29results about How to "Reduce water permeability" patented technology

The invention belongs to the field of roof waterproof protection layers, and particularly discloses a roof waterproof protection layer construction method based on microbial concrete, which comprises the following specific steps: S1, microbial culture; s2, protective carrier wrapping; s3, preparing concrete; s4, concrete pouring; s5, concrete curing; according to the invention, expanded perlite particles are used as a carrier medium to respectively immobilize individual bacillus and aerobic mixed bacteria, so that the expanded perlite particles are activated and induced to form a composite mineralized structure when cracks are formed, the crack repairing effect is enhanced, and the high strength of aragonite and the good filling property of calcite are combined, so that the crack repairing effect is improved. According to the present invention, the expanded perlite particles are adopted as the carrier medium, and are combined with the hydrogel wrapping the surface of the bacteria-containing expanded perlite, such that the microorganism can be protected, the water storage agent can be used as the water storage agent, and the living environment of the microorganism can be enhanced.

The invention provides a preparation method and application of a novel UHPC tunnel jacking pipe, belonging to the technical field of ultra-high performance concrete. The preparation method comprises the following steps: S1, by weight, 63 parts of cement, 7-10 parts of silica fume, 7-10 parts of slag powder, 12-15 parts of fly ash, 2.8-3 parts of oxidized steel fiber, 1.8-2.2 parts of Fe3O4@SiO2 core-shell hydrophobic agent and 18-22 parts of quartz sand are mixed to obtain a mixed dry material; S2, by weight, 19-21 parts of water are firstly added. Add to the mixed dry material, then add 0.9-1.4 parts of high-efficiency water reducer and 0.4-0.6 parts of dispersant, mix well, and obtain UHPC material; S3, pour the UHPC material into a mold with a steel skeleton, vibration-assisted molding, curing, demoulding, and obtain a new UHPC tunnel jacking pipe; oxidized steel fiber is prepared by soaking steel fiber in sodium hypochlorite solution; Fe3O4@SiO2 core-shell hydrophobic agent is prepared by coating Fe3O4 magnetic nanoparticles with SiO2 shell layer, and then introducing a silane layer with amino group on the surface. The present invention ensures that UHPC has excellent mechanical properties (compressive strength, tensile strength) and water penetration resistance at the same time.

The invention discloses an assembly type ecological building protection structure suitable for a high groundwater level canal section, the assembly type ecological building protection structure comprises a foundation and a protection slope which are symmetrically arranged on the two sides of a canal, the foundation comprises a prefabricated slope toe and a slope toe cushion layer arranged on the lower portion of the prefabricated slope toe, and the protection slope comprises a lock catch brick layer, a first abutment cap, a first honeycomb geocell and other structures. A self-adaptive frost heaving deformation fabricated structure is adopted as a whole, frost heaving force is released, the construction speed is high, meanwhile, synchronous construction can be achieved through the provided construction method, construction is not affected by construction time, construction can be conducted in any season, the construction efficiency is improved, the construction cost is reduced, and synchronous water supply can be achieved in the construction period. The invention further discloses a dynamic safety evaluation system for the channel slope, the system fuses field multi-source monitoring data, realizes automatic monitoring and constructs a comprehensive supervision system in combination with survey data and data, so that problems are found in time, hidden dangers are processed in time, comprehensive management of the channel is realized, and the maintenance cost is reduced.

The utility model belongs to the technical field of water body ecological restoration, and discloses a river channel water body maintenance biological wall which comprises microbial filler screen plates arranged on a supporting plate through a plurality of rotating shafts and further comprises a cleaning mechanism arranged on the supporting plate and used for cleaning meshes in the microbial filler screen plates. The cleaning mechanism comprises a mounting plate arranged on the side, close to the microbial filler screen plate, of the supporting plate, and a plurality of cleaning rods are fixedly connected to the side, close to the microbial filler screen plate, of each strip-shaped plate. According to the river channel water body maintenance biological wall, through arrangement of the cleaning mechanism, under the driving action of the driving mechanism, all the cleaning rods are driven to be inserted into the meshes in a reciprocating mode, so that cleaning of impurities in the meshes is achieved, and the smoothness of the meshes is guaranteed; the water permeability of the microbial filler screen plate and the purification effect on a river water body are prevented from being reduced due to the blockage of the meshes.

The embodiment of the utility model provides a packaging film, a battery monomer, a battery and electric equipment. The packaging film is used for wrapping an electrode assembly. The packaging film comprises a supporting film layer and a breathable film layer which are arranged in a stacked mode. And the breathable film layer is used for wrapping the electrolyte. The supporting film layer is connected with the electrode assembly and used for supporting the breathable film layer, and a plurality of liquid storage holes are formed in the supporting film layer. The packaging film provided by the embodiment of the utility model is used for wrapping the electrode assembly and protecting the electrode assembly from being scratched and damaged, and the breathable film layer of the packaging film is relatively high in breathability and relatively low in water permeability, so that gas generated in the use process of the battery can permeate through the breathable film layer. Besides, in the electrolyte injection process, the gas-permeable film layer can prolong the retention time of the electrolyte in the packaging film, so that the electrolyte fully infiltrates the electrode assembly as much as possible, and the electrolyte injection efficiency and the infiltration effect are improved.

The invention discloses a lignin-based liquid mulching film as well as a preparation method and application thereof, the liquid mulching film is prepared by taking lignosulfonate as a main raw material, compounding the lignosulfonate with chitosan and polyvinyl alcohol to form a basic solution, then carrying out crosslinking modification by epoxy chloropropane and complexing treatment by tetrakis hydroxymethyl phosphonium chloride, and finally adding nano kaolin and uniformly stirring. When in use, the fertilizer is diluted with water and then sprayed on the surface of soil to form a uniform covering film. According to the invention, a phenylpropane structure of lignosulfonate is fully utilized as a rigid framework of a polymer, and the obtained mulching film has good film-forming property, hydrophobicity and heat preservation and moisture conservation performance through a tackifying effect of chitosan, a toughening effect of polyvinyl alcohol and synergistic modification of the cross-linking agent and the complexing agent. The addition of the nano kaolin further enhances the infrared barrier ability of the mulching film and reduces heat loss at night.

This utility model discloses a low-shrinkage joint structure suitable for bridge widening and reconstruction projects, belonging to the field of bridge reconstruction technology. Its key technical features include an old bridge main body, a new bridge main body, a buffer component, and a support component. A joint is pre-installed between the old and new bridge main bodies. The buffer component is located within the joint and includes a top plate, a bottom plate, and a buffer plate. The buffer plate abuts against the inner wall of the joint. A connecting column is fixedly connected between the top and bottom plates. Two symmetrically distributed sliding sleeves are fitted onto the connecting column, and a spring abuts between the two sliding sleeves. A connecting rod is hinged between the sliding sleeves and the buffer plate. The technical effect is that by setting up the buffer component and support component, cracks caused by rigid tension are avoided when the new bridge main body settles or shifts laterally. This flexible buffer mechanism can control the relative displacement at the joint within a safe range, effectively eliminating stepped misalignments on the bridge deck and ensuring driving safety and smoothness.

The invention discloses an environment-friendly grillage machine for sewage treatment. The environment-friendly grillage machine comprises a grillage machine shell and a solid-liquid separation mechanism, the solid-liquid separation mechanism comprises a filter roller, a flexible filter layer and an extrusion roller; a row of filtering rollers are obliquely and rotatably arranged in the grillage machine shell, and a discharging opening is formed in the position, located at the discharging ends of the row of filtering rollers, of the side wall of the grillage machine shell. A flexible filter layer which performs intermittent transmission in the horizontal direction and of which the discharge end penetrates out of the side wall of the grillage machine shell is horizontally arranged in the grillage machine shell below the row of filter rollers through a belt transmission mechanism; and two rotatable extrusion rollers which can move towards the discharging end to extrude the upper side and the lower side of the stopped discharging end are respectively and horizontally arranged on the upper side and the lower side of the discharging end of the flexible filtering layer. And organic impurities cannot be separated from the impurities.

The present invention relates to a hollow fiber membrane in which the thickness L of a spherical structure layer is 60-500 µm (inclusive), the spherical structure layer has a first surface and a second surface, the average diameter Dai of the spherical structure in a region Sa1 10 µm or less from the first surface and the average diameter Db2 of the spherical structure in a region Sb2 10-20 µm from the second surface satisfy the relational expression Da1 > Dbz, and the spherical structure satisfies certain parameters.

The invention provides a foam concrete formula and a production process. The foam concrete formula comprises the following raw materials in parts by weight: 150-200 parts of cement, 45-75 parts of a mineral admixture, 10-20 parts of a foaming agent, 30-40 parts of aggregate, 10-20 parts of an additive, 10-20 parts of a cracking agent and a proper amount of water. According to the present invention, the foam concrete is easily cracked, the cracking agent can effectively solve the problem, and the surface tension of the foam concrete is increased by the cracking agent through the surface tension reinforcing agent so as to reduce the chance of the crack generation; the cement hydration reaction is promoted, so that the compressive strength and splitting compressive strength of the foam concrete are remarkably improved, and the service life of the foam concrete is prolonged.

The application belongs to the field of building construction, in particular to a deep foundation pit dewatering well sealing device, which comprises a base, a fixing frame is bolted on the top of the base, a winch is fixedly connected to the top of the fixing frame, a steel wire rope is fixedly connected to the winch, a first fixing seat is fixedly connected to the bottom end of the steel wire rope, an extension rod is fixedly connected to the bottom of the first fixing seat, a second fixing seat is fixedly connected to the bottom end of the extension rod, a cavity is formed in the first fixing seat and the second fixing seat, the fixing plate and the sealing plate are combined into an annular pipe by the above-mentioned setting, the annular pipe is attached to the inside of the dewatering well, which can block the groundwater, thereby facilitating subsequent control of the water level and subsequent well sealing steps, and can support the soft soil layer and reduce the occurrence of sand flow.

The utility model relates to the technical field of tunnel bridge engineering, and discloses a tunnel bridge roadbed anti-seepage reinforcing assembly which comprises a water tank, universal wheels are fixedly connected to the four corners of the bottom end of the water tank, a limiting plate is fixedly connected to the top end of the water tank, a reinforcing plate is arranged on one side of the limiting plate, and an L-shaped plate is fixedly connected to the top end of the reinforcing plate. A water drainage plate is fixedly connected to the position, close to the connecting position of one side of the bottom end of the L-shaped plate and the reinforcing plate, of the bottom end of the L-shaped plate, and a water guide pipe is movably connected to the outer wall, close to the front end, of the water drainage plate in a sleeved mode. And a screw rod is driven to move under thread engagement of a supporting seat, then a guide column and a limiting block are driven to move to the position, close to the bottom end, of the front side of a reinforcing plate, the bottom end of the reinforcing plate is extruded, the reinforcing plate is tightly attached to the bottom of the to-be-reinforced base face of the tunnel bridge, and the water seepage situation is reduced.

The invention discloses a modification method of an internal solid waste material of a warmer pad and a modified material, and the modification method comprises the following steps: taking out the internal solid waste material of the warmer pad, carrying out water washing treatment, mixing the internal solid waste material with a salicylic acid solution, and carrying out a reaction to obtain the modified material. According to the modification method, the internal solid waste material of the warmer pad is used as a raw material, the modified material which is large in specific surface area, multiple in active site, high in catalytic activity, stable in performance and environmentally friendly can be prepared through water washing and salicylic acid modification, and the modified material serves as a novel Fenton-like reaction catalyst with excellent performance and is widely used for activating an oxidizing agent; and meanwhile, resource utilization of the warmer pad waste can be achieved, the use value is high, and the application prospect is good. Meanwhile, the modification method disclosed by the invention also has the advantages of wide raw material source, low preparation cost, simplicity and convenience in operation, non-toxic and harmless product, environment friendliness and the like, and is suitable for large-scale production and application.

The present invention discloses a prefabricated variable diameter hole pipe pile structure for soft foundation treatment and a construction method thereof, which relates to the field of prefabricated pipe piles. The existing pile body small holes with equal apertures cannot quickly discharge the increased pore water in the soil around the deeper pile body into the pipe cavity, and the soil around the pile is easy to block the pile body small holes while discharging the pore water during the pile sinking process, and cause the soil around the pile to be lost. The present invention can discharge the super pore water more quickly and prevent pile sinking accidents by setting a plurality of pile body small holes, i.e., variable diameter holes, whose apertures gradually increase from the pile top to the pile bottom along the axial direction of the pipe pile, on the pipe pile wall; by wrapping a geotextile on the outer side of the pipe pile wall, utilizing the anti-filtration and drainage effects of the geotextile, the super pore water and gas in the soil around the pile are discharged into the pipe cavity through the pores of the geotextile, and at the same time, soil particles are intercepted to prevent the soil from blocking the pile body small holes, and can maintain the stability of the water and soil engineering within the range of the pile body small holes, and prevent soil and water loss in a local range.

The invention provides a POE (Polyolefin Elastomer) composite adhesive film and a preparation method and application thereof, the POE composite adhesive film comprises a three-layer structure, an upper layer and a lower layer are bonding antiskid layers, a middle layer is a barrier layer, and the bonding antiskid layers adopt POE particles with high fat solubility; the high-fat-solubility POE particle additive is relatively high in adsorption capacity, so that the conditions of migration and surface of the additive can be greatly reduced, and slipping is reduced; silane and POE are combined in advance through the silane grafting material, so that the precipitation probability of the auxiliary agent is further reduced; ethylene modified resin is added into the barrier layer to improve the polarity and improve the hydrophobicity of the adhesive film, so that the adhesive film has lower water permeability, and the crosslinking density is improved by combining with compound acrylate, so that the water-resisting property of the whole adhesive film is greatly improved, the water vapor permeability in the use process is prevented, and the normal work of a battery piece is kept.

The invention provides a non-pre-crosslinking type white EVA adhesive film and application thereof. The non-pre-crosslinking type white EVA adhesive film is prepared from the following components: EVA particles, polyethylene, titanium dioxide, a crosslinking agent, an anti-hydrolysis agent, silane, an acid acceptor, acrylate, a light stabilizer and an antioxidant. Compared with a pre-crosslinking type white EVA adhesive film, the adhesive film provided by the invention has the advantages that the water permeability is reduced, the adhesive film can still keep relatively high adhesive force with glass after being moistened for 2000 hours, the yellowing value is relatively small after UV and damp-heat aging, the acetic acid content is low, and the use efficiency of an assembly can be ensured for a long time.

The utility model discloses a multifunctional emergency rescue assembly bag which comprises a bag body, the bag body is connected with a bottom bag through a zipper c, a box body is bonded in the bottom bag, a filter screen is installed in the box body and located on the right side of a partition plate, the partition plate is connected with a ceramic membrane in a buckled mode, and the ceramic membrane is located on the inner side of folded PP cotton. The folded PP cotton is located on the inner side of the silver ion filter screen, the ceramic membrane is located on the outer side of the activated carbon, the activated carbon is located on the outer side of the water permeable pipe, the water permeable pipe is bonded with a micro-filtration membrane, and the bag body comprises a flame-retardant layer a, lining cloth, a waterproof layer a, flame-retardant cloth, a waterproof layer b, shell fabric and a flame-retardant layer b. The zipper c is unzipped to separate the bottom bag from the bag body, the baffle cloth is opened to pour water into the box body after separation, clean water flows out of the water permeable pipe for drinking, and clean water can be provided in the field and the like; the flame-retardant layer a, the waterproof layer a, the flame-retardant cloth and the like are matched to improve the integral waterproof and fireproof capability of the bag body, and medicines and the like on the inner side can be well protected.

The application aims at the problem of long process connection time, and provides a highland tunnel waterproof and drainage integrated construction device, relating to the technical field of tunnel waterproof and drainage, comprising: a mobile trolley arranged along the longitudinal direction of the tunnel and provided with a walking mechanism at the bottom; a waterproof operation unit arranged at the front of the mobile trolley and comprising a waterproof plate winch mechanism, a hot melt welding mechanical arm and a grouting assembly, the waterproof plate winch mechanism is used for unwinding the waterproof plate, the hot melt welding mechanical arm is used for fixing the waterproof plate on the surface of the initial support of the tunnel, and the grouting assembly is used for injecting filling slurry between the waterproof plate and the initial support; the application realizes waterproof and drainage integrated construction, so that the waterproof layer and the drainage groove are constructed synchronously and seamlessly overlapped, and the leakage hidden danger of the joint caused by the separation of traditional processes is completely eliminated.

The invention relates to the technical field of water permeable bricks, in particular to a biomass steel slag water permeable brick and a preparation method thereof.The biomass steel slag water permeable brick is prepared from, by weight, 12-18 parts of cement, 70-78 parts of coarse aggregate, 5-10 parts of fine aggregate, 0.3-0.45 part of straw powder and 4-6 parts of water; the preparation method comprises the following steps: (1) mixing the cement, the fine aggregate and the straw powder to obtain a mixture; (2) mixing the mixture obtained in the step (1) with coarse aggregate to obtain a mixture, and adding water into the mixture to obtain mixed slurry; and (3) injecting the mixed slurry obtained in the step (2) into a mold, carrying out vibration compression molding, and curing to obtain the biomass steel slag water permeable brick. The biomass steel slag water permeable brick prepared by the invention is excellent in water permeability and compressive strength.

The invention relates to the technical field of coal yard construction, in particular to a coal yard terrace and a construction method thereof.The coal yard terrace comprises a foundation layer, a first sandy cohesive soil supporting layer, a first geotechnical cloth layer, a waterproof film layer, a second geotechnical cloth layer, a second sandy cohesive soil supporting layer and a gravel soil layer which are sequentially arranged from bottom to top; the foundation layer, the first sandy cohesive soil supporting layer, the second sandy cohesive soil supporting layer and the gravel soil layer are all compacted through road rolling equipment, the rolling pressure of the foundation layer, the rolling pressure of the first sandy cohesive soil supporting layer, the rolling pressure of the second sandy cohesive soil supporting layer and the rolling pressure of the gravel soil layer are gradually reduced, and the supporting strength of the foundation layer and the supporting strength of the first sandy cohesive soil supporting layer are high; the second sandy cohesive soil supporting layer and the gravel soil layer have water permeability, coal water is isolated by the waterproof membrane layer, pollution of the coal water to soil below the terrace is avoided, the first geotechnical cloth layer and the second geotechnical cloth layer can prevent the waterproof membrane layer from being punctured, the construction cost is low, and the soil below the coal yard can be prevented from being polluted.

An anion exchange membrane having an anion exchange resin layer (3) reinforced by a base sheet (5), characterized in that the anion exchange resin layer (3) contains an anion exchange resin having a pyridinium group obtained by protonating a pyridyl group as an anion exchange group and a vinyl chloride resin as a thickening agent, and the base sheet (5) is a polyethylene woven fabric.

The invention provides a POE packaging adhesive film and a preparation method and application thereof.The POE packaging adhesive film comprises a POE composite adhesive film and micro-crosslinking layers formed on the upper surface and the lower surface of the POE composite adhesive film through crosslinking, the micro-crosslinking layers are formed on the upper surface and the lower surface of the POE composite adhesive film, and micro-network structures are formed on the surfaces of the micro-crosslinking layers, so that precipitation of auxiliaries can be inhibited, and the service life of the POE packaging adhesive film is prolonged. The surface friction coefficient is increased; and the problem of POE slipping is solved while the reliability of the adhesive film is not reduced.

The invention discloses a polymer waterproof material and a slope protection waterproof isolation pad, and relates to the technical field of polymer materials. The invention uses ethylene glycol dimethacrylate and glycidyl methacrylate as raw materials to prepare a modifier; then uses diethyltriamine and succinic anhydride to react to obtain component one; component one is modified by benzaldehyde and 1,2,4-trimellitic anhydride in sequence to obtain a polymer; finally, the secondary amine on the polymer polymer is alkylated with the epoxy group on the modifier to prepare a polymer waterproof material. The slope protection waterproof isolation pad of the present application has two layers of geotextiles and a modified mixed soil composition with a middle seal. The modified mixed soil composition prepared in the present application has the characteristics of high adsorption rate, fast adsorption rate, and selective adsorption, which effectively avoids the problem that the pores between the particles increase after the soil particles are corroded by landfill leachate, resulting in a decrease in the compactness of the structure and a decrease in the attraction between the particles.

The invention discloses an aged steel slag drainage asphalt mixture OGFC-10 and a preparation method thereof, and belongs to the technical field of steel slag resource utilization. Through the steel slag aging technology, the content of f-CaO in the converter tailings and the electric furnace tailings is reduced, the limitation that the content of f-CaO in the steel slag is high is broken through, and the steel slag is used for preparing the drainage asphalt mixture OGFC-10; the aged steel slag drainage asphalt mixture OGFC-10 is prepared from limestone not exceeding 3 mm, aged converter tailings not exceeding 5 mm, basalt 3-5 mm, basalt 5-10 mm, aged electric furnace tailings 5-10 mm, limestone mineral powder and SBS modified asphalt. The pavement performance test result of the obtained product shows that the material dynamic stability, the bending strain, the residual stability, the freeze-thaw splitting strength ratio, the friction coefficient and the water seepage coefficient of the drainage asphalt mixture doped with the aged steel slag are improved compared with those of the drainage asphalt mixture doped with the unaged steel slag, and the drainage asphalt mixture has wide application prospects and important environmental benefits.

The invention discloses a method for removing antibiotics in a water body by using a modified material, the method is characterized in that the modified material is used as a Fenton-like reaction catalyst to degrade the antibiotics in the water body, and the modified material is prepared by washing an internal solid waste material of a warmer with water and modifying with salicylic acid. According to the method, the modified material is a Fenton-like reaction catalyst which is large in specific surface area, multiple in active site, high in catalytic activity, stable in performance and environmentally friendly, the antibiotics in the water can be efficiently and thoroughly removed through Fenton-like reaction of the activating oxidizing agent, meanwhile, the pH value of a reaction system can be adjusted through the modified material, the pH value of a treated solution is close to neutral, and the treatment effect is good. The method has the advantages of being simple in process, convenient to operate, low in cost, high in treatment efficiency, good in treatment effect, small in dosage of added chemical agents, green, environmentally friendly and the like, antibiotics in water can be effectively removed, and reutilization of warmer waste can be achieved.

The invention provides a polyurethane loose nanofiltration membrane for efficient separation of salt and dye and a preparation method of the polyurethane loose nanofiltration membrane, and relates to the technical field of loose nanofiltration membranes. According to the polyurethane loose nanofiltration membrane for efficient separation of the salt and the dye, xylitol and toluene-2, 4-diisocyanate (TDI) are used as water phase monomers and oil phase monomers respectively, and the polyurethane loose nanofiltration membrane is obtained on a PVDF microfiltration membrane through an interfacial polymerization (IP) strategy and used for separation of the salt and the dye. Influences of different oil phase monomer concentrations on the physicochemical properties of polyurethane layers formed in the IP process are discussed. The structural form and chemical properties of the membrane are characterized, the interception of the prepared polyurethane membrane on single salt and single dye and the interception selectivity of a salt-dye composite system are evaluated respectively, and the feasibility and potential of the polyurethane loose nanofiltration membrane in the aspect of high-salt printing and dyeing wastewater resource utilization are verified.

The application provides a photovoltaic module connecting and mounting structure, which comprises at least two adjacent photovoltaic modules, each of which comprises photovoltaic module glass, a corrugated back plate and a frame, the photovoltaic module glass and the corrugated back plate are bonded by structural adhesive to form a bearing unit, a prefabricated silicone strip is clamped into the bearing unit in the direction of the long side of two sides, a preset hole is arranged on the frame, a rivet is installed through the preset hole and an angle code, a structural weld is formed by laser welding a stainless steel welding wire at the joint of the frame and the corrugated back plate, a sealant is filled in the gap between the folded edge of the corrugated back plate and the photovoltaic module glass, a penetrating self-drilling screw hook fixing piece is arranged between the frame bending grooves of two adjacent photovoltaic modules, and the penetrating self-drilling screw hook fixing piece is clamped and limited to a lower support piece through a self-tapping screw.

The invention discloses a bridge sidewalk waterproof layer structure and a construction method thereof, and belongs to the technical field of building construction.The bridge sidewalk waterproof layer structure comprises a sidewalk pavement layer, and a sidewalk waterproof layer is arranged above the sidewalk pavement layer; a drainage pipeline is arranged on the side, close to the handrail foundation base, of the sidewalk waterproof layer, the drainage pipeline is pre-buried at the bottom of the handrail foundation, and the handrail foundation base is arranged above the drainage pipeline; a drainage blind pipe is arranged on the side, close to the drainage pipeline, of the handrail foundation base, a drainage sand cushion layer is arranged above the sidewalk waterproof layer and the drainage blind pipe, and a sidewalk surface layer is arranged above the drainage sand cushion layer, so that the strength of the sidewalk structure is guaranteed, the drainage effect of the sidewalk structure is greatly improved, and the service life of the sidewalk structure is prolonged. Therefore, accumulated water in the sidewalk structure layer can be drained in time, damage caused by accumulated water is avoided, the waterproof quality of a bridge is improved, and the water seepage rate of the bridge floor is reduced. And the problems of later secondary repair, decoration and the like are reduced.

This invention discloses an adhesive for repairing photovoltaic (PV) modules, a preparation method thereof, and a method for repairing PV modules. The adhesive includes: a first adhesive, or a first adhesive and a second adhesive; when both are present, the second adhesive and the first adhesive are stored independently. The first adhesive includes: a glue prepolymer formed by the reaction of multiple raw materials; the multiple raw materials include at least 100 parts of epoxy acrylate resin, 3-5 parts of an organometallic catalyst, and 8-15 parts of a compound containing diisocyanate groups. The second adhesive includes liquid silica gel and fumed silica dispersed in the liquid silica gel; the liquid silica gel includes α,ω-dihydroxypolydimethylsiloxane, methyl silicone oil, a crosslinking agent, a coupling agent, a diluent, and a catalyst. Through the synergistic effect of the components in the first adhesive, this adhesive possesses toughness, high strength, and low water permeability, ensuring the reliability of the adhesive in repairing PV modules.