High-efficiency dehydration and consolidation system and method for geotextile tube based on heating drainage plate

Abstract

The application discloses a kind of geotextile tube high-efficiency dehydration consolidation system and method based on heating drainage plate, including geotextile tube body, still include: set in the heating drainage plate unit of geotextile tube body inside, the heating drainage plate unit includes drainage plate core, filter membrane wrapped in drainage plate core outside and electric heating element inlaid or attached in drainage plate core;With the drainage outlet communication of the heating drainage plate unit Drainage main pipe;The electric heating element is electrically connected with external power supply by wire.The application can realize active heating to mud in bag by integrating internal heating and drainage function, thereby reducing the viscosity of water, destroying capillary action, accelerating water migration, ultimately achieving the effect of greatly shortening dehydration period and reducing final moisture content.

Description

Technical Field

[0001] This invention relates to the field of environmental geotechnical engineering technology, and in particular to a high-efficiency dewatering and consolidation system and method for geotextile bags based on a heated drainage board. Background Technology

[0002] Geotextile bags are tubular containers made of high-strength geotextile fabric and are widely used in river dredging, sludge dewatering in sewage treatment plants, and industrial slurry and tailings treatment. Their working principle is as follows: slurry with extremely high water content is pumped into the bag. Utilizing the filtration properties of the geotextile, water seeps out under gravity, while solid particles are retained inside the bag, thus achieving mud-water separation and volume reduction.

[0003] However, according to the "Technical Specification for Application of Geosynthetics" (GB / T 50290), traditional drainage boards only serve as passive drainage channels and cannot actively intervene in the drainage process. This results in low dewatering efficiency in the treatment of fine-grained soils. Traditional geotextile bag technology has the following significant drawbacks:

[0004] 1. Low dewatering efficiency and long cycle: Relying solely on natural gravity for drainage, the dewatering process for fine-particle mud with extremely poor permeability is very slow, often requiring weeks or even months, and occupying a large amount of space.

[0005] 2. Incomplete dehydration, resulting in high final moisture content: Gravity drainage can only remove free water, and it is difficult to remove capillary bound water and adsorbed water, resulting in a high moisture content and low strength of the soil after dehydration, making subsequent treatment or resource utilization difficult.

[0006] 3. Highly affected by environmental climate: In low temperature, high humidity or rainy weather, the efficiency of natural evaporation and drainage is further reduced, resulting in great uncertainty in the project cycle.

[0007] To accelerate dehydration, existing technologies include adding flocculants, using vacuum preloading, or applying pressure to the outside of the geotextile bag. However, each of these methods has its drawbacks: flocculants may alter soil properties and increase costs; vacuum preloading systems are complex, require high sealing standards, and consume a lot of energy; and external pressure may damage the geotextile bag structure.

[0008] Therefore, there is an urgent need for a new dehydration and consolidation technology that can actively and efficiently drive water out of the inside of geotextile bags, and that is simple in system and has controllable energy consumption. Summary of the Invention

[0009] To address the shortcomings of the existing technologies, the technical problem to be solved by this invention is to propose a high-efficiency dewatering and consolidation system and method for geotextile bags based on a heated drainage board. This system integrates internal heating and drainage functions to actively heat the mud inside the bag, thereby reducing the viscosity of water, disrupting capillary action, and accelerating water migration, ultimately achieving the effect of significantly shortening the dewatering cycle and reducing the final moisture content.

[0010] One technical solution adopted in this invention is: a high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board, comprising a geotextile tube bag body, and further comprising:

[0011] The heating and drainage board unit is installed inside the geotextile bag body. The heating and drainage board unit includes a drainage board core, a filter membrane wrapped around the drainage board core, and an electric heating element embedded or attached to the drainage board core.

[0012] A main drain pipe connected to the drain outlet of the heated drain plate unit;

[0013] The heating element is electrically connected to an external power source via a wire.

[0014] Furthermore, the heating element is a flexible heating element, selected from one of carbon fiber heating wire, metal alloy heating wire, or polymer PTC heating material.

[0015] Furthermore, it also includes an intelligent control module, which comprises:

[0016] A temperature control power supply, connected to the wire, is used to supply power to the heating element and control its heating power.

[0017] At least one temperature sensor is installed inside the geotextile bag body;

[0018] An instantaneous flow meter is installed at the outlet of the main drainage pipe;

[0019] The central controller is electrically connected to the temperature control power supply, temperature sensor, and instantaneous flow meter.

[0020] Furthermore, the central controller is configured to acquire signals from the temperature sensor and the instantaneous flow meter in real time, and to control the power of the temperature control power supply according to a preset heating strategy.

[0021] Furthermore, the preset heating strategy includes:

[0022] No heating is performed within the first preset time after the mud filling is completed;

[0023] Heat at the first heating rate until the mud temperature reaches the first preset temperature;

[0024] Maintain the first preset temperature;

[0025] If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature.

[0026] When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature.

[0027] Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

[0028] Furthermore, the preset heating strategy also includes:

[0029] When the mud temperature exceeds the third preset temperature, the power is cut off directly to stop heating.

[0030] Furthermore, several of the heating and drainage board units are evenly distributed within the geotextile bag body.

[0031] Furthermore, it also includes a junction box, which has several parallel branches, each of which connects to one or more parallel heating and drainage board units.

[0032] The second technical solution adopted in this invention is a method for efficient dewatering and consolidation of geotextile bags based on heated drainage boards, which includes the following steps:

[0033] S1: Level the site, lay the base layer, and unfold and flatten the geotextile bag body;

[0034] S2: Inside the laid geotextile bag, heat-drainage board units are laid out in parallel at the designed intervals, and their wires and drainage outlets are led out in advance;

[0035] S3: Pump the flocculated and conditioned mud into the geotextile bag so that the mud evenly coats the heated drainage board unit;

[0036] S4: Start dehydration and solidification, so that the central controller heats according to the preset heating strategy.

[0037] Furthermore, the preset heating strategy includes:

[0038] No heating is performed within the first preset time after the mud filling is completed;

[0039] Heat at the first heating rate until the mud temperature reaches the first preset temperature;

[0040] Maintain the first preset temperature;

[0041] If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature.

[0042] When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature.

[0043] Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

[0044] The present invention provides a highly efficient dewatering and consolidation system and method for geotextile tube bags based on a heated drainage board, which has at least the following beneficial effects:

[0045] 1. Revolutionary Improvement in Dehydration Efficiency: Through internal active heating, the traditional passive gravity-based drainage method is fundamentally changed. Heating significantly reduces the dynamic viscosity coefficient of water, accelerating the flow rate of water in soil pores and drainage boards; at the same time, thermal energy helps break the physicochemical bonds between water and fine particles, converting some of the bound water that is difficult to drain into free water, thereby shortening the dehydration cycle by several times.

[0046] 2. More thorough dehydration and better consolidation: Because more bound water can be discharged, the moisture content of the final solidified soil is significantly lower than that of traditional methods, resulting in higher soil strength and better volume stability, which creates more favorable conditions for subsequent resource utilization such as landfill, sintering for brick making or roadbed filling.

[0047] 3. High system integration and convenient construction: The heating and drainage board unit integrates the two major functions of "drainage" and "heating" into one compact structure. It can be laid out in one go before the geotextile bag is filled, without the need for complicated external pressurization or vacuum equipment. The construction process is simple and easy to scale up.

[0048] 4. Highly efficient and controllable energy utilization: Heat is generated directly from within the mud, resulting in minimal heat loss and high energy efficiency. An intelligent temperature control system enables precise temperature management, preventing energy waste and protecting the geotextile or floc structure from excessive heat, ensuring a safe, stable, and efficient dewatering process.

[0049] 5. Strong environmental adaptability: This technology is less affected by external environmental temperature and humidity, and is particularly suitable for construction in cold northern regions or during the rainy season. It can ensure project progress and expand the application area and season of geotextile bag technology. Attached Figure Description

[0050] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0051] Figure 1 This is a schematic diagram of a high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board, according to the present invention.

[0052] Figure 2 This is a schematic diagram of the cross-sectional structure of the heated drainage board unit.

[0053] Figure 3 A schematic diagram showing the connection layout of the central controller.

[0054] Figure 4 This is a flowchart of a method for efficient dewatering and consolidation of geotextile tubes based on a heated drainage board according to the present invention.

[0055] Explanation of reference numerals in the attached figures

[0056] 1-Geotextile bag body, 2-Slurry filling port, 3-Heated drainage board unit, 31-Drainage board core, 32-Filter membrane, 33-Heating element, 34-Wire, 4-Drainage main pipe, 5-Collection well, 6-Temperature control power supply, 7-Central controller, 8-Temperature sensor, 9-Instantaneous flow meter. Detailed Implementation

[0057] The invention will now be further described with reference to the accompanying drawings.

[0058] Please see Figure 1 This is a schematic diagram of a high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board, according to the present invention. The system includes a geotextile tube bag body 1, and further includes:

[0059] The heating and drainage board unit 2 is installed inside the geotextile bag body 1. The heating and drainage board unit 2 includes a drainage board core 31, a filter membrane 32 wrapped around the drainage board core 31, and an electric heating element 33 embedded or attached to the drainage board core 31.

[0060] A main drain pipe 4 is connected to the drain outlet of the heated drain plate unit 2;

[0061] The heating element 33 is electrically connected to an external power source via a wire 34.

[0062] The geotextile bag body 1 is made of high-strength geotextile that is permeable to water but impermeable to soil. It is tubular or bag-shaped and has a mud filling port 2.

[0063] Please see Figure 2 The heating and drainage board units 2 are arranged in parallel at intervals inside the geotextile bag body 1.

[0064] In some embodiments, to ensure uniform heating of the slurry inside the geotextile bag body 1, several heating and drainage board units 2 are evenly distributed within the geotextile bag body 1. Furthermore, the long side of the heating and drainage board units 2 is arranged parallel to the longitudinal axis of the geotextile bag body 1 (i.e., the filling flow direction). This avoids bending of the drainage path due to transverse arrangement and facilitates segmented temperature control along the length of the geotextile bag body 1. Additionally, a symmetrical arrangement is adopted, with the vertical center axis of the cross-section of the geotextile bag body 1 as a reference, ensuring uniform heating and drainage. It is worth noting that this embodiment is applicable to flat elliptical or rectangular geotextile bags with a height ≤1m and parallel spacing between drainage boards. Longitudinally, the drainage board core 31 is arranged along the entire length of the geotextile bag; transversely, the drainage board core 31 should penetrate to within 1 / 2 the thickness of the geotextile bag body 1, while ensuring that the top and edges of the board are at least 0.2m away from the filter membrane 32 of the geotextile bag to avoid puncture.

[0065] Specifically, the heated drainage board unit 2 includes:

[0066] Drainage board core 31: A porous three-dimensional channel structure made of plastic, used to form an internal channel through which water flows.

[0067] Filter membrane 32: Non-woven geotextile wrapped around the drainage board core 31 for permeable soil filtration.

[0068] Heating element 33: Embedded within the drainage plate core 31, used to generate heat after being energized; the heating element 33 is a flexible structure, specifically selected from one of heating wire, carbon fiber heating wire, or metal alloy heating wire. Specifically, the heating element 33 is a flexible heating element, selected from one of carbon fiber heating wire, metal alloy heating wire, or polymer PTC heating material.

[0069] Wire 34: Connected to the heating element 33 and extending out of the geotextile bag body 1, for connection to the external temperature control power supply 6.

[0070] Drainage main pipe 4 and water collection system: Connected to the end outlet of the heated drainage board unit 2, it collects water flowing from each drainage board and discharges it to a designated location. Furthermore, a hierarchical and zoned topology can be adopted between multiple heated drainage board units 2 and drainage main pipe 4. The upper end of each heated drainage board unit 2 is connected to a longitudinal drainage branch pipe via a flexible corrugated hose no longer than 0.25m. Both ends of the corrugated hose are equipped with quick connectors for easy installation and maintenance. Multiple longitudinal branch pipes then converge into drainage main pipe 4 (transverse water collection pipe) (usually DN50~DN80) via tee connectors. The transverse water collection pipe is arranged perpendicular to the pipe bag axis at the end or middle of the pipe bag, ultimately converging into the main collection well pipe. The entire drainage pipeline system adopts a branched hierarchical topology, i.e., "Heated drainage board unit 2 → Longitudinal branch pipe → Drainage main pipe 4 (transverse water collection pipe) → Main collection well pipe".

[0071] In some embodiments, the system may further include a junction box containing several parallel branches, each of which connects to one or more parallel heating and drainage board units 2. The multiple heating and drainage board units 2 can be connected to the power supply in a partitioned parallel, trunk-line power supply topology to achieve an optimal balance between power supply reliability and fault isolation. Specifically, a main armored cable is led out from the external power cabinet and laid along one longitudinal side of the geotextile bag, with a waterproof junction box (IP67 protection rating) installed. The junction box serves as a power supply partition node (if the actual length of the geotextile bag is long, a junction box can be installed every 5-10 meters). Inside the junction box, the main cable branches into several parallel branches, each branch independently connecting to one heating and drainage board unit 2. The heating boards within each branch are connected in parallel to ensure that a failure of a single heating board will not cause the entire branch to fail. Each heating and drainage board unit 2, according to its configuration, leads out a heat-resistant waterproof cable, which is then fixed along the edge of the drainage board after exiting the waterproof wiring cavity at the top of the heating board to avoid blocking the drainage channel.

[0072] This topology incorporates a multi-level protection mechanism to enhance system reliability. Each junction box houses miniature circuit breakers for different branches; when a branch is overloaded or short-circuited, only that branch is de-energized, without affecting other branches or the entire zone. Simultaneously, each heated drainage board unit 2 has a built-in thermal fuse and a resettable thermal switch within its wiring cavity, providing dual overheat protection at the board level: the thermal switch automatically trips when the temperature exceeds 60°C and automatically resets when the temperature drops to 50°C; if the temperature continues to rise above 60°C and shows an upward trend, the thermal fuse permanently melts, preventing overheating damage to the filter membrane 32 or the mud structure. All cables employ a double-sealing measure—waterproof cable joints with sealant—at their exit points from the geotextile tubes to prevent backflow of muddy water along the cables. This "zoned power supply, graded protection" topology design ensures that a single point of failure does not affect overall system operation, significantly improving overall availability.

[0073] Please see Figure 3 In some embodiments, the system further includes an intelligent control module, which includes:

[0074] Temperature control power supply 6 is connected to the wire 34 and is used to supply power to the heating element 33 and control its heating power.

[0075] At least one temperature sensor 8 is installed inside the geotextile bag body 1;

[0076] An instantaneous flow meter 9 is installed at the outlet of the main drainage pipe 4;

[0077] The central controller 7 is electrically connected to the temperature control power supply 6, the temperature sensor 8, and the instantaneous flow meter 9.

[0078] The central controller 7 is configured to collect signals from the temperature sensor 8 and the instantaneous flow meter 9 in real time, and to control the power of the temperature control power supply 6 according to a preset heating strategy.

[0079] The preset heating strategy includes:

[0080] No heating is performed within the first preset time after the mud filling is completed;

[0081] Heat at the first heating rate until the mud temperature reaches the first preset temperature;

[0082] Maintain the first preset temperature;

[0083] If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature.

[0084] When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature.

[0085] Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

[0086] In some embodiments, the preset heating strategy may further include:

[0087] When the mud temperature exceeds the third preset temperature, the power is cut off directly to stop heating.

[0088] Please see Figure 4The above is a flowchart of a method for efficient dewatering and consolidation of geotextile tubes based on a heated drainage board according to the present invention. The present invention also provides a method for efficient dewatering and consolidation of geotextile tubes based on a heated drainage board, which is used in the above-mentioned efficient dewatering and consolidation system for geotextile tubes based on a heated drainage board. The method includes the following steps:

[0089] S1: Level the site, lay the base layer, and unfold and flatten the geotextile bag body 1;

[0090] S2: Inside the laid geotextile tube, heat-drainage board units 2 are arranged in parallel at the designed spacing, and their conductors 34 and drainage outlets are pre-leaded out. Steps S1 and S2 are preliminary preparations. Specifically, inside the geotextile tube body 1, four heat-drainage board units 2 are arranged in parallel along the length direction, with a spacing of 1.0 meter. The long side of the heat-drainage board unit 2 is arranged parallel to the longitudinal axis of the geotextile tube body 1, and is symmetrically arranged on both sides with the vertical center axis of the cross-section of the geotextile tube body 1 as the reference.

[0091] The heating and drainage board unit 2 is arranged longitudinally along the length of the geotextile tube body 1; radially, it extends into the geotextile tube body 1 to a depth of 1 / 2 of its thickness, and the top and edge of the board are ≥0.2m away from the filter membrane 32 of the tube.

[0092] The heating element 33 is arranged on the outer edge of the interrib channels on both sides of the drainage plate core 31, maintaining a distance of at least 2 mm from the central drainage cavity of the drainage plate core 31. In the depth direction of the drainage plate core 31, the heating element 33 is arranged along the entire length from the top to the bottom of the plate, but a 0.2 m unheated area is reserved at each end. Furthermore, a 0.2 mm thick heat-diffusing aluminum foil layer is added between the heating element and the drainage ribs.

[0093] The electrical connection adopts a "zoned parallel, trunk power supply" topology. A main armored cable is led out from the external power cabinet and laid along one longitudinal side of the geotextile bag body 1, with a waterproof junction box (IP67 protection level) installed. The junction box serves as a power supply zone node (if the actual laying length of the geotextile bag is long, a junction box can be installed every 5-10 meters). Inside the junction box, the main cable branches into several parallel branches, each branch independently connecting to one or more parallel heating and drainage board units 2.

[0094] Each junction box contains a miniature circuit breaker for each branch circuit; each heating and drainage board unit 2 has a built-in temperature fuse and a resettable thermal switch (it disconnects when the temperature exceeds 3 degrees Celsius and resets when the temperature drops to 2 degrees Celsius). All cables exiting the geotextile conduit are double-sealed with waterproof cable joints and sealant.

[0095] The wires 34 and the drain outlet of each heating and drainage plate unit 2 are led out from both ends of the tube bag, and the wires 34 are connected to the temperature control power supply 6.

[0096] The drainage system adopts a "graded confluence and zoned collection" topology. The upper end of each heated drainage board unit 2 is connected to the longitudinal drainage branch pipe through a flexible corrugated hose with a length not exceeding 0.25m. Multiple longitudinal branch pipes then converge into the main drainage pipe 4 (transverse water collection pipe, DN50~DN80) through a tee joint. The end of the main drainage pipe 4 is connected to the water collection well 5.

[0097] Furthermore, three layers of temperature sensors 8 are arranged inside the geotextile bag body 1, consisting of upper, middle, and lower layers.

[0098] Install an instantaneous flow meter 9 at the outlet of the main drainage pipe 4.

[0099] The temperature sensor 8, the instantaneous flow meter 9, and the temperature control power supply 6 are all connected to the central controller 7 to form a closed-loop control system.

[0100] S3: Pump the flocculated and conditioned mud into the geotextile bag to evenly coat the heated drainage board unit 2; in this S3 step, the pretreated sludge is injected into the geotextile bag body 1 through the mud filling port 2 via a pumping system. The filling process is slow and uniform to ensure that the mud fully coats each heated drainage board unit 2.

[0101] S4: Start dehydration and solidification, so that the central controller 7 heats according to the preset heating strategy.

[0102] The control scheme in this embodiment is not based solely on temperature feedback, but rather employs a multi-parameter comprehensive feedback logic with drainage rate as the core and temperature and time as safety boundaries. This is because the drainage rate directly reflects the actual dewatering efficiency of the slurry under current conditions and is the most direct indicator for judging the consolidation process; temperature feedback is used to prevent material overheating damage and ensure safe heat transfer, while time feedback is used to ensure the integrity of each process stage. Specifically, the system collects three types of parameters in real time: temperature sensor data from each zone, the drainage main pipe 4 and its instantaneous and cumulative flow rates, and the duration of the current heating stage. The control program performs calculations every minute and dynamically adjusts the heating power and stage switching according to preset multi-parameter judgment rules. In some embodiments, the preset heating strategy includes:

[0103] No heating is performed within the first preset time after the mud filling is completed;

[0104] Heat at the first heating rate until the mud temperature reaches the first preset temperature;

[0105] Maintain the first preset temperature;

[0106] If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature.

[0107] When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature.

[0108] Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

[0109] Specifically, the heating process and phased temperature control are initiated as follows: After filling is completed, the central controller 7 executes the following phased temperature rise control strategy:

[0110] Preheating and waiting stage: After the mud filling is completed, no heating is carried out, and the process is allowed to wait for the first preset time (0.5 to 1 hour).

[0111] Rapid heating stage: Full power heating is used, and the heating slope is controlled not to exceed the first heating rate (5℃ / hour) to raise the mud temperature to the first preset temperature.

[0112] Constant temperature maintenance stage: The target temperature is controlled within the range of (first preset temperature ±1)℃, and the constant temperature is maintained with low power, with drainage flow rate as the main evaluation index.

[0113] High-temperature enhancement stage: When the cumulative drainage volume exceeds the first preset drainage volume threshold (40%) or the constant temperature holding time exceeds the second preset time (6 hours), the temperature is increased to the second preset temperature at the second heating rate (gradient of 2℃ / hour).

[0114] Waste heat drainage stage: After the heating stop condition is triggered, power is no longer supplied, and waste heat is used to continue drainage.

[0115] Emergency protection: When the temperature at any point exceeds the third preset temperature (around 70℃), the system will immediately cut off the power and sound an alarm.

[0116] Collaborative drainage: After heating, the free water in the mud migrates to the heated drainage plate unit 2, enters the drainage plate core 31 channel through the filter membrane 32, flows into the drainage main pipe 4, and finally flows into the collection well 5.

[0117] During the dehydration process, the transition between heating and dehydration stages does not rely on a single indicator, but rather on a multi-parameter integrated logic based primarily on the drainage rate, combined with temperature as a safety boundary and time as a lower limit protection. Specifically:

[0118] 1. Dominant condition: Drainage rate

[0119] The system collects data on the temperature, drainage flow rate, and duration of each zone in real time, with a cycle of one minute. During each heating phase, if the average drainage rate across the entire field remains above 60% of the initial peak flow rate, the mud drainage capacity is considered good, and the system maintains the current phase unchanged. During the constant temperature maintenance phase, once any condition for stopping heating is met, the system determines that the main body dewatering is basically complete and transitions to a cooling and shutdown preparation state.

[0120] 2. Safety boundary: Temperature control

[0121] Set the third preset temperature as the absolute upper limit.

[0122] The maximum heating rate is limited in stages (e.g., the first heating rate is 5℃ / h and the second heating rate is 2℃ / h).

[0123] If the temperature of any zone exceeds the third preset temperature, or the actual heating rate exceeds the preset value, the system will not advance to a higher temperature stage, but will extend the current stage or maintain a stable temperature to prevent thermal shock from damaging the filter membrane 32 or the mud structure.

[0124] 3. Lower limit protection: Time condition

[0125] Each heating stage has a minimum dwell time (e.g., the first preset temperature stage lasts for 6 hours) to ensure the basic processing time and avoid affecting the dehydration effect due to premature switching.

[0126] The central controller 7 displays the temperature, drainage flow rate, and cumulative drainage volume in real time. The drainage flow rate is recorded once per hour.

[0127] The system stops heating when any of the following conditions are met:

[0128] Within the fourth preset time period (12 consecutive hours), the drainage volume shall not exceed the first preset drainage volume, which is 5% of the initial drainage volume (the average flow rate in the second hour after mud filling is completed);

[0129] The cumulative drainage volume reaches 92% of the second preset drainage volume, which is the theoretical dewaterable volume (initial moisture content × 0.85), and the drainage rate is lower than the first preset drainage rate (0.2 liters / minute) during the fourth preset time (6 consecutive hours).

[0130] After heating is stopped, the system enters the natural cooling and residual water drainage stage, and the surface settlement and morphological changes of the geotextile bag are continuously monitored.

[0131] Therefore, the entire system's operation can be summarized into six stages: "deployment—filling—heating—drainage—monitoring—curing." In actual engineering projects, the heating temperature, deployment spacing, and drainage path can be flexibly adjusted according to the mud properties, environmental conditions, and dewatering targets to achieve optimized system operation.

[0132] The above description merely illustrates preferred embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this invention should be determined by the appended claims.

Claims

1. A high-efficiency dewatering and consolidation system for geotextile tube bags based on heated drainage boards, comprising a geotextile tube bag body, characterized in that, Also includes: The heating and drainage board unit is installed inside the geotextile bag body. The heating and drainage board unit includes a drainage board core, a filter membrane wrapped around the drainage board core, and an electric heating element embedded or attached to the drainage board core. A main drain pipe connected to the drain outlet of the heated drain plate unit; The heating element is electrically connected to an external power source via a wire.

2. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 1, characterized in that, The heating element is a flexible heating element, selected from one of carbon fiber heating wire, metal alloy heating wire, or polymer PTC heating material.

3. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 1 or 2, characterized in that, It also includes an intelligent control module, which comprises: A temperature control power supply, connected to the wire, is used to supply power to the heating element and control its heating power. At least one temperature sensor is installed inside the geotextile bag body; An instantaneous flow meter is installed at the outlet of the main drainage pipe; The central controller is electrically connected to the temperature control power supply, temperature sensor, and instantaneous flow meter.

4. The efficient dewatering and consolidation method for geotextile tube bags based on heated drainage boards as described in claim 3, characterized in that, The central controller is configured to acquire signals from the temperature sensor and the instantaneous flow meter in real time, and to control the power of the temperature control power supply according to a preset heating strategy.

5. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 4, characterized in that, The preset heating strategy includes: No heating is performed within the first preset time after the mud filling is completed; Heat at the first heating rate until the mud temperature reaches the first preset temperature; Maintain the first preset temperature; If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature. When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature. Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

6. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 5, characterized in that, The preset heating strategy also includes: When the mud temperature exceeds the third preset temperature, the power is cut off directly to stop heating.

7. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 1, characterized in that, Several of the heating and drainage board units are evenly distributed within the geotextile bag body.

8. The high-efficiency dewatering and consolidation system for geotextile tube bags based on a heated drainage board as described in claim 7, characterized in that, It also includes a junction box, which has several parallel branches, each of which is connected to one or more parallel heating and drainage board units.

9. A method for efficient dewatering and consolidation of geotextile tubes based on a heated drainage board, used in the efficient dewatering and consolidation system for geotextile tubes based on a heated drainage board as described in any one of claims 1-8, characterized in that, The method includes the following steps: S1: Level the site, lay the base layer, and unfold and flatten the geotextile bag body; S2: Inside the laid geotextile bag, heat-drainage board units are laid out in parallel at the designed intervals, and their wires and drainage outlets are led out in advance; S3: Pump the flocculated and conditioned mud into the geotextile bag so that the mud evenly coats the heated drainage board unit; S4: Start dehydration and solidification, so that the central controller heats according to the preset heating strategy.

10. The efficient dewatering and consolidation method for geotextile bags based on a heated drainage board as described in claim 9, characterized in that, The preset heating strategy includes: No heating is performed within the first preset time after the mud filling is completed; Heat at the first heating rate until the mud temperature reaches the first preset temperature; Maintain the first preset temperature; If the first preset temperature is maintained for more than the second preset time, or the cumulative drainage volume exceeds the first preset drainage volume threshold, the mud is heated at the second heating rate until the mud temperature reaches the second preset temperature. When the mud temperature reaches the third preset temperature, reduce the heating power until the mud temperature reaches the second preset temperature. Heating will stop if the drainage volume does not exceed the first preset drainage volume within the third preset time period, or if the cumulative drainage volume reaches the second preset drainage volume and the drainage rate is lower than the first preset drainage rate within the fourth preset time period.

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