Underwater dredging method using secondary turbidity
By acquiring and preprocessing topographic and hydrological data, the timing and sequence of dredging were determined. By using crushing devices and propulsion lifters to create secondary turbid water bodies, the problems of large dredging vessels and silt stirring up were solved, achieving efficient and flexible underwater dredging operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TIANJIN SPATIOTEMPORAL JINGWEI INFORMATION TECH CO LTD
- Filing Date
- 2026-04-27
- Publication Date
- 2026-06-12
AI Technical Summary
In existing dredging technologies, dredging vessels are large and not flexible enough, affecting other vessels. Furthermore, during the dredging process, silt is stirred up and re-sedied, resulting in poor dredging effectiveness.
By acquiring and preprocessing topographic and hydrological data, the time interval and operation sequence for dredging are determined. A crushing device is used to break up the silt and a propulsion lifter is used to create a secondary turbid water body, avoiding interference from surface vessels and using water flow to carry away the silt.
It improved the dredging effect, avoided the impact on other ships, ensured that the silt would not settle again, and enhanced the flexibility and efficiency of dredging.
Smart Images
Figure CN122190177A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of underwater dredging operations, and more specifically, to an underwater dredging operation method utilizing secondary turbidity. Background Technology
[0002] With the continuous development of economic globalization, water transport, as a crucial means of logistics and transportation supporting globalization, is directly related to the security of economic globalization through its stability. Ports and waterways, as the infrastructure of water transport, require excellent navigation conditions. However, during the operation of ports and waterways, the continuous accumulation of underwater silt can lead to problems such as shallowing of waterways and shrinkage of port areas, severely affecting the passage of ships. Therefore, underwater dredging plays a vital role in maintaining the stability of water transport.
[0003] However, existing dredging technologies, such as mechanical dredgers, while removing silt to some extent, still have the following problems: on the one hand, the dredging vessels used are often large and not flexible enough, which can affect other vessels during the dredging process; on the other hand, the dredging vessels can cause silt to be stirred up and redeposited in other areas during the dredging process, making it impossible to guarantee the dredging effect.
[0004] Therefore, the existing technology has defects and urgently needs improvement. Summary of the Invention
[0005] In view of the above problems, the purpose of this invention is to provide an underwater dredging method utilizing secondary turbidity to solve the problems in the prior art. On the one hand, during the dredging process, the vessels used for dredging are often large and not flexible enough, which can affect other vessels. On the other hand, the vessels used for dredging can cause silt to be stirred up and re-sedied in other areas during the dredging process, making it impossible to guarantee the dredging effect.
[0006] This invention provides a method for underwater dredging operations utilizing secondary turbidity treatment, comprising: Step S1: Obtain topographic and hydrological data of the underwater operation area, and preprocess the topographic and hydrological data to obtain standard topographic and standard hydrological data. Step S2: Determine the time interval for dredging operations based on the standard hydrological data, determine the silt height and silt distribution in the underwater operation area based on the standard topographic data, determine the operation sequence, and generate an operation plan. Step S3: In response to the start of the dredging operation, the crushing device crushes the silt in the work area to obtain turbid water. Step S4: Activate the propulsion suspension device to mix the primary turbid water with the shallow water to form secondary turbid water.
[0007] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, preprocessing topographic data to obtain standard topographic data includes: screening outlier data, supplementing missing values, and smoothing. Preprocessing hydrological data to obtain standard hydrological data includes data calibration and alignment of time series.
[0008] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, the step of determining the time interval for dredging operations based on the standard hydrological data includes: Based on the standard hydrological data, the time interval between the start of ebb tide and the start of high tide is determined and recorded as the first interval; Based on historical navigation information, the route area is determined, and the water velocity distribution within the route area changes over time. Based on the first interval and the water velocity distribution within the route area changes over time, the time interval for dredging operations is determined.
[0009] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, the time interval for dredging operations is determined based on the changes in water flow velocity distribution over time within the first interval and the route area. The time interval for dredging operations is selected from the first interval where the water flow velocity in the route area is greater than a preset flow velocity.
[0010] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, the step of determining the silt height and distribution in the underwater operation area based on the standard topographic data and then determining the operation sequence includes: The central axis of waterway transportation is determined based on the route area, and the height of silt on both sides of the central axis is obtained based on the standard terrain data. The work sequence is determined based on preset dredging rules.
[0011] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, the preset dredging rules include: Based on the central axis, the further away from the central axis within the route area, the higher the priority for dredging; With the central axis as the center line, the side with lower siltation has a higher priority than the side with higher siltation.
[0012] As a preferred technical solution for underwater dredging operations utilizing secondary turbidity, the crushing device includes: a rotating shaft and a drive motor that is connected to the rotating shaft for transmission. The rotating shaft is fixedly equipped with blades for breaking hard soil and stiff brushes for lifting mud and sand.
[0013] Compared with existing technologies, the advantages of this invention lie in the fact that it preprocesses the acquired topographic and hydrological data to obtain standard topographic and hydrological data. Based on this standard hydrological data, the time interval for dredging operations is determined, and dredging is carried out when the water flow velocity in the navigation area exceeds a predetermined guaranteed velocity. This ensures that the water flow can effectively remove the secondary turbidity of the water, providing clear construction conditions and guaranteeing the dredging effect. Simultaneously, based on the standard topographic data, the silt height in the underwater operation area is obtained. Based on this silt height, a reasonable operation sequence is determined, prioritizing areas far from the central axis and with less silt accumulation. This avoids the silt in the secondary turbidity of the water from redepositing on the other side due to the Earth's rotation, thus preventing any negative impact on the dredging effect.
[0014] Furthermore, the present invention uses a crushing device to crush and turbidify the sludge and then uses a propulsion device to lift the turbid water a second time to the shallow water body, where it mixes with the shallow water body to form a secondary turbid water body. The secondary turbid water body is at a higher height and takes a longer time to settle, allowing sufficient time for it to be carried away by the water flow. The entire process does not require the use of surface vessels, thus avoiding the impact of surface dredging vessels on other vessels. Attached Figure Description
[0015] Figure 1 A flowchart of an underwater dredging operation method utilizing secondary turbidity provided by the present invention is shown. Detailed Implementation
[0016] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0017] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.
[0018] Figure 1 A flowchart of an underwater dredging operation method utilizing secondary turbidity provided by the present invention is shown.
[0019] like Figure 1 As shown, this invention discloses an underwater dredging method utilizing secondary turbidity treatment, comprising: Step S1: Obtain topographic and hydrological data of the underwater operation area, and preprocess the topographic and hydrological data to obtain standard topographic and standard hydrological data. Step S2: Determine the time interval for dredging operations based on the standard hydrological data, determine the silt height and silt distribution in the underwater operation area based on the standard topographic data, determine the operation sequence, and generate an operation plan. Step S3: In response to the start of the dredging operation, the crushing device crushes the silt in the work area to obtain turbid water. Step S4: Activate the propulsion suspension device to mix the primary turbid water with the shallow water to form secondary turbid water.
[0020] It should be noted that, in this embodiment of the invention, a multibeam echo sounder is used to scan the underwater area to obtain topographic data of the underwater operation area. Hydrological data is obtained through current meters, water level gauges, and tidal monitoring devices. The hydrological data includes, but is not limited to, water flow velocity, water level changes, tidal cycles, and other parameters that affect the effectiveness of underwater dredging operations. In this embodiment of the invention, the hydrological data includes: water flow velocity, water level changes, and tidal cycles.
[0021] Furthermore, preprocessing the terrain data to obtain standard terrain data includes: screening outlier data, filling in missing values, and smoothing. Preprocessing hydrological data to obtain standard hydrological data includes data calibration and alignment of time series.
[0022] It should be noted that outlier data refers to data points whose values deviate from the normal range due to measurement errors, equipment malfunctions, or other reasons. In data processing, methods for supplementing missing values mainly include linear interpolation or spatial interpolation. Smoothing often employs Gaussian filtering, median filtering, etc. In practice, the specific methods for supplementing missing values and smoothing are determined based on the actual situation. In practical use, hydrological data measuring devices such as current meters and water level gauges may develop measurement deviations after long-term use. Comparison with high-precision reference equipment is necessary; if deviations exist, the hydrological data needs to be corrected accordingly. Current meters, water level gauges, and other hydrological data measuring devices have different sampling frequencies; therefore, time series alignment is required for subsequent steps based on the hydrological data. Preprocessing the obtained hydrological data with topographic data and the preprocessing of hydrological data are existing technologies in data processing and will not be elaborated upon here.
[0023] Furthermore, determining the time interval for dredging operations based on the standard hydrological data includes: Based on the standard hydrological data, the time interval between the start of ebb tide and the start of high tide is determined and recorded as the first interval; Based on historical navigation information, the route area is determined, and the water velocity distribution within the route area changes over time. Based on the first interval and the water velocity distribution within the route area changes over time, the time interval for dredging operations is determined.
[0024] Furthermore, the time interval for dredging operations is determined based on the changes in water flow velocity distribution over time within the first interval and the route area. The time interval for dredging operations is selected from the first interval where the water flow velocity in the route area is greater than a preset flow velocity.
[0025] It should be noted that the preset flow velocity is determined based on the actual situation of the silt in the route area. In this embodiment of the invention, the preset flow velocity is 0.6 m / s.
[0026] In detail, dredging can only be carried downstream into the sea by the action of water flow between the beginning of low tide and the beginning of high tide (i.e., the first interval in this invention). However, within the first interval, the water velocity in the channel is positively correlated with the difference in water level between upstream and downstream. The greater the difference in water level, the greater the water velocity. Therefore, the water velocity in the first interval shows a trend of first increasing and then decreasing. The water velocity is low and cannot effectively remove the secondary turbid water, resulting in poor dredging effect. The determination of the preset flow velocity ensures that the water velocity in the channel can effectively remove the secondary turbid water and ensure the dredging effect.
[0027] Furthermore, determining the silt height and distribution in the underwater operation area based on the standard topographic data, and then determining the operation sequence, includes: The central axis of waterway transportation is determined based on the route area, and the height of silt on both sides of the central axis is obtained based on the standard terrain data. The work sequence is determined based on preset dredging rules.
[0028] Furthermore, the preset dredging rules include: Based on the central axis, the further away from the central axis within the route area, the higher the priority for dredging; With the central axis as the center line, the side with lower siltation has a higher priority than the side with higher siltation.
[0029] In detail, due to the influence of the Earth's rotation, the deposition of silt differs on both sides of the river's central axis. If the side with more silt is treated first, subsequent treatment of the side with less silt will cause some silt to deposit back onto the previously treated side due to the Earth's rotation, thus reducing the dredging effect. This invention, by prioritizing the treatment of the side with less silt, ensures that even if some silt deposits on the other side during the dredging process, it will be removed through subsequent secondary turbidity dredging operations. Based on the above principle, embodiments of this invention summarize preset dredging rules to better guarantee the dredging effect.
[0030] Furthermore, the crushing device includes: a rotating shaft and a drive motor that is hygienically connected to the rotating shaft; The rotating shaft is fixedly equipped with blades for breaking hard soil and stiff brushes for lifting mud and sand.
[0031] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0032] Alternatively, if the integrated units of this invention are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this invention, or the parts that contribute to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROM, RAM, magnetic disks, or optical disks.
Claims
1. A method for underwater dredging operations utilizing secondary turbidity treatment, characterized in that, include: Step S1: Obtain topographic and hydrological data of the underwater operation area, and preprocess the topographic and hydrological data to obtain standard topographic and standard hydrological data. Step S2: Determine the time interval for dredging operations based on the standard hydrological data, determine the silt height and silt distribution in the underwater operation area based on the standard topographic data, determine the operation sequence, and generate an operation plan. Step S3: In response to the start of the dredging operation, the crushing device crushes the silt in the work area to obtain turbid water. Step S4: Activate the propulsion suspension device to mix the primary turbid water with the shallow water to form secondary turbid water.
2. The underwater dredging method utilizing secondary turbidity treatment according to claim 1, characterized in that, Preprocessing terrain data to obtain standard terrain data includes: screening outlier data, filling in missing values, and smoothing. Preprocessing hydrological data to obtain standard hydrological data includes data calibration and alignment of time series.
3. The underwater dredging method utilizing secondary turbidity treatment according to claim 1, characterized in that, Determining the time interval for dredging operations based on the standard hydrological data includes: Based on the standard hydrological data, the time interval between the start of ebb tide and the start of high tide is determined and recorded as the first interval; Based on historical navigation information, the route area is determined, and the water velocity distribution within the route area changes over time. Based on the first interval and the water velocity distribution within the route area changes over time, the time interval for dredging operations is determined.
4. The underwater dredging method utilizing secondary turbidity treatment according to claim 3, characterized in that, The time interval for dredging operations is determined based on the changes in water flow velocity distribution over time within the first interval and the route area. The time interval for dredging operations is selected from the first interval where the water flow velocity in the route area is greater than the preset flow velocity.
5. The underwater dredging method utilizing secondary turbidity treatment according to claim 3, characterized in that, The process of determining the silt height and distribution in the underwater operation area based on the standard topographic data, and then determining the operation sequence, includes: The central axis of waterway transportation is determined based on the route area, and the height of silt on both sides of the central axis is obtained based on the standard terrain data. The work sequence is determined based on preset dredging rules.
6. The underwater dredging method utilizing secondary turbidity treatment according to claim 5, characterized in that, The preset dredging rules include: Based on the central axis, the further away from the central axis within the route area, the higher the priority for dredging; With the central axis as the center line, the side with lower siltation has a higher priority than the side with higher siltation.
7. The underwater dredging method utilizing secondary turbidity treatment according to claim 3, characterized in that, The crushing device includes: a rotating shaft and a drive motor that is connected to the rotating shaft for transmission. The rotating shaft is fixedly equipped with blades for breaking hard soil and stiff brushes for lifting mud and sand.