257 results about "Stressed state" patented technology

The invention relates to the technical field of steel reinforced concrete vibration testing, and discloses a method and system for testing the vibration performance of a steel reinforced concrete frame structure, and the state of the steel reinforced concrete frame structure is judged through vibration amplitude and frequency changes under the conditions of different excitation modes, measurement point positions, sampling frequencies, collection durations and the like. By accurately measuring and analyzing the change of the damping ratio, potential damage or performance change of the structure can be found in time, and a powerful basis is provided for safety assessment and maintenance of the structure; the signal is decomposed and analyzed based on Hilbert-Huang transform, the internal composition and the change rule of the structure vibration signal can be analyzed more finely, and the method has advantages for identifying weak vibration characteristics and early damage signs of the structure in a complex stress state, so that the test structure can be evaluated in time in the early damage stage, and the test accuracy is improved. And therefore, coping treatment can be conveniently carried out.

The invention relates to a construction method of a sectional type universal potential sliding surface model, and belongs to the field of traffic slope engineering. According to the method, different shear failure mechanisms and different shear failure characteristics of rock-soil bodies at different parts due to different stress states of all parts of the slope are considered, a three-section type universal potential sliding surface is adopted to simulate the complex failure form of the slope, and the constructed sectional type universal potential sliding surface comprises the possible type of the existing sliding surface and the possible type of the existing sliding surface; the reasonability of the shape of the sliding surface can be ensured under the condition that the concave characteristic of the curve of the sliding surface and the consistency of the motion directions of the connecting points of the adjacent sections of sliding surfaces are required, and the shape of the sectional type universal potential sliding surface can be controlled by a plurality of easily determined parameters simply and conveniently and is generated in a discrete mode; therefore, multiple advantages of universality, accuracy, usability and the like of potential sliding surface determination in actual slope engineering under complex conditions are taken into consideration, and the accuracy of slope stability evaluation is further improved.

The invention relates to a stress analysis method and system based on a small and medium span bridge steel-concrete composite structure, and belongs to the technical field of stress analysis, and the method comprises the following steps: S1, building a finite element parameterized model of a steel-concrete composite bridge; s2, constructing a slippage effect model of a steel-concrete interface based on the constitutive relationship of the steel-concrete composite bridge; s3, applying a moving load working condition, and dividing a load position of the steel-concrete composite bridge through a dynamic grid; s4, solving and correcting the structural stress of the steel-concrete composite bridge; s5, key section stress distribution of the steel-concrete composite bridge is output so as to identify the maximum tension and compression stress area; the method has the beneficial effects that the dynamic change of the load action can be accurately reflected in the model so as to reflect the stress state of the bridge under the actual traffic load; and an accurate structural stress solution is gradually approximated, and a reliable stress analysis result is obtained by comprehensively considering material characteristics, structural geometrical shapes and load distribution factors.

The invention provides a fatigue performance evaluation method and system for a U rib of an orthotropic steel bridge deck slab, and relates to the technical field of U rib fatigue performance evaluation, and the method comprises the steps: constructing a U rib model, setting a load and environmental parameter working condition combination, simulating residual stress evolution, and screening out main control parameters; a residual stress change coefficient theoretical equation is constructed, and a final formula is obtained through processing; the main control parameters are combined, the welding process without cyclic load is simulated, and initial values of the characteristic parameters are extracted; finding out the most unfavorable combination, simulating stress evolution under the action of the most unfavorable combination, extracting a final value, comparing the final value with an initial value to obtain a variable quantity, generating a fatigue comprehensive index, and comparing the fatigue comprehensive index with a preset threshold value to evaluate the fatigue performance of the U rib. The method disclosed by the invention reveals a core mechanism that residual stress, load and environmental factors cooperatively change the stress state of the U rib, provides a solid theoretical support for evaluation of the fatigue performance of the U rib, accurately quantifies the influence of main control parameters on the fatigue performance of the U rib, and remarkably improves the evaluation result of the fatigue performance.

The invention provides a vertical shaft type shield segment prototype loading test device and test method, and relates to the technical field of shield tunnel engineering, the test device comprises a support supporting body and a reaction frame body, and the reaction frame body is provided with a radial loading assembly, a hoop loading assembly and a hoisting loading assembly; the test ring pipe piece is vertically placed, equivalent bending moment is applied in a graded mode through the radial loading assembly, equivalent axial force is applied in a graded mode through the hoop loading assembly, and lifting acting force is applied in a graded mode through the hoisting loading assembly so as to achieve self-weight balance. Compared with a flat-lying type test in the prior art, the test device is used for a standing type segment prototype loading test, and the actual stress state of a segment is simulated more truly; besides, dead-weight balance is realized by hoisting the loading assembly, the dead-weight counter-force effect of the duct piece provided by the stratum in the actual working condition can be accurately simulated, the problem of dead-weight counter-force concentration in the standing type duct piece prototype loading test is solved, and the actual stress state of the duct piece is simulated more truly.

The invention discloses a testing device for a three-dimensional initial stress distribution state of a concrete filled steel tube arch rib, and relates to the technical field of structural engineering tests. Comprising a base, hinge seats are arranged at the two ends of the upper surface of the base and connected with the two ends of a rotating part respectively, a limiter is connected to the base, and the rotating part is connected with the limiter through a connecting piece; one side of the rotating part is connected with a clamping device; the loading component is used for applying a load to the concrete filled steel tube. The method comprises the following steps: acquiring three-dimensional stress data of a test piece at a certain inclination angle through an inclination sensor and a strain gauge before the strength of concrete is formed; the whole test device is detachable, the angle can be adjusted, the height and the diameter of a test piece can be changed, the construction initial stress can be truly simulated through simple operation, and compared with an existing test device which only applies axial initial stress through a screw, the three-way initial stress caused during construction can be truly simulated, and the three-way stress state of the test piece can be researched.

The invention relates to the technical field of bridge construction, and discloses a method for calculating the rigidity of a composite beam connected by high-strength bolts, which comprises the following steps of: considering the most unfavorable load possibly occurring in a normal use stage and a construction stage during calculation, calculating a standard value of the most unfavorable load combination on the composite beam, and setting a mid-span displacement judgment value at the same time. The method analyzes the stress state of the steel-concrete interface under the action of various loads, can accurately capture the critical point of interface shear stress and friction failure, can accurately simulate the nonlinear change rule of the equivalent stiffness of the composite beam along with the loads by adopting different stiffness calculation formulas, and meanwhile, the design method systematically considers multiple influence factors, and the design method is simple and convenient. According to the method, the nonlinear mechanism of a bolt connection area is simulated, a relatively accurate displacement value can be given, economic evaluation is considered, and the method is a relatively comprehensive composite beam design analysis method.

The invention provides a topological optimization method for a tension / compression structure. The method is based on a three-phase material model formed by pure tension, pure compression and empty attribute materials. According to the method, the discrete design domain of the mixed stress unit is adopted, the unit tension / pressure state judgment criterion based on the principal stress value and the tension / pressure tolerance is formulated, the tension / pressure state of the unit can be more accurately determined, and therefore material distribution based on the unit stress state is achieved. And finally, deriving the sensitivity of the target function to the design variable, and filtering the sensitivity by using a three-field filtering technology.

The invention belongs to the technical field of highway bridge and culvert engineering, and discloses a multi-span hole assembly type cover plate small bridge and culvert structure construction method which is characterized in that side walls, middle walls and cover plates are transported to a construction site to be assembled after being prefabricated, so that site formwork erecting work is effectively reduced, the construction process is simplified, and the construction efficiency is improved; the connection strength and the structural stability are improved through a grouting method, and then the problem of insufficient grouting of a bedding method is further solved through a secondary grouting method; the pre-embedded steel bar groups of the adjacent cover plates are welded and connected, and by utilizing an equivalent load preloading pre-deformation method in advance, cast-in-place connection areas can bear more uniform stress distribution after being fixedly connected, the stress state in the service stage tends to be more balanced, the crack initiation risk is reduced, and the overall stability and durability of the structure are improved; rigid connection is formed between the adjacent cover plates and the middle wall, the risks of cover plate damage, slab staggering and reflection cracks caused by displacement or looseness of the abutted seam are reduced, and the structural safety and the service life of the bridge and culvert are guaranteed.

The invention discloses a method and system for calculating the longitudinal torsional rigidity effective rate of a rectangular pipe-jacking tunnel under combined acting force and a storage medium. The method comprises the following steps that S1, the bending-pressing-twisting combined acting force on a calculation unit of the rectangular pipe-jacking tunnel is obtained according to the stress condition of the rectangular pipe-jacking tunnel; s2, the stress state of the pipe jacking lining structure is judged according to the relation between the bending moment and the axial force, and the stress state of the structure is divided into two different conditions according to the position of a neutral axis; s3, for different stress states, according to deformation coordination conditions and mechanical equilibrium conditions, calculating the distance between a neutral axle on the section and the center of the section; s4, according to the torque balance condition and further according to the two different conditions, the position of the torsion center and the anti-friction torque generated by the concrete in the pressed area are calculated; and S5, calculating a joint torsion angle and equivalent torsional rigidity, and further calculating the effective rate of the torsional rigidity. The longitudinal torsional rigidity effective rate of the rectangular pipe-jacking tunnel under the bending, pressing and twisting combined acting force can be rapidly and accurately obtained, and a basis is provided for structural safety analysis of the rectangular pipe-jacking tunnel.

The invention belongs to the technical field of bridge cranes, and provides a bridge crane metal structure fatigue life evaluation method, which comprises the following steps: establishing a bridge crane simulation model through finite element software ANSYS according to a bridge crane structure, and respectively carrying out concentrated analysis on stress under a static working condition and a dynamic working condition to obtain the fatigue life of a bridge crane metal structure. The method comprises the following steps: determining a dangerous stress area, carrying out dominant analysis on stress components of the dangerous stress area under a static condition from a spatial distribution dimension of the stress components, and monitoring a uniaxial stress state of the dangerous stress area under the static condition. Deviation analysis is carried out through the multi-axis stress damage value of the dangerous stress area at the single-multi-axis change time point, the single-axis evaluation error is eliminated through multi-axis stress equivalent correction, and it is ensured that the fatigue life evaluation result is highly consistent with the actual stress damage rule of the structure.

The invention discloses a performance-based fire-resistant design method for a cable system of a large-span suspension bridge. The method comprises the steps of bridge fire-resistant category division, fire intensity division, fire-resistant target determination, adverse fire scene determination, fire response calculation, fire-resistant checking calculation, fire-resistant protection and the like. The bridge fire-resistant category, the fire intensity, the fire-resistant performance and the fire-resistant target are all divided into three levels. The adverse fire scene is determined based on the fire type, fire combustion mode, fire position, wind speed and wind direction influence and combined with the structure stress state; fire response is calculated through thermal-mechanical coupling by adopting a finite element method; the fire-resistant checking calculation can adopt a design method based on overall structure fire-resistant checking calculation or component fire-resistant checking calculation; and when the fire-resistant checking calculation of each component of the cable system does not meet the fire-resistant target, fire-resistant protection design is carried out, and a fire-resistant protection scheme is designed by combining tests and numerical simulation. The fire-resistant design method based on the performance of the suspension bridge cable system is constructed, and reference can be provided for fire-resistant design of the suspension bridge.

The invention provides constructional engineering template supporting strength detection equipment, which is applied to the technical field of constructional engineering template strength detection, and is characterized in that a bearing plate provided with a plurality of uniformly distributed threaded holes is fixedly mounted at the top of a base; a pouring mold formed by assembling a plurality of constructional engineering formworks can be fixedly installed on the bearing plate, then the first rod frame capable of rotating and swinging is installed in the shaft seat through the disc frame, and under connection of the second rod frame, the first rod frame can rotate and swing. The pushing force of the hydraulic push rod on the lower portion can act on the building engineering formwork from inside to outside in the narrow space in the pouring mold through the sleeve according to the lever principle, the stress state of the building engineering formwork in actual use is simulated, and then deformation of the stressed building engineering formwork and the pouring mold is observed and detected. Detection of the supporting strength of the constructional engineering formwork is achieved, detection is carried out in a simulation environment, and the detection accuracy can be effectively improved.

The utility model relates to the technical field of building equipment, and discloses a prestressed concrete laminated slab of a steel bar truss, which comprises a steel bar truss composed of steel bars, a prefabricated bottom plate and a grouting steel pipe, the steel bar at one end of the steel bar truss extends out of the prefabricated bottom plate and is provided with an adjusting component, and the grouting steel pipe is provided with a grouting hole. The grouting steel pipe is sleeved with the adjusting assembly. The height of the grouting steel pipe is adjustable, the rigidity of the laminated slab can be adjusted according to actual requirements, different application scenes and structure requirements often have different requirements for the rigidity of the laminated slab, the height-adjustable grouting steel pipe enables the laminated slab to better adapt to various conditions, and optimal adjustment of the rigidity is achieved; the overall rigidity and stress distribution of the laminated slab can be adjusted by adjusting the height of the grouting steel pipe, so that the laminated slab can reach a better stress state when bearing loads, the stress concentration and deformation risks are reduced, and the stability and safety of the whole structure are improved.

The invention discloses a method for predicting high-temperature and complex stress of a ceramic-based composite material based on strain control damage evolution, and belongs to the technical field of stress prediction of ceramic-based composite materials. The method comprises the following steps: determining material high-temperature performance degradation conditions according to temperature; the total strain (mechanical strain and thermal strain) of the material is calculated, and then based on a three-dimensional failure criterion of strain control, six damage initial criterion equations including stretching and compression in the warp direction, the weft direction and the out-of-plane direction are constructed; establishing an evolution model of damage coefficients by introducing a coupling mechanism of damage factors in different directions; combining a multi-linear constitutive relation of the ceramic matrix composite material to construct a rigidity degradation matrix, and realizing rigidity adjustment of the failure unit; and finally deducing a stress-strain relation equation to complete stress prediction of the material under the conditions of high temperature and complex load. The prediction method provided by the invention can accurately predict the complex stress state of the ceramic matrix composite material under the combined action of the high temperature and the mechanical load.

The invention relates to the technical field of electric power engineering structure failure assessment, and discloses a reinforced concrete pole icing failure assessment method, system, device and medium, and the method comprises the steps: collecting the initial data of a pole, and assessing the stress distribution and potential crack position of the pole under a specific load based on the data. According to the stress distribution and the crack position, the expansion condition of the concrete crack is determined, and the stress state of the steel bar is analyzed. And based on the stress state, executing preliminary judgment. And establishing a relation model of the critical fracture value and the critical load of the steel bar in combination with the preliminary judgment result, and calculating the probability of overall failure of the electric pole. By analyzing the stress distribution and potential cracks of the electric pole under different loads, the actual stress state of the electric pole can be accurately predicted. Through fitting the joint distribution of the preset loads, the interaction between the loads is considered, and the evaluation precision is improved. The established relation model provides a basis for electric pole failure probability evaluation based on a preliminary judgment result.

The invention discloses a bidirectional spring pressure balance detection method and system, and relates to the technical field of balance testing, and the method comprises the steps: obtaining a bidirectional spring pressure test table, and deploying a bidirectional spring test device; controlling the bidirectional loading mechanism to acquire a spring loading test data flow through the sensor array according to the bidirectional spring pressure test meter; testing for multiple times to obtain a spring pressure balance detection data set; and performing multi-dimensional evaluation on the spring pressure balance detection data set based on a spring balance performance evaluation standard, and determining a bidirectional spring pressure balance performance detection result. The technical problems that the performance of the two-way spring in the two-way stress state cannot be comprehensively evaluated and the pressure balance performance detection precision is insufficient due to the fact that the pressure change of the two-way spring in the forward and reverse loading process is difficult to accurately monitor in real time in the existing spring pressure balance detection process are solved. The technical effect of improving the accuracy and reliability of the detection result of the pressure balance performance of the bidirectional spring is achieved.

The invention discloses a mining wheel ventilation area optimal value determination method and an overall strength evaluation method thereof. The mine car wheel lacks a processing method and a quantitative standard for correspondingly and accurately evaluating the overall structural strength of the wheel in different use stages; the method for determining the optimal value of the ventilation area of the mining wheel comprises the following steps of: establishing an initial mining wheel model according to standard bending moment data and standard radial load data; the method comprises the following steps of: performing stress field analysis and fatigue life evaluation on radial and bending working conditions of an initial mining wheel model by combining a finite element model and a method for evaluating the fatigue life of the wheel to obtain actual stress states and maximum load cycle index values of the wheel under different working conditions; and obtaining the optimal value of the wheel ventilation area through topological optimization according to the actual stress states of the wheel under different working conditions and the maximum number of cycles of the load.

The invention discloses a gradient combination anti-crack diaphragm wall concrete self-constraint stress optimization design method. The method comprises the following steps: firstly, constructing a BIM three-dimensional structure model comprising material performance, temperature gradient and stress state through three-dimensional laser scanning and core sample detection; then, carrying out stress partitioning based on the model, and calculating a self-constraint stress value and a stress transfer attenuation coefficient of each partition; then establishing an expanding agent proportion optimization model, simulating stress redistribution under different doping amount gradients by adopting a finite element algorithm, and screening a minimum effective doping amount meeting a stress homogenization index; and after the anti-cracking effect is verified through dynamic simulation, a final matching scheme is output. According to the method, the BIM technology and the material gradient design are combined, precise control over the concrete self-constraint stress of the underground diaphragm wall and active optimization of the crack resistance are achieved, the technical problem that traditional homogeneous material design is difficult to adapt to complex stress distribution is solved, and the durability and safety of the underground diaphragm wall structure are remarkably improved.

The present invention discloses a stress detection method and system for a high pier bridge support structure, which relates to the technical field of stress detection of bridge support structures. The stress detection method for a high pier bridge support structure respectively obtains support state data for each bridge support column in the high pier bridge support structure, analyzes the initial stress index and performs correction processing to obtain the stress comprehensive correction index of the high pier bridge support structure, and makes a judgment and analysis with a preset stress evaluation interval. The present invention dynamically corrects by obtaining the real-time data of each support column and combining various environmental factors. The initial stress index of the support column will be corrected according to the changes in local displacement, local strain and load after each monitoring, ensuring the real-time and accuracy of stress evaluation. This precise correction mechanism can analyze the different stress states of each support column and timely reflect the dynamic changes of the structure.

The invention relates to a tunnel single-layer lining embedded grating steel frame structure and a construction method thereof, and belongs to the technical field of highway engineering. The structure is composed of a primary support, a film spraying waterproof layer, a secondary lining and embedded grating steel frames, the embedded grating steel frames are embedded into the primary support and the secondary lining respectively, the effects of transmitting shear stress and coordinating deformation are achieved, the primary support and the secondary lining form a combined beam stress state, and the overall rigidity and bearing capacity of the lining structure are remarkably improved. During construction, the arrangement distance of the grating steel frames is determined through theoretical calculation, and it is ensured that the anti-shearing requirement is met. The method has the advantages of being convenient and fast to construct, high in safety and good in economical efficiency, the lining thickness and the number of reinforcing bars can be effectively reduced, the engineering cost is reduced, meanwhile, the method adapts to tunnel engineering of different surrounding rock grades, the problem that in traditional single-layer lining, shearing force transmission between a primary support and a secondary lining is insufficient is solved, an innovative solution is provided for tunnel lining structure design, and the method is worthy of popularization and application. The method has important engineering application value and popularization prospect.

The invention provides a concrete normal section reinforcement design method and system, electronic equipment and a storage medium. The method comprises the following steps: establishing a section stress model containing multi-layer reinforcement strain distribution based on plane section assumption; the stress state of the whole process of the section from axle center compression to axle center tension is simulated by setting strain proportion parameters of the strain of the outermost reinforcing steel bar on the tension side and the limit pressure strain of the concrete; aiming at a plurality of set strain state control points, calculating stress of each steel bar layer position, contribution of the stress to axial force and bending moment and contribution of the stress to a concrete compression area; and based on the section static balance condition, the optimal reinforcement area meeting the design load requirement is determined through iterative calculation, and the configuration constraint of multiple layers of steel bars is considered in the iterative calculation. The method overcomes the defects that a traditional method overestimates the effect of the pressed steel bars and ignores the strain difference of multiple layers of steel bars, and the accuracy and safety of reinforcement design of high-performance concrete structures such as nuclear islands are remarkably improved.

The invention discloses a method and a device for determining assembly fastening force of a bolt joint part, and relates to the technical field of intelligent manufacturing. The method comprises the steps that three-dimensional point cloud measurement data of a target joint surface are acquired, and the three-dimensional point cloud measurement data comprise geometric distribution error data and / or position error data; generating a target digital twin model according to the target three-dimensional point cloud measurement data; according to the target digital twin model, stress states of a target joint part corresponding to the target joint surface are simulated, and the stress states comprise a static stress state and / or a dynamic stress state; and according to the stress state simulation information, determining a target assembly fastening force of the target joint part. According to the method, the manual dependence degree in the bolt joint part assembling fastening force determination process can be reduced, so that the labor cost in the bolt joint part assembling fastening force determination process is reduced, and the determination precision and the determination efficiency of the bolt joint part assembling fastening force can be improved.

The invention discloses a device and a method for completely transmitting a newly-added load of an existing building to an anchor rod pile, and the breakthrough technical effect that the newly-added load of the existing building is completely transmitted to a newly-added pile foundation bearing platform is achieved through accurate calculation, flexible isolation, accurate load underpinning and original foundation base stress recovery. It is ensured that the newly-added load is completely borne by the newly-added anchor rod piles, and distribution characteristics of the newly-added load are accurately calculated by establishing a building structure-foundation-foundation collaborative stress model; the flexible isolation layer is innovatively designed, and the transmission path of the newly-added load to the original foundation is effectively cut off; and a vertical deformation barostat is researched and developed, plastic deformation of the vertical deformation barostat is utilized, then the newly-added anchor rod pile is always in a preset stress state after being loaded, and the stability of the stress state of an original foundation in the load transfer process is ensured. The method is suitable for the working condition that the bearing capacity of the base is insufficient due to storey adding, functional transformation and the like of the existing building, the reinforcement cost can be reduced by about 35%, the construction period can be shortened by about 40%, remarkable economic and social benefits are achieved, and a brand new technical path is provided for foundation reinforcement of the existing building.

According to the inner cavity formwork type inhaul cable anchoring system and the installation method thereof, more horizontal force and unbalanced force are borne through the multiple separated steel anchor box sections, vertical force is transmitted to the concrete tower wall, the mechanical characteristics of steel and concrete materials are fully considered, the tensile strength of a main tensile plate of the steel anchor box sections is exerted, and the tensile strength of the main tensile plate of the steel anchor box sections is improved. And meanwhile, a tower cable anchoring area is optimized into a steel tooth block and annular steel anchor box structure by utilizing an anti-pulling and non-shearing force transmission key, a traditional force transmission key and a rubber pad. According to the invention, the stress state of the tower wall can be effectively improved, the thickness of the tower wall is reduced, tower wall circumferential prestressed steel beams do not need to be arranged, meanwhile, the inner side size of the bridge tower is relatively regular, the construction is relatively convenient, the quality is easy to guarantee, the bridge tower can be used as a tower column inner film, the later welding construction is also convenient by arranging the steel tooth block structure, and the use and popularization values are relatively high.

The present application relates to the technical field of structural engineering and discloses a limited-slippage connecting structure and a construction method of the connecting structure. The limited-slippage connecting structure comprises a prefabricated plate, a concrete plate, a welding nail and a flexible sleeve. The concrete plate is arranged on the prefabricated plate, the welding nail is located in the concrete plate, the welding nail comprises a nail column and a nail head arranged at one end of the nail column, the other end of the nail column is connected with the prefabricated plate, and the flexible sleeve is sleeved on the nail column. The limited-slippage connecting structure can provide a proper slippage amount, effectively reduce the tensile stress of the concrete plate, and improve the long-term performance and durability of the concrete plate. At the same time, the limited-slippage connecting structure also has an anti-lifting effect to resist the separation and lifting of the concrete plate, reduce the sudden increase of the partial segment shear force caused by the excessive release of the combined effect, and improve the stress state of the transition section concrete plate.

The utility model relates to the technical field of geotechnical engineering and railway construction, and particularly discloses a vibration reduction and deformation resistance steel sheet pile for deep foundation pit engineering close to an existing railway line, which comprises a steel sheet pile, a vertical load-bearing steel bar, a connecting component, a vibration isolation and reduction interlayer and a protective steel plate. By adopting a composite structure form of steel sheet piles, vibration isolation and reduction interlayers and vertical load-bearing steel bars, the structure reinforcing function and the vibration isolation function are organically combined, and a brand-new supporting structure system is formed; the vertical stressed steel bars are matched with the vibration isolation and reduction interlayer and the damping spring shock absorbers, the vertical stressed steel bars mainly share tensile stress to improve the stress state, the vibration isolation and reduction interlayer mainly absorbs vibration energy to weaken vibration transmission, and the comprehensive performance of the steel sheet pile is remarkably improved through the combined action of the vibration isolation and reduction interlayer and the damping spring shock absorbers; meanwhile, according to the scheme, by optimizing arrangement of the vertical load-bearing steel bars, selection of vibration isolation and reduction materials and arrangement of connecting components, the whole structure has the good reinforcing effect and vibration reduction performance, and construction convenience and economical efficiency are taken into consideration.

The invention relates to the technical field of steel structure engineering construction, in particular to a super-long independent steel column segmented locking type temporary stabilizing device and a construction method thereof, and is suitable for the overall lifting stage of a multi-layer aerial corridor. The device comprises a first locking assembly surrounding a concrete column and providing an X-direction lateral fulcrum; the second locking assembly is fixedly connected to the surface of the steel column to form a force transmission interface; and the connecting conversion assembly connects the steel column and the concrete column into a whole, so that the X-direction load of the steel column is transmitted to the concrete column in sections. The super-long steel columns are temporarily decomposed into short column stress sections with the length not larger than the designed length, and lateral displacement is remarkably restrained. The construction method comprises the steps that the device is installed at the corridor joint, pre-tightening force is synchronously applied, displacement is monitored in real time, overall dismantling is conducted after lifting is completed, and no residue exists after dismantling. The method is not pre-buried and fully recycled, super-long columns are restored to be in a short column stress state, lateral displacement is reduced, steel is saved, the construction period is shortened, green construction and appearance completeness are both considered, and the method is suitable for a large-span corridor overall lifting project.

The present invention provides a test device, including a bracket, on which a first test seat and a second test seat are arranged. A first test piece to be tested is arranged in the first test seat, and a punching operation can be performed on the first test piece to be tested in the first test seat through a punching device. A second test piece to be tested is arranged in the second test seat, and a punching operation can be performed on the second test piece to be tested in the second test seat through the punching device. The first test piece to be tested can be arranged at the upper part, and the second test piece to be tested can be arranged at the side part. The first test piece to be tested can simulate a roof bolt test, and the second test piece to be tested can simulate a rib bolt test, so as to realize the real stress state of roadway anchoring, thereby ensuring that the operation of the roof bolt support, rib bolt operation and wire mesh hanging operation of the intelligent anchor support system completely simulate the working scenarios in a real roadway.

The invention discloses a rock axial tensile strength and transverse shear strength testing device which comprises a rack, a lower end axial clamp and an upper end axial clamp are arranged in the rack, and a rock sample to be tested is fixed between the lower end axial clamp and the upper end axial clamp; the lower-end axial clamp is fixedly arranged in the rack, and the upper-end axial clamp moves in the rack along the axial direction to apply axial tension to a rock sample to be tested; the rack is internally provided with at least one group of transverse pushing and pressing mechanisms, and the transverse pushing and pressing mechanisms are arranged on the side surface of a to-be-tested rock sample and apply transverse pushing force to the to-be-tested rock sample. According to the invention, the axial tensile strength and the transverse shear strength of the rock sample are tested by axially applying the tensile load and transversely applying the linear pressure load; and a research platform is provided for the mechanical strength change rule of the rock in actual engineering application under different stress state conditions.