Soil treatment device with combination of vibroflot and drainage plate and construction method

Abstract

The invention discloses a vibroflot and drainage plate combined soil treatment device and a construction method, the vibroflot and drainage plate combined soil treatment device comprises a vibroflot, the vibroflot is located right above a treatment area with a hard stratum and a soft stratum, in the treatment area, the vibroflot forms a hole and sinks, firstly penetrates through the hard stratum, and then sinks into the soft stratum until the designed depth is reached; one end of the drainage plate is located on the ground, the other end of the drainage plate synchronously sinks to the designed depth along with the vibroflot, the vibroflot is lifted to move relative to the drainage plate, the soft soil layer backfilling holes enable the end, sinking along with the vibroflot, of the drainage plate to be reserved in the soft soil layer, and the vibroflot stops working or continues working in the lifting process to compact the soil layer section by section. According to the construction method, two working procedures are combined into a whole, under the condition of the ultra-deep and ultra-hard stratum, the vibroflotation compaction of the foundation and the construction of the drainage plate can be synchronously completed only through vibroflotation, the overall work efficiency is remarkably improved, the vibroflotation compaction and the drainage plate are synchronously constructed, and therefore the total construction period is greatly shortened, cost is reduced, and efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of soil remediation technology, specifically to a soil remediation device and construction method that combines a vibratory compactor and a drainage board. Background Technology

[0002] As the scale of engineering construction grows larger and engineering geological conditions become increasingly complex, soft soil foundation treatment faces more complex and variable situations. In addition, the foundation overburden is relatively thick, and traditional plastic drainage board equipment and construction technology are gradually becoming unable to meet the treatment needs under complex geological conditions.

[0003] Currently used excavator-modified leaf springs and tracked leaf springs are difficult to effectively penetrate hard strata (backfill sand layers) to soft strata (silt layers). Therefore, in actual construction, it is often necessary to first use specialized equipment to penetrate the hard strata before installing drainage boards, with the process being carried out in two steps, resulting in low overall construction efficiency. In addition, in some surcharge preloading projects, the traditional process requires the installation of drainage boards first, followed by approximately 4 to 7 months (depending on the thickness of the weak underlying layer and design requirements) of preloading consolidation. Only after the settlement has stabilized and meets the design requirements can vibratory compaction construction be carried out. This long surcharge preloading waiting period leads to an extension of the overall construction period and an increase in construction costs. Summary of the Invention

[0004] The purpose of this invention is to provide a soil remediation device and construction method that combines a vibratory compactor and a drainage board. This invention combines two processes into one. Under ultra-deep and ultra-hard strata conditions, the vibratory compaction of the foundation and the construction of the drainage board can be completed simultaneously by relying solely on vibratory compaction. This optimizes the construction organization, significantly improves the overall work efficiency, and eliminates the long waiting period for surcharge preloading when vibratory compaction and drainage board construction are carried out simultaneously, thereby greatly shortening the total construction period and reducing costs while increasing efficiency.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution: A soil remediation device combining a vibratory compactor and a drainage board, comprising: The vibratory compactor is located directly above the treatment area, which has both hard and soft soil layers. Within the treatment area, the vibratory compactor creates a hole and sinks down, first penetrating the hard soil layer, and then sinking into the soft soil layer until it reaches the designed depth. The drainage board has one end on the ground and the other end sinking to the design depth synchronously with the vibratory compactor. When the vibratory compactor is lifted, it moves relative to the drainage board. The soft soil backfill hole allows the end of the drainage board that sank with the vibratory compactor to remain in the soft soil layer. During the lifting process of the vibratory compactor, the work can be stopped or continued to compact the soil layer section by section.

[0006] In this scheme, the vibratory compactor is positioned directly above the treatment area where hard and soft soil layers alternate. When the vibratory compactor is activated, it creates holes in the hard soil layer and sinks through high-frequency vibration and water jetting (usually). One end of the drainage board is on the ground, while the other end sinks synchronously with the vibratory compactor. Utilizing the vibratory compactor's powerful penetrating force, it overcomes the obstruction of the hard soil layer, creating a channel for the drainage board to reach the deep soft soil. The vibratory compactor carries the end of the drainage board, successfully penetrating the hard crust layer and entering and finally reaching the designed depth in the soft soil layer. The drainage board provides the shortest vertical drainage path for the soft soil. During subsequent foundation loading (such as backfilling and surcharge preloading), one end of the drainage board is deeply inserted into the soft soil layer, while the other end remains on the surface. Pore water in the soft soil can be quickly discharged through the drainage board, thereby greatly accelerating the consolidation and settlement process of the foundation, causing the soil to rapidly become denser and its strength to increase.

[0007] As the vibratory compactor begins to lift, relative movement occurs between it and the drainage board. The vibratory compactor moves upward, while the drainage board, due to friction with the surrounding soil or a special device, remains in place, its bottom firmly embedded in the soft soil layer. During the lifting process of the vibratory compactor, coarse-grained materials such as sand are backfilled into the hole.

[0008] Two working modes of the vibratory impactor: Mode 1 (Stop working): If the main purpose is to quickly form a drainage channel, the vibratory compactor can stop vibrating and be used only as a lifting conduit. The backfill material forms a vertical drainage sand well, which together with the drainage board constitutes a powerful drainage system.

[0009] Mode 2 (Continue Working): If further densification of the surrounding soil is required, the vibratory compactor continues to vibrate during the lifting process. Through the vibration and compression action, the surrounding soft clay and hard crust layers are compacted segment by segment.

[0010] Traditional drainage boards struggle to penetrate hard shell layers under ordinary static pressure plate inserters, or even if they do penetrate, the efficiency is extremely low and the equipment is easily damaged. This solution utilizes the powerful soil-breaking and penetrating capabilities of vibratory compactors to easily overcome the obstruction caused by hard shell layers, making drainage and reinforcement of deep soft soil possible. This accelerates the consolidation of soft soil foundations, significantly improves bearing capacity, avoids slow settlement over decades after construction, and allows buildings to be put into use faster and more safely.

[0011] If the "continue working" mode is adopted, a high-strength reinforcement is formed. Together with the surrounding compacted soil, it forms a composite foundation, directly transferring the upper load to a deeper and more solid soil layer. The overall bearing capacity is extremely high, improving foundation stability and preventing shear failure. Soft clay has low strength and is prone to lateral slippage or plastic failure under load. The drainage board accelerates consolidation and improves the shear strength of the soft soil itself.

[0012] This scheme combines two pipe fitting processes into one, completing drilling, penetrating the hard layer, and implanting the drainage board in a single sinking process under ultra-deep and ultra-hard strata conditions. Compared with the step-by-step construction method of drilling first, then inserting the board, and then making piles, this scheme has a compact process, which can effectively reduce the input of construction personnel and significantly shorten the construction period.

[0013] Optional, also includes: Guide rod, one end of which is connected to the lifting equipment, and the other end is connected to the vibratory compactor; The sleeve is fixed to the side wall of the guide rod, and the lower end of the sleeve extends to the side wall of the vibratory compactor. The sleeve has an installation cavity that allows the drainage plate to pass through. The sleeve is open at both ends, and the end of the drainage plate that sinks with the vibratory compactor is connected to a pile shoe that is closely attached to the bottom of the sleeve.

[0014] Optionally, the guide rod sidewall is provided with a movable guide member, and the drainage plate is placed on the guide member.

[0015] Optionally, the guide component is a roller, and a gate-shaped support frame is fixed on the side wall of the guide rod. The roller is rotatably mounted on the support frame. Baffles are provided on both sides of the roller, and a limiting rod is provided between the two baffles. The drainage plate is located inside the limiting rod.

[0016] Optionally, the upper end of the sleeve is provided with a flushing pipe, and the outlet end of the flushing pipe extends into the sleeve.

[0017] Optionally, the pile boot is a weight-increasing and thickened type of pile boot.

[0018] Optionally, the vibratory impactor is fitted with a shock-absorbing rubber pad located between the sleeve and the side wall of the vibratory impactor. The shock-absorbing rubber pad is located at the motor connection of the vibratory impactor and is fixed to the vibratory impactor by a hoop.

[0019] Optionally, the lifting equipment is a tracked pile driver, which is equipped with a winch. The winch is connected to the guide rod via a wire rope. A water tank, a water pump, and a generator are located at the rear of the lifting equipment. The generator supplies power to the motors of the water pump and the vibratory compactor. The water pump pumps water from the water tank to the flushing pipe and the vibratory compactor.

[0020] A construction method for soil remediation includes the following steps: S1: One end of the drainage board passes through the casing and extends to the outside of the casing to connect with the pile shoe. The other end of the drainage board is manually tied to make the pile shoe fit tightly against the bottom of the casing. S2: Turn on the vibratory compactor and water pump. The vibratory compactor is aimed at the treatment area to start drilling. The vibratory compactor pulls the drainage board down simultaneously, passing through the hard layer to reach the soft layer at the designed depth. At the same time as the vibratory compactor sinks, pressurized water is injected into the casing. S3: After the vibratory compactor drills to the designed depth, the water pressure injected into the casing is increased, and the vibratory compactor is lifted by the lifting equipment. Under the action of the water pressure in the pile shoe and the casing, the drainage board automatically sinks and remains in the soft soil layer. S4: After the vibratory compactor is completely lifted out of the soil layer, the drainage board is cut to complete the drainage board construction. The lifting equipment is then moved to the next treatment area, and the above steps are repeated to complete the drainage board construction in all treatment areas.

[0021] Optionally, after the vibratory compactor has sunk to the designed depth, if compaction is required, the vibratory compactor can be lifted up and compacted section by section until it reaches the ground, thus simultaneously completing the vibratory compaction and drainage board construction.

[0022] The beneficial effects of this invention are as follows: 1. In this invention, the powerful penetrating ability of the vibratory compactor is utilized to directly pull the drainage board through complex, ultra-hard strata to the designed depth. Under the action of the pile shoe and water pressure, it is successfully placed in the soft soil layer, completing the installation of the drainage board. If the treatment area requires vibratory compaction, the compaction is carried out segment by segment according to the requirements. This solution not only solves the problem of insufficient performance of conventional drainage board equipment when penetrating hard soil layers, but also achieves simultaneous vibratory compaction and drainage board laying.

[0023] 2. This invention combines two key processes into one. Under ultra-deep and ultra-hard strata conditions, only one vibratory compaction construction team is needed to simultaneously complete the vibratory compaction of the foundation and the installation of drainage boards, which optimizes the construction organization and significantly improves the overall work efficiency.

[0024] 3. In some surcharge preloading projects, the traditional method requires the installation of drainage boards and a 4-7 month preloading consolidation period before vibratory compaction can be carried out. This solution allows the simultaneous construction of vibratory compaction and drainage boards after backfilling and leveling, eliminating the long waiting period of surcharge preloading, thereby significantly shortening the total construction period and reducing costs and increasing efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure after the drainage board and pile shoe are assembled. Figure 3 This is a schematic diagram of the roller structure; Figure 4 This is a side view of the roller and guide rod. Figure 5 This is a schematic diagram showing the comparison between the sinking and lifting of the vibratory impactor.

[0026] Reference numerals: 1-roller, 101-baffle, 102-limiting rod, 2-flushing pipe, 3-guide rod, 4-sleeve, 5-drainage plate, 6-shock-absorbing pad, 7-pile shoe, 8-vibratory compactor, 9-hoop, 10-water tank, 11-water pump, 12-generator, 13-lifting equipment, 14-support frame, 15-hard stratum, 16-soft stratum. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0030] A soil remediation device combining a vibratory compactor and a drainage board, comprising: Vibratory impactor 8 is located directly above the treatment area with hard layer 15 and soft layer 16. Within the treatment area, vibratory impactor 8 makes holes and sinks down, first passing through hard layer 15, and then sinking into soft layer 16 until it reaches the designed depth. Drainage board 5, one end of which is located on the ground, and the other end sinks synchronously with vibratory compactor 8 to the designed depth. Vibratory compactor 8 is lifted and moves relative to drainage board 5. The soft soil backfill hole allows the end of drainage board 5 that sinks with vibratory compactor 8 to remain in the soft soil layer 16. During the lifting process of vibratory compactor 8, it stops working or continues to work to compact the soil layer section by section.

[0031] In this embodiment, as Figure 1 and Figure 5As shown, the vibratory compactor 8 is located directly above the treatment area where hard and soft soil layers alternate. When the vibratory compactor 8 is activated, it creates holes in the hard soil layer 15 and sinks through high-frequency vibration and water jetting (usually). This is the conventional function of the vibratory compactor 8. One end of the drainage board 5 is on the ground, and the other end sinks synchronously with the vibratory compactor 8. Utilizing the strong penetrating power of the vibratory compactor 8, it overcomes the obstruction of the hard soil layer 15, opening a channel for the drainage board 5 to reach the deep soft soil. The vibratory compactor 8 carries the end of the drainage board 5, successfully passing through the hard shell layer and entering and finally reaching the designed depth in the soft soil layer. The drainage board 5 provides the shortest vertical drainage path for the soft soil. During subsequent foundation loading (such as backfilling and surcharge preloading), the drainage board 5 acts like a "straw," with one end deeply inserted into the soft soil layer and the other end remaining on the surface. Pore water in the soft soil can be quickly discharged through the drainage board 5, thereby greatly accelerating the consolidation and settlement process of the foundation, making the soil rapidly denser and stronger.

[0032] like Figure 5 As shown, when the vibratory compactor 8 begins to lift, the vibratory compactor 8 and the drainage board 5 move relative to each other—the vibratory compactor 8 moves upward, while the drainage board 5, due to friction with the surrounding soil or a special device, remains in place, its bottom firmly embedded in the soft soil layer. During the lifting process of the vibratory compactor 8, coarse-grained materials such as sand are backfilled into the hole.

[0033] The two working modes of the vibratory impactor 8: Mode 1 (Stop working): If the main purpose is to quickly form a drainage channel, the vibratory compactor 8 can stop vibrating and be used only as a lifting conduit. The backfill material forms a vertical drainage sand well, which together with the drainage board 5 constitutes a powerful drainage system.

[0034] Mode 2 (Continue Working): If further densification of the surrounding soil is required, the vibratory compactor 8 continues to vibrate during the lifting process. Through the vibration and compression action, the surrounding soft clay and hard shell layers are compacted segment by segment.

[0035] Traditional drainage boards 5 struggle to penetrate hard shell layers under ordinary static pressure plate inserters, or even if they do penetrate, the efficiency is extremely low and the equipment is easily damaged. This solution utilizes the powerful soil-breaking and penetrating capabilities of the vibratory compactor 8 to easily solve the obstruction problem of hard shell layers, making drainage and reinforcement of deep soft soil possible, accelerating the consolidation of soft soil foundations, significantly improving bearing capacity, avoiding decades of slow settlement after construction, and enabling buildings to be put into use faster and more safely.

[0036] If the "continue working" mode is adopted, a high-strength reinforcement is formed. It together with the surrounding compacted soil to form a composite foundation, directly transferring the upper load to a deeper and more solid soil layer. The overall bearing capacity is extremely high, improving the stability of the foundation and preventing shear failure. Soft clay has low strength and is prone to lateral slippage or plastic failure under load. The drainage board 5 accelerates consolidation and improves the shear strength of the soft soil itself.

[0037] This scheme combines two pipe fitting processes into one, completing drilling, penetrating the hard layer, and implanting the drainage board in a single sinking process under ultra-deep and ultra-hard strata conditions. Compared with the step-by-step construction method of drilling first, then inserting the board, and then making piles, this scheme has a compact process, which can effectively reduce the input of construction personnel and significantly shorten the construction period.

[0038] Furthermore, it also includes: Guide rod 3, one end of which is connected to lifting equipment 13, and the other end is connected to vibratory impactor 8; The sleeve 4 is fixed to the side wall of the guide rod 3. The lower end of the sleeve 4 extends to the side wall of the vibratory compactor 8. The sleeve 4 has an installation cavity that allows the drainage plate 5 to pass through. The sleeve 4 is open at both ends. The end of the drainage plate 5 that sinks with the vibratory compactor 8 is connected to a pile shoe 7 that is closely attached to the bottom of the sleeve 4.

[0039] Specifically, such as Figure 2 As shown, the sleeve 4 is a pipe fitting that matches the shape of the plastic drainage board 5. It is welded to the side wall of the guide rod 3. The sleeve 4 is parallel to the axis of the guide rod 3. The sleeve 4 is open at both ends and has an installation cavity in the middle for the drainage board 5 to pass through. The drainage board 5 can move freely in the installation cavity. The lower end of the sleeve 4 extends to the side wall of the vibratory compactor 8. The end of the drainage board 5 passes through the sleeve 4 and is fixedly connected to the pile shoe 7. By manually pulling the end of the drainage board 5 on the ground, the pile shoe 7 and the bottom end of the sleeve 4 are tightly fitted to form a temporary sealing structure. This can prevent soil from entering the sleeve 4 and causing blockage as the drainage board 5 sinks with the vibratory compactor 8.

[0040] The upper end of the guide rod 3 is connected to the lifting equipment 13 (providing hoisting and pressure), and the lower end is connected to the vibratory impactor 8 (providing core power). The lifting equipment 13 lowers the guide rod 3, and the vibratory impactor 8 is activated, generating high-frequency vibration and impact, starting the hole drilling and sinking.

[0041] Because the drainage board 5 is tightly attached to the bottom of the casing 4 via the pile shoe 7, it is forced to move downwards synchronously as the entire system descends. The casing 4 acts as a guide and protector, ensuring that the drainage board 5 does not bend, fold, or get damaged when traversing complex strata. Utilizing the powerful penetrating force of the vibratory compactor 8, the system first penetrates the hard stratum 15 and then continues to descend to the soft stratum 16 until it reaches the design depth. At this point, the bottom of the drainage board 5 (along with the pile shoe 7) also reaches the design depth.

[0042] After drilling to the designed depth, the lifting equipment 13 begins to lift the guide rod 3, causing the vibratory impactor 8 and the sleeve 4 to rise together. During this process, the tight fit between the pile shoe 7 and the bottom of the casing 4 is released. Because the friction and adsorption forces between the pile shoe 7 and the surrounding soil (especially soft clay) are greater than the friction forces between it and the casing 4, the pile shoe 7, along with the drainage board 5 connected to it, remains in place. As the casing 4 is fully lifted, the drainage board 5 is precisely and vertically implanted into the soft soil layer, with its bottom fixed at the design depth. During the lifting process, materials such as sand can be backfilled into the hole. The vibratory compactor 8 can choose to continue working to compact the surrounding soil or stop working, only forming a drainage channel.

[0043] Furthermore, the guide rod 3 has a movable guide on its side wall, and the drainage plate 5 is mounted on the guide.

[0044] Furthermore, the guide component is a roller 1, and a gate-shaped support frame 14 is fixed on the side wall of the guide rod 3. The roller 1 is rotatably mounted on the support frame 14. Baffles 101 are provided on both sides of the roller 1, and a limiting rod 102 is provided between the two baffles 101. The drainage plate 5 is located inside the limiting rod 102.

[0045] Specifically, such as Figure 3 and Figure 4 As shown, a gantry-shaped support frame 14 is welded on the side wall of the guide rod 3. The support frame 14 is located above the sleeve 4 and has a certain distance from the upper end of the sleeve 4. The roller 1 is rotatably mounted on the upper end of the support frame 14. To prevent the roller 1 from moving axially, a bearing can be fixed on the crossbar at the upper end of the support frame 14. The roller 1 is sleeved on the bearing to enhance the flexibility of the roller 1's rotation.

[0046] When the vibratory impactor 8 drives the guide rod 3 to sink, or lifts the sleeve 4 to separate from the drainage plate 5, the drainage plate 5 needs to move downward or upward relative to the guide rod 3. The rotation of the roller 1 makes this movement extremely smooth.

[0047] The portal frame 14 provides a sturdy mounting point for the roller 1, located away from the guide rod 3. The portal structure creates sufficient space for the drainage plate 5 to transition naturally from the ground supply source to the vertical sleeve 4 with a slight curvature, avoiding sharp bends and angles. Figure 4As shown, after transitioning from roller 1, the drainage plate 5 enters the mounting cavity of sleeve 4 along the tangential direction of roller 1. This tangential direction is located in the extension direction of the vertical centerline of the mounting cavity. This minimizes the friction between the drainage plate 5 and the inner wall of the mounting cavity, providing some protection for the drainage plate 5. Baffles 101 are located on both sides of roller 1, primarily for axial limiting, preventing the drainage plate 5 from laterally slipping out of the groove of roller 1. A limiting rod 102 is located between the two baffles 101, preventing the drainage plate 5 from slipping off roller 1 during the sinking process with the vibratory impactor 8. The roller 1 effectively assists in smoother movement of the drainage plate 5 within sleeve 4.

[0048] Furthermore, the upper end of the sleeve 4 is provided with a flushing pipe 2, and the water outlet of the flushing pipe 2 extends into the sleeve 4.

[0049] Specifically, a flushing pipe 2 is connected to the upper part of the sleeve 4. Welding is performed so that the end of the flushing pipe 2 extends completely into the sleeve 4 without hindering the sliding of the drainage plate 5 inside the sleeve 4. A valve is installed on the flushing pipe 2. When the drainage plate 5 sinks with the vibratory flusher 8, the valve opens to a certain extent, so that the water pressure is consistent with the main water pressure of the vibratory flusher 8 itself. The sleeve 4 is filled with water. The water pressure inside the sleeve 4 can prevent soil from entering the sleeve 4 and effectively prevent blockage caused by excessive flushing during sinking.

[0050] Furthermore, the pile shoe 7 is a weight-increasing and thickened type of pile shoe 7.

[0051] Specifically, at the moment the vibratory impactor 8 and the sleeve 4 are lifted, the system will have an upward acceleration. According to Newton's first law, the greater the mass of an object, the greater its inertia, and the more it tends to maintain its original state of rest. The weighted pile shoe 7, with its greater inertia, can more effectively resist the tendency of the sleeve 4 to be "lifted up" due to its rapid lifting, thus making it easier to detach from the bottom of the sleeve 4.

[0052] During the synchronous sinking phase, the additional weight helps the entire system (especially the drainage board 5) descend more smoothly, reducing potential resistance. When the pile shoe 7 is placed at the bottom of the soft soil layer, its significant self-weight acts like a "small anchor," allowing it to sit more stably at the design depth through gravity, preventing floating or displacement during backfilling or subsequent construction. The thicker wall makes the pile shoe 7 more robust and durable, able to withstand the enormous impact and vibration generated when the vibratory compactor 8 penetrates the hard layer, avoiding deformation or damage. The thickened pile shoe 7 has a larger outer surface area. When the pile shoe 7 is placed in soft clay, the contact area between its sidewalls and the surrounding soil is larger, resulting in greater static friction. This increased friction is the primary force ensuring that the pile shoe 7 is not carried out when the casing 4 is lifted. Therefore, the pile shoe 7 ensures that the drainage board 5 is reliably placed after reaching the design depth and is not carried out during the lifting of the vibratory compactor 8, thus achieving the expected construction effect.

[0053] Furthermore, the vibratory impactor 8 is fitted with a shock-absorbing rubber pad 6 located between the sleeve 4 and the side wall of the vibratory impactor 8. The shock-absorbing rubber pad 6 is located at the motor connection of the vibratory impactor 8 and is fixed to the vibratory impactor 8 by a hoop 9.

[0054] Specifically, when the vibratory impactor 8 is working, its sidewalls will undergo severe radial (lateral) vibration. Without the damping pad 6, the vibratory impactor 8 would directly collide with the inner wall of the sleeve 4 at high frequency and high intensity. The damping pad 6 is placed in the gap between the vibratory impactor 8 and the sleeve 4, near the end of the sleeve 4. It transforms the hard collision into soft compression of the pad, absorbing the impact energy. The pad 6 is fixed by the hoop 9 to ensure that it will not rotate or fall off under the huge vibration environment, and always remains in the designed position to play its role. The damping pad 6 can reduce the excitation force of the vibratory impactor 8 on the bottom end of the sleeve 4.

[0055] Furthermore, the lifting equipment 13 is a tracked pile driver, which is equipped with a winch. The winch is connected to the guide rod 3 via a wire rope. A water tank 10, a water pump 11, and a generator 12 are located at the rear of the lifting equipment 13. The generator 12 supplies power to the motors of the water pump 11 and the vibratory compactor 8. The water pump 11 pumps water from the water tank 10 to the flushing pipe 2 and the vibratory compactor 8.

[0056] Specifically, the lifting equipment 13 adopts the existing tracked pile driver. The winch is connected to the upper end of the guide rod 3 through a wire rope to realize the sinking and lifting of the guide rod 3. The generator 12 charges the battery of the lifting equipment 13 or directly supplies power to the motor of the vibratory compactor 8 and the water pump 11. The water pump 11 pressurizes the water and pumps it to the vibratory compactor 8 itself and the flushing pipe 2. The tracked pile driver itself has an automatic control system to control the operation of the vibratory compactor 8 and other related electrical equipment, and record relevant data during the vibratory compaction process.

[0057] A construction method for soil remediation includes the following steps: S1: One end of the drainage board 5 passes through the casing 4 and extends to the outside of the casing 4 to connect with the pile shoe 7. The other end of the drainage board 5 is manually tied so that the pile shoe 7 is tightly attached to the bottom of the casing 4. S2: Start the vibratory compactor 8 and water pump 11. The vibratory compactor 8 is aligned with the treatment area to start drilling. The vibratory compactor 8 pulls the drainage board 5 to sink synchronously, passing through the hard layer 15 to reach the soft layer 16 at the designed depth. While the vibratory compactor 8 sinks, pressurized water is injected into the casing 4. S3: After the vibratory compactor 8 drills to the designed depth, the water pressure injected into the casing 4 is increased, and the lifting equipment 13 lifts the vibratory compactor 8. Under the action of the water pressure in the pile shoe 7 and the casing 4, the drainage board 5 automatically sinks and remains in the soft soil layer. S4: After the vibratory compactor 8 is completely lifted out of the soil layer, the drainage board 5 is cut to complete the construction of the drainage board 5. The lifting equipment 13 is moved to the next treatment area, and the above steps are repeated to complete the construction of the drainage board 5 in all treatment areas.

[0058] Furthermore, after the vibratory compactor 8 is lowered to the designed depth, if compaction is required, the vibratory compactor 8 will be lifted up and compacted section by section until it reaches the ground, thus simultaneously completing the vibratory compaction and the construction of the drainage board 5.

[0059] In this scheme, the end of the drainage board 5 passes through the roller 1 and the sleeve 4 and is connected to the thickened and weighted pile shoe 7. The free end of the drainage board 5 (the end located on the ground) is manually tightened to make the pile shoe 7 fit tightly against the bottom of the sleeve 4. The vibratory compactor 8 and the water pump 11 are turned on. The vibratory compactor 8 is aimed at the treatment area and drills a hole downwards (the drilling water pressure is set at 0.5MPa-0.7MPa). The vibratory compactor 8 simultaneously pulls the sleeve 4 down to the design depth. When hard soil layers are encountered during the drilling process, the water pressure can be increased to drill the hole to the design pile bottom elevation. At the same time as the vibratory compactor 8 sinks, the valve on the flushing pipe 2 at the top of the sleeve 4 is opened one-quarter (the water pressure is consistent with the main water pressure of the vibratory compactor 8) to fill the sleeve with water. After the vibratory compactor 8 drills the hole to the design depth, the automatic control system automatically changes the water pressure to 0.2MPa-0.3MPa. At this time, the valve on the flushing pipe 2 is fully opened to help the pile shoe 7 fall off and leave a strip. The operator of the tracked pile driver slowly pulls up the vibratory compactor 8. Under the weight of the thickened and weighted pile shoe 7 and the water pressure impact inside the casing 4, the drainage board 5 automatically sinks and leaves a strip. The vibratory compactor 8 is then pulled up (the strips can be densified in sections as needed) to the ground. The drainage board 5 is then manually cut to achieve vibratory compaction and drainage board 5 construction. The above cycle is repeated until the vibratory compaction and drainage board 5 construction of the entire treatment area are completed.

[0060] This construction method combines vibro-compaction with drainage board 5 technology to form an innovative composite foundation treatment technology. Both vibro-compaction and drainage board 5 construction are common foundation treatment processes, but traditionally they are difficult to implement simultaneously. Usually, the drainage board 5 construction must be completed first, and vibro-compaction can only be carried out after 4-7 months of preloading and initial consolidation of the soft soil. Otherwise, vibro-compaction operations are prone to disturbing and removing the already laid drainage board 5, affecting its drainage effect.

[0061] This scheme enables the simultaneous construction of vibratory compaction and drainage board 5, or the drainage board 5 can be laid separately. After the vibratory compactor 8 pulls the sleeve 4 down to the design depth, it can be pulled up directly, and only the construction of drainage board 5 can be completed. If, after sinking to the design depth, vibratory compaction is carried out according to the design requirements until the ground, the vibratory compaction and drainage board 5 can be completed simultaneously.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A soil remediation device combining a vibratory compactor and a drainage board, characterized in that, include: Vibratory compactor (8) is located directly above the treatment area with hard layer (15) and soft layer (16). Within the treatment area, the vibratory compactor (8) makes a hole and sinks down, first passing through the hard layer (15), and then sinking into the soft layer (16) until it reaches the design depth. Drainage board (5), one end of drainage board (5) is on the ground, and the other end sinks to the design depth synchronously with vibratory compactor (8). Vibratory compactor (8) is lifted up and moves relative to drainage board (5). The soft soil backfill hole makes the end of drainage board (5) sinking with vibratory compactor (8) remain in the soft soil layer (16). Vibratory compactor (8) stops working or continues working to compact the soil layer section by section during the lifting process.

2. The soil remediation device combining a vibratory compactor and a drainage board according to claim 1, characterized in that, Also includes: Guide rod (3), one end of guide rod (3) is connected to lifting equipment (13), and the other end is connected to vibratory impactor (8). The sleeve (4) is fixed on the side wall of the guide rod (3). The lower end of the sleeve (4) extends to the side wall of the vibratory compactor (8). The sleeve (4) has an installation cavity that allows the drainage plate (5) to pass through. The sleeve (4) is open at both ends. The end of the drainage plate (5) that sinks with the vibratory compactor (8) is connected to a pile shoe (7) that is closely attached to the bottom of the sleeve (4).

3. A soil remediation device combining a vibratory compactor and a drainage board according to claim 2, characterized in that, The guide rod (3) has a movable guide on its side wall, and the drainage board (5) is placed on the guide.

4. A soil remediation device combining a vibratory compactor and a drainage board according to claim 3, characterized in that, The guide is a roller (1), and a gate-shaped support frame (14) is fixed on the side wall of the guide rod (3). The roller (1) is rotatably mounted on the support frame (14). Baffles (101) are provided on both sides of the roller (1), and a limiting rod (102) is provided between the two baffles (101). The drainage plate (5) is located inside the limiting rod (102).

5. A soil remediation device combining a vibratory compactor and a drainage board according to claim 2, characterized in that, The upper end of the sleeve (4) is provided with a flushing pipe (2), and the water outlet of the flushing pipe (2) extends into the sleeve (4).

6. A soil remediation device combining a vibratory compactor and a drainage board according to claim 2, characterized in that, The pile boot (7) is a weight-increasing and thickened type of pile boot (7).

7. A soil remediation device combining a vibratory compactor and a drainage board according to claim 2, characterized in that, The vibratory impactor (8) is fitted with a shock-absorbing rubber pad (6) located between the sleeve (4) and the side wall of the vibratory impactor (8). The shock-absorbing rubber pad (6) is located at the motor connection of the vibratory impactor (8) and is fixed to the vibratory impactor (8) by a hoop (9).

8. A soil remediation device combining a vibratory compactor and a drainage board according to claim 2, characterized in that, The lifting equipment (13) is a tracked pile driver. The tracked pile driver is equipped with a winch. The winch is connected to the guide rod (3) by a wire rope. The rear side of the lifting equipment (13) is equipped with a water tank (10), a water pump (11), and a generator (12). The generator (12) supplies power to the motors of the water pump (11) and the vibratory compactor (8). The water pump (11) pumps the water pump (11) in the water tank (10) to the flushing pipe (2) and the vibratory compactor (8).

9. A construction method for soil remediation, applied to a soil remediation device combining a vibratory compactor and a drainage board as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: One end of the drainage board (5) passes through the casing (4) and extends to the outside of the casing (4) to connect to the pile shoe (7). The other end of the drainage board (5) is manually pulled so that the pile shoe (7) is tightly attached to the bottom of the casing (4). S2: Turn on the vibratory compactor (8) and water pump (11). The vibratory compactor (8) is aligned with the treatment area to start drilling. The vibratory compactor (8) pulls the drainage board (5) to sink synchronously, passing through the hard layer (15) to reach the soft layer (16) at the designed depth. While the vibratory compactor (8) sinks, pressurized water is injected into the casing (4). S3: After the vibratory compactor (8) drills to the designed depth, the water pressure injected into the casing (4) is increased, and the vibratory compactor (8) is lifted by the lifting equipment (13). Under the action of the water pressure in the pile shoe (7) and the casing (4), the drainage board (5) automatically sinks and remains in the soft soil layer. S4: After the vibratory compactor (8) is completely lifted out of the soil layer, the drainage board (5) is cut off to complete the construction of the drainage board (5). The lifting equipment (13) is moved to the next treatment area and the above steps are repeated to complete the construction of the drainage board (5) in all treatment areas.

10. A construction method for soil remediation according to claim 9, characterized in that, After the vibratory compactor (8) is lowered to the designed depth, if compaction is required, the vibratory compactor (8) will be lifted up and compacted section by section until it reaches the ground, and the vibratory compaction and drainage board (5) construction will be completed simultaneously.

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