System and method for treating dredged soil by combining woven geotextile with vacuum preloading method

Abstract

The invention relates to a woven geotextile combined vacuum preloading method dredged soil treatment system which comprises a dredged soil reclamation pool, a pumping and draining pipeline system, woven geotextile drainage layers and a vacuumizing device, the dredged soil reclamation pool is filled with dredged soil, the woven geotextile drainage layers are sequentially laid in the dredged soil at certain intervals, and the vacuumizing device is connected with the dredged soil reclamation pool. The woven geotextile drainage layer is formed by overlapping a plurality of woven geotextile layers layer by layer, the plurality of woven geotextile layers form a dredged soil drainage channel, and the woven geotextile drainage layer is connected with an external vacuum device through a plurality of hand-shaped connectors via a pumping drainage pipeline system. According to the system, the woven geotextile drainage layer covers the whole layer of dredged soil to serve as a drainage channel, the drainage area is greatly increased, meanwhile, woven geotextile specifically has good drainage performance and moisture guiding performance, the drainage speed is increased, the drainage effect is improved, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to a system and method for treating dredged soil by a woven geotextile combined with a vacuum preloading method. Background Art

[0002] The large-scale development of land reclamation projects in my country means that more dredged soil with high water content and high clay content needs to be treated. This type of dredged soil is highly fluid and basically has no structure and strength. The treatment process requires a large amount of land resources and consumes a lot of manpower and material resources. The vacuum preloading method uses a vacuum pump to extract water and air, thereby reducing the pore water pressure of the soil, compressing the pore volume to produce consolidation settlement, increasing the effective stress, and improving the shear strength and bearing capacity of the foundation soil. The vacuum preloading method has the advantages of high construction efficiency, low treatment cost, environmental protection, and convenient construction. It is widely used to treat such high-water content dredged soil foundations. During the treatment process, the traditional vertical drain board vacuum preloading method produces large deformation and settlement of the soil, which causes the drain board to bend easily, affecting the vacuum transmission, resulting in poor soil consolidation effect. Compared with the traditional vertical drain board vacuum preloading method, the horizontal drain board vacuum preloading method avoids large-area bending by arranging the horizontal drain board in layers vertically, ensuring the vacuum transmission efficiency. This arrangement shortens the drainage path as the vertical spacing decreases with settlement, thereby improving drainage efficiency, consolidation efficiency, and shortening construction period. However, due to the high water content of dredged soil, it basically has no bearing capacity. The lack of a relatively stable construction platform during the construction process makes the construction of horizontal drainage boards more difficult. At the same time, the horizontal drainage boards are arranged at intervals and cannot be laid over a large area, which causes the problem of uneven consolidation when horizontal drainage boards are used to treat dredged soil, that is, the soil strength decreases as the distance from the drainage body increases. Summary of the invention

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a woven geotextile combined with a vacuum preloading method for treating dredged soil. The system has high construction efficiency, low construction difficulty, good drainage effect and low economic cost.

[0004] The present invention is completed by adopting the following technical scheme: a dredged soil treatment system using a woven geotextile combined with a vacuum preloading method, comprising a dredged soil blowing and filling pool, a pumping and drainage pipeline system, a woven geotextile drainage layer and a vacuum extraction device, wherein the dredged soil blowing and filling pool is filled with dredged soil, and a plurality of woven geotextile drainage layers are sequentially laid in the dredged soil at certain intervals, wherein the woven geotextile drainage layer is composed of a plurality of woven geotextile layers stacked layer by layer, and the plurality of woven geotextiles constitute a dredged soil drainage channel, and the woven geotextile drainage layer is connected to an external vacuum device via a plurality of hand-shaped joints through the pumping and drainage pipeline system.

[0005] Furthermore, the woven geotextile layer is composed of multiple layers of woven geotextiles, and the woven geotextile is formed by weft yarns and warp yarns interwoven, and the warp yarns and weft yarns are interwoven to form multiple weave loops, and one weave loop is formed by 2 drainage yarns and 1 reinforcement yarn arranged in a regular pattern.

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

[0007] Furthermore, the woven geotextile layer is arranged in a wave shape near the end of the pumping and drainage pipe system. Furthermore, the construction method of the woven geotextile combined with the vacuum preloading method for treating the dredged soil system comprises the following steps: S1. Excavation of dredged soil filling pond; S2. Lay the extraction and drainage pipeline system, which consists of multiple vertical pipes and horizontal branches. A plurality of vertical pipes are respectively arranged on the side walls of the dredged soil filling pool, each of which is sequentially connected with an L-shaped joint layer by layer in the height direction, and the vertical pipes are laterally inserted and fixed on the side walls of the dredged soil filling pool through a plurality of U-shaped forks, the vertical pipe in the middle of each side wall is a vertical main pipe, and the other vertical pipes are connected to the vertical main pipe; S3. Prepare a woven geotextile layer, The woven geotextile is stacked in multiple layers, and after the stacking is completed, the non-connected edges at the edges are sealed by hot melting; S4. Lay a geotextile drainage layer. The dredged soil blowing and filling device blows the first layer of dredged soil, and then uses a foam platform to lay the first layer of woven geotextile, and then tensions and tightens this layer of woven geotextile to form the first construction platform, and then continues to lay multiple layers of woven geotextile to form a woven geotextile drainage layer, until the first layer of woven geotextile drainage layer is laid; S5. Install a geotextile drainage layer. An opening of the same size as the hand-shaped joint is cut out at the edge of the woven geotextile drainage layer, and the multi-layer woven geotextile is inserted into the hand-shaped joint, and the hand-shaped joint is connected to the corresponding L-shaped joint through a transverse branch pipe; S6. A geotextile drainage layer is laid in sequence. Blow the next layer of dredged soil into the dredged soil blowing pool. After each layer is blown, the S4 and S5 operations are repeated until the dredged soil in the dredged soil blowing pool reaches the required height. S7. Connect each vertical main pipe to the vacuum device, and use silt or cover the dredged soil layer with a sealing film and geotextile to form a sealed environment; S8. Turn on the vacuum device to remove water from the dredged soil.

[0008] The effects of the present invention are as follows: 1. In the present invention, the whole layer of dredged soil is covered with a woven geotextile, and the vacuum degree can be transmitted to the whole dredged soil layer, which greatly increases the drainage area; 2. The dredged soil drainage channel adopts the method of multi-layer superposition of woven geotextiles, which increases the drainage channel and improves the drainage efficiency. The non-connected boundaries are sealed by hot melting, which improves the vacuum transmission efficiency between layers and reduces the probability of clogging of the drainage channel. At the same time, the process of sewing the drainage board and geotextile by traditional vacuum preloading is omitted, which greatly improves the production efficiency; 3. The woven geotextile is a water-conducting reinforced geotextile made by weaving two kinds of yarns with different characteristics as weft yarns and warp yarns, which has good strength, toughness and drainage, can be used as a construction platform, and can also speed up the drainage rate; 4. The large area is paved with geotextiles, which greatly increases the drainage channel and reduces the uneven settlement caused by the vacuum preloading foundation treatment process of the traditional vertical drainage board; 5. The dredged soil drainage channel is provided with wave-shaped folds at the joint end with the lateral branch pipe, so that the dredged soil drainage channel can be stretched laterally due to soil settlement; 6. The system has high construction efficiency, low construction difficulty, good drainage effect and low economic cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of a first embodiment of a system for treating dredged soil by a woven geotextile combined with a vacuum preloading method; Figure 2 for Figure 1 A schematic diagram of the interwoven local structure of a woven geotextile; Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of a cross section of a woven geotextile; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the hand-shaped joint connection of the geotextile drainage layer; Figure 5 for Figure 1 Schematic diagram of the structure of the geotextile drainage layer; Figure 6 It is a structural schematic diagram of a second embodiment of a system for treating dredged soil by a woven geotextile combined with a vacuum preloading method; Figure 7 for Figure 6 Structural diagram of the middle support frame; Figure 8 It is a schematic diagram of the structure after the woven geotextile drainage layer and the supporting frame are plugged in; Fig. 9 for Figure 8A schematic diagram of the structure of the connection between the middle hand-shaped joint and the support frame after being plugged in; Fig.10 for Figure 8 Schematic diagram of the structure of the middle hand type joint; Fig.11 for Figure 6 Schematic diagram of the structure of the central extraction and discharge vertical pipe; Fig.12 for Fig.11 Schematic diagram of the partial cross-section structure after the central extraction and discharge vertical pipe is connected; Fig.13 for Figure 6 Another structural schematic diagram of the central extraction and discharge vertical pipe; Fig.14 for Fig.13 Schematic diagram of the partial cross-section structure after the central extraction and discharge vertical pipe is connected; Fig.15 for Figure 7 Schematic diagram of the local structure at the intersection of the middle strip frame. DETAILED DESCRIPTION

[0010] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0011] Reference Figure 1-5 As described above, the first embodiment of the present invention proposes a woven geotextile combined with vacuum preloading method to treat dredged soil system, including a dredged soil blowing and filling pool 1, a pumping and drainage pipeline system 2, a woven geotextile drainage layer 3 and a vacuum device 4. The dredged soil blowing and filling pool 1 is filled with dredged soil, and a plurality of woven geotextile drainage layers 3 are sequentially laid in the dredged soil at a certain interval, and the woven geotextile drainage layer 3 is connected to an external vacuum device through a plurality of hand-shaped joints through the pumping and drainage pipeline system 2. The woven geotextile covers the entire layer of dredged soil, and the vacuum degree can be transmitted to the entire dredged soil layer, which greatly increases the drainage area, improves the construction efficiency and drainage effect, reduces the construction difficulty and economic cost, and alleviates the uneven settlement problem caused by the traditional drainage board vacuum preloading foundation treatment process.

[0012] The woven geotextile drainage layer 3 is composed of multiple layers of woven geotextile layers stacked layer by layer, and the multiple layers of woven geotextile layers are connected by hand-shaped joints 6 after being stacked layer by layer. The multiple layers of woven geotextile layers form a woven geotextile drainage layer to form a dredged soil drainage channel. The dredged soil drainage channel adopts the method of multi-layer stacking of woven geotextiles, which increases the drainage channel and improves the drainage efficiency. Each layer of woven geotextile layer is composed of multiple layers of woven geotextiles 5, and the woven geotextile 5 is interwoven by weft yarns 51 and warp yarns 52. The warp yarns 51 and weft yarns 52 are interwoven to form multiple tissue cycles, and one tissue cycle is formed by 2 drainage yarns and 1 reinforcement yarn arranged in a regular pattern. The water-conducting reinforced geotextile is formed by using two yarns with different characteristics as weft yarns 52 and warp yarns 51, respectively, which have good strength, toughness and drainage, can be used as a construction platform, and can also accelerate the drainage rate. The non-continuous boundaries of the multiple layers of woven geotextiles stacked into woven geotextile layers are sealed by heat melting 11, which improves the vacuum transmission efficiency between the layers and reduces the probability of clogging of the drainage channel. At the same time, the process of sewing the drainage board and the geotextile by traditional vacuum preloading is omitted, which greatly improves the production efficiency. The woven geotextile layer is arranged in a wave shape near the end of the pumping and drainage pipeline system, so that the dredged soil drainage channel can be stretched laterally due to soil settlement.

[0013] The construction method of the woven geotextile combined with the vacuum preloading method for treating the dredged soil system has the following specific steps: S1. Excavate and fill pond 1 with dredged soil.

[0014] S2. Laying the extraction and drainage pipe system 2, the extraction and drainage pipe system consists of a plurality of vertical pipes 21 and horizontal branches 22, A plurality of vertical pipes 21 are respectively arranged on each side wall of the dredged soil blowing and filling pool, and each vertical pipe is sequentially connected with an L-shaped joint layer by layer in the height direction, and the L-shaped joint is used to connect the horizontal branch pipe 22. The vertical pipes are laterally inserted and fixed on the side wall of the dredged soil blowing and filling pool through a plurality of U-shaped forks, and the vertical pipe in the middle of each side wall is a vertical main pipe, and the other vertical pipes are connected to the vertical main pipe through pipelines.

[0015] S3. Prepare a woven geotextile layer, The woven geotextile is stacked in multiple layers, and after the stacking is completed, the non-connected boundaries at the edges are sealed by hot melting 11.

[0016] S4. Laying a geotextile drainage layer 3, The dredged soil blowing and filling device 7 blows the first layer of dredged soil, and then uses the foam platform to lay the first layer of woven geotextile. This layer of woven geotextile is stretched 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 laid; S5. Install a geotextile drainage layer. The geotextile drainage layer is cut out at the edge of the opening of the same size as the hand-shaped joint, the multi-layer geotextile is inserted into the hand-shaped joint 6, the hand-shaped joint is connected to the corresponding L-shaped joint through the transverse branch 22; S6. A geotextile drainage layer is laid in sequence. Blow the next layer of dredged soil into the dredged soil blowing pool 1. After each layer is blown, the operations S4 and S5 are repeated cyclically until the dredged soil in the dredged soil blowing pool reaches the required height. S7. Connect each vertical main pipe to the vacuum device, and use silt or cover the dredged soil layer with a sealing film and geotextile to form a sealed environment; S8. Turn on the vacuum device to remove water from the dredged soil.

[0017] Reference Figure 6-15 The second embodiment of the present invention proposes a woven geotextile combined with a vacuum preloading method to treat dredged soil, which is basically the same as the first embodiment, except that: a support frame is set in the dredged soil filling pool, and the support frame includes a bottom support frame 8 and a plurality of vertical support frames 9, and a plurality of vertical support frames 9 are evenly distributed on each side of the bottom support frame 8. The middle of both sides of the vertical support frame 9 are symmetrically inwardly concave 91, so that the inner cavity of the vertical support frame forms an inner slot 92, the outer wall of the vertical support frame forms an outer plug-in portion 93, and the front side of the vertical support frame 9 has a vertical strip hole 94.

[0018] The drainage pipe 2 is formed by connecting a plurality of vertical drainage pipes 23, and adjacent vertical drainage pipes are detachably connected. A transverse branch pipe 22 is provided on each vertical drainage pipe, and the transverse branch pipe 22 is located at the lower end of the drainage pipe. The outer wall of the vertical drainage pipe is provided with at least one limit slider 24 adapted to the inner slot, and the number of limit sliders is preferably two, one of which is provided at the upper end of the vertical drainage pipe, and the other is located between the transverse branch pipe and the upper limit slider. A plurality of hand-shaped joints 6 are evenly connected to the edge of the woven geotextile drainage layer, and a limit block 61 is arranged at the bottom of the hand-shaped joint, and a plug-in slot 62 is provided at the front end of the limit block, and a guide block 63 is arranged oppositely at the open end of the plug-in slot. When laying the woven geotextile drainage layer, first connect the hand-shaped joints 6 on the woven geotextile drainage layer to the horizontal branch pipe 22 of a vertical drainage pipe, then insert the vertical drainage pipe into the corresponding inner cavity of the vertical support frame, and the limit slider 24 of the vertical drainage pipe is inserted into the inner slot 92, and the horizontal branch pipe 22 passes through the vertical strip hole 94. At the same time, the plug-in slot 62 of the limit block is plugged into the outer plug-in portion 93 of the vertical support frame, that is, the guide block 63 of the plug-in slot is respectively inserted into the groove formed by the concave protrusion 91. The limit slider 24 of the vertical drainage pipe moves downward along the inner slot 92, and the plug-in slot 62 of the limit block moves downward along the outer plug-in portion 93, so that the vertical drainage 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 vertical drainage pipe 23 along the inner cavity of the vertical support frame to the upper surface of the dredged soil, workers do not need to enter the dredged soil filling pool to lay the woven geotextile drainage layer, which reduces the difficulty of work and increases the speed of laying. At the same time, during the drainage and consolidation process and the settlement of the soil, the bottom vertical drainage pipe continues to move downward along the inner cavity of the vertical support frame, and the auxiliary woven geotextile drainage layer moves downward with the settlement of the soil.

[0019] A plug-in portion 25 is provided at the bottom of the vertical pumping and draining pipe 23. The diameter of the plug-in portion 25 is smaller than the diameter of the vertical pumping and draining pipe. A sealing cushion layer 26 is provided on the outer wall of the plug-in portion. When the adjacent vertical pumping and draining pipes are connected, the plug-in portion of the vertical pumping and draining pipe is inserted into the inner cavity at the top end of the adjacent vertical pumping and draining pipe. A limiting convex edge 28 is provided at the connection between the plug-in portion and the vertical pumping and draining pipe. The transverse branch pipe 22 is located above the limiting convex edge 28. When the plug-in portion 25 is inserted into the top end of the adjacent vertical pumping and draining pipe, the limiting convex edge 28 abuts against the top end of the adjacent vertical pumping and draining pipe. The plug-in portion can also be 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 a plurality of limiting spring sheets 253. The upper ends of the second plug-in portion 252 and the first plug-in portion 251 are both provided with a self-expanding sealing cushion layer 26. The diameter of the first plug-in portion 251 is smaller than that of the second plug-in portion 252. An annular step surface 254 is formed between the first plug-in portion 251 and the second plug-in portion 252. The diameter of the second plug-in portion is smaller than the inner diameter of the vertical pumping and exhausting pipe. The inner cavity at the upper end of the vertical pumping and exhausting pipe has a convex edge 27. When adjacent vertical pumping and exhausting pipes are connected, the plug-in portion at the bottom of the vertical pumping and exhausting pipe is inserted into the inner cavity at the top end of the adjacent vertical pumping and exhausting pipe until the limiting spring piece passes through the convex edge 27 and abuts against the bottom of the convex edge, and the annular step surface abuts against the upper end surface of the convex edge, thereby completing the connection of the adjacent vertical pumping and exhausting pipes.

[0020] The construction method of the woven geotextile combined with the vacuum preloading method for treating the dredged soil system comprises the following steps: S1. Install the support frame in the dredged soil fill tank.

[0021] The support frame is placed in the dredged soil filling pool, and the vertical support frames 9 on the same side are fixedly connected by a cross bar 10, and the cross bar is laterally inserted and fixed on the side wall of the dredged soil filling pool through multiple U-shaped forks, and the bottom support frame 8 is installed at the bottom of the dredged soil filling pool.

[0022] The bottom mounting frame 8 is composed of a plurality of strip frames 81, and the adjacent strip frames are connected at their joints by a telescopic adjustment part. The telescopic adjustment part 82 is composed of a fixed part 821 and two telescopic sleeves 822. One end of the two telescopic sleeves 822 is connected to the fixed part 821, and the other ends of the two telescopic sleeves 822 are respectively sleeved in the inner cavity of the corresponding strip frame 81. In the contracted state, the telescopic sleeve 822 is placed in the inner cavity of the strip frame. When the bottom mounting frame 8 needs to be adjusted according to the position of the side wall of the dredged soil filling pool, the telescopic sleeve 822 is pulled out until the cross bar 10 on the vertical bracket abuts against the side wall of the dredged soil filling pool, and then the cross bar is fixed to the side wall of the dredged soil filling pool through a plurality of U-shaped forks.

[0023] S2. Install a geotextile drainage layer. A plurality of hand-shaped joints 6 are evenly connected to the edge of the woven geotextile drainage layer, and the horizontal branch pipe 22 on the vertical drainage pipe is connected to the hand-shaped joint 6. Each hand-shaped joint is connected to a vertical drainage pipe 23, wherein the bottom end of the bottom vertical drainage pipe has no opening, and the other vertical drainage pipes are in a hollow conductive state.

[0024] Specifically, multiple layers of woven geotextiles are stacked, and after stacking, the non-connected boundaries at the edges are sealed by hot melting to prepare a woven geotextile layer. Multiple layers of woven geotextiles are stacked layer by layer to form a woven geotextile drainage layer 3, and an opening of the same size as the hand-shaped joint is cut out at the edge of the woven geotextile drainage layer, and the multiple layers of woven geotextiles are inserted into the hand-shaped joint 6, and then the hand-shaped joint is connected to the horizontal branch pipe 22 of the vertical drainage standpipe.

[0025] S3. Lay the first layer of woven geotextile drainage layer, First, fill the first layer of dredged soil to the required height, insert each vertical pumping and drainage standpipe 23 into the corresponding vertical support frame, insert the limit slider 24 of the vertical pumping and drainage standpipe into the inner slot 92 of the vertical support frame, insert the plug-in slot 62 of the limit block at the bottom of the hand-shaped joint into the outer plug-in portion 93 of the vertical support frame, and move the limit slider 24 and the limit block 61 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 upper surface of the first layer of dredged soil; S4. Lay the second layer of woven geotextile drainage layer, The second layer of dredged soil is blown onto the upper surface of the first layer of woven geotextile drainage layer to the required height. The height of the second layer of dredged soil is to the position corresponding 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 downward 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 plug-in portion 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, thereby 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.

[0026] 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 to press down the vertical pipe. The plug-in part at the bottom of the vertical pipe is inserted into the inner cavity at the top end of the adjacent vertical pipe 23 to complete the connection between the vertical pipe of the first layer and the vertical pipe of the second layer.

[0027] S5. Lay the geotextile drainage layer in sequence, Blow the next layer of dredged soil into the dredged soil blowing pool. After each layer is blown, the S4 operation is repeated until the dredged soil in the dredged soil blowing pool reaches the required height. S6. The vertical pumping and drainage pipes of the dredged soil filling pool on each side are merged into one of the vertical pumping and drainage pipes through a branch pipe. The vertical pumping and drainage pipe is a vertical main pipe. Each vertical main pipe is connected to the vacuum device respectively, and a sealing environment is formed by covering the silt or the sealing film and geotextile above the dredged soil layer; S7. Turn on the vacuum device to remove water from the dredged soil.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dredged soil treatment system using a woven geotextile combined with a vacuum preloading method, characterized in that: It includes a dredged soil blowing and filling pool, a pumping and drainage pipeline system, a woven geotextile drainage layer and a vacuum device. The dredged soil blowing and 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 multiple layers of woven geotextile layers stacked layer by layer. The multiple layers of woven geotextile layers constitute a dredged soil drainage channel. The woven geotextile drainage layer is connected to an external vacuum device through a plurality of hand-shaped joints via the pumping and drainage pipeline system.

2. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 1 is characterized by: The woven geotextile layer is composed of multiple layers of woven geotextiles, which are interwoven with weft yarns and warp yarns. The warp yarns and weft yarns are interwoven to form multiple weave loops, and one weave loop is formed by regularly arranging two drainage yarns and one reinforcement yarn.

3. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 1 or 2, characterized in that: The discontinuous boundaries of the woven geotextile layers are sealed by heat fusion.

4. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 3, characterized in that: The woven geotextile layer is arranged in a wave shape near the end of the pumping and drainage pipe system.

5. A construction method for treating dredged soil system by using woven geotextile combined with vacuum preloading method according to claim 1, characterized in that: The steps are as follows, S1. Excavation of dredged soil filling pond; S2. Lay the extraction and drainage pipeline system, which consists of multiple vertical pipes and horizontal branches. A plurality of vertical pipes are respectively arranged on the side walls of the dredged soil filling pool, each of which is sequentially connected with an L-shaped joint layer by layer in the height direction, and the vertical pipes are laterally inserted and fixed on the side walls of the dredged soil filling pool through a plurality of U-shaped forks, the vertical pipe in the middle of each side wall is a vertical main pipe, and the other vertical pipes are connected to the vertical main pipe; S3. Prepare a woven geotextile layer, The woven geotextile is stacked in multiple layers, and after the stacking is completed, the non-connected edges at the edges are sealed by hot melting; S4. Lay a geotextile drainage layer. The dredged soil blowing and filling device blows the first layer of dredged soil, and then uses a foam platform to lay the first layer of woven geotextile, and then tensions and tightens this layer of woven geotextile to form the first construction platform, and then continues to lay multiple layers of woven geotextile to form a woven geotextile drainage layer, until the first layer of woven geotextile drainage layer is laid; S5. Install a geotextile drainage layer. An opening of the same size as the hand-shaped joint is cut out at the edge of the woven geotextile drainage layer, and the multi-layer woven geotextile is inserted into the hand-shaped joint, and the hand-shaped joint is connected to the corresponding L-shaped joint through a transverse branch pipe; S6. A geotextile drainage layer is laid in sequence. Blow the next layer of dredged soil into the dredged soil blowing pool. After each layer is blown, the S4 and S5 operations are repeated until the dredged soil in the dredged soil blowing pool reaches the required height. S7. Connect each vertical main pipe to the vacuum device, and use silt or cover the dredged soil layer with a sealing film and geotextile to form a sealed environment; S8. Turn on the vacuum device to remove water from the dredged soil.

6. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 1 is characterized by: A support frame is arranged in the dredged soil filling pool, and the support frame comprises a bottom support frame and a plurality of vertical support frames, and the vertical support frames are evenly distributed and installed on the bottom support frame, and the middle parts of both sides of the vertical support frames are symmetrically concave inwardly, so that the inner cavity of the vertical support frame forms an inner slot, and the outer wall of the vertical support frame forms an outer plug-in part, and the front side of the vertical support frame has a vertical strip hole, and the drainage pipeline is formed by connecting a plurality of vertical drainage pipes, and each vertical drainage pipe is provided with a horizontal branch pipe, and the outer wall of the vertical drainage pipe is provided with at least one limiting slider adapted to the inner slot, and when laying, the hand-shaped joints on the woven geotextile drainage layer are respectively connected with the horizontal branch pipe of a drainage vertical pipe, and then the drainage vertical pipe is inserted into the corresponding inner cavity of the vertical support frame, and the limiting slider is stuck in the inner slot, and the horizontal branch pipe passes through the vertical strip hole, and the drainage vertical pipe slides downward along the inner cavity of the vertical support frame to the specified position, so that the woven geotextile drainage layer is laid to the specified position.

7. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 6 is characterized by: A limit block is provided at the bottom of the hand-shaped joint, and a plug-in slot is provided at the front end of the limit block. The open end of the slot has a symmetrically arranged guide block. When a geotextile drainage layer is laid, the limit slider of the vertical drainage pipe is inserted into the inner slot of the vertical support frame and moves downward along the inner slot, and the plug-in slot of the limit block is plugged into the outer plug-in part of the vertical support frame and moves downward along the outer plug-in part.

8. The woven geotextile combined with vacuum preloading method for treating dredged soil according to claim 7 is characterized by: A plug-in portion is provided at the bottom of the vertical pumping and exhausting pipe, the diameter of which is smaller than the diameter of the vertical pumping and exhausting pipe, and a sealing cushion layer is provided on the outer wall of the plug-in portion. When adjacent vertical pumping and exhausting pipes are connected, the plug-in portion of the vertical pumping and exhausting pipe is inserted into the top inner cavity of the adjacent vertical pumping and exhausting pipe.

9. A construction method for treating a dredged soil system using a woven geotextile combined with a vacuum preloading method according to any one of claims 6 to 8, characterized in that: The steps are as follows, S1. Install the support frame in the dredged soil filling pool. The support frame is placed in the dredged soil blowing and filling pool, the vertical support frames on the same side are fixedly connected by a cross bar, the H cross bar is laterally inserted and fixed on the side wall of the dredged soil blowing and filling pool through a plurality of U-shaped forks, and the bottom support frame is installed at the bottom of the dredged soil blowing and filling pool; S2. Install a geotextile drainage layer. The edge of the woven geotextile drainage layer is evenly connected with a plurality of hand-shaped joints, the horizontal branch pipes on the vertical drainage pipes are connected with the hand-shaped joints, each hand-shaped joint is connected with a vertical drainage pipe, wherein the bottom end of the vertical drainage pipe at the bottom is not provided with an opening; S3. Lay the first layer of woven geotextile drainage layer, The dredged soil blowing and filling device blows the first layer of dredged soil to the required height, inserts each vertical pumping and drainage standpipe into the corresponding vertical support frame, inserts the limit slider of the vertical pumping and drainage standpipe into the inner slot of the vertical support frame, inserts the plug-in slot of the limit block at the bottom of the hand-shaped joint into the outer plug-in part of the vertical support frame, and moves the limit slider and the limit block 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 upper surface of the first layer of dredged soil; S4. Lay the second layer of woven geotextile drainage layer, Blow fill the second layer of dredged soil on the upper surface of the first layer of woven geotextile drainage layer to the required height, the height of the second layer of dredged soil is to the position corresponding to the top of the first layer of vertical drainage pipe, slide the drainage pipe of the second layer of woven geotextile drainage layer downward along the vertical support frame to the top of the first layer of drainage pipe, press down the second layer of drainage pipe through the external auxiliary device until the plug-in part 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, complete the connection between the first layer of drainage pipe and the second layer of drainage pipe, and lay the second layer of woven geotextile drainage layer on the second layer of dredged soil; S5. Lay the geotextile drainage layer in sequence, Blow the next layer of dredged soil into the dredged soil blowing pool. After each layer is blown, the S4 operation is repeated until the dredged soil in the dredged soil blowing pool reaches the required height. S6. The vertical pumping and drainage pipes of the dredged soil filling pool on each side are merged into one of the vertical pumping and drainage pipes through a branch pipe. The vertical pumping and drainage pipe is a vertical main pipe. Each vertical main pipe is connected to the vacuum device respectively, and a sealing environment is formed by covering the silt or the sealing film and geotextile above the dredged soil layer; S7. Turn on the vacuum device to remove water from the dredged soil.

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