8656 results about "Cantilever" patented technology

The invention relates to the technical field of intelligent building data processing, and provides a BIM-based bridge collision detection method, which is used for solving the problem of collision early warning lag caused by space-time dislocation of a static model and real-time monitoring data in bridge construction. A comprehensive point cloud data set with a unified space-time reference is generated through multi-source data dynamic fusion and a quantum optimization algorithm, a self-evolutionary dynamic BIM model is constructed, and digital mapping of millimeter-level precision of a construction scene is achieved. A collision risk prediction model is constructed based on causal reasoning and multi-physics field coupling, a multi-dimensional relationship among construction parameters, environment variables and structural response is associated, and a linkage effect caused by mechanical motion is predicted. According to the method, the time dimension limitation of a traditional static model is broken through, full-process closed-loop control of perception-analysis-decision-verification is formed, the real-time performance of collision early warning and the controllability of construction safety are remarkably improved, and the method is suitable for high-precision construction scenes such as complex bridge rotation and cantilever casting.

The invention relates to a tower crane operation control system based on complex scene three-dimensional real-time modeling. According to the system, a lifting hook is coarsely positioned through a lifting hook positioning and state sensing unit, a real-time position is positioned by combining a laser radar point cloud clustering algorithm with historical pose data, and visual tracking is synchronously performed by means of a tower top camera AI; converting the real-time point cloud data into a 3D voxel grid map, generating a global path by using a 3DA algorithm, and outputting a hoisting track after smooth processing and track optimization; establishing a sling-lifting hook double-pendulum dynamic model, predicting a state sequence based on a model prediction control algorithm, and adjusting a control signal through a feedforward compensation item and a feedback correction item; and the man-machine interaction and monitoring unit is used for displaying the cantilever angle, the lifting hook height and the three-dimensional map of the tower crane in real time and remotely intervening the operation state of the tower crane. According to the system, multi-source data are fused to construct a high-precision three-dimensional map, lifting hook positioning and full-view tracking are achieved, and lifting safety and trajectory tracking precision are improved through path planning and dynamics control.

The utility model provides a cantilever type magnetic drive pump, and belongs to the technical field of pumps. The technical problem that an existing cantilever type magnetic drive pump is not good enough in sealing effect is solved. A cantilever type magnetic drive pump comprises a pump shell and a motor shell, a stator assembly is fixedly installed between the pump shell and the motor shell, a rotor assembly rotating relatively is embedded in the stator assembly, an impeller is fixedly connected to the rotor assembly, the stator assembly comprises a stator shielding sleeve and a stator assembly wrapped by the stator shielding sleeve, and a concave cavity is formed in the middle of the stator shielding sleeve. The bottom of the concave cavity protrudes towards the impeller to form an installation column, a reinforcing piece is arranged in the installation column, the rotor assembly is embedded into the concave cavity and fixedly and rotatably arranged outside the installation column in a sleeving mode, the installation column penetrates through the middle of the rotor assembly, and the impeller is fixedly connected to the rotor assembly. The sealing device is good in sealing effect and stable in rotation.

The invention discloses a cavity type mixed tower fan foundation formwork construction method. Comprising the steps of cushion layer pouring, pay-off, cavity foundation slab steel bar binding, annular support system erecting, foundation lower inner formwork supporting and inner support frame body arranging, cantilever anchoring end bottom formwork frame body supporting, cantilever anchoring end bottom formwork installing, foundation upper inner formwork supporting and inner support arranging, anchor backing plate and prestressed pipe installing, steel bar binding and annular support system erecting. And a foundation outer formwork is installed. Compared with the prior art, formwork erecting is formed at a time, a foundation is integrally poured, and the overall construction quality is guaranteed; the problem of leakage caused by two-time pouring of a construction joint part is avoided, water stop steel plates are reduced, and materials are saved; the inner supporting frame bodies are radially arranged with the center of the circle and the center of the stand column as a supporting point, and structural stress is reasonable. The supporting frame body is simple in structure, neat, attractive, reasonable in stress and easy to operate, the center stand column is recycled, and construction is efficient.

The invention discloses a continuous rigid frame bridge construction monitoring method which comprises the following steps: before cantilever casting construction, arranging linear monitoring points along the longitudinal axis direction of a bridge according to the spacing of 8-12 meters, and respectively arranging stress monitoring points on a top plate and a bottom plate of the root section of each section; synchronously acquiring three-dimensional coordinate data of the linear monitoring points and real-time strain data of the stress monitoring points in the process of pouring each section in a cantilever manner; the collected linear data and stress data are input into a finite element model for collaborative analysis, and when a linear deviation value exceeds + / -5% of a designed pre-camber value and the deviation between a stress measured value and a theoretical calculation value exceeds + / -8%, an adjustment instruction is automatically generated; according to the adjusting instruction, the elevation of the front fulcrum of the hanging basket is adjusted through the hydraulic jack during construction of the next section; after initial setting of the adjusted segment concrete, linear data and stress data are collected, and the actually measured data and a finite element model prediction value are compared and verified. The method can help to guarantee the safety and durability of the continuous rigid frame bridge.

The invention relates to a marine fishery breeding work ship deep water taking device and method, the marine fishery breeding work ship deep water taking device comprises a water taking cantilever, a submersible pump, a guide roller, a rolling part and a lifting device, the water taking cantilever is connected with a ship body through a rotation pair, and the water taking cantilever can stably descend underwater and keep the accurate water taking depth; the water taking method comprises the steps that the position and angle of a water taking cantilever are adjusted through a winding and unwinding winch, a temperature sensor at the water taking cantilever end monitors the seawater temperature in real time, and when the temperature reaches a preset value, a submersible pump is started to extract deep seawater; compared with a traditional method, the device has the characteristics of compact structure, simple operation, high efficiency and reliability; the problems that underwater butt joint is difficult, a hose is prone to damage and the like are solved, and operation efficiency and safety are remarkably improved; through the connection of the flexible short pipe, the flexibility and the stability in the water taking process are ensured, and meanwhile, the labor intensity of operators is reduced; the technology can be widely applied to marine fishery breeding, especially extraction of deep cold water resources, and has remarkable energy-saving, environment-friendly and economic benefits.

The invention discloses an iron tower welding part displacement welding platform, and belongs to the technical field of welding equipment.The iron tower welding part displacement welding platform comprises a welding robot and a displacement adjusting mechanism which are arranged in adjacent positions, and a supporting mechanism used for supporting and placing an iron tower base is fixedly installed at the top of the displacement adjusting mechanism; an automatic positioning and clamping mechanism used for clamping an iron tower base is installed in the supporting mechanism, a rotary material changing platform is arranged on one side of the displacement adjusting mechanism, and an automatic lifting cantilever is further installed at the position, close to the front end, of the top of the rotary material changing platform. The automatic lifting cantilever is rotationally connected with an electromagnetic attraction suspension mechanism. According to the welding platform, the automatic positioning and clamping mechanism and the follow-up pre-adjusting mechanism are designed, so that the welding platform can automatically complete positioning and calibration and stable clamping and fixing of a welding part, manpower and material resources are saved, and meanwhile the subsequent welding precision and welding quality are guaranteed.

The invention provides a double-robot collaborative welding dynamic compensation system which is characterized by comprising two welding robots slidably mounted on two ground rails, a six-axis laser welding seam locating device is mounted on each welding robot, and a machine vision assembly is arranged in each laser welding seam locating device. A stand column cantilever used for driving the welding robot to move is installed on the ground rails in a sliding mode, a rotary table position changing machine is arranged between the two ground rails, a powder concentrator rotor is placed on the rotary table position changing machine, and a control system is electrically arranged beside the welding robot. The double robots cooperatively work through the laser distance measuring sensor and the visual assembly, rapid concentric alignment of a rotor, blade angle calibration and real-time tracking of a welding seam are achieved, high-precision positioning of the laser distance measuring instrument is combined with intelligent image processing of the visual module, the accuracy of welding path planning is remarkably improved, deviation caused by manual intervention is avoided, and the working efficiency is improved. The two robots cooperate with each other, so that the welding efficiency is improved by more than 40% compared with a single-machine system.

A method for rapid and safe construction and intelligent monitoring and controlling of continuous arch bridges, which using a single-arch rib construction method, when installing a new arch rib segment, the clasp cable is immediately extended, and then using an intelligent control cable to ensure that the pier and anchorage tower are in a balanced state. The newly installed segment is no longer in a cantilever state, and the loading on the flange is very small, resulting in a small change in the tension force for the clasp cables of the previous segments. The present invention saves more than half of the clasp cable usage, reduces the number of transverse movements of the cable crane system, and significantly shortens the construction period. The construction method which using intelligent control cables to balance the unbalance loading on the middle pier, could be applied to the construction of continuous arch bridges.

A mount comprise multiple mounting locations for mounting various accessories in relation to a mounting surface. The mount comprises a proximate mounting location configured to be mounted in relation to the mounting surface, and multiple distal mounting locations for mounting accessories in a spaced relation to the proximate mounting location. An accessory may be mounted at the proximate mounting location, while at the same time, mounting the mount to the mounting surface. The distal mounting location may be spaced apart and elevated in relation to the proximate mounting location so that a user may reach between and below the distal mounting locations. The mount may also be configured to be mounted in a cantilevered fashion in relation to the mounting surface. The mount may be provided with an interlocking feature or surface, which may be in the form of a ratcheting or indexable feature, which may permit angular adjustment of the mount at discrete positions. The mount may support a tether, which may be stowed in closed out of the way in proximity to the mount, and which may be deployed to hold an accessory in relation to an accessory mount.

A snowmobile may include an endless track, an electric powertrain operatively coupled to the endless track and a structural frame including a rear portion including a tunnel and a front portion positioned forward of the tunnel. The snowmobile may include a steering assembly and a straddle seat positioned along the longitudinal axis of the snowmobile over the endless track. The straddle seat may extend longitudinally rearward of the steering assembly. The straddle seat has a longitudinal front extent, a longitudinal rear extent, and a longitudinal mid-point. The snowmobile may include a storage support above the endless track and extending under the straddle seat of the snowmobile. The storage support may be accessible along a longitudinal direction of the snowmobile while the straddle seat is supported by a seat support and may extend longitudinally along the tunnel from a location rearward of the straddle seat to at least forward of the longitudinal mid-point of the straddle seat. The snowmobile may include a cantilevered straddle seat. The snowmobile may include a pass through storage positioned above the skis.

A cantilever type vehicle box sliding-out system comprises sliding-out box bodies, a cantilever type moving assembly, a driving device, a supporting frame and a bearing box, the sliding-out box bodies are fixed to the two sides of the bearing box, a long-strip-shaped opening is formed in the bottom of the bearing box, the sliding-out box bodies are arranged at the position of an opening of a vehicle body, and the cantilever type moving assembly is arranged on the sliding-out box bodies. The left side of the cantilever type moving assembly is fixed to the bearing box, the right side of the cantilever type moving assembly is fixed to the supporting frame, the upper side of the driving device is fixed to the bearing box, the lower side of the driving device is fixed to the supporting frame, the supporting frame is fixed to a vehicle body, and the bearing box slides back and forth at the lower end of the supporting frame through the long-strip sliding-out opening. Two-stage stretching and retracting can be achieved, the use space of the vehicle is increased, the cantilever type moving assembly, the driving device and the supporting frame are integrally arranged in the bearing box, a chassis on the lower portion of the vehicle body does not need to be disassembled, the whole sliding-out box can be fixed to an opening of the vehicle body only by fixing a bottom plate of the supporting frame to the vehicle body, and mounting and dismounting are convenient.

The invention relates to the technical field of building construction, in particular to a supporting system based on double-row steel sheet piles and grouting steel pipe piles and a construction method, the supporting system comprises inner-row steel sheet piles, outer-row steel sheet piles and steel enclosing purlins, and the inner-row steel sheet piles and the outer-row steel sheet piles comprise the inner-row steel sheet piles and the outer-row steel sheet piles; the inner-row steel sheet piles and the outer-row steel sheet piles are arranged in parallel and then are connected in a welded mode through steel enclosing purlins, and triangular steel brackets are arranged at the positions, connected with the inner-row steel sheet piles and the outer-row steel sheet piles, below the steel enclosing purlins. According to the technical scheme, the inner row steel sheet piles and the outer row steel sheet piles are connected into an overall stress system, compared with cantilever type steel sheet piles, stress is definite, deformation of the steel sheet piles is small, safety is good, the steel sheet piles are suitable for large excavation depth, influences on peripheral pipelines are avoided, and then cost is saved.

The present invention proposes an intermediate diaphragm-free, suspended formwork-free, and negative moment tooth block-free beam bridge, and a design method thereof. The beam bridge includes prefabricated main girders, a wet joint, lower structures, and pier cap transverse beams above the lower structures. The concrete deck slabs of adjacent prefabricated main girders are connected by the wet joint. The design method of the above beam bridge includes the following steps: S1, initial design of the main girders; S2, calculation of the non-uniform deflection of the main girders and the indirect transverse stress of the deck slabs; S3, calculation of the direct transverse stress of the deck slabs; S4, crack resistance verification of the deck slab; S5, optimization of bridge parameters to reduce the stress on the driving surface; S6, completion of the beam bridge design. The beam bridge and its design method effectively solve the problem that the existing intermediate diaphragm-free beam bridge is prone to longitudinal cracking at the joints, and realize the suspension tension without the wet joint suspended formwork of the deck slab and the negative bending moment tendon, and have better mechanical properties and better economic, environmental and social benefits, which can facilitate the promotion and application of such bridges in various types of highways , railways and municipal engineering.

The invention discloses a bridge fabrication machine construction full-period informatization management system based on an AI technology, and the system comprises a bridge fabrication machine global sensing subsystem which is used for collecting construction parameters in the construction operation process of a bridge fabrication machine; the edge processing subsystem is used for performing edge processing on the construction parameters acquired by the bridge fabrication machine global sensing subsystem; the digital twinning subsystem is used for establishing a digital twinning model for simulating the whole construction period of the bridge fabrication machine and synchronously mapping the construction parameters subjected to edge processing to the digital twinning model; and the safety monitoring subsystem is used for monitoring the working safety of the bridge fabrication machine based on the digital twin model. The method is used for solving the problems that in the prior art, the monitoring and analysis capacity of the construction process of the cantilever bridge fabrication machine is poor, and operation safety is not facilitated, and the purposes of informatization management of the construction process of the bridge fabrication machine and improvement of the safety and scientificity of the construction process of a continuous beam are achieved.

The invention discloses a concrete vibrating system for construction of a large cantilever bent cap, and relates to the technical field of vibrating rods, the concrete vibrating system comprises a vibrating rod and a motor, one end of the motor is fixedly provided with a connecting pipe, the connecting pipe is fixedly connected with the vibrating rod, the concrete vibrating system further comprises a fixing ring fixedly installed on the upper portion of the outer portion of the vibrating rod, and a positioning assembly arranged on the upper portion of the fixing ring and used for positioning the vibrating rod. The positioning assembly comprises a base and a handrail assembly, the handrail assembly is arranged on one side of the outer portion of the connecting pipe, the base is arranged above the fixing ring, a through groove is formed in the top of the base in a penetrating mode, movable grooves are symmetrically formed in the two sides of the top of the base in a penetrating mode, and sliding rods are slidably connected into the two movable grooves. V-shaped frames are fixedly mounted at the bottom ends of the two sliding rods; and when the vibrating rod is pulled back and forth, the vibrating rod can be prevented from being in contact with the reinforcing steel bar, the surface damage of the reinforcing steel bar is avoided, a worker can conveniently vibrate concrete, and the convenience and practicability are improved.

The invention discloses comprehensive rock drift rapid tunneling equipment and a using method thereof.According to the tunneling equipment, a drilling and anchoring integrated multifunctional drilling machine is arranged on one side of a cantilever type tunneling machine body, and a temporary supporting mechanism is arranged above an oscillation cutting part; a deep hole is formed in a to-be-crushed rock by utilizing the multifunctional drilling machine, the deep hole is further expanded and cracked by utilizing the pulsating fracturing system, the strength of a rock mass is weakened, then the rock mass is milled by adopting the oscillating cutting part, and finally, the rock mass is anchored and protected by utilizing the multifunctional drilling machine and the temporary supporting device, so that a guarantee is provided for an operation environment. According to the equipment and the technology, a traditional roadway tunneling procedure is simplified into a continuous procedure, the tunneling efficiency of roadway rock mass is greatly improved, and meanwhile the cost is saved.

The invention is suitable for the field of welding, and provides a special-shaped pipe welding device for fitness equipment production, the special-shaped pipe welding device comprises a base table plate and a butt-joint plate, the base table plate is fixedly arranged, the butt-joint plate is movably arranged, and a sliding rail mechanism is arranged at the bottom of the butt-joint plate; a welding table is arranged between the base table plate and the butt joint plate, a surrounding welding mechanism is arranged on the welding table, and a clamp mechanism is arranged at the top end of the base table plate and the top end of the butt joint plate. When the special-shaped workpiece clamping device is used, a worker pulls the pulling frame, the connecting frame and the movable block backwards through the pull ring, then two special-shaped workpieces to be treated are placed on the base table plate and the butt joint plate correspondingly, and when the worker loosens the pull ring, the pulling frame, the connecting frame and the movable block apply pressure for locking the special-shaped workpieces through the clamping spring; when the locking bolt is loosened, the angle can be changed by rotating the inner container, locking is conducted again, and the cantilever beam rod and the rubber block at the end of the cantilever beam rod can abut against the irregular side wall of the special-shaped workpiece.

The utility model discloses an undercarriage drop test stand, which comprises a vertical track support, a vertical pulley assembly is arranged on the vertical track support, the vertical pulley assembly moves up and down along the vertical track support, and a cantilever pulley track assembly is fixedly connected to the vertical pulley assembly. The cantilever pulley track assembly moves up and down along the vertical track support along with the vertical pulley assembly, a horizontal pulley assembly is connected to the cantilever pulley track assembly in a sliding mode, an undercarriage mounting base is arranged on the lower side of the horizontal pulley assembly, and the undercarriage mounting base directly faces an inclined plane base plate arranged on the ground. According to the invention, impact generated by vertical falling of the undercarriage can be simulated, horizontal displacement generated by falling contact with a slope can also be simulated, various simulation test environments are provided, and the damage degree of the undercarriage and the stability of a connection area of the undercarriage and an aircraft main body are judged according to recorded test data.

The invention discloses a mechanical arm and a humanoid robot, and relates to the technical field of robots. The mechanical arm comprises a plurality of structural parts which are sequentially connected, the adjacent structural parts rotate relatively through driving parts, and the rotating axes of the adjacent driving parts are perpendicular to each other. The driving part comprises a horizontal driving part and a vertical driving part, the rotating axis of the horizontal driving part is perpendicular to the extending direction of the mechanical arm, and the rotating axis of the vertical driving part is parallel to the extending direction of the mechanical arm. An output shaft of the horizontal driving part drives the adjacent structural parts to rotate through the single cantilever, and a first wire harness fixing structure is arranged at the tail end of the horizontal driving part. An output shaft of the vertical driving piece is connected with a first crossed roller bearing through a connecting inner shaft sleeve, and the first crossed roller bearing is installed on an outer ring of the connecting inner shaft sleeve. After being led out from the first wire harness fixing structure, the wire harness extends along the side wall of the vertical driving piece, penetrates through the inner ring connected with the inner shaft sleeve and then extends to the first wire harness fixing structure of the next horizontal driving piece.

The invention discloses a high-pier large-span extra-large bridge suspended pouring beam hanging basket construction method, and belongs to the field of bridge engineering construction.The method comprises the following steps that hanging basket rails are installed, the precision is controlled, and a hanging basket comprising a double-channel-steel main truss, a manganese steel sling, an arc-shaped flow guide plate and a honeycomb formwork is assembled; grading pre-pressing is carried out according to the specified multiple of the design load, and the pre-camber of the template is corrected by adopting a BP neural network to ensure that the finished bridge linear error meets the requirement; a mechanical-hydraulic-electrical integrated intelligent control system is deployed, and the traveling speed and synchronism of the hanging basket are controlled through double-oil-cylinder driving, a 5G digital twin platform and an edge computing technology, so that rapid alarm is realized when the load is abnormal; segmental circulation construction is carried out, and when the environment wind speed reaches a set value, a hydraulic rail clamping device is automatically locked; a model is established by using ANSYS software, and simulation verification is performed on multiple types of key working conditions to ensure that the safety coefficient of the structure meets the specification requirement. The construction precision and safety are guaranteed, and the method adapts to complex environments.

A testing device and a testing method of a composite blade tilt rotor power assembly are related. The testing method includes the following steps: installing a tilt rotor flight power assembly on a flange platform of a testing device through a connector; confirming normal operation of an external power supply, the tilt rotor flight power assembly and a data acquisition computer; starting the tilt rotor flight power assembly, and controlling a tilt motor to rotate a cantilever shaft according to a tilt angle instruction; and recording the energy consumption and the tensile forces and torques in x, y and z directions of the tilt rotor flight power assembly by the data acquisition computer in real time. The testing method has the beneficial effects that the processes of starting, starting and stopping, hovering and descending can be simulated for the composite blade tilt rotor power assembly which is a core driving component of a vertical take-off and landing type electric driving hovercar, and the flight performance of the hovercar can be tested. The testing method can also be used for cold rotation test, take-off strategy verification test, hover strategy verification test, durability test and acceleration performance test of the composite blade tilt rotor power assembly.

A low gravity simulator configured to place an object under a simulated low gravity force is disclosed. The low gravity simulator comprises: a substantially vertically extending support column, wherein the support column comprises an air bearing; a boom, wherein the boom is mounted to the support column, and wherein the boom is rotatable about a vertical axis; a carriage, the carriage translatably mounted on the boom so that the carriage is, in use, movable backwards and forwards along the boom; a cable supported by the carriage and connectable at one end, in use, to the object; and a counterweight attached to the cable at an opposing end to apply a biasing force to the cable. The counterweight is restrained by the support column and the air bearing is configured to facilitate the motion of the counterweight with respect to the support column.

To provide a prefabrication method for a layered wall that can integrate tiles and a heat insulation layer without breakage.SOLUTION: A layered wall cantilevers a tile and a mold on both sides of a core concrete layer to form a structure which has rigidity like a core tube steel structure and also allows elastic deformation, a heat insulation layer is charged between the tile and core concrete layer and connected with a precast outer support rod to be completely cast, layer by layer, without inversion, wherein the title is not broken owing to inversion, sandwiched between the heat insulation layer with elasticity and a mold for another layered wall to be securely hardly broken during warehouse storage / transportation, and also securely hardly broken in crane assembly, the heat insulation layer is sandwiched inside to be securely hardly dropped or broken, and a wind leak and a cold bridge are evaded with the precast outer support rod. On casting the core concrete layer, operations to connect with an outer support tile layer, block the cold bridge, and block convection are completed, so that the method is simple and easy to operate.SELECTED DRAWING: Figure 1

The invention relates to the field of automatic reclaimers, and particularly discloses a remote unattended control system and method for a bucket-wheel stacker-reclaimer, which utilizes a material level radar deployed at the head of a cantilever belt of the bucket-wheel stacker-reclaimer to monitor the vertical distance between the head of the belt and the surface of a coal pile in real time, and determines the position of the coal pile on the basis of the error between the actual distance and the preset distance. And the PLC is used for controlling the adjustment amount of the pitch angle of the cantilever of the bucket-wheel stacker-reclaimer. Meanwhile, in the material level radar distance measuring process, in order to improve the environmental adaptability and measurement accuracy of radar waves, environmental parameter data are further collected in real time through a multi-source sensor, a deep learning algorithm is introduced to conduct deep time sequence analysis on environmental parameters, and the radar transmitting power is intelligently adjusted based on the dynamic interaction change of the multi-source environmental parameters. In this way, dynamic compensation of radar wave propagation characteristics can be achieved, the influence of environmental factors on radar ranging precision is reduced, and therefore the automatic operation precision and safety of the bucket-wheel stacker-reclaimer are improved.

The invention relates to automobile part testing, and relates to the technical field of an automobile door limiter durability testing device, and the device comprises an adjusting mechanism which comprises a first motor, a first rotating disc, a first sliding groove, a threaded rod, a first piston rod, a first sliding block, a second rotating disc, a second sliding groove and a sliding rod. Through cooperation of structures such as the second rotating disc and the arc-shaped plate, simulation testing of the vehicle door limiter is facilitated, the first motor is started to enable the second rotating disc to rotate continuously through transmission, the arc-shaped plate drives the cantilever to swing in a reciprocating mode, and the state of the limiter during door opening and closing is simulated; the durability cycle test, the motion precision verification and the instantaneous impact load evaluation of the vehicle door limiter are realized, the test automation degree and the simulation precision are improved, the negative pressure generates variable damping force, simulates air resistance, spring pre-tightening force and door closing impact, the durability of the limiter under real stress is tested, and the test effect of the device is improved.

The invention relates to the technical field of wharf construction processing, in particular to a construction method for a front-edge double-pile bearing beam and a berthing component, according to a support building method, hoops are installed on front-edge double-row PHC piles to serve as anchoring points, cantilever beams are welded to the front edge sides of the hoops to serve as structures for supporting the berthing component, and the whole installation mode is simple, convenient and reliable; the double-layer hoops are adopted on the front-edge double-row PHC piles to serve as supports of different layers of structures, so that installation stability is guaranteed, later adjustment can be facilitated, and particularly, the installation levelness of the cantilever beam can be adjusted conveniently. In addition, the cross beams at the upper ends of the front-edge double-row PHC piles are connected through the supporting I-shaped steel oblique beams, so that the connecting stability between the front-edge double-row PHC piles and the rear-row double piles can be guaranteed, and the front-edge double-row PHC piles and the rear-row double piles are matched in different directions. The installation efficiency can be effectively improved by prefabricating the berthing component.

The glass substrate cassette with the supporting cantilever provided with the permanent magnet vibration reduction piece comprises an upper frame and a lower frame which have corresponding transverse width and depth, and a plurality of left and right outer frame columns and rear frame columns which are supported between the upper frame and the lower frame to form a containing space; the left outer frame column and the right outer frame column respectively extend towards the containing space to be provided with a plurality of short supporting rods, the rear frame column is respectively provided with a plurality of supporting cantilevers in an extending mode, the supporting cantilevers are respectively provided with a fixed end and a free end, the free end is provided with a permanent magnet vibration reduction piece, and the permanent magnet vibration reduction piece is respectively provided with an upper magnetic pole and a lower magnetic pole. And the other permanent magnet vibration reduction piece is opposite to the free end of the vertically adjacent supporting cantilevers, so that when the free end deviates from a balance position to start vibration, the permanent magnet vibration reduction pieces can be synchronously driven, combined magnetic restoring force facing the balance position is obtained from the adjacent permanent magnet vibration reduction pieces on the upper side and the lower side, and the permanent magnet vibration reduction pieces return to the balance position more quickly.

Provided herein is a ladder that includes a cantilevered step. The ladder, for example, may be a stepladder ladder having a cantilevered step disposed at one or more positions on a rail assembly, for example on the front rail assembly. In one illustrative configuration, the cantilevered step may include a first or secured portion that is disposed between a first rail and a second rail of the rail assembly. The cantilevered step may also include a second or extended portion that is cantilevered from the first portion and extends beyond the first rail and the second rail. The second or extended portion of the cantilevered step may be coupled to the first or secured portion along at least two discrete attachment surfaces.

The invention is suitable for the technical field of tunneling excavation. The invention discloses a cantilever tunneling device for controlling surrounding rock deformation, which comprises a tunneling cantilever mounted at the front end of a tunneling machine, a cutting drill bit mounted at one end, far away from the tunneling machine, of the tunneling cantilever, two longitudinal driving parts symmetrically mounted on two sides of the tunneling machine, and a longitudinal strip-shaped assembly seat detachably connected to the output end of each longitudinal driving part, a plurality of supporting type guiding mechanisms are installed between the two longitudinal strip-shaped assembling bases, a universal pipe inserting mechanism is connected between the two longitudinal strip-shaped assembling bases and located on the sides, away from the inner circumferential wall of a tunnel, of the supporting type guiding mechanisms, and an active guniting mechanism is installed on the supporting type guiding mechanism located at the foremost end of the heading machine. According to the method, the problems that the surrounding rock deforms unevenly and intrudes into the preliminary bracing limit when the cantilever tunneling machine is adopted to excavate the tunnel under the soft stratum condition are solved, the tunnel surrounding rock over-excavation and under-excavation are controlled, and normal construction of the tunnel preliminary bracing is guaranteed.