System for testing torsional fatigue of corroded steel sheet pile

Abstract

The utility model discloses a torsional fatigue test system after corrosion of a steel sheet pile, which comprises a corrosion device and a torsion device, the corrosion device comprises a corrosion assembly and a liquid storage tank, the steel sheet pile is inserted in the corrosion assembly, the corrosion assembly and the liquid storage tank are connected through a circulation assembly, and a blowing assembly is arranged on the corrosion assembly; the torsion device comprises a support, clamping assemblies are rotationally arranged at the upper end and the lower end of the support, gear rings are fixedly arranged on the clamping assemblies, teeth are arranged on the outer circle faces of the gear rings, a motor is fixedly arranged on the support, the motor is in transmission connection with a gear, and the gear is meshed with the gear rings. According to the utility model, the steel sheet pile is inserted into the corrosion device for corrosion environment simulation, so that the steel sheet pile is corroded in a simulated use state, and then the steel sheet pile is put into the torsion device for torsion fatigue test until the steel sheet pile is broken, thereby obtaining torsion fatigue data of the steel sheet pile after corrosion. The method is used for judging reuse times of the steel sheet pile.

Description

Technical Field

[0001] This utility model relates to the field of steel sheet pile corrosion technology, and in particular to a torsional fatigue testing system for steel sheet piles after corrosion. 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 low tide. This constant ebb and flow causes the soil with the sheet piles to undergo repeated wet and dry cycles, leading to corrosion of the sheet piles. This corrosion affects the service life of the sheet piles. Therefore, torsional fatigue testing is necessary to determine the impact of corrosion on the sheet piles. However, currently, there is no equipment capable of simulating the corrosion environment and conducting torsional fatigue tests on sheet piles. Consequently, it is impossible to test the torsional fatigue of corroded sheet piles, thus hindering data support for corrosion research and the reuse of corroded sheet piles. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a torsional fatigue testing system for steel sheet piles after corrosion.

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

[0006] A torsional fatigue testing system for steel sheet piles after corrosion includes a corrosion device and a torsion device. The corrosion device includes a corrosion component and a liquid storage tank. A steel sheet pile is inserted into the corrosion component. The corrosion component and the liquid storage tank are connected by a circulation component. A blowing component is also provided on the corrosion component.

[0007] The torsion device includes a bracket, with clamping components rotatably mounted at both the upper and lower ends of the bracket. A gear ring is fixedly mounted on the clamping components, and teeth are provided on the outer circumference of the gear ring. A motor is fixedly mounted on the bracket, and a gear is driven by the motor, which meshes with the gear ring.

[0008] Preferably, the corrosion component includes an outer sleeve, an inner sleeve fixedly disposed inside the outer sleeve, the inner sleeve being connected to the outer sleeve, the inner sleeve being filled with soil, steel sheet piles being inserted into the soil, and the air blowing component being disposed above the inner sleeve for blowing air into the inner sleeve.

[0009] 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.

[0010] 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.

[0011] Preferably, the circulation assembly includes a pumping pipe and a first return pipe. One end of the pumping pipe is connected to the liquid storage tank, and the other end is connected to the upper part of the outer sleeve. One end of the first return pipe is connected to the liquid storage tank, and the other end is connected to the bottom of the outer sleeve.

[0012] Preferably, the first return pipe is provided with a filter assembly, the filter assembly includes a filter cup, the top of the filter cup is fixedly provided with a cup lid, the filter cup is provided with a filter screen, and the inner wall of the filter screen is lined with filter paper.

[0013] Preferably, the clamping assembly includes a first clamping block and a second clamping block, both of which are semi-circular structures. The first clamping block is provided with a locking block, and the two side walls of the locking block are inclined. The second clamping block is provided with a locking groove, and the two side walls of the locking groove are inclined. When the first clamping block and the second clamping block are closed, the locking block is locked in the locking groove to clamp the steel sheet pile. The toothed ring is sleeved on the first clamping block and the second clamping block.

[0014] Preferably, the clamping assembly includes a clamping plate rotatably mounted on a bracket, a toothed ring sleeved on the clamping plate, and a clamping groove provided on the clamping plate. The clamping groove contains an outer clamping block, a web clamping block, and an inner clamping block. Two outer clamping blocks are slidably disposed within the clamping groove, and the web clamping block is slidably disposed between the two outer clamping blocks. Two inner clamping blocks are slidably disposed on the web clamping block, and the inner clamping block is slidably disposed on the web clamping block.

[0015] Preferably, a first threaded post and a second threaded post are rotatably provided on the clamping plate. The first threaded post is threadedly connected to the outer clamping block, and the second threaded post is threadedly connected to the web clamping block. A third threaded post is provided between the two inner clamping blocks. The third threaded post is provided with bidirectional threads and is threadedly connected to the two inner clamping blocks respectively.

[0016] The beneficial effects of adopting the above technical solution are as follows:

[0017] In this invention, sheet piles are inserted into a corrosion assembly. Liquid from a storage tank is drawn into the corrosion assembly to wet the sheet piles. After the liquid is drained, air is blown onto the sheet piles to dry them, thus simulating the corrosion conditions of sheet piles in marine environments. The corroded sheet piles are then placed in a torsion device, with both ends fixedly connected to clamping components. A motor drives a gear ring to rotate, thereby driving the clamping components to rotate and torsion the sheet piles until they break. The torsional fatigue number of the corroded sheet piles can be determined, providing data support for the corrosion research of sheet piles and the reuse of corroded sheets. Attached Figure Description

[0018] Figure 1 Flowchart of the use of this utility model;

[0019] Figure 2 This is a schematic diagram of the corrosion device structure of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the windproof cap of this utility model;

[0021] Figure 4 This is a schematic diagram of the filter assembly structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the cooling component structure of this utility model;

[0023] Figure 6 This is a three-dimensional schematic diagram of the torsion device of this utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the clamping component of this utility model;

[0025] Figure 8 This is an exploded view of the clamping assembly of this utility model;

[0026] Figure 9 This is a perspective view of another embodiment of the clamping component of this utility model;

[0027] Figure 10 This is a three-dimensional schematic diagram of the web plate clamping block of this utility model.

[0028] 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 lid, 14 is the filter screen, 15 is the pull rope, 16 is the baffle plate, 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, 32 is the support rod, and 33 is the bracket. 34 is a gear ring, 35 is a motor, 36 is a gear, 37 is a base plate, 38 is a top plate, 39 is the first guide rod, 40 is a lead screw, 41 is the first clamping block, 42 ​​is the second clamping block, 43 is a locking block, 44 is a locking groove, 45 is the first clearance groove, 46 is the second clearance groove, 47 is a limiting groove, 48 is a limiting block, 49 is a connecting plate, 50 is a clamping plate, 51 is a clamping groove, 52 is an outer clamping block, 53 is a web clamping block, 54 is an inner clamping block, 55 is the first threaded post, 56 is the second threaded post, 57 is the third threaded post, 58 is a fixing block, 59 is a locking nut, 60 is a sliding bar, 61 is a sliding groove, 62 is the second guide rod, and 63 is the third guide rod. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figure 1 , Figure 2 and Figure 6 As shown, a torsional fatigue testing system for steel sheet piles after corrosion includes a corrosion device and a torsion device. The corrosion device includes a corrosion component and a liquid storage tank 3. A steel sheet pile is inserted into the corrosion component. The corrosion component and the liquid storage tank 3 are connected by a circulation component, allowing liquid in the liquid storage tank 3 to enter the corrosion component through the circulation component and flow back from the corrosion component to the liquid storage tank 3. The corrosion component is also equipped with a blowing component 29. The corrosion component includes an outer sleeve 1 and an inner sleeve 2, both of which are cylindrical structures with open tops. The bottom of the outer sleeve 1 is fixed to the ground. The bottom of the sleeve 1 has a hole for placing the liquid storage tank 3. 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 set on the bottom surface of the outer sleeve 1. The inner sleeve 2 and the outer sleeve 1 are coaxially arranged and connected to each other, so that liquid can enter the inner sleeve 2 from the outer sleeve 1. The inner sleeve 2 is filled with soil. The soil composition is the same as that of marine soil and can be mixed according to different regions. Steel sheet piles are inserted in the soil. A blowing component 29 is set above the inner sleeve 2, which can blow air into the inner sleeve 2 to simulate the dry state of the soil during low tide.

[0033] The torsion device includes a bracket 33, with clamping components rotatably mounted at both the upper and lower ends of the bracket 33. A gear ring 34 is sleeved on the outer side of the clamping components, and the gear ring 34 and the clamping components are detachably and fixedly connected. The clamping components can rotate synchronously with the gear ring 34. The outer circumference of the gear ring 34 is provided with teeth. A motor 35 is fixedly mounted on the bracket 33. At least two motors 35 are provided, and multiple motors 35 are evenly distributed at the upper and lower ends of the bracket 33. The motors 35 located at the upper and lower ends of the bracket 33 rotate in opposite directions. A gear 36 is fixedly mounted on the output shaft of the motor 35, and the motor 35 can drive the gear 36 to rotate. The gear 36 meshes with the gear ring 34.

[0034] In this invention, sheet piles are first inserted into the soil within a corrosion assembly. Liquid from the storage tank 3 is then transported to the corrosion assembly via a circulation assembly to moisten the soil. The liquid composition can simulate seawater composition, and the soil composition can simulate the soil composition within seawater. As the soil becomes moist, the liquid corrodes the sheet piles. After a certain corrosion time, the liquid in the corrosion assembly is returned to the storage tank 3 via the circulation assembly. A blowing assembly 29 blows air into the soil within the corrosion assembly, simulating sea breeze conditions, to dry the soil. After repeating the above steps, the sheet piles are removed and placed in a torsion device. Both ends of the sheet piles are fixedly connected to the clamping assemblies at the upper and lower ends of the support 33. The motor 35 drives the gear 36 to rotate, causing the gear ring 34 and the clamping assembly to rotate, thereby enabling a torsional fatigue test on the sheet piles. After a certain number of torsional cycles, the sheet piles fracture. Recording the number of fractures allows for the determination of the torsional fatigue life of the corroded sheet piles, thus providing theoretical data for the repeated service life of the sheet piles.

[0035] It should be noted that during the torsion process of the sheet pile, the torsion angle can be within the range of 0° to 45°. A torsion fatigue test is conducted every 5°. For example, torsion is carried out at a torsion angle of 5° until the sheet pile breaks. Then, torsion is carried out at a torsion angle of 10° until the sheet pile breaks. Torsion tests are carried out continuously under these conditions.

[0036] Furthermore, 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 both the outer sleeve 1 and inner sleeve 2 to facilitate observation of the liquid level.

[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 3 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 4 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 2 and Figure 5 As 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] When simulating the corrosion environment of steel sheet piles, the following steps can be taken:

[0055] 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 saline solution. The liquid in the storage tank is then drawn into the outer sleeve through a water pumping pipe. After entering the annular water delivery pipe, the liquid is sprayed out from the nozzle, which faces one side of the inner sleeve wall, effectively washing away the mud and sand adhering to the inner sleeve wall. As the water pumping pipe continuously draws liquid from the storage tank into the outer sleeve, until the inner sleeve is filled to 2 / 3 of its internal volume, the liquid can pass through the through holes and sieves of the inner sleeve. The plate wets the soil; while water is being drawn from the storage tank, the liquid inside the outer sleeve can also flow back to the storage tank through the first return pipe, thus completing the liquid 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 speed of the water pumping pipe is greater than the return speed of the first return pipe, so the liquid inside the outer sleeve can rise rapidly until the liquid inside the outer sleeve rises to 2 / 3 of the internal volume of the outer sleeve. The flow rate of the water pump on the water pumping pipe is then reduced so that the water pumping speed of the water pumping pipe is the same as the drainage speed from the first return pipe, thus keeping the liquid volume inside the outer sleeve stable;

[0056] 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.

[0057] S3. Blow air into the inner sleeve through the air inlet pipe to dry the soil inside the inner sleeve;

[0058] 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.

[0059]

[0060] Furthermore, such as Figure 6As shown, the support 33 includes a base plate 37 and a top plate 38, which are arranged in parallel. Multiple first guide rods 39 are fixedly installed on the edge of the base plate 37, and the first guide rods 39 are vertically arranged. The top plate 38 is slidably mounted on the first guide rods 39. The outer wall of the first guide rods 39 has a scale along its length to mark the height of the top plate 38. A lead screw 40 is rotatably mounted on the base plate 37, and a lead screw nut is mounted on the top plate 38. The lead screw nut on the top plate 38 is threadedly connected to the lead screw 40. Rotation of the lead screw 40 allows the top plate 38 to rise or fall, thereby adjusting the distance between the base plate 37 and the top plate 38 to accommodate sheet piles of different lengths. Clamping assemblies are rotatably mounted on the base plate 37 and the top plate 38 respectively. Similarly, a motor 35 is fixedly mounted on the base plate 37 and the top plate 38, driving the clamping assemblies to rotate on the base plate 37 and the top plate 38, causing the sheet pile to twist.

[0061] In one embodiment, such as Figure 7 and Figure 8 As shown, the clamping assembly includes a first clamping block 41 and a second clamping block 42. Both the first clamping block 41 and the second clamping block 42 are semi-circular structures. The first clamping block 41 is provided with a locking block 43. The two side walls of the locking block 43 are inclined and adapted to the inclination angle of the two side plates of the steel sheet pile. The second clamping block 42 is provided with a locking groove 44. The two side walls of the locking groove 44 are inclined and adapted to the inclination angle of the two side plates of the steel sheet pile. When the first clamping block 41 and the second clamping block 42 are closed, the locking block 43 is locked in the locking groove 44 to clamp the steel sheet pile. The toothed ring 34 is sleeved on the first clamping block 41 and the second clamping block 42. In this embodiment, the end of the sheet pile is positioned between the first clamping block 41 and the second clamping block 42. As the first clamping block 41 and the second clamping block 42 close, the sheet pile is clamped in the slot 44. The side wall of the slot 44 is in contact with the sheet pile. At the same time, when the clamping block 43 is clamped in the slot 44, it can clamp and fix the sheet pile. When the first clamping block 41 and the second clamping block 42 close, they form a circular structure. Then, the toothed ring 34 is sleeved on the outside of the first clamping block 41 and the second clamping block 42. The toothed ring 34 meshes with the gear 36. As the gear 36 drives the toothed ring 34 to rotate, the end of the sheet pile rotates, thereby performing a torsion test on the sheet pile.

[0062] Furthermore, a first clearance groove 45 is provided at one end of the slot 44 near the first clamping block 41, and a second clearance groove 46 is provided at the bottom end of the slot 43. When the first clamping block 41 and the second clamping block 42 are closed, the first clearance groove 45 and the second clearance groove 46 are connected. The locking port on the sheet pile is located inside the first clearance groove and the second clearance groove to prevent the locking port from interfering with the first locking block 9 and the second locking block 10.

[0063] Furthermore, the thickness of the first clamping block 41 and the second clamping block 42 is greater than the thickness of the toothed ring 34. When the toothed ring 34 is fitted onto the first clamping block 41 and the second clamping block 42, the toothed ring 34 is located on the upper part of the first clamping block 41 and the second clamping block 42. Rotation holes are provided on the bottom plate 37 and the top plate 38. The lower parts of the first clamping block 41 and the second clamping block 42 are rotatably set in the rotation holes. At this time, the toothed ring 34 can also prevent the first clamping block 41 and the second clamping block 42 from falling out of the rotation holes.

[0064] Furthermore, multiple limiting grooves 47 are evenly provided on the outer circular surfaces of the first clamping block 41 and the second clamping block 42, and multiple limiting blocks 48 are provided on the inner ring of the gear ring 34. The limiting blocks 48 are locked in the limiting grooves 47, which can prevent relative rotation between the gear ring 34 and the first clamping block 41 and the second clamping block 42.

[0065] Furthermore, the first clamping block 41 and the second clamping block 42 are fixedly connected by multiple connecting plates 49. Specifically, threaded holes are provided on the upper end faces of both the first clamping block 41 and the second clamping block 42, and two bolts are rotatably provided on the connecting plate 49. One bolt on the connecting plate 49 is threadedly connected to the threaded hole on the first clamping block 41, and the other bolt is threadedly connected to the threaded hole on the second clamping block 42, thereby fixing the first clamping block 41 and the second clamping block 42 together.

[0066] In another embodiment, such as Figure 9 and Figure 10 As shown, the clamping assembly includes a clamping plate 50, which is circular in structure and rotatably mounted on a bracket 33. A toothed ring 34 is fitted onto the outer circumference of the clamping plate 50. A clamping groove 51 is formed in the middle of the clamping plate 50. An outer clamping block 52, a web clamping block 53, and an inner clamping block 54 are provided within the clamping groove 51. The outer clamping blocks 52 are horizontally slidably disposed within the clamping groove 51. Two outer clamping blocks 52 are provided and symmetrically arranged along the vertical center plane of the clamping plate 50. The two outer clamping blocks 52 can slide towards or away from each other. 2. The sides of the two clamping blocks are inclined and close to each other, which are adapted to the two side walls of the sheet pile. The web clamping block 53 is horizontally slidably disposed between the two outer clamping blocks 52. The sliding direction of the web clamping block 53 is perpendicular to the sliding direction of the outer clamping block 52. The inner clamping block 54 is horizontally slidably disposed on the web clamping block 53. There are two inner clamping blocks 54, which are symmetrically disposed along the vertical center plane of the clamping plate 50. The two inner clamping blocks 54 can slide in a direction that is close to or far away from each other. The sides of the two inner clamping blocks 54 close to the outer clamping blocks 52 are inclined and adapted to the two side walls of the sheet pile.

[0067] In this embodiment, the end of the sheet pile is placed in the clamping groove 51, and two outer clamping blocks 52 are located on both sides of the sheet pile. As the two outer clamping blocks 52 slide towards each other, the two sides of the sheet pile can be clamped. At the same time, the web clamping block 53 slides towards the side of the sheet pile to clamp the inner web of the sheet pile, while the two inner clamping blocks 54 slide away from each other to clamp and fix the two side walls of the sheet pile. With the combined action of the outer clamping blocks 52, the web clamping blocks 53 and the inner clamping blocks 54, the end of the sheet pile is clamped and fixed.

[0068] Furthermore, clearance grooves are provided on the sides of the outer clamping blocks 52 that are close to each other, and the locking jaws of the sheet piles are locked in the clearance grooves to prevent the locking jaws from interfering with the outer clamping blocks 52.

[0069] Furthermore, the thickness of the clamping plate 50 is greater than the thickness of the toothed ring 34. After the toothed ring 34 is fitted onto the clamping plate 50, the toothed ring 34 is located on the upper part of the clamping plate 50. Rotation holes are provided on the bottom plate 37 and the top plate 38. The lower part of the clamping plate 50 is rotatably set in the rotation hole. The toothed ring 34 can prevent the clamping plate 50 from falling out of the rotation hole.

[0070] Furthermore, multiple limiting grooves 47 are evenly provided on the outer circular surface of the clamping plate 50 along the circumferential direction, and multiple limiting blocks 48 are evenly provided on the inner circular surface of the gear ring 34 along the circumferential direction. When the gear ring 34 is fitted onto the clamping plate 50, the limiting blocks 48 are locked in the limiting grooves 47 to prevent relative rotation between the gear ring 34 and the clamping plate 50.

[0071] Furthermore, a first threaded post 55 and a second threaded post 56 are rotatably disposed on the clamping plate 50. Both the first threaded post 55 and the second threaded post 56 are horizontally disposed in the clamping groove 51, and their length directions are perpendicular. The first threaded post 55 is threadedly connected to the outer clamping block 52, and the outer clamping block 52 slides in the clamping groove 51 by rotating the first threaded post 55. The second threaded post 56 is threadedly connected to the web clamping block 53, and the web clamping block 53 slides in the clamping groove 51 by rotating the second threaded post 56. A third threaded post 57 is disposed between the two inner clamping blocks 54. The third threaded post 57 is provided with bidirectional threads and is threadedly connected to the two inner clamping blocks 54 respectively. Therefore, when the third threaded post 57 is rotated, the two inner clamping blocks 54 can slide in a direction that moves closer to each other or further away from each other.

[0072] Furthermore, fixing blocks 58 are fixedly installed on the first threaded post 55, the second threaded post 56, and the third threaded post 57. The fixing blocks 58 have a hexagonal structure, which facilitates clamping with a wrench. By clamping the fixing blocks 58 with a wrench, the first threaded post 55, the second threaded post 56, and the third threaded post 57 can be rotated. The fixing block 58 on the third threaded post 57 is located in the middle of the third threaded post 57. In addition, locking nuts 59 are threadedly connected to the first threaded post 55, the second threaded post 56, and the third threaded post 57. Two locking nuts 59 are symmetrically provided on the third thread 23. After the positions of the outer clamping block 52, the web clamping block 53, and the inner clamping block 54 are adjusted, the locking nuts 59 can be rotated to lock and fix the outer clamping block 52, the web clamping block 53, and the inner clamping block 54.

[0073] Furthermore, such as Figure 10 As shown, a slide bar 60 is provided on the web clamping block 53, and a slide groove 61 is provided on the inner clamping block 54. The slide bar 60 is located in the slide groove 61 and is limited when the inner clamping block 54 slides along the upper end face of the web clamping block 53, so that the inner clamping block 54 can only slide along the length direction of the slide bar 60.

[0074] Furthermore, a second guide rod 62 and a third guide rod 63 are fixedly installed in the clamping groove 51. The second guide rod 62 is arranged parallel to the first threaded post 55, and the outer clamping block 52 is slidably disposed on the second guide rod 62. The third guide rod 63 is arranged parallel to the second threaded post 56, and the web clamping block 53 is slidably disposed on the third guide rod 63, which can prevent the outer clamping block 52 and the web clamping block 53 from rotating in the clamping groove 51.

[0075] Furthermore, the thickness of the web clamping block 53 is less than the thickness of the outer clamping block 52.

[0076] 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 torsional fatigue testing system for steel sheet piles after corrosion, characterized in that, It includes a corrosion device and a torsion device. The corrosion device includes a corrosion component and a liquid storage tank. Steel sheet piles are inserted into the corrosion component. The corrosion component and the liquid storage tank are connected by a circulation component. A blowing component is also provided on the corrosion component. The torsion device includes a bracket, with clamping components rotatably mounted at both the upper and lower ends of the bracket. A gear ring is fixedly mounted on the clamping components, and teeth are provided on the outer circumference of the gear ring. A motor is fixedly mounted on the bracket, and a gear is driven by the motor, which meshes with the gear ring.

2. The torsional fatigue testing system for steel sheet piles after corrosion according to claim 1, characterized in that, The corrosion component includes an outer sleeve, an inner sleeve fixedly disposed inside the outer sleeve, the inner sleeve being connected to the outer sleeve, the inner sleeve being filled with soil, steel sheet piles being inserted into the soil, and a blowing component being disposed above the inner sleeve for blowing air into the inner sleeve.

3. The system for testing the torsional fatigue of a steel sheet pile after corrosion according to claim 2, wherein A sieve plate is fixedly installed inside the inner sleeve to support the soil. Multiple through holes are provided on the side wall of the inner sleeve, and the through holes are located below the sieve plate.

4. The system for testing the torsional fatigue of a steel sheet pile after corrosion according to claim 1, wherein The blower assembly includes a blower cap, which is positioned above the inner sleeve. A gap is left between the blower cap and the inner sleeve. An air inlet pipe is connected to the blower cap for blowing air into the inner sleeve.

5. The torsional fatigue testing system for steel sheet piles after corrosion according to claim 2, characterized in that, The circulation assembly includes a pumping pipe and a first return pipe. One end of the pumping pipe is connected to the liquid storage tank, and the other end is connected to the upper part of the outer sleeve. One end of the first return pipe is connected to the liquid storage tank, and the other end is connected to the bottom of the outer sleeve.

6. The torsional fatigue testing system for steel sheet piles after corrosion according to claim 5, characterized in that, The first return pipe is equipped with a filter assembly, which includes a filter cup, a cup lid fixedly installed on the top of the filter cup, a filter screen installed inside the filter cup, and filter paper laid on the inner wall of the filter screen.

7. The torsional fatigue testing system for steel sheet piles after corrosion according to claim 1, characterized in that, The clamping assembly includes a first clamping block and a second clamping block, both of which are semi-circular structures. The first clamping block is provided with a locking block, and the two side walls of the locking block are inclined. The second clamping block is provided with a locking groove, and the two side walls of the locking groove are inclined. When the first clamping block and the second clamping block are closed, the locking block is locked in the locking groove to clamp the steel sheet pile. The toothed ring is sleeved on the first clamping block and the second clamping block.

8. The torsional fatigue testing system for steel sheet piles after corrosion according to claim 1, characterized in that, The clamping assembly includes a clamping plate rotatably mounted on a bracket. A toothed ring is sleeved on the clamping plate. The clamping plate has a clamping groove, and an outer clamping block, a web clamping block, and an inner clamping block are provided in the clamping groove. Two outer clamping blocks are slidably disposed in the clamping groove, and the web clamping block is symmetrically arranged. Two inner clamping blocks are slidably disposed between the two outer clamping blocks. Two inner clamping blocks are symmetrically arranged and slidably disposed on the web clamping block.

9. The system for testing the torsional fatigue of a steel sheet pile after corrosion according to claim 8, wherein The clamping plate is rotatably provided with a first threaded post and a second threaded post. The first threaded post is threadedly connected to the outer clamping block, and the second threaded post is threadedly connected to the web clamping block. A third threaded post is provided between the two inner clamping blocks. The third threaded post is provided with bidirectional threads and is threadedly connected to the two inner clamping blocks respectively.

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