CN113529681A - Roadbed dynamic triaxial resilience modulus tester - Google Patents

Abstract

The invention discloses a roadbed dynamic triaxial resilience modulus tester, which comprises a servo oil source control system, a high-pressure oil pipe, a loading system, a movable environment box and upper computer control software, wherein the servo oil source control system is connected with the loading system through the high-pressure oil pipe, the loading system is pressurized by the servo oil source control system through the high-pressure oil pipe, and the servo oil source control system and the loading system both work under the control of the upper computer software; when the tester is used, the relation between fatigue accumulated deformation and loading cycle times of the concrete test piece under the action of constant-amplitude repeated load can be measured under the action of the constant-amplitude repeated load, so that the compressive fatigue deformation resistance of the concrete can be reflected, the fatigue life of the concrete test piece bearing repeated load under the specified condition can be measured, and the tester has the characteristics of high measurement precision and high automation degree.

Description

Roadbed dynamic triaxial resilience modulus tester

Technical Field

The invention relates to the technical field of roadbed safety equipment, in particular to a roadbed dynamic triaxial resilience modulus tester.

Background

The resilience modulus of the roadbed soil is the most important mechanical parameter for representing the strength of a roadbed and is one of main parameters of pavement structure design, and the value of the resilience modulus of the roadbed soil in the pavement design has a direct relation with the design thickness of the thicknesses of a base layer and a surface layer. The stress characteristic of the soil foundation is determined by the physical properties of soil, and the soil is a three-phase system consisting of solid particles, water and gas. As an engineering material, the soil has great difference from other engineering materials in engineering mechanical property due to the particularity of the internal structure, wherein the most prominent characteristic is the nonlinear deformation characteristic of the soil when being stressed. The resilience modulus can better reflect partial elastic characteristics of the soil foundation, so that when the stress characteristics of the soil foundation are represented by an elastic semi-spatial body foundation model, the resilience modulus can be used for representing the recoverable deformation property of the soil foundation under the action of instantaneous load.

The design methods of the existing design specifications of highway cement concrete pavements (JTG D40-2011) and the design specifications of highway asphalt pavements (JTG D50-2019) in China all use the resilience modulus as the strength index of a soil foundation, and the reference value of the resilience modulus of a roadbed recommended in the specifications is the result of detailed investigation and test in China, mainly represents the roadbed condition of roads below two levels before and after the 60 th year of the 20 th century in China and is the static resilience modulus, for example, the improved fast measuring device for the resilience modulus of the soil foundation disclosed in the Chinese patent (CN201320306631.7) cannot accurately reflect the mechanical response of the roadbed of a high-grade highway under the action of dynamic repeated load. At present, foreign pavement design methods such as American mechanical experience method and the like all adopt dynamic resilience modulus as a strength index of roadbed soil. The asphalt pavement design specification being revised in China already adopts the dynamic resilience modulus parameter of the roadbed soil as a new roadbed soil strength index, but corresponding estimation systems and methods are few.

Disclosure of Invention

Aiming at the existing problems, the invention aims to provide a roadbed dynamic triaxial resilience modulus tester, which can measure the relation between the fatigue accumulated deformation and the loading cycle times of a concrete test piece under the action of constant-amplitude repeated load and reflect the compression-resistant fatigue deformation performance of concrete under the action of constant-amplitude repeated load when used, thereby measuring the fatigue life of the concrete test piece under the specified condition and having the characteristics of high measurement precision and high automation degree.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a roadbed dynamic triaxial resilience modulus tester comprises a servo oil source control system, a high-pressure oil pipe and a loading system, wherein the servo oil source control system is connected with the loading system through the high-pressure oil pipe;

the servo oil source control system comprises an oil tank, a refrigerator and an oil source water drum, wherein the refrigerator and the oil source water drum are arranged on the oil tank and are respectively used for refrigerating the oil tank and supplying water; an oil return port and an oil outlet are also formed in the oil tank, and the oil return port and the oil outlet are respectively connected with one end of the high-pressure oil pipe to provide hydraulic power for the loading system;

the loading system comprises a main pressure frame and a pressure actuating device, wherein the pressure actuating device is arranged on the main pressure frame and is connected with a high-pressure oil pipe, pressure is applied to a sample placed on the main pressure frame through the pressure actuating device, and the sample is arranged on a tray of the main pressure frame through a sample fixing assembly.

Preferably, the main pressure frame comprises a main frame support, a hydraulic oil cylinder, a polished rod, a steel seat, an upper beam plate, a tray connecting seat and a lower base, the main frame support is of a trapezoidal frame structure, the hydraulic oil cylinder is arranged on the main frame support through an oil cylinder disassembling plate assembly, and a piston of the hydraulic oil cylinder is connected with the upper beam plate through the steel seat; the pressure actuating device is arranged on the upper beam plate, and the tray is arranged on the lower base right below the pressure actuating device and is connected with the lower base through a tray connecting seat; the polish rod is arranged on the inner side of the hydraulic oil cylinder at the corresponding position, the upper end of the polish rod penetrates through the upper beam plate and is movably connected with the upper beam plate, and the lower end of the polish rod is connected with the lower base through a nut.

Preferably, the oil cylinder disassembling plate assembly comprises a first ascending oil cylinder base disassembling plate and a second ascending oil cylinder base disassembling plate, the first ascending oil cylinder base disassembling plate is welded on the host bracket in an equilateral triangle shape, the second ascending oil cylinder base disassembling plate is welded with the first ascending oil cylinder base disassembling plate, and the base of the hydraulic oil cylinder is located on the second ascending oil cylinder base disassembling plate; and the lower base is also provided with a first lifting cylinder clamping plate and a second lifting cylinder clamping plate which are matched with each other for use, so that the hydraulic oil cylinder is fixed.

Preferably, the upper beam plate is an equiangular triangular steel plate, a steel shaft through hole, a polished rod through hole and bolt fastening holes are formed in the upper beam plate, the steel shaft through hole is formed in the center of the upper beam plate and used in cooperation with the pressure actuating device, the polished rod through holes are formed in three corners of the upper beam plate and used in cooperation with the polished rod, and the bolt fastening holes are formed in the outer side of the polished rod through hole and used in cooperation with the steel base.

Preferably, the pressure actuating device include efflux cast electro-hydraulic servo valve, two effect hollow jack, connecting piece, sensor connecting axle, connecting seat, draw pressure formula sensor, sensor connecting rod and pressure head, two effect hollow jack are fixed on the upper beam plate, efflux cast electro-hydraulic servo valve sets up the tail end at two effect hollow jack, and efflux cast electro-hydraulic servo valve is connected with high pressure fuel pipe, the one end of connecting piece is passed steel axle cross-under hole and is connected with the piston end of two effect hollow jack, and the other end passes through the sensor connecting axle and is connected with the connecting seat, and is provided with the draw pressure formula sensor on the sensor connecting axle, the connecting seat passes through the sensor connecting rod and is connected with the pressure head.

Preferably, the fixed subassembly of sample include top board, holding down plate and connecting rod, the sample sets up between top board and holding down plate, and the top board passes through the connecting rod with the holding down plate to be connected, just be provided with the displacement survey hole on the top board, the displacement survey hole is used with the cooperation of the modulus of resilience test subassembly of setting on the polished rod.

Preferably, resilience modulus test assembly include locking buckle, first cantilever, second cantilever and displacement sensor, the locking buckle sets up the one end at first cantilever, and the activity chucking is on the polished rod, the other end of first cantilever is connected with the one end of second cantilever through rotating the connecting piece, and the other end and the fastener of second cantilever are connected, the movable block of displacement sensor is in the fastener.

Preferably, the rotating connecting piece comprises a limiting bolt, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are respectively provided with a through hole for the first cantilever and the second cantilever to pass through, and the limiting bolt is arranged on the first connecting piece and is matched with a limiting clamping groove arranged on the first cantilever for use; the outer end of the second cantilever is hinged with the clamping piece, and the front end of the displacement sensor is matched with the displacement measuring hole for use.

Preferably, the lower end of the first connecting piece is provided with an inserting connecting rod, the inserting connecting rod is connected with a universal ball embedded on the second connecting piece through a bolt shaft, the second connecting piece on one side of the universal ball is also provided with a clamping groove, a universal ball limiting assembly is arranged in the clamping groove, the universal ball limiting assembly comprises an adjusting rod piece, a threaded sleeve, a movable rod and a limiting block, the threaded sleeve is clamped into one side of the universal ball through the clamping groove and is connected with the second connecting piece through a limiting disc and a limiting nut, and the adjusting rod piece is arranged on the outer side of the threaded sleeve and is in threaded connection with the threaded sleeve; the movable rod movable sleeve is arranged in the threaded sleeve, the sleeve joint section of the movable rod is provided with a reset spring in a clamped mode, the tail end, extending out of one end of the threaded sleeve, of the movable rod is connected with the limiting block, the limiting block is an arc-shaped limiting block, and a rubber pad is arranged on the inner side of the limiting block.

Preferably, the lower extreme of grafting connecting rod be provided with first annular butt joint groove and first square plug-in connection piece, first annular butt joint groove uses with the cooperation of the second annular bulge loop that sets up in universal ball upper end, first square plug-in connection piece uses with the cooperation of the square draw-in groove of second that sets up in universal ball upper end.

The invention has the beneficial effects that: the invention discloses a roadbed dynamic triaxial resilience modulus tester, compared with the prior art, the improvement of the invention is as follows:

aiming at the problems in the prior art, the invention designs a roadbed dynamic triaxial resilience modulus tester, which comprises a servo oil source control system, a high-pressure oil pipe, a loading system and a movable environment box, wherein when in use:

(1) the servo oil source control system adjusts oil temperature and oil pressure through the adjusting mechanism, the refrigerating mechanism, the alarming mechanism and the action mechanism, and provides stable hydraulic power for the loading system;

(2) the hydraulic power comprises a main pressure frame and a pressure actuating device, when the hydraulic pressure testing device is used, the height of the pressure actuating device is lifted according to the size of a sample through a hydraulic oil cylinder, and meanwhile, under the action of applying equal-amplitude repeated load to the sample through the pressure actuating device, the relation between fatigue accumulated deformation and loading cycle times of the concrete sample under the action of the equal-amplitude repeated load is measured, so that the compression and fatigue deformation resistance of concrete is reflected, the fatigue life of the concrete sample under the specified condition for bearing the repeated load is measured, the elastic modulus of time is measured, and the hydraulic pressure testing device is high in testing precision and convenient to use;

(3) simultaneously when pressure is exerted for the test piece at pressure actuating device, the pressure mode that adopts is triaxial pressurization and triaxial survey the displacement, is convenient for measure the resilience modulus to a plurality of positions of test piece, and is simple to use, measure convenient.

Drawings

Fig. 1 is a schematic structural diagram of the roadbed dynamic triaxial resilience modulus tester.

FIG. 2 is a schematic structural diagram of a servo oil source control system according to the present invention.

FIG. 3 is a side view of the servo oil supply control system of the present invention.

FIG. 4 is a schematic structural diagram of a loading system according to the present invention.

Fig. 5 is a side view of the loading system of the present invention.

Fig. 6 is a top view of the upper beam panel of the present invention.

Fig. 7 is a cross-sectional view of an upper beam panel of the present invention.

FIG. 8 is a front view of the portable environmental chamber of the present invention.

Fig. 9 is a schematic view of the open mobile environment box of the present invention.

Fig. 10 is a schematic structural view of the sample holding member of the present invention.

FIG. 11 is a front view of a modulus of restitution test assembly according to the present invention.

FIG. 12 is a schematic structural view of a modulus of restitution test assembly according to the present invention.

Figure 13 is a cross-sectional view of a rotational connection of the present invention.

Fig. 14 is a cross-sectional view of a second connector of the present invention.

Fig. 15 is a partially enlarged view of the second connecting member a of the present invention.

Wherein: 1. the system comprises a servo oil source control system, a refrigerating machine, a main power supply 12, a power supply knob 13, a power supply knob 14, a pressure regulating knob 15, a first emergency unloading 16, a refrigeration switch 17, a stop button 18, a start button 19, a power supply indicator lamp 110, a start indicator lamp 111, an oil temperature indicator lamp 112, a second emergency unloading 113, an oil temperature alarm 114, an oil filter alarm 115, a main pressure gauge 116, an oil return gauge 117, an oil source shell 118, an oil source door 119, an oil return port 120, an oil outlet 121, an oil source water bag 122, a water inlet 123, a water outlet 124, an oil source supporting leg 125, an oil tank 2, a high-pressure oil pipe 3, a loading system 31, a main engine lower portion 32, a first rising apron board base detaching board 33, a second rising oil cylinder base detaching board 34, a main engine support 35, a main engine lower inner portion, an apron board 36, a main engine upper cover board 37, a hydraulic oil cylinder, 38. an upper inner skirt board of the main machine 39, an upper outer skirt board of the main machine 310, a flat washer 311, an inner hexagon socket head cap screw 312, a light lever 313, a steel seat 314, an upper beam plate 3141, a steel shaft through hole 3142, a light rod through hole 3143, a bolt fastening hole 315, a hanging ring 316, a motor servo actuator 317, a jet pipe type electro-hydraulic servo valve 318, a double-acting hollow jack 319, a connecting member 320, a sensor connecting shaft 321, a connecting seat 322, a tension and compression type sensor 323, a sensor connecting rod 324, a tray 325, a tray connecting seat 326, a lower base 327, a first lifting cylinder clamp 328, a second lifting cylinder clamp 329, a nut 330, a locking buckle 331, a first cantilever arm 3311, a limit clamping groove 332, a second cantilever arm 333, a rotary connecting member 3331, a limit bolt 3332, a first connecting member, a second connecting member 893333, a second connecting member 33331, a clamping groove, 3334. a plug connecting rod, 33341, a first annular butt joint groove, 33342, a first square plug block, 3335, a through hole, 3336, a plug shaft, 3337, a universal ball, 33371, a second annular convex ring, 33372, a second square clamping groove, 3338, a universal ball limiting component, 33381, an adjusting rod piece, 33382, a threaded sleeve, 33383, a movable rod, 33384, a limiting block, 33385, a return spring, 33386, a limiting nut, 334, a clamping piece, 335, a displacement sensor, 336, a pressure head, 4, a movable environment box, 41, a movable environment box shell, 42, a movable environment box sealing plate, 43, a movable environment box inner container, 44, a movable environment box handle, 45, left and right cover plates on the movable environment box, 46, a rear cover plate on the movable environment box, 47, front and rear cover plates under the movable environment box, 48, left and right cover plates under the movable environment box, 49, universal wheels, 410, a heat preservation door of the movable environment box, 5, a sample, 51, an upper pressure plate, 511. displacement measuring hole, 52, lower pressure plate, 53, connecting rod.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following further describes the technical solution of the present invention with reference to the drawings and the embodiments.

Referring to the accompanying drawings 1-15, the roadbed dynamic triaxial resilience modulus tester comprises a servo oil source control system 1, a high-pressure oil pipe 2, a loading system 3, a movable environment box 4 and upper computer control software, wherein the servo oil source control system 1 is connected with the loading system 3 through the high-pressure oil pipe 2, the loading system 3 is pressurized by the servo oil source control system 1 through the high-pressure oil pipe 2, and the servo oil source control system 1 and the loading system 3 both work under the control of the upper computer software;

the servo oil source control system 1 comprises an oil tank 125, a refrigerator 11 and an oil source water bag 121 which are arranged on the oil tank 125, wherein the refrigerator 11 and the oil source water bag 121 are respectively used for refrigerating and supplying water to the oil tank 125, so that stable hydraulic pressure can be provided for a loading system 3; an oil return port 119 and an oil outlet 120 are further arranged on the oil tank 125, and the oil return port 119 and the oil outlet 120 are respectively connected with one end of the high-pressure oil pipe 2 to form a pressure cycle to provide hydraulic power for the loading system 3;

the loading system 3 comprises a main pressure frame and a pressure actuating device, the pressure actuating device is arranged on the main pressure frame, the pressure actuating device is connected with the high-pressure oil pipe 2, the pressure actuating device is used for applying pressure to a sample 5 placed on the main pressure frame, the sample 5 is arranged on the main pressure frame through a sample fixing component, the sample fixing component comprises an upper pressure plate 51, a lower pressure plate 52 and a connecting rod 53, the sample 5 is fixedly arranged between the upper pressure plate 51 and the lower pressure plate 52, the upper pressure plate 51 is connected with the lower pressure plate 52 through the connecting rod 53, the sample 5 is fixed, and a displacement measuring hole 511 is formed in the upper pressure plate 51.

Preferably, in order to provide a stable hydraulic pressure, an adjusting mechanism, a refrigerating mechanism, an alarm mechanism and an actuating mechanism are further disposed on the oil tank 125; the adjusting mechanism comprises a main power supply 12, a power supply knob 13, a stop button 17, a start button 18 and a start indicator lamp 110, wherein the main power supply 12 is used for supplying power to the whole device and supplying power to the oil tank 125, and the stop button 17 and the start button 18 are used for starting and disconnecting the work of the oil tank 125 and displaying the work through the start indicator lamp 110; the refrigerating mechanism comprises a refrigerating switch 16 and an oil temperature and temperature display meter 111, the refrigerating switch 16 is used for controlling the refrigerator 11 to work, and the oil temperature is displayed through the oil temperature and temperature display meter 111 when the refrigerating mechanism is used; the alarm mechanism comprises an oil temperature alarm 113, an oil filtration alarm 114, a main pressure gauge 115 and an oil return gauge 116, wherein the oil temperature alarm 113 is used for alarming the oil temperature and starting the refrigeration mechanism to work, and the oil filtration alarm 114 is used for measuring the filterability of oil and controlling the main pressure gauge 115 and the oil return gauge 116 to work; the action mechanism comprises a first emergency unloading 15 and a second emergency unloading 112, and is used for unloading according to experimental requirements so that the unloading pressure of the action mechanism reaches the requirements.

Preferably, the oil source water bag 121 is further provided with a water inlet 122 and a water outlet 123, the water inlet 122 and the water outlet 123 are connected with the water tank through water pipes, and water is supplied to the oil source water bag 121.

Preferably, the main pressure frame comprises a main frame support 34, a hydraulic oil cylinder 37, a polished rod 312, a steel seat 313, an upper beam plate 314, a tray 324, a tray connecting seat 325 and a lower base 326, the main frame support 34 is of a trapezoidal frame structure, the hydraulic oil cylinder 37 is arranged on the main frame support 34 through an oil cylinder disassembling plate assembly, a piston of the hydraulic oil cylinder 37 is connected with the upper beam plate 314 through the steel seat 313, the upper beam plate 314 is driven to move up and down through the piston movement of the hydraulic oil cylinder 37, the pressure actuating device is arranged on the upper beam plate 314, when the main pressure frame is used, pressure is applied to the test piece 5 through the pressure actuating device, the tray 324 is arranged on the lower base 326 right below the pressure actuating device, the test piece 5 is placed on the tray 324, the tray 324 is connected with the lower base 326 through the tray connecting seat 325, and the lower base 326 is arranged on the main frame support 34; the polish rod 312 is arranged at the inner side of the hydraulic oil cylinder 37 at the corresponding position, the upper end of the polish rod 312 penetrates through the upper beam plate 314 and is movably connected with the upper beam plate 314, the lower end of the polish rod 312 is connected with the lower base 326 through the nut 329, when the polish rod is used, the upper beam plate 314 is driven to move along the polish rod 312 through the movement of the piston rod of the hydraulic oil cylinder 37, and the polish rod 312 plays a guiding role.

Preferably, for fixing hydraulic cylinder, the cylinder detaching assembly comprises a first lifting cylinder base detaching plate 32 and a second lifting cylinder base detaching plate 33, the first lifting cylinder base detaching plate 32 is welded on the host bracket 34 in an equilateral triangle manner, the second lifting cylinder base detaching plate 33 is welded with the first lifting cylinder base detaching plate 32, and the base of the hydraulic cylinder 37 is seated on the second lifting cylinder base detaching plate 33 to support and fix the hydraulic cylinder 37.

Preferably, in order to limit the position between the hydraulic cylinder 37 and the lower base 326 and prevent the upper cover plate 36 of the main machine from moving, a first lifting cylinder clamp 327 and a second lifting cylinder clamp 328 which are used in cooperation with each other are further provided on the lower base 326, that is, when in use, the hydraulic cylinder 37 is clamped by the first lifting cylinder clamp 327 and the second lifting cylinder clamp 328 and is limited on the lower base 326, and the hydraulic cylinder 37 is fixed.

Preferably, in order to perform three-axis pressurization on the test piece 5, the upper beam plate 314 is an equiangular triangular steel plate, a steel shaft through hole 3141, a polished rod through hole 3142 and a bolt fastening hole 3143 are arranged on the upper beam plate 314, the steel shaft through hole 3141 is arranged on the center of mass of the upper beam plate 314 and is matched with a pressure actuating device for use, the middle 5 is pressurized, the polished rod through holes 3142 are arranged on three corners of the upper beam plate 314 for the polished rod 312 to pass through and be matched with the polished rod 312 for use, and the bolt fastening hole 3143 is arranged on the outer side of the polished rod through hole 3142 and is matched with a tightening bolt for use to fix the steel base 313.

Preferably, in order to pressurize the test piece 5, the pressure actuating device comprises a jet pipe type electro-hydraulic servo valve 317, a double-acting hollow jack 318, a connecting piece 319, a sensor connecting shaft 320, a connecting seat 321, a tension-compression type sensor 322, a sensor connecting rod 323 and a pressure head 336, the double-acting hollow jack 318 is fixed on the upper beam plate 314, the jet pipe type electro-hydraulic servo valve 317 is arranged at the tail end of the double-acting hollow jack 318, the jet pipe type electro-hydraulic servo valve 317 is connected with the high-pressure oil pipe 2, the flow of the high-pressure oil pipe 2 is controlled through the jet pipe type electro-hydraulic servo valve 317, one end of the connecting piece 319 penetrates through a steel shaft through connecting hole 3141 to be connected with the piston end of the double-acting hollow jack 318, the other end is connected with the connecting seat 321 through the sensor connecting shaft 320, and the tension-compression type sensor 322 is arranged on the sensor connecting shaft 320 to sense the shaft pressure, the connecting seat 321 is connected with the pressure head 336 through the sensor connecting rod 323, and when the pressure-type pressure sensor device is used, the pressure head 336 is driven by the pull-press type sensor 322 to apply pressure to time, and pressure feedback is performed through the pull-press type sensor 322.

Preferably, in order to timely feed back the compression condition of the test piece 5 during the compression process, a resilient modulus testing assembly is further disposed on the polish rod 312, and includes a locking buckle 330, a first cantilever 331, a second cantilever 332 and a displacement sensor 335, the locking buckle 330 is disposed at one end of the first cantilever 331, and the locking buckle 330 is of a buckle structure, the locking buckle 330 is clamped on the polished rod 312 through a fastening bolt, the position of the locking buckle 330 on the polished rod 312 is adjusted through screwing and unscrewing the fastening bolt during use, the other end of the first arm 331 is connected to one end of the second arm 332 through a rotational link 333, and the other end of the second cantilever 332 is connected with the catch 334, the displacement sensor 335 is movably clamped in the catch 334, the displacement of the test piece 5 under the pressure of the indenter is measured to reflect the elastic modulus of the test piece 5 under the pressure.

Preferably, in order to facilitate the connection between the first suspension arm 331 and the second suspension arm 332, the rotating connecting member 333 includes a limit bolt 3331, a first connecting member 3332 and a second connecting member 3333, the first connecting member 3332 and the second connecting member 3333 are both provided with through holes 3335, the through holes 3335 are respectively used for the first suspension arm 331 and the second suspension arm 332 to pass through, the limit bolt 3331 is provided on the first connecting member 3332 and is used in cooperation with the limit slots 3311 provided on the first suspension arm 331, when in use, the lower end of the limit bolt 3331 is clamped in different limit slots 3311 by rotating the limit bolt 3331, so as to adjust the relative distance between the first suspension arm 331 and the second suspension arm 332 to meet the test pieces 5 with different volume sizes, and when in use, the lower end of the first connecting member 3332 is provided with a plug-in connecting rod 3334, the plug-in connecting rod 3334 is connected with a universal ball 3337 embedded on the second connecting member 3333 by a plug shaft 3336, the first connecting piece 3332 and the second connecting piece 3333 are rotatably connected, so that when the device is used, the second connecting piece 3333 is rotated according to needs to adjust the relative angle between the first suspension arm 331 and the second suspension arm 332, the second connecting piece 3333 on one side of the universal ball 3337 is further provided with a clamping groove 33331, a universal ball limiting component 3338 is installed in the clamping groove 33331, and after the relative angle between the first suspension arm 331 and the second suspension arm 332 is adjusted, the second connecting piece 3333 is fixed by the universal ball limiting component 3338, so that unnecessary rotation is avoided, and the experimental accuracy is prevented from being influenced; the outer end of the second arm 332 is hinged to the latch 334, and the front end of the displacement sensor 335 is matched with the displacement measuring hole 511, that is, when in use, the tip of the displacement sensor 335 is pressed against the displacement measuring hole 511, so as to measure the deformation and the resilience of the test piece 5 during the pressing process.

Preferably, the universal ball limit assembly 3338 comprises an adjusting rod member 33381, a threaded sleeve 33382, a movable rod 33383 and a limit block 33384, wherein the threaded sleeve 33382 is clamped into one side of the universal ball 3337 through a clamping groove 33331 and is connected with the second connecting member 3333 through a limit disc and a limit nut 33386 so as to be fixed relative to the second connecting member 3333, the adjusting rod member 33381 is arranged on the outer side of the threaded sleeve 33382 and is in threaded connection with the threaded sleeve 33382, and the length of the adjusting rod member 33381 in the threaded sleeve 33382 is adjusted by rotating the adjusting rod member 33381; the activity cover of activity pole 33383 is established in threaded sleeve 33382, and uses with the cooperation of regulating lever piece 33381, still blocks on the section of cup jointing of activity pole 33383 and is equipped with reset spring 33385, is convenient for the activity pole 33383 resets when losing the restraint, the end and the stopper 33384 connection that activity pole 33383 stretches out threaded sleeve 33382 one end, stopper 33384 is the arc stopper, and for the increase and the universal ball 3337 between frictional force, is provided with the rubber pad in the inboard of stopper 33384.

Preferably, in order to ensure the stability of the connection, the lower end of the plug connection rod 3334 is provided with a first annular abutment groove 33341 and a first square plug block 33342, the first annular abutment groove 33341 is matched with a second annular convex ring 33371 arranged at the upper end of the universal ball 3337 for use, and the first square plug block 33342 is matched with a second square groove 33372 arranged at the upper end of the universal ball 3337 for use.

Preferably, the movable environment box 4 includes a movable environment box housing 41, a movable environment box sealing plate 42, a movable environment box inner container 43, a movable environment box handle 44, a left cover plate 45 and a right cover plate 45 on the movable environment box, a rear cover plate 46 on the movable environment box, a front cover plate 47 and a rear cover plate 47 under the movable environment box, a left cover plate 48 and a right cover plate 48 under the movable environment box, a universal wheel 49 and a movable environment box heat preservation door 410, the movable environment box sealing plate 42 is disposed on the inner side of the movable environment box housing 41 and used for sealing the space inside the movable environment box housing 41, and the left cover plate 45 on the movable environment box and the rear cover plate 46 on the movable environment box are both disposed on the movable environment box housing 41 and used for forming a sealed box structure.

The roadbed dynamic triaxial resilience modulus tester can realize dynamic automatic loading and static loading; the matched system supports various test types such as fatigue, breakage, creep and the like; the instrument has two loading modes of stress and strain; the user can select and match special test device as required, also can be used to the test such as bending of concrete is drawn, unipolar compression, creep resilience.

The roadbed dynamic triaxial resilience modulus tester provided by the invention has the main technical indexes and requirements that:

1. axial excitation maximum load: selecting 100KN, 200KN, 500KN, 1000KN and the like;

2. loading a load: better than +/-1%;

3. the load is divided into two and three gears, and the five gears are selected and matched (force value sensors);

4. deformation of the axial magnetic ring: 0-200 mm; precision: 0.001 mm;

5. deformation: the precision is 0.001mm to 20 mm;

6. speed: 0.01 mm/min-100 mm/min can be set arbitrarily;

7. loading speed: 0.01 KN/S-30 KN/S, and can be set arbitrarily (adjusted according to the measuring range of the force value sensor);

8. main test waveforms: selecting other waveforms such as sine wave, square wave, triangular wave, etc. (factory-matched standard sine wave);

9. test frequency: the 0.1 Hz-25 Hz can be set arbitrarily;

10. the loading force and the strain can be preset into 13 sections, and the number of the sections can be set at will

Maximum value KN/mm; minimum value KN/mm; setting randomly;

shutdown conditions: presetting times, force values, deformation, time and the like, and automatically stopping when preset conditions are reached;

11. sampling time interval setting range: 2mS to 1H;

12. amplitude range: 0.03mm to 1.2 mm;

13. total power voltage: 40KW/50 Hz; an oil pump 37 KW/380V; controlling 220V/3 KW;

14. stroke of the servo actuator: 0-200 mm +/-10 mm;

15. servo oil source pressure range: 0-21 MPa, and setting according to the measuring range of the force value sensor;

YH-10 (SH 0358-1995) aviation Hydraulic oil; summer 25 is recommended; no. 46 antiwear hydraulic oil in winter is replaced, and oil source continuous work 1500H needs to be replaced by oil;

17. the temperature of the working environment: 0-25 ℃;

18. an oil tank: 50L, 100L and 200L, and selecting and matching according to the force value;

19. continuous working time of oil source: the temperature is not more than 200H, and when the compressor works continuously, the water cooling and the oil temperature compressor are used for refrigerating and need to be started at the same time;

20. oil temperature protection alarm meter: 0-60 ℃; can be set freely, (45 ℃ is set after leaving factory)

21. The working pressure of the oil pump is 31.5MPa, the flow rate is 50ml/r, 60ml/r and 120ml/r (the user can select and match according to the force value);

22. the oil source has the functions of electric leakage and emergency stop protection;

23. measuring range of the main oil meter: 0-40 MPa; precision: 2.5 grade; the oil return meter is 0-1 Mpa;

24. high-pressure oil pipe: the highest working pressure is 34 Mpa;

25. sample size:

a cube: 100mm X400 mm

100mm×100mm×300mm

100mm×100mm×550mm

100mm×100mm×100mm

150mm×150mm×150mm

A round test piece: phi 100mm x 300mm

Φ150mm×400mm。

The invention relates to test software of a roadbed dynamic triaxial resilience modulus tester, which comprises the following steps:

the software is suitable for WIN98, WIN2000 and WINXP platform systems, is matched with a control system, can control tests to complete various dynamic and static mechanical property tests, is self-made into a system, is in high-speed data communication with the control system, can draw test curves required by the dynamic and static tests while controlling the test system to work, and can independently complete various test management, data storage, test report printing and other functions, and the detailed operation is described in software operation instructions.

The instrument of the roadbed dynamic triaxial resilience modulus tester controls and operates:

1. hydraulic servo pump station operation

Switching on a power supply, starting a main power supply, turning on an emergency unloading button, starting a power supply knob, then starting a refrigeration switch, setting an oil temperature control meter to 45 ℃, generally setting an oil temperature alarm meter to 45 ℃, starting an oil source by a starting key, starting a starting indicator lamp to light, operating the oil source for about 10 minutes, and adjusting a near force value corresponding to a pressure regulating knob according to the range of a pressed force value sensor by referring to an axial pressure calibration table; and (5) temporarily stopping the oil source in the middle of operation if necessary, and pressing a stop key.

2. Software controlled operation

And (3) detailing software use instructions (use instructions of an upper computer of the electro-hydraulic servo fatigue testing machine).

The invention discloses a roadbed dynamic triaxial resilience modulus tester, which comprises the following test operation steps:

1. connecting a servo oil source hydraulic oil temperature waterway cooling device, switching on a power supply, starting an oil source pump station for preheating, simultaneously starting a cooling water pipe water flow cooling circulation and an oil temperature cooling air conditioner, referring to a fatigue machine servo oil source axial pressure calibration table, and adjusting a pressure regulating knob to a pressure range required by a test;

2. the controller, the computer, the host, the displacement sensor and the force value sensor are connected according to the marks;

3. computer software communication

Starting a computer, opening a software interface, selecting a communication port, and flashing green to indicate that the software is communicated, wherein an icon at the upper right corner of the software interface is displayed;

4. selecting a test device required by the test, placing the test piece and the device together with a displacement deformation sensor on a host test bed, and enabling a pressure head of the clamp or the test device and the axis of a pressure head of the oil cylinder to be on the same axis;

5. selecting a fatigue (dynamic) test type by a software interface, establishing an engineering file according to test requirements, opening the engineering file, and setting relevant parameters such as a fatigue test waveform, frequency, a force value, sampling frequency and the like;

6. starting test: when the test type is breakage or creep, selecting the upper starting test in the software interface, namely the starting test, and when the test type is fatigue test, selecting the lower starting test, namely the starting test;

7. after the test is started, the software system controls the dynamic oil cylinder to descend, contact the test loading value and start the test, and simultaneously, the software automatically records and stores data and curve graphs in the test process in real time (the specific software operates and pays close attention to the use instruction of the fatigue machine software and the corresponding national standard specification).

The invention relates to the cautions of the roadbed dynamic triaxial resilience modulus tester during operation:

1. the instrument should be installed on stable basis, ground foundation bearing capacity: 3 times of the weight of the equipment;

2. the instrument should operate in an environment without vibration, corrosive media and strong magnetic interference;

3. cleaning the instrument in time after each test;

4. the hydraulic servo pump station is provided with an oil temperature overtemperature automatic protection device, and when the oil temperature reaches a preset temperature, an automatic alarm is sent to a shutdown protection instrument; if the oil has sediments, the oil filtering alarm lamp is on, the machine is automatically shut down to protect the instrument, an oil residue cleaning port is arranged after the oil source for treatment, the sealing is good after the treatment, and the oil leakage phenomenon cannot occur; if a short circuit exists, the emergency unloading lamp is on, the instrument is automatically stopped to protect the instrument, and a user does not need to be in panic and starts the machine again after the oil temperature drops; the factory oil temperature meter is set well, no non-professional person moves, the oil tank does not provide oil hydraulic oil when leaving the factory, and the oil temperature scale cannot be lower than 50 by checking the oil temperature scale when the oil hydraulic oil is added according to a seasonal self-distribution hydraulic oil test;

5. when the oil source pump station is closed, firstly removing pressure and then stopping shutdown;

6. adjusting the pressure of an oil source pump station: according to the measuring range of the selected force value sensor, the oil source pressure is adjusted by referring to the oil source axial pressure calibration meter, and the oil source pressure is not adjusted to be larger than the measuring range, so that the test error is avoided.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a road bed developments triaxial modulus of resilience tester which characterized in that: the oil source control system comprises a servo oil source control system (1), a high-pressure oil pipe (2) and a loading system (3), wherein the servo oil source control system (1) is connected with the loading system (3) through the high-pressure oil pipe (2);

the servo oil source control system (1) comprises an oil tank (125), a refrigerating machine (11) and an oil source water drum (121) which are arranged on the oil tank (125), wherein the refrigerating machine (11) and the oil source water drum (121) are respectively used for refrigerating and supplying water to the oil tank (125); an oil return port (119) and an oil outlet (120) are further formed in the oil tank (125), and the oil return port (119) and the oil outlet (120) are respectively connected with one end of the high-pressure oil pipe (2) to provide hydraulic power for the loading system (3);

the loading system (3) comprises a main pressure frame and a pressure actuating device, the pressure actuating device is arranged on the main pressure frame, the pressure actuating device is connected with the high-pressure oil pipe (2), pressure is applied to a sample (5) placed on the main pressure frame through the pressure actuating device, and the sample (5) is arranged on a tray of the main pressure frame through a sample fixing component.

2. The roadbed dynamic triaxial resilience modulus tester as claimed in claim 1, wherein: the main pressure frame comprises a main frame support (34), a hydraulic oil cylinder (37), a polished rod (312), a steel seat (313), an upper beam plate (314), a tray (324), a tray connecting seat (325) and a lower base (326), the main frame support (34) is of a trapezoidal frame structure, the hydraulic oil cylinder (37) is arranged on the main frame support (34) through an oil cylinder disassembling plate assembly, and a piston of the hydraulic oil cylinder (37) is connected with the upper beam plate (314) through the steel seat (313); the pressure actuating device is arranged on the upper beam plate (314), the tray (324) is arranged on a lower base (326) right below the pressure actuating device and is connected with the lower base (326) through a tray connecting seat (325); the polish rod (312) is arranged on the inner side of the hydraulic oil cylinder (37) at the corresponding position, the upper end of the polish rod (312) penetrates through the upper beam plate (314) and is movably connected with the upper beam plate (314), and the lower end of the polish rod (312) is connected with the lower base (326) through a nut (329).

3. The roadbed dynamic triaxial resilience modulus tester of claim 2, wherein: the oil cylinder disassembling plate assembly comprises a first lifting oil cylinder base disassembling plate (32) and a second lifting oil cylinder base disassembling plate (33), the first lifting oil cylinder base disassembling plate (32) is welded on a host bracket (34) in an equilateral triangle shape, the second lifting oil cylinder base disassembling plate (33) is welded with the first lifting oil cylinder base disassembling plate (32), and a base of the hydraulic oil cylinder (37) is located on the second lifting oil cylinder base disassembling plate (33); the lower base (326) is also provided with a first lifting cylinder clamping plate (327) and a second lifting cylinder clamping plate (328) which are matched with each other for use, and the hydraulic oil cylinder (37) is fixed.

4. The roadbed dynamic triaxial resilience modulus tester of claim 2, wherein: the upper beam plate (314) is an equiangular triangular steel plate, a steel shaft penetrating hole (3141), a polished rod penetrating hole (3142) and a bolt fastening hole (3143) are formed in the upper beam plate (314), the steel shaft penetrating hole (3141) is formed in the center of mass of the upper beam plate (314) and is matched with a pressure actuating device for use, the polished rod penetrating holes (3142) are formed in three corners of the upper beam plate (314) and are matched with the polished rod (312) for use, and the bolt fastening hole (3143) is formed in the outer side of the polished rod penetrating hole (3142) and is matched with a steel base (313) for use.

5. The roadbed dynamic triaxial resilience modulus tester of claim 4, wherein: the pressure actuating device comprises a jet pipe type electro-hydraulic servo valve (317), a double-acting hollow jack (318), a connecting piece (319), a sensor connecting shaft (320), a connecting seat (321), a tension-compression type sensor (322), a sensor connecting rod (323) and a pressure head (336), the double-acting hollow jack (318) is fixed on the upper beam plate (314), the jet pipe type electro-hydraulic servo valve (317) is arranged at the tail end of the double-acting hollow jack (318), and the jet pipe type electro-hydraulic servo valve (317) is connected with the high-pressure oil pipe (2), one end of the connecting piece (319) passes through the steel shaft through hole (3141) to be connected with the piston end of the double-acting hollow jack (318), the other end is connected with the connecting seat (321) through the sensor connecting shaft (320), and a pull-press type sensor (322) is arranged on the sensor connecting shaft (320), the connecting seat (321) is connected with the pressure head (336) through a sensor connecting rod (323).

6. The roadbed dynamic triaxial resilience modulus tester of claim 2, wherein: the fixed subassembly of sample include top board (51), holding down plate (52) and connecting rod (53), sample (5) set up between top board (51) and holding down plate (52), top board (51) are connected through connecting rod (53) with holding down plate (52), and be provided with displacement survey hole (511) on top board (51), displacement survey hole (511) and the modulus of resilience test subassembly cooperation use of setting on polished rod (312).

7. The roadbed dynamic triaxial resilience modulus tester of claim 6, wherein: the resilience modulus test assembly comprises a locking buckle (330), a first cantilever (331), a second cantilever (332) and a displacement sensor (335), wherein the locking buckle (330) is arranged at one end of the first cantilever (331), the movable clamp is clamped on the polish rod (312), the other end of the first cantilever (331) is connected with one end of the second cantilever (332) through a rotating connecting piece (333), the other end of the second cantilever (332) is connected with a clamping piece (334), and the displacement sensor (335) is movably clamped in the clamping piece (334).

8. The roadbed dynamic triaxial resilience modulus tester of claim 7, wherein: the rotary connecting piece (333) comprises a limiting bolt (3331), a first connecting piece (3332) and a second connecting piece (3333), wherein the first connecting piece (3332) and the second connecting piece (3333) are respectively provided with a through hole (3335), the through holes (3335) are respectively used for a first cantilever (331) and a second cantilever (332) to pass through, and the limiting bolt (3331) is arranged on the first connecting piece (3332) and is matched with a limiting clamping groove (3311) arranged on the first cantilever (331) for use; the outer end of the second cantilever (332) is hinged with the clip (334), and the front end of the displacement sensor (335) is matched with the displacement measuring hole (511).

9. The roadbed dynamic triaxial resilience modulus tester of claim 8, wherein: the lower end of the first connecting piece (3332) is provided with a plug connecting rod (3334), the plug connecting rod (3334) is connected with a universal ball (3337) embedded on the second connecting piece (3333) through a bolt shaft (3336), and a clamping groove (33331) is arranged on the second connecting piece (3333) at one side of the universal ball (3337), a universal ball limiting component (3338) is arranged in the clamping groove (33331), the universal ball limiting component (3338) comprises an adjusting rod piece (33381), a threaded sleeve (33382), a movable rod (33383) and a limiting block (33384), the threaded sleeve (33382) is clamped into one side of the universal ball (3337) through a clamping groove (33331), and is connected with a second connecting piece (3333) through a limit disc and a limit nut (33386), the adjusting rod piece (33381) is arranged on the outer side of the threaded sleeve (33382) and is in threaded connection with the threaded sleeve (33382); activity pole (33383) activity cover is established in threaded sleeve (33382), and cup joints the section card at it and is equipped with reset spring (33385), the end that activity pole (33383) stretched out threaded sleeve (33382) one end is connected with stopper (33384), stopper (33384) are the arc stopper, and are provided with the rubber pad in the inboard of stopper (33384).

10. The roadbed dynamic triaxial resilience modulus tester of claim 9, wherein: the lower extreme of grafting connecting rod (3334) be provided with first annular butt joint groove (33341) and first square plug-in block (33342), first annular butt joint groove (33341) and the cooperation of setting up second annular bulge loop (33371) in universal ball (3337) upper end use, first square plug-in block (33342) and the cooperation of setting up second square draw-in groove (33372) in universal ball (3337) upper end use.

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