CN109682691A - A kind of borehole wall and enclose soil contact face shearing test equipment - Google Patents
A kind of borehole wall and enclose soil contact face shearing test equipment Download PDFInfo
- Publication number
- CN109682691A CN109682691A CN201910088463.0A CN201910088463A CN109682691A CN 109682691 A CN109682691 A CN 109682691A CN 201910088463 A CN201910088463 A CN 201910088463A CN 109682691 A CN109682691 A CN 109682691A
- Authority
- CN
- China
- Prior art keywords
- gear
- steel sheet
- elastic steel
- cover board
- bottom plate
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Landscapes
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to technical field of civil engineering, specifically a kind of borehole wall and soil contact face shearing test equipment, including bottom plate and cover board are enclosed, be fixedly linked between bottom plate and cover board by one group of support column, bottom plate upper center is equipped with film case；Film case includes rubber membrane cylinder, backing board and capping, and backing board is arranged in rubber membrane cylinder lower end and blocks the lower port of rubber membrane cylinder, and capping is used for the upper port of seal rubber film cylinder；Radial pressurizing device is arranged in rubber membrane cylinder periphery, and radial pressurizing device includes the elastic steel sheet of one group of arc being arranged in a ring；The virtual circular diameter that its inner ring that one group of elastic steel sheet rotation and mutual extrusion make is formed reduces, to apply radial pressure to rubber membrane cylinder.The present invention is able to solve its nonsynchronous problem of radial all directions compression when carrying out radial pressure to film cylinder.
Description
Technical field
The present invention relates to technical field of civil engineering, specifically a kind of borehole wall is set with soil contact face shearing test is enclosed
It is standby.
Background technique
The pit shaft in East China (and our province forever summer) mining area all passes through the 4th thicker system (with third system) topsoil, and thickness is big
Mostly in 100 ~ 380m, topsoil bottom, which is frequently located in the coal measure strata that underlies, to be had hydraulic connection and feeds insufficient gravel, coarse sand etc.
Artesian aquifer, water-bearing layer top are generally covered with thicker weak permeable or intimate fluid-tight argillic horizon.The exploitation of coal mine is living
Dynamic to cause letting out under water for bottom aquifer, aqueous layer soil body hydrostatic balance is destroyed, and is generated consolidation compression and is caused earthing body whole
Body sinks.What the vertical displacement and surrounding soil consolidation settlement that the soil body occurs in sinking watching due to borehole wall stress were displaced
Asynchronism causes generating downward vertical additional force because contacting friction on borehole wall outer surface.The existing borehole wall in China is set
Meter method thinks the horizontal hydraulic pressure of borehole wall receiving and soil pressure effect, and 3/4ths of borehole wall self weight are undertaken by stratum, and are in fact existed
In Thick Surface Soils, when there are water drainage settled ground, stratum cannot not only undertake most borehole wall self weight, instead to the borehole wall
A downward vertical additional force is generated, does not also consider this power because not recognizing in design, additional force acts on from top to bottom the borehole wall
After accumulating certain magnitude, concrete walling cannot bear huge vertical additional force and destroy, since 1987, China East China
The shaft of vertical well of freezing process and wellbore construction is used in mining area (including our province summer mining area forever) in thick surface soil, successively there is 100
Remaining a generation borehole wall cross fracture disaster has seriously affected the normal production of mine, or even has caused safety accident, causes huge
Economic loss.It is predicted that the rupture of a few years from now on borehole wall will be up to as many as 150.
Due to being not recognize vertical add in pervious design theory the main reason for shaft wall fracture in Thick Surface Soils
The presence of power, and vertical additional force suffered by the borehole wall does not have suitable formula that can use at present, is designing so as to cause the borehole wall
Stress load cannot be correctly determined in calculating process, there are certain theoretical defects for Shaft wall design.Bottom aquifer water drainage
The control that shaft wall fracture caused by settling is interacted by the borehole wall and surrounding soil, the determination of INTERFACE MODEL are to solve shaft wall fracture
Important technical it is crucial.Carry out the shearing test research of the borehole wall and soil body contact surface for above-mentioned key foundation problem, establishes deep
The reasonable expression formula of borehole wall vertical additional force (shearing force) in thick surface soil, to calculate borehole wall force analysis, deformation, rupture in advance
It surveys and the design of new type of shaft structure form calculates and provides basis.This is to the safe and reliable or preventing treatment for guaranteeing the newly-built borehole wall
Rupture occurs again for the borehole wall afterwards has highly important theory significance and engineering application value, can especially mine in China's superficial part
Charcoal resource rapidly depletes, east (in) Shandong Jibei, the Juye mining area of portion area focus development, Henan table mountain and Dengfeng mining area etc.
Under the situation that pit shaft quantity quicklys increase in ground thickness alluvium, research significance and application value are more prominent.For soil with
The test apparatus equipment of borehole wall contact surface frictional resistance focuses mostly in traditional staight scissors or simple shear apparatus, this instrument selection concrete
Contact surface is mostly plane, and entire contact surface uniform force and Practical Project have relatively large deviation.
Also occur the experimental rig of some pile-soil interfaces shearing mechanical characteristics in the prior art, such as application No. is
201810589024.3 a Chinese patent disclose a kind of pile-soil interface shearing dynamic characteristic test apparatus, including support
Device, pressure apparatus, film case and thrust device；Support device includes bottom plate, top plate, supporting beam and Duo Gen support column, bottom plate and
The through-hole for the insertion of stake sample is equipped on top plate；Pressure apparatus includes vertical loading device and transmission rod, vertical load dress
It sets and vertical pressure is applied on a sample by transmission rod；Film case includes film cylinder, porous disc and capping, and film cylinder is set in stake examination
The radial outside of sample has the accommodating cavity of accommodating soil sample between film cylinder and stake sample；Thrust device is set on film cylinder, and is mentioned
For squeezing along the thrust perpendicular to stake sample axially direction the soil sample in film case.
For the device when carrying out radial pressure to film cylinder, multiple transmission rods, which cannot synchronize, presses to film cylinder, so that native
Sample is pressurized unevenly, influences the objectivity of test data.
Summary of the invention
In order to make up for the deficiencies of the prior art, a kind of borehole wall proposed by the present invention and soil contact face shearing test equipment is enclosed,
With solution when carrying out radial pressure to film cylinder, the nonsynchronous problem of radial all directions compression.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of borehole wall of the present invention and enclose soil contact face shearing test equipment, including bottom plate and cover board, bottom plate and the lid
It is fixedly linked between plate by one group of support column, the support column is at least arranged three, and the upper end and cover board bottom of support column are solid
Fixed connection, support column lower end is through bottom plate and forms supporting leg；
Mounting hole is equipped in the middle part of the cover board, be cooperatively connected a step disk in the mounting hole, and step disk is fastened by its step
It is fixedly mounted on the cover board in the middle part of cover board and through fastening bolt；Step disk upper end is fixedly connected with servo hydraulic machine, watches
Hydraulic press down-pressed pole lower end is taken through step disk and is in contact with well top end, is set on the end face that down-pressed pole is used to contact with well column
There is displacement sensor, displacement sensor is connected with pressure sensor, and pressure sensor is folded in displacement sensor and well column
Between；In the structure, vertical pressure is applied on well column by servo hydraulic machine by down-pressed pole；Displacement sensor is for detecting well
The displacement of column, pressure sensor is for incuding servo hydraulic machine to well column pressure applied, using in the prior art at this
Routine test means do not do tired state herein；
The bottom plate upper center is equipped with step groove, and through hole, the step groove upper-end contact connection is arranged in the middle part of step groove
The upper end of the lower end of film case, film case is compressed by step disk；The film case includes circular rubber membrane cylinder, backing board and capping,
The backing board is arranged in rubber membrane cylinder lower end and blocks the lower port of rubber membrane cylinder, and capping is used for seal rubber film cylinder
Upper port；Rubber membrane cylinder is used to be set in the radial outside of well column, and when well column is plugged in film case, rubber membrane cylinder and well
There is the accommodating cavity of accommodating soil sample between column；
Radial pressurizing device is arranged in rubber membrane cylinder periphery, and the radial direction pressurizing device includes one group of arc being arranged in a ring
Elastic steel sheet, elastic steel sheet is at least arranged three, one end of each elastic steel sheet pass through shaft be rotatably installed in bottom plate and
Between cover board, the other end of each elastic steel sheet presses touching in its adjacent another elastic steel sheet intrados；In each Elastic Steel
Piece lateral surface is respectively provided with tooth socket, and be slidably installed trapezoid block on the upside of bottom plate, and tooth socket setting teeth, institute are corresponded on the inclined-plane of trapezoid block
The glide direction for stating trapezoid block is the tangential direction for the imaginary circles that this group of elastic steel sheet is formed, and trapezoid block is slided for making Elastic Steel
Piece rotates and its pressure touching is promoted to slide in one end of another elastic steel sheet intrados along intrados；One group of elastic steel sheet rotation and phase
The virtual circular diameter that its inner ring that mutually squeezing makes is formed reduces, to apply radial pressure to rubber membrane cylinder.
Preferably, inclined surface is arranged in the touching of elastic steel sheet pressure on the inside of one end of another elastic steel sheet intrados, and at the end
End rounding angle；So that elastic steel sheet end is convenient for sliding from rubber membrane cylinder surface, consequently facilitating uniformly applying to rubber membrane cylinder
Radial pressure.
Preferably, each trapezoid block side is fixedly connected with a rack gear, and its corresponding branch is run through in each rack gear one end
Fagging is simultaneously slidably connected with support plate, and the support plate is fixedly mounted between bottom plate and cover board；The rack gear and first gear
It is meshed, first gear is rotatably installed between bottom plate and cover board, and first gear rotation drives trapezoid block along one group by rack gear
The tangential direction sliding for the imaginary circles that elastic steel sheet is formed.Trapezoid block stirs elastic steel sheet and moves through the oblique of trapezoid block setting
Face presses to elastic steel sheet, and the imaginary circles center of circle is mobile, which is extruded in one end of next arc spring lamination intrados
It is pressurized and slides, thus it is synchronous to center of circle movement and contraction by multiple elastic steel sheets mutually restricted, so that one group of Elastic Steel
The imaginary circles uniform diameter that piece inner ring is formed reduces, so that soil sample is pressurized uniformly, avoids the generation of side pressure.
Preferably, the shaft of each first gear runs through cover board and end is fixedly connected with a driving gear on it,
Each driving gear, which engages, to be connected on the inside of ring gear, and the ring gear is rotatably installed on the upside of cover board.
Preferably, the shaft upper end of one of driving gear is fixedly and coaxially connected with servo motor output shaft, described to watch
Motor is taken to be fixedly mounted on the upside of cover board by L bracket.Servo motor rotates and keeps torque, so that ring gear driving driving
Gear rotation, multiple driving gears rotate synchronously under the action of interior gear ring, so that one group of elastic steel sheet rotates synchronously and is pressurized,
So that soil sample is pressurized uniformly, the generation of side pressure is avoided.
Preferably, the radial pressurizing device is arranged three layers, and the trapezoid block of bottom stirs sliding, middle layer by first gear
Trapezoid block sliding is stirred by second gear, the trapezoid block of top layer stirs sliding by third gear；First gear, the second tooth
Wheel and third gear coaxial arrangement and outer diameter ratio is successively decreased from lower to upper.Pass through setting various outer diameter, first gear, the second tooth
Wheel and third gear, in sliding tooth wheel one circle of rotation, corresponding first gear, second gear and third gear drives and one
The proportional relationship of displacement of one corresponding trapezoid block, so that the radial pressurizing device of different layers is to the soil in rubber membrane cylinder
Sample is applied with down horizontal thrust of different sizes, effectively simulates stake soil suffered horizontal soil pressure in practical projects, consequently facilitating
The research of stake soil test.
Beneficial effects of the present invention are as follows:
The present invention is rotated synchronously by multiple driving gears so that first gear, second gear and third gear drives and it
The proportional relationship of displacement of one-to-one trapezoid block, the tangential direction for the imaginary circles that trapezoid block is formed along one group of elastic steel sheet
Sliding, trapezoid block stir elastic steel sheet move through trapezoid block setting inclined-plane make elastic steel sheet be pressed to the imaginary circles center of circle
It is mobile, thus it is synchronous to center of circle movement and contraction by multiple elastic steel sheets mutually restricted, so that one group of elastic steel sheet inner ring
The imaginary circles uniform diameter of formation reduces, and is squeezed perpendicular to well column axially direction the soil sample edge in rubber membrane cylinder,
So that soil sample is pressurized uniformly, reduce influence of the pressure imbalance to test result.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings.
Fig. 1 is schematic perspective view of the invention；
Fig. 2 is servo hydraulic machine and well column connection schematic diagram of the invention；
Fig. 3 is the top view of radial pressurizing device of the invention；
Fig. 4 is partial enlarged view at E in Fig. 3；
Fig. 5 is the structural schematic diagram of three layers of radial pressurizing device of the invention；
Fig. 6 is the structural schematic diagram of inventive film case；
In figure: bottom plate 11, step groove 111, cover board 12, step disk 121, fastening bolt 122, support column 13, servo hydraulic machine 21,
Well column 22, displacement sensor 23, pressure sensor 24, film case 3, rubber membrane cylinder 31, backing board 32, capping 33, elastic steel sheet 41,
Tooth socket 411, inclined surface 412, fillet 413, trapezoid block 42, rack gear 51, support plate 52, first gear 53, second gear 54, third
Gear 55, driving gear 6, ring gear 7, servo motor 8, L bracket 9.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
As shown in Figures 1 to 6, a kind of borehole wall of the present invention and soil contact face shearing test equipment, including bottom plate are enclosed
11 and cover board 12, it is fixedly linked between bottom plate 11 and the cover board 12 by one group of support column 13, the support column 13 is at least set
Three are set, the upper end of support column 13 is fixedly connected with 12 bottom of cover board, and 13 lower end of support column is through bottom plate 11 and forms supporting leg；
Mounting hole is equipped in the middle part of the cover board 12, be cooperatively connected a step disk 121 in the mounting hole, and step disk 121 passes through it
Step is fastened on 12 middle part of cover board and is fixedly mounted on cover board 12 by fastening bolt 122；121 upper end of step disk is fixed
Servo hydraulic machine 21 is connected, 21 down-pressed pole lower end of servo hydraulic machine is in contact through step disk 121 and with 22 top of well column, pushes
The end face that bar is used to contact with well column 22 is equipped with displacement sensor 23, and displacement sensor 23 is connected with pressure sensor 24,
And pressure sensor 24 is folded between displacement sensor 23 and well column 22；In the structure, servo hydraulic machine 21 passes through down-pressed pole
Vertical pressure is applied on well column 22；Displacement sensor 23 is used to detect the displacement of well column 22, and pressure sensor 24 is for feeling
It answers servo hydraulic machine 21 to 22 pressure applied of well column, uses routine test means in the prior art at this, do not do herein
It is tired to state；
11 upper center of bottom plate is equipped with step groove 111, and the middle part of step groove 111 is arranged through hole, on the step groove 111
The upper end of the lower end of end in contact junctional membrane case 3, film case 3 is compressed by step disk 121；The film case 3 includes circular rubber membrane
Cylinder 31, backing board 32 and capping 33, the backing board 32 is arranged in 31 lower end of rubber membrane cylinder and will be under rubber membrane cylinder 31
Port is blocked, and capping 33 is used for the upper port of seal rubber film cylinder 31；The diameter that rubber membrane cylinder 31 is used to be set in well column 22 is outside
Side, and when well column 22 is plugged in film case 3, there is the accommodating cavity of accommodating soil sample between rubber membrane cylinder 31 and well column 22；
Radial pressurizing device is arranged in 31 periphery of rubber membrane cylinder, and the radial direction pressurizing device includes one group of arc being arranged in a ring
The elastic steel sheet 41 of shape, elastic steel sheet 41 are at least arranged three, and one end of each elastic steel sheet 41 is rotatablely installed by shaft
Between bottom plate 11 and cover board 12, the other end of each elastic steel sheet 41 presses touching in its adjacent 41 inner arc of another elastic steel sheet
Face；It is respectively provided with tooth socket 411 in each 41 lateral surface of elastic steel sheet, be slidably installed trapezoid block 42 on the upside of bottom plate 11, trapezoid block 42
Inclined-plane on correspond to tooth socket 411 teeth be set, it is virtual that the glide direction of the trapezoid block 42 is that this group of elastic steel sheet 41 is formed
Round tangential direction, the sliding of trapezoid block 42 is for rotating elastic steel sheet 41 and promoting its pressure touching in another 41 inner arc of elastic steel sheet
It is slided along intrados the one end in face；The virtual circular diameter that its inner ring that one group of rotation of elastic steel sheet 41 and mutual extrusion make is formed subtracts
It is small, to apply radial pressure to rubber membrane cylinder 31.
As one embodiment of the present invention, the pressure touching of elastic steel sheet 41 is in one end of another 41 intrados of elastic steel sheet
Inclined surface 412 is arranged in side, and at the end end rounding angle 413；So that 41 end of elastic steel sheet is convenient for from 31 surface of rubber membrane cylinder
Sliding, consequently facilitating uniformly applying radial pressure to rubber membrane cylinder 31.
As one embodiment of the present invention, each 42 side of trapezoid block is fixedly connected with a rack gear 51, Mei Gechi
51 one end of item is slidably connected through its corresponding support plate 52 and with support plate 52, and the support plate 52 is fixedly mounted on bottom plate
Between 11 and cover board 12；The rack gear 51 is meshed with first gear 53, and first gear 53 is rotatably installed in bottom plate 11 and cover board
Between 12, the tangent line for the imaginary circles that the rotation of first gear 53 drives trapezoid block 42 to be formed along one group of elastic steel sheet 41 by rack gear 51
Direction sliding.Trapezoid block 42 stir elastic steel sheet 41 move through trapezoid block 42 setting inclined-plane make elastic steel sheet 41 be pressurized
Mobile to the imaginary circles center of circle, one end which is extruded in next 41 intrados of arc spring lamination is pressurized and slides, from
And it is synchronous to center of circle movement and contraction by multiple elastic steel sheets 41 mutually restricted, so that one group of 41 inner ring of elastic steel sheet is formed
Imaginary circles uniform diameter reduce so that soil sample be pressurized uniformly, avoid the generation of side pressure.
As one embodiment of the present invention, the shaft of each first gear 53 runs through cover board 12 and end is equal on it
It is fixedly connected with a driving gear 6, each driving gear 6, which engages, is connected to 7 inside of ring gear, the rotation of ring gear 7 peace
Mounted in 12 upside of cover board.
As one embodiment of the present invention, the shaft upper end of one of driving gear 6 and 8 output shaft of servo motor
It is fixedly and coaxially connected, the servo motor 8 is fixedly mounted on 12 upside of cover board by L bracket 9.Servo motor 8 is rotated and is protected
Torque is held, so that the driving driving gear 6 of ring gear 7 rotates, multiple driving gears 6 rotate synchronously under the action of ring gear 7, make
It obtains one group of elastic steel sheet 41 to rotate synchronously and be pressurized, so that soil sample is pressurized uniformly, avoids the generation of side pressure.
As one embodiment of the present invention, the radial direction pressurizing device is arranged three layers, and the trapezoid block 42 of bottom passes through
First gear 53 stirs sliding, and the trapezoid block 42 in middle layer stirs sliding by second gear 54, and the trapezoid block 42 of top layer passes through the
Three gears 55 stir sliding；First gear 53, second gear 54 and the coaxial arrangement of third gear 55 and outer diameter ratio from lower to upper
Successively decrease.Pass through setting various outer diameter, first gear 53, second gear 54 and third gear 55, in one circle of driving gear 6 rotation
When, corresponding first gear 53, second gear 54 and third gear 55 drive the displacement with its one-to-one trapezoid block 42
Proportional relationship so that the radial pressurizing device of different layers the soil sample in rubber membrane cylinder 31 is applied with down it is of different sizes
Horizontal thrust, stake soil suffered horizontal soil pressure in practical projects is effectively simulated, consequently facilitating the research of stake soil test.
Working principle of the present invention is as follows:
Experimenter's prefabricated well column 22, and well column 22 is inserted into film case 3, after soil sample is packed into rubber membrane cylinder 31 and is compacted,
Cover the upper port of 33 seal rubber film cylinders 31；Then the backing board 32 of film case 3 is installed in step groove 111；
Servo hydraulic machine 21, the end face that 21 down-pressed pole of servo hydraulic machine is contacted with well column 22 are fixedly connected in 121 upper end of step disk
It is equipped with displacement sensor 23, pressure sensor 24 is folded between displacement sensor 23 and well column 22, and last step disk 121 is pacified
Step disk 121 and cover board 12 are fastened in 12 middle part mounting hole of cover board, and through fastening bolt 122, complete testing equipment
Assembling；
In test, torque is rotated and kept by servo motor 8, so that the driving driving gear 6 of ring gear 7 rotates, multiple drives
Moving gear 6 rotates synchronously under the action of ring gear 7, when driving one circle of rotation of gear 6, corresponding first gear 53, second
Gear 54 and third gear 55 drive relationship proportional to the displacement of its one-to-one trapezoid block 42, and trapezoid block 42 is along one group
The tangential direction sliding for the imaginary circles that elastic steel sheet 41 is formed, trapezoid block 42 stir elastic steel sheet 41 and move through trapezoid block 42
It is mobile that the inclined-plane of setting makes elastic steel sheet 41 be pressed to the imaginary circles center of circle, to pass through multiple elastic steel sheets 41 mutually restricted
It synchronizes mobile to the center of circle and shrinks, so that the imaginary circles uniform diameter that one group of 41 inner ring of elastic steel sheet is formed reduces, to rubber membrane
Soil sample in cylinder 31 perpendicular to 22 axially direction of well column along being squeezed, multiple-layer horizontal thrust linear increment from top to bottom；
When the upper section and lower section that measure pile cutoff in the pressure and Practical Project that top layer thrust and bottom thrust generate soil sample
When place's pressure difference is equal, maintain each layer horizontal thrust constant.
Finally, starting servo hydraulic machine 21 applies vertical pressure to well column 22, used in the vertical pressure under, well column 22 is perpendicular
To moving, 22 pressure of well column and displacement are obtained by pressure sensor 24 and displacement sensor 23 respectively, and according to
The calculation of the prior art calculates pile-soil interface shearing force.
Although the present invention be illustrated by specific embodiment, it will be appreciated by those skilled in the art that, do not departing from
In the case where the scope of the invention, various transformation and equivalent substitute can also be carried out to the present invention.In addition, being directed to particular condition or material
Material, can do various modifications to the present invention, without departing from the scope of the present invention.Therefore, the present invention is not limited to disclosed tool
Body embodiment, and should include the whole embodiments fallen within the scope of the appended claims.
Claims (6)
1. a kind of borehole wall and enclose soil contact face shearing test equipment, including bottom plate (11) and cover board (12), bottom plate (11) with it is described
It is fixedly linked between cover board (12) by one group of support column (13), the support column (13) is at least arranged three, support column (13)
Upper end be fixedly connected with cover board (12) bottom, support column (13) lower end is through bottom plate (11) and forming supporting leg；
Mounting hole is equipped in the middle part of the cover board (12), be cooperatively connected a step disk (121) in the mounting hole, step disk (121)
It is fastened in the middle part of cover board (12) by its step and is fixedly mounted on cover board (12) by fastening bolt (122)；The step
Disk (121) upper end is fixedly connected servo hydraulic machine (21), servo hydraulic machine (21) down-pressed pole lower end through step disk (121) and with
Well column (22) top is in contact, and the end face that down-pressed pole is used to contact with well column (22) is equipped with displacement sensor (23), and displacement passes
Sensor (23) is connected with pressure sensor (24), and pressure sensor (24) is folded in displacement sensor (23) and well column (22)
Between；In the structure, vertical pressure is applied on well column (22) by servo hydraulic machine (21) by down-pressed pole；Displacement sensor
(23) for detecting the displacement of well column (22), pressure sensor (24) applies well column (22) for incuding servo hydraulic machine (21)
The pressure added uses routine test means in the prior art at this, does not do tired state herein；
Bottom plate (11) upper center is equipped with step groove (111), and through hole, the step is arranged in the middle part of step groove (111)
The upper end of the lower end of slot (111) upper-end contact junctional membrane case (3), film case (3) is compressed by step disk (121)；The film case (3)
Including circular rubber membrane cylinder (31), backing board (32) and capping (33), the backing board (32) is arranged in the rubber membrane cylinder
(31) lower end and the lower port of rubber membrane cylinder (31) is blocked, capping (33) is used for upper port of seal rubber film cylinder (31)；Rubber
Glue film cylinder (31) is used to be set in the radial outsides of well column (22), and when well column (22) be plugged in film case (3) it is interior when, rubber membrane cylinder
(31) there is the accommodating cavity of accommodating soil sample between well column (22)；
It is characterized in that, radial pressurizing device is arranged in rubber membrane cylinder (31) periphery, the radial direction pressurizing device includes one group
The elastic steel sheet (41) for the arc being arranged in a ring, elastic steel sheet (41) are at least arranged three, and the one of each elastic steel sheet (41)
End is rotatably installed between bottom plate (11) and cover board (12) by shaft, and the other end of each elastic steel sheet (41) presses touching to exist
Its adjacent another elastic steel sheet (41) intrados；In each elastic steel sheet (41), lateral surface is respectively provided with tooth socket (411), in bottom plate
(11) upside is slidably installed trapezoid block (42), and tooth socket (411) setting teeth, the trapezoid block are corresponded on the inclined-plane of trapezoid block (42)
(42) glide direction is the tangential direction for the imaginary circles that this group of elastic steel sheet (41) is formed, and trapezoid block (42) is slided for making bullet
Property steel disc (41) rotate and promote its pressure touching one end of another elastic steel sheet (41) intrados along intrados slide；One group of elasticity
The virtual circular diameter that its inner ring that steel disc (41) rotation and mutual extrusion make is formed reduces, to apply diameter to rubber membrane cylinder (31)
To pressure.
2. a kind of borehole wall according to claim 1 and enclosing soil contact face shearing test equipment, it is characterised in that: elastic steel sheet
(41) inclined surface (412) are arranged on the inside of one end of another elastic steel sheet (41) intrados in pressure touching, and at the end end rounding angle
(413).
3. a kind of borehole wall according to claim 1 or 2 and enclosing soil contact face shearing test equipment, it is characterised in that: each
Trapezoid block (42) side is fixedly connected with a rack gear (51), and its corresponding support plate (52) are run through in each rack gear (51) one end
And be slidably connected with support plate (52), the support plate (52) is fixedly mounted between bottom plate (11) and cover board (12)；The tooth
Item (51) is meshed with first gear (53), and first gear (53) is rotatably installed between bottom plate (11) and cover board (12), and first
The tangent line side for the imaginary circles that gear (53) rotation drives trapezoid block (42) to be formed along one group of elastic steel sheet (41) by rack gear (51)
To sliding.
4. a kind of borehole wall according to claim 3 and enclosing soil contact face shearing test equipment, it is characterised in that: each first
The shaft of gear (53) runs through cover board (12) and end is fixedly connected with a driving gear (6), each driving gear on it
(6) engagement is connected on the inside of ring gear (7), and the ring gear (7) is rotatably installed on the upside of cover board (12).
5. a kind of borehole wall according to claim 4 and enclosing soil contact face shearing test equipment, it is characterised in that: one of them
The shaft upper end of driving gear (6) is fixedly and coaxially connected with servo motor (8) output shaft, and the servo motor (8) passes through L shape branch
Frame (9) is fixedly mounted on the upside of cover board (12).
6. a kind of borehole wall according to claim 4 or 5 and enclosing soil contact face shearing test equipment, it is characterised in that: described
Radial pressurizing device is arranged three layers, and the trapezoid block (42) of bottom stirs sliding, the trapezoid block in middle layer by first gear (53)
(42) sliding is stirred by second gear (54), the trapezoid block (42) of top layer stirs sliding by third gear (55)；First tooth
Taking turns (53), second gear (54) and third gear (55) coaxial arrangement and outer diameter, ratio is successively decreased from lower to upper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088463.0A CN109682691B (en) | 2019-01-30 | 2019-01-30 | Shearing test equipment for contact surface of well wall and surrounding soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910088463.0A CN109682691B (en) | 2019-01-30 | 2019-01-30 | Shearing test equipment for contact surface of well wall and surrounding soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109682691A true CN109682691A (en) | 2019-04-26 |
| CN109682691B CN109682691B (en) | 2021-11-12 |
Family
ID=66195032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910088463.0A Active CN109682691B (en) | 2019-01-30 | 2019-01-30 | Shearing test equipment for contact surface of well wall and surrounding soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109682691B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185068A (en) * | 2019-05-10 | 2019-08-30 | 河海大学 | A kind of scale (model) test device of analog prototype pile foundation stress state |
| LU101323A1 (en) * | 2019-07-22 | 2019-11-29 | Shanghai Minie Tech Co Ltd | Dynamic testing device for mechanical properties of pile and soil |
| CN111157364A (en) * | 2020-01-19 | 2020-05-15 | 檀俊坤 | Pile-soil contact surface shearing mechanical property testing device |
| CN114112604A (en) * | 2022-01-29 | 2022-03-01 | 北京建筑大学 | Frozen soil sample preparation device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203974012U (en) * | 2014-07-11 | 2014-12-03 | 玉石塑粉有限公司 | Plastic extruder |
| US20160054211A1 (en) * | 2013-03-27 | 2016-02-25 | Shandong University | Device and method for measuring true triaxial creep of geotechnical engineering test block |
| CN206638535U (en) * | 2017-04-06 | 2017-11-14 | 河南理工大学 | It is a kind of to be used to survey soil and the boxshear apparatus of structure interface mechanical property |
| CN207623156U (en) * | 2017-10-31 | 2018-07-17 | 中国地质大学（武汉） | A kind of wide section ring shear apparatus of power control formula |
| CN108444841A (en) * | 2018-06-08 | 2018-08-24 | 中南大学 | A kind of pile-soil interface shearing mechanics characteristic test method |
| CN108444817A (en) * | 2018-06-08 | 2018-08-24 | 中南大学 | A kind of thrust device for pile-soil interface shearing dynamic characteristic test |
| CN108593463A (en) * | 2018-08-02 | 2018-09-28 | 中南大学 | A kind of pile-soil interface shearing mechanics characteristic test device |
| CN108801807A (en) * | 2018-06-08 | 2018-11-13 | 中南大学 | A kind of pile-soil interface shearing dynamic characteristic test apparatus |
| CN109043830A (en) * | 2018-09-22 | 2018-12-21 | 湖州南浔雷欧木制品厂 | A kind of wooden drawing board of Fine Arts |
-
2019
- 2019-01-30 CN CN201910088463.0A patent/CN109682691B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160054211A1 (en) * | 2013-03-27 | 2016-02-25 | Shandong University | Device and method for measuring true triaxial creep of geotechnical engineering test block |
| CN203974012U (en) * | 2014-07-11 | 2014-12-03 | 玉石塑粉有限公司 | Plastic extruder |
| CN206638535U (en) * | 2017-04-06 | 2017-11-14 | 河南理工大学 | It is a kind of to be used to survey soil and the boxshear apparatus of structure interface mechanical property |
| CN207623156U (en) * | 2017-10-31 | 2018-07-17 | 中国地质大学（武汉） | A kind of wide section ring shear apparatus of power control formula |
| CN108444841A (en) * | 2018-06-08 | 2018-08-24 | 中南大学 | A kind of pile-soil interface shearing mechanics characteristic test method |
| CN108444817A (en) * | 2018-06-08 | 2018-08-24 | 中南大学 | A kind of thrust device for pile-soil interface shearing dynamic characteristic test |
| CN108801807A (en) * | 2018-06-08 | 2018-11-13 | 中南大学 | A kind of pile-soil interface shearing dynamic characteristic test apparatus |
| CN108593463A (en) * | 2018-08-02 | 2018-09-28 | 中南大学 | A kind of pile-soil interface shearing mechanics characteristic test device |
| CN109043830A (en) * | 2018-09-22 | 2018-12-21 | 湖州南浔雷欧木制品厂 | A kind of wooden drawing board of Fine Arts |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110185068A (en) * | 2019-05-10 | 2019-08-30 | 河海大学 | A kind of scale (model) test device of analog prototype pile foundation stress state |
| LU101323A1 (en) * | 2019-07-22 | 2019-11-29 | Shanghai Minie Tech Co Ltd | Dynamic testing device for mechanical properties of pile and soil |
| CN111157364A (en) * | 2020-01-19 | 2020-05-15 | 檀俊坤 | Pile-soil contact surface shearing mechanical property testing device |
| CN114112604A (en) * | 2022-01-29 | 2022-03-01 | 北京建筑大学 | Frozen soil sample preparation device |
| CN114112604B (en) * | 2022-01-29 | 2022-06-10 | 北京建筑大学 | Frozen soil sample preparation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109682691B (en) | 2021-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109682691A (en) | A kind of borehole wall and enclose soil contact face shearing test equipment | |
| CN104458445B (en) | Shear test device and shear test method in in-situ soil body pore | |
| Jaeger | Rock mechanics and engineering | |
| Bernier et al. | Twenty-five years' geotechnical observation and testing in the Tertiary Boom Clay format | |
| CN104200734B (en) | A kind of method of inverting coal seam bottom water bursting | |
| Detournay et al. | FLAC and numerical modeling in geomechanics | |
| CN104535422B (en) | A kind of method of simulation test drilling deformation | |
| Zhou et al. | A 3D model of coupled hydro-mechanical simulation of double shield TBM excavation | |
| CN103076119A (en) | Method for measuring floor heave main control stress of laneway | |
| Yang et al. | A true triaxial geomechanical model test apparatus for studying the precursory information of water inrush from impermeable rock mass failure | |
| CN106404661A (en) | Indoor measuring device for friction between soil mass and structure and use method of measuring device | |
| Li et al. | Time-dependent empirical model for fracture propagation in soil grouting | |
| CN103063335A (en) | Three-dimensional geological survey testing method of deep portion crustal stress based on loading monitoring data | |
| CN103821125B (en) | A kind of multi-functional multiple position extensometer anchor head | |
| Jardine et al. | Lessons learned from full scale observations and the practical application of advanced testing and modelling | |
| O'Neill et al. | Behavior of bored piles in Beaumont clay | |
| Wu et al. | Design and application of hydro-mechanical coupling test system for simulating rock masses in high dam reservoir operations | |
| CN108331041B (en) | A kind of experimental rig and method of soil anchor drawing | |
| CN108760511A (en) | Three axis loading device of dynamic disturbances servo based on conventional rock test rig and system | |
| CN206114655U (en) | A test device for simulating coal mining overlying strata grouting in separated -bed | |
| CN201689014U (en) | Portable base plate specific pressure testing device | |
| CN104847343B (en) | Shaft wall stability is moved analogue means and the method that change is influenceed by water-bearing layer | |
| CN115341886A (en) | Composite rock stratum fracturing simulation method and device | |
| Jia et al. | Bolt–cable–mesh integrated support technology for water drenching roadway in thick coal seam | |
| CN206709814U (en) | One kind is applied to the monitoring convergent detection means of vcehicular tunnel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |