port (4) opposite to the accumulation area (203), and the feeding channel (5) extends to the soil surface.

6. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 5 is characterized in that: The top height of the first retaining wall (201) is flush with the bottom of the diversion channel (1), and the height of the second retaining wall (202) is higher than that of the first retaining wall (201). The portion of the second retaining wall (202) higher than the first retaining wall (201) is a through structure, and an interception net (6) is arranged at the through position.

7. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 2, characterized in that: The depth of the diversion channel (1) is 1-2 meters, and the vertical drop between the bottom of the accumulation area (203) and the bottom of the diversion channel (1) is 3-5 meters.

8. The sedimentation system capable of reducing the suspended sediment concentration in the tailwater of the overflow port of the mud receiving area according to claim 2, characterized in that: The first retaining wall (201) and the second retaining wall (202) are brick-built structures or stone-built structures.

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