97results about How to "High recyclability" patented technology

The invention relates to a hybrid energy storage system comprising various energy storage carriers. The system is mainly based on an ordered energy control strategy, the energy storage carriers are selectively discharged in a current-limiting or power-limiting mode through a pulse width modulation (PWM) closed-loop control principle and a monitoring system selective control principle, the advantages of the energy storage carriers are combined and complemented, the disadvantages of the energy storage carriers are overcome, and the aim of ordered energy utilization of different energy storage carriers is fulfilled according to a discharge priority sequence, namely a third energy storage subsystem, a second energy storage subsystem and a first energy storage subsystem. By the hybrid energy storage system, the phenomenon that the power of a power grid fluctuates because a wind and light power generation system or a high-power load and the like are connected to the power grid is avoided, smoothing compensation is realized, the quality of electric energy is improved, and the stable operation of the power grid is ensured.

The invention discloses a water meter which comprises a water meter mechanical body, a copper cover and an outer cover. An upper cover is arranged on the outer cover. The water meter further comprises a connecting piece for connecting the copper cover with the outer cover. The connecting piece is fastened on the copper cover through screws. A buckling device is arranged between the outer cover and the connecting piece. By means of the water meter, the mode that an additionally-installed part of a traditional mechanical water meter is directly fixed to the copper cover through the screws is changed, the additionally-installed part is connected in a buckling type connecting mode, rapid clamping and rapid separating between the additionally-installed part and a mechanical part are achieved, and the assembling and disassembling speed of the additionally-installed part is increased.

The invention discloses a resin-based reinforced fiber compound core, an overhead conductor and a manufacturing method of the resin-based reinforced fiber compound core. The resin-based reinforced fiber compound core comprises reinforced fibers and thermoplastic resin, the reinforced fibers are bonded and solidified in the thermoplastic resin, the reinforced fibers comprise longitudinally arranged fibers and twined fibers, and the twined fibers are twined or woven outside the longitudinally arranged fibers in a spiral mode. The overhead conductor comprises the resin-based reinforced fiber compound core and an aluminium conductor arranged on the outer side in a twisting mode, and is formed through the working procedures of tension stringing, resin impregnation, surplus resign removing, preforming, lapping, extrusion and pulling forming, on-line sintering, twisting and wire forming and reel forming. Through the mode, according to the resin-based reinforced fiber compound core, the overhead conductor and the manufacturing method of the resin-based reinforced fiber compound core, the recoverability rate of the resin is high, the radial and longitudinal mechanical properties of the resin-based reinforced fiber compound core is enhanced, the manufactured overhead conductor is good in tensile strength and bending resistance, and production efficiency is high.

The invention discloses a polymer section and a preparation method thereof. The polymer section is prepared by mixing the following raw materials in parts by weight: 40-85 parts of recovered PU (polyurethane) / PVC (polyvinyl chloride) bag leather waste granule, 10-55 parts of plastic resin, 1.0-1.5 parts of coupling agent, 1.2-2.0 parts of EVA (ethylene vinyl-acetate copolymer), 1.5-2.0 parts of stearic acid and 1.5-2.0 parts of lubricant. The preparation method of the polymer section comprises the following steps: pulverizing the recovered PU / PVC bag leather waste, adding the plastic resin, evenly mixing, sequentially adding the coupling agent, EVA, stearic acid and lubricant, evenly mixing, granulating and extruding. The polymer section disclosed by the invention not only has the advantages of favorable water resistance and strength of plastics, but also has the advantages of favorable processability, no toxicity and environmental protection of wood. The polymer section has natural tactile sensation of wood, can not be easily damaged by mold or termites, has the characteristics of high weatherability and high compression strength, and can be used in the fields of building materials, packaging, transportation, decoration and the like.

A high altitude pouring steel column internal concrete operating platform frame belongs to the technique field of the auxiliary equipment of the building structure construction. The platform frame comprises a tool falsework platform and is characterized in that a clamping bolt is provided. The tool falsework platform is laid on a steel girder which is used for facilitating to pour at least two concrete in the steel column. The clamping bolt is used for permanent connection between the tool falsework platform and the steel girder. The invention can simplify the high-difficult and high-dangerous high altitude operation to the ground. The use time of the tower crane is reduced and the ground is saved. The steel tube and buckle and the like are all common material in construction. The invention has the advantages of high recovery and use percentage, convenience to the constructor, alleviation to the labor intensity, increased construction efficiency, increased security, low cost and excellent economic property.

The invention relates to a preparation method of a bio oil-phenol-methanal copolycondensation resin wood adhesive, belonging to the technical field of fine chemistry and high polymer materials, which comprises the following steps of filtering and refining bio oil to prepare the refined bio oil; adding sulfur and sodium hydroxide solution to the refined bio oil; stirring, heating and reacting to prepare the modified bio oil; and adding phenol and a catalyst to the modified bio oil to prepare the adhesive after reacting. In the method of the invention, the bio oil is taken as a substrate to synthesize the adhesive for wood, and the content of the bio oil is 50 to 60% of the total content of the adhesive. The prepared adhesive has the advantages of high mechanical strength, good waterproof performance and aging resistance, and can be used for preparing the products in high accessories of outdoor stage plywood, particle boards, fiberboards, layer base materials and the like. Moreover, thepreparation technology for pyrolyzing the bio oil wood adhesive is simple and fast, and the resins have the advantages of strong adhesion performance and long storage life.

The invention relates to novel environment-friendly waterproof and oil-proof paper and a preparation method thereof, belonging to the field of paper materials. The novel environment-friendly waterproof and oil-proof paper comprises a common paper layer and coating layers, wherein the upper face and the lower face of the common paper layer are respectively and evenly coated with the coating layers;the coating layers are respectively prepared from the following materials by weight percent: 2-10% of modified starch, 0.5-5% of a wet strength agent, 0.2-5% of an oil-proofing agent, 0.3-5% of a paper-making sizing agent and 75-97% of water; the waterproof and oil-proof coating layers are prepared by mainly taking the modified starch as a surface sizing agent and cooperatively using a small amount of the wet strength agent, oil-proofing agent and paper-making sizing agent; the waterproof and oil-proof coating layers are good in adhesiveness on the surfaces of the paper, can form films on thesurface of the paper and fills the gaps between fibers; therefore, the surface and internal conditions of the paper are improved to the different extents, and the water resistance, oil resistance andmechanical properties of the paper are improved to the different extents.

The invention provides an intelligent classifying garbage can which comprises a can body. An intelligent control system is arranged in the can body. The intelligent control system comprises a master control module, a display module, an opening and closing control module, a data center module, a power module and a voice identification module which are electrically connected. Meanwhile, an intelligent control method combined with the intelligent control system serving as the basis is provided. The can body comprises four containing cans having an independent opening and closing function. Each containing can comprises a garbage can cover and a garbage inner can. Different garbage classification logos are arranged on the outer surfaces of the garbage can covers (a, b, c and d), and handles areassembled correspondingly. Due to four classifying classes, the intelligent classifying garbage can is more complete in classification compared with classification of a common garbage can, the voiceidentification module can identify a voice command and execute opening and closing of the garbage can, due to an automatic can cover bouncing off and closing manner, people are also prevented from making direct contact with bacteria generated by garbage, and cleanliness, sanitation and healthiness are achieved; and due to the containing cabinet type appearance, the garbage can can be more easily integrated in the home environment, and attractiveness and coordination are achieved.

The invention discloses a method of adopting a tool type clamp to support a ground beam template side molds, which comprises the following steps: (a) erecting two side molds of a ground beam provided with outer longitudinal ridges on a floor mold according to a ground beam positioning line; (b) installing a screw rod of the clamp at the tops of the ground beam side molds and enabling two longitudinal rods of the clamp to be respectively arranged on the outer sides of the outer longitudinal ridges of the ground beam side molds; (c) adjusting the two longitudinal rods of the clamp to be aligned with different pin holes of sliding rods corresponding to the longitudinal rods, inserting positioning pins into the pin holes to perform fixing, and enabling reinforcing sleeve pipes arranged on the sliding rods and the outer longitudinal ridges arranged on the lowermost portions of the ground beam side molds to be at the same position; and (d) rotating a lead screw in threaded connection with two horizontal rods of the clamp, and enabling the two longitudinal rods and fixing sleeve pipes to be respectively squeezed closely with the outer longitudinal ridges of the ground beam side molds. The method of adopting the tool type clamp to support the ground beam template side molds is high in adaptability, reduces investment cost and is suitable for construction of a cast-in-place reinforced concrete ground beam.

The invention provides a method for preparing CLT acid by using liquid-phase 6-chloro-3-nitrotoluene-4-sulfonic acid (CLT) in a continuous hydrogenation reduction process. The method comprises the following steps of: using Pd / Al2O3 as a catalyst in a fixed bed reactor; performing hydrogenation reduction on the liquid-phase 6-chloro-3-nitrotoluene-4-sulfonic acid in the manner of continuously feeding and discharging through the catalyst to obtain the CLT acid, wherein the Pd / Al2O3 catalyst uses a columnar structure alumina or spherical alumina as a carrier, the surface of the catalyst is loaded with an active component metal palladium (Pd), and the load mass of the active component Pd is 0.05-10% of the mass of the carrier. Compared with the prior art, the method provided by the invnetion has the advantages of high conversion rate of the hydrogenation reduction reaction, few side reaction, long service life of the catalyst, low environmental pollution, good application prospect and great economical benefit.

The invention discloses a device and method for reinforcing a foundation through vacuum preloading-electroosmosis-heating combined biological enzymes. An electric heating film, a hollow round pipe, anouter wrapping core plate and a filter film are arranged in a conductive heating plastic drainage plate, a plurality of metal wires are arranged in the hollow round pipe, drainage holes are formed inthe hollow round pipe at equal intervals in the length direction, the metal wires are connected into a wire network according to the cathode and the anode of the drainage plate correspondingly, the wire network is located in a sealing coating and penetrates through a sealing ditch to be connected with a waterproof plug, the waterproof plug is connected with a direct-current power supply through awire, and the direct-current power supply is connected with an air energy generator through a wire; the conductive heating plastic drainage plate is arranged in soil of a soil body to be reinforced,a plurality of soil moisture measuring instruments and temperature sensors are arranged around the conductive heating plastic drainage plate, the hollow round pipe is connected with a horizontal filter pipe, and the horizontal filter pipe is connected with a vacuumizing device; and a pressurized dissolved solution pumping pipe is arranged in the center of four plastic drainage plates.

The invention discloses a light partition wall which comprises unit brickworks (1), a fastener screw cap (2), a fastener bolt (3), an assembled fastener body (4) and an I-shaped metal frame (5), wherein the assembled fastener body (4) is a T-shaped structural part, a hole is arranged on the assembled fastener body (4), the fastener screw cap (2) is provided with an inner wire per se, the screw cap (2) and the fastener bolt (3) are matched with each other to fix the assembled fastener body (4) onto the I-shaped metal frame (5) so as to form into a plurality of spaces capable of independently containing the unit brickworks (1), and the plurality of unit brickworks (1) are filled into the spaces to form the light partition wall. The screw cap (2) and the fastener bolt (3) are matched with each other to be fixed on the I-shaped metal frame (5) so as to form a hooking and fastening end, and the assembled fastener body (4) is hooked and fastened to the hooking and fastening end through the hole on the assembled fastener body. According to the light partition wall, the cyclic utilization rate of the material can be improved, the facing construction difficulty on the surface of the light partition wall can be reduced, and the common quality problems of the conventional gypsum brickwork can be avoided.

The invention discloses a preparation method of a mesoporous carbon / graphene oxide compound. The preparation method comprises the following steps: weighing asphalt and an additive, mixing the asphaltand the additive at a mass ratio of (1 to 10) to (10 to 1), then, adding solvent of 1-10 times of mass into a mixture, stirring, evenly mixing, distilling the solvent, then, putting in an oven to bedried, and then, preparing the mesoporous carbon / graphene oxide compound through a carbonization and oxidization technology. An in-situ growth method is adopted, graphene does not need to be preparedin advance, and the prepared mesoporous carbon / graphene oxide compound has a relatively high specific surface area, good adsorption performance on dye and heavy metal and high recyclable rate, wherein the specific surface area is 150-700m<2> / g, and a graphene degree is 30-50 percent. In addition, the preparation method has the advantages of rich raw material, low price, simpleness in operation and easiness in realizing industrial production.

The invention discloses a precise shaping device of a tip end of a coronary guide wire, and belongs to the field of medical equipment. The device comprises a lower base body, and an upper base body rotationally hinged to one end of the lower base body through a rotating shaft; a lower bending part is arranged in the lower base body; an upper bending part matched with the lower bending part for bending the tip end of the coronary guide wire as a needed angle is arranged in the upper base body; the lower bending part has a bending convex angle of theta 1; correspondingly, the upper bending part has a bending concave angle of theta 2; theta 2 is equal to 360 degrees minus theta 1; and theta 1 is smaller than 180 degrees and not smaller than 90 degrees. The device can precisely shape the length and the angle of the tip end of the coronary guide wire, and can reasonably control the bending length and angle of the tip end of the coronary guide wire according to different branch diameters and angles of heart blood vessels of patients, so that the tip end of the coronary guide wire can be smoothly inserted in an appointed branch blood vessel. The device is convenient to carry, simple and fast in operation, safe, reliable, low in cost, high in recycling rate and broad in market application prospect.

The invention discloses an My / LaxSr(1-x)Ti(1-y)O3 catalyst as well as a preparation method and an application thereof. The chemical formula of the catalyst is My / LaxSr(1-x)Ti(1-y)O3, wherein M is a precious metal doped active component, LaxSr(1-x)Ti(1-y)O3 is an oxide support, x ranges from 0.05 to 0.95, and y ranges from 0.01 to 0.1. The oxide support is of a 3D ordered mesoporous perovskite structure, and the precious metal doped active component is uniformly supported on the oxide support. The preparation method comprises the following steps: a metal precursor mixed system is mixed with hard template microspheres, the mixture is subjected to high-temperature calcination, and a LaxSr(1-x)Ti(1-y)O3 catalyst precursor is obtained; then reduction treatment is performed, and the My / LaxSr(1-x)Ti(1-y)O3 catalyst is prepared. The preparation process of the catalyst is simple and controllable, the precious metal doped active component is uniformly dispersed on the catalyst surface, and the catalytic activity is high.

The invention relates to a material structure for a cover board of an automobile storage box, which comprises a surface blanket and a base material; the surface blanket and the base material are compounded together by high-temperature extrusion. The material structure is suitable for automobile decoration. The surface blanket is made of PET; the style of the surface blanket is a needling non-woven; and the surface blanket can beautify a luggage case. The base material is made of a PP honey comb board; and the base material can increase the rigidity of products. The material structure for the cover board of the automobile storage box is a novel product which has the advantages of light weight, environmental protection and recycling.

A foundation steel pile for a solar photovoltaic power station comprises a vertical steel pipe, wherein the top end of the steel pipe is connected with a flange disc, the middle of the steel pipe is connected with radial positioning steel plates, the middle lower portion of the steel pipe is connected with left and right positioning steel bars, and the lower portion of the steel pipe is connected with front and back positioning steel bars. The foundation steel pile for the solar photovoltaic power station can replace an existing concrete foundation and a spiral steel pile foundation, can be applied in a modularized mode, is high in pile sinking speed, is wide in adaptability, is safe and reliable, is durable, and shortens construction time.

The invention discloses a composite resin film with good light screen printing effect and a preparation method thereof. The film comprises a light screen-printed layer, a core layer and a heat-sealing layer. The light screen-printed layer comprises the following raw materials: isotactic polypropylene, aliphatic polyimide, polyurethane, polyarylsulfone and polycaprolactam. The core layer comprises the following raw materials: isotactic polypropylene, polyphenyl ether, polyethylene naphthalate and an antistatic agent. The heat-sealing layer comprises the following raw materials: polycarbonate, amino resin, polyhydroxybutyrate-pentanoate, polyvinyl chloride and a slipping agent. According to the preparation method, a three-layer co-extrusion process is employed; production speed and screw speed are controlled; the light screen-printed layer is extruded from an auxiliary extruder 1 at a temperature of 225 DEG C; the core layer is extruded from a main extruder at a temperature of 250 DEG C; and the heat-sealing layer is extruded from an auxiliary extruder 2 at a temperature of 225 DEG C. The light screen-printed film prepared in the invention has improved polarity and anti-static property and presents better light screen printing effect in printing.

The invention belongs to the technical filed of photocatalysis and particularly provides a Bi (III)-metal-oxygen cluster inorganic framework as well as a preparation method and an application thereof. The Bi (III)-metal-oxygen cluster inorganic framework is applied to the field of photocatalytic degradation of organic dyes, and the chemical formula of the inorganic framework is [PMo12O40Bi2(H2O)2].4H2O. The Bi (III)-metal-oxygen cluster inorganic framework is prepared with a solvothermal method, the process is simple, the purity is high, and the reproducibility is good; further, Bi resources in China are rich, polyacid raw materials are safe, non-toxic, cheap and available, the catalytic activity of metal-oxygen clusters modified with Bi (III) is improved obviously, and accordingly, the Bi-containing metal-oxygen clusters have broad prospect in the field of photocatalysis research. The Bi (III)-metal-oxygen cluster inorganic framework without grinding can be directly used in a photocatalytic degradation experiment, complete separation can be realized through simple filtering, the circulation utilization rate is high, the defects of difficulty in separation, high probability of loss of active components, low circulation utilization rate and the like of a traditional POMs (polyoxometallates) photocatalyst are overcome, and industrial application is facilitated.

The invention discloses a carbon-doped MoS2 / CoP / C composite antibacterial material, a preparation method and application thereof, and belongs to the technical field of material preparation and antibacterial materials. The method comprises the following steps: (1) uniformly stirring carbon nanospheres, cobalt nitrate hexahydrate, urea and water to obtain a mixed solution, putting the mixed solution into a reaction kettle, then putting the reaction kettle into a drying oven, and carrying out a hydrothermal reaction; (2) centrifuging, washing and drying the mixed solution obtained by the hydrothermal reaction to obtain solid powder; (3) putting the solid powder and sodium hypophosphite into a tubular furnace, and calcining in a nitrogen atmosphere to obtain carbon-doped CoP / C; (4) adding CoP / C, thioacetamide and sodium molybdate into a beaker, uniformly stirring to obtain a mixed solution, putting the mixed solution into a reaction kettle, then putting the reaction kettle into a drying oven, and carrying out a hydrothermal reaction; and (5) centrifuging and washing the mixed solution obtained by the hydrothermal reaction, and drying to obtain the carbon-doped MoS2 / CoP / C composite antibacterial material. The composite material is excellent in antibacterial performance, short in reaction time and low in experiment cost, and has great industrial application potential.

The invention discloses active nano-particles for degrading organophosphorus, as well as a preparation method and applications of the active nano-particles. According to the technical scheme, by constructing engineering bacteria expressing beta-keto-thiolase, acetoacetyl CoA reductase, fusion protein of organophosphorus acid anhydride hydrolase and polyhydroxyalkanoate synthetase, and fusion protein of organophosphorus acid anhydride hydrolase and polyhydroxyalkanoate binding protein, the obtained engineered organophosphorus acid anhydride hydrolase is fixed to the surfaces of the polyhydroxyalkanoate nano-particles in a combined manner through two methods including covalence and non-covalence, the nano-particles with the activity of degrading the organophosphorus is efficiently produced at one step through a fermentation method, and the high stability and recycling effect are achieved. Compared with the traditional enzyme immobilization method, the method provided by the invention hasthe advantages that the zymoprotein and the carrier for immobilization do not need to be respectively prepared, the production of the immobilization particles can be completed through one step, and the production cost is low. The active nano-particles have wide applications in the aspects of the purification for pesticide residue of fruits and vegetables and the treatment for the environmental pollutants.

The invention discloses a carbon-doped nickel phosphide composite antibacterial material and a preparation method and application thereof. The method comprises the following steps of (1) adding carbon nanospheres, nickel nitrate hexahydrate, urea and water a beaker, stirring the above to be uniform, and obtaining a mixed solution; (2) adding the mixed solution into a reaction kettle, and putting the reaction kettle into a drying oven for hydrothermal reaction; (3) centrifuging, washing and drying a mixed solution obtained by the hydrothermal reaction to obtain solid powder; and (4) putting the solid powder and sodium hypophosphite into a tubular furnace, and calcining in a nitrogen atmosphere to obtain the carbon-doped nickel phosphide composite antibacterial material. The large specific surface area of the carbon nanospheres in the obtained composite material endows the composite material with more reaction active sites, and the existence of reactive oxygen free radicals greatly improves the antibacterial activity of the composite material, so that the composite material shows efficient antibacterial performance no matter under the dark condition or under the irradiation of sunlight.

The invention relates to a multifunctional trash can. The multifunctional trash can comprises a can body, a dustpan, a mop and a broom. The multifunctional trash can is characterized in that clamping slots for fixing the mop and the broom are formed in two sides of the can body; a movable separating plate is arranged in the can body and divides the trash can into three independent spaces; a circular feeding opening is formed under the can body; the dustpan is inverted above the can body to form a cover which is controlled to open and close through a pedal. The trash has the advantages of being novel in structure and multifunctional.

The present invention discloses a safety switch of a washing machine. The safety switch comprises a pedestal box, an upper reed and a lower reed which are fixedly arranged in the pedestal box, and a lifting rod and a swing rod which are respectively connected with the upper reed and the lower reed; the pedestal box comprises an upper cover and a pedestal; the lifting rod and the swing rod are rotatably disposed on the pedestal through a lifting rod shaft and a swing rod shaft respectively; and the pedestal, the lifting rod, the swing rod and a contact adjusting screw are all prepared by plastic materials. The pedestal, the lifting rod, the swing rod and the contact adjusting screw are all prepared by the plastic materials, cost is saved, recoverable utilization rate is high, and the safety switch is environment-friendly. Assembly operation is simple in technology, no press machine is required on a production assembly line, and the safety switch is easy to assemble. Due to the fact that the pedestal box is assembled by the upper cover and the pedestal, only the contact adjusting screw is required to be adjusted when a contact distance is changed, the safety switch is easy to debug, and stable debugging quality can be ensured.

The invention relates to a C / Co3O4 / BiVO4 composite photo catalyst and a preparation method and application thereof, and belongs to the technical field of preparation of environmental materials. The preparation method is characterized in that a hydrothermal method and a hydrolysis method are treated as the technological means for preparing the C / Co3O4 / BiVO4 composite photo catalyst; saccharomyceteis used for preparing a carbon material which has the characteristic of being capable of transferring electrons, and on that basis, the activity of the photo catalyst can be further improved, so thatthe purpose of efficiently degrading tetracycline in wastewater can be achieved; and moreover, the magnetic material Co3O4 is introduced to prepare the C / Co3O4 / BiVO4 composite photo catalyst, so thatthe cost is decreased, and the recycling performance of the photo catalyst is improved. With the adoption of the photo catalyst, the photo catalyzing activity is greatly improved, and moreover, the recycling rate is effectively increased; and the secondary environmental pollution of the photo catalyst in a solution can be avoided.

The invention discloses a foundation pit drainage and protection system capable of being assembled and recycled. The foundation pit drainage and protection system comprises horizontally-arranged drainage devices arranged at the two ends of a concrete pavement of a foundation pit, a water retaining device is arranged between the drainage device arranged at the upper end of the foundation pit and the foundation pit, and the drainage devices and the water retaining device are all factory prefabricated members. By means of the drainage devices and the water retaining device prefabricated in a factory, the drainage devices and the water retaining device can be utilized repeatedly, the utilization rate of materials can be increased, and the building time and the dismounting time of the drainage devices and the water retaining device can be shortened. U-shaped or inverted-trapezoid-shaped drainage grooves are adopted in the system, so that manufacturing is facilitated, the drainage amount is large, and water can be drained fast. Steel pipes are arranged at the bottoms of protection rods, threads are arranged on the outer portions of the steel pipes, and therefore the protection rods can be screwed in and out of a retention wall conveniently, labor hours are shortened, and meanwhile repeated utilization of the protection rods is achieved. The whole drainage and protection system is simple in structure, the repeatable recycling rate of all components is high, and effective drainage of underground construction can be achieved.

The invention discloses a construction method for a mountable recyclable foundation pit drainage and protection system. The construction method comprises the following specific steps that a concrete pavement is laid on the slope surface of a foundation pit, and a concrete slope protection coping is laid at the top of the foundation pit; after the side, away from the foundation pit, of the slope protection coping is tamped through plain soil and flattened, a prefabricated water retaining device is arranged; a foundation trench is excavated in the side, away from the foundation pit, of a water retaining wall, and the size of the foundation trench is adapted to that of a prefabricated drainage device; the drainage device is arranged in the foundation trench; and after construction is completed, a drainage tank and the water retaining wall are sequentially dismantled, so that recycling and reutilization are achieved. According to the construction method for the mountable recyclable foundation pit drainage and protection system, the drainage tank is in a U shape or an inverted trapezoidal shape, manufacturing and draining are convenient, and the drainage amount is large, so that rapid draining of water is facilitated; and effective drainage of underground engineering can be achieved due to the fact that the construction method for the whole drainage and protection system is simple in structure, convenient to construct and high in repeatable recycling utilization rate of all the parts.

The invention relates to a high-intensity retractable support. An upper bottom board is fixedly installed at the upper portions of a middle beam of the U-shaped support, each side beam of the U-shaped support and each shed leg of the U-shaped support. The two ends of the middle beam of the U-shaped support are respectively provided with a middle beam slope. The bottom of each side beam of the U-shaped support is provided with a side beam slope. The upper end of each side beam of the U-shaped support is provided with a side beam upper notch. The upper end of each shed leg of the U-shaped support is provided with a shed leg upper notch. A side beam cushion block is arranged at the position, where the middle beam of the U-shaped support and each side beam of the U-shaped support are connected, of the side beam of the U-shaped support. A first cushion block connecting and clamping cable is movably installed at each lower end face of the middle beam of the U-shaped support and the outer side of the corresponding side beam cushion block. A shed leg cushion block is arranged at the position, where each side beam of the U-shaped support is connected with the corresponding shed leg of the U-shaped support, of the shed leg of the U-shaped support. A second cushion block connecting and clamping cable is movably installed at the lower end face of each side beam of the U-shaped support and the outer side of the corresponding shed leg cushion block. The high-intensity retractable support is simple in structure, convenient to operate, high in intensity and capable of being recycled, the service life of the support is largely prolonged, and the support has good social benefits and economic benefits.

Disclosed is a full-assembly type SBSG shear connection steel-concrete composite beam that comprises a steel beam and a prefabricated concrete bridge deck, a plurality of steel bolts are fixedly distributed on the top of the steel beam, at least one vertical section of each steel bolt is of a big-end-up structure which is gradually transited, matching grooves with openings in the lower portions are distributed in the lower portion of the prefabricated concrete bridge deck. Each matching groove matches the steel bolt in shape on the vertical section; the invention has reliable shear resistance and pulling resistance, and reliable connection of the bridge deck and the steel beam is achieved without cast-in-place combined concrete; the steel bolts on the top of the steel beam and the matching grooves can adopt steel structures, the requirement for the embedded installation precision of the bridge deck and the top of the steel beam on a bridge site is easily met, a special anti-pulling connecting structure is avoided, the structure is obviously simplified, the embedded installation of the steel bolts and the matching grooves allows a large gap (filling a combination material), and the requirement for the installation precision is obviously reduced; the field workload is obviously reduced, and the reliability of the combined structure is correspondingly improved.