55 results about "Horizontal shear" patented technology

The application relates to an anti-seismic building pile foundation, and relates to the technical field of building pile foundations. The anti-seismic building pile foundation comprises a base body, the outer side of the base body is provided with a plurality of main support columns, a plurality of grooves are formed in the outer side surface of the base body and are fixedly connected with first fixing shells, one end of each main support column is fixedly connected with a first fixing block, the first fixing blocks are arranged in the first fixing shells respectively, and a secondary support column is arranged on the side surface of each main support column. Compared with a traditional single columnar pile foundation, the anti-seismic building pile foundation can disperse seismic loads in multiple directions, can transmit transverse seismic forces to a wider soil area through multiple levels of support, and can solve the problems that the anti-seismic building pile foundation with a single columnar structure has limited horizontal shear resistance, is prone to pile body fracture and inclination under the action of strong seismic loads, and the problems are more prominent, especially in soft soil foundations or high-intensity seismic areas.

The invention discloses a method for calculating horizontal bearing deformation of a pile bucket foundation based on a multi-spring model. The method comprises the following steps: determining geometric parameters, soil body parameters and load parameters of the pile bucket foundation; according to a pile barrel foundation structure, foundation segmentation treatment is conducted, and the foundation is divided into a barrel reinforcing section and a barrel non-reinforcing section; establishing four spring models of the pile barrel foundation; determining the position of the rotation center; establishing and discretizing a control equation; and carrying out nonlinear equation set solution, and outputting a converged load-displacement curve and other distribution maps through iterative solution. According to the method, the p-y springs, the side impedance torque springs, the foundation anti-torque springs and the foundation horizontal shear springs are introduced, foundation failure modes and soil body constraint conditions under different pile barrel combinations can be fully considered, and the accuracy of calculation of the horizontal bearing deformation parameters of the pile barrel foundation is ensured.

The utility model relates to a transverse impedance multidirectional damping steel spring device which comprises a spring outer sleeve (1), a steel spring (5) and a spring inner sleeve, the spring inner sleeve comprises a spring inner sleeve cover (2) and a spring inner sleeve base (6), and a transverse impedance elastic body (3) for transverse limiting is arranged between the spring outer sleeve (1) and the spring inner sleeve base (6). Compared with the prior art, three-direction damping amplification is adopted, besides the main vibration isolation direction, the stability and vibration in the direction perpendicular to the main vibration isolation direction of the spring can be controlled, and meanwhile the problem that the spring is subjected to transverse shearing dynamic load to cause fatigue fracture and failure of the spring is solved; therefore, the transverse stability and reliability are improved, and the service life of parts is prolonged.

A method, system, device, and readable storage medium for predicting leading-edge bulging cracks are disclosed, relating to the field of geological disaster monitoring and early warning. Specifically, the method includes determining the active thrust of the landslide on the leading edge based on the landslide mass weight, sliding surface dip angle, seepage hydrodynamics, and additional thrust, wherein the additional thrust is generated by external dynamic disturbance. When the detected active thrust is not less than the passive earth pressure limit, the target vertical bulging displacement is determined based on horizontal shear displacement, maximum dilatation angle, geometric correction factor for shear zone thickness, hydraulic correction factor, initial effective stress, real-time effective stress, and dilatation angle stress sensitivity factor. The predicted leading-edge bulging crack result is determined based on the target vertical bulging displacement and the predicted vertical bulging displacement. This application can improve the accuracy and applicability of leading-edge bulging crack prediction.

This invention discloses a prefabricated staircase and its construction method, relating to the field of prefabricated building construction technology. By setting up the staircase body and two anchoring structures, under normal use, the anchoring structures provide sufficient vertical bearing capacity and horizontal shear resistance, ensuring the overall stability of the staircase. In the event of sudden disasters such as earthquakes, due to the presence of through-type anchor bodies within the anchor holes, when the stair slab participates in resisting lateral forces in the main structure, the shear force is mainly distributed to the load-bearing beam through the anchor bodies in the anchor hole area, rather than concentrated at the single lap interface between the stair slab and the load-bearing beam. This effectively avoids concentrated shear failure caused by the short column effect at the stair slab ends due to abrupt changes in stiffness, reducing the risk of brittle shear failure of the stair slab, thereby protecting the prefabricated staircase components from severe damage. The staircase is less prone to overall collapse or severe displacement, which helps maintain the relative unobstructed escape route during earthquakes and increases the possibility of safe evacuation.

The utility model discloses a novel damping device for an elevator main engine, which belongs to the technical field of damping devices and comprises a support component, the support component comprises a first support plate, a spherical hinge support plate is integrally arranged above the first support plate, a spherical core is hinged inside the spherical hinge support plate, and a second support plate is arranged above the spherical hinge support plate. A second support plate is integrally arranged at the top of the ball core; a plurality of groups of belleville springs are connected between the first support plate and the second support plate; and the honeycomb base plate is connected to the upper surface of the second support plate, and the center of the honeycomb base plate is fixedly connected with a threaded connecting rod. Three-degree-of-freedom bearing is achieved through the supporting assembly, vertical pressure, horizontal shearing force and torsional moment are borne at the same time through cooperation of a ball core and a sliding interface, a three-dimensional stress system is formed, meanwhile, load uniformization is achieved, stress distribution is uniform through the spherical surface contact design, and local stress concentration is avoided.

The invention provides a calculation optimization method for an arch and cross beam combined section of a separated steel truss girder arch bridge, and belongs to the technical field of civil engineering, and the method comprises the following steps: determining a shear-resistant section according to the arch and cross beam combined section structure and a force transmission path, and determining main shear-resistant plates and welding seams; setting constraint conditions, and calculating to obtain vertical and horizontal shear forces of the shear-resistant section; solving the shear stiffness of a shear resistant plate and a welding seam by utilizing a shear stiffness calculation formula of a connecting plate of the arch and the cross beam and the welding seam after correction, and distributing shear force to calculate the force transmission of the plate and the welding seam; calculating the average shear stress of the force transmission plate and the weld joint, constructing a shear stress function, and calculating the maximum shear stress; introducing a strength check coefficient to judge a shear stress result, and optimizing the thickness of a combined section plate and the number of partition plates to obtain a structure optimization scheme; the method solves the problems that an existing arch and cross beam combined section optimization calculation method is huge in workload, complex in process and long in structure checking calculation time.

The application relates to a skate and a method for determining the friction coefficient of the skate. The skate comprises a shoe body, a blade, an upper connecting piece, a lower connecting piece and a sensor. The shoe body is connected with the upper connecting piece, and the blade is connected with the lower connecting piece. The sensor is located between the upper connecting piece and the lower connecting piece and is connected with the upper connecting piece and the lower connecting piece. The sensor is used for acquiring and sending the horizontal shear force and the vertical normal pressure between the upper connecting piece and the lower connecting piece. The sensor connected between the upper connecting piece and the lower connecting piece of the skate can acquire and send the horizontal shear force and the vertical normal pressure between the upper connecting piece and the lower connecting piece, and the friction coefficient between the skate and the ice surface can be calculated according to the horizontal shear force and the vertical normal pressure, so that the technical problem that the existing testing instrument cannot measure the friction coefficient between the skate and the ice surface in a dynamic process is solved. Meanwhile, the skate has the characteristics of simple structure, compactness and convenience in wearing.

The application discloses a kind of wood construction ancient building horizontal bearing stability evaluation method, comprising: step one, the mechanical property parameters of each wood component in wood construction ancient building are obtained;Step two, the three-dimensional entity geometric model of wood construction ancient building without column geometric defect is constructed;Step three, the measured inclination of each column in wood construction ancient building is measured;Step four, the mechanical simulation analysis model of wood construction ancient building without column geometric defect is established;Step five, the geometric defect of wood construction ancient building due to deterioration damage or / and external load action is simulated;Step six, the horizontal shear value of each column in wood construction ancient building is obtained;Step seven, column applies horizontal shear value, the stress state of wood construction ancient building is simulated;Step eight, the V j -U j Relationship curve of each column is drawn;Step nine, wood construction ancient building horizontal bearing stability index β v The application solves the technical problems that the traditional evaluation method is difficult to operate, has no quantitative index and is unsafe.

The present application relates to a VTI medium shear wave anisotropy parameter estimation method based on seismic shear wave inversion. It includes obtaining seismic shear wave data and well logging data; determining shear wave anisotropy parameter well data according to the well logging data; determining VTI medium shear wave inversion initial model according to the seismic shear wave data and the shear wave anisotropy parameter well data; determining synthetic data according to the VTI medium shear wave reflection coefficient improved approximate equation; determining the objective function according to the seismic shear wave data, the synthetic data and the VTI medium shear wave inversion initial model; determining the VTI medium shear wave inversion result by using the objective function; and determining the VTI medium shear wave anisotropy parameter according to the VTI medium shear wave inversion result. The present application inverses the shear wave impedance and the horizontal shear wave velocity, and obtains the relationship between the shear wave impedance and the vertical shear wave velocity according to the well logging data, so as to estimate the shear wave anisotropy parameter, and effectively realize the seismic shear wave inversion for anisotropic medium.

The invention provides a multi-spring analysis method for horizontal bearing deformation of a large-diameter foundation of an offshore wind turbine. The multi-spring analysis method comprises the following steps that the geometric dimension and material attributes of the large-diameter single-pile foundation are determined; determining mechanical parameters of a soil body; bending deformation of a pile body is regarded as an Euler-Bernoulli beam problem, and the pile body is discretized through a finite element method; deriving an element stiffness matrix on the basis of an Euler-Bernoulli beam theory; a transverse soil spring is arranged at a node, and the tangent rigidity is calculated by adopting a hyperbolic p-y curve; a rotary spring is arranged to simulate pile-soil interface rotation damping, and a nonlinear m-theta curve is adopted; a pile bottom horizontal shearing force spring and a pile bottom bending moment spring are arranged, and a hyperbolic curve type relation is adopted; and assembling a global stiffness equation, and carrying out iterative solution by using Newton-Raphson. According to the method, the nonlinear interaction of the four soil springs is comprehensively considered, high-precision pile foundation response prediction is achieved, and the limitation that only p-y springs are considered in a traditional method is overcome; and node concentrated load or node distributed load can be freely applied, so that the calculation efficiency and the engineering applicability are remarkably improved.

The application discloses a construction method of a pile well type caisson wharf structure, which comprises the following steps: sinking prefabricated gravity type caissons to a leveled base bed, arranging a pile foundation system in the gravity type caissons, arranging one pile foundation in each compartment of the gravity type caissons, extending the lower end of the pile foundation into a bearing layer, locating the upper end of the pile foundation in the gravity type caissons, filling backfilling materials in the compartments of the gravity type caissons and tamping to connect the part of the pile foundation in the gravity type caissons and the gravity type caissons into an integrated whole. The construction method of the application improves the adaptability to the foundation, reduces the dredging and leveling process, and can improve the vertical bearing capacity, horizontal shear resistance and overturning resistance of the caisson, effectively prevents the collapse of the land surface, further optimizes the construction process and operation environment, and promotes the quality improvement of the gravity type caisson wharf in the port engineering.

The invention relates to the field of wind power detection, and discloses a novel paired blade root bidirectional composite loading test device, which comprises a vertical actuator, a gantry frame, a load sensor, a loading frame, blade roots, a guide device, a horizontal actuator I, a horizontal actuator II, a cast iron platform and a connecting rod, wherein the gantry frame is fixedly installed on a cast iron platform, the vertical actuator is arranged at the top of the gantry frame, one end of the load sensor is connected with the vertical actuator, the other end of the load sensor is connected with the loading frame through a connecting rod, and the loading frame is arranged corresponding to the upper portion of a blade root and connected with the blade root. And the guide device is arranged on the cast iron platform and corresponds to the lower part of the blade root. Axial load is applied to the blade root through the vertical actuator via the loading frame, horizontal lateral load is applied through the first horizontal actuator and the second horizontal actuator via the guiding device, and the combined load states of axial tension / compression, horizontal shearing and the like borne by the blade root in actual service at the same time can be accurately simulated.

The utility model relates to the field of steel structures, and discloses a shear-resistant reinforced connecting plate for a steel structure, which comprises a supporting frame, a plurality of supporting columns are fixedly connected in a support, two fixing pieces are in threaded connection with the outer parts of the supporting columns, a foundation is fixedly connected with the outer parts of the supporting columns, and the foundation is in threaded connection with the outer parts of the supporting columns. A plurality of inclined supporting rods are fixedly connected into the foundation, a groove is formed in the foundation, a shear key is fixedly connected to the bottom of the support, and a plurality of stiffening ribs are fixedly connected to the left side and the right side of each supporting frame. The inclined supporting plates in the foundation are distributed in a triangular mode, the shear bearing capacity of the joint is improved, the shear key is embedded into the groove of the foundation to form a mechanical meshing structure, and therefore horizontal shear force can be effectively resisted, relative slippage between the support and the foundation is prevented, the shear bearing capacity of the joint is greatly improved, and the shear effect is achieved.

The utility model discloses a connecting structure with a swing self-resetting function, which relates to the technical field of quakeproof structure systems with recoverable functions and comprises an upper structure and a foundation. A support mounting layer is formed between the bottom of the upper structure and the top of the foundation; the support installation layer comprises a buttress fixed to the top face of the foundation, a vertical tension and compression elastic support is connected between the buttress and the bottom face of the upper structure, and the vertical tension and compression elastic support does not restrain horizontal lateral movement of the upper structure, only provides tension and compression bearing capacity and does not bear any shear bearing capacity in the horizontal direction. According to the connecting structure with the swing self-resetting function, different from a traditional horizontal shearing shock insulation principle, the upper structure generates rigid body rotation around the vertical tension and compression elastic support at the center, and the upper structure is allowed to integrally swing within the range allowed by the design; energy is absorbed and dispersed through deformation of the vertical tension and compression elastic support, residual displacement after an earthquake can be effectively controlled, and great economic significance and social value are achieved.

The invention provides a multifunctional geosynthetic material direct shear pull-out test device which comprises a test rack, the top of the test rack is fixedly provided with a shear box temperature control box used for placing an upper shear box and a lower shear box and controlling the internal temperature of a box body, and the shear box temperature control box is connected with a refrigeration control system; a workbench for mounting the upper and lower shear boxes is arranged at the bottom in the shear box temperature control box; a vertical loading device for providing vertical shearing force is arranged right above the shear box temperature control box, and a horizontal loading device for providing horizontal shearing force is arranged on one side of the shear box temperature control box; the horizontal loading device and the vertical loading device are fixedly connected through a reinforcing inclined rod; a conveying roller way is arranged on the opposite side of the horizontal loading device, and the tail end of the conveying roller way is in butt joint with the freezing and thawing cycle test box body. The device can be used for performing an interface friction test between a geosynthetic material and a soil body, a direct shear friction test and a drawing friction test are integrated into one device, and a shear box temperature control box and a cooling liquid temperature control box are arranged at the same time to jointly adjust the temperature of a sample.

This invention relates to a prefabricated column segment with a vertically stacked, swingable, sliding interlayer, comprising load-bearing segments, flexible polyurea rings, load-bearing ellipsoidal cores, and enclosures. Multiple load-bearing segments are vertically stacked and interlocked. Load-bearing ellipsoidal cores are positioned between adjacent segments, and flexible polyurea rings are placed outside the ellipsoidal cores. The enclosures enclose the spaces between the upper and lower load-bearing segments. This invention allows for a certain degree of horizontal shear displacement and vertical opening and closing behavior at the segments, enabling multi-layered swinging and sliding mixed motion in the prefabricated column. This enhances the column's deformation capacity. The friction of the contact surfaces of the multiple vertically stacked rings dissipates a large amount of energy, transforming concentrated, irreversible damage into distributed, controllable, and recoverable displacement. Damage occurs in replaceable components, while the main concrete segment remains elastic and undamaged. After an earthquake, replacing specific components allows the structure to return to its original position and function, improving the post-earthquake functional recoverability of the prefabricated column and enhancing its seismic toughness.

The present application relates to a kind of skewback type abutment stress calculation method, the force and bending moment of abutment are converted, including axial pressure N, longitudinal shear force Fx, horizontal shear Fz, longitudinal bending moment Mz, transverse bending moment Mx and torque My, then according to stress balance, force and moment are distributed in the abutment slope and its vertical imaginary plane, i.e. the stress of any point on the abutment slope and imaginary plane can be directly calculated using the stress formula of eccentric compression rectangular section, abutment slope, imaginary plane and base horizontal plane form right triangle geometric relationship, can be calculated according to the geometric projection relationship, vertical stress balance and bending moment balance, the base stress of any point on base horizontal plane, greatly simplify the calculation process, the method is solved according to the most direct direction of force transmission path, the solution result is also the actual stress of abutment base, not component force, and the calculation method is simple and applicable.

The invention discloses a one-way horizontal shearing guided wave electromagnetic ultrasonic excitation device based on a double-V-shaped coil. The device comprises the double-V-shaped coil, a magnet, an electromagnetic shielding shell and a tested workpiece. The double-V-shaped coil is arranged right above a workpiece to be detected, and the magnet is arranged above the coil and packaged in the electromagnetic shielding shell with a downward opening. The double-V-shaped coil is horizontally and symmetrically arranged in an inflection manner; the upper layer coil and the lower layer coil are relatively staggered by 1 / 4 one-way horizontal shearing guided wave wavelength along the horizontal shearing guided wave propagation direction, and 90-degree phase difference excitation is kept; the magnet is composed of four bar magnets which are alternately arranged according to SN poles. The configuration can efficiently excite horizontal shear guided waves which are propagated unidirectionally, improves the detection sensitivity of defects on the surface of a workpiece and near the surface in a specific direction, and is suitable for a scene needing directional selectivity nondestructive detection.

The application discloses a prefabricated pier column and a connecting structure thereof. The prefabricated pier column comprises a lower pier column and an upper pier column. The upper part of the lower pier column is provided with a socket step. The upper part of the socket step is provided with a connecting ring. The lower part of the upper pier column is provided with a connecting groove. The inner wall of the connecting groove is provided with connecting ribs. The connecting rings are arranged between the connecting ribs to form ring arrangement positions. The groove opening of the connecting groove forms a socket groove opening. The connecting structure adopts the prefabricated pier column. The upper end surface of the lower pier column is attached to the lower end surface of the upper pier column. The socket step is attached to the socket groove opening. The connecting ring is inserted into the connecting groove and forms a clearance fit with the connecting ribs. The connecting groove is poured with concrete. The connecting ring in the shape of Ω is designed with double functions, which can be used as a structural connecting piece and a hoisting point. The stress is uniformly distributed through the curvature optimization of the ring body. The stepped socket opening is provided with double positioning surfaces, the vertical positioning precision is high, and the horizontal shear bearing capacity can be improved.

The utility model relates to the technical field of cat litter production, and discloses a stirring device for manufacturing cat litter, which comprises a box body, a partition plate, a mixing and crushing cavity, a screening cavity, a caking and crushing cavity and a discharging cavity. A feeding opening is formed in the top of the box body, and the interior of the box body is divided into multiple stages of functional chambers through partition plates; a first stirring shaft is arranged in the mixing and crushing cavity, stirring blades, vertical stirring rods and spring stirring rods are mounted on the surface of the first stirring shaft in a staggered manner, and raw material layering is broken through cooperation of horizontal shearing, vertical turning and flexible disturbance, and caking is crushed; a screening plate is obliquely arranged in the screening cavity and is matched with a vibration motor and a buffer spring to realize high-frequency linear vibration, and qualified particles and unbroken cakes are separated; the cake crushing cavity drives staggered crushing blades to secondarily crush cakes through a third stirring shaft, and waste materials are recycled after being filtered by a screen; variable-pitch feeding paddles are adopted in the discharging cavity, the front end is compacted, discharging is accelerated at the rear end, and the flowing efficiency is improved in combination with an inverted-cone-shaped wear-resistant discharging opening.

The utility model discloses an anti -seismic reinforced concrete wall structure relates to wall body reinforcing technical field, the anti -seismic reinforced concrete wall structure includes beam body, original column body and reinforced concrete wall body, and reinforced concrete wall body includes second reinforced structure and wall body ontology, and second reinforced structure includes multiple cross -steel bars and multiple vertical steel bars, and multiple vertical steel bars are located in wall body ontology and part structure is anchored in the upper beam body structure of beam body, and multiple vertical steel bars and multiple cross -steel bars are perpendicular fixed to each other to form frame structure, and the part structure of multiple cross -steel bars is anchored in the fixed column of original column body, and another part structure of multiple cross -steel bars is located in wall body ontology, guarantees the horizontal shear force effective transmission of reinforced concrete wall body, to through cross -steel bar and original column effective anchoring, makes reinforced concrete wall body, original column body, beam body collaborative force, effectively disperses load, avoids stress concentration, and the anti -seismic effect of reinforced concrete wall body is good, and then improved the anti -seismic effect of building.

The utility model discloses an anti-shearing-force elastic support for a building warm corridor. The problem that when a warm corridor faces transverse wind resistance, the mechanical property of a rubber support for coping with horizontal shearing is insufficient is solved. The device comprises a top plate, a bottom plate and an elastic assembly, the lower end of the top plate is arranged at the upper end of the elastic assembly, and the lower end of the elastic assembly is arranged at the upper end of the bottom plate; the elastic assembly comprises a first elastic body, a rail piece, a second elastic body, a sliding piece and a strip-shaped piece, the lower end of the first elastic body is arranged at the upper end of the bottom plate, a first strip-shaped groove is machined in the upper end of the first elastic body, the rail piece is arranged in the first strip-shaped groove, a T-shaped sliding groove is machined in the upper end of the rail piece, and the sliding piece is slidably arranged in the T-shaped sliding groove; the sliding piece is arranged at the lower end of the strip-shaped piece, the upper end of the second elastic body is arranged at the lower end of the top plate, a second strip-shaped groove is machined in the lower end of the second elastic body, the strip-shaped piece is arranged in the second strip-shaped groove, and a plurality of first elastic rods are arranged between the first elastic body and the second elastic body in a penetrating mode.

This invention relates to the field of packaging box waste recycling technology, specifically to a packaging box production waste recycling device, including a fixed frame, and a shearing box connected between the feeding box and the discharging box. Inside the shearing box, there are two parallel rotating shafts, and four connecting frames are evenly fixedly connected axially on each rotating shaft, arranged in an alternating pattern on a single rotating shaft. Two cutters are symmetrically installed on each connecting frame, and the connecting frames on the two rotating shafts are spatially staggered. One end of each rotating shaft extends out of the shearing box and is fixedly installed with a gear. The two gears mesh with each other. By setting reciprocating cutters in the transition box, the waste is pre-cut in the height direction, and then horizontally sheared in the main shearing zone, which significantly improves the adaptability and crushing efficiency of large-volume waste.

A water-rich high-geostress strike-slip fault simulating test chamber includes a first chamber and a second chamber. A flexible chamber is fixedly connected between the first chamber and the second chamber; the flexible chamber includes a plurality of flexible fault connecting units; each of the flexible fault connecting units includes framework flanges, a rubber ring, and a steel plate nested in the rubber ring; the framework flanges are respectively fixed at two axial sides of the rubber ring; and two adjacent flexible fault connecting units are connected through a bolt device fixed on two adjacent framework flanges. According to the present disclosure, the flexible chamber includes a plurality of flexible fault connecting units. The framework flanges are configured to connect the plurality of flexible fault connecting units. The rubber ring is able to realize axial tensile deformation and horizontal shear deformation, as well as a sealing function under pressure.

The utility model relates to the field of material mechanical property testing equipment, in particular to a compression-shear testing machine. The compression-shear testing machine comprises a supporting platform, a bearing platform, a pressure mechanism, a shear mechanism and a cleaning mechanism. Wherein the pressure mechanism applies vertical pressure to a detected object through a pressing cylinder; the shearing mechanism applies horizontal shearing force to the detected object through a shearing cylinder; the cleaning mechanism achieves automatic cleaning of the bearing platform through a sliding cleaning scraper blade and an ash cleaning bin. In addition, a positioning mechanism and a guide mechanism are further arranged, the precise action point of the shear mechanism is ensured, and the working noise is reduced through a noise reduction shell and a sound absorption cotton layer. The testing device achieves the effects of improving the testing precision, prolonging the service life of equipment and improving the operation environment.

The utility model relates to a detachable vertical and horizontal shear upper shearing mechanism and a vertical and horizontal shearing machine thereof, and the detachable vertical and horizontal shear upper shearing mechanism comprises an upper tool apron, an upper vertical shear tool apron, a rear buckle plate and a front buckle plate; a concave tool apron mounting groove is formed in the middle of the bottom surface of the upper tool apron; a front bottom plate is fixed on the front side of the tool apron mounting groove and at the bottom of the upper tool apron; a rear catching groove is formed in the rear side of the tool apron mounting groove; the upper longitudinal shear base is detachably mounted in the middle of the bottom of the upper cutter base; the front side of the cutter holder mounting surface of the upper longitudinal shear holder protrudes to form a front buckling block; the rear side of the tool apron mounting surface of the upper tool apron is sunken to form a rear catching groove; the upper sides and the lower sides of the inner sides of the rear buckle plate and the front buckle plate protrude inwards to form buckle strips respectively. The longitudinal and transverse shearing machine comprises a shearing machine frame, and the detachable longitudinal and transverse shearing upper shearing mechanism capable of vertically ascending and descending is arranged on the upper portion of the shearing machine frame. The rear pinch plate and the front pinch plate are used for fastening and fixing, so that the mounting reliability of the upper longitudinal shear seat is improved.

The invention discloses leveling and grinding equipment for transverse shear machining and relates to the technical field of grinding, a plurality of limiting grooves are formed in transverse shears, the leveling and grinding equipment comprises a machine body, a driving device, a clamping device, a cooling device and a grinding wheel, the driving device comprises an angle changing assembly, the angle changing assembly comprises a guide rail and a mounting base, and the mounting base is in sliding connection with the guide rail; and the mounting seat is in transmission connection with the transverse scissors through the clamping device. By arranging the variable-angle assembly, during grinding, the moving direction of the transverse scissors is in an arc-shaped state, that is, during cutting edge grinding in a certain width interval, a to-be-ground area rotates along an arc shape to form a virtual circle, the circle is a grinding path, and a grinding wheel and the grinding path are internally tangent; the included angle between the outer circle of the grinding wheel and the grinding path is smaller than the included angle between the grinding wheel and the tangent position, in the grinding process, grinding is gradually conducted from the outer portion to the inner side of the cutting edge protrusion, direct grinding on the inner side of the protrusion is avoided, and the surface precision is improved.

This invention discloses a three-dimensional backfilling system and method for pipe gallery trenches based on earthworm-inspired peristaltic shear-axial compaction coupling and artificial intelligence closed-loop control. The system includes an earthworm-inspired peristaltic shear vibration compaction unit, an axial compaction pulse unit, boundary fitting and guiding constraint components, a multimodal sensing unit, and a digital twin and artificial intelligence control unit. The peristaltic unit adopts a segmented sleeve structure, generating a directional horizontal shear wave field for initial compaction within the narrow trench through a peristaltic sequence of "anchoring phase-shear phase-propulsion phase"; the axial unit applies adjustable compaction pulses vertically for intensified compaction. The multimodal sensing unit collects soil state data in real time, and the AI ​​control unit constructs a digital twin model, employing a reinforcement learning and graphical model collaborative control strategy to optimize compaction parameters online. This invention achieves directional energy transfer and adaptive pore pressure control within a narrow space, significantly improving backfill density and uniformity, and is suitable for high groundwater conditions.

This invention proposes a pressure-adjustable wire shearing experimental fixture and its shearing method, comprising a base unit, a wire feeding unit, a cutting unit, a top-loading unit, and a clamping unit movably mounted above. The clamping unit is equipped with a cutting drive structure and a top-loading drive structure. During a single downward stroke of the clamping unit, the vertical drive sequentially triggers the horizontal shearing action of the cutting unit and the ejection of the material section by the top-loading unit. The wire feeding unit is equipped with a pressure adjustment mechanism, which can preset the clamping force on the wire and adjust the rapid clamping or releasing of the wire. This invention enables the quantitative adjustment and control of key process parameters such as clamping force, shearing gap, and material section length during the wire shearing process, thereby obtaining the optimal shearing parameters under different working conditions through experiments. It solves the problem that existing production equipment cannot conduct multi-parameter shearing mechanism research, and has the advantages of compact structure, precise action timing, and reliable experimental data.