66results about How to "Guaranteed reinforcement" patented technology

The invention discloses a cold-rolled steel sheet with yield strength of 980 MPa grade, and belongs to the technical field of cold-rolled high strength steel. The steel sheet comprises the following chemical components in percentage by weight: 0.08-0.13% of C, 0.05-0.5% of Si, 1.2-2.0% of Mn, less than or equal to 0.010% of P, less than or equal to 0.005% of S, 0.6-1.5% of Cr, 0.08-0.20% of Ti, 0.02-0.08% of Nb, 0.04-0.2% of V, one or more of Nb, V and Ti, 0.02-0.1% of Alt, less than or equal to 0.006% of N, less than or equal to 0.004% of O, and the balance of Fe and unavoidable impurities. The tensile strength of the steel sheet is more than 980 MPa, therefore, the steel sheet is excellent in plasticity and forming performance. The manufacturing method of the steel sheet is a low-cost cold-rolled annealed steel sheet manufacturing method, and can be implemented on common reversing cold rolling mills and cover annealing devices.

The invention discloses a method using surface orientation bedding drilling grouting to reinforce laminar limestone. The method includes: performing surface drilling until a suspected water outlet point is reached, performing drilling grouting, wherein drilled holes include a main hole and branch holes, the main hole is provided with a straight hole section and an oriented bedding section, an oriented slanting-guide section is further arranged between the straight hole section and the oriented bedding section, and the branch holes include primary branch holes and secondary branch holes; a water-bearing stratum is modified through the drilling grouting, grouting pressure is 1.5-3.5 times of the hydrostatic pressure of a to-be-grouted point, grouting termination pressure is 3.5-4 times of the hydrostatic pressure, and the lime-cement-flyash water-bearing stratum is transformed into a water-resisting layer to resist lime, cement and flyash and water of the water-bearing stratum below the lime, cement and flyash. By the method, hidden water guide channels are blocked, a base Ordovician limestone karst powerful water source is blocked, and safety of deep exploitation is guaranteed.

The invention relates to a medium strength aluminium alloy wire with conductivity of 55% IACS, and a preparation method thereof, and belongs to the field of alloy manufacturing technology. The alloy elements comprise, by weight, 0.16%-0.22% of iron, 0.48%-0.54% of silicon, 0.62%-0.67% of magnesium, 0.01%-0.02% of boron and 0.02%-0.05% of ytterbium, with the balance being aluminium. The medium strength aluminium alloy wire with a product conductivity higher than or equal to 55% IACS and tensile strength higher than or equal to 315 MPa is obtained by processes of selecting materials, smelting liquid aluminium, adjusting liquid aluminium ingredients, carrying out purifying treatment, deslagging, standing with heat preservation, degassing, filtering with heat preservation, casting and crystallizing, rolling an aluminum rod, drawing and aging. The wire and cable produced by using the aluminium alloy can be erected continuously by a conventional construction process. In a circuit operation process, circuit loss can be reduced; construction fee can be reduced; and enormous economic benefits and social benefits can be brought about for power transmission and transformation industries.

The invention provides a crossed reinforcing device for a power transmission tower. The crossed reinforcing device comprises reinforcing pieces and a plurality of pairs of external clamping pieces. The reinforcing pieces correspond to angle steel main materials of the power transmission tower, and the reinforcing pieces and the angle steel main materials are arranged oppositely on the outer cornersides of the angle steel main materials to form crossed structures for reinforcing of the power transmission tower. Each pair of external clamping pieces is arranged in two connecting spaces betweenthe outer corner side of the corresponding reinforcing piece and the outer corner side of the corresponding angle steel main material for fixing the reinforcing piece to the angle steel main material.According to the crossed reinforcing device, reinforcing of the reinforcing pieces to the angle steel main materials is ensured, and the influence of original inclined materials / transverse partitionmaterials is skillfully avoided, thus the reinforcing pieces and the angle steel main materials are closely attached, the using performance of the power transmission tower is not affected, construction operation is convenient, the power transmission tower does not need to be punched, welded or detached, damage of punching and welding to the performance of the power transmission tower, especially the strength of the angle steel main materials, is avoided, the accidents such as collapse of the angle steel main materials are prevented, and meanwhile, the difficulty of altitude operation of operators on the power transmission tower is reduced.

The invention discloses a method for processing a meat product rich in omega-3 unsaturated fatty acids, which comprises the following steps: chopping and mixing skins of domestic animals and fowl, isolated soybean protein, fat meat cubes, deep sea fish oils, and vitamin E to emulsified meat paste, and chopping and mixing the emulsified meat paste with prickled lean meat, fat meat cubes and spice powder to obtain fine paste with better emulsification effect. Accordingly, omega-3 unsaturated fatty acids are sufficiently emulsified and fused with the meat products to prevent loss of omega-3 unsaturated fatty acids in the processing. The meat product prepared from the meat paste with better emulsification effect can remove astringent taste and fishy taste of omega-3 unsaturated fatty acids in the food, effectively protect the fish oil from being oxidized quickly in the meat product, and remarkably enhance the effects of omega-3 unsaturated fatty acids.

The invention discloses a 6-series aluminum alloy and a processing method thereof. The 6-series aluminum alloy includes: magnesium (Mg): 0.6-1.0 wt%; silicon (Mg): 0.4-0.8 wt%; manganese (Mn): ≤0.04 wt%; Titanium (Ti): ≤0.04 wt%; Iron (Fe): ≤0.10 wt%; Copper (Cu): ≤0.05 wt%; Chromium (Cr): ≤0.01 wt%; ) and unavoidable impurities. The invention optimizes the components of the 6 series aluminum alloy and controls the processing technology, so that the size and distribution of the intermetallic compounds are better controlled, and finally the material has a better anodic oxidation effect.

The invention discloses a high conductivity rare earth hard aluminum conductor which comprises, by weight, 0.0887% to 0.145% of iron, iron with a weight ratio of 1.7 to 2.5 with the silicon, 0.01 % to 0.12 % of boron, 0.01% to 0.15% of gadolinium and aluminum. The invention further discloses a preparation method of the high conductivity rare earth hard aluminum conductor. The preparation method mainly comprises matching aluminum ingots, melting and carrying out boronizing, refining and other processes, the intensity of an obtained hard aluminum conductor is 160Mpa, electric conductivity is 63% IACS, and tensile strength is 160Mpa. Cables produced by utilizing the conductor can continue to be erected by using a traditional construction process, in a line operating process, line loss is reduced, and construction cost is saved.

The invention relates to a municipal pipeline construction technology and discloses a construction technology of municipal pipeline maintenance. The construction technology of municipal pipeline maintenance solves the problem that in an existing pipeline traction process, a pipeline is prone to being blocked by an obstacle in a guide hole, and the traction of the pipeline is inconvenient. The construction technology of municipal pipeline maintenance includes the following steps that S1, on-site investigation is carried out; S2, a working pit is dug; S4, a guide hole is drilled; S5, the hole isbackward enlarged; S6, a pipeline is backward dragged; S7, pipeline connection is carried out; S8, the pipeline is grouted outside; and S9, drainage wells at both ends are unblocked. The constructiontechnology has the function of driving a traction head to rotate automatically, an axial impact force on an obstacle in the guide hole is changed into a radial acting force, so that the obstacle in adrill hole can be flattened conveniently, and the obstacle can be prevented from blocking the pipeline in the traction process. At the same time, the damage to a traction device is reduced, and thusthe working efficiency is improved.

The invention provides a power transmission tower reinforcing device. The power transmission tower reinforcing device comprises a reinforcing part and a clamping part, wherein the reinforcing part corresponds to a main material of a power transmission tower, is arranged at the outer angle side of the main material, and is used for reinforcing the power transmission tower, and the clamping part encloses a clamping space for clamping the reinforcing part and the main material. By means of the power transmission tower reinforcing device, through the clamping part, the reinforcing part and the main material are clamped, so that the reinforcing part is fixed to the main material, reinforcing of the main material by the reinforcing part is guaranteed, the using performance of the power transmission tower is not influenced, the power transmission tower can be reinforced under the condition of electrified running, the construction operation is convenient, the power transmission tower does notneed to be punched, welded or detached, the damage of punching and welding to the performance of the power transmission tower, particularly the strength of the main material is avoided, accidents likecollapse of the main material are prevented, and meanwhile, the difficulty for operating personnel to work high above the ground on the power transmission tower is lowered.

The invention relates to a soft ground quick solidifying method, which comprises following steps: 1, vacuum pre-compress discharging water and solidifying the soft ground for 30 days to reach more than 70% of solidify degree;, b, removing the vacuum pre-compress sealing film, to process power solidifying treatment as compressing, etc. the invention combines the vacuum pre-compress water discharge solidifying method and the power solidify method, to improve the efficiency, reduce the cost and time as 1 / 3-3 / 2 reduced time of before. It can be used in non-sand ventilating layer of soft ground and the sand-interlayer ventilating layer.

The invention provides a method for repairing mechanical damage of a radial tire, relates to the technical field of tire repair, and aims to solve the problems that a patch is easy to flake off, which causes second damage to the broken part, multiple repair steps and long repair time in the conventional repair technology. The method comprises the following steps: 1) shaping treatment is performed on the broken part so as to from a rectangular digging opening; 2) polishing treatment is performed on the broken part so as to enable the new rubber of a tire to be exposed completely, meanwhile, the line layer structure of the tire is not exposed; 3) stitching treatment is performed on the broken part, stitching is started from one corner of the digging opening, and threads are arranged in a cross manner up and down within a polishing range, and vertically arranged in the direction from the inner side of the tire to the outer side of the tire; 4) rubber hot vulcanization treatment is performed, a vulcanizing agent and raw rubber repaired newly are adopted for performing extrusion heat vulcanization treatment in a vulcanizing machine. According to the invention, the reinforcement of the interior of the broken part and rubber hot vulcanization treatment are combined, and reinforcement and vulcanization treatment are completed at one step, so that a patch inside the repaired tire is solid and firm, and is less susceptible to flaking, the repair process is simplified greatly, the repair efficiency is high, and the using effect is excellent.

A telescopic rod for a photovoltaic solar support particularly relates to the field of photovoltaic solar energy technology, includes a telescopic rod base, A telescopic rod body is also arrange in that base of the telescopic rod, A telescopic rod body include a first rod body and a second rod body, one end of the first rod body is movably arranged in the base of the telescopic rod, the other endof the first rod body is movably connected with one end of the second rod body, a damping rod is fixedly arranged on the other end of the second rod body, A mount is arranged on the damping rod, A lateral wall of that other end of the first rod body is also provide with a first fixing hole, The first fixing hole is fixedly provided with a hole sleeve, and the interior of the hole sleeve is movablyprovided with a fixed pin shaft. The fixed pin shaft comprises a pin shaft end part and a pin shaft tail part, a large diameter end of the pin shaft end part is fixedly connected with one end of thepin shaft tail part, a ring body sleeve is movably arranged on the other end of the pin shaft tail part, and a plurality of second fixed holes are also arranged on the side walls of the second rod body. The invention has the advantages that the height can be adjusted according to the actual use needs, and the fixation is firm, and the like.

The invention discloses a randomly-distributed short tungsten fiber reinforced CuW composite. The randomly-distributed short tungsten fiber reinforced CuW composite is prepared from following raw materials in percent by mass including: 9.5%-30% of Cu powder, 60%-90% of W powder and 0.5%-15% of short tungsten fibers, wherein the sum of the mass percents of the components is 100%. The mechanical performance such as stretching, compression and frictional wear of the composite is remarkably improved. The invention further provides a preparation method of the composite. The preparation method specifically includes the steps that 1, 9.5%-30% of Cu powder, 60%-90% of W powder and 0.5%-15% of short tungsten fibers are weighed according to the mass percents, wherein the sum of the mass percents ofthe components is 100%; 2, the components are mixed; 3, a composite blank is prepared; 4, the composite blank is subjected to hot-pressed sintering; and 5, the composite blank obtained after hot-pressed sintering in S4 is subjected to copper infiltration. By means of the method, the comprehensive mechanical performance of the composite can be remarkably improved.

The invention discloses a specially-shaped plate crossbeam bridge steel spring supporting and jacking active reinforcing construction method. The method includes the steps that S101, an n-shaped steelbent cap is additionally arranged on the two sides of a first pier column; S102, the two ends on the n-shaped steel bent cap are each provided with a force measurement adjustable basin type rubber support; and S103, a synchronous hydraulic jacking system is adopted for supporting and jacking a crossbeam and the n-shaped steel bent cap, and the n-shaped steel bent cap elastically deforms; and theforce measurement adjustable basin type rubber supports are adjusted, so that the upper portions and the lower portions of the force measurement adjustable basin type rubber supports are tightly attached to the middle crossbeam and the n-shaped steel bent cap, the force measurement adjustable basin type rubber supports are locked, and supporting and jacking force can be transmitted to the middle crossbeam through the force measurement adjustable basin type rubber supports. A single-point supporting structure of an original bridge is converted into a three-point supporting structure through steel spring supporting and jacking, the shear force and the pressure borne by the pier column are jointly borne through three positions, the problem that the middle crossbeam is insufficient in shear capacity is solved, the service life of a bridge is prolonged, and the safety of the bridge is guaranteed.

The present invention relates to an osteosynthesis device which is used, in particular, for securing joint fragments and for the temporary splinting of toes, more particularly for treating hammer toes or other malalignments of toes. The device comprises a pin (1) with the centre axis (2) and the length L, the pin consisting largely of a bioresorbable material. The pin (1) has at least in one section of the length L a non-circular cross-section (3) that is orthogonal to the centre axis (2) and has a radius of curvature.

The invention discloses a lap joint structure and process of a polymer self-adhesive film waterproof coiled material and an asphalt waterproof coiled material, and relates to the field of waterproof coiled materials. The lap joint structure and process for the polymer self-adhesive film waterproof coiled material and the asphalt waterproof coiled material involve a wall body, a polymer waterproofcoiled material body, an asphalt waterproof coiled material body and a lap joint coiled material; the polymer waterproof coiled material body and the asphalt waterproof coiled material body are flatlylaid on the wall body; the lap joint coiled material is welded to the edge of the polymer waterproof coiled material body and the edge of the asphalt waterproof coiled material body; and a temporaryfixing mechanism and a welding pressing mechanism which correspond to the polymer waterproof coiled material body and the asphalt waterproof coiled material body are arranged on the wall body. According to the lap joint structure and process of the polymer self-adhesive film waterproof coiled material and the asphalt waterproof coiled material, the attaching performance between the lap joint coiled material and the polymer waterproof coiled material body and between the lap joint coiled material and the asphalt waterproof coiled material body is guaranteed, so that the welding effect is good,the lap joint sealing performance is guaranteed, and the waterproof performance is improved.

The invention discloses an integrated adjustable scaffold for high side slope construction. The integrated adjustable scaffold comprises pre-buried parts, door-type frames, cross rods, X-shaped rods and operation tables, the door-type frames comprise vertical rods and fixed cross rods, vertical rod sliding ways are arranged on the upper portions of the vertical rods, the cross rods are matched with the vertical rod sliding ways in a matched manner through bolts, cross rod sliding ways are arranged on the cross rods, at least one of two ends of each cross rod is matched with the corresponding cross rod sliding way in a matched manner, each operation table is placed on the cross rods of two sides, each X-shaped rod comprises two inclined rods with same length, the two inclined rods are hinged at midpoints each other, the inclined rods are connected with the vertical rod sliding ways in a matched manner through bolts, sleeves with bottom sliding ways are arranged on the pre-buried parts,and the lower portions of the vertical rods are inserted into the sleeves in a matched manner and connected with the bottom sliding ways in a matched manner through bolts. The stable operation tablesare formed by the scaffold form, installation efficiency is improved, and installation requirements of any high side slopes are met.

The invention relates to the technical field of metallurgy, and particularly discloses a hot-based spangle-free galvanized steel coil and a production method thereof. A base plate of the hot-based spangle-free galvanized steel coil comprises the chemical components of, in percentage by mass, 0.15%-0.18% of C, less than or equal to 0.1% of Si, 0.67%-0.7% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.022%-0.04% of Als, 0.009%-0.012% of Nb, 0.003%-0.007% of V, 0.048%-0.06% of Ti, and the balance Fe and inevitable impurities, wherein the weight of a zinc coating ranges from 600 g / m<2> to 620 g / m<2>. The hot-based spangle-free galvanized steel coil has high strength and corrosion resistance, the yield strength reaches 550-600MPa, the tensile strength reaches 635-700MPa, and the ductility is greater than or equal to 18%.

The invention provides a thin-wall annular part laser shot peening strengthening device and a processing method. The thin-wall annular part laser shot peening strengthening device comprises a laser generating device, a light path transmission system, an automatic feeding and discharging mechanical arm, a station rotating disc, workpiece clamp systems and automatic adhesive tape pasting devices, wherein, the station rotating disc comprises at least two processing stations and a feeding and discharging station; the automatic feeding and discharging mechanical arm is used for grabbing the thin-wall annular parts at the feeding and discharging station; laser beams are emitted to the outer rings of the thin-wall annular parts at the processing station through the light path transmission system and are used for strengthening the thin-wall annular parts; each station of the station rotating disc is provided with the workpiece clamp system and the automatic adhesive tape pasting device; the workpiece clamp system is used for enabling the thin-wall annular parts to rotate after clamping the thin-wall annular parts; and the automatic adhesive tape pasting devices are used for forming restraint layer on the outer rings of the thin-wall annular parts. According to the thin-wall annular part laser shot peening strengthening device and the processing method, uniformly-distributed residual compressive stress is formed on the surface layer of the thin-wall annular parts, and the fatigue life of the thin-wall annular parts is prolonged.

The invention belongs to the related technical field of metal surface treatment, and particularly discloses a method for strengthening a ferroalloy surface through laser melt injection. The method specifically includes the steps that lasers are used for conducting melt injection on the to-be-reinforced ferroalloy surface, and meanwhile, a paraxial powder feeding mode is adopted for injecting cBN ceramic particles into molten pool trailing, so that the cBN ceramic particles enter a molten pool through the molten pool trailing to form a cBNp / Fe melt injection layer after cooling, and the ferroalloy surface is strengthened through laser melt injection. According to the method, the paraxial powder feeding mode is adopted for injecting the cBN ceramic particles into the molten pool trailing toprevent the cBN ceramic particles from being directly oxidized and decomposed or directly sublimated under the action of the lasers, and meanwhile, the power density of the lasers, the paraxial inclination angle and the injection range of cBN ceramic are optimized to guarantee that the cBN ceramic is successfully and effectively injected into the ferroalloy surface to form the cBNp / Fe melt injection layer, so that the ferroalloy surface is strengthened.

The invention discloses a single-event-resistant reinforced clock and data recovery circuit, which comprises a sampling apparatus, a phase discriminator, a digital filter, a logic judgment circuit, an encoder, a majority decision device, a phase interpolator and a multiphase clock generation circuit. The circuit adopts the logic judgment circuit, transfer of a phase discrimination error of the phase discriminator and a filtering error of the filter, which are caused by a single event effect, into subsequent encoder circuits can be effectively restrained under the condition that the clock and data recovery circuit is locked, so that the correctness of the signal transferred to the encoder is guaranteed; a coding error caused by the single event effect is restrained through a redundant structure of the encoder, so that accidental adjustment of the locked clock and data recovery circuit is effectively avoided, the influence of the single event effect on the phase lock state is greatly reduced, and the reliability of the circuit is improved.

The invention relates to a lifting hook rotating disc type device of a shot blasting machine. The lifting hook rotating disc type device of the shot blasting machine comprises a cleaning chamber, an electric control system, a dust collector, a separator, a lifting machine, a shot supplying system, a switch type shot blasting door and a spiral conveying system, wherein a lifting hook rotating disc mechanism and two shot blasting devices are arranged in the cleaning chamber, the spiral conveying system is arranged at the lower part of the cleaning chamber, the lifting machine is arranged on the side surface of the cleaning chamber, the separator is arranged on the side surface of the lifting machine, the separator is communicated with the dust collector by a closed pipeline, the shot supplying system is arranged at one side of the lifting hook rotating disc mechanism, the switch type shot blasting door is arranged under the shot supplying system, the shot blasting devices are fixed on the switch type shot blasting door, and a noise reduction safety protection device is arranged at the other side of the lifting hook rotating disc mechanism.

The invention provides a wear-free thick laminated plate friction stir brazing method adopting a wide-shoulder tool with a thick needle. According to the method, the tool with the needle is adopted for enhancing the heat-force action effect of the bottom of a laminated plate and the surface of a base plate; the wear of the high-strength base plate on a needle end is removed by enabling the needle end to approach a welding interface but not penetrate through the welding interface, the thick laminated plate and the base plate can be welded at one time mainly by the deformation heat and friction heat generated at the bottom of the thick needle, the friction heat generated on the shoulder, the extrusion and torsion effects on the welding interface and the metallurgical effect of brazing materials under the circumstance that the wear of the needle end is removed, the welding size can reach the diameter of the needle end, and the efficiency is improved.

The invention discloses a high-pressure water jet device based on welding residual stress regulation and control and a using method thereof. The water jet device comprises a machine body, a nozzle system, a high-pressure generation system, a pressure transmitter and a computer. The machine body comprises a base, a stand column and a workbench, the stand column is vertically fixed to one side of the base, and the workbench is arranged above the base. The nozzle system is arranged on one side of the stand column through a nozzle fixing table and located above the workbench, the nozzle system is connected with the high-pressure generation system through a pipeline, and the pressure transmitter is connected with the computer. A surface pressure detection assembly is arranged above the workbench, and a nozzle inlet pressure detection assembly is arranged at the water inlet end of the nozzle system. According to the device, the pressure detection assembly is arranged to detect and collect the actual water jet impact pressure borne by a welding component, the water jet axis dynamic pressure at the inlet position of a nozzle and the water jet pressure of the high-pressure generation system, and the water jet pressure can be adjusted in time according to detection data.

The invention discloses a laser shock peening device of an airplane blade tenon. The laser shock peening device comprises a workpiece clamp, a tool, a first mechanical arm and a laser device. The workpiece clamp is used for clamping of a to-be-strengthened airplane blade. The tool is transparent, a cooperation portion of the tool is matched with the airplane blade tenon, and after absorption paintis sprayed to the to-be-strengthened airplane blade tenon, the tool is mounted on the airplane blade tenon. The first mechanical arm is used for driving the workpiece clamp. A laser head of the laserdevice is used for laser shock peening of the airplane blade tenon. Based on the laser shock peening device, the strengthening effect can be guaranteed easily.

The invention relates to an assembly type building external wall PC component top cast-in-place portion side mold detachable reinforcing component. The assembly type building external wall PC component top cast-in-place portion side mold detachable reinforcing component comprises a superimposition plate, an external wall PC component and a connection steel bar, wherein the external wall PC component is located on one side of the superimposition plate and is connected with the superimposition plate, the connection steel bar is located inside the external wall PC component, the assembly type building external wall PC component top cast-in-place portion side mold detachable reinforcing component further comprises a side mold and a side mold reinforcing device, the side mold is arranged on theexternal wall PC component through the side mold reinforcing device, the side mold reinforcing device comprises a connection sleeve, reinforcing back ribs, a connection plate, a pad block, a reinforcing nut and a screw rod, the connection sleeve is fixedly arranged on the external wall PC component and is provided with a threaded hole corresponding to the screw rod, the number of the reinforcingback ribs is two, the two reinforcing back ribs are connected through the connection plate, and the separation distance between the two reinforcing back ribs is a gap capable of allowing the screw rodto penetrate through. According to the assembly type building external wall PC component top cast-in-place portion side mold detachable reinforcing component, by means of the manner that the outer side of the side mold is designed and configurated with a reinforcing device component, an opposite-pulling reinforcing principle is utilized, and external wall PC component top cast-in-place portion side mold single-side effective reinforcing is realized.

The invention relates to a lifting hook type shot blasting machine which comprises a cleaning chamber, an electric control system, a dust remover, a separator, a lifter, a shot supply system, an openable shot blasting door and a spiral conveying system. A lifting hook turntable mechanism and two shot blasting devices are arranged in the cleaning chamber, the spiral conveying system is located at the lower part of the cleaning chamber, and the lifter is arranged on the side face of the cleaning chamber; the separator is arranged on the side face of the lifter and communicates with the dust remover through a closed pipeline; the shot supply system is arranged on one side of the lifting hook turntable mechanism, and the openable shot blasting door is arranged below the shot supply system; and the shot blasting devices are fixed to the openable shot blasting door, and a noise reduction safety protection device is arranged on the other side of the lifting hook turntable mechanism.

The invention provides a chromium-vanadium series hot rolled steel wire rod and a preparation method thereof, and a preparation method of a steel wire and a hand tool, and belongs to the technical field of wire rod steel. The chromium-vanadium series hot rolled steel wire rod comprises Mn and Cr with the total content of 1.25-1.55 wt%, the chromium-vanadium series hot rolled steel wire rod is obtained by rolling a casting blank, and the segregation index Pcr of an alloy core of the casting blank is smaller than or equal to 1.10. The preparation method of the chromium-vanadium series hot rolledsteel wire rod comprises the steps of rolling, spinning and cooling of the casting blank. The preparation method of the steel wire comprises the step of directly carrying out cold drawing treatment on the chromium-vanadium series hot rolled steel wire rod without spheroidizing annealing treatment. The preparation method of the hand tool comprises the steps that a steel wire is directly subjectedto cutting machining without intermediate annealing treatment, and then quenching treatment and tempering treatment are conducted in sequence. The steel wire rod can be directly cold-drawn to producethe steel wire without annealing, so that the processing cost of producing the steel wire by the steel wire rod is greatly reduced.

The invention discloses a horizontal soil reinforcement method for a subway open-cut foundation pit. The specific steps of the horizontal soil reinforcement method for a subway open-cut foundation pit are as follows: S1: construction of drainage facilities, S2: removal of obstacles at the bottom of the open-cut foundation pit Object, S3: Ramping the foundation pit foundation, S4: Surveying and mapping of the width and depth of the foundation pit, S5: Stock preparation for reinforcing steel bars, S6: Pouring reinforced concrete, S7: Surveying and mapping the reinforced concrete surface formed in the step S6 again, S8: Construction of piles, S9: construction of superstructure, the present invention first constructs drainage facilities, prevents excessive water accumulation, ensures unobstructed foundation pit, reduces construction difficulty, adopts high-pressure jet grouting, high work efficiency, and through vibration The stick removes the residual air bubbles in the concrete in time, improves the quality of concrete pouring, and ensures the reinforcement of the foundation pit. In the surveying and mapping of the width and depth of the foundation pit, at least 3 surveys and mappings are carried out, and the final value is the average value of the 3 surveys to ensure that the surveying and mapping the accuracy of the results.