CN208270333U - Measure any depth soil layer side friction device - Google Patents
Measure any depth soil layer side friction device Download PDFInfo
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- CN208270333U CN208270333U CN201820951944.0U CN201820951944U CN208270333U CN 208270333 U CN208270333 U CN 208270333U CN 201820951944 U CN201820951944 U CN 201820951944U CN 208270333 U CN208270333 U CN 208270333U
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Abstract
The utility model provides a kind of any depth soil layer side friction device of measurement, it includes: shell, for carrying the pressure for being applied to the soil body, one end and the confining pressure bearing plate of shell are slidably and sealingly connected with the shell, and the other end is equipped with the hole being slidably and sealingly connected with transmission rod；Confining pressure bearing plate, the load for transmitting load are slidably and sealingly connected with to the soil body, the outer wall of confining pressure bearing plate and the inner wall of shell, and the hole being slidably and sealingly connected with transmission rod is equipped on confining pressure bearing plate；Transmission rod obtains soil layer side friction, one end and the confining pressure bearing plate of transmission rod are slidably and sealingly connected with, and the other end and the hole of shell end face are slidably and sealingly connected with for applying load along axial.In use, simulating different depth earth pressure in pressure-loaded to confining pressure bearing plate, then by pressure-loaded to transmission rod, the pressure when transmission rod starts mobile is the maximum pressure that can bear under side friction effect.The different depth soil layer side friction value that more can accurately obtain.
Description
Technical field
The utility model relates to foundation soil properties to determine field, especially a kind of any depth soil layer side friction of measurement
Device and method.
Background technique
China region is wide, and engineering geological condition is more complicated, and in Geotechnical Engineering standard, soil layer side friction is outstanding
The determination of its deep layer soil layer side friction is that academic opinion disagreement is bigger in the important content and soil mechanics of Foundation Design
Problem.It provides to determine side friction value, only empirical equation generally according to specification at present, for different depth soil layer side friction
True value is difficult to determine, identified side friction value also tends to relatively guard, and cannot give full play to ground mafic to a certain extent
Can, structure design is relatively conservative, causes to waste indirectly.In terms of side friction determination, specification provides value and often relatively guards, and
And side friction value size between given structure and the soil body, also seldom consider that structural material is worth influencing on side friction.Cause
How this, obtain accurate different depth soil layer side friction value, either has to structure design or engineering construction
There is larger benefit.
105547841 A of Chinese patent literature CN describe a kind of rock side friction test device that confining pressure is controllable and
Its method is related to rock mass mechanics embedded rock pile technology.The device is: lower cover plate, pressure chamber and upper cover plate are sequentially connected from bottom to top
Form external structure；Pedestal, gasket ring, rock sample and guide pipe are sequentially connected composition internal structure from bottom to top, will be interior with latex film
Portion's component nesting is integral；At rock sample center, it is vertically arranged with perforative rock sample circular hole, is provided in rock sample circular hole
Isometric threaded rod, there are gaps between threaded rod and the inner wall of rock sample circular hole, and the cement of high fluidity is poured in gap
Slurry；Guide rod passes through guide pipe and threaded rod is vertically connected with.The device can simulate embedded rock pile and the destruction of rock interface is special
Property, with confining pressure condition of the hydraulic pressure effect simulation stake in practical rock stratum in pressure chamber, axle power is obtained with Model Pile change in displacement
Rule, the side friction of rock is calculated, and standard is unified, it can be achieved that repeatedly industry duplication, suitable for each rocks
Side friction test.But the device is had the following problems with pressure fluid simulation confining pressure condition:
1, larger with actual side friction condition gap.
2, loading method is complex.
3, the sealing of pressure fluid is difficult to realize under condition of high voltage.
4, the volume size of test sample is limited by loading device.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of any depth soil layer side friction device of measurement and
Method can obtain the preferable different depth position soil layer side friction value of property of coincideing with practical ground situation.Preferred scheme
In, it is capable of side friction value of the soil layer to anchoring pile of convenient experimental verification difference soil property different depth position.
A kind of in order to solve the above technical problems, the technical scheme adopted by the utility model is: any depth soil layer of measurement
Side friction device, it includes:
Shell, the shell slide close for carrying the pressure for being applied to the soil body, one end and the confining pressure bearing plate of shell
Envelope connection, the other end are equipped with the hole being slidably and sealingly connected with transmission rod；
Confining pressure bearing plate, the load for transmitting load are slided to the soil body, the outer wall of confining pressure bearing plate and the inner wall of shell
It is tightly connected, the hole being slidably and sealingly connected with transmission rod is equipped on confining pressure bearing plate；
Transmission rod obtains soil layer side friction, one end of transmission rod and confining pressure bearing plate are sliding for applying load along axial
Dynamic sealing connection, the other end and the hole of shell end face are slidably and sealingly connected with.
In preferred scheme, it is additionally provided with pressure detecting instrument, wherein the setting of first pressure detector is in confining pressure bearing plate, and second
Pressure detecting instrument is arranged in transmission rod.
In preferred scheme, the shell is vertically arranged, and transmission rod passes through shell and confining pressure bearing plate, on the inner wall of the housing
The soil body is filled between transmission rod；
First loading device is by the first pressure transmission plate and the load of first pressure detector on confining pressure bearing plate；
Second loading device is by the second pressure transmission plate and the load of second pressure detector on transmission rod.
In preferred scheme, housing bottom is equipped with support, and transmission rod passes through the bottom of shell, and is limited bolt and axially limits
Position.
In preferred scheme, the shell is horizontally disposed, is detected frame bearing and axial limiting；
Transmission rod passes through shell and confining pressure bearing plate, and the soil body is filled between transmission rod and inner walls；
It is equipped with end baffle at the both ends of testing stand, first is equipped between end baffle and confining pressure bearing plate at one end and adds
Carry cylinder, pressure transmission plate and first pressure detector；
The second load cylinder and second pressure detector are equipped between the end baffle and confining pressure bearing plate of the other end.
In preferred scheme, the soil body is the simulation soil body according to practical soil layer stratification state hierarchical simulation.
In preferred scheme, in the testing stand, bottom plate is equipped at least one support base, and support is located on shell
The two sides of seat are equipped with limit base；
It is equipped with by the position of two close end for supporting the load cylinder support for loading cylinder in bottom plate.
In preferred scheme, displacement sensor is equipped between shell and transmission rod.
A kind of measurement method using the above-mentioned any depth soil layer side friction device of measurement, comprising the following steps:
S1, it transmission rod is fixed temporarily with shell connect, it is smooth by the soil body injection shell of required measurement side friction
Densification；
S2, confining pressure bearing plate is put into shell, first pressure detector and the first pressure transmission plate is installed, according to required monitoring
Soil body depth calculates the pressure that the depth soil layer is born, and pressure is passed through first using the first loading device straight down
Pressure transmission plate and first pressure detector are loaded on confining pressure bearing plate, and first pressure detector is for monitoring the big of on-load pressure
It is small；
S3, it will be fixed temporarily release between transmission rod and shell, second pressure detector and second is installed in transmission rod
The pressure gradually increased is loaded into biography by the second pressure transmission plate and second pressure detector by the second loading device by pressure transmission plate
On power bar, the pressure when transmission rod starts mobile is the maximum pressure that can bear under side friction effect；
The measurement of any depth soil layer side friction is realized by above step.
A kind of measurement method using the above-mentioned any depth soil layer side friction device of measurement, comprising the following steps:
S1, it transmission rod is fixed temporarily with shell connect, by the soil body layering injection shell of required measurement side friction,
Smooth densification；
S2, being fixed temporarily between transmission rod and shell is removed, confining pressure bearing plate is put into shell, by shell level
It supports and is fixed on testing stand, installation first pressure detector, pressure transmission plate and the first load cylinder are deep according to the required monitoring soil body
Degree, calculates the pressure that the depth soil layer is born, and the first load cylinder loads pressure by pressure transmission plate and first pressure detector
Onto confining pressure bearing plate, first pressure detector is used to monitor the size of on-load pressure；
S3, second pressure detector, pressure transmission plate and the second load cylinder are installed in transmission rod, load cylinder for pressure by second
It is loaded on transmission rod by pressure transmission plate and second pressure detector, the pressure when transmission rod starts mobile is side friction
The maximum pressure that can bear under effect；
The measurement of any depth soil layer side friction is realized by above step.
A kind of any depth soil layer side friction device of measurement provided by the utility model, by using above-mentioned scheme,
With below the utility model has the advantages that
1, the different depth soil layer side friction value that can be obtained by the utility model, and the side friction value and reality
Border ground situation can preferably coincide, also being capable of influence by structural material to side friction value in terms of side friction determination
It brings into numerical value change.
2, it can be accurately obtained the side friction value of different depth soil layer by the utility model, structure design and engineering are applied
Work all has accurate reference value.
3, the apparatus structure of the utility model is simple, easy to use.
4, in the preferred scheme, the device and method of the utility model is all enough really simulates different depth difference very much
Influence of the ingredient soil layer to tubular pole bearing capacity.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the structural schematic diagram of utility model device.
Fig. 2 is the preferred overall structure diagram of utility model device.
Fig. 3 is the structural schematic diagram of temporary fastening device in the utility model.
In figure: first pressure detector 1, second pressure detector 1', the first pressure transmission plate 2, the second pressure transmission plate 3, confining pressure is held
Pressing plate 4, transmission rod 5, the soil body 6, first shell 7, support 8, caging bolt 9, testing stand 100, bottom plate 1001, support base 1002,
Cylinder support 1003 is loaded, end baffle 1004, displacement sensor 101, the first load cylinder 102, the second load cylinder 103, simulation is enclosed
Pressure bearing plate 104, the second transmission rod 105, the simulation soil body 106, second shell 107, limit base 108, interim positioning plate 109 are fixed
Position hole 1091, fills hole 1092, third pressure transmission plate 110.
Specific embodiment
Embodiment 1:
In Fig. 1 ~ 2, a kind of any depth soil layer side friction device of measurement, it includes:
Shell, the shell slide close for carrying the pressure for being applied to the soil body, one end and the confining pressure bearing plate of shell
Envelope connection, the other end are equipped with the hole being slidably and sealingly connected with transmission rod；
Confining pressure bearing plate, the load for transmitting load are slided to the soil body, the outer wall of confining pressure bearing plate and the inner wall of shell
It is tightly connected, the hole being slidably and sealingly connected with transmission rod is equipped on confining pressure bearing plate；Thus structure, by confining pressure bearing plate
Apply load, i.e. load suffered by analog different depth soil layer.
Transmission rod obtains soil layer side friction, one end of transmission rod and confining pressure bearing plate are sliding for applying load along axial
Dynamic sealing connection, the other end and the hole of shell end face are slidably and sealingly connected with.
Preferred scheme such as Fig. 1, in 2, it is additionally provided with pressure detecting instrument, the wherein setting of first pressure detector 1 is held in confining pressure
Pressing plate, second pressure detector 1' are arranged in transmission rod.Pressure detecting instrument in this example is pressure sensor, such as includes pressure
The device of foil gauge, for detecting the pressure value of load.
Embodiment 2:
On the basis of embodiment 1, as shown in figure 1, first shell 7 is vertically arranged preferred scheme, at the bottom of first shell 7
Portion is equipped with support 8, and support 8 is equipped with overhead cavity, and transmission rod 5 passes axially through first shell 7 and confining pressure bearing plate 4, the
The soil body 6 is filled between one shell, 7 inner wall and transmission rod 5；Transmission rod 5 passes through the bottom of first shell 7, and is limited bolt 9
Axial limiting.
First loading device is by the first pressure transmission plate 2 and the load of first pressure detector 1 on confining pressure bearing plate 4；First
Loading device is press machine, is being not shown in the figure.
Second loading device is by the second pressure transmission plate 3 and second pressure detector 1' load on transmission rod 5.Second load
Device is press machine, is being not shown in the figure.
In the preferred scheme, the first loading device is annular hydraulic cylinder, and piston is annular, corresponding first pressure transmission
Plate 2 and first pressure detector 1 are also annular.Second loading device is located at the center of the first loading device, the first loading device
Load can be applied respectively with the second loading device.
Embodiment 3:
On the basis of embodiment 1,2, a kind of measurement using the above-mentioned any depth soil layer side friction device of measurement
Method, comprising the following steps:
S1, it transmission rod 5 is fixed temporarily with first shell 7 with caging bolt 9 connect, by the soil of required measurement side friction
Body injects in first shell 7, smooth densification；
S2, confining pressure bearing plate 4 is put into first shell 7, first pressure detector 1 and the first pressure transmission plate 2 is installed, according to
Required monitoring soil body depth calculates the pressure that the depth soil layer is born, using the first loading device straight down by pressure
It is loaded on confining pressure bearing plate 4 by the first pressure transmission plate 2 and first pressure detector 1, first pressure detector 1 adds for monitoring
Carry the size of pressure；First loading device is used to simulate the pressure of different depth soil layer.
S3, the i.e. caging bolt 9 that is fixed temporarily between transmission rod 5 and first shell 7 is unclamped, on the top of transmission rod 5
Second pressure detector 1' and the second pressure transmission plate 3 are installed, passed the pressure gradually increased by second by the second loading device
Pressing plate 3 and second pressure detector 1' are loaded on transmission rod 5, and when transmission rod 5 starts mobile, second pressure detector 1' is examined
The pressure measured is the maximum pressure that can bear under side friction effect；The pressure is divided by transmission rod and soil body contact surface
Product, the i.e. product of transmission rod perimeter of section and power transmission pole length, maximum quiet side friction as between transmission rod and the soil body；Monitor power transmission
The pressure that second pressure detector 1' during bar moves down between transmission rod 5 and the second pressure transmission plate 3 is detected, the pressure
Divided by transmission rod and soil body contact area, the i.e. product of transmission rod perimeter of section and power transmission pole length, as between transmission rod and the soil body
The size of dynamic side friction.
The measurement of any depth soil layer side friction is realized by above step.
Embodiment 4:
On the basis of embodiment 1, preferred scheme such as Fig. 2, in 3, the second shell 107 is horizontally disposed, is detected
Survey the bearing of frame 100 and axial limiting；
In preferred scheme, in the testing stand 100, bottom plate 1001 is equipped at least one support base 1002, in shell
Limit base 108 is equipped with positioned at the two sides of support base 1002 on body；Thus structure can limit the axial displacement of second shell 107.
It is equipped with by the position of two close end for supporting the load cylinder support 1003 for loading cylinder in bottom plate 1001.In testing stand
100 both ends are equipped with end baffle 1004, and limit base 108, support base 1002 and end baffle 1004 are designed with reinforcing rib, to mention
High-bearing capacity.
Second transmission rod 105 passes through second shell 107 and simulation confining pressure bearing plate 104, in the second transmission rod 105 and second
The soil body is filled between 107 wall of shell；As in Fig. 2 in preferred scheme, the soil body in this example is to be layered shape according to practical soil layer
The simulation soil body 106 of state hierarchical simulation.Such as it obtains being followed successively by gravel, backfill coagulation under certain depth in ground sampling process
Soil successively fills gravel between 107 wall of the second transmission rod 105 and second shell then according to lift height containing sand clay and clay
Stone, contains sand clay and clay at fill concrete, to simulate true soil layer state.
The first load cylinder 102, third pressure transmission is equipped between end baffle 1004 and simulation confining pressure bearing plate 104 at one end
Plate 110 and first pressure detector；
The second load cylinder, pressure transmission plate 110 and second pressure are equipped between the end baffle and confining pressure bearing plate of the other end
Detector.
In preferred scheme, displacement sensor 101 is equipped between second shell 107 and the second transmission rod 105.With monitoring
The displacement starting state of second transmission rod 105.Displacement sensor 101 in this example uses optical sensor, 101 quilt of displacement sensor
It is fixedly mounted on the end face of second shell 107, detector the second transmission rod 105 of direction of displacement sensor 101.
Embodiment 5:
On the basis of embodiment 4, a kind of measurement side using the above-mentioned any depth soil layer side friction device of measurement
Method, comprising the following steps:
S1, it the second transmission rod 105 is fixed temporarily with second shell 107 connect, connected in this example using interim positioning plate 109
The second transmission rod 105 and second shell 107 are connect, interim positioning plate 109 is circular plate, and it is fixed to be equipped on interim positioning plate 109
Position hole 1091 is equipped with filling hole 1092 around location hole 1091, uses for positioning the radial position of the second transmission rod 105
The soil body 106 is simulated in filling.The soil body layering of required measurement side friction is injected in second shell 107, smooth densification；
S2, being fixed temporarily between the second transmission rod 105 and second shell 107 is removed, confining pressure bearing plate 104 will be simulated
It is put into second shell 107, by 107 horizontal supporting of second shell and is fixed on testing stand 100, first pressure detector is installed
1, third pressure transmission plate 110 and the first load cylinder 102, in preferred scheme, third pressure transmission plate 110 uses tray type structure, and third passes
The raised brim of pressing plate 110 is contacted with first pressure detector 1, the work of the bottom of third pressure transmission plate 110 and the first load cylinder 102
Stopper rod contact.It is transferred on simulation confining pressure bearing plate 104 with the pressure for applying the first load cylinder 102.According to required monitoring soil
Body depth, calculates the pressure that the depth soil layer is born, and the first load cylinder 102 detects pressure by pressure transmission plate and first pressure
Instrument 1 is loaded on confining pressure bearing plate, and first pressure detector 1 is used to monitor the size of on-load pressure, until reaching default value；
Support base 1002 and limit base 108 are for carrying axial compressive force.
S3, second pressure detector 1', pressure transmission plate and the second load cylinder 103 are installed in the second transmission rod 105, pass through second
Pressure is loaded on the second transmission rod 105 by load cylinder 103 by pressure transmission plate and second pressure detector 1', when the second transmission rod
105 pressure when starting mobile is the maximum pressure that can bear under side friction effect；The pressure is divided by the second transmission rod
105 with soil body contact area, i.e. the product of 105 length of 105 perimeter of section of the second transmission rod and the second transmission rod, as the second power transmission
Maximum quiet side friction between bar 105 and the soil body；Monitor the second transmission rod 105 and biography during the second transmission rod 105 moves down
The pressure that second pressure detector 1' between pressing plate is detected, the pressure divided by the second transmission rod 105 and soil body contact area,
That is side is moved between the product of 105 length of 105 perimeter of section of the second transmission rod and the second transmission rod, as the second transmission rod 105 and the soil body
The size of frictional resistance.
The measurement of any depth soil layer side friction is realized by above step.Advantage in this example is to experimental facilities
Requirement it is lower, can easily obtain at the construction field (site), be especially suitable for the test experiments for long tubular pole.And from both ends
The scheme loaded respectively, the simulation soil body 106 along axial pressure change also with the soil body pressure-bearing situation at practice of construction scene compared with
It is close.It more can really simulate the side friction of any depth soil layer.
The above embodiments are only the optimal technical scheme of the utility model, and are not construed as the limit for the utility model
System, the features in the embodiments and the embodiments of the present application in the absence of conflict, can mutual any combination.This is practical new
The protection scope of type should be with the technical solution of claim record, technical characteristic in the technical solution recorded including claim
Equivalents are protection scope.Equivalent replacement i.e. within this range is improved, also the protection scope of the utility model it
It is interior.
Claims (8)
1. a kind of any depth soil layer side friction device of measurement, it is characterized in that it includes:
Shell, the shell are slidingly sealed company for carrying the pressure for being applied to the soil body, one end of shell and confining pressure bearing plate
It connects, the other end is equipped with the hole being slidably and sealingly connected with transmission rod；
Confining pressure bearing plate, the load for transmitting load are slidingly sealed to the soil body, the outer wall of confining pressure bearing plate and the inner wall of shell
Connection is equipped with the hole being slidably and sealingly connected with transmission rod on confining pressure bearing plate；
Transmission rod obtains soil layer side friction, one end and the confining pressure bearing plate of transmission rod slide close for applying load along axial
Envelope connection, the other end and the hole of shell end face are slidably and sealingly connected with.
2. a kind of any depth soil layer side friction device of measurement according to claim 1, it is characterized in that: being additionally provided with pressure
Detector, wherein first pressure detector (1) is arranged in confining pressure bearing plate, (1') transmission rod is arranged in second pressure detector.
3. a kind of any depth soil layer side friction device of measurement according to claim 1, it is characterized in that: the shell
It is vertically arranged, transmission rod (5) passes through shell and confining pressure bearing plate, is filled with the soil body between transmission rod (5) on the inner wall of the housing；
First loading device is by the first pressure transmission plate (2) and first pressure detector (1) load on confining pressure bearing plate (4)；
(1') second loading device is loaded on transmission rod (5) by the second pressure transmission plate (3) and second pressure detector.
4. a kind of any depth soil layer side friction device of measurement according to claim 3, it is characterized in that: housing bottom is set
Have support (8), transmission rod (5) passes through the bottom of shell, and is limited bolt (9) axial limiting.
5. a kind of any depth soil layer side friction device of measurement according to claim 1, it is characterized in that: the shell
It is horizontally disposed, it is detected frame (100) bearing and axial limiting；
Transmission rod passes through shell and confining pressure bearing plate, and the soil body is filled between transmission rod and inner walls；
End baffle (1004) are equipped at the both ends of testing stand (100), are set between end baffle and confining pressure bearing plate at one end
There are the first load cylinder (102), pressure transmission plate and first pressure detector；
The second load cylinder and second pressure detector are equipped between the end baffle and confining pressure bearing plate of the other end.
6. a kind of any depth soil layer side friction device of measurement according to claim 5, it is characterized in that: the soil body
For according to the simulation soil body (106) of practical soil layer stratification state hierarchical simulation.
7. a kind of any depth soil layer side friction device of measurement according to claim 5, it is characterized in that: the detection
In frame (100), bottom plate (1001) is equipped at least one support base (1002), and the two sides of support base (1002) are located on shell
Equipped with limit base (108)；
It is equipped with by the position of two close end for supporting the load cylinder support (1003) for loading cylinder in bottom plate (1001).
8. a kind of any depth soil layer side friction device of measurement according to claim 5, it is characterized in that: in shell and passing
Displacement sensor (101) are equipped between power bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820951944.0U CN208270333U (en) | 2018-06-20 | 2018-06-20 | Measure any depth soil layer side friction device |
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| CN201820951944.0U CN208270333U (en) | 2018-06-20 | 2018-06-20 | Measure any depth soil layer side friction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844823A (en) * | 2018-06-20 | 2018-11-20 | 中交第二航务工程局有限公司 | Measure any depth soil layer side friction device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844823A (en) * | 2018-06-20 | 2018-11-20 | 中交第二航务工程局有限公司 | Measure any depth soil layer side friction device and method |
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