System and method for treating dredged soil using a woven geotextile in combination with vacuum preloading

Abstract

The present application relates to a kind of woven geotextile combined vacuum preloading method processing dredged soil system, including dredged soil filling pond, pumping pipeline system, woven geotextile drainage layer and vacuum pumping device, the dredged soil filling pond is filled with dredged soil, multiple woven geotextile drainage layer is sequentially laid in dredged soil according to certain interval, the woven geotextile drainage layer is composed of multiple layers of woven geotextile layer layer by layer superposition, multiple layers of woven geotextile form dredged soil drainage channel, and woven geotextile drainage layer is connected with external vacuum device through multiple hand joints via pumping pipeline system.The system uses woven geotextile drainage layer to cover whole layer of dredged soil as drainage channel, greatly increases drainage area, while woven geotextile has good drainage performance and moisture conducting performance, enhances the rate and drainage effect of drainage, improves construction efficiency.

Description

Technical Field

[0001] This invention relates to the field of construction engineering, and in particular to a system and method for treating dredged soil using a combination of woven geotextiles and vacuum preloading. Background Technology

[0002] The large-scale land reclamation projects in my country mean that more dredged soil with high water content and high clay content needs to be treated. This type of dredged soil is extremely fluid, lacking structure and strength, requiring significant land resources and manpower for treatment. Vacuum preloading uses vacuum pumps to extract water and air, reducing pore water pressure, compressing pore volume, and causing consolidation settlement. This increases effective stress and improves the shear strength and bearing capacity of the foundation soil. Vacuum preloading offers advantages such as high construction efficiency, low treatment cost, environmental friendliness, and ease of construction, and is widely used for treating such high-water-content dredged soil foundations. Traditional vertical drainage board vacuum preloading suffers from large deformation and settlement during treatment, causing the drainage boards to easily bend, affecting vacuum transmission and resulting in poor soil consolidation. In contrast, horizontal drainage board vacuum preloading avoids large-area bending by vertically arranging horizontal drainage boards in layers, ensuring efficient vacuum transmission. This arrangement shortens the drainage path as the vertical spacing decreases with settlement, thus improving drainage efficiency, consolidation efficiency, and construction period. However, due to the high water content of the dredged soil, it lacks bearing capacity, and the construction process lacks a relatively stable platform, making the construction of horizontal drainage boards difficult. Furthermore, the spaced arrangement of the horizontal drainage boards prevents large-area installation, leading to uneven consolidation of the dredged soil – the soil strength decreases as the distance from the drainage body increases. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a system for treating dredged soil by combining woven geotextiles with vacuum preloading. This system has high construction efficiency, low construction difficulty, good drainage effect, and low economic cost.

[0004] This invention is accomplished by the following technical solution: a system for treating dredged soil using a combined woven geotextile and vacuum preloading method, comprising a dredged soil reclamation pool, a drainage pipeline system, a woven geotextile drainage layer, and a vacuum device. The dredged soil reclamation pool is filled with dredged soil, and multiple woven geotextile drainage layers are laid sequentially within the dredged soil at certain intervals. Each woven geotextile drainage layer is composed of multiple layers of woven geotextile stacked one on top of the other, forming a drainage channel for the dredged soil. The woven geotextile drainage layer is connected to an external vacuum device via multiple hand-shaped joints through the drainage pipeline system.

[0005] Furthermore, the woven geotextile layer is composed of multiple layers of woven geotextile, which is made of interwoven weft yarns and warp yarns. The interwoven warp and weft yarns form multiple weave cycles, and each weave cycle is formed by two drainage yarns and one reinforcing yarn arranged in a regular pattern.

[0006] Furthermore, the discontinuous boundaries of the multi-layered woven geotextile layers are sealed by heat fusion.

[0007] Furthermore, the woven geotextile layer is wavy near the end of the drainage pipeline system. Further, the construction method for treating dredged soil using a combination of woven geotextile and vacuum preloading includes the following steps:

[0008] S1. Excavate and dredge soil to fill the pond;

[0009] S2. Lay the drainage pipeline system, which consists of multiple vertical pipes and horizontal branch pipes.

[0010] Multiple vertical pipes are installed on the side walls of the dredged soil reclamation pool. Each vertical pipe is connected to an L-shaped connector in sequence along the height direction. The vertical pipes are horizontally inserted and fixed to the side walls of the dredged soil reclamation pool through multiple U-shaped forks. The vertical pipe in the middle of each side wall is the vertical main pipe, and the other vertical pipes are connected to the vertical main pipe.

[0011] S3. Prepare a woven geotextile layer.

[0012] Multiple layers of woven geotextile are stacked, and the non-connected boundaries at the edges are sealed by heat fusion after the stacking is completed.

[0013] S4. A geotextile drainage layer is laid.

[0014] The dredged soil filling device fills the first layer of dredged soil, and then the foam platform is used to lay the first layer of woven geotextile. This layer of woven geotextile is tensioned and tightened to form the first construction platform. Then, multiple layers of woven geotextile are laid to form the woven geotextile drainage layer until the first layer of woven geotextile drainage layer is completed.

[0015] S5. Equipped with a geotextile drainage layer.

[0016] An opening of the same size as the hand-shaped connector is cut at the edge of the geotextile drainage layer. The multi-layered woven geotextile is then inserted into the hand-shaped connector, which is connected to the corresponding L-shaped connector via a transverse branch pipe.

[0017] S6. A geotextile drainage layer is laid in sequence.

[0018] The next layer of dredged soil is blown into the dredged soil filling pool. After each layer is blown in, the S4 and S5 operations are repeated until the dredged soil in the dredged soil filling pool reaches the required height.

[0019] S7. Connect each vertical main pipe to the vacuum device, and use silt or a sealing membrane and geotextile to cover the dredged soil layer to form a sealed environment;

[0020] S8. Turn on the vacuum device to remove water from the dredged soil.

[0021] The effects of this invention are as follows:

[0022] 1. In this invention, geotextile is used to cover the entire layer of dredged soil, allowing vacuum to be transferred to the entire dredged soil layer, greatly increasing the drainage area;

[0023] 2. The dredged soil drainage channels adopt a multi-layered method of woven geotextile, which increases the number of drainage channels and improves drainage efficiency. Non-connecting boundaries are sealed by heat fusion, which improves the vacuum transfer efficiency between layers, reduces the probability of drainage channel blockage, and eliminates the traditional process of sewing the drainage board to the geotextile through vacuum preloading, greatly improving production efficiency.

[0024] 3. The woven geotextile is a water-conducting and reinforced geotextile made by interweaving two types of yarns with different properties as weft and warp yarns respectively. It has good strength, toughness and drainage properties, can be used as a construction platform and can also accelerate the drainage rate.

[0025] 4. The large-area integral laying of geotextile greatly increases the drainage channels and reduces the uneven settlement caused by traditional vertical drainage board vacuum preloading foundation treatment.

[0026] 5. The dredged soil drainage channel is equipped with wavy folds at the joint with the transverse branch pipe, so that the dredged soil drainage channel can be stretched laterally as the soil settles.

[0027] 6. The system has high construction efficiency, low construction difficulty, good drainage effect, and low economic cost. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first embodiment of a system for treating dredged soil using a combination of woven geotextiles and vacuum preloading.

[0029] Figure 2 for Figure 1 A schematic diagram of a partial structure of interwoven geotextiles;

[0030] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of a woven geotextile.

[0031] Figure 4 for Figure 1 A schematic cross-sectional view of the hand-shaped joint connection of the drainage layer with woven geotextile.

[0032] Figure 5 for Figure 1 A schematic diagram of the drainage layer with woven geotextile in the middle;

[0033] Figure 6 This is a schematic diagram of the second embodiment of a system for treating dredged soil using a combination of woven geotextiles and vacuum preloading.

[0034] Figure 7 for Figure 6 A schematic diagram of the supporting frame structure;

[0035] Figure 8 This is a schematic diagram of the structure after the woven geotextile drainage layer is connected to the supporting frame.

[0036] Figure 9 for Figure 8 A schematic diagram of the connection point between the medium-sized connector and the support frame after insertion.

[0037] Figure 10 for Figure 8 Schematic diagram of the structure of the medium-sized connector;

[0038] Figure 11 for Figure 6 Schematic diagram of the structure of the central extraction vertical pipe;

[0039] Figure 12 for Figure 11 A partial cross-sectional structural diagram of the central extraction vertical pipe after it is connected;

[0040] Figure 13 for Figure 6 Another structural diagram of the central extraction vertical pipe;

[0041] Figure 14 for Figure 13 A partial cross-sectional structural diagram of the central extraction vertical pipe after it is connected;

[0042] Figure 15 for Figure 7 A partial structural diagram of the junction of the middle strip frame. Detailed Implementation

[0043] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0044] Reference Figure 1-5The first embodiment of this invention proposes a system for treating dredged soil using a combined woven geotextile and vacuum preloading method. The system includes a dredged soil reclamation tank 1, a drainage pipeline system 2, a woven geotextile drainage layer 3, and a vacuum device 4. The dredged soil reclamation tank 1 is filled with dredged soil. Multiple woven geotextile drainage layers 3 are sequentially laid within the dredged soil at certain intervals. These drainage layers 3 are connected to the external vacuum device via multiple hand-shaped joints through the drainage pipeline system 2. The woven geotextile covers the entire layer of dredged soil, allowing the vacuum level to be transferred to the entire dredged soil layer. This significantly increases the drainage area, improves construction efficiency and drainage effect, reduces construction difficulty and economic costs, and alleviates the uneven settlement problem that occurs during traditional vacuum preloading foundation treatment using drainage boards.

[0045] The woven geotextile drainage layer 3 is composed of multiple layers of woven geotextile stacked one on top of another. These multiple layers are connected by hand-shaped joints 6. The woven geotextile drainage layer forms a drainage channel for dredged soil. The use of multiple layers of woven geotextile increases the drainage capacity and improves drainage efficiency. Each woven geotextile layer consists of multiple layers of woven geotextile 5, which are interwoven with weft yarns 51 and warp yarns 52. The interweaving of warp and weft yarns 51 forms multiple weave cycles. Each weave cycle consists of two drainage yarns and one reinforcing yarn arranged in a regular pattern. Using two yarns with different properties as weft yarns 52 and warp yarns 51 to interweave creates a water-conducting and reinforcing geotextile with good strength, toughness, and drainage properties. It can serve as a construction platform and also accelerate the drainage rate. The discontinuous boundaries of the multi-layered woven geotextile, after being stacked to form a woven geotextile layer, are sealed by heat fusion 11. This improves the vacuum transfer efficiency between layers, reduces the probability of drainage channel blockage, and eliminates the need for the traditional vacuum preloading process of sewing the drainage board to the geotextile, greatly improving production efficiency. The end of the woven geotextile layer near the drainage pipeline system is wavy, allowing the dredged soil drainage channel to stretch laterally as the soil settles.

[0046] The specific steps of the above-mentioned construction method for treating dredged soil using a combination of woven geotextiles and vacuum preloading are as follows:

[0047] S1. Excavate and dredge soil to fill the pond 1.

[0048] S2. Lay the drainage pipeline system 2, which consists of multiple vertical pipes 21 and horizontal branch pipes 22.

[0049] Multiple vertical pipes 21 are installed on each side wall of the dredged soil reclamation pool. Each vertical pipe is connected to L-shaped joints layer by layer along the height direction. The L-shaped joints are used to connect to the horizontal branch pipes 22. The vertical pipes are horizontally inserted and fixed to the side wall of the dredged soil reclamation pool by multiple U-shaped forks. The vertical pipe in the middle of each side wall is the vertical main pipe, and the other vertical pipes are connected to the vertical main pipe through pipes.

[0050] S3. Prepare a woven geotextile layer.

[0051] Multiple layers of woven geotextile are stacked, and the non-connected boundaries at the edges are sealed by heat fusion after the stacking is completed.

[0052] S4. A geotextile drainage layer 3 is laid.

[0053] The dredged soil filling device 7 fills the first layer of dredged soil, and then the foam platform is used to lay the first layer of woven geotextile. This layer of woven geotextile is tensioned and tightened to form a temporary construction platform, and then multiple layers of woven geotextile are laid to form a woven geotextile drainage layer until the first layer of woven geotextile drainage layer is completed.

[0054] S5. Equipped with a geotextile drainage layer.

[0055] An opening of the same size as the hand-shaped connector is cut at the edge of the geotextile drainage layer. The multi-layered woven geotextile is inserted into the hand-shaped connector 6. The hand-shaped connector is connected to the corresponding L-shaped connector through the transverse branch pipe 22.

[0056] S6. A geotextile drainage layer is laid in sequence.

[0057] The next layer of dredged soil is blown into the dredged soil filling pool 1. After each layer is blown in, the S4 and S5 operations are repeated until the dredged soil in the dredged soil filling pool reaches the required height.

[0058] S7. Connect each vertical main pipe to the vacuum device, and use silt or a sealing membrane and geotextile to cover the dredged soil layer to form a sealed environment;

[0059] S8. Turn on the vacuum device to remove water from the dredged soil.

[0060] Reference Figure 6-15The second embodiment of the present invention proposes a system for treating dredged soil using a combination of woven geotextile and vacuum preloading, which is basically the same as the first embodiment, except that: a support frame is set inside the dredged soil reclamation pool, the support frame including a bottom support frame 8 and multiple vertical support frames 9, with multiple vertical support frames 9 evenly distributed on each side of the bottom support frame 8. The vertical support frames 9 have symmetrical inward concavities 91 at the middle of both sides, forming inner slots 92 within the inner cavity of the vertical support frame, and outer insertion parts 93 on the outer wall of the vertical support frame. The front side of the vertical support frame 9 has vertical strip-shaped holes 94.

[0061] The drainage pipe 2 is composed of multiple drainage risers 23 connected together, and adjacent drainage risers are detachably connected. Each drainage riser is provided with a horizontal branch pipe 22, which is located at the lower end of the drainage pipe. The outer wall of each drainage riser is provided with at least one limiting slider 24 adapted to the inner slot. Preferably, there are two limiting sliders, one of which is located at the upper end of the drainage riser, and the other is located between the horizontal branch pipe and the upper limiting slider. Multiple hand-shaped connectors 6 are evenly connected along the edge of the woven geotextile drainage layer. The bottom of the hand-shaped connector is provided with a limiting block 61, and the front end of the limiting block is provided with an insertion groove 62. The open end of the insertion groove has a guide block 63 arranged opposite to it. When laying the woven geotextile drainage layer, first connect the hand-shaped connectors 6 on the woven geotextile drainage layer to the horizontal branch pipes 22 of a drainage vertical pipe. Then insert the drainage vertical pipe into the corresponding vertical support frame cavity. The limiting slider 24 of the drainage vertical pipe is engaged in the inner slot 92, and the horizontal branch pipe 22 passes through the vertical strip hole 94. At the same time, the insertion groove 62 of the limiting block is engaged with the outer insertion part 93 of the vertical support frame, that is, the guide block 63 of the insertion groove is inserted into the groove formed by the protrusion 91. The limiting slider 24 of the drainage vertical pipe moves downward along the inner slot 92, and the insertion groove 62 of the limiting block moves downward along the outer insertion part 93, so that the drainage vertical pipe 23 slides downward along the inner cavity of the vertical support frame 9 to the designated position, so that the woven geotextile drainage layer 3 is laid to the designated position. By sliding the extraction vertical pipe 23 along the inner cavity of the vertical support frame to the upper surface of the dredged soil, workers are no longer required to enter the dredged soil reclamation pool to lay the woven geotextile drainage layer, reducing the difficulty of the work and increasing the laying speed. At the same time, during the drainage consolidation process and soil settlement, the bottom extraction vertical pipe continues to move downward along the inner cavity of the vertical support frame, assisting the woven geotextile drainage layer to move downward with the soil settlement.

[0062] The bottom of the extraction vertical pipe 23 is provided with a plug-in portion 25, the diameter of which is smaller than the diameter of the extraction vertical pipe, and a sealing gasket layer 26 is provided on the outer wall of the plug-in portion. When connecting adjacent extraction vertical pipes, the plug-in portion of the extraction vertical pipe is inserted into the inner cavity of the top end of the adjacent extraction vertical pipe. A limiting flange 28 is provided at the connection between the plug-in portion and the extraction vertical pipe, and the transverse branch pipe 22 is located above the limiting flange 28. When the plug-in portion 25 is inserted into the top end of the adjacent extraction vertical pipe, the limiting flange 28 abuts against the top end of the adjacent extraction vertical pipe. The plug-in portion can also be in another embodiment, specifically including: the plug-in portion 25 is composed of a first plug-in portion 251 and a second plug-in portion 252, the first plug-in portion has multiple limiting spring pieces 253, and the upper ends of the second plug-in portion 252 and the first plug-in portion 251 are provided with self-expanding sealing gasket layers 26. The diameter of the first insertion part 251 is smaller than that of the second insertion part 252. An annular stepped surface 254 is formed between the first insertion part 251 and the second insertion part 252. The diameter of the second insertion part is smaller than the inner diameter of the extraction vertical pipe. The upper end of the extraction vertical pipe has a raised edge 27. When adjacent extraction vertical pipes are connected, the insertion part at the bottom of the extraction vertical pipe is inserted into the upper end of the adjacent extraction vertical pipe until the limiting spring passes through the raised edge 27 and abuts against the bottom of the raised edge. The annular stepped surface abuts against the upper end surface of the raised edge, thus completing the connection of the adjacent extraction vertical pipes.

[0063] The construction method for treating dredged soil using the above-mentioned woven geotextile combined with vacuum preloading method is as follows:

[0064] S1. Install a support frame inside the dredged soil reclamation pool.

[0065] The support frame is placed inside the dredged soil reclamation pool. The vertical support frame 9 on the same side is fixedly connected by a horizontal bar 10. The horizontal bar is horizontally inserted and fixed to the side wall of the dredged soil reclamation pool by multiple U-shaped forks. The bottom support frame 8 is installed at the bottom of the dredged soil reclamation pool.

[0066] The bottom mounting frame 8 is composed of multiple strip frames 81, with adjacent strip frames connected by a telescopic adjustment part 82. The telescopic adjustment part 82 comprises a fixed part 821 and two telescopic sleeves 822. One end of each telescopic sleeve 822 is connected to the fixed part 821, and the other end of each telescopic sleeve 822 is respectively fitted into the inner cavity of the corresponding strip frame 81. In the retracted state, the telescopic sleeves 822 are placed inside the inner cavity of the strip frame. When the bottom mounting frame 8 needs to be adjusted according to the position of the dredged soil reclamation tank sidewall, the telescopic sleeves 822 are pulled out until the horizontal bar 10 on the vertical support abuts against the sidewall of the dredged soil reclamation tank. Then, multiple U-shaped forks are used to fix the horizontal bar to the sidewall of the dredged soil reclamation tank.

[0067] S2. Equipped with a geotextile drainage layer.

[0068] Multiple hand-shaped joints 6 are evenly connected to the edge of the woven geotextile drainage layer. The horizontal branch pipes 22 on the vertical drainage pipes are connected to the hand-shaped joints 6. Each hand-shaped joint is connected to a vertical drainage pipe 23. The bottom of the bottom vertical drainage pipe is not open, while the other vertical drainage pipes are in a hollow and conductive state.

[0069] Specifically, multiple layers of woven geotextile are stacked, and the non-connected boundaries at the edges are sealed by heat fusion to form a woven geotextile layer. These multiple woven geotextile layers are then stacked one on top of the other to form a woven geotextile drainage layer 3. An opening of the same size as a hand-shaped connector is cut at the edge of the drainage layer. Multiple layers of woven geotextile are inserted into the hand-shaped connector 6, and then the hand-shaped connector is connected to the horizontal branch pipe 22 of the vertical drainage pipe.

[0070] S3. Lay the first layer of geotextile drainage layer.

[0071] First, the first layer of dredged soil is blown and filled to the required height. Then, each vertical pumping pipe 23 is inserted into the corresponding vertical support frame. The limiting slider 24 of the vertical pumping pipe is inserted into the inner slot 92 of the vertical support frame. The insertion groove 62 of the bottom limiting block of the hand-shaped connector is inserted into the outer insertion part 93 of the vertical support frame. The limiting slider 24 and the limiting block 61 move downward along the inner and outer walls of the vertical support frame until the first layer of woven geotextile drainage layer is laid on the surface of the first layer of dredged soil.

[0072] S4. Lay the second layer of geotextile drainage layer.

[0073] The second layer of dredged soil is blown onto the surface of the first layer of woven geotextile drainage layer to the required height. The height of the second layer of dredged soil corresponds to the top of the first layer of vertical drainage pipe. The drainage pipe 23 of the second layer of woven geotextile drainage layer is slid down along the vertical support frame 9 to the top of the first layer of drainage pipe. The second layer of drainage pipe 23 is pressed down by an external auxiliary device until the insertion part 25 at the bottom of the second layer of drainage pipe is inserted into the inner cavity at the top of the first layer of drainage pipe, thus completing the connection between the first layer of drainage pipe and the second layer of drainage pipe. The second layer of woven geotextile drainage layer is laid on the second layer of dredged soil.

[0074] Specifically, the external auxiliary device can be an electric telescopic device or a hydraulic telescopic device. The telescopic rod of the electric telescopic device or the hydraulic telescopic device is inserted into the inner cavity of the vertical support frame 9 and presses down the pumping vertical pipe. The plug part at the bottom of the pumping vertical pipe is inserted into the inner cavity at the top of the adjacent pumping vertical pipe 23, thus completing the connection between the first layer of pumping vertical pipes and the second layer of pumping vertical pipes.

[0075] S5. A geotextile drainage layer is laid in sequence.

[0076] The next layer of dredged soil is blown into the dredged soil filling pool. After each layer is blown in, the S4 operation is repeated until the dredged soil in the dredged soil filling pool reaches the required height.

[0077] S6. The vertical drainage pipes of each side of the dredged soil reclamation pool converge to one of the vertical drainage pipes through branch pipes. This vertical drainage pipe is the vertical main pipe. Each vertical main pipe is connected to the vacuum pumping device. A sealed environment is formed by covering the dredged soil layer with silt or a sealing membrane and geotextile.

[0078] S7. Turn on the vacuum device to remove water from the dredged soil.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A system for treating dredged soil by a combined vacuum preloading method using a woven geotextile, characterized by: The application relates to a dredged soil filling pool, a pumping pipeline system, a woven geotextile drainage layer and a vacuum pumping device, wherein the dredged soil filling pool is filled with dredged soil, a plurality of woven geotextile drainage layers are sequentially laid in the dredged soil at certain intervals, the woven geotextile drainage layer is composed of a plurality of woven geotextile layers which are stacked layer by layer, the plurality of woven geotextile layers form a dredged soil drainage channel, the woven geotextile drainage layer is connected with the external vacuum device through the pumping pipeline system via a plurality of hand-shaped joints, the woven geotextile layer is composed of a plurality of woven geotextile layers, the woven geotextile layer is formed by interweaving weft yarns and warp yarns, the weft yarns and the warp yarns are interwoven to form a plurality of weave cycles, one weave cycle is formed by regularly arranging two drainage yarns and one reinforcing yarn, the non-continuous boundary of the woven geotextile layer is sealed by heat melting, and the end of the woven geotextile layer close to the pumping pipeline system is arranged in a wave shape.

2. A construction method of a dredged soil system treated by the woven geotextile combined vacuum preloading method according to claim 1, characterized by: The steps are as follows, S1. excavating the dredged soil filling pool; S2. laying the pumping pipeline system, wherein the pumping pipeline system is composed of a plurality of vertical pipes and horizontal branch pipes, A plurality of vertical pipes are arranged on the side walls of the dredged soil filling pool respectively, L-shaped joints are sequentially connected on each vertical pipe along the height direction layer by layer, the vertical pipes are horizontally inserted into the side walls of the dredged soil filling pool through a plurality of U-shaped forks, the vertical pipes in the middle of each side wall are vertical main pipes, and the other vertical pipes are connected to the vertical main pipes; S3. preparing the woven geotextile layer, The woven geotextile layers are stacked, and the non-connected boundary at the edge of the stacked woven geotextile layers is sealed by heat melting; S4. laying the woven geotextile drainage layer, The dredged soil filling device fills the first layer of dredged soil, a foam platform is used for construction and laying of the first layer of woven geotextile layer, the first layer of woven geotextile layer is tensioned and tightened to form a first layer of construction platform, and then a plurality of layers of woven geotextile layers are continuously laid to form the woven geotextile drainage layer until the laying of the first layer of woven geotextile drainage layer is completed; S5. installing the woven geotextile drainage layer, An opening with the same size as the hand-shaped joint is cut at the edge of the woven geotextile drainage layer, and the plurality of layers of woven geotextile layers are inserted into the hand-shaped joint, and the hand-shaped joint is connected with the corresponding L-shaped joint through the horizontal branch pipe; S6. sequentially laying the woven geotextile drainage layer, The next layer of dredged soil is filled into the dredged soil filling pool, and after each layer is filled, the operations of S4 and S5 are repeatedly cycled until the dredged soil in the dredged soil filling pool reaches the required height; S7. connecting each vertical main pipe with the vacuum pumping device, and forming a sealed environment by using sludge or covering a sealing film and a geotextile cloth above the dredged soil layer; S8. starting the vacuum pumping device to drain water from the dredged soil.

3. The system for the treatment of dredged soil according to claim 1, characterized in that: The dredged soil reclamation pond is provided with a support frame, the support frame comprises a bottom support frame and a plurality of vertical support frames, the vertical support frames are uniformly distributed and installed on the bottom support frame, the middle of the two sides of the vertical support frame is symmetrically inwardly recessed, so that the inner cavity of the vertical support frame forms an inner insertion slot, the outer wall of the vertical support frame forms an outer insertion part, the front side of the vertical support frame has a vertical strip-shaped hole, the exhaust pipe is connected by a plurality of exhaust vertical pipes, a horizontal branch pipe is arranged on each exhaust vertical pipe, at least one limiting sliding block matched with the inner insertion slot is arranged on the outer wall of the exhaust vertical pipe, during laying, the hand-shaped joints on the geotextile drainage layer are respectively connected with the horizontal branch pipes of the exhaust vertical pipes, then the exhaust vertical pipes are inserted into the inner cavities of the corresponding vertical support frames, the limiting sliding blocks are clamped into the inner insertion slots, the horizontal branch pipes are pulled out of the vertical strip-shaped holes, and the exhaust vertical pipes are slid downward along the inner cavities of the vertical support frames to the specified positions, so that the geotextile drainage layer is laid to the specified position.

4. The system for the treatment of dredged soil according to claim 3, characterized in that: The bottom of the hand-shaped joint is provided with a limiting block, the front end of the limiting block is provided with an insertion slot, the opening end of the insertion slot is provided with symmetrically arranged guide blocks, during laying of the geotextile drainage layer, the limiting sliding blocks of the exhaust vertical pipes are clamped into the inner insertion slots of the vertical support frames and are moved downward along the inner insertion slots, the insertion slot of the limiting block is inserted into the outer insertion part of the vertical support frame and is moved downward along the outer insertion part.

5. The system for the treatment of dredged soil according to claim 4, characterized in that: The bottom of the exhaust vertical pipe is provided with an insertion part, the diameter of the insertion part is smaller than that of the exhaust vertical pipe, and a sealing pad layer is arranged on the outer wall of the insertion part, when adjacent exhaust vertical pipes are connected, the insertion part of the exhaust vertical pipe is inserted into the inner cavity of the top end of the adjacent exhaust vertical pipe.

6. A construction method of a dredged soil system treated by the geotextile-reinforced soil vacuum preloading method according to any one of claims 3 to 5, characterized by: The steps are as follows, S1. installing a support frame in the dredged soil reclamation pond, The support frame is arranged in the dredged soil reclamation pond, the vertical support frames on the same side are fixedly connected through a horizontal rod, the H horizontal rod is transversely inserted and fixed on the side wall of the dredged soil reclamation pond through a plurality of U-shaped forks, and the bottom support frame is arranged on the bottom of the dredged soil reclamation pond; S2. installing a geotextile drainage layer, The edges of the geotextile drainage layer are uniformly connected with a plurality of hand-shaped joints, the horizontal branch pipes on the vertical exhaust vertical pipes are connected with the hand-shaped joints, one vertical exhaust vertical pipe is connected with each hand-shaped joint, and the bottom end of the bottom vertical exhaust vertical pipe is not provided with an opening; S3. laying a first layer of geotextile drainage layer, The dredged soil reclamation device reclaims the first layer of dredged soil to a required height, each vertical exhaust vertical pipe is inserted into the corresponding vertical support frame, the limiting sliding block of the vertical exhaust vertical pipe is inserted into the inner insertion slot of the vertical support frame, the insertion slot of the limiting block at the bottom of the hand-shaped joint is inserted into the outer insertion part of the vertical support frame, and the limiting sliding block and the limiting block move downward along the inner and outer walls of the vertical support frame until the first layer of geotextile drainage layer is laid on the upper surface of the first layer of dredged soil; S4. laying a second layer of geotextile drainage layer, Blowing the second layer of dredged soil to the required height on the upper surface of the first layer of geotextile drainage layer, the height of the second layer of dredged soil is to the corresponding position of the top end of the vertical drainage pipe of the first layer, sliding the vertical drainage pipe of the second layer of geotextile drainage layer downward along the vertical support frame to the top end of the first layer of vertical drainage pipe, pressing down the second layer of vertical drainage pipe through external auxiliary device until the insertion part at the bottom of the second layer of vertical drainage pipe is inserted into the inner cavity of the top end of the first layer of vertical drainage pipe, completing the connection of the first layer of vertical drainage pipe and the second layer of vertical drainage pipe, and laying the second layer of geotextile drainage layer on the second layer of dredged soil; S5. Laying the geotextile drainage layer in turn, Blowing the next layer of dredged soil into the dredged soil blowing pool, and repeating the operation of S4 after blowing each layer until the dredged soil in the dredged soil blowing pool reaches the required height; S6. The vertical drainage pipes on each side of the dredged soil blowing pool are connected to one of the vertical drainage pipes through branch pipes, and the vertical drainage pipe is a vertical main pipe, each vertical main pipe is connected with the vacuum pumping device, and a sealed environment is formed by using mud or covering a sealing film and geotextile on the dredged soil layer; S7. Starting the vacuum pumping device to remove water from the dredged soil.

Images