River channel sediment processing method

Abstract

The present application belongs to the technical field of river management, and particularly relates to a river sediment soil-class and grade processing method, comprising the following steps: S1, water depth detection: detecting the water depth of a river on a dredging ship with a water depth measuring instrument, and drawing a river cross-section diagram on a display screen; S2, sampling: inserting a metal sampling cylinder into the river, and the sediment inside the metal sampling cylinder is a sample, which is divided into a type soil and b type soil after detection; S3, post-processing: excavating the sediment and sending it to a sediment processing plant, wherein the lower 25% of the sediment of the a type soil is repaired and maintained; S4, backfilling: backfilling the repaired and maintained sediment, and adding a composite chemical agent to the remaining sediment of the b type soil; and S5, planting: planting a restorative aquatic plant on the riverbed sediment. The present application can process the sediment by soil class and grade, and timely check the processing results by soil class, which is beneficial to the planting of aquatic plants on the river sediment to increase the growth of the aquatic plants, and ensures the continuous and effective treatment of the river sediment.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of river management, and particularly relates to a river sediment soil type and grade processing method. BACKGROUND

[0002] River management is an important environmental protection project and people's livelihood project, which is of great significance for protecting the environment, improving flood control capacity, improving water quality and ecological environment, and beautifying the environment. Especially in the areas not covered by sewage treatment plants, a lot of domestic sewage is discharged into the river, which causes river eutrophication pollution over a long period of time, reduces the plants and animals in the river, and destroys the internal ecological balance, which needs to be artificially managed regularly.

[0003] River sediment is the main concentration area of pollutants, which is easy to harm aquatic plants after being polluted, and it is difficult to rely on river ecology to repair itself or needs a very long time. Artificially cleaning river sediment often drives a dredging ship on the river surface, sucks the sludge through dredging equipment, or digs out the sludge through a twisting and digging type device, sends it to a treatment plant for purification, and then sends it back to the river bottom, and then plants aquatic plants on the sludge.

[0004] When the existing river sediment is processed, the sediment is taken out for purification and then aquatic plants are planted. However, the pollution degree of the sediment in different areas is different, and the conditions suitable for the growth of aquatic plants are also different. The root system of the aquatic plants just planted is shallow and not convenient for grade processing. The aquatic plants in some areas with heavy pollution are easily knocked off by the river rapids, which reduces the planting of aquatic plants in the river sediment. Therefore, we propose a river sediment soil type and grade processing method. SUMMARY

[0005] The purpose of the present application is to provide a river sediment soil type and grade processing method, which can process the sediment by soil type and grade, and check the processing results by soil type in time, which is beneficial to the growth of aquatic plants in the river sediment and ensures the continuous and effective processing of the river sediment.

[0006] The technical solutions adopted by the present application are as follows:

[0007] A river sediment soil type and grade processing method, comprising the following steps:

[0008] S1, water depth detection: a water depth measuring instrument is carried on the dredging ship, the water depth measuring instrument can be a single-beam depth sounder of HY1600 type, the probe is inserted into the river water and travels with the ship, the single-beam is used to detect the river water depth, and the river cross section is drawn on the display screen to mark the river sediment depth h;

[0009] S2, sampling: after stopping the ship, the metal sampling cylinder is vertically inserted into the river sediment, the sediment inside the metal sampling cylinder is the sample, the upper opening of the sampling cylinder is sucked by negative pressure, then the metal sampling cylinder is taken out to avoid the sample from sliding out of the metal sampling cylinder, and then the sample is evenly divided into four parts for detection according to the increasing order of sampling depth;

[0010] The LD-X800 handheld soil heavy metal detector purchased from the market can be selected for detection, and whether the sample belongs to the I-class standard limit value is judged according to the detection report. The sample exceeding the I-class standard limit value is recorded as a type of soil, and the sample not exceeding the I-class standard limit value is recorded as b type of soil. The sampling points are selected at intervals of 200 m for subsequent sampling. If a type of soil is continuously detected for more than 3 times, the sampling points are selected at intervals of 100 m for subsequent sampling. Until b type of soil is continuously detected for more than 5 times, the sampling points are selected at intervals of 200 m for subsequent sampling. The sampling and detection workload can be adjusted in time, the distribution boundary of heavy pollution a type of soil can be refined, and the accuracy of river sediment soil classification treatment can be improved;

[0011] S3, post-processing: all the sediments in the a type of soil belonging to the river basin are excavated, 75% of the sediments in the b type of soil belonging to the river basin are excavated, and are sent to a sediment treatment plant. The lower 25% of the a type of soil belongs to the sediment and is repaired and maintained. Referring to the Chinese invention with publication number CN116575486A, a river dredging method, the sediment repair and maintenance can select to add aluminum sulfate, manganese dioxide, activated carbon, diatomite and an optimization agent. Lactic acid bacteria, bacillus subtilis, bacillus megaterium, yeast and photosynthetic bacteria can also be selected as optimization agents.

[0012] The repaired and maintained sediment is detected after 7 days to see if it is qualified. The unqualified sediment is repaired and maintained again.

[0013] S4, backfilling: the repaired and maintained sediment in step S3 is backfilled into the corresponding river basin, and the remaining sediment in the b type of soil belonging to the river basin is added with a composite chemical agent composed of aluminum sulfate, manganese dioxide, activated carbon, diatomite and an optimization agent and mixed by a vibrator to uniformly maintain the remaining sediment in the b type of soil belonging to the river basin until the maintenance is qualified.

[0014] Among them, aluminum sulfate, manganese dioxide, activated carbon, diatomite and optimization agent are mixed uniformly in a mass ratio of 1:1:2:5:1, so that the main components of the agent are wrapped by diatomite, and the other components of the agent are adhered by diatomite and form a water barrier layer to avoid being washed away by river water.

[0015] S5, planting: after the step S4 backfilling the bottom mud and the river water is stable and adaptive planting, planting the restorative aquatic plants on the riverbed mud, and pouring the cement dam at equal intervals, the cement dam can shield the roots of the nearby restorative aquatic plants, relieve the impact of the river torrent on the aquatic plants on the bottom mud, at the same time, a plurality of spiral flat tubes filled with optimization agents are embedded in the cement dam, the openings of the flat tubes extend into the corresponding interior of the cement dam, contact the river water and release the optimization agents, the beneficial bacteria in the optimization agents optimize the water quality, continuously create the environment required for the growth of aquatic plants, not less than 30d, which is beneficial to the planting of aquatic plants on the riverbed mud and the growth of the aquatic plants, and promotes the ecological restoration of the riverbed mud;

[0016] The cement dam is arranged along the cross section of the river channel, the height is not more than 20cm, the width is not more than 15cm, the interior can be constructed with a reinforcing cage to improve the supporting strength, and the subsequent operation of pumping silt will not be obviously hindered;

[0017] S6, sampling inspection: after the aquatic plants are planted for at least 30d in the step S5, at least 5 sampling points are selected in the a-type soil watershed, and at least 3 sampling points are selected in the b-type soil watershed, the area of each sampling point is 1m 2 The treated river channel is divided into soil types, the aquatic plant leaves or branches are collected as samples, and the roots are kept, the samples are successfully obtained from all sampling points, and then the riverbed mud treatment is qualified, if the samples are not collected from the sampling points, the above steps are repeated until the riverbed mud treatment is qualified, and the continuous and effective treatment of the riverbed mud is ensured.

[0018] The technical effects obtained by the application are as follows:

[0019] The riverbed mud processing method of the application can process the mud by soil type and grade, check the processing results in time, pour the cement dam at the specified mud, shield the roots of the nearby restorative aquatic plants by the cement dam, relieve the impact of the river torrent on the aquatic plants on the bottom mud, release the optimization agents from the spiral flat tubes in the cement dam, optimize the water quality by the beneficial bacteria in the optimization agents, continuously create the environment required for the growth of aquatic plants, which is beneficial to the planting of aquatic plants on the riverbed mud and the growth of the aquatic plants, promotes the ecological restoration of the riverbed mud, and ensures the continuous and effective treatment of the riverbed mud.

[0020] The riverbed mud processing method of the application can process the mud by soil type and grade, check the processing results in time, pour the cement dam at the specified mud, shield the roots of the nearby restorative aquatic plants by the cement dam, relieve the impact of the river torrent on the aquatic plants on the bottom mud, release the optimization agents from the spiral flat tubes in the cement dam, optimize the water quality by the beneficial bacteria in the optimization agents, continuously create the environment required for the growth of aquatic plants, which is beneficial to the planting of aquatic plants on the riverbed mud and the growth of the aquatic plants, promotes the ecological restoration of the riverbed mud, and ensures the continuous and effective treatment of the riverbed mud.

[0021] The river channel sediment soil type grading treatment method of the application can timely adjust the sampling and detection workload, and can also refine the distribution boundary of the heavily polluted a type soil, and improve the accuracy of the river channel sediment soil type treatment.

[0022] The river channel sediment soil type grading treatment method of the application, aluminum sulfate, manganese dioxide, activated carbon, diatomite and an optimizing agent are uniformly mixed in a mass ratio of 1:1:2:5:1, so that the main components of the medicament are wrapped by diatomite, the other components of the medicament are adhered by diatomite, and a water-resisting layer is formed to avoid being washed away by river water. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a logic block diagram of the treatment method of the application;

[0024] Figure 2 is a flowchart of the treatment method of the application;

[0025] Figure 3 is a river channel cross-sectional view of the application;

[0026] Figure 4 is a sampling schematic view of step S2 of the application;

[0027] Figure 5 is a sediment backfilling view of step S4 of the application;

[0028] Figure 6 is a planting of a repairable aquatic plant schematic view of step S5 of the application. DETAILED DESCRIPTION

[0029] In order to make the purpose and advantages of the application more clear and explicit, the application is specifically described below in combination with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the application, and does not strictly limit the specific protection scope requested by the application.

[0030] As shown in Figures 1-6 , a river channel sediment soil type grading treatment method comprises the following steps:

[0031] S1, water depth detection: a water depth measuring instrument is carried on a dredging ship, the water depth measuring instrument can be a single-beam depth sounder of HY1600 type, a probe head is inserted into river water and travels with the ship, the river water depth is detected by the single-beam, and a river channel cross-sectional view as shown in Figure 3 is drawn on a display screen, and the river channel sediment depth h is calibrated;

[0032] S2, sampling: after stopping the ship, a metal sampling cylinder is vertically inserted into the river sediment, the sediment inside the metal sampling cylinder is the sample, the upper opening of the sampling cylinder is sucked by negative pressure, then the metal sampling cylinder is taken out to avoid the sample from sliding out of the metal sampling cylinder, and then the sample is evenly divided into four parts in order of increasing sampling depth for detection;

[0033] When detecting, LD-X800 handheld soil heavy metal detector purchased from the market can be selected, and whether the sample belongs to the I-class standard limit value is judged according to the detection report. The sample exceeding the I-class standard limit value is recorded as a type of soil, and the sample not exceeding the I-class standard limit value is recorded as b type of soil. The sampling points are selected at intervals of 200 m for subsequent sampling. If a type of soil is continuously detected for more than 3 times, the sampling points are selected at intervals of 100 m for subsequent sampling. Until b type of soil is continuously detected for more than 5 times, the sampling points are selected at intervals of 200 m for subsequent sampling. The sampling and detection workload can be adjusted in time, the distribution boundary of heavy pollution a type of soil can be refined, and the accuracy of river sediment soil classification treatment is improved;

[0034] S3, post-processing: all the sediments in the a type of soil belonging to the river basin are excavated, 75% of the sediments in the b type of soil belonging to the river basin are excavated, and are sent to a sediment treatment plant. The lower 25% of the a type of soil belongs to the sediment, which is repaired and maintained. Referring to the Chinese invention of a river dredging method with publication number CN116575486A, the sediment repair and maintenance can select to add aluminum sulfate, manganese dioxide, activated carbon, diatomite and an optimizing agent. Lactic acid bacteria, bacillus subtilis, bacillus megaterium, yeast and photosynthetic bacteria can also be selected as the optimizing agent;

[0035] The repaired and maintained sediment is detected after 7 days to see whether it is qualified. The unqualified sediment is repaired and maintained again;

[0036] S4, backfilling: the repaired and maintained sediment in step S3 is backfilled into the corresponding river basin, as shown below Figure 5 , and the remaining sediment in the b type of soil belonging to the river basin is added with a composite chemical agent composed of aluminum sulfate, manganese dioxide, activated carbon, diatomite and an optimizing agent and mixed by a vibrator to uniformly maintain the remaining sediment in the b type of soil belonging to the river basin, so as to realize the soil classification and grading treatment of sediments with different pollution degrees until the maintenance is qualified;

[0037] Among them, aluminum sulfate, manganese dioxide, activated carbon, diatomite and the optimizing agent are mixed uniformly at a mass ratio of 1:1:2:5:1, so that the main components of the agent are wrapped by diatomite, and diatomite is used to stick other components of the agent and form a water barrier layer to avoid being washed away by river water;

[0038] S5, planting: after the riverbed mud is planted with the restorative aquatic plants and the cement dam is poured at equal intervals, the cement dam can shield the roots of the restorative aquatic plants nearby, relieve the impact of the river rapids on the aquatic plants on the riverbed mud, and at the same time, the plurality of spiral flat tubes filled with the optimization agent are embedded in the cement dam, the openings of the flat tubes extend into the cement dam, release the optimization agent after contacting the river water, and make the beneficial bacteria in the optimization agent optimize the water quality, continuously create the environment required for the growth of the aquatic plants, and the process lasts for no less than 30 days, which is beneficial to the growth of the aquatic plants on the riverbed mud and the ecological restoration of the riverbed mud;

[0039] The cement dam is arranged along the riverbed cross section, has a height of no more than 20 cm and a width of no more than 15 cm, and the internal steel reinforcement cage can improve the support strength without significantly hindering the subsequent operation of pumping the silt;

[0040] S6, sampling inspection: after the aquatic plants are planted for at least 30 days in step S5, the a-type soil original river basin has relatively serious mud pollution, at least 5 sampling points are selected in the river basin of the a-type soil, and the sampling surface is wider; the b-type soil original river basin has not serious mud pollution, at least 3 sampling points are selected in the river basin of the b-type soil, and the mud treatment result is sampled and inspected as appropriate, and the area of each sampling point is 1 m 2 The treated riverbed is divided into soil types, and the leaves or branches of the aquatic plants are collected as samples and the roots are reserved. If the samples are successfully obtained at all sampling points, the river basin mud treatment is qualified. If the samples are not collected at the sampling points, the above steps are repeated until the river basin mud treatment is qualified, so as to ensure the continuous and effective treatment of the riverbed mud.

[0041] The above only describes the preferred embodiments of the present application. It should be noted that for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. A method for treating riverbed mud by soil classification and grading, characterized by: The method comprises the following steps: S1, water depth detection: a water depth detector is carried on a dredging ship, a probe is inserted into the water of the river to detect the water depth of the river, and a cross-sectional view of the river is drawn on a display screen; S2, sampling: after the ship is stopped, a metal sampling cylinder is vertically inserted into the river sediment, the sediment inside the metal sampling cylinder is the sample, then the sample is evenly divided into four parts in order of increasing sampling depth for detection, and after detection, the sample is divided into a type soil and b type soil; samples exceeding the I-class standard limit are recorded as a type soil, and samples not exceeding the I-class standard limit are recorded as b type soil; S3, post-processing: all sediments in the watershed of a type soil are excavated, 75% of the upper sediments in the watershed of b type soil are excavated, and are sent to a sediment treatment plant, wherein 25% of the lower sediments in the watershed of a type soil are repaired and maintained, the repair and maintenance comprises adding a composite chemical agent and an optimizing agent, and the optimizing agent comprises lactic acid bacteria, bacillus subtilis, bacillus megaterium, yeast and photosynthetic bacteria; S4, backfilling: the sediments repaired and maintained in step S3 are backfilled into the corresponding watershed of the river, and the remaining sediments in the watershed of b type soil are mixed with the composite chemical agent until the maintenance is qualified; S5, planting: after the backfilled sediments and river water in step S4 are stably adapted and planted, restorative aquatic plants are planted on the riverbed sediments, cement dams are equally poured, and a plurality of flat tubes containing the optimizing agent are buried in the cement dams; S6, sampling inspection: after the aquatic plants in step S5 are planted for at least 30 days, at least 5 sampling points are selected in the watershed of a type soil, and at least 3 sampling points are selected in the watershed of b type soil, the leaves or branches of the aquatic plants are collected as samples and the roots are reserved, if no sample is collected at a sampling point, the sediments in the watershed are repeatedly subjected to the above steps.

2. The method according to claim 1, wherein the method is characterized by: In step S2, the metal sampling cylinder is taken out after the opening of the negative pressure suction sampling cylinder.

3. The method according to claim 1, wherein the method is characterized by: In step S2, the sampling points are selected at intervals of 200m for subsequent sampling, if a type soil is continuously detected for more than 3 times, the sampling points are selected at intervals of 100m for subsequent sampling, and if b type soil is continuously detected for more than 5 times, the sampling points are selected at intervals of 200m for subsequent sampling.

4. The method according to claim 1, wherein the method is characterized by: In step S3, the repaired and maintained sediments are detected after 7 days, and the unqualified sediments are repaired and maintained again.

5. The method according to claim 1, wherein the method is characterized by: In step S4, the composite chemical agent is composed of aluminum sulfate, manganese dioxide, activated carbon, diatomite and the optimizing agent in a mass ratio of 1:1:2:5:

1.

6. The method according to claim 1, wherein the method is characterized by: In step S5, the flat tubes are in a spiral structure, and the openings of the flat tubes extend into the corresponding cement dams.

7. The method according to claim 1, wherein the method is characterized by: In step S5, the cement dams are arranged along the cross section of the river, the height is not more than 20cm, and the width is not more than 15cm.

8. The method according to claim 1, wherein the method is characterized by: In step S5, a steel cage is constructed in the cement dam.

Images