329 results about "Vertical load" patented technology

The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, and relates to the technical field of building reinforcement. Comprising the steps of calculating the critical support stiffness of a frame column and drawing a nomogram of the critical support stiffness of the frame column, calculating the critical support stiffness of a shear type support steel frame layer of each floor, calculating the critical support cross-sectional area of the shear type support steel frame of each floor under the action of no horizontal load, and calculating the equivalent support area required for resisting the horizontal load. Calculating the critical support area of each floor frame under the action of a vertical load and a horizontal load; calculating the cross section area of a tension critical support single diagonal rod; and selecting the cross section model of a shear type support. The invention discloses a support design method of a strong support steel frame based on layer critical stiffness, provides design steps of a shear type strong support for the steel frame, and in the method, discloses a calculation formula of the structural layer critical support stiffness of the shear type support steel frame and provides a nomogram convenient for engineering application.

The embodiment of the utility model provides a five-axis tool sharpener. The five-axis tool sharpener comprises a base table, a tool rest and a tool rest, the cutting device comprises a cutting mechanism and a lifting assembly, the lifting assembly is installed on the base table and connected with the cutting mechanism, and the lifting assembly can drive the cutting mechanism to ascend and descend relative to the base table; the balance assembly is installed on the base table and connected with the lifting assembly, and the balance assembly provides driving force for the lifting assembly so as to balance the vertical load of the lifting assembly; the mechanical arm is installed on the lifting assembly and used for transferring the workpiece to be machined to the bottom side of the cutting mechanism. On one hand, the mechanical arm and the cutting mechanism are both installed on the lifting assembly, so that the mechanical arm can synchronously move along with the cutting mechanism, then feeding of the mechanical arm can be flexible, on the other hand, the balance assembly can provide driving force for the lifting assembly to balance the vertical load of the lifting assembly, and therefore the five-axis tool sharpener can balance the gravity of the main shaft.

The invention provides a coupler force calibration method and device, and the method comprises the steps: obtaining a three-point bending beam model which is used for representing a beam structure formed by the direct connection of a coupling end of a first coupler and a coupling end of a second coupler in a coupling state, and simplifying the tail part of the first coupler into a clamped constraint, the tail of the second car coupler is simplified to be clamped constraint, and the clamped constraint limits the vertical displacement and the rotation angle of the tail of the corresponding car coupler at the same time; applying a vertical load at a preset position on the first car coupler; the bearing reaction force borne by the tail of the target car coupler under the action of the vertical load is determined, so that the calibration relation between the vertical load and the bearing reaction force of the tail of the target car coupler is constructed, and the bearing reaction force of the tail of the target car coupler is the vertical force borne by the tail of the target car coupler and transmitted at the preset position on the first car coupler; the target coupler is one of the first coupler and the second coupler. According to the invention, the accuracy of vertical load transmission calculation is improved.

The invention discloses a cable laying pulley load performance test device, and belongs to the technical field of pulley performance test. The sliding rails are symmetrically arranged, the placement platform and the bottom baffle are in sliding fit, the detection assembly is located above the placement platform, the placement platform is used for bearing a tackle, the bottom baffle is used for auxiliary supporting, and the detection assembly is used for applying a vertical load. According to the pulley load performance test device for cable laying, by adjusting the relative positions of the placement platform and the bottom baffle plate on the slide rail, supporting and fixing spaces of cable pulleys with different sizes and structural forms can be flexibly adapted; the special-shaped tackle has the advantages that the special-shaped tackle is matched with the lockable sliding block and the self-centering structure, so that the technical problems that the special-shaped tackle is difficult to fix and the loading center deviates are solved, the lateral displacement or overturning of the tackle when the tackle is pressed is effectively limited, and the stability and safety of load performance detection and the accuracy of data are improved.

To provide a column structure capable of suppressing damage when receiving a horizontal load.SOLUTION: A column structure includes a column body supporting a load in a vertical direction, and a side plate attached to at least a part of a side surface of the column body and divided into two or more divided plates in a vertical direction.SELECTED DRAWING: Figure 1

The application relates to a vehicle axle steering mechanism test device, which comprises a vertical loading module of a to-be-tested vehicle axle, a steering driving module, and a torque loading module. The vertical loading module is arranged on the to-be-tested vehicle axle and is used for applying a vertical load to the to-be-tested vehicle axle. The output end of the steering driving module is connected with a steering knuckle arm of the to-be-tested vehicle axle and is used for driving the to-be-tested vehicle axle to perform a steering action. The torque loading module is respectively connected with two wheel edge output ends of the to-be-tested vehicle axle and comprises a universal connecting unit and a torque loading unit. The universal connecting unit is used for providing multi-degree-of-freedom constraint. The torque loading unit is used for loading torque. The application innovatively constructs a highly integrated, multi-axis linkage comprehensive test bench. The modules can effectively simulate the actual stress of the vehicle axle when the vehicle turns or goes uphill during testing through mutual cooperation, effectively solve the problem that the existing test bench has single function and cannot simulate a composite working condition, improve the efficiency and convenience of performance and durability testing, and fill the industry gap.

The application relates to an intelligent isolation bearing online monitoring system, an installation process and a monitoring method. The system integrates force value, angular acceleration and displacement monitoring functions on the basis of an isolation bearing, is composed of an upper sealing plate, a rubber body, a lower sealing plate and a monitoring system, is used for simultaneously monitoring vertical loads transmitted from an upper building to a lower foundation and angular acceleration and horizontal displacement of the isolation bearing, and is composed of a ring-shaped pressure sensor, an inertial measurement unit (IMU), a displacement sensor, a data acquisition and transmission module, a cloud server and a monitoring platform. The system adopts a full-sensor external modular structure, is matched with a six-order Kalman fusion algorithm, a multi-parameter coupling early warning criterion, an IMU dynamic drift calibration model, and a special pre-tightening and anti-loosening installation process, is suitable for various working conditions, realizes synchronous acquisition of multi-dimensional parameters of a bearing, data noise reduction fusion and fault grading early warning, and can realize real-time monitoring of stress, angular acceleration and displacement states of a building isolation bearing.

The invention discloses a numerical control heavy horizontal turning and grinding machine tool sharpening frame structure which comprises a large tool rest, an upper tool rest, a transverse feeding mechanism, a linear hard rail, a sliding guide rail, a worm, a worm gear and a transition body, and the upper tool rest comprises an upper tool rest lower body, a rotary body and a static pressure grinding head; the large tool rest is installed on a lathe bed of the numerical control heavy horizontal turning and grinding machine, and the upper tool rest lower body is installed in the large tool rest. The rotary body is fixed above the upper knife rest lower body through a clamping screw, and the static pressure grinding head is mounted at the top of the rotary body; the transition body is connected below the rotary body, the worm gear is installed on the transition body, and the worm is longitudinally arranged on the upper tool rest lower body and meshed with the worm gear. Through composite arrangement of the linear hard rails and the multiple sets of sliding guide rails, combination of high-rigidity bearing and high-precision guiding is achieved, a stable foundation is provided for micro-feeding, main vertical loads are borne through rolling of the pulleys on the wheel type steel rails, and moving resistance is greatly reduced.

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 utility model discloses a scaling rolling test bench, and relates to the technical field of railway vehicle testing. In the scaling rolling test bed, a track wheel system comprises a track wheel driving module and track wheels connected to the track wheel driving module, and the track wheels comprise six-component wheels; the wheel system comprises a wheel driving module and a scaling wheel connected to the wheel driving module, and the scaling wheel is arranged above the track wheel; the vertical loading system is arranged above the scaled wheel so as to provide a vertical load for the scaled wheel. The rail wheel comprises a six-component wheel, the rail wheel can be directly measured to obtain three-dimensional force and torque, errors caused by indirect calculation by additionally arranging strain gauges on the rail wheel in the prior art are avoided, the testing precision of the wheel rail vibration boundary condition can be improved, meanwhile, the steps of arranging, designing and assembling the strain gauges in the prior art can be avoided, and the testing efficiency is improved. And the assembling convenience is improved.

The invention relates to a coal and rock mass detection device and a use method thereof, and relates to the technical field of coal and rock mass detection. The coal and rock mass detection device comprises a clamping mechanism, a first pressure applying mechanism, a second pressure applying mechanism and a transmission mechanism, the clamping mechanism comprises two clamping blocks which are arranged at intervals in the vertical direction, and a coal and rock mass is arranged between the two clamping blocks; the first pressure applying mechanism is connected with the top surface of the upper clamping block and applies vertically downward pressure to the upper clamping block, the second pressure applying mechanism is connected with the first pressure applying mechanism through the transmission mechanism, and the first pressure applying mechanism is arranged on the side face of the coal rock mass so as to apply pressure in the horizontal direction to the coal rock mass. Due to the fact that the clamping block and the second pressure applying mechanism move through the power of the first pressure applying mechanism, the overall structure of the detection device is simplified, synchronous loading of the vertical load and the horizontal load is achieved, and the real stress state of the coal rock mass is more accurately measured.

This invention relates to a design method for reinforcing rock mass structures with small-diameter piles under post-load conditions in the field of slope protection. The method first obtains the inclination angle θ of the outward-dipping structural surface, the internal friction angle and cohesion c, the sliding mass weight γ, the sliding mass height H, the stress ratio n between the pile and the rock mass at the structural surface, the vertical load q applied to the upper part of the sliding mass after the construction of a single deeply embedded small-diameter anti-slide pile, the sliding mass width b, and the horizontal extension length l. Then, using these parameters, it calculates the initial axial force of the deeply embedded small-diameter anti-slide pile before sliding, the deflection angle of the deeply embedded small-diameter anti-slide pile when the anti-slide force is at its maximum, the minimum compressive stiffness of the small-diameter anti-slide pile, and the axial force and anchorage length of the deeply embedded small-diameter anti-slide pile caused by compression after minor deflection deformation at the structural surface. This invention saves resources compared to empirical design methods.

This invention relates to the field of optical cable testing technology, and in particular to a testing device and method for testing the coupling performance of optical cables with soil. Regarding the testing device, a relative-slip test chamber is used to accommodate a soil sample; a vertical loading mechanism is used to apply a vertical load to the soil sample within the relative-slip test chamber; a transverse loading assembly is used to apply a transverse load to the test chamber assembly; the test optical cable is inserted inside the relative-slip test chamber and is wrapped by the soil sample; the optical cable tensioning mechanism and the optical cable fixing fixture work together to apply pre-tension stress to the test optical cable, maintaining deformation coupling with the soil sample. During the test, real-time deformation data of the soil sample and strain response data of the test optical cable are simultaneously acquired, comprehensively recording the mechanical changes throughout the entire process from elastic coupling and micro-slippage to debonding failure between the test optical cable and the soil sample, thereby achieving multi-dimensional, full-process quantitative testing of the coupling performance between the optical cable and soil.

The invention relates to hanging basket equipment for a continuous beam and a hanging mechanism and a construction method of the hanging basket equipment. The suspender adopts I-shaped section steel composed of two opposite wing plates and a middle web plate, the web plate transmits axial tension, the wing plates increase the inertia moment of a transverse stress section, the wing plates and the web plate form a collaborative stress system, and lateral bending deformation in the thickness direction is effectively restrained. The cross section of a locking hole of the locking mounting base is of a big-end-up conical structure, the two locking inclined blocks are attached to the inner wall of the locking hole and the two sides of a suspender web correspondingly, and the self-locking effect that the larger the load is, the higher the extrusion force is is is formed. Meanwhile, the limiting protrusion abuts against the locking inclined block, the contact area is increased to share part of vertical loads, and meanwhile the locking inclined block and the hanging rod are limited to move in the locking state. The limiting protrusions are arranged at intervals in the length direction of the hanging rod, a plurality of adjusting gears are formed, the vertical height of the bottom basket mechanism can be adjusted, and the pouring height requirements of different cantilever beam sections are met.

The utility model relates to a bridge large cantilever flange plate reinforcing and supporting structure which comprises a bridge body and a cantilever arranged on one side of the bridge body. A light-weight supporting mechanism used for supporting the cantilever is arranged between the bottom of the cantilever and one side of the bridge body, the L-shaped supporting frame and the inclined supporting inclined rod form a triangular stable system, when the cantilever bears a vertical load, the load is transmitted to the bridge body through the supporting frame, the supporting inclined rod provides horizontal resistance, the bending moment of the root of the cantilever is remarkably reduced, and the stability of the cantilever is improved. Due to the high strength of the aluminum alloy material and the filling of the foam core material, it is ensured that the structure has enough flexural rigidity on the premise of light weight, local buckling is avoided, the supporting inclined rods are inserted into the corresponding mounting grooves of the supporting frame for positioning through the upper mounting base and the lower mounting base, final fixing is completed through the limiting pieces, and when the mounting bolts are screwed into the limiting sleeves, the supporting inclined rods are fixed. The sleeve presses the mounting base to be tightly attached to the mounting groove to form rigid connection, welding is not needed through the design, the pre-tightening force of the bolt is adjustable, and different load requirements are met.

This prevents deterioration of workability, deterioration of pier quality, increase in construction costs, and prolongation of construction periods. [Solution] Pier brackets 3a to 3d have side portions 12a1, 12a2, 12b1, 12b2, 12c1, 12c2, 12d1, 12d2 and vertical support portions 13a to 13d connected to side portions 12a1, 12a2, 12b1, 12b2, 12c1, 12c2, 12d1, 12d2, and vertical support portions 13a to 13d are configured to be able to transmit vertical loads to the pier 2, and are installed on the pier 2 without drilling mounting holes in the pier 2.

The tension control system of a roll-to-roll facility related to the present embodiment may comprise: a load cell which comprises an unwinder provided to unwind a substrate, a rewinder provided to wind the substrate, and transfer rolls arranged between the unwinder and the rewinder to guide travelling of the substrate, and is provided to measure a vertical load of the travelling substrate; a friction coefficient measuring unit provided to measure a friction coefficient between the travelling substrate and the transfer rolls; a dancer roll which guides the travelling of the substrate and is provided to be movable in a direction perpendicular to the width direction of the substrate; and a tension controller provided to receive a measured value input from the load cell and a measured value input from the friction coefficient measuring unit to control operation of the dancer roll so as to control tension of the travelling substrate.

This invention relates to the field of straddle-type monorail vehicle operation simulation testing technology, and discloses a method and apparatus for simulating the operation of straddle-type monorail vehicles. The method involves adjusting the test bench to match the vehicle's wheel system, applying a vertical load to simulate vehicle weight using an axle load-simulating actuator, and achieving longitudinal and lateral fixation through a traction rod and pulley system. An onboard detection system acquires track irregularity displacement signals and track spectra from the actual track, which are then imported into a vibration simulation system to drive a vibration simulation device to reproduce the vehicle's operating state. Stability parameters are tested using sensors to complete the overall vehicle vibration reliability test. The corresponding apparatus includes a test bench foundation, a reaction frame, a loading gantry, and a vibration simulation system. This invention can accurately simulate actual operating conditions, achieve fault reproduction and extreme condition assessment, and effectively improve the realism and efficiency of the test.

The utility model relates to the field of packaging boxes, in particular to a paper folding packaging box for a stove. The defect that an existing packaging box is poor in multi-direction bearing adaptability is overcome. A paper folding packaging box for a stove comprises an outer box B, supporting pieces and side face limiting pieces, and the supporting pieces are arranged between the two ends of a product A and the outer box B. The paper folding packaging box for the stove is characterized in that the side face limiting pieces are connected to the two sides of the supporting pieces in a clamped mode and used for conducting structural limiting and supporting reinforcing on the supporting pieces. The vertical load of a product acting on the upper bracket and the lower bracket is uniformly shared through the longitudinal Chinese character'chuan '-shaped layout, and the lengths of the three lower paper cards and the three upper paper cards are matched with the inner diameters of cavities of the lower bracket and the upper bracket, so that the rigidity of side surface structures of the lower bracket and the upper bracket can be effectively enhanced, and lateral inward sinking caused by stress during transportation is inhibited.

The embodiment of the invention provides an ANSYS-based spherical wood reticulated shell shape finding analysis method, which comprises the following steps that: an association table of a reticulated shell structure model and parameter elements is constructed, the association table comprises a reticulated shell structure model identifier and a parameter element identifier corresponding to the reticulated shell structure identifier, the reticulated shell structure model comprises a crossed truss system model, and the parameter element identifier corresponds to the crossed truss system model; the parameter elements comprise structural physical parameters, a material constitutive model, node flexural rigidity, initial defects, structural nonlinearity and node semi-rigidity; obtaining parameter elements, and determining a reticulated shell structure model through the association table according to the parameter elements; and constraint conditions and loads are determined, iterative stress analysis is conducted on the latticed shell model, an optimized structure model is obtained, the constraint conditions include that the node rigidity of the latticed shell support should be larger than the node rigidity between components, the variable parameters include vertical loads, and the vertical loads include the self weight, the snow load and the wind load. And the shape finding efficiency and accuracy are improved.

The utility model relates to the technical field of auxiliary frame bushings, in particular to an auxiliary frame bushing preloading test fixture, which comprises a fixture upper main body, a first fixture lower main body, a second fixture lower main body and an auxiliary frame bushing, a test ring is arranged between the side walls, close to each other, of the first clamp lower main body and the second clamp lower main body, a backing ring is arranged on the side wall of the inner ring of the test ring, the inner side wall of the backing ring is attached to the outer side wall of the auxiliary frame bushing, and a groove right opposite to the test ring is formed in the lower end of the clamp upper main body. According to the utility model, the first clamp lower main body and the second clamp lower main body are arranged, and the first clamp lower main body and the second clamp lower main body are fixed through the four second bolts, so that the auxiliary frame bushing has lateral preload, and the problems that in the prior art, when radial rigidity is detected, only vertical load can be loaded, and preload cannot be increased in the lateral direction are solved; the detected rigidity cannot truly reflect the loading state rigidity, so that the detected radial rigidity is inconsistent with the rear axial rigidity of actual loading preloading.

The utility model discloses a forklift speed reducer output end dynamic load loading test device which comprises a platform and a vertical load loading assembly, the vertical load loading assembly comprises a sample support and a hydraulic machine support, a hydraulic assembly is arranged on the hydraulic machine support, a forklift speed reducer is installed on the sample support and below the hydraulic assembly, and the hydraulic assembly is arranged on the platform. Rolling assemblies are arranged at the bottom of the hydraulic machine support and on the platform. The vertical load loading assembly for providing the vertical load is arranged in the middle of the forklift speed reducer, the dynamic load loading test of the output end of the forklift speed reducer can be achieved in the sample piece development stage, and the failure risk occurring when the forklift speed reducer is subjected to the dynamic load is avoided in advance; the time and money cost consumed by a subsequent whole vehicle road simulation experiment is reduced; the rolling assemblies are arranged on the upper portion and the lower portion of the output end of the forklift speed reducer, vertical pressure can be transmitted, it can be guaranteed that the output end of the forklift speed reducer is in a rotating state in the test, dynamic load loading testing is used, and the testing precision is improved.

The invention provides an LED all-in-one machine which comprises an LED box body and an inclined strut assembly, and the inclined strut assembly comprises a main arm, an inner arm and a clamping piece. When the bottom of the LED box body is driven by external force to move, the inner arm can slide along the main arm and drive the clamping piece to enter the containing opening, the clamping piece is clamped to the edge of the main arm after rotating at the containing opening, and mechanical locking is formed. According to the arrangement, rapid adjustment and fixation of the supporting angle of the LED box body can be achieved without additional tools, the LED box body is particularly suitable for scenes needing frequent debugging or temporary installation, and a user can conveniently, rapidly and efficiently complete back maintenance of the LED box body. Moreover, the main arm, the inner arm and the mounting surface can form a triangular supporting system, the self weight and external load of the LED box body are resisted by utilizing the geometric stability of a triangle, the supporting system can convert vertical load into axial pressure and transmit the axial pressure to the mounting surface, meanwhile, the node rigidity is enhanced through the clamping effect of the clamping pieces, and the oblique supporting stability of the LED box body is ensured.

This invention discloses a method for analyzing and calculating the tensile force of reinforced bodies in a reinforced cushion layer of a pile-net composite foundation, comprising: S1, obtaining the basic parameters of the pile-net composite foundation according to the design scheme of the pile-net composite foundation, including embankment parameters and reinforced foundation parameters; S2, calculating the average stress of the soil between piles at the pile top plane of the pile-net composite foundation based on the embankment parameters and reinforced foundation parameters; S3, calculating the average ground reaction force at the base of the reinforced cushion layer of the pile-net composite foundation; S4, calculating the total tensile force of the reinforced bodies caused by vertical loads based on the average stress of the soil between piles obtained in S2 and the average ground reaction force obtained in S3; S5, calculating the total tensile force of the reinforced bodies caused by the slope thrust effect; S6, calculating the tensile force of each layer of reinforced bodies in the reinforced cushion layer of the pile-net composite foundation. This method is applicable to more complex application scenarios and is a means of calculating the tensile force of reinforced bodies in reinforced cushion layers with both high calculation efficiency and accuracy.

The application discloses a kind of arch-shaped large-span cable bridge of triangular cross section and installation method thereof, including the arch-shaped bridge that is arched upward and presents arc-shaped structure, cable protection pipe and / or communication protection pipe are laid in the arch-shaped bridge inside along its length trajectory direction, the cross section of the arch-shaped bridge along its length trajectory direction presents triangular structure, the arch-shaped bridge that is arched upward and presents arc-shaped structure sag-span ratio is 0.1~1.0;The cross section of arch-shaped bridge adopts isosceles triangle structure, can satisfy the requirement of cable laying, and the vertical load and transverse horizontal wind load of bridge are possibly reduced to maximum;With the sag-span ratio of 0.1~1.0 arch-shaped longitudinal section, bearing capacity is good, and deformation control is good;The upper chord truss main steel pipe of arch-shaped bridge, lower chord truss single-side chord and lower chord truss opposite side chord are all made of round steel pipe, and wind resistance is good.

The application discloses a microcomputer-controlled electro-hydraulic servo bridge expansion device testing machine, which comprises a base, a detection platform and a detection device. The base is provided with transverse sliding rails, longitudinal sliding rails and at least two groups of movable gantries. The detection platform comprises a first platform and a second platform. The first platform is provided with a vertical misalignment cylinder between the first platform and the transverse sliding rails. The second platform is provided with a misalignment turntable rail between the second platform and the longitudinal sliding rails. The detection device comprises transverse detection devices, longitudinal detection devices and vertical detection devices. The transverse detection devices can exert a transverse load on the first platform. At least two longitudinal loading cylinders of the longitudinal detection devices can independently exert a longitudinal load on the second platform. A plurality of vertical loading cylinders of the vertical detection devices can independently exert a vertical load on different parts of the bridge expansion device. The application can simulate longitudinal inclination, vertical inclination, transverse misalignment and multi-directional composite deformation conditions, and comprehensively detect the sealing performance, fatigue life and structural reliability of the bridge expansion device.

The utility model relates to the technical field of soft rock creep tests, and discloses a soft rock creep test device suitable for a water-rich environment, which comprises a bottom plate, a pressure cylinder is arranged at the top end of the bottom plate, a first cushion block is arranged in the pressure cylinder, a standard soft rock sample manufactured in advance is arranged at the top end of the first cushion block, and a second cushion block is arranged at the top end of the standard soft rock sample. A second cushion block for pressing the standard soft rock sample is arranged at the top end of the standard soft rock sample. According to the soft rock creep test device suitable for the water-rich environment, a vertical load can be applied to the second cushion block through the lever principle, so that the stable and uniform loading effect is achieved, and the vertical loading effect in a creep test is achieved. The axial confining pressure is applied to water in the pressure cylinder through oxygen delivery of the oxygen bottle, so that the confining pressure can be stably and uniformly loaded, and the effect of horizontally loading the confining pressure in a creep test is realized. Different test requirements are met by adjusting the position of the connecting hook, adjusting the weight mass and controlling the air pressure of the oxygen cylinder to be continuously and vertically loaded step by step.

This utility model discloses an underground powerhouse excavation support device based on water conservancy construction, belonging to the field of water conservancy engineering construction technology. It includes an underground powerhouse frame and foundation. Support components are supported on the inner wall of the underground powerhouse frame. Multiple support base trenches are excavated at equal intervals on the top surface of the foundation. A support stabilizing member is laid at the bottom of each support base trench. Vertical steel cages are installed at both ends of the top surface of the support stabilizing member. Each vertical steel cage contains a poured concrete support column. Each concrete support column has a concrete leveling layer on its top surface. Guide rails are installed on each row of concrete leveling layers. The support components are mounted on two guide rails and slide within the underground powerhouse frame to support the required location. This utility model utilizes the steel reinforcement cage and concrete working together to withstand large vertical loads, improving support capacity and stability.

The invention discloses a mining method tunnel surrounding rock load method for an aeolian sand stratum, belongs to the technical field of tunnel engineering support, and solves the problems that the existing method cannot effectively describe complex interaction among aeolian sand particles and the influence of the complex interaction on load transmission, so that the strength of a support structure is insufficient, and potential safety hazards are caused. The method comprises the steps that the coarse particle proportion is determined according to particle grading information of an aeolian sand stratum where tunnel engineering is located, the lateral pressure coefficient is calculated based on the coarse particle proportion, and the vertical pressure and the lateral pressure of tunnel surrounding rock are calculated based on an aeolian sand stratum mechanical model in combination with the lateral pressure coefficient; in the embodiment of the invention, based on the aeolian sand stratum mechanical model, not only is the transmission of vertical load considered, but also the non-uniform distribution of the internal stress of the sliding body in the horizontal direction is considered. Therefore, the calculation of the tunnel face load and the lateral pressure borne by the lining structure is more practical.

The utility model provides a VHMT combined load loading device which can independently apply a vertical load, a horizontal load, a bending moment, a torque and any combined load of the loads. The VHMT combined load loading device comprises a support frame and a loading unit arranged in the support frame, the loading unit comprises a vertical and bending moment loading module, a horizontal loading module, a torque loading module and a spherical hinge module; the horizontal loading module is connected with the vertical and bending moment loading module and is used for applying horizontal force; the vertical and bending moment loading module is connected with the torque loading module through a spherical hinge module, and the spherical hinge module is used for transmitting bending moment and force downwards and isolating torque at the same time; the vertical and bending moment loading module is used for applying vertical force and bending moment; the torque loading module is used for applying torque.