Test device for simulating self-weight deposition of dredged soil at different heights

Abstract

The utility model discloses a test device for simulating self-weight deposition of dredged soil with different heights, which comprises a mud containing pool and a stirring cylinder, the stirring cylinder is mounted on a soil table, the mud containing pool is arranged beside the soil table, a stirring device is arranged in the stirring cylinder, a plurality of grouting pipes are sequentially connected in parallel on one side of the mud containing pool from top to bottom, and the grouting pipes are connected in parallel with the mud containing pool. One side of the stirring cylinder is provided with a plurality of grouting pipes, the other side of the stirring cylinder is sequentially connected with a plurality of drainage pipes in parallel from top to bottom, the heights of the grouting pipes and the drainage pipes are matched with the corresponding slurry filling set height, the bottom of the stirring cylinder is connected with the plurality of grouting pipes through a main pipeline, the main pipeline is provided with a flowmeter and a main pipe valve, the grouting pipes are provided with grouting valves, and the main pipeline is provided with a plurality of grouting valves. And a drainage valve is arranged on the drainage pipe. The device can truly simulate discharge and self-weight deposition conditions of field dredged soil at different heights, and provides a reliable basis for summarizing a dredged mud deposition rule so as to guide field construction.

Description

Technical Field

[0001] The utility model belongs to the technical field of indoor model test of silt treatment in water conservancy projects, in particular to a test device for simulating the deadweight deposition of dredged soil at different heights. Background Art

[0002] With the increasing shortage of land resources for coastal water transport facilities, the construction, widening, and expansion of port and waterway projects has generated a large amount of dredged sediment. This sediment has a high initial moisture content and high salinity, and exhibits unfavorable properties such as high porosity, strong compressibility, poor grading, and poor fluidity. After the dredged soil is blown into the receiving area, it must undergo a long period of natural sedimentation before subsequent filling operations can be carried out. However, the natural sedimentation patterns of dredged silt are currently unclear, making it impossible to provide theoretical guidance for predicting silt accumulation and subsequent filling operations. Furthermore, most studies use indoor sedimentation column tests to summarize these patterns, which can only simulate the conditions at a single location and cannot fully simulate the overall conditions in the receiving area. Utility Model Content

[0003] The utility model provides a test device for simulating the self-weight deposition of dredged soil at different heights in order to solve the technical problems existing in the known technology. The device can truly simulate the discharge and deposition conditions of dredged soil on site, and provide a reliable basis for summarizing the deposition law of dredged mud.

[0004] The utility model adopts the following technical solutions to solve the technical problems existing in the known technology: a test device for simulating the self-weight deposition of dredged soil at different heights, comprising a mud receiving pool and a stirring cylinder, wherein the stirring cylinder is installed on a soil platform, the mud receiving pool is arranged next to the soil platform, a stirring device is provided in the stirring cylinder, a plurality of grouting pipes are sequentially connected in parallel from top to bottom on one side of the mud receiving pool, and a plurality of drainage pipes are sequentially connected in parallel from top to bottom on the other side, the heights of the grouting pipes and the drainage pipes match their corresponding mud filling set heights, the bottom of the stirring cylinder is connected to the plurality of grouting pipes through a main pipeline, a flow meter and a main valve are provided on the main pipeline, a grouting valve is provided on the grouting pipe, and a drainage valve is provided on the drainage pipe.

[0005] The height of the drainage pipe is 1 / 2 of the corresponding mud filling set height, and the height of the grouting pipe is 5 to 10 mm higher than the corresponding mud filling set height.

[0006] The stirring device includes a vertically arranged stirring rod, the lower end of which is connected to a stirring blade, and the upper end is connected to the output end of a DC motor. The DC motor is mounted on a horizontally arranged fixed steel plate, and the fixed steel plate is arranged on a bracket. The bottom of the bracket is fixedly connected to the upper opening of the stirring cylinder.

[0007] A ladder is provided on one side of the mixing tank.

[0008] The advantages and positive effects of the present invention are as follows: by adopting a mixing tank with a stirring device, the water and soil can be fully mixed to form a test mud that is close to the dredged mud discharged on site; by adopting a mud receiving pool, the overall situation of the mud receiving area can be well simulated, avoiding the deficiency that the indoor test of the sedimentation column can only simulate one point; by installing the mixing tank on the soil platform and the mud receiving pool next to the soil platform, a sufficient pressure difference can be generated between the mixing tank and the mud receiving pool, which facilitates the smooth filling of the mud into the mud receiving pool; by setting a flow meter on the main pipeline, a grouting valve on the grouting pipe, and a drain valve on the drain pipe, the process of dredged soil being discharged into the mud receiving area can be accurately simulated; by setting multiple groups of grouting pipes and drain pipes at different heights in the mud receiving pool, the self-weight deposition of dredged soil at different heights can be simulated. In summary, the present invention can realistically simulate the discharge and self-weight deposition of dredged soil at different heights, providing a reliable basis for summarizing the deposition law of dredged mud to guide on-site construction. In addition, the present invention has a simple structure, is easy to use, and is inexpensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present utility model.

[0010] In the figure: 1. DC motor; 2. Fixed steel plate; 3. Bracket; 4. Stirring rod; 5. Stirring blade; 6. Flow meter; 7. Main valve; 8. Main pipeline; 9. Soil platform; 10. Mud storage tank; 11. Grouting valve; 12. Drain valve; 13. Grouting pipe; 14. Drain pipe; 15. Ladder; 16. Mixing tank. DETAILED DESCRIPTION

[0011] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0012] See also Figure 1 A test device for simulating the self-weight deposition of dredged soil at different heights includes a mud pool 10 and a mixing cylinder 16. The mixing cylinder 16 is installed on the soil platform 9, and the mud pool 10 is arranged next to the soil platform 9 to generate sufficient pressure difference.

[0013] A stirring device is provided in the stirring tank 16 .

[0014] On one side of the mud receiving pool 10, a plurality of grouting pipes 13 are connected in parallel from top to bottom, and on the other side, a plurality of drainage pipes 14 are connected in parallel from top to bottom. To simulate the on-site conditions, the heights of the grouting pipes 13 and the drainage pipes 14 match their corresponding mud filling setting heights.

[0015] The bottom of the mixing tank 16 is connected to the plurality of grouting pipes 13 via a main pipeline 8 .

[0016] A flow meter 6 and a main pipe valve 7 are provided on the main pipeline 8 .

[0017] A grouting valve 11 is provided on the grouting pipe 13 .

[0018] A drain valve 12 is provided on the drain pipe 14 .

[0019] In this embodiment, the heights of the grouting pipe 13 and the drain pipe 14 are matched to their corresponding slurry filling set heights as follows: the height of the drain pipe 14 is 1 / 2 of its corresponding slurry filling set height, and the height of the grouting pipe 11 is 5 to 10 mm higher than its corresponding slurry filling set height. The stirring device includes a vertically arranged stirring rod 4, the lower end of which is connected to a stirring blade 5, the upper end of which is connected to the output end of a DC motor 1, and the DC motor 1 is mounted on a horizontally arranged fixed steel plate 2, which is mounted on a bracket 3. The bottom of the bracket 3 is fixedly connected to the upper opening of the stirring tank 16, resulting in a simple and compact structure. A ladder 15 is provided on one side of the stirring tank 16.

[0020] The above-mentioned device is used to conduct a dredged soil deposition and consolidation model test, which can truly simulate the on-site conditions. Through the test, test data with a small error from the on-site conditions can be obtained, providing a reliable basis for summarizing the deposition laws of dredged mud.

[0021] The use method of this utility model:

[0022] Step S1 , weighing the crushed dry soil with a mass of ms, climbing the ladder 15 and pouring the dry soil into the mixing tank 16 .

[0023] Step S2, prepare the required water according to the moisture content w1 of the dredged mud cleaned on site. The mass of the weighed water is mw=ms*w1 / 100. Climb the ladder 15 to pour the water into the mixing tank 16 in several times. When pouring water into the mixing tank for the first time, start the stirring device to stir the water-soil mixture to prevent the formation of large soil clods.

[0024] Step S3: After all the water is poured into the mixing tank 16, the mixing device is operated for another day and night to ensure that the water and soil are fully mixed to form a test mud that is close to the dredged mud discharged on site.

[0025] In step S4, the DC motor 1 and the stirring device are kept turned on to ensure that the soil particles and water are not separated.

[0026] Step S5: Select the mud filling height h according to the experimental design plan.

[0027] Step S6, according to the data investigation, the on-site mud storage pool is known to be long L1, wide L2, and the dredged mud flow rate is Q1, and the laboratory mud storage pool 10 is long L3, wide L4, and the mud flow rate in the main pipeline 8 is calculated as Q2 = Q1*L3*L4 / (L1*L2).

[0028] Step S7, opening the main valve 7, so that the main pipeline 8 and the grouting pipe 13 are connected.

[0029] Step S8, adjusting the opening of the corresponding grouting valve 11 and the drainage valve 12 according to the data displayed by the flow meter 6 until the data displayed by the flow meter 6 is consistent with the calculated flow rate Q2.

[0030] Step S9: After the mud receiving pool 10 is filled to a set height according to the set mud flow rate, the grouting valve 11 is closed, and the drainage valve 12 remains open.

[0031] Step S10, turning off the stirring device.

[0032] Step S9, after waiting for the set time, take the solution discharged from the drain pipe, the mass of water in the test solution is M1, the mass of soil is M2, the water content of the solution is w2=M1 / M2*100%, and the water content of the solution is compared with the on-site situation to confirm that the test data is accurate.

[0033] Step S10: After a set time interval, observe and determine the soil in different areas of the mud receiving pool 10, and summarize the data to summarize the dredged mud deposition rules.

[0034] After the slurry is filled into the slurry receiving tank 10, it continuously deposits. At intervals, the soil mass in different areas of the slurry receiving tank 10 is observed and determined, and the data can be summarized to summarize the dredged slurry deposition patterns. Furthermore, the device is equipped with multiple sets of grouting pipes 13 and drainage pipes 14 corresponding to different heights of the slurry receiving tank 10. According to the test plan, the slurry receiving tank 10 can be filled with slurry at different heights to simulate the self-weight deposition of dredged soil at different heights.

[0035] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A test device for simulating the self-weight deposition of dredged soil at different heights, characterized in that: It includes a mud receiving pool and a mixing tank. The mixing tank is installed on the soil platform, and the mud receiving pool is set beside the soil platform. A stirring device is provided in the stirring tank. On one side of the mud receiving pool, multiple grouting pipes are sequentially connected in parallel from top to bottom, and on the other side, multiple drainage pipes are sequentially connected in parallel from top to bottom. The heights of the grouting pipes and the drainage pipes match their corresponding mud filling setting heights. The bottom of the mixing tank is connected to the plurality of grouting pipes through a main pipeline. A flow meter and a main valve are provided on the main pipeline. A grouting valve is provided on the grouting pipe. A drainage valve is provided on the drainage pipe.

2. The test device for simulating the self-weight deposition of dredged soil at different heights according to claim 1, characterized in that: The height of the drainage pipe is 1 / 2 of the corresponding mud filling set height, and the height of the grouting pipe is 5 to 10 mm higher than the corresponding mud filling set height.

3. The test device for simulating the self-weight deposition of dredged soil at different heights according to claim 1, characterized in that: The stirring device includes a vertically arranged stirring rod, the lower end of which is connected to a stirring blade, and the upper end is connected to the output end of a DC motor. The DC motor is mounted on a horizontally arranged fixed steel plate, and the fixed steel plate is arranged on a bracket. The bottom of the bracket is fixedly connected to the upper opening of the stirring cylinder.

4. The test device for simulating the self-weight deposition of dredged soil at different heights according to claim 1, characterized in that: A ladder is provided on one side of the mixing tank.

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