Construction and use method of construction waste impervious net

Abstract

The application discloses a construction and use method of a building waste anti-seepage net, which comprises the following steps: curling hollow pipe materials with multiple openings into a spring shape, uniformly laying the hollow pipe materials around and at the bottom of a waste field through a spiral drilling machine to form a spiral pipe net, pouring high-polluted water absorption composite fibers into the spiral pipe through a pressure machine, arranging a thick pipe at a position where the spiral pipe is exposed to the ground, arranging high water absorbency resin in the thick pipe, arranging a sensor on the thick pipe, opening a water pump when a pollution index exceeds a standard, and extracting seepage liquid absorbed by the high-polluted water absorption composite fibers at the bottom to prevent the seepage liquid of the building waste from seeping into the soil; when it is detected that the high-polluted water absorption composite fibers and the high water absorbency resin are aged or have a decreased water absorption performance, one end of the high-polluted water absorption composite fibers is hooked out with an iron hook, and the other end of the high-polluted water absorption composite fibers is hung with new water absorption fibers to enter the spiral pipe, so that the durability of the anti-seepage net structure is realized, the anti-seepage wall does not need to be excavated or recast like a traditional anti-seepage wall, and the anti-seepage net has the characteristics of sustainability, green environmental protection, low cost and strong environmental adaptability.

Description

TECHNICAL FIELD

[0001] The application relates to a construction and use method of a building waste anti-seepage net, and belongs to the technical field of building waste anti-seepage treatment. BACKGROUND

[0002] Daily garbage is increasing in the daily operation process of a city, and in the landfill process of the daily garbage in the city, due to the complex content of components in the garbage, environmental pollution disasters in the later period are prone to occur, and due to the fact that the daily garbage contains a large amount of harmful indicators, if the content of harmful substances such as heavy metals, total nitrogen and total phosphorus exceeds the standard, ecological pollution will be caused to the surrounding soil and land.

[0003] A traditional building waste protection method generally establishes an effective anti-seepage system, establishes an anti-seepage wall / curtain and the like, establishes a structure such as an anti-seepage wall around the garbage site, increases the length of a seepage path, and then causes seepage liquid to be adsorbed by the anti-seepage material, effectively improves the permeability coefficient of the site, and effectively prevents liquid of the building waste from seeping out, which is also the most commonly used method at present.

[0004] And the anti-seepage material is mostly ordinary bentonite and water reducing agent to improve the performance of the anti-seepage wall, due to long-term piling and decomposition of the garbage in the garbage landfill site, the permeability of the anti-seepage wall gradually decreases with time, the bentonite is gradually eroded and decomposed by the seepage liquid formed by the building waste, and the anti-seepage performance is greatly reduced.

[0005] And the construction of the anti-seepage wall mostly adopts the method of mixing and grouting, so that the bottom and the surrounding stratum of the building waste need to be disturbed and constructed in the construction process, which is easy to cause environmental damage, and the main components in the used slurry contain chemical components such as water reducing agent, which is easy to cause secondary environmental pollution. SUMMARY

[0006] The technical problem to be solved by the application is to provide a construction and use method of a building waste anti-seepage net which is sustainable, green, environmentally friendly, low in cost and high in environmental adaptability in view of the shortcomings of the existing anti-seepage system of a city daily garbage landfill site.

[0007] The technical scheme adopted by the application to solve the technical problem is as follows:

[0008] A construction and use method of a building waste anti-seepage net, comprising the following steps:

[0009] ①A silk-like hollow pipe material is curled into a spring-shaped spiral pipe structure, and openings are arranged on the spiral pipe every 0.01 m, the diameter of the spiral pipe is about 0.05 m, the strength reaches 100 kPa, and the length is set according to the construction site of the building waste;

[0010] ②In the early stage of construction of the landfill, a spiral drill is used to evenly lay spiral pipes around and at the bottom of the landfill to form a spiral pipe network structure;

[0011] ③After the spiral pipe network is laid, a pressure machine is used to pour high-polluted water absorption composite fiber A into the spiral pipe to form a polluted water seepage prevention network;

[0012] ④At the position where the spiral pipe is exposed to the ground, a coarse pipe is arranged for connection, and high water absorbent resin B is arranged in the coarse pipe, and the high water absorbent resin B is connected to the high-polluted water absorption composite fiber A in the spiral pipe;

[0013] ⑤A plurality of sensors are arranged on the coarse pipe on the ground to monitor the pollutant index of the high water absorbent resin B in real time;

[0014] ⑥A water pump is arranged on the other side of the coarse pipe, and when the pollutant index of the high water absorbent resin B exceeds the standard, the water pump is opened to extract the seepage liquid absorbed by the high-polluted water absorption composite fiber A through the polluted water seepage prevention network composed of the underground spiral pipe, so as to prevent the seepage liquid of the construction waste from seeping into the soil;

[0015] ⑦When it is detected that the high-polluted water absorption composite fiber A and the high water absorbent resin B are aged or have a reduced water absorption performance, an iron hook is used to hook the water absorption resin and the fiber on both sides of the pipe respectively, the water absorption resin and the fiber are hooked out by pulling one end of the iron hook, and an iron wire is connected to the other end of the iron hook;

[0016] ⑧The new water absorption fiber is hung on the iron wire, and the new water absorption fiber is pulled into the spiral pipe by pulling the iron wire, so that the durability of the seepage prevention network structure is realized, and the seepage prevention wall does not need to be excavated or recast like the traditional seepage prevention wall.

[0017] In step ③, the high-polluted water absorption composite fiber A is composed of seaweed fiber C with heavy metal ion adsorption capacity, activated carbon fiber D with nitrogen and phosphorus element absorption capacity, and high water absorption wet fiber E, and the weight ratio of the seaweed fiber C, the activated carbon fiber D and the high water absorption wet fiber E is 1:1:8, the high water absorption wet fiber E is the main shaft, and the seaweed fiber C and the activated carbon fiber D are interlaced and wound on the high water absorption wet fiber E to form the high-polluted water absorption composite fiber A.

[0018] The seaweed fiber C with heavy metal ion adsorption capacity is a kind of natural high molecular functional fiber which is made of sodium alginate extracted and processed from kelp as a basic raw material through spinning processing, and a large number of hydroxyl and carboxyl functional groups exist on the surface of the seaweed fiber C, and these functional groups can form a complex with heavy metals, so that the heavy metal ions are adsorbed on the surface of the material; the seaweed fiber C has the characteristics of long fiber length, high strength, strong flexibility, strong absorption capacity and pure natural production raw material.

[0019] The preparation method of the active carbon fiber D for absorbing nitrogen and phosphorus elements is as follows:

[0020] (1) Raw materials: polyacrylonitrile fiber, hydrogen peroxide gas;

[0021] (2) Oxidation treatment: sufficient hydrogen peroxide gas is introduced into the polyacrylonitrile fiber for oxidation treatment. The structure of the polyacrylonitrile fiber is gradually stabilized during the oxidation process, and the polyacrylonitrile oxidized fiber with high thermal stability and carbonization rate is formed;

[0022] (3) Carbonization treatment: the polyacrylonitrile oxidized fiber is subjected to carbonization treatment at a high temperature of 1150-1250°C for 1-2 hours to form carbon fiber;

[0023] (4) Heat treatment: the carbon fiber after carbonization is subjected to further heat treatment at a high temperature of 2450-2600°C to remove impurities in the internal structure of the carbon fiber and make the structure more stable;

[0024] (5) Adhesive treatment: the carbon fiber is subjected to surface treatment, and the porous structure is utilized to improve the bonding performance of the interface and the flexibility of the fiber to form adhesive-based active carbon fiber.

[0025] The preparation method of the high water-absorbing wet fiber E is as follows:

[0026] (1) During the slicing of the polyacrylonitrile fiber, sufficient moisture-absorbing component carboxymethyl cellulose or sodium alginate is added, and the mixture is heated by a screw machine and extruded and granulated after being completely melted at a temperature of 120-150°C;

[0027] (2) After the melt enters the spinning assembly, it is filtered by different particle size filter sand;

[0028] (3) The filtered melt is extruded into a filament bundle through a special-shaped spinneret hole, and the special-shaped spinneret hole is selected from any one of u-shaped, w-shaped, c-shaped, and elliptical cross-section structures;

[0029] (4) The filament bundle is cooled, oiled, shaped, and wound to form the high water-absorbing wet fiber E.

[0030] In step (4), the high water-absorbing resin B:

[0031] (1) Dry flask is sequentially added with starch, ammonium sulfate solution, and acrylonitrile monomer, wherein the mass ratio of starch: ammonium sulfate solution: acrylonitrile monomer is 3:2:1;

[0032] (2) The beaker is placed in a warm water bath at 45-60°C, and graft polymerization is carried out under the protection of nitrogen for 1-2 hours;

[0033] (3) The reactants are washed with ionized water and acetone, and then dried at 60-80°C under vacuum.

[0034] ⑷The dry product is subjected to steam reflux hydrolysis, grafting reaction with starch, and saponification with ethanol for 4-6 hours;

[0035] ⑸The product after saponification is washed with 0.05% sulfuric acid solution, and then, in a vacuum state, neutralized with 0.08% sodium hydroxide solution to pH 5-8, and dried at 90-120 DEG C to obtain a superabsorbent resin B.

[0036] In step ⑤, the sensor includes a heavy metal sensor, a high phosphorus sensor, a high nitrogen sensor, and a high moisture content sensor.

[0037] The positive beneficial effects of the present application are as follows:

[0038] 1. The building waste anti-seepage network established by the active pumping method changes the traditional anti-seepage wall with blocking effect, and the method of dredging is more effective than blocking, which is beneficial to dredging and can timely adjust the strength of anti-seepage according to the situation of leakage liquid in the waste field, and is energy-saving and environment-friendly.

[0039] 2. In the present application, the spiral pipe is inserted into the soil, and the spiral pipe is uniformly laid around and at the bottom of the waste field by using the spiral drill to form a spiral pipe network structure, thereby forming a complete building waste anti-seepage network.

[0040] 3. The high-polluted water absorbing composite fiber in the present application is composed of seaweed fiber with heavy metal ion adsorption capacity, activated carbon fiber with nitrogen and phosphorus element absorption capacity, and high water absorbing wet fiber. The seaweed fiber with heavy metal ion adsorption capacity is a kind of natural high molecular functional fiber processed by spinning from sodium alginate extracted from kelp as basic raw material. There are a large number of hydroxyl and carboxyl functional groups on the surface of the fiber, which can form a complex with heavy metals, so that the heavy metal ions are adsorbed on the surface of the material. The seaweed fiber has the characteristics of long fiber length, high strength, strong flexibility, strong absorption capacity, and pure natural production raw material. The activated carbon fiber is viscose-based activated carbon fiber, which avoids the shortcomings of ordinary activated carbon fiber and is beneficial to the production of composite fiber in the later period. The activated carbon fiber contains a large amount of viscose-based material, which can complete the lamination and weaving without the need of adhesive material, and is green, environmentally friendly and low in cost.

[0041] 4、The present application is provided with heavy metal sensor, high phosphorus sensor, high nitrogen sensor, high water content sensor, can real-time dynamic monitoring the change process of various pollutants in the internal soil, provide landfill site pollutant composition control, when the high water absorption resin pollutant index exceeds the standard, open the water pump, through the sewage anti-seepage network composed of underground spiral pipe, the bottom of high sewage absorption composite fiber absorbs the leakage liquid, prevent the leakage of building waste to the soil, provide effective data support for the later treatment of the pollution site.

[0042] 5、The present application can update the material through a relatively simple and low-cost method, realize the durability of the building waste anti-seepage structure.

[0043] 6、The building waste anti-seepage network constructed by the present application has the characteristics of sustainability, green environmental protection, low cost and strong environmental adaptability, is a new type of building waste anti-seepage network different from the existing one, and has good practical value and popularization prospect. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a structural schematic view of the building waste anti-seepage network in the present application;

[0045] Figure 2 It is a structural schematic view of the spiral pipe structure formed by spiral winding of the filamentous hollow pipe material in the present application;

[0046] Figure 3 It is a structural schematic view of the structure provided with an opening on the spiral pipe in the present application;

[0047] Figure 4 It is a cross-sectional structural schematic view of Figure 1

[0048] Figure 5 It is a structural schematic view of the high sewage absorption composite fiber formed by interlacing and winding the high water absorption wet fiber, the seaweed fiber and the active carbon fiber on the high water absorption wet fiber. DETAILED DESCRIPTION

[0049] The present application will be further explained and described below in combination with the drawings and specific embodiments:

[0050] Reference is made to Figures 1-5 ​1. A construction and use method of a construction waste anti-seepage net, comprising the following steps:

[0051] ① curling a filamentous hollow pipe material into a spring-shaped spiral pipe structure, setting openings on the spiral pipe every 0.01 m, the diameter of the spiral pipe being about 0.05 m, the strength reaching 100 kPa, and the length being set according to a construction waste construction site;

[0052] ② during a preliminary construction stage of a waste site, using a spiral drill to uniformly lay the spiral pipe at the periphery and the bottom of the waste site to form a spiral pipe net structure;

[0053] ③ after the spiral pipe net is laid, filling high-polluted water absorption composite fiber A into the spiral pipe through a pressure machine to form a polluted water anti-seepage net;

[0054] ④ setting a coarse pipe for connection at a position where the spiral pipe is exposed to the ground, the coarse pipe being provided with high water absorption resin B, and the high water absorption resin B connecting the high-polluted water absorption composite fiber A in the spiral pipe;

[0055] ⑤ setting a plurality of sensors on the coarse pipe on the ground to monitor the pollution index of the high water absorption resin B in real time;

[0056] ⑥ setting a water pump on the other side of the coarse pipe, and when the pollution index of the high water absorption resin B exceeds a standard, opening the water pump to extract the seepage liquid absorbed by the high-polluted water absorption composite fiber A through the polluted water anti-seepage network composed of the underground spiral pipe to prevent the seepage liquid of the construction waste from seeping into the soil;

[0057] ⑦ when it is detected that the high-polluted water absorption composite fiber A and the high water absorption resin B are aging or the water absorption performance is decreased, hooking the water absorption resin and the fiber on both sides of the pipe with iron hooks respectively, and hooking out the water absorption resin and the fiber by pulling one end of the iron hook, and connecting a wire on the other end of the iron hook;

[0058] ⑧ hanging new water absorption fiber on the wire, and pulling the wire to drive the new water absorption fiber into the spiral pipe, thereby realizing the durability of the anti-seepage net structure without the need of excavation or re-pouring as in the traditional anti-seepage wall.

[0059] In step ③, the high-polluted water absorption composite fiber A is composed of seaweed fiber C with the ability to adsorb heavy metal ions, active carbon fiber D to absorb nitrogen and phosphorus elements, and high water absorption wet fiber E, the weight ratio of the seaweed fiber C, the active carbon fiber D, and the high water absorption wet fiber E being 1:1:8, the high water absorption wet fiber E being the main shaft, and the seaweed fiber C and the active carbon fiber D being interlaced and wound on the high water absorption wet fiber E to form the high-polluted water absorption composite fiber A.

[0060] The seaweed fiber C with the heavy metal ion adsorption capacity is a natural polymer functional fiber made of sodium alginate extracted from kelp as a basic raw material, and a large number of hydroxyl and carboxyl functional groups exist on the surface of the seaweed fiber C, which can form a complex with heavy metals, so that the heavy metal ions are adsorbed on the surface of the material; the seaweed fiber C has the characteristics of long fiber length, high strength, strong flexibility, strong absorption capacity, and pure natural production raw material.

[0061] The preparation method of the activated carbon fiber D for absorbing nitrogen and phosphorus elements is as follows:

[0062] (1) Raw materials: polyacrylonitrile fiber and hydrogen peroxide gas;

[0063] (2) Oxidation treatment: sufficient hydrogen peroxide gas is introduced into the polyacrylonitrile fiber for oxidation treatment, and the structure of the polyacrylonitrile fiber is gradually stabilized during the oxidation process, forming polyacrylonitrile oxidized fiber with high thermal stability and carbonization rate;

[0064] (3) Carbonization treatment: the polyacrylonitrile oxidized fiber is carbonized at a high temperature of 1150-1250°C for 1-2 hours to form carbon fiber;

[0065] (4) Heat treatment: the carbon fiber after carbonization is further heat treated at a high temperature of 2450-2600°C to remove impurities in the internal structure of the carbon fiber and make the structure more stable;

[0066] (5) Adhesive treatment: the carbon fiber is surface treated to utilize its porosity to improve the bonding performance of the interface and the flexibility of the fiber, forming adhesive-based activated carbon fiber.

[0067] The preparation method of the high water-absorbing wet fiber E is as follows:

[0068] (1) During the polyacrylonitrile fiber slicing process, sufficient moisture-absorbing component carboxymethyl cellulose or sodium alginate is added, and the mixture is heated to complete melting at a temperature of 120-150°C by a screw machine, and then extruded and granulated;

[0069] (2) After the melt enters the spinning assembly, it is filtered by different particle size filter sand ratio;

[0070] (3) The filtered melt is extruded into a filament bundle from a special-shaped spinneret hole, and the special-shaped spinneret hole is selected from any one of u-shaped, w-shaped, c-shaped and oval-shaped structures;

[0071] (4) The filament bundle is cooled, oiled, shaped and wound to form the high water-absorbing wet fiber E.

[0072] In step ④, the high water-absorbing resin B:

[0073] (1) Add starch, ammonium sulfate solution and acrylonitrile monomer into a dry flask in sequence, wherein the mass ratio of starch:ammonium sulfate solution:acrylonitrile monomer is 3:2:1;

[0074] (2) Place the beaker in a warm water bath at 45-60°C and perform graft polymerization under the protection of nitrogen for 1-2 hours;

[0075] (3) Clean the reaction with ionized water and acetone, and then dry under vacuum at 60-80°C;

[0076] (4) Perform steam reflux hydrolysis on the dried product, graft reaction with starch, and saponification with ethanol for 4-6 hours;

[0077] (5) Clean the saponification product with 0.05% sulfuric acid solution, and then neutralize the acidic solution to pH 5-8 with 0.08% sodium hydroxide solution under vacuum, and then dry at 90-120°C to obtain high water absorption resin B.

[0078] In step (5), the sensors include heavy metal sensors, high phosphorus sensors, high nitrogen sensors, and high water content sensors.

[0079] In this embodiment, the high sewage absorption composite fiber A is composed of seaweed fiber C with heavy metal ion adsorption capacity, activated carbon fiber D with nitrogen and phosphorus element absorption capacity, and high water absorption wet fiber E. The weight ratio of seaweed fiber C, activated carbon fiber D, and high water absorption wet fiber E is 1:1:8. The high water absorption wet fiber E is the main shaft, and the seaweed fiber C and the activated carbon fiber D are intertwined and wound on the high water absorption wet fiber E to form the high sewage absorption composite fiber A. After the high sewage absorption composite fiber A absorbs water from the bottom, it transmits upward to form a lifting force for water absorption, which drives the heavy metal particles, nitrogen and phosphorus particles, and other particles at the bottom to rise upward. At the position where the pipeline is exposed on the ground, a coarse pipeline is provided for connection. The pipeline is provided with high water absorption resin B, which has a water absorption capacity of 100 times its own weight and is connected to the high sewage absorption composite fiber A in the underground pipeline. The upward lifting force generated by the water absorption effect drives the sewage absorbed by the high sewage absorption composite fiber A at the bottom to rise upward, thereby effectively reducing the leakage at the bottom and absorbing the sewage into the coarse pipeline at the top for discharge.

[0080] The building waste anti-seepage network established by the active pumping method in this embodiment changes the traditional anti-seepage wall with blocking effect, and the method of dredging is more effective than blocking. The strength of the anti-seepage can be adjusted in time according to the leakage of the landfill, which is energy-saving and environmentally friendly.

[0081] The embodiment inserts a spiral pipe into the soil body, and uses the construction setting of the spiral pipe to uniformly lay the spiral pipe around and at the bottom of the garbage site by using a spiral drill under the condition of disturbing the soil body as little as possible, to form a spiral pipe network structure and form a complete construction waste anti-seepage network.

[0082] The high-polluted water absorption composite fiber in the embodiment is composed of seaweed fiber with heavy metal ion adsorption capacity, activated carbon fiber with nitrogen and phosphorus element absorption capacity, and superabsorbent fiber, and the superabsorbent fiber is used as the main shaft, and the seaweed fiber and the activated carbon fiber are overlapped and wound on the superabsorbent fiber E to form the high-polluted water absorption composite fiber. The seaweed fiber with heavy metal ion adsorption capacity is a kind of natural high-molecular functional fiber processed by using sodium alginate extracted from kelp as a basic raw material, and a large number of hydroxyl and carboxyl functional groups exist on the surface of the seaweed fiber. These functional groups can form a complex with heavy metals, so that the heavy metal ions are adsorbed on the surface of the material. The seaweed fiber has the characteristics of long fiber length, high strength, strong flexibility, strong absorption capacity, and pure natural production raw material. The activated carbon fiber is viscose-based activated carbon fiber, which avoids the shortcomings of ordinary activated carbon fiber, is beneficial to the production of the composite fiber in the later period, and contains a large amount of viscose-based material, so that the viscose-based activated carbon fiber can be attached and woven without the need of adhesive materials, and is green, environmentally friendly and low in cost.

[0083] The embodiment is provided with a heavy metal sensor, a high-phosphorus sensor, a high-nitrogen sensor, and a high water content sensor, which can dynamically monitor the change process of various pollutants in the internal soil body in real time, provide component control of the pollutants in the garbage landfill site, and when the pollutant index of the superabsorbent resin exceeds the standard, open the water pump to extract the leakage liquid absorbed by the high-polluted water absorption composite fiber in the bottom through the sewage anti-seepage network composed of the underground spiral pipe, prevent the leakage liquid of the construction waste from seeping into the soil, and provide effective data support for the later treatment of the polluted site.

[0084] The embodiment can update the material by a relatively simple and low-cost method, and realize the durability of the construction waste anti-seepage structure. When the high-polluted water absorption composite fiber and the superabsorbent resin are detected to be aged or have a reduced water absorption performance, the water absorption resin and the fiber on both sides of the pipe are hooked by iron hooks respectively, the water absorption resin and the fiber are hooked out by pulling one end of the iron hook, the other end of the iron hook is connected with an iron wire, new water absorption fiber is hung on the iron wire, the iron wire is pulled to drive the new water absorption fiber into the spiral pipe, and the durability of the anti-seepage network structure is realized. Unlike the traditional anti-seepage wall, the anti-seepage wall does not need to be excavated or re-poured, and the maintenance cost is effectively reduced.

[0085] The construction waste anti-seepage network constructed in the embodiment has the characteristics of sustainability, green environmental protection, low cost, and strong environmental adaptability, and is a new type of construction waste anti-seepage network different from the existing one, and has good practical value and promotion prospect.

[0086] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application are still within the protection scope of the technical solution of the present application.

Claims

1. A method for constructing and using a construction waste anti-seepage net, characterized in that, Includes the following steps: ① The filamentous hollow tube is coiled into a spring-shaped spiral tube structure, and an opening is set on the spiral tube at a position of 0.01m. The diameter of the spiral tube is 0.05m, the strength reaches 100kPa, and the length is set according to the construction waste site. ② In the early stages of landfill construction, a spiral drilling rig is used to evenly lay spiral pipes around the perimeter and bottom of the landfill to form a spiral pipe network structure; ③ After the spiral pipe network is laid, high sewage absorption composite fiber A is injected into the spiral pipe through a press to form a sewage seepage prevention net; ④ At the point where the spiral tube protrudes above the ground, a thick pipe is installed for connection. The thick pipe contains super absorbent resin B, which is connected to the high wastewater absorption composite fiber A in the spiral tube. ⑤ Several sensors are installed on the thick pipes on the ground to monitor the pollutant indicators of superabsorbent resin B in real time. ⑥ A pump is installed on the other side of the thick pipe. When the pollutant index of superabsorbent resin B exceeds the standard, the pump is turned on and the leachate absorbed by the high sewage absorption composite fiber A at the bottom is extracted through the sewage anti-seepage network composed of underground spiral pipes to prevent the leachate of construction waste from seeping into the soil. ⑦ When it is detected that the high wastewater absorption composite fiber A and the high water absorption resin B are aging or have decreased water absorption performance, use an iron hook to hook the water absorption resin and fiber on both sides of the pipe respectively, and pull the iron hook at one end to hook out the water absorption resin and fiber. The other end of the iron hook is connected to an iron wire. ⑧ Hang new absorbent fibers on the wire, pull the wire to move the new absorbent fibers into the spiral pipe, thereby achieving the durability of the seepage prevention net structure, without the need for excavation or re-pouring as with traditional seepage prevention walls.

2. The construction and use method of the construction waste anti-seepage net according to claim 1, characterized in that: In step ③, the high wastewater absorption composite fiber A is composed of seaweed fiber C, which has the ability to adsorb heavy metal ions, activated carbon fiber D, which absorbs nitrogen and phosphorus elements, and highly absorbent wet fiber E. The weight ratio of seaweed fiber C, activated carbon fiber D, and highly absorbent wet fiber E is 1:1:

8. With highly absorbent wet fiber E as the main axis, seaweed fiber C and activated carbon fiber D are intertwined and wrapped around highly absorbent wet fiber E to form high wastewater absorption composite fiber A.

3. The construction and use method of the construction waste anti-seepage net according to claim 2, characterized in that: The seaweed fiber C with the ability to adsorb heavy metal ions is a natural high-molecular functional fiber made from sodium alginate extracted and processed from kelp as the basic raw material and spun. It has a large number of hydroxyl and carboxyl functional groups on its surface. These functional groups can form complexes with heavy metals, thereby adsorbing heavy metal ions on the surface of the material. The seaweed fiber C has the characteristics of long fiber length, high strength, strong flexibility, strong absorption capacity and pure natural raw materials.

4. The construction and use method of the construction waste anti-seepage net according to claim 2, characterized in that, The preparation method of the nitrogen and phosphorus-absorbing activated carbon fiber D is as follows: (1) Raw materials: polyacrylonitrile fiber, hydrogen peroxide gas; (2) Oxidation treatment: Sufficient hydrogen peroxide gas is introduced into the polyacrylonitrile fiber to carry out oxidation treatment. During the oxidation process, the structure of the polyacrylonitrile fiber gradually stabilizes, forming polyacrylonitrile oxidized fiber with high thermal stability and carbonization rate. (3) Carbonization treatment: The polyacrylonitrile oxidized fiber is carbonized at a high temperature of 1150-1250℃ for 1-2 hours to form carbon fiber; (4) Heat treatment: The carbonized carbon fibers are further heat treated at a high temperature of 2450-2600℃ to remove impurities in the internal structure of the carbon fibers and make the structure more stable. (5) Adhesive treatment: The carbon fiber is surface treated to improve its interfacial bonding performance and fiber flexibility by utilizing its porosity, thus forming viscose-based activated carbon fiber.

5. The construction and use method of the construction waste anti-seepage net according to claim 2, characterized in that: The method for preparing the superabsorbent wet fiber E is as follows: (1) During the polyacrylonitrile fiber slicing process, add sufficient hygroscopic component carboxymethyl cellulose or sodium alginate, heat it through a screw press at a temperature of 120-150℃ until it is completely melted, and then extrude and granulate it. (2) After the melt enters the spinning assembly, it is filtered by filter sand of different particle sizes in different proportions; (3) The filtered melt is extruded into a filament bundle through a shaped spinneret orifice. The shaped spinneret orifice can be any one of the following four cross-sectional structures: U-shaped, W-shaped, C-shaped, and elliptical. (4) The filament bundle is cooled, oiled, shaped and wound to obtain highly absorbent wet fiber E.

6. The construction and use method of the construction waste anti-seepage net according to claim 1, characterized in that: In step ④, the superabsorbent resin B: (1) Add starch, ammonium sulfate solution and acrylonitrile monomer to a dry flask in sequence, wherein the mass ratio of starch:ammonium sulfate solution:acrylonitrile monomer is 3:2:1; (2) Place the beaker in a warm water bath at 45-60°C and carry out graft polymerization for 1-2 hours under nitrogen protection. (3) After washing the reactants with deionized water and acetone, they are dried under vacuum at 60-80°C. (4) The dried product is subjected to steam reflux hydrolysis, grafting reaction is carried out using starch, and saponification is carried out using ethanol for 4 to 6 hours. (5) The product after the saponification reaction is washed with 0.05% sulfuric acid solution. Finally, under vacuum, the acidic solution is neutralized to pH 5-8 with 0.08% sodium hydroxide solution and then dried at 90-120℃ to obtain superabsorbent resin B.

7. The construction and use method of the construction waste anti-seepage net according to claim 1, characterized in that: In step ⑤, the sensors include heavy metal sensors, high phosphorus sensors, high nitrogen sensors, and high moisture content sensors.

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