Sediment removal and pouring device and method in diaphragm wall construction

Abstract

The application provides a device and method for removing and pouring sediment in underground continuous wall construction, and belongs to the technical field of geotechnical engineering underground continuous wall construction. The device comprises an outer pipe and an inner pipe. The bottom end of the inner pipe is lower than the bottom end of the outer pipe, and the inner pipe is nested in the inner part of the outer pipe. A protective cover is arranged on the outer side of the bottom end of the inner pipe. A plurality of fan-shaped blades are rotatably arranged on the bottom end edge of the protective cover. The plurality of fan-shaped blades form a cone with a downward pointed end in a folded state to facilitate lowering and pulling out. The plurality of fan-shaped blades form an inverted cone with an upward pointed end in an unfolded state. A driving assembly is arranged in the protective cover, and the driving assembly is used to drive the plurality of fan-shaped blades to fold or unfold. The plurality of fan-shaped blades are unfolded to form an inverted cone with an upward pointed end. The sediment cover at the bottom of the groove is buckled in the space in the cover, which prevents the sediment from escaping laterally to the edge of the groove during negative pressure suction, and further eliminates the technical effects of leakage and local weak hidden dangers caused by the sediment being pushed to the side of the wall or wrapped in the corner of the wall.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering diaphragm wall construction technology, and more specifically, to a device and method for sediment removal and pouring during diaphragm wall construction. Background Technology

[0002] Diaphragm walls are a widely used retaining structure in underground engineering projects such as deep foundations of high-rise buildings, subway stations, underground tunnels, and seepage prevention walls for water conservancy and hydropower projects. The construction process of a diaphragm wall typically includes the following steps: First, a guide wall is constructed on the ground surface to guide and stabilize the trench opening; then, a long, narrow trench is excavated in the soil using trenching equipment; during trenching, protective slurry is injected into the trench, and the liquid column pressure of the slurry is greater than the lateral earth pressure and water pressure of the soil, thus maintaining the stability of the trench wall; after trenching is completed, a pre-tied steel cage is suspended under the slurry; finally, underwater concrete is poured into the trench through a tremie pipe, and the concrete flows out from the bottom of the tremie pipe and pushes upwards against the slurry, eventually solidifying to form a reinforced concrete wall segment. Multiple wall segments are connected by joints to form a continuous underground wall.

[0003] In the construction of diaphragm walls, the presence of sediment at the bottom of the trench is a key factor affecting the quality and load-bearing capacity of the wall. Sediment refers to a layer of soft deposits formed when loosened soil, gravel, rock fragments, and other solid particles mix with the slurry during trenching and gradually settle to the bottom of the trench under static conditions. Sediment is characterized by low strength, high compressibility, and high permeability. If it is not effectively removed, it will lead to serious quality problems such as excessive settlement of the diaphragm wall, reduced end bearing capacity, and leakage channels between the wall and the bearing layer. Therefore, how to efficiently and thoroughly remove sediment from the bottom of the trench before pouring concrete, and ensure that the removal results are not destroyed in subsequent processes, has long been a core issue of concern in the field of diaphragm wall construction technology.

[0004] Existing sediment removal technologies mainly include pump suction cleaning, reverse circulation mud cleaning, and air lift cleaning. Pump suction cleaning involves directly using a high-powered mud pump to extract sediment-containing mud from the bottom of the tank. However, during negative pressure suction, the sediment moves towards the suction port under the suction force. Since the tank bottom is an open space, the sediment also diffuses and escapes laterally as it moves towards the suction port. Especially near the tank walls and at wall joints, the sediment is easily pushed into corners by the suction force and cannot be effectively sucked in, forming "ear-shaped" sediment residue. This laterally escaped sediment is then pushed to the side of the wall or trapped in the corners during subsequent concrete pouring, becoming a potential hazard for wall leakage and localized weakness. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for removing and pouring sediment during the construction of underground continuous walls, which can solve the defects in the prior art where sediment escapes laterally to the bottom edge of the trench, causing the sediment to be pushed to the side of the wall or wrapped around the corner of the wall by the concrete, thus leading to wall leakage and local weakness.

[0006] In a first aspect, the embodiments of the present invention are achieved through the following technical solution: a sludge removal and pouring device in the construction of a diaphragm wall, comprising an outer pipe and an inner pipe, wherein the bottom end of the inner pipe is lower than the bottom end of the outer pipe, the inner pipe is nested inside the outer pipe for sucking up sludge or injecting thixotropic mud, and the annular space between the outer pipe and the inner pipe is used for conveying concrete. A protective cover is provided on the outer side of the bottom end of the inner tube. Multiple fan-shaped blades are rotatably arranged on the bottom edge of the protective cover. When the multiple fan-shaped blades are closed, they form a cone with the tip pointing downwards to facilitate lowering and pulling out. When the multiple fan-shaped blades are unfolded, they form an inverted cone-shaped cover with the tip pointing upwards. The inverted cone-shaped cover is used to cover the sediment at the bottom of the tank in the space inside the cover to prevent the sediment from escaping laterally to the edge of the bottom of the tank during the negative pressure suction process. A drive assembly is disposed within the protective cover and is used to drive the multiple fan-shaped blades to retract or expand.

[0007] Furthermore, the drive assembly includes a drive cylinder, a lifting ring, a sliding rail, and a connecting rod; The driving cylinder and the lifting ring are disposed between the protective cover and the inner tube. The top surface of the lifting ring is fixedly connected to the piston rod of the driving cylinder. The side surface of the lifting ring is sealed and abuts against the inner wall of the protective cover and the outer wall of the inner tube, respectively. The driving cylinder drives the lifting ring to slide along the axial direction of the inner tube. The sliding track is disposed on the bottom surface of the lifting ring and is distributed radially. The top end of the connecting rod is slidably disposed on the sliding track. The top end of the fan-shaped blade is fixedly disposed with an extension rod. The end of the extension rod is hinged to the bottom end of the connecting rod.

[0008] Furthermore, a sealing strip is provided on one side edge of the fan-shaped blade, and a sealing groove is provided on the opposite edge of the adjacent fan-shaped blade. The sealing strip is provided with a pressurizable expansion auxiliary cavity. After the inverted conical cover is fully unfolded, the sealing strip expands and embeds into the sealing groove.

[0009] Furthermore, the inner surface of the fan-shaped blade is provided with a slurry storage hole, and the inner wall of the slurry storage hole is coated with a release agent. The slurry storage hole is used to transport the quick-setting material into the space inside the cover and form an artificial hard bottom after hardening.

[0010] Furthermore, the outer surface of the fan-shaped blade is provided with flushing holes, which are connected to external facilities to spray high-pressure water flow to assist in penetrating the hard soil layer at the bottom of the tank when the device is lowered and to ensure that the inverted cone cover completely covers the sediment layer at the bottom of the tank.

[0011] Furthermore, a release cover is provided at the bottom end of the outer tube, and the release cover is provided on the outside of the inner tube. The release cover includes an upper cover and a lower cover. The diameter of the top end of the upper cover is larger than the diameter of the bottom end. The top end of the upper cover is connected to the bottom end of the outer tube. A slurry outlet is opened on the side of the top end of the upper cover. The diameter of the top end of the lower cover is smaller than the diameter of the bottom end. The bottom end of the upper cover is connected to the top end of the lower cover.

[0012] Furthermore, the inner surface of the fan-shaped blade is provided with conical spikes, which extend and penetrate the sediment layer when the inverted conical cover is in the unfolded state.

[0013] Secondly, embodiments of the present invention are achieved through the following technical solution: a method for a sediment removal and pouring device applied in the construction of a diaphragm wall as described in the above solution, comprising: S1. Flip the fan-shaped blades downwards to form a cone with the tip pointing downwards, and lower the device to the bottom of the trough along the guide wall in the folded state. S2. Drive the lifting ring down to the lower limit position, and through the change of the angle between the connecting rod and the extension rod, cause the fan-shaped blades to flip upward and unfold, forming an inverted cone-shaped cover with the tip pointing upward. The inverted cone-shaped cover covers the sediment at the bottom of the tank in the space inside the cover. S3. A negative pressure is formed by connecting the vacuum system through the inner tube, and the sediment in the inverted cone hood is sucked to the ground for separation. During the suction process, the inverted cone hood remains in the unfolded state to limit the movement range of the sediment. S4. Inject quick-setting material into the bottom of the tank through the slurry storage hole and wait for it to harden to form an artificial hard bottom; S5. The device moves along the bottom of the tank to suck out the sediment from the bottom of the tank in sequence; S6. Concrete is poured through the outer pipe, and the inverted cone cover remains in an extended state during the pouring process; S7. Drive the lifting ring to rise, causing the fan-shaped blades to flip downwards and retract into a cone shape with the tip pointing downwards, thus pulling the entire device out of the slot.

[0014] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: 1. The present invention uses fan-shaped blades to form an inverted cone-shaped cover with the tip pointing upwards, which covers the sediment at the bottom of the tank in the space inside the cover, preventing the sediment from escaping to the edge of the bottom of the tank laterally during the negative pressure suction process, thereby eliminating the leakage and local weakness caused by the sediment being pushed to the side of the wall by the concrete or wrapped in the corner of the wall. 2. The present invention achieves the technical effect of actively sealing the joint of the fan-shaped blade by setting a sealing strip with an expansion auxiliary cavity on one side edge of the fan-shaped blade and setting a sealing groove on the opposite edge. After the inverted conical cover is unfolded, the sealing strip expands and embeds into the sealing groove, thereby preventing sediment from escaping laterally from the gap between the fan-shaped blades. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram used to illustrate the internal structure in this invention; Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is an exploded schematic diagram used in this invention to illustrate the assembly relationship between the release cover, the inner tube, and the protective cover; Figure 5 for Figure 2 Enlarged schematic diagram of part B in the middle; Figure 6 This is a schematic diagram illustrating the assembly relationship of the fan-shaped blades in this invention; Figure 7 This is a schematic diagram illustrating the inner surface structure of the fan-shaped blade in this invention; Figure 8 This is a schematic diagram illustrating the outer surface structure of the fan-shaped blade in this invention; Figure 9 This is a schematic diagram of the process for removing sediment and pouring concrete during the construction of a diaphragm wall in this invention. Icons: 10. Outer tube; 11. Inner tube; 12. Release cover; 121. Upper cover; 122. Lower cover; 123. Slurry outlet; 124. Sliding groove; 125. Sliding ring; 126. Inner spiral; 13. Protective cover; 131. Outer spiral; 14. Drive assembly; 141. Drive cylinder; 142. Lifting ring; 143. Sliding track; 144. Connecting rod; 15. Fan-shaped blade; 151. Conical spike; 152. Sealing strip; 153. Sealing groove; 154. Slurry storage hole; 155. Flushing hole; 156. Extension rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The following description, in conjunction with specific embodiments, provides further details. Figures 1-8 As shown, the present invention is a device for sediment removal and pouring during the construction of diaphragm walls. It includes a coaxial double-layer sleeve, a release hood 12, a protective hood 13, a drive assembly 14, and a fan-shaped blade 15.

[0019] Reference Figure 1 and Figure 2 The coaxial double-layer casing includes an outer pipe 10 and an inner pipe 11. The outer pipe 10 is used to transport concrete. The inner pipe 11 is used to suction sludge or inject thixotropic mud. The inner diameter of the inner pipe 11 meets the requirements for the passage of sand-containing mud. The inner pipe 11 is nested inside the outer pipe 10, and the two pipes are coaxial. The outer wall surface of the inner pipe 11 is coated with a polytetrafluoroethylene (PTFE) coating to reduce the sliding friction resistance between the outer wall of the inner pipe 11 and the inner wall of the outer pipe 10. The bottom end of the inner pipe 11 is lower than the bottom end of the outer pipe 10 to ensure that the suction port can reach the deepest part of the tank bottom during sludge removal. The gap between the inner wall of the outer pipe 10 and the outer wall of the inner pipe 11 forms an annular space. This annular space serves as a concrete transport channel in the device.

[0020] Reference Figure 1 The bottom end of the outer pipe 10 is provided with a release cover 12. The bottom end of the release cover 12 is placed on the outside of the inner pipe 11 to guide the concrete to flow out of the annular space and spread evenly to the surrounding area, while preventing the concrete from directly impacting the sediment layer at the bottom of the tank.

[0021] Reference Figures 1-3 The release cover 12 includes an upper cover 121 and a lower cover 122. The diameter of the top end of the upper cover 121 is larger than the diameter of the bottom end of the upper cover 121. The top end of the upper cover 121 is fixedly connected to the bottom end of the outer tube 10. A grout outlet 123 is obliquely opened on the side of the top end of the upper cover 121, and multiple grout outlets 123 are evenly distributed around the circumference of the upper cover 121 for uniformly discharging concrete around it. A sliding groove 124 is opened on the bottom surface of the upper cover 121, and the sliding groove 124 is an annular groove.

[0022] The diameter of the top end of the lower cover 122 is smaller than the diameter of the bottom end of the lower cover 122, and the cone direction of the lower cover 122 is opposite to that of the upper cover 121. A sliding ring 125 is provided at the top end of the lower cover 122. The sliding ring 125 is an annular protrusion and is slidably embedded in the sliding groove 124 on the bottom surface of the upper cover 121. The cooperation between the sliding ring 125 and the sliding groove 124 allows the lower cover 122 to rotate axially relative to the upper cover 121, while preventing the lower cover 122 from falling out of the upper cover 121.

[0023] Reference Figure 4 The inner surface of the lower cover 122 is provided with raised inner spiral strips 126. The inner spiral strips 126 are spirally distributed around the axis of the lower cover 122, extending from the top to the bottom of the lower cover 122. The inner spiral strips 126 guide the concrete to rotate as it flows out from under the lower cover 122, resulting in a more even distribution of the concrete around the bottom of the tank. They also allow the lower cover 122 to rotate axially relative to the upper cover 121.

[0024] Reference Figure 4 A protective cover 13 is fitted onto the lower side wall of the inner tube 11. The protective cover 13 has a cylindrical structure and is used to house the drive assembly 14 and protect the internal mechanism from external mud intrusion. The top of the protective cover 13 is inclined. The bottom of the lower cover 122 covers the top of the protective cover 13, and a gap is provided between the bottom of the lower cover 122 and the top of the protective cover 13 for concrete to flow out. An outer spiral strip 131 is provided on the outer surface of the top of the protective cover 13, and the outer spiral strip 131 is spirally distributed around the axis of the protective cover 13. The spiral direction of the outer spiral strip 131 is opposite to that of the inner spiral strip 126. The outer spiral strip 131 and the inner spiral strip 126 work together to create a complex turbulent mixing effect when the concrete flows out, further improving the uniformity of concrete distribution.

[0025] Reference Figure 2 and Figure 5 The drive assembly 14 is disposed within the protective cover 13 and includes a drive cylinder 141, a lifting ring 142, a sliding rail 143, and a connecting rod 144. The drive cylinder 141 and the lifting ring 142 are disposed between the protective cover 13 and the inner tube 11. The cylinder body of the drive cylinder 141 is fixedly mounted on the inner wall of the protective cover 13 or the outer wall of the inner tube 11, and the piston rod of the drive cylinder 141 extends vertically downward. The lifting ring 142 is an annular component, sleeved on the outer wall of the inner tube 11, and located below the drive cylinder 141. The top surface of the lifting ring 142 is fixedly connected to the piston rod of the drive cylinder 141. The drive cylinder 141 drives the lifting ring 142 to slide downward along the axis of the inner tube 11.

[0026] The sides of the lifting ring 142 are sealed against the inner wall of the protective cover 13 and the outer wall of the inner tube 11 to prevent external mud from entering the hydraulic chamber above the lifting ring 142. A sliding track 143 is disposed on the bottom surface of the lifting ring 142 and is distributed radially along the lifting ring 142. The top end of the connecting rod 144 is slidably disposed on the sliding track 143. The connecting rod 144 is a rigid rod extending vertically. The number of connecting rods 144 is the same as the number of fan-shaped blades 15, and they are evenly distributed in a ring around the axis of the lifting ring 142.

[0027] Reference Figure 2 The bottom edge of the protective cover 13 is rotatably provided with multiple fan-shaped blades 15. The fan-shaped blades 15 are evenly distributed in a ring around the axis of the protective cover 13. The top of each fan-shaped blade 15 is rotatably connected to the bottom edge of the protective cover 13 through a hinge shaft, and the fan-shaped blade 15 can be flipped up or down around the hinge shaft.

[0028] The multiple fan-shaped blades 15, when retracted, form a cone with their tips pointing downwards. This cone structure effectively reduces mud resistance during lowering and retraction of the device, while the cone tips do not damage the bearing layer at the bottom of the tank. When deployed, the multiple fan-shaped blades 15 form an inverted conical cover with their tips pointing upwards. This inverted conical cover is used to secure the sediment at the bottom of the tank within the cover's internal space, preventing the sediment from escaping laterally towards the edge of the tank bottom during negative pressure suction.

[0029] Reference Figure 6 Multiple fan-shaped blades 15 are arranged in a stacked, overlapping manner around the center of the sludge compression disc. That is, the inner end of each fan-shaped blade 15 covers the outer end of the adjacent fan-shaped blade 15; in other words, when viewed from the center, one side of the first fan-shaped blade 15 overlaps the second fan-shaped blade 15. In the unfolded state, the fan-shaped blades 15 support each other, forming a continuous, seamless inverted conical cover. Any downward gaps are covered by the upper fan-shaped blades 15, preventing sludge from leaking out from the gaps between the fan-shaped blades 15. In the retracted state, the fan-shaped blades 15 slide against each other via inclined guides, automatically adjusting the stacking relationship without interference.

[0030] Reference Figure 7 The inner surface of the fan-shaped blade 15 is provided with a conical spike 151. When the inverted conical cover is in the unfolded state, the conical spike 151 extends and penetrates the sludge layer, further confining the sludge inside the inverted conical cover and preventing the sludge from escaping to the side from the gap between the edge of the fan-shaped blade 15 and the bottom of the tank during the negative pressure suction process.

[0031] Reference Figure 7 and Figure 8A sealing strip 152 is provided on one edge of the inner surface of the fan-shaped blade 15, and a sealing groove 153 is provided on the opposite edge of adjacent fan-shaped blades 15. The sealing groove 153 is located on one edge of the outer surface of the fan-shaped blade 15. The sealing strip 152 and the conical spike 151 are located at opposite ends of the inner surface of the fan-shaped blade 15. The cross-sectional shape of the sealing strip 152 is arrow-shaped, with the arrowhead pointing towards the adjacent fan-shaped blade 15. The cross-sectional shape of the sealing groove 153 is dovetail-shaped, matching the arrow-shaped cross-sectional shape of the sealing strip 152. When the fan-shaped blade 15 unfolds, the sealing strip 152 enters the sealing groove 153, and the arrow-shaped cross-section and the dovetail-shaped groove form an interlocking structure. A pressurizable expansion auxiliary cavity is provided inside the sealing strip 152, which extends through the entire sealing strip 152 along its length. The expansion auxiliary cavity is connected to the external pump body through a micro-channel opened inside the fan-shaped blade 15. After the inverted conical cover is fully deployed, low-pressure gas or liquid is introduced into the expansion auxiliary chamber, causing the sealing strip 152 to expand outward and tightly fill the entire space of the sealing groove 153, achieving active forced sealing and further preventing sediment from escaping laterally from the gaps between the fan-shaped blades 15. When it is necessary to retract the fan-shaped blades 15, the pressure in the expansion auxiliary chamber is released, and the sealing strip 152 retracts due to its own elasticity, exiting from the sealing groove 153.

[0032] Reference Figure 7 The inner surface of the fan-shaped blade 15 has a slurry storage hole 154. The slurry storage hole 154 is located near the inner end of the inner surface of the fan-shaped blade 15. The inner wall of the slurry storage hole 154 is coated with a release agent to prevent the quick-setting material from adhering to the fan-shaped blade 15 after hardening. The slurry storage hole 154 is used to transport the quick-setting material into the space inside the cover. After the quick-setting material hardens in the area of ​​the slurry storage hole 154, it forms an artificial hard bottom. The artificial hard bottom remains at the bottom of the tank after the inverted conical cover is removed, sealing the edge path that the sediment may escape.

[0033] Reference Figure 8 The outer surface of the fan-shaped blade 15 is also provided with flushing holes 155. The flushing holes 155 are micro-nozzle structures. The flushing holes 155 are connected to external facilities through micro-channels opened inside the fan-shaped blade 15. They are used to spray high-pressure water flow when the device is lowered to help penetrate the hard soil layer at the bottom of the tank and ensure that the inverted cone cover can completely cover the sediment layer at the bottom of the tank.

[0034] Reference Figure 7 An extension rod 156 is fixedly provided at the top of the fan-shaped blade 15. The top of the extension rod 156 is inclined toward the inside of the fan-shaped blade 15, and the end of the extension rod 156 is hinged to the bottom of the connecting rod 144.

[0035] Reference Figures 5-7When the drive cylinder 141 drives the lifting ring 142 to move upward, the lifting ring 142 drives the connecting rod 144 to move away from the axis. The connecting rod 144 pulls the extension rod 156 upward, causing the top of the extension rod 156 to deflect towards the side closer to the protective cover 13. The upward movement of the extension rod 156 forces the fan-shaped blades 15 to flip downward around the hinge axis. All the fan-shaped blades 15 flip downward and retract synchronously, forming a cone with the tip pointing downward.

[0036] When the drive cylinder 141 drives the lifting ring 142 to move downward, the lifting ring 142 drives the connecting rod 144 to move closer to the axis. The connecting rod 144 presses down on the extension rod 156, and the downward movement of the extension rod 156 forces the fan-shaped blades 15 to flip and unfold upward around the hinge axis. All the fan-shaped blades 15 flip and unfold upward simultaneously, forming an inverted conical cover with the tip pointing upward.

[0037] As an optional embodiment, refer to Figure 9 A method for removing and pouring sediment during the construction of a diaphragm wall, applied to the sediment removal and pouring device in the diaphragm wall construction of Example 1, includes: S1. Flip the fan-shaped blade 15 downwards to form a cone with the tip pointing downwards, and lower the device to the bottom of the trough along the guide wall in the folded state.

[0038] In this embodiment, in the retracted state, the drive cylinder 141 drives the lifting ring 142 to move upward to its upper limit position. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle part of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the upward movement of the extension rod 156 will force the fan-shaped blade 15 to rotate downward around the hinge axis. The device is then lowered to the bottom of the tank along the guide wall in the retracted state.

[0039] During the lowering process, high-pressure water jets are sprayed onto the tips of the fan-shaped blades 15 through flushing holes 155 on the outer surface of the blades 15. The high-pressure water jets are transported from a ground-based high-pressure water pump through microchannels inside the fan-shaped blades 15 to the flushing holes 155. The high-pressure water jets are then ejected at high speed from the flushing holes 155, directly impacting the soil layer in front of the tips of the fan-shaped blades 15. For dense sand and hard soil layers, the high-pressure water jets assist in cutting and washing away soil debris, preventing the tips of the fan-shaped blades 15 from being blocked by hard soil, ensuring the device can be smoothly lowered to the bottom of the tank, and ensuring that the subsequent inverted conical cover can completely cover the sediment layer at the bottom of the tank.

[0040] S2. Drive the lifting ring 142 down to the lower limit position. The angle between the connecting rod 144 and the extension rod 156 changes, causing the fan-shaped blade 15 to flip upward and unfold, forming an inverted cone-shaped cover with the tip pointing upward. The inverted cone-shaped cover covers the sediment at the bottom of the tank in the space inside the cover, preventing the sediment from escaping to the edge of the bottom of the tank laterally during the subsequent negative pressure suction process.

[0041] In this embodiment, as the device approaches the bottom, the inverted conical cover unfolds. A hydraulic pump station supplies pressure to the drive cylinder 141, causing the lifting ring 142 to descend slowly. The lifting ring 142 drives the connecting rod 144 downwards, which in turn pushes the extension rod 156 downwards. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the downward movement of the extension rod 156 forces the fan-shaped blade 15 to rotate upwards around the hinge axis.

[0042] Each fan-shaped blade 15 is arranged in a stacked manner, with the inner end of each fan-shaped blade 15 covering the inner end of the adjacent fan-shaped blade 15, and the outer end of each fan-shaped blade 15 being covered by the outer end of another adjacent fan-shaped blade 15. Therefore, the surface of the inverted cone-shaped cover is continuous and seamless, and any downward gaps are covered by the upper fan-shaped blades 15, preventing sediment from leaking out from the gaps between the fan-shaped blades 15.

[0043] After the inverted conical cover is fully deployed, low-pressure gas is introduced into the expansion auxiliary cavity within the sealing strip 152 on one side edge of the fan-shaped blade 15 through the annular space. Under the action of gas pressure, the sealing strip 152 expands outward and tightly embeds into the sealing groove 153 on the opposite edge of the adjacent fan-shaped blade 15. The arrow-shaped cross-section of the sealing strip 152 and the dovetail-shaped cross-section of the sealing groove 153 form an interlocking structure, realizing active forced sealing between the fan-shaped blades 15, further preventing sediment from escaping laterally from the gaps between the fan-shaped blades 15.

[0044] Once the inverted conical cover is fully deployed, the control device continues to descend to the bottom of the tank. The inverted conical cover completely encloses the sediment at the bottom of the tank within the cover's interior space. The conical spikes 151 along the edge of the fan-shaped blades 15 pierce into the sediment at the bottom of the tank.

[0045] S3. A negative pressure is formed by connecting the vacuum system through the inner tube 11, and the sediment in the inverted cone hood is sucked to the ground for separation. During the suction process, the inverted cone hood remains in the unfolded state.

[0046] In this embodiment, after the inverted conical hood is deployed and sealed, a negative pressure slag discharge operation is performed. The ground vacuum pump is connected to the inner pipe 11. The vacuum pump is started, creating negative pressure in the inner pipe 11. The negative pressure is transmitted to the space above the fan-shaped blades 15. Because the inverted conical hood traps the slag inside, the negative pressure area is confined to the space inside the hood. The physical barrier effect of the inverted conical hood restricts the movement range of the slag, ensuring that the slag can only be sucked into the inner pipe 11 and cannot escape laterally towards the bottom edge of the tank.

[0047] S4. Quick-setting material is injected into the bottom of the tank through the slurry storage hole 154, and then it is allowed to harden to form an artificial hard bottom.

[0048] In this embodiment, after slag removal is completed, the vacuum pump is stopped, and a bottom curing operation is performed. The slurry storage hole 154 is a shallow groove structure formed on the inner surface of the fan-shaped blade 15, and the inner wall of the slurry storage hole 154 is coated with a release agent. The quick-setting material sprayed through the slurry storage hole 154 accumulates and covers the bottom surface of the groove, forming a thin layer. The quick-setting material hardens to form an artificial hard bottom. This artificial hard bottom remains at the bottom of the groove after the inverted conical cover is removed, sealing off any possible escape paths for the sediment and providing a solid, flat base for subsequent concrete pouring.

[0049] S5. The device moves along the bottom of the tank to suck out the sediment from the bottom of the tank in sequence.

[0050] In this embodiment, after cleaning and solidification at one location are completed, a moving cleaning operation is performed. While keeping the inverted conical cover in its deployed state, the device is moved horizontally along the bottom of the tank a certain distance using a lifting device. The moving distance is less than the diameter of the inverted conical cover, ensuring that there is overlap between adjacent cleaning areas.

[0051] Once in place, repeat steps S3 and S4 to remove and solidify the sediment at the bottom of the new tank. By moving the device sequentially, the entire tank bottom area is covered section by section, ensuring that sediment is removed from all areas and an artificial hard bottom is formed. During the movement, the inverted cone-shaped cover remains deployed, preventing disturbance to the edges of the cleaned areas and ensuring the formation of the artificial hard bottom.

[0052] S6. Concrete is poured through the outer pipe 10, and the inverted cone cover remains in an extended state during the pouring process.

[0053] In this embodiment, after the entire bottom of the tank is cleaned and solidified, the fan-shaped blades 15 are controlled to retract into a cone shape with the tip pointing downwards. The concrete pump truck is started, and after the concrete flows out from the lower end of the outer pipe 10, it first enters the inner cavity of the upper cover 121 of the release cover 12. The upper cover 121 is a cone shape that is larger at the top and smaller at the bottom, and the concrete gathers in the inner cavity of the upper cover 121. Then the concrete flows downwards from the annular gap between the upper cover 121 and the lower cover 122. The lower cover 122 is a cone shape that is smaller at the top and larger at the bottom, and its direction is opposite to that of the cone shape of the upper cover 121. This oppositely arranged cone structure causes the concrete to diffuse for the first time during the flow process.

[0054] When concrete flows through the inner spiral strips 126 protruding from the inner surface of the lower cover 122, its flow direction is forcibly changed, resulting in swirling flow. Simultaneously, when the concrete flows through the outer spiral strips 131 on the outer surface of the top of the protective cover 13, its direction is again forcibly changed. The inner spiral strips 126 and the outer spiral strips 131 have opposite spiral directions; their combined action creates a complex turbulent mixing effect before the concrete flows out, ensuring uniform concrete distribution.

[0055] Finally, the concrete flows out from the gap between the bottom of the lower cover 122 and the top of the protective cover 13, and from the grout outlet 123 of the upper cover 121, evenly distributing on the outer surface of the fan-shaped blades 15. Throughout the concrete pouring process, the inverted conical cover remains in an extended state, reducing the impact force of the concrete on the bottom of the trench. Due to the presence of the inverted conical cover, the concrete flowing over the outer surface of the fan-shaped blades 15 is confined to the space above the fan-shaped blades 15, preventing it from directly impacting the bottom of the trench. The already cleaned and cured artificial hard bottom remains intact, and no new sediment will be stirred up by the concrete. At the same time, the physical barrier effect of the inverted conical cover prevents residual sediment from being pushed to the side of the wall or trapped at the corners during the filling process.

[0056] S7. Drive the lifting ring 142 to rise, causing the fan-shaped blade 15 to flip downward and retract into a cone with the tip pointing downward, pulling the entire device out of the slot.

[0057] In this embodiment, when the concrete has solidified after pouring, pressure is released through the annular space into the expansion auxiliary cavity within the sealing strip 152 on one edge of the fan-shaped blade 15. The sealing strip 152 retracts due to its own elasticity, exiting from the sealing groove 153 and releasing the seal between the fan-shaped blades 15. Then, the drive cylinder 141 drives the lifting ring 142 to rise. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. The upward movement of the extension rod 156 forces the fan-shaped blades 15 to rotate downward around the hinge axis. All the fan-shaped blades 15 together form a cone with the tip pointing downward.

[0058] After the device is pulled out, the sediment removal, bottom curing, and concrete pouring operations for one section are completed. The pulled-out compression disc is cleaned on the ground to remove any residual concrete and mud. After checking the condition of each component, it can be reused for the construction of the next section.

[0059] As an optional embodiment, this application also provides a computer device, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to perform the following steps: S1. Flip the fan-shaped blade 15 downwards to form a cone with the tip pointing downwards, and lower the device to the bottom of the trough along the guide wall in the folded state.

[0060] In this embodiment, in the retracted state, the drive cylinder 141 drives the lifting ring 142 to move upward to its upper limit position. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle part of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the upward movement of the extension rod 156 will force the fan-shaped blade 15 to rotate downward around the hinge axis. The device is then lowered to the bottom of the tank along the guide wall in the retracted state.

[0061] During the lowering process, high-pressure water jets are sprayed onto the tips of the fan-shaped blades 15 through flushing holes 155 on the outer surface of the blades 15. The high-pressure water jets are transported from a ground-based high-pressure water pump through microchannels inside the fan-shaped blades 15 to the flushing holes 155. The high-pressure water jets are then ejected at high speed from the flushing holes 155, directly impacting the soil layer in front of the tips of the fan-shaped blades 15. For dense sand and hard soil layers, the high-pressure water jets assist in cutting and washing away soil debris, preventing the tips of the fan-shaped blades 15 from being blocked by hard soil, ensuring the device can be smoothly lowered to the bottom of the tank, and ensuring that the subsequent inverted conical cover can completely cover the sediment layer at the bottom of the tank.

[0062] S2. Drive the lifting ring 142 down to the lower limit position. The angle between the connecting rod 144 and the extension rod 156 changes, causing the fan-shaped blade 15 to flip upward and unfold, forming an inverted cone-shaped cover with the tip pointing upward. The inverted cone-shaped cover covers the sediment at the bottom of the tank in the space inside the cover, preventing the sediment from escaping to the edge of the bottom of the tank laterally during the subsequent negative pressure suction process.

[0063] In this embodiment, as the device approaches the bottom, the inverted conical cover unfolds. A hydraulic pump station supplies pressure to the drive cylinder 141, causing the lifting ring 142 to descend slowly. The lifting ring 142 drives the connecting rod 144 downwards, which in turn pushes the extension rod 156 downwards. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the downward movement of the extension rod 156 forces the fan-shaped blade 15 to rotate upwards around the hinge axis.

[0064] Each fan-shaped blade 15 is arranged in a stacked manner, with the inner end of each fan-shaped blade 15 covering the inner end of the adjacent fan-shaped blade 15, and the outer end of each fan-shaped blade 15 being covered by the outer end of another adjacent fan-shaped blade 15. Therefore, the surface of the inverted cone-shaped cover is continuous and seamless, and any downward gaps are covered by the upper fan-shaped blades 15, preventing sediment from leaking out from the gaps between the fan-shaped blades 15.

[0065] After the inverted conical cover is fully deployed, low-pressure gas is introduced into the expansion auxiliary cavity within the sealing strip 152 on one side edge of the fan-shaped blade 15 through the annular space. Under the action of gas pressure, the sealing strip 152 expands outward and tightly embeds into the sealing groove 153 on the opposite edge of the adjacent fan-shaped blade 15. The arrow-shaped cross-section of the sealing strip 152 and the dovetail-shaped cross-section of the sealing groove 153 form an interlocking structure, realizing active forced sealing between the fan-shaped blades 15, further preventing sediment from escaping laterally from the gaps between the fan-shaped blades 15.

[0066] Once the inverted conical cover is fully deployed, the control device continues to descend to the bottom of the tank. The inverted conical cover completely encloses the sediment at the bottom of the tank within the cover's interior space. The conical spikes 151 along the edge of the fan-shaped blades 15 pierce into the sediment at the bottom of the tank.

[0067] S3. A negative pressure is formed by connecting the vacuum system through the inner tube 11, and the sediment in the inverted cone hood is sucked to the ground for separation. During the suction process, the inverted cone hood remains in the unfolded state.

[0068] In this embodiment, after the inverted conical hood is deployed and sealed, a negative pressure slag discharge operation is performed. The ground vacuum pump is connected to the inner pipe 11. The vacuum pump is started, creating negative pressure in the inner pipe 11. The negative pressure is transmitted to the space above the fan-shaped blades 15. Because the inverted conical hood traps the slag inside, the negative pressure area is confined to the space inside the hood. The physical barrier effect of the inverted conical hood restricts the movement range of the slag, ensuring that the slag can only be sucked into the inner pipe 11 and cannot escape laterally towards the bottom edge of the tank.

[0069] S4. Quick-setting material is injected into the bottom of the tank through the slurry storage hole 154, and then it is allowed to harden to form an artificial hard bottom.

[0070] In this embodiment, after slag removal is completed, the vacuum pump is stopped, and a bottom curing operation is performed. The slurry storage hole 154 is a shallow groove structure formed on the inner surface of the fan-shaped blade 15, and the inner wall of the slurry storage hole 154 is coated with a release agent. The quick-setting material sprayed through the slurry storage hole 154 accumulates and covers the bottom surface of the groove, forming a thin layer. The quick-setting material hardens to form an artificial hard bottom. This artificial hard bottom remains at the bottom of the groove after the inverted conical cover is removed, sealing off any possible escape paths for the sediment and providing a solid, flat base for subsequent concrete pouring.

[0071] S5. The device moves along the bottom of the tank to suck out the sediment from the bottom of the tank in sequence.

[0072] In this embodiment, after cleaning and solidification at one location are completed, a moving cleaning operation is performed. While keeping the inverted conical cover in its deployed state, the device is moved horizontally along the bottom of the tank a certain distance using a lifting device. The moving distance is less than the diameter of the inverted conical cover, ensuring that there is overlap between adjacent cleaning areas.

[0073] Once in place, repeat steps S3 and S4 to remove and solidify the sediment at the bottom of the new tank. By moving the device sequentially, the entire tank bottom area is covered section by section, ensuring that sediment is removed from all areas and an artificial hard bottom is formed. During the movement, the inverted cone-shaped cover remains deployed, preventing disturbance to the edges of the cleaned areas and ensuring the formation of the artificial hard bottom.

[0074] S6. Concrete is poured through the outer pipe 10, and the inverted cone cover remains in an extended state during the pouring process.

[0075] In this embodiment, after the entire bottom of the tank is cleaned and solidified, the fan-shaped blades 15 are controlled to retract into a cone shape with the tip pointing downwards. The concrete pump truck is started, and after the concrete flows out from the lower end of the outer pipe 10, it first enters the inner cavity of the upper cover 121 of the release cover 12. The upper cover 121 is a cone shape that is larger at the top and smaller at the bottom, and the concrete gathers in the inner cavity of the upper cover 121. Then the concrete flows downwards from the annular gap between the upper cover 121 and the lower cover 122. The lower cover 122 is a cone shape that is smaller at the top and larger at the bottom, and its direction is opposite to that of the cone shape of the upper cover 121. This oppositely arranged cone structure causes the concrete to diffuse for the first time during the flow process.

[0076] When concrete flows through the inner spiral strips 126 protruding from the inner surface of the lower cover 122, its flow direction is forcibly changed, resulting in swirling flow. Simultaneously, when the concrete flows through the outer spiral strips 131 on the outer surface of the top of the protective cover 13, its direction is again forcibly changed. The inner spiral strips 126 and the outer spiral strips 131 have opposite spiral directions; their combined action creates a complex turbulent mixing effect before the concrete flows out, ensuring uniform concrete distribution.

[0077] Finally, the concrete flows out from the gap between the bottom of the lower cover 122 and the top of the protective cover 13, and from the grout outlet 123 of the upper cover 121, evenly distributing on the outer surface of the fan-shaped blades 15. Throughout the concrete pouring process, the inverted conical cover remains in an extended state, reducing the impact force of the concrete on the bottom of the trench. Due to the presence of the inverted conical cover, the concrete flowing over the outer surface of the fan-shaped blades 15 is confined to the space above the fan-shaped blades 15, preventing it from directly impacting the bottom of the trench. The already cleaned and cured artificial hard bottom remains intact, and no new sediment will be stirred up by the concrete. At the same time, the physical barrier effect of the inverted conical cover prevents residual sediment from being pushed to the side of the wall or trapped at the corners during the filling process.

[0078] S7. Drive the lifting ring 142 to rise, causing the fan-shaped blade 15 to flip downward and retract into a cone with the tip pointing downward, pulling the entire device out of the slot.

[0079] In this embodiment, when the concrete has solidified after pouring, pressure is released through the annular space into the expansion auxiliary cavity within the sealing strip 152 on one edge of the fan-shaped blade 15. The sealing strip 152 retracts due to its own elasticity, exiting from the sealing groove 153 and releasing the seal between the fan-shaped blades 15. Then, the drive cylinder 141 drives the lifting ring 142 to rise. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. The upward movement of the extension rod 156 forces the fan-shaped blades 15 to rotate downward around the hinge axis. All the fan-shaped blades 15 together form a cone with the tip pointing downward.

[0080] After the device is pulled out, the sediment removal, bottom curing, and concrete pouring operations for one section are completed. The pulled-out compression disc is cleaned on the ground to remove any residual concrete and mud. After checking the condition of each component, it can be reused for the construction of the next section.

[0081] As an optional embodiment, this application also provides a computer-readable storage medium having a computer program stored thereon, wherein the processor executes the computer program to perform the following steps: S1. Flip the fan-shaped blade 15 downwards to form a cone with the tip pointing downwards, and lower the device to the bottom of the trough along the guide wall in the folded state.

[0082] In this embodiment, in the retracted state, the drive cylinder 141 drives the lifting ring 142 to move upward to its upper limit position. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle part of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the upward movement of the extension rod 156 will force the fan-shaped blade 15 to rotate downward around the hinge axis. The device is then lowered to the bottom of the tank along the guide wall in the retracted state.

[0083] During the lowering process, high-pressure water jets are sprayed onto the tips of the fan-shaped blades 15 through flushing holes 155 on the outer surface of the blades 15. The high-pressure water jets are transported from a ground-based high-pressure water pump through microchannels inside the fan-shaped blades 15 to the flushing holes 155. The high-pressure water jets are then ejected at high speed from the flushing holes 155, directly impacting the soil layer in front of the tips of the fan-shaped blades 15. For dense sand and hard soil layers, the high-pressure water jets assist in cutting and washing away soil debris, preventing the tips of the fan-shaped blades 15 from being blocked by hard soil, ensuring the device can be smoothly lowered to the bottom of the tank, and ensuring that the subsequent inverted conical cover can completely cover the sediment layer at the bottom of the tank.

[0084] S2. Drive the lifting ring 142 down to the lower limit position. The angle between the connecting rod 144 and the extension rod 156 changes, causing the fan-shaped blade 15 to flip upward and unfold, forming an inverted cone-shaped cover with the tip pointing upward. The inverted cone-shaped cover covers the sediment at the bottom of the tank in the space inside the cover, preventing the sediment from escaping to the edge of the bottom of the tank laterally during the subsequent negative pressure suction process.

[0085] In this embodiment, as the device approaches the bottom, the inverted conical cover unfolds. A hydraulic pump station supplies pressure to the drive cylinder 141, causing the lifting ring 142 to descend slowly. The lifting ring 142 drives the connecting rod 144 downwards, which in turn pushes the extension rod 156 downwards. Since the extension rod 156 is fixedly connected to the fan-shaped blade 15, and the middle of the fan-shaped blade 15 is hinged to the bottom edge of the protective cover 13, the downward movement of the extension rod 156 forces the fan-shaped blade 15 to rotate upwards around the hinge axis.

[0086] Each fan-shaped blade 15 is arranged in a stacked manner, with the inner end of each fan-shaped blade 15 covering the inner end of the adjacent fan-shaped blade 15, and the outer end of each fan-shaped blade 15 being covered by the outer end of another adjacent fan-shaped blade 15. Therefore, the surface of the inverted cone-shaped cover is continuous and seamless, and any downward gaps are covered by the upper fan-shaped blades 15, preventing sediment from leaking out from the gaps between the fan-shaped blades 15.

[0087] After the inverted conical cover is fully deployed, low-pressure gas is introduced into the expansion auxiliary cavity within the sealing strip 152 on one side edge of the fan-shaped blade 15 through the annular space. Under the action of gas pressure, the sealing strip 152 expands outward and tightly embeds into the sealing groove 153 on the opposite edge of the adjacent fan-shaped blade 15. The arrow-shaped cross-section of the sealing strip 152 and the dovetail-shaped cross-section of the sealing groove 153 form an interlocking structure, realizing active forced sealing between the fan-shaped blades 15, further preventing sediment from escaping laterally from the gaps between the fan-shaped blades 15.

[0088] Once the inverted conical cover is fully deployed, the control device continues to descend to the bottom of the tank. The inverted conical cover completely encloses the sediment at the bottom of the tank within the cover's interior space. The conical spikes 151 along the edge of the fan-shaped blades 15 pierce into the sediment at the bottom of the tank.

[0089] S3. A negative pressure is formed by connecting the vacuum system through the inner tube 11, and the sediment in the inverted cone hood is sucked to the ground for separation. During the suction process, the inverted cone hood remains in the unfolded state.

[0090] In this embodiment, after the inverted conical hood is deployed and sealed, a negative pressure slag discharge operation is performed. The ground vacuum pump is connected to the inner pipe 11. The vacuum pump is started, creating negative pressure in the inner pipe 11. The negative pressure is transmitted to the space above the fan-shaped blades 15. Because the inverted conical hood traps the slag inside, the negative pressure area is confined to the space inside the hood. The physical barrier effect of the inverted conical hood restricts the movement range of the slag, ensuring that the slag can only be sucked into the inner pipe 11 and cannot escape laterally towards the bottom edge of the tank.

[0091] S4. Quick-setting material is injected into the bottom of the tank through the slurry storage hole 154, and then it is allowed to harden to form an artificial hard bottom.

[0092] In this embodiment, after slag removal is completed, the vacuum pump is stopped, and a bottom curing operation is performed. The slurry storage hole 154 is a shallow groove structure formed on the inner surface of the fan-shaped blade 15, and the inner wall of the slurry storage hole 154 is coated with a release agent. The quick-setting material sprayed through the slurry storage hole 154 accumulates and covers the bottom surface of the groove, forming a thin layer. The quick-setting material hardens to form an artificial hard bottom. This artificial hard bottom remains at the bottom of the groove after the inverted conical cover is removed, sealing off any possible escape paths for the sediment and providing a solid, flat base for subsequent concrete pouring.

[0093] S5. The device moves along the bottom of the tank to suck out the sediment from the bottom of the tank in sequence.

[0094] In this embodiment, after cleaning and solidification at one location are completed, a moving cleaning operation is performed. While keeping the inverted conical cover in its deployed state, the device is moved horizontally along the bottom of the tank a certain distance using a lifting device. The moving distance is less than the diameter of the inverted conical cover, ensuring that there is overlap between adjacent cleaning areas.

[0095] Once in place, repeat steps S3 and S4 to remove and solidify the sediment at the bottom of the new tank. By moving the device sequentially, the entire tank bottom area is covered section by section, ensuring that sediment is removed from all areas and an artificial hard bottom is formed. During the movement, the inverted cone-shaped cover remains deployed, preventing disturbance to the edges of the cleaned areas and ensuring the formation of the artificial hard bottom.

[0096] S6. Concrete is poured through the outer pipe 10, and the inverted cone cover remains in an extended state during the pouring process.

[0097] In this embodiment, after the entire bottom of the tank is cleaned and solidified, the fan-shaped blades 15 are controlled to retract into a cone shape with the tip pointing downwards. The concrete pump truck is started, and after the concrete flows out from the lower end of the outer pipe 10, it first enters the inner cavity of the upper cover 121 of the release cover 12. The upper cover 121 is a cone shape that is larger at the top and smaller at the bottom, and the concrete gathers in the inner cavity of the upper cover 121. Then the concrete flows downwards from the annular gap between the upper cover 121 and the lower cover 122. The lower cover 122 is a cone shape that is smaller at the top and larger at the bottom, and its direction is opposite to that of the cone shape of the upper cover 121. This oppositely arranged cone structure causes the concrete to diffuse for the first time during the flow process.

[0098] When concrete flows through the inner spiral strips 126 protruding from the inner surface of the lower cover 122, its flow direction is forcibly changed, resulting in swirling flow. Simultaneously, when the concrete flows through the outer spiral strips 131 on the outer surface of the top of the protective cover 13, its direction is again forcibly changed. The inner spiral strips 126 and the outer spiral strips 131 have opposite spiral directions; their combined action creates a complex turbulent mixing effect before the concrete flows out, ensuring uniform concrete distribution.

[0099] Finally, the concrete flows out from the gap between the bottom of the lower cover 122 and the top of the protective cover 13, and from the grout outlet 123 of the upper cover 121, evenly distributing on the outer surface of the fan-shaped blades 15. Throughout the concrete pouring process, the inverted conical cover remains in an extended state, reducing the impact force of the concrete on the bottom of the trench. Due to the presence of the inverted conical cover, the concrete flowing over the outer surface of the fan-shaped blades 15 is confined to the space above the fan-shaped blades 15, preventing it from directly impacting the bottom of the trench. The already cleaned and cured artificial hard bottom remains intact, and no new sediment will be stirred up by the concrete. At the same time, the physical barrier effect of the inverted conical cover prevents residual sediment from being pushed to the side of the wall or trapped at the corners during the filling process.

[0100] S7. Drive the lifting ring 142 to rise, causing the fan-shaped blade 15 to flip downward and retract into a cone with the tip pointing downward, pulling the entire device out of the slot.

[0101] In this embodiment, when the concrete has solidified after pouring, pressure is released through the annular space into the expansion auxiliary cavity within the sealing strip 152 on one edge of the fan-shaped blade 15. The sealing strip 152 retracts due to its own elasticity, exiting from the sealing groove 153 and releasing the seal between the fan-shaped blades 15. Then, the drive cylinder 141 drives the lifting ring 142 to rise. The lifting ring 142 drives the connecting rod 144 to move upward, and the connecting rod 144 pulls the extension rod 156 upward. The upward movement of the extension rod 156 forces the fan-shaped blades 15 to rotate downward around the hinge axis. All the fan-shaped blades 15 together form a cone with the tip pointing downward.

[0102] After the device is pulled out, the sediment removal, bottom curing, and concrete pouring operations for one section are completed. The pulled-out compression disc is cleaned on the ground to remove any residual concrete and mud. After checking the condition of each component, it can be reused for the construction of the next section.

[0103] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A device for removing sediment and pouring concrete during the construction of a diaphragm wall, characterized in that, It includes an outer pipe (10) and an inner pipe (11), the bottom end of the inner pipe (11) is lower than the bottom end of the outer pipe (10), the inner pipe (11) is nested inside the outer pipe (10) for sucking up sediment or injecting thixotropic mud, and the annular space between the outer pipe (10) and the inner pipe (11) is used for conveying concrete. A protective cover (13) is provided on the outer side of the bottom end of the inner tube (11). Multiple fan-shaped blades (15) are rotatably arranged on the bottom edge of the protective cover (13). When the multiple fan-shaped blades (15) are folded, they form a cone with the tip pointing downwards to facilitate lowering and pulling out. When the multiple fan-shaped blades (15) are unfolded, they form an inverted cone-shaped cover with the tip pointing upwards. The inverted cone-shaped cover is used to cover the sediment at the bottom of the tank in the space inside the cover to prevent the sediment from escaping to the side of the bottom edge of the tank during the negative pressure suction process. A drive assembly (14) is disposed inside the protective cover (13) and is used to drive the multiple fan-shaped blades (15) to retract or expand.

2. The slag removal and pouring device for diaphragm wall construction according to claim 1, characterized in that: The drive assembly (14) includes a drive cylinder (141), a lifting ring (142), a sliding rail (143), and a connecting rod (144); The driving cylinder (141) and the lifting ring (142) are disposed between the protective cover (13) and the inner tube (11). The top surface of the lifting ring (142) is fixedly connected to the piston rod of the driving cylinder (141). The side surface of the lifting ring (142) is sealed and abutted against the inner wall of the protective cover (13) and the outer wall of the inner tube (11) respectively. The driving cylinder (141) drives the lifting ring (142) to slide along the axial direction of the inner tube (11). The sliding track (143) is disposed on the bottom surface of the lifting ring (142) and distributed radially. The top end of the connecting rod (144) is slidably disposed on the sliding track (143). The top end of the fan-shaped blade (15) is fixedly disposed with an extension rod (156). The end of the extension rod (156) is hinged to the bottom end of the connecting rod (144).

3. The slag removal and pouring device for diaphragm wall construction according to claim 2, characterized in that: A sealing strip (152) is provided on one side edge of the fan-shaped blade (15), and a sealing groove (153) is provided on the opposite edge of the adjacent fan-shaped blade (15). A pressurizable expansion auxiliary cavity is provided inside the sealing strip (152). After the inverted conical cover is fully unfolded, the sealing strip (152) expands and embeds into the sealing groove (153).

4. The slag removal and pouring device for diaphragm wall construction according to claim 3, characterized in that: The inner surface of the fan-shaped blade (15) is provided with a slurry storage hole (154), and the inner wall of the slurry storage hole (154) is coated with a release agent. The slurry storage hole (154) is used to transport the quick-setting material into the space inside the cover and form an artificial hard bottom after hardening.

5. The slag removal and pouring device for diaphragm wall construction according to claim 4, characterized in that: The outer surface of the fan-shaped blade (15) is provided with a flushing hole (155). The flushing hole (155) is connected to an external facility to spray high-pressure water flow to assist in penetrating the hard soil layer at the bottom of the tank when the device is lowered and to ensure that the inverted cone cover completely covers the sediment layer at the bottom of the tank.

6. The slag removal and pouring device for diaphragm wall construction according to claim 5, characterized in that: The bottom end of the outer tube (10) is provided with a release cover (12), which covers the outside of the inner tube (11). The release cover (12) includes an upper cover (121) and a lower cover (122). The diameter of the top end of the upper cover (121) is larger than the diameter of the bottom end. The top end of the upper cover (121) is connected to the bottom end of the outer tube (10). A slurry outlet (123) is opened on the side of the top end of the upper cover (121). The diameter of the top end of the lower cover (122) is smaller than the diameter of the bottom end. The bottom end of the upper cover (121) is connected to the top end of the lower cover (122).

7. The slag removal and pouring device for diaphragm wall construction according to claim 6, characterized in that: The inner surface of the fan-shaped blade (15) is provided with a conical spike (151), which extends out and pierces the sediment layer when the inverted conical cover is unfolded.

8. A method for using a sediment removal and pouring device in the construction of a diaphragm wall as described in claim 7, characterized in that, include: S1. Flip the fan-shaped blade (15) downwards to form a cone with the tip pointing downwards, and lower the device to the bottom of the trough along the guide wall in the folded state. S2. Drive the lifting ring (142) down to the lower limit position. By changing the angle between the connecting rod (144) and the extension rod (156), the fan-shaped blade (15) flips up and unfolds to form an inverted cone-shaped cover with the tip pointing upward. The inverted cone-shaped cover covers the sediment at the bottom of the tank in the space inside the cover. S3. A negative pressure is formed by connecting the vacuum system through the inner tube (11) to draw the sediment in the inverted cone hood to the ground for separation. During the suction process, the inverted cone hood is kept in an unfolded state to limit the movement range of the sediment. S4. Inject quick-setting material into the bottom of the tank through the slurry storage hole (154) and wait for it to harden to form an artificial hard bottom; S5. The device moves along the bottom of the tank to suck out the sediment from the bottom of the tank in sequence; S6. Concrete is poured through the outer pipe (10), and the inverted cone cover remains in an unfolded state during the pouring process; S7. Drive the lifting ring (142) to rise, so that the fan-shaped blade (15) flips down and retracts into a cone with the tip pointing downward, and pulls the entire device out of the slot.

9. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method of claim 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method described in claim 8.

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