CN102012338A - Composite flexible uniform pressure loading device suitable for geomechanical model test - Google Patents

Composite flexible uniform pressure loading device suitable for geomechanical model test Download PDF

Info

Publication number
CN102012338A
CN102012338A CN 201010589495 CN201010589495A CN102012338A CN 102012338 A CN102012338 A CN 102012338A CN 201010589495 CN201010589495 CN 201010589495 CN 201010589495 A CN201010589495 A CN 201010589495A CN 102012338 A CN102012338 A CN 102012338A
Authority
CN
China
Prior art keywords
loading
flexible
thruster
hydraulic jack
oil cylinder
Prior art date
Application number
CN 201010589495
Other languages
Chinese (zh)
Other versions
CN102012338B (en
Inventor
李术才
王汉鹏
张庆松
王�琦
李为腾
李智
Original Assignee
山东大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 山东大学 filed Critical 山东大学
Priority to CN2010105894958A priority Critical patent/CN102012338B/en
Publication of CN102012338A publication Critical patent/CN102012338A/en
Application granted granted Critical
Publication of CN102012338B publication Critical patent/CN102012338B/en

Links

Abstract

The invention relates to a composite flexible uniform pressure loading device suitable for a geomechanical model test. The device comprises a hydraulic oil cylinder thruster, wherein the upper end of the hydraulic oil cylinder thruster is connected with a hydraulic oil cylinder through a spherical hinge; and a composite flexible power transfer cushion layer is arranged at the bottom of the hydraulic oil cylinder thruster. The device can be widely applied to surface loading of various geomechanical model tests, has a simple structure, is flexible to assemble and convenient to operate and ensures rational size of a single loading unit; the hydraulic oil cylinder is a two-way oil cylinder with an oil inlet and an oil outlet; loading and unloading can be realized by matching a hydraulic station with a hydraulic automatic control system; meanwhile, a plurality of loading devices can be combined in different arrangement modes to realize gradient loading. In the device, the hydraulic oil cylinder, the spherical hinge, the thruster and the composite flexible power transfer cushion layer are organically combined, and the device has better uniform loading effect. An oil cylinder front loading flange can be fixed on a counterforce frame and a steel plate is penetrated by a piston rod to provide power, so the loading space is compressed, materials are saved and high adaptability is ensured.

Description

Be applicable to the flexible well-distributed pressure charger of combined type of geomechanical model test
Technical field
The present invention relates to a kind of charger, especially a kind of flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test.
Background technology
Geomechanical model test helps outstanding principal contradiction in the process of the test of complexity, is convenient to hold, find the inner link of phenomenon.Abroad, started engineering geomechanics model test technology with the expert headed by the not graceful Green at Italian structural model test.Subsequently, states such as the U.S., Germany, France, Britain and Japan have also carried out a large amount of model investigations.At home, numerous scientific research institutions such as Tsing-Hua University, three of Headquarters of the General Staff engineer scientific researches, Shandong University have successively carried out geomechanical model test research to domestic many heavy construction projects.
The model boundary loading technique is a key technology in the geomechanical model test, because it is directly connected to model boundary and loads effect and precision, model test is loaded terrestrial stress can real simulation engineering actual forced status play crucial effects, also directly influence the degree of uniformity of formed stress (strain) field in the model body and the authenticity of experimental result.Be warranty test accuracy as a result, the test loading environment of the original terrestrial stress of real simulation is particularly important, therefore, guarantees to produce the uniform stress field in the model, and the scope and the degree of depth that reduce the model surface non-uniform stress field very important to the model test result as far as possible.
From existing model loading technique, the model surface load apply the three kinds of modes that mainly contain:
(1) hydraulic jack loads by the rigidity thruster, and the rigidity thruster can be triangle and divides cloth or trapezoidal profile piece.This method has characteristics such as the load of loading is big, stroke is big, handy, but on-load pressure homogeneity deviation is bigger, causes model internal strain field uniformity very poor, is difficult to reflect strictly according to the facts the engineering stress.Special because the excavation of the middle cavern of model, cause the model boundary distortion inevitable inhomogeneous, this method loads and makes that the unevenness of boundary load is more obvious, also is unfavorable for simultaneously solving loading the synchronous of pressure head and border transversely deforming, so the model boundary loading accuracy is low.
(2) adopt traditional hydraulic rubber capsule to load, can realize the flexible of model surface evenly loaded, particularly when model surface produces nonaffine deformation, still can evenly load.But because the loading load intensity is on the low side, stroke is little, can't satisfy the requirement of model moderate finite deformation and higher-strength, does not reach the heavily stressed loading requirement of deep mining test; Moreover it makes trouble, and serviceable life is short, generally can only satisfy the single test needs.
(3) above dual mode also can solve some engineering problems under the less demanding situation of test accuracy.Along with the expansion gradually of project scale, precision prescribed improves constantly, and these two kinds of load mode exposed day by day go out the drawback of its existence.For addressing the above problem, Headquarters of the General Staff engineer scientific research three is designed piston type well-distributed pressure loader (ZL 02213775.0), both can add evenly load on model, has solved again that flexible force transmission evenly loads a difficult problem in the model test.But piston type well-distributed pressure loader structure more complicated, processing and manufacturing accuracy requirement height, price is also higher relatively.
The model test loading system of the above-mentioned unit of analysis-by-synthesis mainly has the following disadvantages:
1. the rigidity loading system that most loading systems in fact all are hydraulic jack+thrusters, the load deviation is bigger, causes that easily stress is concentrated, can not reach the equally distributed purpose of model surface load.
2. the hydraulic pressure capsule loads owing to have shortcomings such as stroke is little, easy oil leakage, poor durability, the wiring that can only unidirectionally load, is difficult for to bore a hole thereon, can't satisfy the needs of large-scale model test.
3. piston type well-distributed pressure loader complex structure is on the high side, also is unfavorable for burying underground in the model drawing of survey line.
4. most oil cylinder load modes are the form of oil cylinder+thruster, need to reserve bigger loading space, for loading space condition of limited bad adaptability.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of uniform loading performance height, the flexible well-distributed pressure charger of the assembling combined type that is applicable to geomechanical model test flexible, simple to operate, good endurance are provided.
For achieving the above object, the present invention adopts following technical proposals:
A kind of flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test, it is characterized in that: comprise the hydraulic jack thruster, hydraulic jack thruster upper end links to each other with hydraulic jack by ball pivot, and hydraulic jack thruster bottom is provided with combined type flexible force transmission bed course.
Described hydraulic jack thruster comprises upper plate and lower plate, connects by some uniform ribbed stiffeners between the upper and lower plate, and ribbed stiffener is trapezoidal; Upper plate is provided with the ball pivot draw-in groove, and lower plate is a fluted body.
The top land of described hydraulic jack is connected with ball pivot, and ball pivot is stuck in the ball pivot draw-in groove of upper plate, and hydraulic jack front end or rear end are provided with flange, and flange is provided with bolt hole.
Be provided with combined type flexible force transmission bed course in the fluted body lower plate of described hydraulic jack thruster, combined type flexible force transmission bed course is fixed on the lower plate by superpower viscose.
Described combined type flexible force transmission bed course is made up of the urethane rubber of two-layer different shore hardnesses, inside is the super flexible polyurethane rubber slab of shore hardness 10 degree, thick 35mm, the outside is the flexible polyurethane rubber slab of shore hardness 30 degree, thickness is 15mm, is provided with warp and weft in the flexible polyurethane rubber slab.
The super flexible polyurethane rubber slab in inside of the present invention is very soft, uniform loading plays key effect for load, comprise one deck warp and weft in the outside flexible polyurethane rubber slab, can bear high pressure, and the down inner super flexible rubber layer of restriction condition of high voltage is out of shape excessive phenomenon above 5MPa.
The peak load that this loading system can apply is 50t, and the accessible peak load intensity of model surface is 4.5MPa, load intensity deviation≤5%, and the even degree of depth of model surface unbalanced stress is less than 100mm.The present invention can give model surface flexible evenly loading, improves loading accuracy greatly, can be widely used in various geomechanical model tests and load.
The present invention has the following advantages:
1. this device can be realized the flexible well-distributed pressure of model surface is loaded, combined type flexible force transmission bed course superior performance, and the load intensity that applies is big, can reach 4.5MPa, and the load intensity deviation is lower than 5%, and the even degree of depth of model surface unbalanced stress is less than 100mm.
2. cooperate Hydraulic Station and hydraulic pressure automatic control system, the original stress condition of model engineering geology preferably, the accurate control of implementation model surface stress loads deviation ± 0.1MPa.
3. this device assembling is flexible, and easy to operate, single loading unit size is reasonable, can process the loading unit of different size as required; Can carry out simultaneously different arrangement mode combinations, realize that gradient loads.
4. hydraulic jack, ball pivot, thruster, combined type flexible force transmission bed course are organically merged, by the adjustment of ball pivot, the loading direction of thruster can be according to the vergence direction adjustment of model surface, uniform loading better effects if.
5. the load cylinder forward flange can be fixed on the reaction frame, pass steel plate by piston rod and exert oneself, compress the loading space, save material, adaptability is stronger.Also can easily charger be installed on the model reaction frame by rear flange.
6. a whole set of charger is simple in structure, easy to process, for ease of maintenaince, realizes accurately control load easily, and long service life, and the survey line in the model is drawn in perforation easily.
Description of drawings
Fig. 1 is a cross-sectional view of the present invention;
Fig. 2 is a vertical view of the present invention;
Wherein: 1, super flexible rubber layer, 2, upper plate, 3, the ball pivot draw-in groove, 4, bolt hole, 5 oil-outs, 6, hydraulic jack, 7, oil-in, 8, the flexible rubber layer, 9, lower plate, 10, ribbed stiffener, 11, ball pivot, 12, flange, 13, oil cylinder piston, 14, O-ring seal, 15, the hydraulic jack thruster, 16, combined type flexible force transmission bed course.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
As shown in Figure 1 and Figure 2, the present invention is a kind of flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test, comprise hydraulic jack 6, ball pivot 11, hydraulic jack thruster 15 and flexible force transmission bed course 16, hydraulic jack thruster 15 upper ends connect hydraulic jack 6 by ball pivot 11, and the bottom is provided with a layer composite flexible force transmission bed course 16.
Hydraulic jack thruster 15 comprises upper plate 2 and lower plate 9, and lower plate 9 is a fluted body, connects by some uniform ribbed stiffeners 10 between the upper and lower plate, and ribbed stiffener 10 is trapezoidal; Upper plate 2 tops are provided with ball pivot draw-in groove 3, hydraulic jack thruster 15 links to each other with the ball pivot 11 of oil cylinder piston 13 ends of hydraulic jack 6 by ball pivot draw-in groove 3, thruster and hydraulic cylinder piston linked together when this connected mode guaranteed not load, and guaranteed that thruster is fine-tuning when loading simultaneously again.
Be provided with combined type flexible force transmission bed course 16 in the fluted body lower plate 2 of hydraulic jack thruster, combined type flexible force transmission bed course 16 is fixed on the lower plate 2 by superpower viscose.Combined type flexible force transmission bed course 16 comprises super flexible rubber layer 1 of the internal layer that is arranged in hydraulic jack thruster 15 bottom lower plates 9 grooves and outside flexible rubber layer 8, be provided with one deck warp and weft in the flexible rubber layer 8, can limit the excessive phenomenon of super flexible rubber layer 1 distortion under the condition of high voltage.Super flexible rubber layer 1 is the super flexible polyurethane rubber slab of shore hardness 10 degree, thick 35mm.Flexible rubber layer 8 is the flexible polyurethane rubber slab of shore hardness 30 degree, and thickness is 15mm.
Be provided with O-ring seal 14 between the oil cylinder piston 13 of hydraulic jack 6 and the cylinder body, prevent the hydraulic oil seepage.The front and back end of cylinder body is respectively equipped with oil-in 7 and oil-out 5.Hydraulic jack 6 front ends or rear end are provided with flange 12, and flange 12 is provided with bolt hole 4.
Principle of work of the present invention: cooperate Hydraulic Station and hydraulic pressure automatic control system, hydraulic pressure automatic controlling system hydraulic oil enters hydraulic jack bottom cavity shown in Figure 1 by oil-in 7, increase along with pressure, hydraulic oil in the upper chamber is discharged cavity by oil outlet 5, oil cylinder piston 13 is pushed ahead thereupon, and be delivered on the combined type flexible force transmission bed course of forming by super flexible rubber layer 1 and rubber restraint layer 8 16 by ball pivot 11 and hydraulic jack thruster 15, ball pivot 11 can be finely tuned loading direction according to the inclined degree of model surface, by combined type flexible force transmission bed course 16 force transmission is given at last to load object.Adjust loading system by the pressure of regulating turnover oil and act on pressure on the object.
The peak load that this loading system can apply is 50t, and the accessible peak load intensity of model surface is 4.5MPa, load intensity deviation≤5%, and the even degree of depth of model surface unbalanced stress is less than 100mm.The present invention can be widely used in various geomechanical model tests and load.

Claims (5)

1. flexible well-distributed pressure charger of the combined type that is applicable to geomechanical model test, it is characterized in that: comprise the hydraulic jack thruster, hydraulic jack thruster upper end links to each other with hydraulic jack by ball pivot, and hydraulic jack thruster bottom is provided with combined type flexible force transmission bed course.
2. the flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test according to claim 1, it is characterized in that: described hydraulic jack thruster comprises upper plate and lower plate, connect by some uniform ribbed stiffeners between the upper and lower plate, ribbed stiffener is trapezoidal; Upper plate is provided with the ball pivot draw-in groove, and lower plate is a fluted body.
3. the flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test according to claim 1, it is characterized in that: the top land of described hydraulic jack is connected with ball pivot, ball pivot is stuck in the ball pivot draw-in groove of upper plate, hydraulic jack front end or rear end are provided with flange, and flange is provided with bolt hole.
4. the flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test according to claim 2, it is characterized in that: be provided with combined type flexible force transmission bed course in the fluted body lower plate of described hydraulic jack thruster, combined type flexible force transmission bed course is fixed on the lower plate by superpower viscose.
5. the flexible well-distributed pressure charger of combined type that is applicable to geomechanical model test according to claim 4, it is characterized in that: described combined type flexible force transmission bed course is made up of the urethane rubber of two-layer different shore hardnesses, inside is the super flexible polyurethane rubber slab of shore hardness 10 degree, thick 35mm, the outside is the flexible polyurethane rubber slab of shore hardness 30 degree, thickness is 15mm, is provided with warp and weft in the flexible polyurethane rubber slab.
CN2010105894958A 2010-12-15 2010-12-15 Composite flexible uniform pressure loading device suitable for geomechanical model test CN102012338B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105894958A CN102012338B (en) 2010-12-15 2010-12-15 Composite flexible uniform pressure loading device suitable for geomechanical model test

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105894958A CN102012338B (en) 2010-12-15 2010-12-15 Composite flexible uniform pressure loading device suitable for geomechanical model test

Publications (2)

Publication Number Publication Date
CN102012338A true CN102012338A (en) 2011-04-13
CN102012338B CN102012338B (en) 2012-03-28

Family

ID=43842582

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105894958A CN102012338B (en) 2010-12-15 2010-12-15 Composite flexible uniform pressure loading device suitable for geomechanical model test

Country Status (1)

Country Link
CN (1) CN102012338B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182729A2 (en) * 2012-06-06 2013-12-12 Universidad De Granada Testing device and method for the characterization of materials in the event of cracking phenomena
CN103837416A (en) * 2014-03-18 2014-06-04 中国人民解放军理工大学 Loading and unloading test device for simulating stress state of deep rock mass

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777003A (en) * 1985-07-30 1988-10-11 Cheboxarsky Elektromekhanichesky Zavod Method of producing plain bearing shell with shock-absorbing anti-friction coating
CN1159782A (en) * 1994-08-01 1997-09-17 联合工艺公司 Method and apparatus for forming airfoil structure
WO2002023079A1 (en) * 2000-09-18 2002-03-21 Atp S.R.L. Supporting platform in which a concentrated load is uniformly distributed
CN201049635Y (en) * 2007-06-22 2008-04-23 姜海军 Auxiliary wheel for mono-track vehicle
CN201885925U (en) * 2010-12-15 2011-06-29 山东大学 Compound flexible uniformly-distributed pressure loading device applicable to geomechnical model test

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777003A (en) * 1985-07-30 1988-10-11 Cheboxarsky Elektromekhanichesky Zavod Method of producing plain bearing shell with shock-absorbing anti-friction coating
CN1159782A (en) * 1994-08-01 1997-09-17 联合工艺公司 Method and apparatus for forming airfoil structure
WO2002023079A1 (en) * 2000-09-18 2002-03-21 Atp S.R.L. Supporting platform in which a concentrated load is uniformly distributed
CN201049635Y (en) * 2007-06-22 2008-04-23 姜海军 Auxiliary wheel for mono-track vehicle
CN201885925U (en) * 2010-12-15 2011-06-29 山东大学 Compound flexible uniformly-distributed pressure loading device applicable to geomechnical model test

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182729A2 (en) * 2012-06-06 2013-12-12 Universidad De Granada Testing device and method for the characterization of materials in the event of cracking phenomena
WO2013182729A3 (en) * 2012-06-06 2014-02-27 Universidad De Granada Testing device and method for the characterization of materials in the event of cracking phenomena
ES2482540A1 (en) * 2012-06-06 2014-08-04 Universidad De Granada Testing device and method for the characterization of materials in the event of cracking phenomena
CN103837416A (en) * 2014-03-18 2014-06-04 中国人民解放军理工大学 Loading and unloading test device for simulating stress state of deep rock mass
CN103837416B (en) * 2014-03-18 2015-12-23 中国人民解放军理工大学 That simulates deep rock mass stress state adds unloading test device

Also Published As

Publication number Publication date
CN102012338B (en) 2012-03-28

Similar Documents

Publication Publication Date Title
CN103243819B (en) Assembly concrete post-girder steel energy-dissipating type nodal connection device
CN105209768B (en) Lightweight supporting structure, the method for manufacturing lightweight supporting structure, composite sandwich panel and the method for manufacturing composite sandwich panel
CN101285808B (en) High crustal stress genuine three-dimensional load model trial system
CN105738216B (en) For tunnel gushing water model assay systems and its method under high-ground stress-hypertonic pressure
CN103790895B (en) Hydraulic cylinder side force assay device
DE112010003218T5 (en) Wind or tide turbine blade with a mounting arrangement
CN204008645U (en) A kind of terrestrial stress charger that is applicable to slip casting model test
CN101344445B (en) Self-balancing type true three-dimensional loading model testing bench frame with sliding wall
CN100586794C (en) Overhang spindle bumper absorber for airliner undercart
CN103437445B (en) Vibration-isolating and noise-reducing rubber support for buildings
CN205780149U (en) A kind of floating box connector
CN103287588A (en) High-carrying-capacity embedded frame composite material structural slab
CN102107240B (en) Simple tube hydro-bulging device and bulging method
CN101235661A (en) Carbon fiber-reinforced plastic steel reinforced-steel tube concrete combination column
CN205545092U (en) Self -adaptation adjusting device of photovoltaic mounting system
CN103292047B (en) A kind of Multifunctional pipeline support structure
CA2485455A1 (en) Hydraulic retention system for reciprocating pump cylinder liner
CN102514708B (en) Integral central wing box made of composite materials
CN105625159B (en) A kind of water pocket air bag combined type pontoon bridge
CN209535506U (en) A kind of non-firer driving divides valve nut type tripper
CN203739853U (en) Battery replacement device
CN102140801A (en) Cofferdam construction method in construction of deepwater pier bearing platform
CN104297058B (en) A kind of fretting fatigue testing test specimen clamping and charger
CN101974947B (en) H-shaped section fabricated buckling-restrained brace component
CN105655509A (en) Lower box body and battery box including lower box body

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120328

Termination date: 20151215