40 results about "Support condition" patented technology

The invention discloses a method for analyzing the strength stability of a composite material wallboard, which comprises the following steps of: 1) carrying out a wallboard strength test on a wallboard structure of a T-shaped stringer disconnected at a rib position to obtain test data required in the method for analyzing the strength of the wallboard; 2) performing finite element simulation on the BVID damage with the lowest residual strength in the wallboard in the same configuration and same loading mode in the wallboard strength test; 3) based on the finite element simulation in the step 2), establishing a multi-configuration wallboard finite element model; and 4) based on the multi-configuration wallboard finite element model in the step 3), fitting to obtain a correction coefficient, and determining a strength stability analysis method.According to the method, the defects of a classical wallboard strength engineering algorithm in stringer support condition simulation, layering applicability, BVID damage and initial geometric defect influence are overcome.

The present invention relates to a compression test device for a composite laminate with a large length-thickness ratio, belonging to the technical field of composite material testing. It can achieve that the two-side boundaries are kept in a simply supported constraint throughout the compression test process, and the simply supported condition is not easily changed at the moment of failure. The flatness of the loading plane on the length and width surfaces of the plate specimen is also adjusted through a grid device. The device includes: two groups of side supports are respectively arranged at both ends of the bottom installation component, and the specimen is vertically arranged between the two groups of side supports; two groups of bottom constraint plates, four simply supported constraint plates and two groups of out-of-plane adjustable grids are respectively arranged on both sides of the plate-shaped specimen, and the two groups of bottom constraint plates are respectively arranged at the bottom of the plate-shaped specimen, and the four simply supported constraint plates are respectively arranged in pairs at the left and right ends of the plate-shaped specimen; the bottom constraint plates are connected to the bottom installation component, and the simply supported constraint plates are connected to the corresponding side supports; two groups of end constraint plates are respectively arranged on both sides of the top of the plate-shaped specimen and are fixedly connected to the end loading plates arranged thereon, and the end loading plates are connected to the test loading equipment.

The invention discloses an assembly type pile structure quasi-static test system and device. The assembly type pile structure quasi-static test system comprises a model box arranged on one side of a reaction wall. The pile structure model inserted into the inner side of the model box comprises a model main body, a model seat, a left insertion column and a right insertion column which are of an integrated structure, and the left insertion column and the right insertion column are both inserted into soil on the inner side of the model box; according to the fabricated pile structure quasi-static test system and device, by designing a rotary quick connection structure between the vertical force loading cross beams of the model, the stability of the vertical force loading cross beams above is effectively improved, displacement and falling of the cross beams in the test process are avoided, stable proceeding of the test is guaranteed, and the test efficiency is improved. Meanwhile, the subsequent rapid disassembly and assembly of the vertical force loading cross beam are facilitated, and the test convenience is improved; and an auxiliary limiting structure is designed between the rubber support and the model, so that the stability of the rubber support in a test is ensured, and a reliable basic supporting condition is provided for the test.

The invention discloses a seat pressure distribution detection method and system, a seat and equipment, and the method comprises the steps: obtaining a pressure characteristic parameter of the contact between a user and the seat and a contact hot area characteristic parameter; obtaining an initial pressure distribution result of the user on the seat according to the pressure characteristic parameters of the contact between the user and the seat; according to the incidence relation between the pre-stored pressure characteristic parameters and the contact hot area characteristic parameters, the initial pressure distribution result is corrected through the contact hot area characteristic parameters, a final pressure distribution result is obtained, and the final pressure distribution result comprises the human tissue type and the pressure of the contact part of the user and the seat. With the adoption of the method and the device, the supporting condition of the seat on each part of the body of the user can be accurately known, so that reliable guidance can be brought to the supporting adjustment of the seat.

A method for determining the working resistance of a unit support in the advance section of a mining roadway includes the following steps: S1, collecting geological parameters of the overlying strata in the advance section of the roadway to be tested and determining the load on the roadway; S2, classifying the roadway into six types based on the lithology of the roadway roof, the structure of the roadway roof, whether the roadway is affected by impact, and whether the roadway is along the goaf; S3, calculating the surrounding rock load in the advance section for each of the six types of roadways; S4, calculating the roadway bearing capacity for each of the six types of roadways; S5, calculating the rated working resistance of the unit support for each of the six types of roadways. The method described in this invention comprehensively considers all possible load sources that the unit support may bear, as well as the active support provided by the roadway anchor cables, maximizing the stability of the active support system for the roadway. It can accurately calculate the working resistance of the unit support under different roadway types and support conditions, providing systematic guidance for the scientific use of the unit support throughout the entire process, ensuring that the working space is in a safe zone, and reducing safety hazards.

The utility model relates to a concrete beam column moisturizing maintenance tool which comprises a concrete beam column body, a first arc-shaped plate and a second arc-shaped plate are arranged on the outer side of the concrete beam column body, the first arc-shaped plate and the second arc-shaped plate are connected through a hinge, and clamping mechanisms are arranged in the first arc-shaped plate and the second arc-shaped plate. Moisturizing protection mechanisms are arranged at the bottoms of the first arc-shaped plate and the second arc-shaped plate. The concrete beam column has the advantages that through rotation of the threaded rod, the arc-shaped clamping plates can clamp the periphery of the concrete beam column body so that powerful supporting conditions can be provided for the moisturizing and protecting mechanism, the moisturizing and protecting mechanism is not prone to falling off in the using process, and meanwhile through arrangement of the corrugated pipe, the service life of the concrete beam column body is prolonged. The arc-shaped air bag can be protected, scratches caused by external sharp objects to the arc-shaped air bag are reduced, and the service life of the arc-shaped air bag can be prolonged.

To provide a server and a program for support that promotes use of a support tool.SOLUTION: A support system 1 includes a cheer server 100 and a supporter terminal 200 used by a user. The supporter terminal 200 receives a support operation to support a support target via an electronically displayed virtual card, generates, on the basis of the received support operation, a support request, and transmits the request to the cheer server 100. The cheer server 100 determines, in response to the received support request, whether a support condition is satisfied and returns, when it determines that the condition is satisfied, a success response to the supporter terminal 200, and grants a cheering point to the support target represented by the virtual card.SELECTED DRAWING: Figure 1

The invention provides a method for determining a coupling support of an over-forepart mining roadway, which belongs to the field of coupling support of mining roadways, and specifically comprises the following steps: acquiring rock mechanical parameters of a roadway to be detected, active support parameters of the roadway to be detected, passive support parameters of the roadway to be detected and field monitoring data; carrying out active and passive support strength coupling judgment on the front-section-exceeding roadway; determining that the safety coefficient of the active and passive combined support is within a reasonable range; determining the initial supporting force of the unit bracket; determining the deformation coupling of active and passive supports of the advanced roadway; determining that the reject ratio of the anchor rod is within a reasonable range; determining that the downward shrinkage amount of the unit support plunger does not exceed the limit; it is determined that the stable working posture of the unit support is not affected by side bulging; and the coupling support condition is observed, and finally whether the coupling support state is reached or not is determined. According to the method, a bimodal judgment mechanism of strength coupling and deformation coupling is established, a coupling regulation and control method is provided, and the strength stability and the deformation stability of the mining roadway are effectively guaranteed.

The invention discloses equipment for detecting and loading a support mesh. The equipment comprises a structural frame; the two end sides of the mounting lifting frame table are connected with the structural frame in an up-down sliding mode, and a plurality of sets of connecting hole positions are distributed in the mounting lifting frame table in an array mode; the multiple sets of net piece fixing rod pieces are detachably connected to the corresponding connecting hole positions according to the row pitch layout of the underground supporting system, and the lower ends of the multiple sets of net piece fixing rod pieces are fixedly connected with supporting net pieces to be loaded. The loading device is detachably connected to the hanging lifting frame table, and a displacement sensor and a pressure sensor are fixed to the loading moving end of the loading device; the computer control system is arranged on the outer side of the structural frame, receives and processes detection data of the displacement sensor and the pressure sensor and obtains mechanical parameters of the supporting mesh, and the computer control system controls the working state of the loading device in a linkage mode. According to the invention, the loading force test on the support mesh under different support conditions can be simulated, and workers can be assisted to comprehensively evaluate the mesh quality.

The present invention relates to a prestressed immersed tube segment, a design method and an SPMT-based barge loading method. In the prestressed immersed tube segment, transverse first prestressed steel strands are provided in a bottom plate of the prestressed immersed tube segment, such that all parts of the bottom plate can satisfy support conditions of SPMTs, and then the SPMTs can be fully distributed under the bottom plate, sufficient support force can be provided when using the SPMTs to transport the prestressed immersed tube segment and the degree of cracking of the prestressed immersed tube segment can be reduced, and therefore the SPMTs can be used to transport immersed tube segments into barges; transverse second prestressed steel strands are provided in a top plate, the second prestressed steel strands can overcome the impact of the first prestressed steel strands on the stress of the top plate, and the arrangement of the first prestressed steel strands and the second prestressed steel strands conforms to the load forms of the bottom plate and the top plate of the immersed tube segment during operation, satisfying the stress state of the immersed tube segment during operation, reducing the amount of reinforcement of the bottom plate and the top plate, and saving costs.

This disclosure relates to a method, apparatus, electronic device, and storage medium for outputting information, and pertains to the field of structural engineering technology. The method includes: acquiring relevant parameters of a rectangular plate, including dimensional parameters, elastic mechanical parameters, and load calculation parameters; determining the initial settlement at each corner point of the rectangular plate; determining first and second coefficients corresponding to each side based on the boundary conditions of each side of the rectangular plate and a pre-set set of equations corresponding to each side; determining the structural parameters of the rectangular plate based on the relevant parameters, initial settlement, and the first and second coefficients corresponding to each side; and outputting the structural parameters. Applying this disclosure allows for the calculation of the structural parameters of a rectangular plate under any support conditions, improving the accuracy of structural parameter calculation.

A numerical simulation method for a super-cantilever tree-shaped column steel structure in a construction stage is characterized by comprising the following steps: a, model establishment: establishing an analysis model by using MIDAS software, b, stress simulation: combining construction stage simulation with TEKLA deepening design, and rehearsing a hoisting splicing process through finite element software to reduce the risk of high-altitude welding deformation; the calculated length of a rod piece of the tree-shaped column needs to be adjusted according to the branch supporting condition by judging whether lateral supporting exists or not, the calculated length coefficient ranges from 1.5 to 2.0 when a treetop is not supported, and the calculated length coefficient ranges from 0.7 to 1.0 when the treetop is supported; according to the embodiment of the invention, the maximum stress ratio of the whole construction stage is 0.72 and is smaller than a strength design value 1, and the structure optimization effect is remarkable. The numerical simulation method for the construction stage of the super-cantilever tree-shaped column steel structure has the advantages that the structural design is optimized, the construction quality and safety are improved, the cost is reduced, and the building performance and attractiveness are improved.

The present application provides a staggered mining method under pre-support conditions and its application, which belongs to the field of mining methods. The staggered mining method first performs directional pre-support and high-strength grouting on the collapsed bulk along the vein roadway, so that the collapsed bulk forms a cemented combination, giving it a certain self-stabilizing ability, and creating a safe environment for the mining of the ore body next to the collapsed bulk. At the same time, by dividing the middle section of the ore body into an upper mining unit and a lower mining unit, and limiting the mining order of the two and mining and filling with a diamond-shaped stope structure, a stable inverted triangle-like structure is first formed, which provides an oblique support for the upper plate collapsed bulk, and improves the safety of the mining of the lower mining unit. Compared with the mining method in the prior art that requires reserved pillars, the mining method of the present application has a high ore recovery rate and will not cause the loss of ore resources. It solves the problems of difficulty in mining the ore body next to the collapsed bulk in existing mines, poor safety, and low recovery rate.

The present invention proposes a method and system for determining and optimizing anchor rod length based on a complex function method, relating to the technical field of tunnel construction. The method includes determining the unsupported analytical function of the tunnel under gravity; assuming the force exerted by the surrounding rock on the anchor rod as a pair of equal and opposite concentrated forces, and solving the analytical functions of the shallow tunnel soil under the equal and opposite concentrated forces without gravity; accumulating the unsupported analytical function of the tunnel under gravity and the analytical function of the shallow tunnel soil under the equal and opposite concentrated forces to obtain the analytical function of the tunnel under gravity and anchor rods; based on the analytical function of the tunnel under gravity and anchor rods, calculating the stress and displacement of the surrounding rock and the axial force of the anchor rod under anchor rod support conditions, and obtaining the optimal length of the anchor rod. The present invention uses a complex function method to calculate the adapted length of the anchor rod, calculate the axial force, elongation, and surrounding rock deformation of the anchor rod, and further determine the anchor rod design parameters.

The invention discloses an integrated external wall panel strength testing device, and relates to the technical field of integrated external wall panel strength testing. An existing testing method cannot simulate various supporting conditions, so that a testing result is disjointed with actual application, and product reliability evaluation is affected. The device comprises a supporting seat, an expansion table, a vertical frame, a motor, a screw rod, a loading arm, a pressure sensor, a loading disc and a testing assembly, the upper part of the supporting seat is connected with the expansion table, the rear side of the supporting seat is connected with the vertical frame, the upper side of the vertical frame is connected with the motor, an output shaft of the motor is connected with the screw rod, the screw rod is rotatably connected with the vertical frame, and the screw rod is in threaded connection with the loading arm. The loading arm is in sliding connection with the vertical frame, the front portion of the loading arm is connected with a pressure sensor, the lower side of the pressure sensor is connected with a loading disc, and a strength testing assembly is arranged on the supporting seat. According to the technical scheme, the stress state of the external wall panel can be simulated more truly by adjusting the supporting conditions, so that the reliability of the external wall panel under different supporting conditions is ensured, and potential safety hazards in actual engineering are reduced.

The utility model provides a box-shaped and H-shaped combined variable cross-section steel beam structure which comprises an H-shaped beam section, a transition beam section and a box-shaped beam section which are sequentially connected at equal height, the box-shaped and H-shaped combined variable-cross-section steel beam structure is suitable for engineering design with large span, two-end support conditions and design internal force differences, the box-shaped beam section meets the requirement for large bearing capacity of bending resistance and shearing resistance, and the transition beam section is used for gradually transiting the high bearing capacity of the steel beam to the low bearing capacity. The H-shaped beam section meets the condition of a support with a small section, and the steel consumption can be reduced.

The invention relates to a side wall supporting method and structure for tunnel construction, and relates to the technical field of tunnel construction. The supporting structure is composed of the base, the side plates, the supporting columns and the top plate, the structure is simple, installation is convenient, the stability and safety of the tunnel are effectively improved through attached supporting of the side plates and the side rock wall of the tunnel, the supporting positions of the side plates and the top plate can be adjusted by additionally arranging the adjusting mechanism, different tunnel supporting conditions can be conveniently coped, and the supporting effect is good. The traditional mode that a large number of prefabricated materials are needed is changed, and the supporting efficiency is improved.

This invention discloses a method for assessing the overturning resistance of gravity shoulder retaining walls for ballastless track under rock foundations, comprising the following steps: S1: obtaining embankment parameters supported by gravity retaining walls; S2: calculating the overturning stability coefficient of the retaining wall; S3: calculating the limit value of the overturning stability coefficient of the retaining wall; S4: comparing the overturning stability coefficient of the retaining wall with the limit value of the overturning stability coefficient to assess the overturning resistance of the retaining wall. This invention is beneficial for controlling the dynamic deformation of the ballastless track subgrade surface under gravity shoulder retaining wall support conditions, improving train operation conditions, ensuring the long-term stability of the subgrade under train loads, and the overturning stability coefficient of the retaining wall involved is widely used in engineering. The limit value of the overturning stability coefficient of the retaining wall is only related to the wall back inclination angle, and the assessment process is simple and convenient. It is a supplement and improvement to the construction assessment technology of gravity shoulder retaining walls for high-speed railway ballastless track subgrades under rock foundation conditions.

The invention discloses a bi-material combined type bi-stable state energy absorption cell element and an energy absorption structure. The energy absorption cell element comprises a curved beam structure, an oblique beam structure, a T-shaped supporting structure, a U-shaped supporting structure and a fixing pin. The curved beam structure and the oblique beam structure are vertically and longitudinally arranged on the upper portion of the U-shaped supporting structure, and the T-shaped supporting structure is arranged on the central axis of the curved beam structure and the central axis of the oblique beam structure and assembled and formed through fixing pins. A supporting structure prepared from resin and a beam unit prepared from thermoplastic polyurethane are combined to form a two-dimensional unit cell structure, and the requirement of the beam unit for the clamped supporting condition is met through the small supporting structure. According to the difference of buckling positions of the cant beam and the curved beam, the peak force of the curved beam and the cant beam appears in different displacement stages, so that the peak force of the structure is effectively improved, the energy absorption efficiency is improved, and meanwhile, the bistable characteristic is achieved. In addition, by replacing the oblique beams with different thicknesses, the extreme force of the cell element structure can be increased, the bistable distance is shortened, the energy absorption capacity of the structure is improved, and the practicability is high.

The invention relates to the technical field of machining centers, in particular to a lead nine-axis machining center which comprises a base, a vertical part, a horizontal part, a sawing mechanism and a machining platform. The base provides mounting and supporting conditions for the vertical part, the horizontal part, the saw cutting mechanism and the machining platform, during work, a worker places a workpiece needing to be machined on the machining platform, the workpiece is drilled through the vertical part and the horizontal part, the workpiece is cut through the saw cutting mechanism, and then the workpiece is cut through the saw cutting mechanism. The workpiece is driven by the machining platform to transversely move on the base, the machining position of the workpiece is adjusted, the workpiece does not need to be disassembled and assembled again to adjust the angle, the time for repeatedly clamping the workpiece is saved, the machining efficiency of the workpiece is improved, and therefore the problem that the efficiency is too low due to multiple procedures and multiple times of clamping is solved.

The present invention belongs to the field of comprehensive strength design and relates to a method for calculating the bending stress of an angle bar with a backing plate. The method is applicable to calculating the bending stress of the most dangerous cross-section of the angle bar under simply supported and fixed support conditions, and the backing plate and the angle bar are made of the same material. The method includes: considering the transverse shear stress generated by the friction between the backing plate and the angle bar, and based on the transverse shear stress, analyzing the strength of the backing plate and the angle bar as an integral bending structure.

The invention discloses an automatic modeling method of an electric small pipeline piping support. The method comprises the following steps of 1, obtaining electric small pipeline piping information and a standard support form; 2, the size of a pipe clamp is determined according to the piping information of the small electrical pipeline, and the support form is determined according to the distance between the piping center and the wall; 3, determining the bracket sharing condition according to the piping information and the bracket form; 4, according to the bearing capacity requirement of the supports, the distance between the supports is determined, and a support model is generated; 5, for the support form needing the embedded part, parameters of the embedded part or the rear anchoring plate are automatically determined according to the support form and the support bearing capacity, and a model of the embedded plate or the rear anchoring plate is generated; 6, constraint information of the electrical small pipeline piping support is obtained; 7, judging whether the position of the support meets the constraint information or not; and 8, completing bracket modeling. The problems of low construction efficiency and resource waste caused by different model selection and arrangement standards of the electric small pipeline piping support are solved.

The present invention relates to the field of construction monitoring technology, and in particular to a method for predicting deformation trends of deep foundation pits based on multimodal sensing data. The method comprises calculating pore water pressure differentials and predicted settlement rates to determine ground settlement conditions, detecting the actual horizontal displacement of diaphragm guide walls, and drawing a displacement curve of the diaphragm walls; determining the support conditions of internal supports based on curve diagnostic conditions, estimating the total horizontal displacement of several guide wall levels after support removal, or inspecting the loads acting on the internal supports in corresponding areas; calculating load loss to determine the reason why the horizontal displacement does not meet the curve diagnostic conditions; calculating the total horizontal displacement of the diaphragm guide walls at several guide wall levels after support removal, calculating a deformation evaluation value to determine the deformation trend of the foundation pit; and adjusting the displacement increment of the next guide wall level based on a comparison between the estimated total horizontal displacement and the actual horizontal displacement detected. The present invention determines the deformation trend of the foundation pit by calculating the deformation evaluation value of the deep foundation pit.

The present application relates to a design method for a steel-concrete joint section based on a top plate deflection constraint, comprising the following steps: equating the top plate of the steel-concrete joint section to a continuous beam supported on an elastic support, wherein the elastic support includes a stiffening rib or anchor pipe located below the top plate; determining the maximum deflection w of the equivalent continuous beam caused by the first wheel load under the elastic support condition; solving the stiffness k of the stiffening rib or anchor pipe serving as the elastic support; determining the top plate deflection constraint inequality, and solving it in conjunction with the calculation formula for the maximum deflection w of the continuous beam to determine different types of stiffening ribs or anchor pipes and their sizes, and / or transverse bridge spacing. The present application provides a design method for a steel-concrete joint section based on a top plate deflection constraint, which can quickly determine stiffening ribs or anchor pipes that both meet the prestressed steel bundle anchoring space requirements and provide sufficient stiffness support for the top plate.

To provide a method for erecting a steel rigid frame structure, which can easily construct a column base designed by selectively using column base support conditions according to the type of load.SOLUTION: An assembly of the steel rigid frame structure is completed by plumbing a steel column 1 placed on a temporary support 3 and attaching the beam members supported by the shoring, and the bolt holes in a base plate 1a are closed by welding washers 6. An anchor bolt 4 on the side where the base plate 1a rotates downward due to the rotation of the column base caused by jacking down the beam members is temporarily tightened so that a nut 4a comes into contact with the top surface of the washer 6, and the remaining anchor bolts 4 are temporarily tightened with a gap secured between them and the nut 4a so that they do not come into contact with the top surface of the washer 6 on the side where the base plate 1a rotates upward. After the beam members are jacked down and stand on their own as a frame of the steel frame structure, all of the anchor bolts 4 are finally tightened and base mortar 7 is completely filled under the base plate 1a.SELECTED DRAWING: Figure 4

This invention relates to the field of dynamic balancing testing technology, specifically to a generator dynamic balancing testing device. The generator dynamic balancing testing device is configured to perform dynamic balancing tests on the generator rotor. The device includes a test platform, a support assembly, a timing belt, and a pulley assembly. The support assembly is mounted on the test platform and configured to support the rotor's rotation. The timing belt is mounted on the test platform and forms a closed motion loop on it. The pulley assembly is mounted on the test platform and configured to enable the timing belt to form a closed motion loop. The timing belt has a fixed section that wraps around the top of the rotor during use and makes frictional contact with the rotor. Thus, when the rotor rotates, the fixed section provides external constraint to the rotor, ensuring the stable support conditions required for the dynamic balancing test and guaranteeing the accuracy of the test results.

The application relates to a portable comfortable seat, which can adjust the angle between a leaning assembly and a cushion assembly when in use, so that the leaning assembly is at a proper inclination angle, and the user is in a comfortable sitting posture; meanwhile, the angle between a headrest assembly and the leaning assembly can be adjusted to meet the headrest demand. In addition, the supporting assembly can be unfolded from the cushion assembly, so that the user's legs can be supported on the supporting assembly. The design can effectively meet the support conditions of different sitting postures of the user and improve the comfortable demand of the user in rest. When carrying, the headrest assembly can be folded on the leaning assembly; the supporting assembly and the leaning assembly are respectively folded on the cushion assembly, so that all the assemblies are concentrated on the cushion assembly; finally, the folded headrest assembly, the leaning assembly, the cushion assembly and the supporting assembly can be folded along a folding line, the volume of the portable comfortable seat is further reduced, and the carrying convenience of the seat is greatly improved.