1136 results about "Shear resistance" patented technology

The invention relates to the technical field of building structures, in particular to a method for calculating node shear bearing capacity of a composite beam, which comprises the following steps of: decomposing the shear bearing capacity of a node core area into shear contribution components of a square steel tube web, encased concrete and a steel wire mesh, and respectively calculating the shear bearing capacity based on respective structural characteristics and stress mechanisms; the total shear bearing capacity is obtained through superposition; and each component is quantized by introducing correction coefficients of an axial compression ratio and a beam-column linear stiffness ratio. According to the method, the technical blank of shear resistance calculation of the concrete joint in the core-free area is filled, the error is controlled within + / -15%, and the method has the characteristic of high precision, is suitable for design of the composite beam joint filled with the concrete in the core-free area in a high-rise building and an underground structure, is high in engineering applicability and provides a reliable calculation basis for design of related building structures.

The invention belongs to the technical field of gate shaft construction, and particularly relates to a one-time forming pouring system and a one-time forming pouring method. The gate groove formwork and the vertical shaft sliding formwork assembly in the one-time forming pouring system can move in the depth direction of the gate shaft and jointly define a pouring ring, and when the strength of hydraulic concrete structures corresponding to the vertical shaft sliding formwork assembly and the gate groove formwork reaches the demolding strength, the gate groove formwork and the vertical shaft sliding formwork assembly are separated. The positions of the vertical shaft sliding formwork assembly and the gate groove formwork can be adjusted through the lifting device and the hoisting device, so that the pouring space rises in the depth direction of the gate shaft, continuous pouring of the hydraulic concrete structure is met, pouring of the hydraulic concrete structure does not need to be conducted step by step, joints are avoided, and the construction efficiency is improved. The integrity and shear strength of the hydraulic concrete structure are improved, so that the construction quality of the hydraulic concrete structure in the gate shaft is ensured, and meanwhile, the construction difficulty is reduced.

The invention provides a system and method for testing the shear resistance of an anchoring structural plane under water-force coupling, and the system comprises a prestress loading device which provides a prestress for an anchoring body sample, so that the structural plane is provided with a water flow channel with controllable opening degree; the shearing device is used for applying shearing force to the anchoring body sample to enable the structural surface to slide so as to damage the mortar protective layer; the high-pressure corrosion device is used for providing an osmotic pressure environment for the anchoring body sample so that a corrosion solution permeates into the structural surface to corrode the anchor cable, and the data acquisition device is used for monitoring sliding displacement, shearing force, pulling force, water pressure and ion concentration of the structural surface; the anchor cable corrosion damage coefficient calculation device is used for obtaining an anchor cable corrosion damage coefficient in the anchoring structure surface; the residual shear strength calculating device is used for obtaining the residual shear strength of the anchored structural surface after corrosion; and the anchoring body safety evaluation device is used for evaluating the safety state of the anchoring body. The method solves the problem of testing the residual shear strength of the anchoring structural surface considering the corrosion damage of the anchor cable under the synergistic effect of multiple factors.

Disclosed in the present application is a cast-in-place prefabricated building formwork component suitable for columns or beams, comprising a columnar formwork and stirrups fixed to the formwork; the upper and lower ends of the formwork are provided with connection fitting parts that fit adjacent formworks; the formwork is defined by steel plates; the stirrups are jointly formed by the steel plates and rod-shaped members fixedly connected to inner side surfaces of the steel plates. In addition, further disclosed in the present application are a cast-in-place prefabricated building shear wall component and a cast-in-place prefabricated building floor slab component. A stress test result proves that structures such as columns and beams formed by the cast-in-place prefabricated building formwork component in the present application can have a better constraint effect on concrete cast inside, and particularly increase a constraint area, thereby improving the overall shear resistance and bearing capacity of buildings, and having great significance for seismic resistance of the buildings in earthquakes.

The invention relates to the technical field of consolidation structures, in particular to a tower beam pier consolidation structure of a swivel cable-stayed bridge, a tower beam pier consolidation area comprises a partition plate, a stiffening plate, a shear nail, a prestress pull rod set and consolidation concrete, the tower beam pier consolidation area is consolidated with a cable bent tower, a pier and a main beam at the same time, the cable bent tower penetrates through the main beam from top to bottom, and the pier penetrates through the main beam. Concrete in the tower beam pier consolidation area, tower column concrete of the cable bent tower and bridge pier concrete are poured into a whole together, it is guaranteed that steel and concrete in the tower beam pier consolidation area are stressed and deformed together, and the problems that a traditional tower beam pier consolidation structure is weak in bonding performance and insufficient in torsional shear resistance are solved.

The invention relates to the field of fabricated buildings, in particular to a fabricated building frame structure beam-column joint structure and an implementation method, and the beam-column joint structure comprises a reinforced concrete prefabricated column and a reinforced concrete prefabricated beam. A column cap is arranged on the top of the lower-layer column, a prefabricated column reserved anchoring longitudinal bar on the column penetrates through the column cap and is connected with an upper-layer column longitudinal bar anchoring hole, and a grouting hole and an exhaust hole are formed in the side face of the upper-layer column. One end of the precast beam is lapped on the column cap, a horizontal anchoring rib is reserved on the lower portion of the beam and extends to the joint, a precast beam stirrup is exposed out of the top, secondary cast-in-place concrete is laid on the top, a formwork is connected to the side face, a reserved groove is formed in the joint side, and a bed mortar layer is arranged at the bottom of the upper-layer column. According to the structure, the bearing and shearing resistance of beam-column joints is enhanced, and the stability and shock resistance of the frame are improved; prefabricated parts are produced in factories, efficiently assembled on site, matched with standard construction procedures, shortened in construction period and matched with industrial production, development of fabricated buildings is effectively promoted, and the problems of node connection and construction efficiency of existing fabricated structures are solved.

The utility model relates to the technical field of steel structure shear resistance, in particular to a novel steel structure shear key which comprises a high-strength bolt and a sleeve which are sleeved together, the top of the sleeve is inserted into a pre-embedded plate of a steel column foot or a support, and the top of the sleeve is in threaded connection with the pre-embedded plate and then is welded and reinforced under the plate in a surrounding mode. The sleeve is embedded into a foundation and fixedly connected with the foundation, and the high-strength bolt is screwed into the sleeve through the top of the sleeve and fixedly connected with an upper layer component through a nut. The high-strength bolt and the sleeve which are sleeved with each other are adopted to replace existing H-shaped steel and square steel, only a small installation gap is needed, steel bars at the joint are easy to process, the influence on anchoring connection of concrete and the steel bars at the connecting position can be reduced to the maximum extent, the embedded part is machined in a factory, and the construction cost is reduced. And the connection precision and quality are guaranteed, only high-strength bolts need to be screwed in and screwed to the installation torque on site, and the effect is good through practice inspection.

The invention relates to a construction method and construction equipment for a high-pressure jet grouting pedestal pile. The construction method comprises the steps that S1, the equipment enters a site; s2, taking a fixed pile cylinder, and pressing the fixed pile cylinder to a bearing stratum at a pile position; s3, the soil body in the hollow part of the fixed pile cylinder is taken out; s4, jet grouting cutting or expanding cutting is carried out in the undisturbed soil body at the bottom of the fixed pile cylinder to form an expanded pit; s5, molded concrete is fed into the expanded pit in a pressed mode, the molded concrete is limited to upwelling in the hollow part of the fixed pile barrel, and cemented soil in the expanded pit is extruded into the undisturbed soil body on the peripheral side of the expanded pit and the gap between the fixed pile barrel and the pile hole; an expanding body, a lower surrounding body, a reinforcing body and an upper surrounding body are respectively formed; and S6, concrete is poured into the hollow part of the fixed pile cylinder to form a pile body. During construction, surrounding soil is basically not disturbed, noise is low, the pile can be exploded, the upper surrounding body and the lower surrounding body which are integrally solidified and formed wrap and protect the joint part between the pile body and the expansion body, and the anti-shearing capacity of the joint part of the pile body and the expansion body can be greatly improved.

The utility model discloses a fire-fighting wire with high shear resistance, and belongs to the technical field of fire-fighting cables. The fire-fighting electric wire with the high shear resistance comprises an inner core layer, the inner core layer is composed of a battery cell and an inner mica layer, the outer portion of the inner core layer is connected with a functional layer in a wrapping mode, the functional layer comprises an isolation layer, the outer side of the isolation layer is connected with an outer mica layer in a wrapping mode, the outer side of the functional layer is connected with a shear resistance layer in a wrapping mode, and the shear resistance layer comprises an annular wire hoop. The outer side of the wire is provided with a wire hoop, the outer side of the wire hoop is provided with anti-shearing metal wires in a circumferential array mode, the anti-shearing metal wires and the wire hoop are connected in a hot melting mode, the anti-shearing layer is connected with an outer layer in a wrapping mode, the outer layer comprises a rubber layer, and the anti-shearing layer is located in the rubber layer. And the inner mica layer and the outer mica layer are utilized, so that heat insulation protection can be conveniently carried out on the internal battery core, and the fire resistance during use is improved.

The invention relates to the technical field of material detection, in particular to a solid wood furniture material detection method and system.The method comprises the following steps that form data of a furniture bearing component under the shearing-bending loading condition is obtained, wood connection node imaging is collected, crack displacement is calculated according to a loading sequence, and a fiber bonding point load value is extracted; and calculating the furniture crack growth rate. According to the method, form data is collected through shear-bending loading, crack displacement and fiber bonding point load calculation is achieved, the crack propagation rate is more accurate, the pixel displacement gradient and the maximum shear stress gradient area are combined, the stress concentration point recognition precision is improved, the crack path is tracked based on the local shear stress gradient, and the interlayer energy consumption rate is calculated. Extracting a critical state, identifying a crack instability point, improving damage evolution prediction precision, and improving bending resistance and shearing resistance evaluation comprehensiveness and quality detection reliability in combination with multi-layer stress change and gradient calculation.

An internal and external coupling shear resistance locking control system and monitoring method of tunnel surrounding rocks, comprises an internal shear resistance and monitoring system of tunnel surrounding rocks, an external shear resistance and monitoring system of tunnel surrounding rocks, a relative shear displacement monitoring system of the tunnel walls and the roof and floor layers, and an anchor agent installation system; holes are expanded in the anchor cable drilling holes passing through coal-rock interface areas of the coal walls and roof and floor rock layers to form shear misalignment tolerance cavities; monitoring pressure values of measuring bags and liquid discharge in the shear misalignment tolerance cavities to determine shear deformations of the shear misalignment tolerance cavities, monitoring forces on anchor cables, compensating pull rods and shear resistance steel strips, and adjusting the shear resistance of the anchor cable and steel belt through the compensation rod structure.

Building techniques and structures to fabricate components of expanded polystyrene (EPS) for assembly into a building include structures and ways to make keys to provide shear strength between components, structures and ways to minimize infiltration paths between walls and floors and walls and roof while reducing labor, material wastage and logistics complications. By way of example, components are strategically cut from a block of EPS using a hot wire moving through the block to cut components to a desired and novel configuration.

The invention discloses a gabion gabion net cage system for reinforcing a high-fill embankment of an expressway, belongs to the technical field of gabion gabion net cages, and solves the problems that in the prior art, external loads are resisted only through self-strength, and the gabion gabion net cage system and a filling body are difficult to form a synergistic deformation whole, so that the structure is cracked and fails. The system comprises an excavation roadbed, at least one group of filling slope foundations, gabion gabion gabion net cages and backfill discrete materials, according to the gabion gabion gabion grid net cage, through the synergistic effect of tensile resistance of the steel wire mesh and shear resistance of the block stones, the gabion gabion gabion grid net cage and the filling discrete material form a flexible-rigid composite structure, so that the high tensile property of the steel wire mesh can effectively restrain horizontal displacement and deep slippage of the filling material, and deformation of a side slope along a potential slippage face is restrained; and the gradation matching performance of the block stone filling structure and the backfill discrete materials enhances the occlusion effect between the materials, and the shear strength and the overall rigidity of the slope are remarkably improved.

The invention belongs to the technical field of segment splicing type bridges, and particularly relates to an anti-shearing structure of a segment splicing box girder and a construction method of the anti-shearing structure. The shear-resistant structure comprises a box girder body composed of a top plate, a web plate and a bottom plate, and further comprises two formwork units arranged at the two ends of the box girder body respectively in a pouring fixing mode, and a shell arranged on the formwork units and used for forming a concave key structure or a convex key structure of a shear key. The shear-resistant structure has the beneficial effects that the shear key formwork part of the shear-resistant structure at least comprises the formwork units and the shell, the shear key formwork part can effectively form the box girder body, does not need to be taken down during formwork removal and can also be used as a concave key structure and a convex key structure, and therefore the shear-resistant structure is simple and efficient during manufacturing and construction; and the precision is relatively high during splicing construction.

The utility model discloses a wrapped pile drilling and filling all-in-one machine which comprises a foundation mechanism and an executing mechanism, and the executing mechanism is connected to the foundation mechanism in a lifting mode. The basic mechanism comprises a power assembly, a walking assembly, a stand column and a supporting assembly, the stand column is arranged on one side of the walking assembly in a supported mode and supported through the supporting assembly, and the power assembly is arranged on the walking assembly and used for lifting the executing mechanism; the executing mechanism comprises a drilling assembly and a sleeve, the drilling assembly is arranged on the sliding rail of the stand column in a sleeving mode, and the drilling assembly is sleeved with the sleeve in a liftable mode; the power assembly comprises a main winch and an auxiliary winch. The all-in-one machine is suitable for treating mucky soil and soft plastic clayed soil foundations with undrained shear strength smaller than 20 kPa, and is particularly suitable for punching and pouring construction of saturated salinized soil foundation wrapped piles.

The utility model provides a prefabricated concrete beam dry type connection node, which belongs to the field of prefabricated buildings, and is characterized in that an upper high-strength bolt is arranged above the top surface (within the height of a floor) of a prefabricated concrete beam so as to increase the connection arm of force of the upper high-strength bolt, so that equal-strength node connection with a steel bar in the beam is realized by utilizing a single large-diameter high-strength bolt; the installation convenience is greatly improved; the upper high-strength bolt and the lower high-strength bolt are combined for clamping, so that tensile and compression-resistant bidirectional force transmission is realized (in a normal state, the upper high-strength bolt is tensile, and the lower high-strength bolt is compression-resistant; ), so as to cope with the bending moment change of the precast concrete beam under the action of the reciprocating load.

The invention discloses an angle steel connecting piece shear strength prediction method and system based on a physical information neural network, electronic equipment and a storage medium thereof. The method comprises the following steps: establishing a database containing a plurality of groups of test data based on a numerical simulation result of an angle steel connecting piece finite element model verified by a push-out test; embedding an angle steel connecting piece shear bearing capacity physical constraint condition based on an elastic foundation beam theory into a loss function of the data-driven neural network model DNN; training the neural network embedded with the physical constraint condition by using a database, and adjusting and selecting a physical item weight factor and a model learning rate so as to construct a shear bearing capacity prediction model of a physical information neural network (PINN); predicting the shear strength of the angle steel connecting piece by using the trained physical information neural network (PINN) shear capacity prediction model; according to the prediction method and system, the electronic equipment and the storage medium thereof provided by the invention, the accuracy and reliability of the shear resistance prediction of the angle steel connecting piece can be improved.

The invention particularly discloses a rock-soil body interface torsional shear characteristic and toughness parameter unit body test device which comprises a unit body sample blank manufacturing device, a centering device, a special drilling tool, a rib body and a torque load.The rock-soil body interface torsional shear characteristic and toughness parameter unit body test device has the beneficial effects that traditional direct shear / drawing shear is replaced with torsional shear loading; the problem that the interface contact area is reduced in the shearing process is thoroughly solved, it is ensured that the interface contact area of an anchor / pile and a rock-soil body is constant, a pressure water bag is arranged at the top of a test box unit body, the original overlying and confining pressure environment of a stratum is accurately simulated, a test anchor hole / pile hole is directly manufactured through a drilling technology, and the natural roughness characteristic of the hole wall is reserved to the maximum extent; the smooth wall surface limitation of traditional mold pore forming is broken through, the basic toughness concept of the anchor / pile-rock-soil body interface is defined for the first time, the nature of the basic toughness can be quantitatively represented by the robustness of the shear resistance of the interface, a matched toughness testing technology and evaluation method are developed, and a theoretical model and a calculation tool are provided for the toughness design of anchoring engineering and pile foundation engineering.

The invention relates to the field of underground engineering and rail traffic engineering, in particular to a deformation control method for a double-line shield tunnel to underpass an existing railway soft soil roadbed, which comprises the following steps: S1, determining a grouting reinforcement range; s2, pile position and grouting hole position lofting is conducted in the reinforcing area, and a groove is excavated; s3, construction is conducted after the MJS pile main machine is in place, and drill bit trial spraying is conducted before a drill rod is placed; s4, after the drill rod reaches the specified depth, jet grouting is conducted till the designed elevation is reached, and the MJS pile main machine is moved to the next pile position sample placing point; s5, after the MJS pile reaches the designed strength, a drilling machine is arranged in place, and a formed hole is drilled to the designed depth; and S6, grouting is conducted, and then grouting and grout stopping section construction is conducted. The method has the advantages that corresponding reinforcement measures are taken in combination with the model, the shear strength of the soft soil is improved, the shear damage risk of the soft soil is reduced, deformation of the soft soil roadbed is controlled in time, and safety and stability in the shield underneath pass construction process are ensured.

The invention relates to the technical field of engines, and provides a high-efficiency large-torque rotor engine and a working method. One of a plurality of turbine blades, slope blades and cambered surface blades is arranged in a rotor combustion chamber, the tangential stress area of a rotor is increased, dispersed and efficient combustion is achieved through an ignition channel, thrust in the rotating direction of the rotor is greatly increased, a crankshaft obtains larger torque, the overall acting power is also increased, and the service life of the rotor is prolonged. And the thrust-weight ratio of the rotor engine is improved. The crankshaft is matched with the rotor inner ring gear and the stator gear, so that power transmission of rotor acting is completed. The rotor inner ring gear and the rotor can adopt an integrated or split structure, and are connected through a polygonal embedded structure when being split, so that the torque resistance of the rotor is improved, the shear strength of a connecting bolt can be reduced, and the rotor is suitable for a high-power rotor engine structure. By improving the rotor structure, optimizing the blade design, adopting the polyhedral assembly structure and the like, the acting efficiency, the torque and the overall performance of the engine are improved.

The invention discloses a method for evaluating damage evolution of an underground structure under the action of a sudden explosion load, and relates to the technical field of civil engineering and engineering disaster prevention, and the method is characterized by comprising the following steps: S1, simulating the underground structure based on an explosion load, a geometric boundary and material parameters, and constructing a unified constitutive model; and S2, introducing a pressure-related strength criterion of a Dwark-Prasugrel criterion into the unified constitutive model so as to describe the influence of confining pressure on the shear strength. The technical problem to be solved by the invention is to provide the method for evaluating the damage evolution of the underground structure under the action of the burst explosion load, so that the key pain points such as pressure correlation, high strain rate effect, material random discreteness, damage softening energy consistency and the like are difficult to consider at the same time in the existing analysis method. A set of damage evolution evaluation method and implementation system which can be implemented from the material level to the structure level is established, and quantitative prediction and engineering grading judgment of the whole process of crack initiation, expansion to instability failure of the underground structure are supported.

The invention provides a Z-shaped prefabricated concrete wind power tower drum duct piece and a wind power tower drum. The concrete wind power tower drum duct piece comprises a duct piece lower layer and a duct piece upper layer. The transverse sections of the segment lower layer and the segment upper layer are concentric arcs with the same thickness and the same height and have an overlapped part, the thickness of the overlapped part is twice that of the segment lower layer or the segment upper layer, and the height of the overlapped part is 1 / 4-1 / 2 that of the segment lower layer or the segment upper layer; the overall height of the tower tube segment is 3-4 m. The wall thickness of a tower formed by the Z-shaped prefabricated concrete wind power tower tube segments is twice that of a tower formed by common arc-shaped segments, but the thickness of a single segment is not increased, and the bending resistance of the tower tube is improved while the Z-shaped prefabricated concrete wind power tower tube segments have the light characteristic. The inner layers of every two adjacent layers of annular units are nested in the outer layers, constraint is formed in the radial direction, the influence of pipe piece transverse splicing seams on the stability of the tower barrel is reduced, and the shear capacity of the tower barrel is improved.

The invention discloses a novel self-locking type combined connecting piece for a shield tunnel circular seam and a mounting method, and belongs to the technical field of shield tunnel lining structures. The novel self-locking type combined connecting piece comprises a male plug and two female plugs which are arranged at the two ends of the male plug and used for being fixedly arranged in two adjacent pipe pieces respectively. When the bolt is used, the inverted-truncated-cone-shaped part of the bolt body is used for pushing the four-block cushion block to retreat, the inverted-truncated-cone-shaped part is inserted into the elastic truncated-cone-shaped part of the four-block cushion block, and then the spring is used for pushing the inverted-truncated-cone-shaped part to retreat; and the inner wall of the circular truncated cone hole of the pre-embedded sleeve forces the inner diameter of the opening side of the elastic circular truncated cone part of the four-block cushion block to be reduced, so that the inverted circular truncated cone-shaped part is locked in the elastic circular truncated cone part of the four-block cushion block. Compared with the prior art, the steel-plastic composite board has the beneficial effects that the steel-plastic composite board has tensile and shear-resistant capacities at the same time, and can be quickly assembled.

The invention belongs to the technical field of mining construction, and particularly relates to an artificial roof structure and a construction process thereof. The construction process comprises the steps that S1, anchor rod holes are constructed in the positions, 1 m away from a bottom plate, of two sides of a stope, S2, ore cushion layers with the thickness of 200 mm are laid and leveled, S3, I-shaped steel bottom beams are erected and fixed through round steel anchoring parts and welding base plates, S4, a reinforcing mesh is laid, main ribs and auxiliary ribs are bound in a crossed mode and welded to anchor rods, according to the composite structure design of the double-layer reinforcing mesh, the steel wire mesh and the hanging bar system, a three-dimensional stress system is formed, the bending resistance and the shearing resistance of the false roof are remarkably improved, the problem that a traditional false roof is prone to cracking and sinking is solved, and the false roof has the advantages of being simple in structure, convenient to use, economical and practical. Due to the layered matching design of the full-tailing cemented filling body, the bearing strength is guaranteed, seamless roof contact is achieved, the risk of roof hollowing is reduced, the pressure of stope operation circulation is relieved, the ore removal efficiency is improved, and the mining cost is reduced.

The present invention discloses a low-temperature resistant perfluoroether rubber and a preparation method thereof. In parts by weight, the raw material components include: 80-120 parts of perfluoroether rubber polymer, 1-5 parts of additives, 10-30 parts of fillers, 1-3 parts of cross-linking agents, 1-4 parts of accelerators, 1-3 parts of processing aids, and 1-3 parts of acid absorbers. The present invention prepares a perfluoroether rubber polymer by a two-step polymerization method, and then prepares a low-temperature resistant perfluoroether rubber by mixing the perfluoroether rubber polymer with all mixed auxiliary materials. The perfluoroether rubber provided by the present invention not only has higher hardness, tensile strength, anti-extrusion deformation, shear resistance and low-temperature resistance, can meet the use demand of perfluoroether rubber at 40°C, and also has excellent plasma etching resistance, and can be applied to the semiconductor industry.

The invention discloses a prefabricated shear wall, a building module, a modular building system and an assembly method. The prefabricated shear wall comprises a wall body, at least two steel pipes and at least two bearing grooves. The wall body is used for being vertically placed, the steel pipes are embedded in the wall body, the steel pipes vertically extend and are spaced in the horizontal direction, and the steel pipes downwards extend out of the wall body by a preset length. The bearing grooves are formed in the wall body, the bearing grooves and the steel pipes are correspondingly arranged in the height direction of the wall body, the bearing grooves are located above the corresponding steel pipes, and openings of the bearing grooves face upwards and vertically extend downwards by a preset depth. The prefabricated shear wall can be prefabricated in a factory and cast-in-place, connected and fixed, operation is easy, and the building efficiency is high. The prefabricated shear wall can be stacked up and down for construction, the upper-layer wall body and the lower-layer wall body are connected through the steel pipes, compared with traditional steel bar connection, higher shear resistance is provided for a building structure, and the requirement for modular or fabricated construction of a super high-rise building can be met.

The invention discloses a magnet structure based on the mortise and tenon principle and an assembling method, the magnet structure comprises magnets, a plurality of magnets are connected end to end to form a ring, and mortise and tenon connection sections are processed at the head and tail ends of the magnets; when every two magnets in the tenon-and-mortise connection section are connected end to end, mechanical interlocking can be formed by assembling according to the tenon-and-mortise principle and meshing assembling between the grooves and the bosses, so that the stability of the magnets is greatly improved, and the assembling efficiency is improved. The overall mechanical stability is effectively improved, and the anti-shearing force is improved by about 18.7% through the mortise and tenon joint structure (compared with plane structure bonding). The magnetic performance is that the surface magnetic field of the magnetic ring assembled by the tenon-and-mortise structure is almost unchanged (compared with plane structure bonding). And the qualified rate of the product is increased to 90% from the original 50% in the process of producing, manufacturing and processing the magnetic ring.

The invention relates to the technical field of embankment reinforcing and widening, and provides an embankment widening construction method based on biomineralization and reinforcement cooperation. The microcosmic cementation effect of calcium carbonate precipitation in the inclusion is induced by the enzyme and is combined with the macroscopic constraint of the geogrid, so that a friction-cementation composite interface is formed, and the shear resistance and impermeability of the new and old roadbed combined surface are greatly improved. Meanwhile, the synergistic enhancement transition area serves as a rigidity coordination layer, loads can be effectively homogenized, differential deformation can be effectively absorbed, and therefore differential settlement is restrained, and reflection cracks are prevented. According to the method, the microcosmic cementation strengthening capacity of enzyme-induced calcium carbonate precipitation and the macroscopic reinforcement restraining capacity of the geotechnical reinforcement material are subjected to space coupling and function cooperation, the weak area of the widened embankment is fundamentally improved, and the integrity and long-term stability of the widened embankment are remarkably improved.

The invention discloses an automatic assembly method and an automatic assembly line for a high-shear-resistance rivet. The automatic assembly method comprises the following steps that S1, a core rod feeding unit is started; s2, a ring feeding unit is started; s3, a rivet body feeding and tightening unit is started; s4, product detection; and S5, a finished product discharging unit is started, a discharging mechanical arm is used for clamping the qualified high-shear-resistance rivet products and placing the qualified high-shear-resistance rivet products in a collecting material frame, the products are manually taken away after the collecting material frame is full, and automatic assembling of the high-shear-resistance rivet products is completed. According to the automatic assembly method and the automatic assembly line, the intelligent assembly technology is applied, the automatic design and the PLC automatic control technology are adopted, high-shear-resistance rivet product assembly automation is achieved, manual production is replaced with automatic equipment, the productivity utilization rate of existing equipment is effectively increased, the labor condition is improved, and the production efficiency is improved. The labor intensity is reduced, the stability and consistency of the product assembly quality are improved, the product production efficiency is improved, and the requirement for high-quality delivery of products is met.

The invention discloses a low-temperature connecting method for glass and a C / C composite material, and relates to a connecting method for the glass and the C / C composite material. The problems that the performance of a base material is reduced and interface bonding is poor due to the fact that the connection temperature of an existing C / C composite material and glass is too high are solved. According to the method, firstly, a metal modified layer is prepared on the surface of the C / C composite material through magnetron sputtering, a carbide reaction layer is generated at the interface of the composite material, then connection of the C / C composite material and microcrystalline glass is achieved at the temperature of 580-660 DEG C through Bi2O3-B2O3-ZnO glass brazing filler metal, a microstructure mainly comprising a glass phase is formed in a welding seam, and the welding seam is formed. A continuous reaction layer is generated at the interface of the glass brazing filler metal and a glass base material, the glass brazing filler metal and the C / C composite material are connected through direct combination of oxides on the surface of a metal modified layer, and formed welding seams are compact and free of defects such as air holes and cracks. And the shear strength of the obtained joint can reach 13MPa.