42results about How to "Has the ability to resist deformation" patented technology

The invention relates to an environment-friendly durable monolayer lining structure applicable to a soft surrounding rock tunnel. The inner wall surface of the excavated soft surrounding rock tunnel is sequentially provided with sprayed concrete mixed with basalt fibers, a monolayer lining consisting of corrugated plates, a plurality of anchor rods arranged on a rock stratum from outside to inside, a reinforcing mesh and outer-layer concrete which is sprayed onto the reinforcing mesh and mixed with the basalt fibers. The monolayer lining structure is characterized in that drain pipes are arranged on the corrugated concave parts of the outer side of each corrugated plate, a non-woven fabric is laid on the outer surface of each corrugated plate, and a filtering material is used for filling gaps in the corrugated concave parts. The annular corrugated plates which are matched with the concrete on the inner wall of the tunnel are formed by connecting a plurality of corrugated plate bodies,and the overlapped part between every two adjacent corrugated plates are fixedly connected by bolts. The structure has the advantages that the stress condition is reasonable, the deformation resistance capacity and the pressure bearing capacity are excellent, the waterproof effect is great, a construction process is simple, the costs for construction, later-stage operation and maintenance are low,the resources are saved, economic benefits and environmental protection benefits are remarkable, and the application prospect is broad.

The invention discloses a waterproof type single-layer lining structure applicable to a fourth level surrounding rock double-line track. The waterproof type single-layer lining structure applicable tothe fourth level surrounding rock double-line track comprises fourth-level surrounding rocks subjected to smooth blasting treatment and further comprises omega-shaped spring drainage half pipes and anchored rods arranged in the fourth-level surrounding rocks in a struck manner. The anchored rods are perpendicular to the rock surfaces of the fourth-level surrounding rocks. The rock surfaces of thefourth-level surrounding rocks are further subjected to washing, injection of a first layer crude fiber concrete and curing, injection of mortar and curing, spraying of a waterproof material and curing, ejection of a second layer fine fiber concrete and curing in sequence. According to the waterproof type single-layer lining structure applicable to the fourth level surrounding rock double-track tunnel involved, force bearing of the single-layer lining structure formed by the technology is uniform; the structure has certain deformation resistant capacity; the construction technology is simple;the construction period is short; construction pollution is reduced; the structure is low-carbon and environment-friendly and widely applied to projects of fourth-level surrounding rock double-tracktunnel lining structures.

The invention discloses a guide wire. The guide wire comprises a far end (1), a near end (2) and a core wire (3), the core wire (3) is arranged in the guide wire and extends to the far end (1) from the near end (2) of the guide wire, and a safety net (4) is arranged at the head end, located at the far end (1), of the core wire (3) and fixedly connected with the head end. The invention further provides a preparation method of the guide wire. Accordingly, by additionally arranging the safety net at the head end, located at the far end, of the core wire, the cross section area of the guide wire far end is increased, the loss of guide wire toque force and torque transmission is reduced, and the flexibility and deformation resistance of the guide wire far end are guaranteed while the drifting phenomenon is eliminated.

The invention relates to the field of ship outfitting, in particular to a novel aluminum alloy skirting line plate. The novel aluminum alloy skirting line plate is mainly composed of a main face plate and a cover plate. A press strip is arranged on the lower portion of the main face plate, a position, clinging to the ground, of the main face plate is provided with an arc angle, a mounting notch is formed in the main face plate, a nailing line is designed inside the mounting notch, and the cover plate can be rapidly clamped with the main face plate through the mounting notch to have mounting screws hidden. Due to adoption of a manufacturing process of extrusion forming of a mould, deformation-resistant overall linearity is achieved; the novel aluminum alloy skirting line plate can be in better combination with a rubber and plastic carpet, so that the purpose that ship decoration is fireproof and dampproof can be achieved, and attractiveness of the whole skirting line plate is guaranteed; by the unique structure, a mounting method can be simplified, cost can be saved, and an aluminum alloy section structure enables the novel aluminum alloy skirting line plate to be easy for mass production.

The invention discloses an SCS (steel concrete steel) bridge deck with internal vertical J-shaped connecting structures. The SCS bridge deck comprises a bottom plate, a top plate, N rows of vertical J-shaped connecting structures, and an inter-plate concrete structure made of concrete poured between the top plate and the bottom plate. The vertical J-shaped connecting structures are all cast in the inter-plate concrete structure. The top plate and the bottom plate are integrally connected with the N rows of vertical J-shaped connecting structures through the inter-plate concrete structure. Each row of vertical J-shaped connecting structures comprises a plurality of vertical J-shaped connecting structures distributed from front to rear; each vertical J-shaped connecting structure comprises an upper connector fixed to the bottom of the top plate and a lower connector hooked to the upper connector; the upper connector and the lower connector are both J-shaped hooks. The SCS bridge deck is simple in structure, reasonable in design, convenient to construct, effective to use and good in mechanical property, and the problems in the existing concrete deck can be solved.

The invention relates to a fireproof rolling shutter door with the good fireproof property and the anti-deformation capacity. The fireproof rolling shutter door comprises a box body, four guiding rails, two curtain boards and a control box, and further comprises a cooling mechanism, two bases and two clearing mechanisms; and each clearing mechanism comprises a moving assembly, a clearing brush anda guiding assembly. According to the fireproof rolling shutter door with the good fireproof property and the anti-deformation capacity, the leakproofness of the fireproof rolling shutter door is improved through the curtain boards and the bases, the capacity of the fireproof rolling shutter door to block fire spreading is further enhanced, and thus the fireproof property of the fireproof rollingshutter door is improved; meanwhile, through the clearing mechanisms, first grooves of the bases can be subjected to dust clearing work, and the situation that the matching degree of the first groovesand the curtain boards is affected by sundries accumulated in the bases and consequently the fireproof property is reduced is avoided; and the curtain boards are cooled through the cooling mechanism,so that the situation that the curtain boards are heated to be bent and deformed, and consequently the service life of the curtain boards is shortened is avoided, and accordingly the service life ofthe fireproof rolling shutter door is prolonged.

The invention discloses a guide wire. The guide wire comprises a far end, a near end and a core wire, the core wire is positioned in a guide wire body and extends from the near end to the far end, a dilating portion is arranged on the core wire, the diameter of the dilating portion is larger than that of the core wire, and a safety net is arranged at a head end, positioned at the far end, of the core wire and is fixedly connected with the head end. The invention further discloses a preparation method of the guide wire. By additionally arranging the safety net at the head end, positioned at the far end, of the core wire, loss of torsion / torque transmission of the guide wire is reduced, and softness and non-deformability of the far end of the guide wire are guaranteed while the phenomenon of 'tail whipping' is eliminated; by arranging the dilating portion on the guide wire, a narrow portion can be pre-dilated by a radial support effect, and an inner cavity of the narrow portion can be dilated to allow a balloon to pass through conveniently. The dilating portion of the pre-dilating guide wire is perfectly round, smooth and soft and cannot cause wounds to blood vessels.

The invention discloses a device and a method for casting and compounding a titanium alloy and a titanium-aluminum alloy, and relates to a device and a method for casting and compounding an alloy. The invention aims to solve the problem that the room temperature performance is poor when the existing TiAl alloy is used as an intermetallic compound. A water-cooling support is installed in a furnace body, a water-cooling copper crucible is installed on the upper end face of the water-cooling support, materials are placed in the water-cooling copper crucible, an automatic control lifting device is installed on the upper portion of the outer side of the furnace body, and a non-consumable tungsten electrode is vertically inserted in the furnace body and extends to the position over the materials. The upper portion of the non-consumable tungsten electrode is installed on the automatic control lifting device and ascends and descends under the control of the automatic control lifting device, a vacuumizing system is installed on the outer side wall of the furnace body and vacuumizes the furnace body, and a material turning spoon is installed at the upper end of the furnace body. The method comprises the following steps: preparing materials; performing preparation; performing placement; performing casting; and detecting the performance of the cast titanium-aluminum alloy. The method is used for casting the titanium alloy and the titanium-aluminum alloy.

The invention discloses a whole sound insulation floor. The floor is sequentially composed of a reinforced concrete structure floor body, a sound-insulating leveling layer, a bonding layer and a surface layer material in a stacked mode from bottom to top. The reinforced concrete structure floor body serves as a base layer. The sound-insulating leveling layer serves as a middle layer. The surface layer material and the bonding layer serve as an upper layer. The bonding layer is located between the sound-insulating leveling layer and the surface layer material. The invention further discloses a construction method for the whole sound insulation floor. Floorboards can be directly laid on the whole sound insulation floor according to a common decoration method, the clear height of a residence will not be reduced, and loads of a floor structure will not be increased.

The invention discloses a flexible shaft apparatus for medical treatment. The flexible shaft apparatus comprises a steel wire rope; the steel wire rope is in a half-folded structure and comprises a double wire head end and a half-folded end, wherein the half-folded end is encircled to form a sleeve ring; and the double wire head end is wrapped with a flexible shaft. By using the flexible shaft to replace a rigid surgical cutter component which is directly made by machining metal, the flexible shaft apparatus has relatively high strength and toughness; and usually, the structural constraint of the flexible shaft apparatus is extremely fine, so that the apparatus can meet the requirements of a minimally-invasive surgery. In addition, the flexible shaft apparatus for the medical treatment is small and exquisite in structure and simple in operations, is time-saving and labor-saving, and can reduce the pain of a patient.

The invention provides a welding stick and a manufacturing method thereof. The welding stick comprises low-carbon steel sheath and a flux core. A surfacing layer is formed after the welding stick is welded. The surfacing layer comprises the following alloying elements in weight percentage: 1.5-5.2 percent of carbon (C), 4-10 percent of chromium (Cr), 0.5-2.5 percent of silicon (Si), 0.5-2.5 percent of manganese (Mn), 0.5-3.5 percent of molybdenum (Mo) and 5-10 percent of titanium (Ti). The welding stick provided by the invention has the characteristics that the surfacing layer formed after the welding stick is welded is high in hardness; carbide particles are fine; and the impact wear resistance is excellent, and the like.

The invention discloses an injection mold for a lithium battery case. The injection mold comprises an auxiliary device and a molding device, wherein the auxiliary device comprises an injection moldingport, an L-shaped pull rod and a fixed die; a molding part comprises an inner core, a moving die, an outer die, an inverted L-shaped pull rod and a push plate; the L-shaped pull rod is fixed on the push plate; the auxiliary device can be mutually nested with the molding device, so that the moving die, the fixed die and the outer die mutually enclose to form an injection molding cavity, and the inner core is filled into the injection molding cavity to form an injection molding die cavity of the lithium battery case; an injection molding port is communicated to the injection molding die cavity;two long sides of the inner core are outward protruded to form two circular arc shapes; the auxiliary device and the molding device can be vertically separated, so that the L-shaped pull rod and theinverted L-shaped pull rod are mutually hooked to drive the push plate to push the molded lithium battery case. The lithium battery case produced by the injection mold disclosed by the invention has the advantages that the deformation resistance is realized, inward concave is not easy to cause, and a lithium battery can be conveniently changed.

The invention relates to a prefabricated energy-saving new residence structure and a manufacturing method thereof. The structure is characterized by comprising prefabricated foundation plates, prefabricated wall plates, an integral roof, prefabricated floors and an external wall insulation integral plate which are prefabricated and formed; the prefabricated foundation plates and the prefabricatedwall plates are connected by reserved bayonet grooves and concrete; the adjacent prefabricated wall plates are connected and fixed through reserved holes, embedded steel plates and bolts; the integralroof comprises light steel keels, calcium silicate plates, a waterproof layer, wood strips, rock wool insulation plates and prefabricated antique cement tiles from inside to outside sequentially; thelight steel keels of the integral roof and the embedded steel plates of the prefabricated wall plates are connected and fixed by bolts. Independent prefabricated structures are adopted, the prefabrication process of the members is conducted in a factory, and then the members are transferred to a construction site for assembly; assembly nodes among the members are reasonably designed, the membershave certain deformation resistance capability, are simple and quick to assemble and operate, and the construction period is greatly shortened.

The invention discloses a pressure-resistant waterproof rubber sealing ring and a preparation method thereof, and belongs to the technical field of sealing rings. According to the pressure-resistant waterproof rubber sealing ring and the preparation method thereof, the comprehensive performance of rubber can be improved by improving raw materials, meanwhile, a pressure-resistant bag is introduced and embedded between working faces, and the pressure in the working direction is sensed through a pair of force contact pieces. The pressure is fed back to a feedback air bag in the middle through a force transmission rod, meanwhile, the change of magnetic fluid in a magnetic control bag is controlled through the deformation of the feedback air bag, and when the sealing ring slightly deforms due to the too large pressure, the feedback air bag forms an extrusion effect on the magnetic fluid diffusing towards the edge. Further, the magnetic field shielding effect of the magnetic fluid on a pair of repulsive magnets is weakened, the magnetic repulsive effect between the pair of repulsive magnets is enhanced, meanwhile, external pressure is resisted to assist the sealing ring in shape restoring, the good sealing performance is restored, compression resistance protection is conducted on the sealing ring, and meanwhile the service life of the sealing ring can be remarkably prolonged.

The invention provides a heating power shield tunnel guide support which is distributed on the inner wall of a tunnel. The heating power shield tunnel guide support comprises two rings of continuous prefabricated reinforced concrete segments. Lining steel plate strips are arranged inside the two rings of segments, outer plate surfaces of the lining steel plate strips and inner plate surfaces of the segments are matched in shape, anchor bars are evenly distributed outside the lining steel plate strips for mutual fixation, and guide support vertical columns for supporting a water supply pipeline and a water return pipeline are arranged inside the steel plate strips of the two adjacent rings of prefabricated concrete segments. According to the heating power shield tunnel guide support, it can be guaranteed that a heating power pipeline can move in the axial direction, and axial or lateral horizontal thrust generated to the inner wall of the tunnel can be effectively supported.

The invention discloses an SCS steel-concrete deck slab with U-shaped connecting structures inside. The SCS steel-concrete deck slab comprises a deck slab bottom plate, a deck slab top plate, N rows of U-shaped connecting structures and an inter-plate concrete structure, and the inter-plate concrete structure is formed by pouring concrete poured between the deck slab top plate and the deck slab bottom plate. The N rows of U-shaped connecting structures are all poured in the inter-plate concrete structure. Each row of U-shaped connecting structures comprises a top plate connecting structure, a bottom plate connecting structure and a connecting cable, each top plate connecting structure comprises a plurality of upper U-shaped connecting pieces distributed at the bottom of the deck slab top plate from front to back along a longitudinal bridge, each bottom plate connecting structure comprises a plurality of lower U-shaped connecting pieces distributed on the upper portion of the deck slab bottom plate from front to back along the longitudinal bridge, and the connecting cables penetrate through the inner sides of the upper U-shaped connecting pieces and the inner sides of the lower U-shaped connecting pieces from front to back. The SCS steel-concrete deck slab is simple in structure, reasonable in design, convenient to construct, good in use effect and good in mechanical property, and multiple problems of an existing concrete deck slab can be solved.

The invention discloses novel high-strength glass. The high-strength glass is formed by compounding two kinds of composite glass, wherein the first kind of glass is prepared from the following raw materials in parts by weight: 40-50 parts of quartz sand, 7-16 parts of boric acid, 5-7 parts of chitosan, 9-11 parts of tungsten oxide, 4-7 parts of sodium silicate, 3-8 parts of ferric oxide, 1-2 partsof polymethylhydrosiloxane and 1-5 parts of a fluxing agent; and the other kind of glass is prepared from the following raw materials in parts by weight: 20-50 parts of polydiphenyl ether resin, 8-20parts of high-density polyethylene, 15-30 parts of glass fibers, 5-15 parts of magnesium oxide fibers, 10-16 parts of a composite modifier, 1-4 parts of polyvinyl butyral and 2-6 parts of an antioxidant. The invention also provides a production process of the novel high-strength glass. The production process comprises the following steps: S1; S2; S3; S4; S5; and S6, pouring the molten glass prepared in S3 into a glass template, standing, cooling and molding. The novel high-strength glass is reasonable in structure, high in impact strength, bending strength, high-temperature resistance and mechanical strength, and has dual deformation resistance.

The invention discloses a compression-resistant anti-deformation high-strength solid wood floor. The compression-resistant anti-deformation high-strength solid wood floor comprises a solid wood floor body (1), and an arch-shaped supporting plate (2) is arranged below the solid wood floor body (1). The two sides of the arch-shaped supporting plate (2) are connected with side plates (3). The side plate (3) located on one side of the arch-shaped supporting plate (2) is provided with a tenon (4), and the side plate (3) located on the other side of the arch-shaped supporting plate (2) is provided with a rabbet (5). A plurality of reinforcing plates (6) are arranged between the arch-shaped supporting plate (2) and the solid wood floor body (1). The arch-shaped supporting plate is arranged for scattering pressure and improving the overall compression-resistant capability and anti-deformation capability. Due to the fact that the reinforcing plates are arranged for connecting the arch-shaped supporting plate and the solid wood floor body, the compression resistance and the anti-deformation performance of the whole solid wood floor are further improved. Moreover, the arch-shaped supporting plate can prevent the bottom of the solid wood floor from being affected with damp and deforming, and the dampproof performance is improved. The solid wood floor not only can improve the strength but also has the advantages of being resistant to compression and capable of preventing deformation and damp.

The invention belongs to the technical field of thin poplar sheet processing, and specifically relates to a method for improving the toughness of a thin fast growing poplar sheet. The method comprisesfollowing steps: processing a thin fast growing poplar sheet by an ethanol solution of sugar alcohol to obtain a preprocessed sheet, processing the preprocessed sheet by a processing agent, refrigerating the sheet, drying the sheet in a drying kiln, and preparing a finished product. Compared with the prior art, the method has the advantages that poplar wood is preprocessed by an ethanol solutionof sugar alcohol at a proper temperature, the structures of cells in the polar sheets are changed; processed poplar sheets will not be cracked in the drying kiln during the drying process; after the poplar sheets are processed by the processing agent, refrigerated, and dried in the drying kiln, the fibers in the wood are redistributed and combined, the fibers become uniform and are resistant to deformation; wood splinters will not be generated during the cutting and planning process, the stability and toughness of obtained poplar sheets are improved, and the application range is enlarged.

The invention discloses a wound surface liquid dressing and a preparation method thereof; the liquid dressing comprises bleached shellac, a plasticizer, gallate octacosyl ester (GA-C28) and a solvent system; the liquid dressing disclosed by the invention is a spraying type GA-C28 / bleached shellac wound surface liquid dressing prepared by taking the GA-C28 as an active component and taking the natural, nontoxic and degradable bleached shellac as a film-forming matrix; and the spraying type GA-C28 / bleached shellac wound surface liquid dressing can quickly form a film on the surface of skin, has good film permeability and liquid absorbability, has certain deformation resistance, has good anti-inflammatory and healing effects on wounds, is high in wound surface healing speed and healing rate, meets relevant requirements of national standards, satisfies the requirements on the wound surface liquid dressing in daily life and medical treatment, and has better the application prospect. The preparation method of the liquid dressing disclosed by the invention is simple to operate, mild in process condition and suitable for industrial large-scale production.

The invention provides a construction method of a corrugated steel arch bridge. The construction method comprises the following steps: acquiring construction environment data; performing modeling according to the obtained data; building a corrugated steel support structure according to the modeling data; building an arch bridge on the built corrugated steel supporting mechanism; according to the construction method of the corrugated steel arch bridge, data are reasonably used for building the arch bridge, the building effect of the arch bridge can be guaranteed, and the building progress of the arch bridge is improved.

The invention belongs to the technical field of thin poplar sheet processing, and specifically relates to a method for improving the toughness of a thin fast growing poplar sheet. The method comprisesfollowing steps: processing a thin fast growing poplar sheet by an ethanol solution of sugar alcohol to obtain a preprocessed sheet, processing the preprocessed sheet by a processing agent, refrigerating the sheet, drying the sheet in a drying kiln, and preparing a finished product. Compared with the prior art, the method has the advantages that poplar wood is preprocessed by an ethanol solutionof sugar alcohol at a proper temperature, the structures of cells in the polar sheets are changed; processed poplar sheets will not be cracked in the drying kiln during the drying process; after the poplar sheets are processed by the processing agent, refrigerated, and dried in the drying kiln, the fibers in the wood are redistributed and combined, the fibers become uniform and are resistant to deformation; wood splinters will not be generated during the cutting and planning process, the stability and toughness of obtained poplar sheets are improved, and the application range is enlarged.

The invention discloses a waterproof single-layer lining structure suitable for a four-level surrounding rock double-track track. The bolt on the Ⅳ-level surrounding rock, the bolt is perpendicular to the rock surface of the Ⅳ-level surrounding rock; wherein, the rock surface of the Ⅳ-level surrounding rock is also washed, sprayed with the first layer of coarse fiber concrete and Curing, spray mortar and curing, spray waterproofing and curing, spray the second layer of fine fiber concrete and curing. The invention relates to a waterproof single-layer lining structure suitable for grade IV surrounding rock double-track tunnels. The single-layer lining structure formed by this technology is uniformly stressed, has a certain ability to resist deformation, and has simple construction technology and construction period. Short, reduce construction pollution, low-carbon and environmental protection, widely used in the lining structure of grade IV surrounding rock double-track tunnel engineering.

The invention discloses a wound surface liquid dressing liquid and a preparation method thereof. The liquid dressing comprises bleached shellac, plasticizer, stearyl gallate (GA-C 28 ) and solvent system, the liquid dressing of the present invention is GA-C 28 As the active ingredient, the spray-type GA-C is prepared with natural, non-toxic and degradable bleached shellac as the film-forming substrate. 28 / Bleached shellac wound liquid dressing, which quickly forms a film on the skin surface, and the film has good air permeability and liquid absorption, and has a certain anti-deformation ability. The healing rate is high, meets the relevant requirements of the national standard, meets the needs of daily life and medical treatment for wound liquid dressings, and has good application prospects. The preparation method of the liquid dressing of the present invention has simple operation and mild process conditions, and is suitable for industrialized large-scale production.

The invention discloses an air-permeable flexible skin electrochemical sensor, a preparation method of the air-permeable flexible skin electrochemical sensor, and application. The air-permeable flexible skin electrochemical sensor is mainly composed of a porous flexible substrate layer and an electrochemical sensor from bottom to top; a porous polyimide film has a certain anti-crimp function, canbe conformal with skin, has good skin fit, and simultaneously, has good air permeability; sweat evaporation is facilitated; skin irritation is prevented; accumulation of detection substances is avoided; the detection accuracy is increased; high temperature and high pressure are not required in the preparation method of the porous polyimide film; the requirement of film making equipment is simple;the method has the advantages of being high in efficiency, low in cost, one-step, free from a template and the like; and the sensor in the invention has the advantages of being air-permeable, flexible, good in skin fit and the like, cannot irritate skin while being worn for a long time, and can be used for wearable flexible skin electronic equipment.

The invention discloses a compliant skin energy supply device which is mainly formed from, from bottom to top, a flexible substrate layer, a substrate electrode layer, and an energy patch composed ofa perfluorosulfonic acid polymer thin film layer. A laccase molecule layer and a platinum nano-particle layer are formed, in a cured manner, between the substrate electrode layer and the perfluorosulfonic acid polymer thin film layer, thus forming a positive electrode of a primary battery after curing; a glucose oxidase molecule layer, a glucose molecule layer and a platinum nano-particle layer are formed, in a cured manner, between the substrate electrode layer and the perfluorosulfonic acid polymer thin film layer, thus forming a negative electrode of a primary battery after curing. The compliant skin energy supply device is flexible and replaceable, has high energy transmission efficiency and is green and environment-friendly, wherein energy is sourced from a redox reduction of the glucose at the negative electrode and oxygen at the positive electrode.

The invention relates to a fireproof rolling shutter door with the good fireproof property and the anti-deformation capacity. The fireproof rolling shutter door comprises a box body, four guiding rails, two curtain boards and a control box, and further comprises a cooling mechanism, two bases and two clearing mechanisms; and each clearing mechanism comprises a moving assembly, a clearing brush anda guiding assembly. According to the fireproof rolling shutter door with the good fireproof property and the anti-deformation capacity, the leakproofness of the fireproof rolling shutter door is improved through the curtain boards and the bases, the capacity of the fireproof rolling shutter door to block fire spreading is further enhanced, and thus the fireproof property of the fireproof rollingshutter door is improved; meanwhile, through the clearing mechanisms, first grooves of the bases can be subjected to dust clearing work, and the situation that the matching degree of the first groovesand the curtain boards is affected by sundries accumulated in the bases and consequently the fireproof property is reduced is avoided; and the curtain boards are cooled through the cooling mechanism,so that the situation that the curtain boards are heated to be bent and deformed, and consequently the service life of the curtain boards is shortened is avoided, and accordingly the service life ofthe fireproof rolling shutter door is prolonged.

The masonry infilled wall comprises a lower prefabricated concrete beam, an upper prefabricated concrete beam, a left prefabricated concrete column and a right prefabricated concrete column, a prefabricated connecting structure is connected between the left prefabricated concrete column and the right prefabricated concrete column, and the prefabricated connecting structure comprises a prefabricated connecting transverse plate; clamping grooves are formed in the upper side and the lower side of the prefabricated connecting transverse plate, a weight reduction cavity is formed in the prefabricated connecting transverse plate, a transverse reinforcing plate is fixedly arranged in the weight reduction cavity, inclined supporting plates are symmetrically arranged on the upper side and the lower side of the transverse reinforcing plate, and the other ends of the inclined supporting plates are fixedly connected with the inner wall of the weight reduction cavity; the device has the beneficial effects that the device is simple in structure and convenient to mount and fix, the whole device is convenient to assemble, the whole weight is reduced while the structural strength is not reduced, and the device has certain deformation resistance.

The invention provides a welding stick and a manufacturing method thereof. The welding stick comprises low-carbon steel sheath and a flux core. A surfacing layer is formed after the welding stick is welded. The surfacing layer comprises the following alloying elements in weight percentage: 1.5-5.2 percent of carbon (C), 4-10 percent of chromium (Cr), 0.5-2.5 percent of silicon (Si), 0.5-2.5 percent of manganese (Mn), 0.5-3.5 percent of molybdenum (Mo) and 5-10 percent of titanium (Ti). The welding stick provided by the invention has the characteristics that the surfacing layer formed after the welding stick is welded is high in hardness; carbide particles are fine; and the impact wear resistance is excellent, and the like.

An environmentally friendly and durable single-layer lining structure suitable for tunnels with weak surrounding rocks. After excavation, concrete mixed with basalt fiber injection is arranged on the inner wall of the tunnel with weak surrounding rocks. A number of anchor rods laid in the rock formation, steel mesh and outer concrete mixed with basalt fibers sprayed on the steel mesh; the above-mentioned single-layer lining structure is: a drainage pipe is set at the outer corrugated depression of the corrugated plate, and the outer surface of the corrugated plate is laid There are non-woven fabrics, and the gaps in the corrugated depressions are filled with filter materials; the above-mentioned annular corrugated plates that match the concrete on the inner wall of the tunnel are connected by multiple corrugated plates, and the overlapping parts between adjacent corrugated plates are fixed by bolts connect. The invention has the advantages of reasonable stress, good deformation resistance, strong pressure bearing capacity, good waterproof effect, simple construction process, low construction cost, low later operation and maintenance cost, resource saving, remarkable economic and environmental benefits, and broad application prospects.