81results about How to "Reinforcing effect" patented technology

The invention discloses a W-shaped rib channel cooling structure suitable for a turbine blade backside cooling cavity and belongs to the field of turbomachinery design. The structure comprises a blade backside cooling cavity, inclined diversion fins, linear diversion fins and flow blocking fins; a plurality of rows of inclined diversion fins on the inner wall of the blade backside cooling cavity are distributed in a W-shaped manner; the linear diversion fins are arranged in a space between the last row of inclined diversion fins and blade tailing edge split seam; and a W-shaped cooling channel is formed by a space defined by the inclined diversion fins, linear diversion fins and the inner wall of the blade backside cooling cavity. According to the W-shaped rib channel cooling structure, the W-shaped rib channel cooling structure is arranged in the blade backside cooling cavity, the rib channel has diversion and acceleration effects on an inner fluid, and simultaneously the blades are reinforced with the arrangement of W-shaped fins. Besides, the structure is simple and reasonable in design, and is suitable for the internal cooling system of turbine blades of a gas turbine.

The invention discloses a high-performance rubber material for cable sheaths, which is prepared from the following raw materials in parts by weight: 40-55 parts of styrene-butadiene rubber, 30-35 parts of ethylene propylene diene monomer rubber, 15-25 parts of natural rubber, 5-6.8 parts of zinc oxide, 2-3 parts of stearic acid, 1.4-1.8 parts of dicumyl peroxide, 10-15 parts of sorbic acid, 5-8 parts of argil, 5-8 parts of coupling agent, 10-18 parts of kaolin, 15-25 parts of modified purple carbon black, 5-13 parts of silica white, 30-45 parts of silicon dioxide, 15-25 parts of spiral nano carbon fiber, 0.8-1.2 parts of accelerator TMTD, 0.4-0.6 part of accelerator ZDC, 5-15 parts of magnesium methacrylate, 3-6 parts of heat-resistant agent LiCO3-50, 3-5.8 parts of microcapsulated red phosphorus, 3-8 parts of anti-aging agent GM and 0.8-1.8 parts of microcrystalline wax. The raw materials are plasticized, mixed and vulcanized to obtain the high-performance rubber material for cable sheaths, wherein the vulcanizing temperature is 145-155 DEG C, the vulcanizing pressure is 15-18 MPa, and the vulcanizing time is 25-35 minutes. The high-performance rubber material for cable sheaths has the advantages of high strength, high wear resistance and high flame retardancy.

The invention discloses an automatic slurry filling device for a concrete crack defect with high adhesion strength, which comprises a slurry filling pipe, wherein the concrete slurry is injected intothe concrete crack through the slurry filling pipe; and also comprises a machine frame, an electric sliding element, an electric lifting element, a rubber sleeve, a trowel, a first supporting rod, a first sucking disc, a second supporting rod and a abutted element; the electric sliding element is in sliding fit with the machine frame, the electric lifting element is arranged on the electric sliding element, the lifting end of the electric lifting element is connected with the slurry filling pipe, and the trowel is sleeved at the periphery of the slurry filling pipe through the rubber sleeve. The first sucking disc is arranged on the end part of the first supporting rod; the connecting end of the abutted element is slidably mounted on the end part of the second supporting rod, and the abutted end of the abutted element can be contacted with the trowel. The device has the advantages that the crack can be fully filled, the slurry leakage condition is reduced, the flatness of the surface after filling the slurry is high, the slurry filling pipe can achieve sliding and grouting in the crack, and the installation stability of a bracket is high, no damage is caused on a wall body or the adhesion strength of a plate body is high.

The invention discloses a cavity wall reinforcement structure and a method for constructing the same. The cavity wall reinforcement structure comprises cavity walls, angle steel, a plurality of steel plate strips, short steel plates, long steel plate strips, split bolts and chemical anchor bolts. The multiple corresponding vertical perpendicular steel plate strips are respectively arranged on wall surfaces on two sides of each cavity wall, and the corresponding transverse horizontal angle steel is arranged at the upper ends of the wall surfaces of the two sides of each cavity wall; the steel plate strips and the angle steel are adhered with the cavity walls by structural adhesive and are anchored by the split bolts; a branch of the angle steel is flush with the upper surface of the corresponding cavity wall, another branch of the angle steel is butted to the corresponding steel plate strips in a flush manner, and the short steel plates are adhered on butt joints of the angle steel and the steel plate strips and are anchored by the split bolts; the bottom surfaces of the cavity walls are adhered with the ground by structural adhesive, and the long steel plate strips for preventing the steel plate strips from outwardly moving are arranged on the outer sides of the tail ends of the lower portions of the steel plate strips, and are anchored with the ground by the chemical anchor bolts. The cavity wall reinforcement structure and the method have the advantages of applicability to sold walls with or without ring beams and applicability to cavity walls.

A method for preparing a rubber reinforcing agent from red mud. The method comprises the following steps: first, preparing red mud, a coupling agent, stearic acid and white carbon black in accordance with the ratio of 194:1:3:2; second, refining the red mud into a red mud powder higher than 5000 mesh; and finally adding stearic acid, white carbon black and the coupling agent into the red mud powder, and mixing evenly. The method not only can realize rubber reinforcing effect but also can realize effects of aging resistance, heat resistant and flame retardance, and has characteristics of energy conservation, environmental protection and reduced cost.

The invention relates to a communication iron tower with a pedestal protection function. The communication iron tower comprises a base, a stand column, foundation bolts, two antennas, a protection mechanism and auxiliary mechanisms, wherein the protection mechanism comprises a sealing assembly and a rust protection assembly; each auxiliary mechanism comprises two adjusting components. According tothe communication iron tower with the pedestal protection function, the protection mechanism can be used for controlling a protective cover to cover the base and the foundation bolts, so that the adverse effects, caused by external environment factors, on the base and the foundation bolts can be reduced, the service life of the base and the foundation bolts can be prolonged, and the stability reduction, caused by the damage to the base and the corrosion of the foundation bolts, of the iron tower is avoided; the auxiliary mechanisms have an effect of reinforcing the antennas under the normal conditions, so that the wind-resistant performance is improved; furthermore, the impurities on the surfaces of the antennas can be scraped, so that the surfaces of the antennas are enabled to be cleanand tidy.

The invention relates to a shield excavation gap synchronous grouting slurry for a water-rich powdery soil layer, the synchronous grouting slurry is a double-liquid slurry formed by mixing and stirring a liquid A and a liquid B. The liquid A comprises the following concrete components in terms of per cubic meter: 100 to 200 kg of cement; 400 to 600 kg of fly ash; 40 to 80 kg of bentonite; 600 to 800 kg of sand; 20 to 70 kg of lime; 400 to 550 kg of water; 6-9 kg of a water reducing agent; and 10 to 20 kg of KFA (potassium fluosilicate); wherein the solution B is a water glass solution, and the volume ratio of water glass to water is (3-4): 1; the liquid A and the liquid B are mixed and stirred according to the volume ratio of 10: 1. The synchronous grouting slurry disclosed by the invention can be widely applied to a powdery soil layer and is not limited to a pure sandy cobble layer and a pure clay layer, and double slurries can be gelled in an extremely short time, so a reinforcing effect of filling and solidifying is rapidly achieved.

The invention provides a high-strength flame-retardant cable special material and a preparation method thereof, and relates to the technical field of cable special materials. The cable special material comprises the following raw materials in parts by weight: 100-120 parts of methyl vinyl silicone rubber, 1-5 parts of boron oxide, 15-20 parts of a reinforcing filler, 20-30 parts of low-melting-point glass powder, 15-20 parts of magnesium hydroxide, 5-10 parts of aluminum hydroxide, 1-5 parts of a modified flame retardant, 5-8 parts of a structure control agent, 3-5 parts of a vulcanizing agent and 15-20 parts of decabromodiphenyl ether. The prepared high-strength flame-retardant cable special material effectively reduces the ceramization temperature of a silicone rubber fireproof composite material, improves the ceramization conversion rate and the ceramization strength, has excellent flame retardancy and high resistivity, can meet the requirements of the industry, and has a good application prospect.

The invention discloses a raw material composition of modified polyurethane material, and a preparation method and application thereof. The raw material composition comprises a component A and a component B, wherein A and B do not exist in the same component; the component A comprises 19-39% of polyoxypropylene polyalcohol, 60-80% of epoxyethane modified silicone polymer and 1% of metal catalyst; and the component B comprises 9.99999-19.99999% of polyether glycol, 80-90% of polyisocyanate and 0.00001% of storage stabilizer. The preparation method comprises the following steps: component A: mixing the polyether glycol, modifier and catalyst, stirring at 15-40 DEG C for 3-4 hours at the rate of 100-120 rpm; and component B: heating the polyether glycol to 80-100 DEG C, stirring, dehydrating and degassing in vacuum until the water content is less than 0.05%, cooling to 10-40 DEG C, adding the polyisocyanate, reacting at 80-85 DEG C for 2-3 hours, cooling to 10-40 DEG C, adding the storage stabilizer, and uniformly stirring. The raw material composition has the advantages of low reaction temperature, incombustibility, high reaction speed, favorable flowability and the like.

The invention relates to the technical field of seal rings, and particularly discloses a modified nano composite silicon rubber seal ring which comprises unvulcanized compounded rubber and a vulcanizing agent in a weight ratio of 100:(0.5-10). The unvulcanized compounded rubber comprises the following components in parts by weight: 70-100 parts of methylvinyl silicone rubber, 1-20 parts of plasticizer, 0.01-10 parts of modified nano additive, 10-50 parts of reinforcing filler and 0.5-5 parts of coupling agent. The modified nano additive is one of modified white graphene, modified graphene and graphene oxide. Small amounts of nano modified particles added into the composite silicon rubber seal ring are beneficial to increasing the sealing property and mechanical strength, but other properties are not influenced. The preparation method effectively improves the problems of water vapor, gas permeability degradation and mechanical property degradation caused by aging of the silicon rubber seal ring in the long-term use process, greatly prolongs the service life of the seal material, and has high application value.

The invention discloses a desk and particularly relates to a computer desk. The computer desk comprises a desktop and foldable supports which are symmetrically arranged on two sides of the desktop, wherein each foldable support is formed by mutually connecting a plurality of bearing pipes; the desktop and the bearing pipes are made of a magnesium alloy material; the desktop and the bearing pipes, and the bearing pipes are connected through all-angle rotary adjustable joints; the desktop comprises a surface net, a winding shaft and an evaporation layer; meshes with the diameters of 0.5mm to 3mm are uniformly formed in the surface net; sliding rails are fixedly arranged on front and rear sides of the surface net; a pull rod is arranged between the sliding rails; a fixed rod is fixedly arranged on the right side of the surface net; two ends of the fixed rod are fixedly connected with the sliding rails; the winding shaft is fixed on the left side of a panel; and a rectangular silica gel cushion capable of being wound on the winding shaft is arranged between the winding shaft and the pull rod. The invention provides the computer desk aiming at the technical problems of an existing computer desk that the heat dissipation effect is poor and the electromagnetic radiation resisting capability is poor.

The invention relates to the technical field of circuit testing and discloses a flexible circuit board and a test tool. The flexible circuit board includes a flexible body having a first crimping portion and an extension portion, wherein the first crimping portion is configured to be press-fitted into the second crimping portion of a substrate to be tested; a first electrical connection structurelocated at the first side of the flexible body, disposed on the first crimping portion and configured to be press-fitted into the a second electrical connection structure on the second crimping portion; and a support structure located on the first side of the flexible body and including a first support portion and a second support portion, wherein the first support portion is disposed on the extension portion and is configured to support the extension portion in a press-fit state to make the extension portion have the same horizontal height as the first crimping portion, and the second support portion is disposed on the first crimping portion and is configured to be supported between the first crimping portion and the second crimping portion in a press-fit state to isolate the first crimping portion from the second crimping portion. The flexible circuit board can be improved in press-fit effect and test success rate in a pseudo-pressure test.

The invention relates to the field of material conveying, and specifically relates to an adjustable conveying height type spiral conveyor. The adjustable conveying height type spiral conveyor comprises a fixing support, wherein fixing supporting seats are fixedly mounted on the outer walls of two sides of the top part of the fixing support; fixing shaft sleeves are fixed to the outer walls of thetop parts of the fixing supporting seats; transverse mounting plates which are horizontally positioned are rotatably inserted into the two fixing shaft sleeves through rotating shafts; a feeding box is fixed to the outer walls of the top parts of the transverse mounting plates; a feeding bucket is fixed to the outer wall of the top part of the feeding box through a bolt; a coiling motor is connected to the lower part of the fixing support through a bolt; and a coiling roller is fixed to an output shaft of the coiling motor. The adjustable conveying height type spiral conveyor has the beneficial effects that the movable triangle principle is utilized to adjust inclination height of a conveying barrel, so that the purpose of adjusting the conveying height is achieved; materials can be conveyed in different conditions, and people can use conveniently; the loss of the coiling motor and the force borne in a static state can be reduced; and the safety of the adjustable conveying height typespiral conveyor in adjusting is ensured.

The invention discloses modified butadiene rubber which is characterized by being prepared from the following raw materials in parts by mole: 0.8 to 2.0 parts of a polar group-containing compound, 40to 80 parts of a solvent A, 1.0 to 2.0 parts of a Lewis alkali, 0.8 to 2.5 parts of epoxy myrcene, 5 to 20 parts of a solvent B, 5.5 to 30 parts of a protective agent, 100 parts of 1,3-butadiene, 3 to15 parts of an activating agent, 0.0005 to 0.004 part of an electron donor and 0.00025 to 0.001 part of a nickel compound. The invention also discloses a composite material adopting the modified butadiene rubber and a preparation method of the composite material. Compared with the prior art, the modified butadiene rubber is modified from the source and has excellent compatibility with a filler.

The invention discloses a conveniently-used fishing net for fish breeding. The conveniently-used fishing net comprises a fishing net main body, a telescopic rod and a catching net; the top of the fishing net main body is fixedly connected with the telescopic rod; the middle part inside the telescopic rod is movably connected with a telescopic inner rod; the top end of the fishing net main body ismovably connected with an adjustable reinforcing rod; the middle part of the adjustable reinforcing rod passes through and is connected with an adjuster; the top inside the adjuster is fixedly connected with a gear; the middle part of the gear is fixedly connected with a bearing; the middle part at one side of the fishing net main body is movably connected with detachable connecting rods; the detachable connecting rods can avoid the phenomenon that slip is caused due to sweat or water on a hand of an operator during working, so that the novelty and safety performance of the conveniently-used fishing net for fish breeding are embodied; and due to the adoption of the adjuster, more fishes can be fished, and the working time of the operator is shortened. The conveniently-used fishing net forfish breeding is suitable for fish breeding and has a wide development prospect in the future.

The invention discloses a production process of a niobium-molybdenum chilled alloy composite roller, which comprises the following steps: smelting a working layer raw material by using a 1.5-ton intermediate frequency furnace to prepare working layer iron liquid, and smelting a core layer raw material by using a 3-ton intermediate frequency furnace to prepare core roller neck iron liquid; fourthly, centrifugal casting is conducted at the temperature of 1350-1370 DEG C, and a working layer is formed after casting is finished; then, core roller neck iron liquid with the temperature of 1375-1385 DEG C is cast in a static core filling mode to form a core layer. Through scientific research and innovation, by adjusting a matrix structure, then adding niobium and molybdenum and through iron mold centrifugal chilling casting, the hardness fall is reduced, and the hardness of a working layer of the roller is improved; the carbon content fully ensures that metal and carbon can form stable network carbide, and the hardness and toughness of the roller are improved.

The invention discloses a cavity wall reinforcement structure and a method for constructing the same. The cavity wall reinforcement structure comprises cavity walls, angle steel, a plurality of steel plate strips, short steel plates, long steel plate strips, split bolts and chemical anchor bolts. The multiple corresponding vertical perpendicular steel plate strips are respectively arranged on wall surfaces on two sides of each cavity wall, and the corresponding transverse horizontal angle steel is arranged at the upper ends of the wall surfaces of the two sides of each cavity wall; the steel plate strips and the angle steel are adhered with the cavity walls by structural adhesive and are anchored by the split bolts; a branch of the angle steel is flush with the upper surface of the corresponding cavity wall, another branch of the angle steel is butted to the corresponding steel plate strips in a flush manner, and the short steel plates are adhered on butt joints of the angle steel and the steel plate strips and are anchored by the split bolts; the bottom surfaces of the cavity walls are adhered with the ground by structural adhesive, and the long steel plate strips for preventing the steel plate strips from outwardly moving are arranged on the outer sides of the tail ends of the lower portions of the steel plate strips, and are anchored with the ground by the chemical anchor bolts. The cavity wall reinforcement structure and the method have the advantages of applicability to sold walls with or without ring beams and applicability to cavity walls.

The invention discloses a road and bridge crack reinforcing structure which comprises a crack repairing structure, the crack repairing structure comprises a roadbed to be repaired, a crack open groove is formed in the top face of the roadbed to be repaired, and a trapezoidal open groove, a slit open groove and a cylindrical open groove are formed in the bottom face of an inner cavity of the crack open groove; through the prestress applying structure, people can apply traction stress to the prestress energy storage mechanism under the assistance of a tool, traction stress can be applied to the fixing mechanism through the prestress energy storage mechanism, downward traction stress can be applied to the reinforcing component through the fixing mechanism, and the effect of fixing the reinforcing component is achieved; meanwhile, the reinforcing component and the fixing mechanism cannot be abraded due to mutual friction in the vibration process, the service life can be prolonged again, the prestress applying structure can be limited through the prestress locking mechanism, in this way, the traction stress borne by the reinforcing component is fixed, and the practicability of the road and bridge crack reinforcing structure is improved.

The invention relates to the technical field of sealing glues, and specifically discloses a modified nanometer composite polysulfide sealing glue for a fireproof glass. The modified nanometer composite polysulfide sealing glue comprises a base glue component and a vulcanization component according to a weight ratio of 100:5-20, wherein the base glue component comprises, by weight, 60-100 parts of a liquid state polysulfide rubber, 0.01-5 parts of modified nanometer powder, 10-50 parts of a reinforcing filler and 0.1-5 parts of a silane coupling agent, the vulcanization component comprises, by weight, 5-20 parts of a tackifier, 5-30 parts of a vulcanizing agent and 0.1-5 parts of a vulcanization accelerator, the number average molecular weight of the liquid state polysulfide rubber is 1000-4000, and the modified nanometer powder is one selected from modified white graphene, modified graphene and oxidized graphene. According to the present invention, the sealing property and the mechanical strength of the modified nanometer composite polysulfide sealing glue are increased while other properties are not affected, the process is simple and easy to operate, and the modified nanometer composite polysulfide sealing glue has high application value.

The invention discloses a low-gloss high-rigidity high-impact polypropylene composite material for automobile hard plastic instrument panels and a preparation method of the composite material. The polypropylene composite material is prepared from the following raw materials in percentage by weight: 33-90 parts of polypropylene, 0-25 parts of ultrafine inorganic filler, 5-20 parts of a flexibilizer, 1-15 parts of fully vulcanized powder rubber, 0.5-3 parts of a compatilizer, 0.1-1 part of an antioxidant, 0.1-1 part of a light stabilizer and 0-2 parts of other auxiliaries. According to the invention, the nano-scale fully vulcanized powder rubber is introduced into a polypropylene composite material system, and the reinforcing effect of the fully vulcanized powdery rubber to toughening agentelastomers is utilized, so that the toughened polypropylene composite material is synergistically reinforced; meanwhile, the nano-scale fully vulcanized powder rubber and the superfine inorganic filler can form a core-shell structure in a polypropylene matrix, so that the obtained composite material has relatively high toughness and also has relatively high strength and rigidity at the same time.Meanwhile, the fully vulcanized powder rubber can reduce gloss of the composite material system, so that a matt effect is achieved.

The invention discloses a landscape ecological retaining wall for a water conservancy project, and relates to the technical field of retaining walls. The landscape ecological retaining wall comprises a retaining wall body, wherein the retaining wall body is composed of a plurality of modules, each module comprises a soil protection plate and a fixing mechanism, the fixing mechanisms are embedded in the middles of the soil protection plates, four clamping grooves and curved clamping blocks are arranged at the four corners of each soil protection plate, inclined faces are formed at the four corners of the inner side of each soil protection plate through chamfers, rotating shafts are arranged on the surfaces of the inclined faces, and connecting mechanisms are arranged on the inner sides of the soil protection plates. The landscape ecological retaining wall has the advantages that adjacent assemblies are spliced, stability and ground grabbing performance are extremely high, mounting is convenient, the landscape ecological retaining wall can effectively adapt to soil slopes with different inclination angles, the water and soil loss rate is reduced, and the safety of a soil dam is greatly improved.

The invention relates to an anti-freezing concrete and a preparation method thereof, and belongs to the technical field of concrete preparation. Wheat bran is used as a raw material; ammonium sulfateprecipitate is extracted by adopting a phosphate buffer salt solution to prepare antifreeze protein, the prepared antifreeze protein and silicone rubber are compounded to prepare composite fibers by adopting electrostatic spinning, and the composite fibers are taken as a filler of the high-strength antifreeze concrete so as to prepare the high-strength antifreeze concrete with light weight, good elasticity, toughness, durability and shock absorption performance. The prepared anti-freezing concrete has an excellent compression resistant and anti-freezing performance, under the condition that the compression resistance of the concrete is not changed, the larger the mass loss rate is, the poorer the anti-freezing performance is, and otherwise, the better the anti-freezing performance is.

The invention relates to a low pile gravity type wharf suitable for a soft soil foundation and a construction method of the low pile gravity type wharf, and belongs to the field of wharfs, which solves the problems that an existing gravity type wharf is influenced by foundation soil properties, large post-construction settlement exists commonly, and the construction period is long. The low pile gravity type wharf includes a plurality of rigid foundation piles, a reinforced concrete structure base plate, a plain concrete wall body and a reinforced concrete copping, wherein the structure foundation of the low pile gravity type wharf adopts the rigid foundation piles, the bottoms of the rigid foundation piles enter a hard soil layer, a broken stone cushion layer and a plain concrete cushion layer are sequentially paved on the upper parts of the rigid foundation piles, the reinforced concrete structure base plate is casted on the tops of the rigid foundation piles, the reinforced concretecopping is arranged on the top surface of the plain concrete wall body, and a riprap refilling structure layer, an inverted filtering layer, a geotechnical cloth and a dang residue layer are sequentially arranged on the rear of the plain concrete wall body from the top to the bottom. According to the low pile gravity wharf and the construction method, properties of the rigid foundation piles are used, settlement and horizontal displacement can be effectively controlled, the reinforcing effect of whole stability on the wharf is also achieved, and the construction period of the wharf is effectively shortened.

A technology for making the nano-calcium carbonate contained latex gloves includes such steps as proportionally dispersing the calcium carbonate nanoparticles and other raw materials in the natural latex, conventional dipping to form gloves, turning over, chlorinating, immersing, rinsing and drying. It has high tear strength and risistance to the penetration of virus.

The invention discloses a method for preparing polyetheretherketone-diatomaceous earth composite materials, and belongs to the technical field of high-polymer materials. The method includes mixing alloy powder with a low melting point, crystal whiskers, starch, glycerin and water with one another, carrying out ball milling on the alloy powder, the crystal whiskers, the starch, the glycerin and thewater and carrying out sieving to obtain mixed slurry; stirring and mixing diatomaceous earth and acid with each other, and carrying out filtering, washing and drying to obtain primarily treated diatomaceous earth; mixing and stirring the primarily treated diatomaceous earth and dopamine solution with each other and carrying out filtering and drying to obtain secondarily treated diatomaceous earth; mixing the secondarily treated diatomaceous earth and the mixed slurry with each other, carrying out ball milling on the secondarily treated diatomaceous earth and the mixed slurry and carrying outreduced-pressure concentration and drying to obtain modified diatomaceous earth; carrying out banburying on polyetheretherketone powder at first, then adding the modified diatomaceous earth, plasticizers and vulcanizing agents into the polyetheretherketone powder, mixing the modified diatomaceous earth, the plasticizers, the vulcanizing agents and the polyetheretherketone powder with one anotherand carrying out extrusion molding to obtain the polyetheretherketone-diatomaceous earth composite materials. The method has the advantage that the polyetheretherketone-diatomaceous earth composite materials prepared by the aid of the method are excellent in mechanical property.

The invention discloses a humid environment earthen site slump damage reinforcement and protection method. According to the method, bamboo fiber rods are adopted as core materials, geotextile serves as a drainage structural layer, and the appropriate draining function and the appropriate reinforcement function are integrated to control underground earthen site slump damage. By means of the method, the well cementing process is omitted, and disturbance of the well cementing process on earthen site soil mass and secondary damage caused by grouting can be avoided; the construction process is simple, flexible drainage bamboo fiber rods can be directly pressed into the earthen site soil mass through artificial static force, the strength of the earthen site soil mass and the tension resistance of natural bamboo wood are combined, and the stability of the earthen site soil mass is integrally and moderately improved; the defects of large disturbance, serious pollution, irreversibility, poor deformation compatibility suitability through a traditional anchoring technology can be effectively overcome.

The invention provides a PVC sheet pile used for retaining and protecting for foundation excavation and a preparation method of the sheet pile, and belongs to the technical field of civil engineering.The PVC sheet pile is prepared from the following raw materials in parts by mass: 100 parts of PVC, 20-40 parts of calcium carbonate, 1-2 parts of a lubricant, 4-10 parts of a flexibilizer, 4-8 partsof a Ca-Zn composite stabilizer, and 0-2 parts of a light stabilizer. The method provided by the invention improves the stiffness of the sheet pile, improves the ultraviolet aging resistance, and haslow costs.

The invention relates to the technical field of ancient building reinforcement, and discloses a wall reinforcing structure for enhancing the integrity of an ancient building. The wall reinforcing structure comprises an outer wall, vertical walls are fixedly installed between the top wall and the bottom wall of an inner cavity of the outer wall, limiting plates are arranged on the left side and theright side of the outer wall, limiting columns are fixedly installed on the sides, opposite to the limiting plates, of the left and right sides, and cushion blocks are fixedly mounted at the four corners of the inner wall of the outer wall. According to the reinforcing structure and method for enhancing the integrity of the ancient building, by arranging the cushion blocks, the corners of the inner wall of the ancient building can be protected and reinforced; by arranging a mounting rod and fixing plates, the vertical walls can be supported and fixed through mounting pieces, so that the vertical walls are prevented from collapsing; the mounting rod can be used for making the vertical walls connected, so that mutual support and mutual assistance can be facilitated, the situation that one vertical wall shakes or collapses is avoided, a good reinforcing effect can be achieved on the vertical walls, and the ancient building is longer in life time.

The invention discloses a building ground surface settlement repair method. The method is characterized by comprising the following steps that S1, a road breaker is used for breaking the portion, where settlement occurs, of the building ground surface, original filler of the settlement portion is removed, then the concrete surface on the inner side wall of a foundation pit formed when the settlement portion is broken is cleaned, grinding is performed when necessary, and repair should be performed in advance if honeycombs or holes exist; and S2, after the inner side of the foundation pit is cleaned, surveying and setting out are performed. Through pile foundations, spurs, connecting shafts, a division wall, automatic repair bags, a metal binding wire net and clamp nuts which are designed, the problems that an existing building ground surface settlement repair method is mostly a layer-to-layer overlay filling method, a flaking phenomenon is prone to occurring between layers, the stability after the building ground surface repair is severely affected, in addition, the water proof performance is poor, automatic repair fails when an internal waterproof structure is damaged, and the service life of the building ground surface which is repaired is severely shortened are solved.

The invention relates to the technical field of construction engineering, in particular to a tensile bonded rebar structure for connecting an original concrete column with an additionally arranged beam. The tensile bonded rebar structure is applied through a splay connection steel plate, a rebar bolted or welded to a web of the connection steel plate and a carbon fiber sheet wrapped on the periphery of the original concrete column and connected with the splay connection steel plate, thus, the quantity and the area of rebars needing to be planted on the original concrete column can be greatly decreased, the number of holes drilled in the original concrete column is decreased, damage to the original concrete column is reduced, a reinforcement effect on the original concrete column is achieved, and the bearing capacity of the original concrete column is greatly improved; and in addition, a part of tension of the additionally arranged beam to the bonded rebar interface is converted into lateral pressure to the original concrete column through the carbon fiber sheet, not only is the tension of the additionally arranged beam to the bonded rebar interface decreased, but also a three-directional pressure state of the original concrete column is formed, the reinforcement effect on the original concrete column is achieved, and the bearing capacity of the original concrete column is improved.