81results about How to "Improve waterproof effect" patented technology

A lens assembly comprises a lens group M and a lens frame 1 for retaining the lens group M. In this lens assembly, the lens frame 1 has an entire circumference support 2b for supporting the rim on the subject side, of each lens M, across the entire circumference thereof, and an end face support 2a for supporting the lens M on the image side. Each lens M comprises a chamfer 3b formed at a rim of a lens surface on the subject side across the entire circumference thereof, and the entire circumference support 2b supports the chamfer 3b such that the entire circumference support 2b is continuous with the lens surface at substantially the same radius of curvature with the lens surface. According to the present invention, there is provided a lens assembly which can reduce size and cost and has stable lens retaining ability.

The invention discloses a permeable crystallization type concrete waterproofing agent, which is prepared from the following components by weight: 15-25 parts of sodium silicate, 3-6 parts of sodium methyl silicate, 1-5 parts of sodium alginate, 4-8 parts of gelatin, 1-5 parts of dodecyl ethoxy sulphobetaine, 1-3 parts of sodium carbonate, 1-4 parts of sodium citrate, 1-4 parts of triethanolamine, 2-10 parts of aluminum potassium sulfate, 2-6 parts of calcium sulfate, 1-3 parts of polyacrylamide, 1-6 parts of calcium lignosulphonate, 3-6 parts of carboxymethylcellulose, 2-5 parts of calcium hydroxide, 1-3 parts of boric acid, and 60-90 parts of water. The waterproofing agent disclosed by the invention has the advantages of good waterproof performance, durability and self-healing property, and low cost, and can be applied to waterproofing of roofing, basements, toilets and the like.

The invention discloses a preparation method for an anti-crack, waterproof and weather-resistant building coating. The building coating comprises the following components: polyvinyl alcohol, polyacrylic emulsion, silica sol, polyamide, quick lime, castor oil, potassium oxide, zinc oxide, aluminum oxide, polyvinyl acetate, methyl methacrylate, phenolic resin, heavy calcium carbonate, bentonite and the like. The building coating provided by the invention is strong in binding power and anti-crack, thereby improving the waterproof effect; the building coating can be constructed on the wet or dry basic surfaces of various materials and is good in waterproof performance, nontoxic, harmless and long in service life; and the performance indexes of the hardness, water resistance, alkali resistance and scrubbing resistance of the coating after film formation are all relatively high, and meanwhile, the coating has excellent corrosion resistance and extremely good weather resistance.

The invention discloses an inorganic-organic composite permeable crystallization type concrete waterproof agent. The waterproof agent is prepared from, by weight, 20-30 parts of sodium silicate, 5-9 parts of methyl sodium silicate, 2-6 parts of sodium alginate, 7-9 parts of gelatin, 1-4 parts of dodecyl ethoxy sulpho betaine, 1-3 parts of sodium carbonate, 1-4 parts of sodium citrate, 2-5 parts of triethanolamine, 5-10 parts of aluminum potassium sulfate, 3-6 parts of calcium sulfate, 1-3 parts of polyving akohol, 1-3 parts of calcium lignosulphonate, 3-5 parts of carboxy methyl cellulose, 1-4 parts of calcium chloride, 1-3 parts of boric acid and 55-75 parts of water. The inorganic-organic composite permeable crystallization type concrete waterproof agent has good waterproofness, endurance performance and self-curing performance and is low in cost and capable of being applied to waterproofing of house faces, basements, restrooms and the like.

The invention discloses an on-site production and construction device for waterproofing treatment. The on-site production and construction device comprises a frame, wherein an oil pan and an oiled frame are arranged on one side of the frame; an oiled roller is arranged on the oiled frame; the oiled roller is located at the bottom of the oil pan; an embroidery cloth roller is arranged at the end part, which is located on one side of the oil pan, of the frame, and a transmission roller is arranged at a position, which is located on the other side of the oil pan, on the frame; a laminating roller is arranged beside the transmission roller; a raw material base cloth roller is arranged at a position, which is located below the laminating roller, at the middle part of the frame; a surface film roller is arranged at a position, which is located beside the raw material base cloth roller, on the frame; a steering wheel is arranged at each of the upper and lower end parts of the other side of the frame; and a pressing roller is further arranged below the oil pan. A coating material of the on-site production and construction device realizes subdivision of coiled waterproof raw materials; the coating quality is high, and the materials are optional and controllable; compared with an existing coiled material, the coating material has the advantages that a base film does not need to be torn off or roasted with fire, so that energy conservation and environmental protection are realized; the coating material is paved on a base surface and is molded at one time, so that the phenomenon that the construction is carried out for multiple times is avoided, and the labor is saved; and besides, the paved coiled material does not crinkle, and the landing edge does not crack. The coating device can be used for paving a hot-molten waterproof material, a normal-temperature cold coating material, a water-based material and the like.

The invention provides a waterproof binding clip. The waterproof binding clip comprises a binding clip case, a main wire and a tail wire. The binding clip case is composed of a bottom case and a face case; an inlet and outlet of the main wire and the inlet and outlet of the tail wire of the binding clip case are respectively provided with a waterproof shield; a waterproof sealing ring is arranged between the face case and the bottom case of the binding clip case. By arranging the waterproof shields at the wire inlets and outlets of the case and arranging the waterproof ring between the face case and the bottom case, accumulated water cannot enter wire end connecting parts inside the binding clip, so that the waterproof effects can be enhanced, and the detonating stability of a detonator can be effectively improved. Meanwhile, the waterproof binding clip is simple in structure, low in cost, easy to operate and applicable to mass production.

The invention discloses a heating component and a heater using the heating component, wherein the heating component comprises two waterproof covers and a heating plate, the two waterproof covers are arranged oppositely, the heating plate is arranged between the two waterproof covers, wiring terminals are arranged at the two ends of the heating plate separately, each wiring terminal is located in the waterproof cover adjacent to the wiring terminal, and the wiring terminals are made of metal. According to the technical scheme, the waterproof effect and use safety of the heater can be promoted.

The invention discloses an assembly type comprehensive-pipe-rack waterproof joint connection structure. The structure is characterized in that connection holes of a pipe rack are formed in the end faces of the two ends of the pipe rack. The joint connection structure includes a sealing joint strip groove, a groove and convex-tongue structure, a maintenance hole, chamfered edges and a prestressingtension anchoring body; splicing seams of the inner and outer chamfered edges are flattened, and moreover, through cooperation of two sealing joint strips and the groove and convex-tongue structure, five waterproof sealing structures are formed at a joint of the pipe rack. The waterproof and water-stopping effects are good, the connection is firm, the service life is long, and installation is convenient.

The invention provides a multifunctional charging pile, and belongs to the technical field of charging. The multifunctional charging pile comprises a charging pile body, wherein a fixed seat is arranged at the bottom of the charging pile body; a first protective cover is fixedly mounted at the upper end of the front surface of the charging pipe body; a display screen is fixedly mounted at a position, which is close to a position below the first protective cover, on the front surface of the charging pile body; and a magnetic card port is formed in a position, which is close to a position belowthe display screen, on the front surface of the charging pile body. By the arrangement of the first protective cover, rainwater is prevented from entering the display screen, the magnetic card port and a control switch; by the arrangement of a second protective cover, a charging gun and a wire are protected; in raining, the charging gun is plugged into a charging gun socket; a first antiskid pad achieves an effect of preventing the charging gun from sliding off; an electric telescopic rod pushes the second protective cover; and under the united action of a first connection piece and a second connection piece, a closed space is formed between the second protective cover and the charging pile body; a sealing pad achieves a sealing effect.

The invention relates to building waterproof construction, and in particular relates to a construction device for a building waterproof layer. The device comprises a trolley, the upper side of the trolley is fixedly connected with a supporting base plate, the upper side of the supporting base plate is fixedly connected with an air source box, an air bottle is arranged in the air source box, one side of the supporting base plate is rotationally connected with a base plate, one end of an electric push-pull rod is hinged and fixed to one side of the air source box, the other end of the electric push-pull rod is hinged and fixed to the base plate, and the electric push-pull rod controls the base plate to rotate along one side of the supporting base plate. According to the invention, a waterproof coiled material is laid through the walking of the trolley. The connection between the laid waterproof coiled materials is good, the waterproof effect of the waterproof coiled material is effectively improved. The device can rapidly replace the waterproof coiled material, the waterproof coiled material can be secondarily heated and rolled after laying is completed, the waterproof coiled material can be well adhered to the surface of a building, and the number of constructors can be reduced while the construction efficiency is improved.

The invention relates to a repairing process for water leakage of a parapet wall. The repairing process comprises the following steps that S1, the wall root of a parapet wall body and the ground are excavated to a structural layer; S2, the groove walls of a horizontal construction groove and a vertical construction groove are coated with waterproof layers, and then waterproof coiled materials adhere to the upper portions of the waterproof layers; S3, a waterproof plate is in lap joint with the horizontal groove wall of a lap joint groove, the waterproof plate is pressed against the positions, located in the lap joint groove, of the waterproof coiled materials, a waterproof skirt edge abuts against the positions, located in the vertical construction groove, of the waterproof coiled materials, and a grouting groove is formed between the waterproof plate and the waterproof coiled materials; S4, slurry is injected into a grouting groove through slurry passing through grooves until the slurry flows out of the last slurry passing through groove; and S5, the abutting side of the waterproof plate and the waterproof coiled materials is sealed, and finally the surface of the waterproof plate and the exposed surfaces of the waterproof coiled materials are coated with protective surface layers. According to the repairing process, the water leakage part of the parapet wall can be well repaired, and the construction efficiency is high.

The invention relates to a permeable hydrophobic multifunctional novel waterproof coating and a preparation method and applications thereof. The permeable hydrophobic multifunctional novel waterproofcoating contains the following components in parts by weight: 30-45 parts of film-forming substances, 4-8 parts of permeable waterproof hydrophobic material, 0.3-0.6 parts of auxiliaries, 0.5-2 partsof osmotic corrosion inhibitor, appropriate amount of pigment, 1-6 parts of thickener, 1-12 parts of reactive diluent, 3-6 parts of flexibilizer, and 30-45 parts of padding, and the use amount of spiro-amine curing agent is 30%-50% of the weight of the film-forming substances. The novel waterproof coating is strong in bonding strength, can be more closely combined with concrete, is more excellentin anti-permeability pressure and anti-permeability waterproof capability, larger in hydrophobic angle, better in waterproof effect and higher in compressive strength, has strong reinforcement and waterproof effects, is especially applicable to concrete ground and wall surfaces with poor structural force, and is high in solid content, green and pollution-free, and excellent in comprehensive performances.

The invention discloses an LED waterproof Christmas lamp. The LED waterproof Christmas lamp comprises a lamp string; the lamp string is formed by serially connecting multiple pairwise adjacent LED bulbs; the outer side of each LED bulb is sleeved with a shell; brackets of LED bulbs in the shell are respectively connected with positive and negative electric wires; the positive and negative electric wires extend out of the bottom of the shell; and PC / PVC / AS shells are fully injected with packing bodies. The bulbs, the chip brackets and the electric wires of the LED waterproof Christmas lamp are sealed through such packing bodies as epoxy resins; and the LED waterproof Christmas lamp is provided with rubber wire main wires, male / female joints injected by an injection molding machine and power supply wires. Further, in order to further enhance the waterproof effect, PE thermal shrinkage sleeves are additionally mounted outside the male / female joints. The LED waterproof Christmas lamp is exposed in air, is not prone to oxidizing and rusting, and achieves the excellent waterproof effect.

The invention belongs to the technical field of assembly type buildings, and particularly relates to a thermal-insulation soundproof assembly type building wall body. In order to solve the problem that noise-reduction soundproof effect of an assembly wallboard in the prior art is poor, the invention discloses the following scheme: the thermal-insulation soundproof assembly type building wall bodycomprises a thermal-insulation frame of a structure in the form of Chinese character hui, wherein the two ends between the top of the thermal-insulation frame and the inner wall of the bottom are fixedly provided with thermal-insulation boards; the two ends of the thermal-insulation are fixedly provided with an inner veneer and outer veneer separately; ends, close to the thermal-insulation boards,of the inner veneer and the outer veneer are separately provided with waterproof paint and waterproof glue; a cavity is arranged between the two thermal-insulation boards; fixed plates which are distributed at equal distance in the vertical direction are fixedly arranged between the two thermal-insulation boards; and foam boards are arranged between the thermal-insulation boards and the fixed plates. According to the thermal-insulation soundproof assembly type building wall body disclosed by the invention, the fixed plates are arched towards one end of the inner veneer, so that external noises are conducted to an arc-shaped surface from the planes of the foam boards to reduce noise influences; and moreover, noises at planar ends of the foam boards are dispersed and propagated through a guide slot, so that noise-reduction effect of the assembly wall body is improved.

The invention discloses a preparation method of silane microencapsulated solid powder waterproofing agent. According to the preparation method, by using hydrophilic polyvinylpyrrolidone and maltodextrin as a wall material, a silane monomer is wrapped in the wall material to form microencapsulated droplets through an emulsification and encapsulation technology, and a spray drying technology is adopted to obtain silane microencapsulated powder, so that the stability of TEOS (tetraethoxysilane) in use is effectively improved; when the TEOS is used for mixing of an aqueous solution of a waterproofcoating, the waterborne microencapsulated wall material can be rapidly dissolved into water to release a silane emulsion, and the silane emulsion is combined with the surface of a cement-based material to form a layer of reticular hydrophobic structure; and after the TEOS is hydrolyzed, formed polysilicic acid performs reaction with calcium hydroxide on the surface of concrete to form C-S-H gel as a secondary hydration product, so that pores of a concrete material are blocked, the surface compactness of the concrete is improved, entrance of CO2 and absorption of water are reduced to the maximum, and the water resistance ability and the carbonization resistance ability of the concrete are improved.

The invention relates to the technical field of bridge accessories, in particular to a dual-waterproof replaceable telescopic device. A telescopic section is arranged in the middle of an upper W-shaped rubber strip, and the upper W-shaped rubber strip can perform heat expansion and cold contraction together with a beam body without being damaged by the beam body through the structure of the telescopic section; pressing blocks for fixing are symmetrically arranged on the two sides of the upper W-shaped rubber strips, and therefore the stability of the upper W-shaped rubber strip is improved, and replacement is convenient; the dual-waterproof effect of the telescopic device is realized through the upper W-shaped rubber strip and a lower U-shaped rubber strip, the waterproof performance is improved; and by means of the upper W-shaped rubber strip and the lower U-shaped rubber strip made of an elastic material, the telescopic device can be suitable for structures with irregular shaped sections, and a positioning assembly is convenient to replace.

The invention relates to a camera module waterproof structure. The camera comprises a lens (1) and a shell (2) fixedly connected with the lens (1), the camera is characterized in that the lens (1) isprovided with a step structure (11), the step structure (11) comprises a first side surface (111) and a second side surface (112) which are connected in sequence, the shell (2) is provided with a matching surface (21) which is connected with the second side surface (112) in a matching manner, and the height of the first side surface (111) is greater than that of the shell (2); and surface rough structures (3) which are matched with each other are arranged on the second side surface (112) and the matching surface (21). According to the camera module waterproof structure, the waterproof effect can be effectively improved, and the matching sealing performance of the lens and the shell is better.

The invention relates to a multi-stage waterproof transformer substation with temperature and humidity regulation and control. The multi-stage waterproof transformer substation with temperature and humidity regulation and control comprises a box body, a supporting seat fixedly installed at the lower end of the box body, a waterproof system, a gap layer, a ventilation layer, a detection system and a control system, wherein the gap layer and the ventilation layer are arranged on the side face of the box body. The supporting seat isolates the box body from the ground. The waterproof system comprises a drainage top cover, a water level valve, a water storage tank, a water guide pipe and a spray head. A ventilation layer is arranged on the side wall of the box body and comprises a plurality of fans, exhaust holes and hole plugs. The detection system comprises a temperature detector A, a humidity detector A, a particle density detector A, a temperature detector B, a humidity detector B and a particle density detector B. According to the multi-stage waterproof transformer substation with the temperature and humidity regulation and control function, the control system controls the waterproof system and the ventilation layer according to the temperature, humidity and dust amount inside and outside the box body, effective water prevention is achieved, rainwater is collected to assist heat dissipation, a fan strengthens heat dissipation, and normal operation of the transformer substation is guaranteed.

The invention discloses a silicone waterproof coating. In parts by weight, the raw materials of the silicone waterproof coating include: 100-120 parts of potassium methyl silicate, 60-80 parts of dimethylsiloxane, 15 parts of silane coupling agent ~20 parts, 15~20 parts of methyl silicone oil, 50~60 parts of nano inorganic powder, 10~30 parts of emulsifier, 20~40 parts of stabilizer, 100~150 parts of diluent, 3~6 parts of thickener; The nano-inorganic powder is composed of the following components in parts by weight: 60-80 parts of nano-silica, 20-30 parts of nano-alumina, 8-10 parts of nano-zirconia, 10-15 parts of nano-hydroxyphosphorus Limestone; the silicone waterproof coating forms a reticular waterproof film on the surface and inside of the wall to improve the waterproof effect. The waterproof film will not close the capillary pores of the base material, and moisture can still escape from the wall to achieve waterproof and breathable effects. , and good weather resistance, long service life of waterproof coating.

The invention discloses a capillary crystalline building waterproofing agent. The waterproofing agent is prepared from, by weight, 10-25 parts of sodium silicate, 3-5 parts of sodium methyl silicate, 2-6 parts of sodium alginate, 4-9 parts of gelatin, 2-5 parts of dodecyl ethoxy sulfobetaine, 1-4 parts of sodium carbonate, 1-4 parts of sodium citrate, 2-4 parts of triethanolamine, 3-7 parts of potassium aluminum sulfate, 3-6 parts of calcium sulfate, 1-4 parts of sodium polyacrylate, 2-5 parts of calcium lignosulphonate, 3-6 parts of carboxymethyl cellulose, 2-6 parts of calcium hydroxide, 1-4 parts of boric acid and 60-80 parts of water. The waterproofing agent disclosed in the invention has the advantages of good waterproofing performance, good durability, good self-healing performance and low cost, and can be used in waterproofing of roofs, basements and toilets.

The invention discloses a brand-new port waterproof structure. The structure comprises a waterproof shell port, a clamp plate arranged corresponding to the waterproof shell port, a clamp plate II clamped corresponding to the clamp plate, and screws for fixing the clamp plate and the clamp plate II. Screw holes are formed in the end faces of the clamp plate and the clamp plate II correspondingly, and a waterproof sealing material is arranged on the inner side end face of the clamp plate. The clamp plate II is arranged on the inner side of the waterproof shell port, the clamp plate and waterproof sealing material are arranged on the outer side of the waterproof shell port, and the screws sequentially penetrate through the clamp plate II, the waterproof sealing material and the clamp plate. The brand-new port waterproof structure has the function of waterproof treatment on the waterproof shell port, improves waterproof performance of equipment, and solves the problem that service life ofthe equipment is shortened due to the fact that water penetrates into a shell from the port as a result of poor waterproof effect and low production efficiency of the existing outdoor electrical equipment during use.

The invention discloses a waterproof construction process for a basement, and relates to the field of building construction. The waterproof construction process for the basement comprises the following steps of S1, cleaning a base layer; S2, performing corner treatment; S3, conducting primer coating; S4, trial laying of a coiled material; S5, heating the surface of the coiled material; S6, pavingand pasting the coiled material; S7, scraping and sealing an interface; S8, pasting lap seams; and S9, constructing a protective layer. The waterproof construction process for the basement has the following advantages that cement mortar is made into a circular arc or a 135-degree break angle at the corner position, so that the waterproof coiled material can be flatly attached to the surface of thebase layer, the phenomena of hollowing and wrinkling are avoided, perfect sealing of all positions is achieved, and the waterproof effect of the whole basement is improved.

The invention discloses a high-waterproof-level box type substation in the field of box type substations. The high-waterproof-level box type substation comprises a box body including an inner box bodyand an outer box body. A cavity is formed between the inner box body and the outer box body. The inner wall of the outer box body and the outer wall of the inner box body are coated with erosion-resistant coatings. A rainproof shed is installed on the top of the outer box body; and a plurality of diversion trenches are formed in the surface of the rainproof shed. A plurality of drainage channelsare formed in the bottom of the cavity between the inner box body and the outer box b ody and are connected to a sewer. The high-waterproof-level box type substation has a good waterproof effect.

The invention belongs to a connecting structure for a flexible vertical assembly partition wall lock catch and waterproof layer. The connecting structure comprises outer plates, a waterproof structure is arranged between the outer plates, the waterproof structure comprises middle connecting plates, an outer connecting plate, an expansion waterproof strip, waterproof cloth and a connecting part, the middle connecting plates are fixed on the surface of the outer plates, the outer connecting plates are fixed to the surface of the outer plates and located at the two ends of the middle connecting plates, the expansion waterproof strips are located between the middle connecting plates, and the waterproof cloth is fixed to the surface of the outer plates through the connecting parts. According to the connecting structure, butt joint splicing is adopted, and the expansion waterproof strip is arranged in the middle, so that the waterproof effect is enhanced while auxiliary fixing is achieved, and the waterproof cloth fixing position is fixed in a wrapping mode.

The invention discloses a connecting structure of a caisson and a partition wall and a construction method of the connecting structure. The connecting structure is characterized in that the connectingstructure comprises the fully-prefabricated caisson, the prefabricated partition wall and a floor slab. The floor slab comprises a floor slab prefabricating layer and a floor slab cast-in-situ layer.The caisson comprises a side plate and a bottom plate. The side plate of the caisson is in the same vertical plane with the prefabricated partition wall. The end part of the floor slab prefabricatinglayer is placed on the upper surface of the side plate of the caisson. A cast-in-situ reverse ridge is arranged at the position, located in the vertical plane, above the floor slab. The cast-in-situreverse ridge and the floor slab cast-in-situ layer are one-batch formed through cast-in-situ. The caisson is internally provided with a plate bottom rib and an additional plate surface rib. The platebottom rib and the additional plate surface rib enter the floor slab cast-in-situ layer through a bending anchor. By means of the connecting structure, application of a toilet caisson structure in anassembled building is enhanced, the waterproof effect of the assembled toilet caisson is improved, the use space of a toilet is enlarged, and requirements of industrialized production can be met.

The invention discloses a semi-flexible and semi-rigid double-layer liner shield tunnel deformation joint structure. The structure comprises segments and linings, and laminated structural connection is formed between the segments and the linings in a non-deformation joint section; in a deformation joint section, the segments is continuously provided with N segment deformation joints at a predetermined length L at each interval, and N is an integer greater than or equal to 1; in positions corresponding to deformation joints of the segments, the linings are provided with lining small sections, lining deformation joints are arranged at the junction of the lining small sections and adjacent non-deformation joint sections, and the lining deformation joints and the segment deformation joints arearranged longitudinally in a staggered mode; and the invention further discloses a shield tunnel. According to the semi-flexible and semi-rigid double-layer liner shield tunnel deformation joint structure and the shield tunnel, the longitudinal rigidity of the deformation joints is higher than that of conventional flexible deformation joints, the opening amount of the segment joints can be reduced effectively, and the waterproof effect of a double-layer lining structure is improved; N segment deformation joints are arranged at the deformation joint sections to jointly share the opening amountof the segment joints; and the segments and the lining deformation joints are staggered in space, and the transverse shear can be resisted effectively to prevent slab staggering.

The invention discloses a waterproof coiled material with bactericidal effect and a preparation method, belonging to the technical field of waterproof coiled materials. The waterproof coiled material comprises a base layer, a first bactericidal layer arranged on the upper surface of the base layer and a first waterproof layer arranged on the lower surface of the base layer, the upper surface of the first sterilizing layer is provided with a second waterproof layer, and the second waterproof layer is arranged on the upper surface of the base layer. A protective layer is provided on the upper surface of the layer, a second bactericidal layer is provided on the lower surface of the first waterproof layer, and a PE protective layer is provided on the surface of the second bactericidal layer. Wherein, the first and second waterproof layers are both SBS modified asphalt self-adhesive waterproof layers, and the first and second bactericidal layers are both TiO2 / graphene modified polyurethane nano-bactericidal coatings. The waterproof coiled material can effectively avoid the growth of bacteria on the waterproof coiled material, and has a good bactericidal effect, and the preparation method has simple process, mild conditions and good application prospects.

The invention relates to a waterproof construction method for an open-cut semi-reverse construction method tunnel enclosing purlin node. The waterproof construction method comprises the following steps of before a foundation pit is excavated, firstly constructing an enclosure structure, cutting a groove below the bottom of an enclosing purlin to construct a tripod, and then laying a first waterproof roll; constructing the enclosing purlin and a support connected with the enclosing purlin, and continuously excavating the foundation pit downwards after the enclosing purlin is constructed; in there-construction stage, constructing first plain concrete, and laying a second waterproof roll; constructing a first lining wall structure, and correspondingly constructing second plain concrete; andlaying a third waterproof roll, and constructing a second lining wall structure at the position, corresponding to the first lining wall, above the enclosing purlin. According to the open-cut semi-reverse construction method tunnel enclosing purlin node full-wrapping waterproof construction method, the connection between the enclosing purlin and the enclosure structure can be firm, meanwhile, the waterproof rolls are prevented from being pierced by connecting steel bars, and the waterproof effect is improved.

The invention discloses a preparation method of a fluoride-free waterproof agent. The preparation method comprises the following steps of a, mixing an organic solvent, a catalyst and water, and addingtetraethyl orthosilicate and silane to obtain a mixed solution; and b, mixing the mixed solution, an alkane derivative with the carbon atom number of more than or equal to 10, an emulsifier, an initiator and water to obtain the fluoride-free waterproof agent. According to the method, through tight combination of inorganic materials and organic molecules, secondary roughness can be constructed onthe rough surface of a fabric, the surface tension of the fabric is reduced, and the waterproof effect of the fabric is improved; and besides, the adhesive force between the waterproof agent and the surface of the fabric is high, excellent waterproof performance can be kept for a long time, and the market prospect is extremely high.

The invention belongs to the technical field of coatings, and particularly relates to an anti-sagging polyurethane-modified asphalt waterproof adhesive coating for side walls. The coating comprises the following components in parts by weight: 30-60 parts of polyurethane-modified acrylate emulsion, 20-30 parts of modified emulsified asphalt, 20-30 parts of anti-aging modified filler, 0.5-1 part ofdefoaming agent, 0.1-0.5 part of cellulose, 1-3 parts of drying accelerator and 0-10 parts of deionized water. According to the waterproof adhesive coating, the polyurethane-modified acrylic emulsionserves as a matrix emulsion, the high and low temperature resistance of the matrix emulsion is superior to that of the acrylic emulsion, asphalt is added in the form of the modified emulsified asphalt, mixing and dissolving of the asphalt and a system are better facilitated, and the waterproof effect, the adhesion to a wall and the aging resistance can be effectively improved in cooperation with the anti-aging modified filler.