Corrosion environment simulation device for steel sheet pile

Abstract

The utility model discloses a corrosion environment simulation device for a steel sheet pile. The simulation device comprises an outer sleeve, an inner sleeve, a blowing assembly and a liquid storage tank, the inner sleeve is located in the outer sleeve and communicated with the outer sleeve, and the inner sleeve is filled with soil; the air blowing assembly is located above the inner sleeve and used for blowing air into the inner sleeve. The liquid storage tank is connected with the outer sleeve through a first backflow pipe, a filtering assembly is arranged on the first backflow pipe, and a water pumping pipe is further connected between the liquid storage tank and the outer sleeve. The steel sheet pile is inserted into the soil in the inner sleeve, liquid in the liquid storage tank is pumped into the outer sleeve through the water pumping pipe, the liquid flows into the soil in the inner sleeve to soak the soil, and after a period of time, the liquid in the outer sleeve flows back into the liquid storage tank through the first backflow pipe to dry the soil; the corrosion environment of the steel sheet pile can be simulated through continuous wetting and drying alternation, so that corrosion condition data of the steel sheet pile in the corrosion environment are obtained, and the service life of the steel sheet pile is accurately judged.

Description

Technical Field

[0001] This utility model relates to the field of steel sheet pile corrosion technology, and in particular to a steel sheet pile corrosion environment simulation device. Background Technology

[0002] Steel sheet piles are a type of steel structure with interlocking joints. Their cross-sections include straight plates, channel shapes, and Z-shapes, and they come in various sizes and interlocking methods. Common types include the Larsen type and the Lakwana type. Their advantages include: high strength, easy penetration into hard soil layers; ability to be constructed in deep water, and the ability to be reinforced with diagonal supports to form a cofferdam when necessary; good waterproofing performance; and the ability to be assembled into cofferdams of various shapes and reused multiple times. Therefore, they have a wide range of applications.

[0003] Sheet piles are widely used in some marine engineering projects. However, the marine environment is complex, and sheet piles are affected by various environmental factors. After being inserted into the soil in seawater, the soil is submerged and moistened during high tide, and then dried by sea breezes and the sun after the tide recedes. With the continuous ebb and flow of the tide, the soil with the sheet piles is constantly subjected to alternating wet and dry conditions, which leads to corrosion of the sheet piles. As the sheet piles continue to corrode, their service life is affected. Currently, there is no simulation of the alternating wet and dry environment of sheet piles in the marine environment, so data on the corrosion of sheet piles cannot be obtained. Therefore, it is impossible to accurately determine the service life of sheet piles and cannot provide data support for corrosion research and the reuse of sheet piles after corrosion. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a steel sheet pile corrosion environment simulation device.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A device for simulating corrosion environment of sheet piles, including an outer sleeve;

[0007] An inner sleeve is fixedly installed inside an outer sleeve and is connected to the outer sleeve. The inner sleeve is filled with soil, and steel sheet piles are inserted into the soil.

[0008] A blower assembly is disposed above the inner sleeve and is used to blow air into the inner sleeve;

[0009] The liquid storage tank is connected to the outer sleeve via a first return pipe. The first return pipe is equipped with a filter assembly. A water pumping pipe is also connected between the liquid storage tank and the outer sleeve to draw liquid from the liquid storage tank into the outer sleeve.

[0010] Preferably, a sieve plate is fixedly installed inside the inner sleeve for supporting soil, and multiple through holes are opened on the side wall of the inner sleeve, with the through holes located below the sieve plate.

[0011] Preferably, the blower assembly includes a blower cap, which is disposed above the inner sleeve, with a gap between the blower cap and the inner sleeve, and an air inlet pipe connected to the blower cap for blowing air into the inner sleeve.

[0012] Preferably, an annular water supply pipe is fixedly provided on the inner wall of the outer sleeve, the annular water supply pipe is connected to the water pumping pipe, and a nozzle is provided on the annular water supply pipe for spraying water onto one side of the inner sleeve.

[0013] Preferably, the filter assembly includes a filter cup, a lid is fixedly provided on the top of the filter cup, a filter screen is provided inside the filter cup, and filter paper is laid on the inner wall of the filter screen.

[0014] Preferably, a plurality of pull cords are evenly arranged on the cup lid along the circumference, and a baffle is fixedly connected to one end of each pull cord, with the baffle located at the center of the cup lid.

[0015] Preferably, the inner sleeve is provided with a plurality of heating rods, which are inserted into the soil.

[0016] Preferably, a second reflux pipe is connected between the outer sleeve and the liquid storage tank, and a valve is provided on the second reflux pipe.

[0017] Preferably, a cooling assembly is provided on the water pumping pipe. The cooling assembly includes a cooling box, which is connected to the water pumping pipe. A cooling pipe is provided inside the cooling box, and cooling water flows in the cooling pipe to cool the water flow inside the cooling box.

[0018] A method for simulating the corrosion environment of steel sheet piles includes the following steps:

[0019] S1. The liquid in the storage tank is drawn out through the pumping pipe and transported to the outer sleeve until the inner sleeve is filled to 2 / 3 of its volume. The liquid can wet the soil through the through hole of the inner sleeve and the sieve plate.

[0020] S2. After soaking for a certain period of time, open the valve on the second return pipe and stop the water pumping pipe from the storage tank to the outer sleeve, so that the liquid in the outer sleeve flows back to the storage tank.

[0021] S3. Blow air into the inner sleeve through the air inlet pipe to dry the soil inside the inner sleeve;

[0022] S4. Repeat the above steps.

[0023] The beneficial effects of adopting the above technical solution are as follows:

[0024] 1. In this utility model, steel sheet piles are inserted into the soil in the inner sleeve to simulate the insertion of steel sheet piles into the soil of the ocean. Liquid stored in the storage tank simulates seawater. The liquid in the storage tank is pumped into the outer sleeve through the pumping pipe. The liquid can enter the inner sleeve through the through hole on the outer sleeve to completely wet the soil, thereby simulating the high tide. When simulating the low tide, the water in the outer sleeve is returned to the storage tank through the first return pipe. The blowing component blows air into the inner sleeve to dry the soil. By continuously repeating the above operation, the steel sheet piles can be simulated in a wet and dry environment to obtain data on the corrosion of the steel sheet piles in marine engineering.

[0025] 2. In this utility model, a heating rod is inserted into the soil, which can heat the soil and the liquid in the inner sleeve, thus simulating the environment of the steel sheet pile in summer; while the cooling component can cool the liquid, thus simulating the environment of the steel sheet pile in winter. By simulating the temperature of the environment where the steel sheet pile is located, more accurate data on the corrosion of the steel sheet pile can be obtained.

[0026] 3. In this utility model, the filter assembly can filter the liquid that flows back to the storage tank, preventing excessive sediment from flowing back into the storage tank and causing sediment accumulation, which would result in sludge formation in the storage tank. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a three-dimensional schematic diagram of the windproof cap of this utility model;

[0029] Figure 3 This is a schematic diagram of the filter assembly structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the cooling component structure of this utility model.

[0031] In the diagram: 1 is the outer sleeve, 2 is the inner sleeve, 3 is the liquid storage tank, 4 is the first return pipe, 5 is the water suction pipe, 6 is the sieve plate, 7 is the through hole, 8 is the wind cap, 9 is the air inlet pipe, 10 is the annular water supply pipe, 11 is the nozzle, 12 is the filter cup, 13 is the cup cover, 14 is the filter screen, 15 is the pull rope, 16 is the baffle, 17 is the heating rod, 18 is the cooling box, 19 is the cooling pipe, 20 is the second return pipe, 21 is the valve, 22 is the cover plate, 23 is the locking ring, 24 is the sealing ring, 25 is the annular retaining plate, 26 is the support ring, 27 is the limiting ring, 28 is the collection chamber, 29 is the blowing assembly, 30 is the filter assembly, 31 is the cooling assembly, and 32 is the support rod. Detailed Implementation

[0032] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] like Figure 1As shown, a steel sheet pile corrosion environment simulation device includes an outer sleeve 1, which is a cylindrical structure with an open top. An inner sleeve 2, also a cylindrical structure with an open top, is fixedly installed inside the outer sleeve 1. The diameter of the inner sleeve 2 is smaller than that of the outer sleeve 1. The lower end of the inner sleeve 2 is fixedly installed on the bottom surface of the outer sleeve 1. The inner sleeve 2 and the outer sleeve 1 are coaxially arranged and connected, allowing liquid to enter the inner sleeve 2 from the outer sleeve 1. The inner sleeve 2 is filled with soil, the composition of which is similar to that of marine soil. The soil composition is the same, but the ratio can be adjusted according to different regions. Steel sheet piles are inserted into the soil. A blowing assembly 29 is installed above the inner sleeve 2 to blow air into the inner sleeve 2, simulating the dry state of the soil during low tide. A liquid storage tank 3 is also provided. The liquid storage tank 3 can be located on one side of the outer sleeve 1 or below the outer sleeve 1. In this embodiment, the liquid storage tank 3 is located below the outer sleeve 1. The liquid storage tank 3 and the outer sleeve 1 are connected by a first return pipe 4. One end of the first return pipe 4 is connected to the bottom of the outer sleeve 1, and the other end is connected to the liquid storage tank 1. The top of the outer sleeve 1 is connected to the top of the storage tank 3, allowing the liquid inside the outer sleeve 1 to flow back to the storage tank 3 through the first return pipe 4. A water pump 5 is also connected between the storage tank 3 and the outer sleeve 1. One end of the water pump 5 is connected to the lower part of the storage tank 3, and the other end is connected to the upper part of the outer sleeve 1. A water pump is installed on the water pump 5 to draw the liquid from the storage tank 3 into the outer sleeve 1. The liquid in the storage tank 3 is drawn into the outer sleeve 1 through the water pump 5, and the liquid in the outer sleeve 1 can enter the inner sleeve 2, wetting the soil in the inner sleeve 2. After soaking for a period of time, the liquid in the outer sleeve 1 is returned to the storage tank 3 through the first return pipe 4, and the liquid in the outer sleeve 1 is drained. At the same time, the blowing component 29 blows air into the soil in the inner sleeve 2 to dry the soil, which can simulate the scene of the sea breeze blowing away the moisture in the soil. The above operation is continuously repeated to make the soil where the steel sheet pile is buried constantly dry and wet, which can simulate the corrosion state of the steel sheet pile under the alternating dry and wet state. By observing the corrosion of the steel sheet pile, accurate data can be obtained, so as to accurately predict the service life of the steel sheet pile.

[0036] It should be noted that the outer sleeve 1, inner sleeve 2 and sieve plate 6 are all made of corrosion-resistant materials, such as engineering plastics or stainless steel. Scales are provided on the walls of the outer sleeve 1 and inner sleeve 2 to facilitate observation of the liquid level. The outer sleeve 1 is fixed to the ground by a bracket, and holes are provided in the ground below the outer sleeve 1 for placing the liquid storage tank.

[0037] Furthermore, a sieve plate 6 is fixedly installed inside the inner sleeve 2. The sieve plate 6 is horizontally installed inside the inner sleeve 2, and a certain gap is left between the sieve plate 6 and the bottom plate of the inner sleeve 2 for the passage of liquid. The sieve plate 6 is used to support soil. The soil inside the inner sleeve 2 is piled on the sieve plate 6. The sieve plate 6 has multiple sieve holes. Since the sieve hole diameter is small, the sieve hole can be used for the passage of liquid while preventing soil from falling from the sieve hole to the bottom of the sieve plate 6. Multiple through holes 7 are opened on the side wall of the inner sleeve 2. The through holes 7 are located below the sieve plate 6. In this embodiment, the liquid drawn from the storage tank 3 through the pumping pipe 5 enters the outer sleeve 1 and then enters the inner sleeve 2 through the through hole 7. It then enters the soil above the sieve plate 6 through the sieve holes on the sieve plate 6, thus wetting the soil in the inner sleeve 2 and simulating the state during high tide. When simulating low tide, the water pump on the pumping pipe 5 stops pumping water, and the liquid in the outer sleeve 1 flows back to the storage tank 3 through the first return pipe 4, emptying the liquid in the outer sleeve 1. At the same time, the water in the inner sleeve 2 can also flow back to the outer sleeve 1 through the sieve holes on the sieve plate 6 and the through hole 7, finally emptying the liquid and simulating the dry state of the soil during low tide.

[0038] In one embodiment, the sieve plate 6 is welded and fixed to the inner wall of the inner sleeve 2, so that the sieve plate 6 and the inner sleeve 2 are fixedly connected.

[0039] In another embodiment, an annular groove is provided on the inner wall of the inner sleeve 2, and the edge of the sieve plate 6 is engaged in the annular groove, thereby fixing the sieve plate 6 and the inner sleeve 2 together.

[0040] Furthermore, such as Figure 2 As shown, the blower assembly 29 includes a blower cap 8, which is a cylindrical structure with an open bottom. The blower cap 8 covers the inner sleeve 2. The diameter of the blower cap 8 is larger than the diameter of the inner sleeve 2, so there is a gap between the blower cap 8 and the inner sleeve 2. The upper end of the blower cap 8 is connected to an air inlet pipe 9 for blowing air into the inner sleeve 2. When the tide is low, the soil is exposed above the water surface. The sea breeze blows across the soil, but it can only dry the top layer of sand. The bottom layer of sand remains moist. Steel sheet piles corrode more severely in this semi-dry state. This embodiment simulates this state. The air inlet pipe 9 blows air into the air cap 8 and moves it downwards to the soil, allowing the air to come into contact with the soil in the inner sleeve 2. Since the air cannot escape through the soil, and there is a gap between the air cap 8 and the inner sleeve 2, the air escapes through the gap between the air cap 8 and the inner sleeve 2. Therefore, the upper layer of soil in the inner sleeve 2 is dried, while the lower layer remains moist.

[0041] Furthermore, multiple support rods 32 are fixedly installed at the bottom of the wind cap 8. The multiple support rods 32 are evenly arranged along the circumference. The lower end of the support rod 32 is provided with a slot. When the wind cap 8 is placed on the inner sleeve 2, the lower end of the support rod 32 abuts against the upper end of the inner sleeve 2, and the upper end of the inner sleeve 2 is locked in the slot of the support rod 32, so that a certain gap is left between the inner sleeve 2 and the wind cap 8. When air is blown into the inner sleeve 2, the air entering the inner sleeve 2 can be discharged from the gap between the inner sleeve 2 and the wind cap 8.

[0042] It should be noted that the air intake duct 9 includes a main air intake pipe and multiple branch air intake pipes. The multiple branch air intake pipes are all connected to the main air intake pipe. The multiple branch air intake pipes are evenly arranged at the upper end of the wind cap 8, which can make the blown air more uniform. One end of the main air intake pipe is connected to a blower. At the same time, a heating plate is also installed inside the main air intake pipe. The heating plate can heat the blown air, which can simulate the sea breeze temperature in different seasons, thereby obtaining more accurate data.

[0043] Furthermore, an annular water supply pipe 10 is fixedly installed on the inner wall of the outer sleeve 1. The annular water supply pipe 10 is located at the upper part of the outer sleeve 1 and is connected to the water pumping pipe 5. Multiple nozzles 11 are installed on the annular water supply pipe 10. The multiple nozzles 11 are evenly arranged in the circumferential direction for spraying water to one side of the inner sleeve 2. The outlet of the nozzle 11 is tilted downward and faces one side of the inner sleeve 2. The tilt angle of the outlet of the nozzle 11 is 45 degrees. After the liquid is sprayed out by the nozzle 11, it can also wash away the mud and sand adhering to the wall of the inner sleeve 2, so that the inner sleeve 2 remains clean.

[0044] Furthermore, such as Figure 3 As shown, to prevent the sediment inside the outer sleeve 1 from entering the storage tank 3 through the first return pipe 4, a filter assembly 30 is installed on the first return pipe 4 for filtering the sediment. The filter assembly 30 includes a filter cup 12, which is a cylindrical structure with an open top. A water outlet is provided at the center of the lower end of the filter cup 12. A cup cover 13 is fixedly installed on the top of the filter cup 12, and a water inlet is provided at the center of the cup cover 13. A filter screen 14 is installed inside the filter cup 12. The filter screen 14 is a frustum-shaped structure with a large upper diameter and a small lower diameter. The upper end of the filter screen 14 is an open structure. The filter screen 14 and the filter cup 12 are coaxially arranged, and filter paper is laid on the inner wall of the filter screen 14. In this embodiment, the liquid enters the filter cup 12 from the water inlet end of the cup lid 13 and falls into the filter screen 14. After being filtered by the filter paper, the clean liquid falls from the filter screen 14 to the bottom of the filter cup 12 and is discharged from the water outlet end at the bottom of the filter cup 12 into the liquid storage tank 3.

[0045] Furthermore, the upper end of the filter cup 12 is provided with an external thread, and the cup cover 13 includes a cover plate 22 and a locking ring 23 fixedly disposed on the lower end face of the cover plate 22. The inner wall of the locking ring 23 is provided with a thread that matches the external thread on the filter cup 12. Therefore, the filter cup 12 and the locking ring 23 are threadedly connected, thereby fixing the filter cup 12 and the cup cover 13 together. A sealing ring 24 is provided between the filter cup 12 and the cover plate 22 for sealing between the filter cup 12 and the cover plate 22 to prevent liquid leakage.

[0046] Furthermore, an annular locking platform 25 is fixedly provided on the upper part of the inner wall of the filter cup 12, and a support ring 26 is provided on the upper end of the filter screen 14. The support ring 26 rests on the annular locking platform 25, and a limiting ring 27 is fixedly provided on the lower end face of the cover plate 22. When the cup cover 13 and the filter cup 12 are fixedly connected, the side wall of the filter cup 12 is located between the locking ring 23 and the limiting ring 27. At the same time, the limiting ring 27 presses the support ring 26 on the annular locking platform 25 to prevent the filter screen 14 from shaking in the filter cup 12.

[0047] Furthermore, to prevent the filter paper from being damaged by the impact of liquid falling from the water inlet of the cup lid 13 onto the filter screen 14, multiple pull cords 15 are evenly arranged along the circumference of the cup lid 13. The pull cords 15 are made of elastic material, such as rubber bands or springs. One end of the pull cord 15 is fixedly set on the lower end face of the cover plate 22, and the other end of the pull cord 15 is fixedly connected to a baffle 16. The baffle 16 is located at the center of the cup lid 13 and directly below the water inlet of the cup lid 13. The baffle 16 has a circular structure. When the liquid falls from the water inlet of the cup lid 13, it can fall onto the baffle 16, which can play a buffering role. The liquid falls onto the filter screen 14 from the edge of the baffle 16. At the same time, the pull cord 15 has a certain elasticity. The water flow impacts the baffle 16, causing the baffle 16 to move downward, bringing the distance between the baffle 16 and the filter paper closer, thereby reducing the impact of the water flow on the filter paper and preventing damage to the filter paper.

[0048] Furthermore, the inner sleeve 2 is equipped with multiple heating rods 17, which are inserted into the soil. When the heating rods 17 are heating, they can raise the temperature of the liquid and the soil, thereby simulating a high-temperature environment in summer.

[0049] Furthermore, such as Figure 1 and Figure 4As shown, a cooling assembly 31 is installed on the water pumping pipe 5. The cooling assembly 31 includes a cooling box 18, which is connected to the water pumping pipe 5. The cooling box 18 has an inlet and an outlet. When the water pumping pipe 5 draws liquid from the liquid storage tank 3, the liquid can flow in from the inlet of the cooling box 18 and be discharged from the outlet. A cooling pipe 19 is installed inside the cooling box 18. The cooling pipe 19 has a spiral structure, which can increase the contact area between the cooling pipe 19 and the liquid inside the cooling box 18. Cooling water flows inside the cooling pipe 19 to cool the liquid inside the cooling box 18 and reduce the liquid temperature, thereby simulating a low-temperature environment in winter.

[0050] Furthermore, a second return pipe 20 is connected between the outer sleeve 1 and the liquid storage tank 3. One end of the second return pipe 20 is connected to the outer sleeve 1, and the other end is connected to the liquid storage tank 3. A valve 21, which can be a butterfly valve or a gate valve, is installed on the second return pipe 20. In this embodiment, when draining the liquid in the outer sleeve 1, the valve 21 on the second return pipe 20 can be opened to accelerate the drainage speed. The liquid in the outer sleeve 1 can be discharged simultaneously from the first return pipe 4 and the second return pipe 20, thereby accelerating the drainage speed.

[0051] Furthermore, the outer sleeve 1 is provided with a collection chamber 28, which is located below the inner sleeve 2 and around the inner sleeve 2. The collection chamber 28 is used to collect the mud and sand entering the outer sleeve 1. One end of the first return pipe 4 is connected to the bottom of the collection chamber 28. Since the mud and sand are deposited at the bottom of the collection chamber 28, when the liquid in the outer sleeve 1 enters the storage tank 3 through the first return pipe 4, the mud and sand can be filtered by the filter assembly 30, making the liquid entering the storage tank 3 cleaner. One end of the second return pipe 20 is connected to the upper part of the collection chamber 28, and the end of the second return pipe 20 connected to the collection chamber 28 is located below the inner sleeve 2. Since the mud and sand are deposited at the bottom of the collection chamber 28, the liquid above the collection chamber 28 is relatively clean. After the valve 21 of the second return pipe 20 is opened, the liquid that is relatively close to the top of the collection chamber 28 can be discharged from the second return pipe 20, which speeds up the discharge speed and also prevents the mud and sand from entering the storage tank 3.

[0052] Furthermore, the storage tank 3 is equipped with a stirring assembly, which includes a stirring shaft and stirring blades. One end of the stirring shaft is rotatably mounted on the storage tank 3 and can be driven to rotate by a motor fixedly mounted on the storage tank 3. The other end of the stirring shaft extends into the storage tank 3. The stirring blades are fixedly mounted on the end of the stirring shaft located inside the storage tank 3. When the stirring shaft rotates, it drives the stirring blades to rotate, thus stirring the liquid in the storage tank 3. When preparing the liquid, in order to simulate the composition of seawater, it is necessary to add substances such as salt water to the liquid. The stirring of the stirring blades can make the liquid in the storage tank 3 quickly and evenly mixed.

[0053] Furthermore, the storage tank 3 is also connected to an oxygenation pump to oxygenate the liquid inside the storage tank 3, thereby enabling the configuration of a liquid that simulates seawater.

[0054] The method of using the corrosion environment simulation device for simulation experiments includes the following steps: S1. First, the liquid in the storage tank 3 is prepared by adding oxygen to the liquid in the storage tank 3 using an oxygenation pump, so that the liquid in the storage tank 3 forms a 5% saturated sodium chloride brine. The liquid in the storage tank is then drawn into the outer sleeve through a water pumping pipe. The liquid drawn into the water pumping pipe enters the annular water delivery pipe and is sprayed out from the nozzle. The nozzle faces one side of the inner sleeve wall, which can wash away the mud and sand adhering to the inner sleeve wall. As the water pumping pipe continuously draws the liquid from the storage tank into the outer sleeve, it is continued until the inner volume of the outer sleeve is filled to 2 / 3. Liquid can wet the soil through the through holes and sieve plate of the inner sleeve; while water is being drawn from the storage tank, the liquid in the outer sleeve can also flow back to the storage tank through the first return pipe, so that the liquid can complete the circulation; since the first return pipe is equipped with a filter component, the return speed of the first return pipe is relatively slow, and the pumping speed of the water pumping pipe is greater than the return speed of the first return pipe. Therefore, the liquid in the outer sleeve can rise rapidly until the liquid in the outer sleeve rises to 2 / 3 of the internal volume of the outer sleeve. The flow rate of the water pump on the pumping pipe is then reduced so that the pumping speed of the pumping pipe is the same as the drainage speed from the first return pipe, so as to keep the liquid volume in the outer sleeve stable.

[0055] S2. After soaking for a certain period of time, open the valve on the second reflux pipe. The single soaking time is 12 hours. This allows the liquid in the outer sleeve to flow back to the storage tank through the first and second reflux pipes, thus emptying the liquid in the outer sleeve.

[0056] S3. Blow air into the inner sleeve through the air inlet pipe to dry the soil inside the inner sleeve;

[0057] S4. Repeat the above steps. The number of cycles can be selected according to different materials. Please refer to the table below for details. Each model can also be set with multiple cycles to obtain more accurate experimental data.

[0058]

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for simulating corrosion environment of steel sheet piles, characterized in that, Including the outer sleeve (1); The inner sleeve (2) is fixedly installed inside the outer sleeve (1) and is connected to the outer sleeve (1). The inner sleeve (2) is filled with soil, and steel sheet piles are inserted into the soil. A blower assembly (29) is disposed above the inner sleeve (2) and is used to blow air into the inner sleeve (2); The liquid storage tank (3) is connected to the outer sleeve (1) through a first return pipe (4). The first return pipe (4) is equipped with a filter assembly (30). A water pumping pipe (5) is also connected between the liquid storage tank (3) and the outer sleeve (1) to draw the liquid in the liquid storage tank (3) into the outer sleeve (1).

2. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, A sieve plate (6) is fixedly installed inside the inner sleeve (2) for bearing soil. Multiple through holes (7) are opened on the side wall of the inner sleeve (2), and the through holes (7) are located below the sieve plate (6).

3. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, The blower assembly (29) includes a blower cap (8), which is positioned above the inner sleeve (2). A gap is left between the blower cap (8) and the inner sleeve (2). An air inlet pipe (9) is connected to the blower cap (8) for blowing air into the inner sleeve (2).

4. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, An annular water supply pipe (10) is fixedly installed on the inner wall of the outer sleeve (1). The annular water supply pipe (10) is connected to the water pumping pipe (5). A nozzle (11) is installed on the annular water supply pipe (10) for spraying water to one side of the inner sleeve (2).

5. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, The filter assembly (30) includes a filter cup (12), a cup lid (13) is fixedly provided on the top of the filter cup (12), a filter screen (14) is provided inside the filter cup (12), and filter paper is laid on the inner wall of the filter screen (14).

6. The steel sheet pile corrosion environment simulation device according to claim 5, characterized in that, Multiple pull cords (15) are evenly arranged along the circumference of the cup lid (13). One end of each pull cord (15) is fixedly connected to a baffle (16), which is located at the center of the cup lid (13).

7. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, The inner sleeve (2) is provided with a plurality of heating rods (17), which are inserted into the soil.

8. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, A cooling assembly (31) is provided on the water pumping pipe (5). The cooling assembly (31) includes a cooling box (18). The cooling box (18) is connected to the water pumping pipe (5). A cooling pipe (19) is provided inside the cooling box (18). Cooling water flows in the cooling pipe (19) to cool the water flow inside the cooling box (18).

9. The steel sheet pile corrosion environment simulation device according to claim 1, characterized in that, A second return pipe (20) is also connected between the outer sleeve (1) and the liquid storage tank (3), and a valve (21) is provided on the second return pipe (20).

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