CN208537081U - Positive frozen soil Pore Pressure and ice pressure measuring device - Google Patents
Positive frozen soil Pore Pressure and ice pressure measuring device Download PDFInfo
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- CN208537081U CN208537081U CN201821109313.0U CN201821109313U CN208537081U CN 208537081 U CN208537081 U CN 208537081U CN 201821109313 U CN201821109313 U CN 201821109313U CN 208537081 U CN208537081 U CN 208537081U
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Abstract
The embodiment of the present application provides a kind of positive frozen soil Pore Pressure and ice pressure measuring device, which includes: temperature control device, soil sample tank, fixation member, seal member, pressometer；Soil sample tank is arranged inside temperature control device by fixation member, groove is formed between soil sample tank and temperature control device, it is the not congelative liquid in desired low temperature range that temperature, which transmits liquid,；Seal member is horizontally set on the open end of soil sample tank；One end of pressometer is inserted into inside soil sample tank after penetrating seal member, and the other end is located at the outside of soil sample tank, and not congelative liquid in the low temperature range of requirement is filled in the cavity of pressometer.Application scheme transmits liquid by temperature and cools down to the composite sample in soil sample tank, can accurate simulation composite sample freeze, the pore water pressure measured by pressometer is more acurrate.
Description
Technical field
This application involves frozen soil experiment equipment technical fields, specifically, this application involves a kind of positive frozen soil pore waters
Pressure and ice pressure measuring device.
Background technique
In native freezing process, the ice water pressure difference in the area Yi Dong is considered as the source of water translocation driving force, in this drive
Moisture never freezes area and migrates to the area Yi Dong under power acts on, and the moisture after migration undergoes phase transition glaciation in the area Yi Dong,
Lead to determinator for soil volume, frost heave occurs for the soil body, causes bulging, the distortion of highway, lifting by frost inclination of bridge and pole and tower foundation etc.
Freeze injury problem, when the soil body of frost heave melts, intensity can be reduced rapidly, and lead to the bases such as highway, bridge and shaft tower
Thaw settlement occurs, therefore, the pore water pressure and hole ice pressure studied in frozen soil have great importance.
In the prior art, common pore water pressure and pore ice device for pressure measurement, which are generally basede on, melts soil measurement pore water
Pressure and hole ice pressure, melting soil is frozen soil until start to be melted to and reach stabilization by consolidation under existing stress, this transition shape
The soil body of state, based on melting the pore water pressure measured under earthy state and hole ice pressure can not the positive frozen soil pore water of accurate response
Pressure and hole ice pressure, and be usually chloroform or the last of the ten Heavenly stems based on the liquid filled in the pore water pressure measurement device for melting soil
Alkane, both liquid have the disadvantage that at first point, and the chill point of chloroform is -63.5 DEG C, and the chill point of decane is -29.7
DEG C, chill point is easy to happen at low temperature to be freezed, and cannot achieve the process of simulation frozen soil, so that the positive frozen soil measured
Pore Pressure and hole ice pressure inaccuracy, second point, the density variation between both liquid and water cause pressure to pass
It passs and deviation occurs, again such that the pore water pressure inaccuracy in the positive frozen soil measured；Thirdly, both liquid exist easily
The defects of volatilizing, is toxic, inconvenience are applied to carry out the pore water pressure and pore ice pressure measurement in the positive frozen soil of analogue measurement
Experiment.
Therefore, technological deficiency in the prior art is: existing measuring device is that measurement is measured under earthy state based on melting
Pore water pressure and hole ice pressure, can not the positive frozen soil Pore Pressure of accurate response and hole ice pressure, and based on melting soil
Pore water pressure measurement device in the liquid filled be chloroform or decane, but also the pore water pressure measured is inaccurate
Really.
Utility model content
The purpose of the application is intended at least can solve above-mentioned one of technological deficiency, and especially existing measuring device is to survey
Amount, can not accurate measuring frozen Pore Pressure based on the measuring device for melting pore water pressure and hole ice pressure under earthy state
With the technological deficiency of hole ice pressure.
This application provides a kind of positive frozen soil Pore Pressure and ice pressure measuring device, which includes:
Temperature control device, soil sample tank, fixation member, seal member, pressometer；
One end of temperature control device is set as being open, for providing required low temperature range and holding for the measuring device
Stablize；
Soil sample tank is arranged inside temperature control device by fixation member, the shape of soil sample tank is spill, and soil sample tank is opened
Mouth direction is consistent with the opening direction of temperature control device, and the inside of soil sample tank is for storing composite sample；
Groove is formed between soil sample tank and temperature control device, groove transmits liquid for storage temperature, and temperature transmitting liquid is
The not congelative liquid in desired low temperature range, the temperature for transmitting liquid by temperature are that composite sample is dropped
Temperature；
Seal member is horizontally set on the open end of soil sample tank, for preventing temperature transmitting liquid from entering in soil sample tank；
One end of pressometer is inserted into inside soil sample tank after penetrating seal member, filling in the cavity of pressometer
Pressure transmits liquid, and it is the not congelative liquid in desired low temperature range that pressure, which transmits liquid, and examination is mixed in soil sample tank
When sample freezes, pressometer is used to measure pore water pressure when composite sample freezes, pressometer it is another
One end is located at the outside of soil sample tank, for the size of the pore water pressure measured to be transmitted to exterior terminal equipment.
Second aspect, this application provides a kind of positive frozen soil Pore Pressure and the measurement methods of hole ice pressure, should
Method includes:
During the positive jelly of composite sample, based on the phase equilibrium of ice water in composite sample, measurement temperature is obtained；
According to measurement temperature, obtains and surveyed by such as positive frozen soil Pore Pressure of first aspect and ice pressure measuring device
The pore water pressure of amount；
According to the solidification point of water, temperature and pore water pressure are measured, determines hole ice pressure.
Technical solution provided by the embodiments of the present application has the benefit that the measuring device by this programme, can mould
Quasi- Frozen Soil Process, i.e., adjusted temperature to low temperature by temperature control device, is transmitted liquid by temperature and is tried the mixing in soil sample tank
Sample cools down, and composite sample is made to start to freeze, since temperature transmitting liquid will not freeze in desired low temperature range, because
This, can accurate simulation composite sample freeze, mixing in composite sample freezing process, by pressometer to just freezing
Sample carries out the measurement of pore water pressure, since the pressure transmitting liquid filled in pressometer cavity is in desired low temperature model
It will not freeze in enclosing, therefore may make the pore water pressure measured more acurrate.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, institute in being described below to the embodiment of the present application
Attached drawing to be used is needed to be briefly described.
Fig. 1 is a kind of knot of positive frozen soil Pore Pressure and pore ice device for pressure measurement provided by the embodiments of the present application
Structure schematic diagram；
Fig. 2 is a kind of structural schematic diagram of pressometer provided by the embodiments of the present application；
Fig. 3 is a kind of circuit diagram of full-bridge circuit provided by the embodiments of the present application；
Fig. 4 is a kind of stream of positive frozen soil Pore Pressure and pore ice pressure measurement method provided by the embodiments of the present application
Cheng Tu；
Fig. 5 is a kind of knot of positive frozen soil Pore Pressure and pore ice pressure-measuring system provided by the embodiments of the present application
Structure schematic diagram；
Fig. 6 is a kind of knot of positive frozen soil Pore Pressure and pore ice pressure measurement terminal provided by the embodiments of the present application
Structure schematic diagram.
Wherein, 1, temperature control device, 2, temperature transmitting liquid, 3, soil sample tank, 4, fixation member, 5, seal member, 6, bolt,
7, top cover, 8, composite sample, 9, pressometer, 10, pressure control and measuring device, 11, hollow part, 12, sealing cover,
14, shell, 15, hydrostatic sensor, 16, closed cavity, 17, pressure transmitting liquid, 18, conducting wire, 19, hydraulic film, 201, pressure
Force container, 202, seal chamber, 203, force (forcing) pump, 204, sealing flange, 205, standard manometer, 206, test instrumentation, 207, defeated
Tracheae, 208, communicating pipe.
Specific embodiment
Embodiments herein is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the application, and cannot be construed to the limitation to the application.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, "one"
It may also comprise plural form with "the".It is to be further understood that wording " comprising " used in the description of the present application is
Refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition it is one or more
Other features, integer, step, operation, element, component and/or their group.It should be understood that when we claim element to be " connected "
Or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be intermediary elements.This
Outside, " connection " or " coupling " used herein may include being wirelessly connected or wirelessly coupling.Wording "and/or" packet used herein
Include one or more associated wholes for listing item or any cell and all combination.
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with attached drawing to the application embodiment party
Formula is described in further detail.
Positive frozen soil Pore Pressure provided by the present application and ice pressure measuring device, method, system, terminal and computer
Readable storage medium storing program for executing, it is intended to solve the technical problem as above of the prior art.
How the technical solution of the application and the technical solution of the application are solved with specifically embodiment below above-mentioned
Technical problem is described in detail.These specific embodiments can be combined with each other below, for the same or similar concept
Or process may repeat no more in certain embodiments.Below in conjunction with attached drawing, embodiments herein is described.
Embodiment one
The embodiment of the present application provides a kind of positive frozen soil Pore Pressure and ice pressure measuring device, as shown in Figure 1, should
Device includes:
Temperature control device 1, soil sample tank 3, fixation member 4, seal member 5, pressometer 9；
One end of temperature control device 1 is set as being open, for providing required low temperature range and guarantor for the measuring device
It is fixed to keep steady；
Soil sample tank 3 is arranged inside temperature control device 1 by fixation member 4, and the shape of soil sample tank 3 is spill, and soil sample tank 3
Opening direction it is consistent with the opening direction of temperature control device 1, the inside of soil sample tank 3 is for storing composite sample 8；
Groove is formed between soil sample tank 3 and temperature control device 1, groove transmits liquid 2 for storage temperature, and temperature transmits liquid
2 for density be greater than water and it is not soluble in water and in desired low temperature range not congelative liquid, for by temperature transmitting
The temperature of liquid 2 is that composite sample 8 cools down；
Seal member 5 is horizontally set on the open end of soil sample tank 3, for preventing temperature transmitting liquid 2 from entering soil sample tank 3
In；
One end of pressometer 9 is inserted into inside soil sample tank 3 after penetrating seal member 5, in the cavity of pressometer 9
Stuffing pressure transmits liquid 17, and it is that density is greater than water and not soluble in water and in desired low temperature range that pressure, which transmits liquid 17,
Not congelative liquid, when composite sample 8 freezes in soil sample tank 3, pressometer 9 is for measuring the hair of composite sample 8
Pore water pressure when life is freezed, the other end of pressometer 9 are located at the outside of soil sample tank 3, the pore water for will measure
The size of pressure is transmitted to exterior terminal equipment (not shown).
Scheme in the present embodiment as a result, by the measuring device of this programme, analog Frozen Soil Process passes through temperature control
Equipment 1 adjusts temperature to low temperature, transmits liquid 2 by temperature and cools down to the composite sample 8 in soil sample tank 3, makes to mix
Sample 8 starts to freeze, since temperature transmitting liquid 2 will not freeze in desired low temperature range, can accurate simulation it is mixed
Freezing for sample 8 is closed, in 8 freezing process of composite sample, hole is carried out to the composite sample 8 just freezed by pressometer 9
The measurement of gap water pressure, due to filled in 9 cavity of pressometer pressure transmitting liquid 17 in desired low temperature range not
It can freeze, therefore may make the pore water pressure measured more acurrate.
Embodiment two
The embodiment of the present application provides alternatively possible implementation, further includes implementing on the basis of example 1
Scheme shown in example two, wherein
Further, temperature transmitting liquid 2 and pressure transmitting liquid 17 are liquid alcohol, and liquid alcohol can guarantee its subzero temperature
Under do not freeze, and liquid alcohol is nontoxic, non-hazardous, suitable for experimental facilities.In addition, ethyl alcohol (alcohol) is passed as pressure
Liquid 17 is passed, chill point is -114 DEG C, meets all low temperature requirements in frozen soil field；Density and water are substantially close to pressure transmitting
It is smooth continuous；Viscosity is low, sensitive to pressure change, has very big adaptation for the measurement of pore water pressure low in frozen soil
Property.
Further, temperature control device 1 is temperature control cryostat.The settable target temperature of temperature control cryostat and cooling mode are to wherein
Temperature transmitting liquid 2 carry out cooling and constant temperature.
Further, the intersection of pressometer 9 and seal member 5 carries out sealing processing by glue.It does not destroy close
Seal the airtightness of component 5.
Further, seal member 5 is sealing film, and sealing film is fixed on the opening of soil sample tank 3 by fixing bolt 6
End.Sealing film has good deformation characteristic.
Further, fixation member 4 is vertical columns, can support and fixed soil sample tank 3 is in 1 bottom centre of temperature control device position
It sets.
Further, the material of soil sample tank 3 is Heat Conduction Material.Can play the role of it is good lead it is warm, by temperature transmit liquid 2
Temperature be transmitted to inside soil sample tank 3.
Further, device further include: hollow part 11 and sealing cover 12；
The height of hollow part 11 is higher than the height of temperature transmitting liquid 2, and hollow part 11 is vertically set on sealing
On part 5, and it is tightly connected with the through-hole on seal member 5；
Sealing cover 12 and the open end of hollow part 11 are detachably connected, and simulate drainage situation by the opening of sealing cover 12
The freezing process of lower composite sample 8 simulates the freezing process of composite sample 8 under not drainage situation by the closing of sealing cover 12.
Wherein, drainage situation refers to that the test device of positive frozen soil sample has a mass exchange with the external world, i.e., moisture can drain or
Person's supply.Drainage situation does not refer to being exactly that moisture cannot be drained and be fed, passing through hollow part without exchange of moisture with extraneous
11 and sealing cover 12 setting, it can be achieved that the freezing process of composite sample 8 and simulation be not under drainage situation under simulation drainage situation
The freezing process of composite sample 8, can pore water pressure to frozen soil positive under different situations and hole ice pressure study, to just
The research of pore water pressure and hole ice pressure in frozen soil provides effective data foundation.
Wherein, composite sample 8 is the sample being mixed to form according to a certain percentage by liquid water and soil particle.
Further, pressometer 9 includes shell 14, hydraulic film 19 and hydrostatic sensor 15；
The closed cavity 16 of 14 decomposition pressure meter 9 of shell；
Pressure is stored in closed cavity 16 and transmits liquid 17, and the hydraulic film 19 is arranged in the closed cavity 16
Wall, for collected pore water pressure to be passed to pressure transmitting liquid 17；
One end of hydrostatic sensor 15 is arranged inside closed cavity 16, and immerses in pressure transmitting liquid 17, hydraulic biography
Sensor 15 is used to receive the pore water pressure that pressure transmitting liquid 17 transmits, and the other end of hydrostatic sensor 15 connects transfer wire
18, transfer wire 18 is located at outside shell 14, for pore water pressure to be transmitted to exterior terminal equipment.
19 porous of hydraulic film transmit fluid pressures but can not be permeable, and solids pressure has passed through shell 14 and obstructed,
Solids pressure will not be passed to hydraulic film, by the setting of hydraulic film 19, the pore water pressure measured can be made more acurrate.
Further, the material of shell 14 is clay.14 porous of clay shell transmits fluid pressure but can not transmit solid
Body pressure keeps the pore water pressure measured more acurrate.
Further, the shape of pressometer 9 is cylinder.It is contacted convenient for comprehensive with composite sample 8, so that measuring
Pore water pressure it is more acurrate.
Wherein, based on the above-mentioned improvement to pressometer 9, the working principle of pressometer 9 are as follows:
In 8 freezing process of composite sample, 14 porous of shell transmits fluid pressure but can not transmit solids pressure, shell 14
Inside is equipped with the hydraulic film 19 that can be transmitted fluid pressure but can not be permeable, and water penetrates the ironed film 19 of 14 squeezed fluid of shell, so that
Hydraulic film 19 deforms, and after hydraulic film 19 is deformed, internal alcohol also has deformation, at this time just has the change of internal force
Change, the conduction of power is realized using the deformation of internal alcohol, so that pore water pressure to be passed to the liquid filled in hydraulic film 19
State alcohol, and then the pressure is detected by hydrostatic sensor 15, realize the detection of pore water pressure, hydrostatic sensor 15 will test
To pore water pressure be converted into electric signal and be transferred in exterior terminal equipment by conducting wire 18, wherein exterior terminal equipment can
For data collecting instrument.
It further, further include hydrostatic sensor calibration component, it includes pressure that hydrostatic sensor, which demarcates component, referring to Fig. 3
Container 201, force (forcing) pump 203, standard manometer 205 and test instrumentation 206；
Pressure vessel 201 is equipped with seal chamber 202, and force (forcing) pump 203 is inflated or taken out into seal chamber 202 by appendix 207
Gas；
Hydrostatic sensor 15 is arranged in seal chamber 202, and standard manometer 205 and test instrumentation 206 apply for measuring
In the pressure of hydrostatic sensor 15, test instrumentation 206 is connect with the output end of hydrostatic sensor 15, for obtaining hydrostatic sensor
15 pressure reading.
Wherein, when being demarcated to hydrostatic sensor 15, hydrostatic sensor 15 is goed deep by the open end of seal chamber 202
In seal chamber 202, then by sealing flange 204 open end of seal chamber 202 is sealed up.It is removable that hydrostatic sensor demarcates component
The outer wall that positive frozen soil Pore Pressure and ice pressure measuring device are set is unloaded, convenient for passing through the hydraulic sensing before the experiments
Device demarcates component and carries out positive/negative-pressure calibration to hydrostatic sensor 15.
When carrying out pore water pressure measurement experiment, because after hydraulic film 19 generates deformation, the chamber of pressometer 9
Intracorporal pressure transmitting liquid 17 also has deformation, and the variation of internal force is at this time just had in cavity, therefore, in order to make to measure
Pore water pressure is more acurrate, first to carry out positive/negative-pressure calibration to hydrostatic sensor 15 before experiment.
Wherein, the principle that component carries out positive/negative-pressure calibration to hydrostatic sensor 15 is demarcated by hydrostatic sensor are as follows:
When carrying out normal pressure calibration using normal pressure of the above-mentioned hydrostatic sensor calibration component to hydrostatic sensor 15, use
Force (forcing) pump 203 is inflated by appendix 207 into seal chamber, applies positive pressure into seal chamber, and simulation positive pressure tests environment, standard
The measurement of manometer 205 is applied to the pressure value of hydrostatic sensor 15 in the case where positive pressure tests environment, also the positive pressure as in seal chamber
Force value, test instrumentation 206 can read the pressure reading of the hydrostatic sensor 15 in the case where positive pressure tests environment simultaneously, surveyed and pressed according to standard
Between reading and test instrumentation 206 reading the calibration positive pressure value collected of hydrostatic sensor 15 and reference pressure value of meter 205
Corresponding relationship, to obtain the positive pressure calibration curve of hydrostatic sensor 15.Similarly, component is demarcated using above-mentioned hydrostatic sensor
When carrying out negative pressure calibration to the negative pressure measurement range of hydrostatic sensor 15, it is evacuated using force (forcing) pump 203 into seal chamber, to
Apply negative pressure in seal chamber, simulation negative pressure tests environment, and the measurement of standard manometer 205 is applied to hydraulic in the case where negative pressure tests environment
The pressure value of sensor 15, also the negative pressure force value as in seal chamber, test instrumentation 206 are can read simultaneously in negative pressure test environment
The pressure reading of lower calibration hydrostatic sensor 15, it is hydraulic according to the reading of standard manometer 205 and the reading calibration of test instrumentation 206
Corresponding relationship between the negative pressure force value collected of sensor 15 and reference pressure value, to obtain the negative pressure of hydrostatic sensor 15
Calibration curve.Therefore, which demarcates component with 15 positive pressure calibrating function of hydrostatic sensor and hydrostatic sensor
15 negative pressure calibrating functions realize the positive and negative two-way calibration of hydrostatic sensor 15, and then improve 15 test data of hydrostatic sensor
Accuracy, moreover it is possible to calibration cost be effectively reduced, simplify positive and negative two-way calibration, and then calibration cost can be reduced, simplify proving operation
Step, the operating procedure of calibration, it is only necessary to it is successively inflated, is evacuated to seal chamber by force (forcing) pump 203, without
Hydrostatic sensor 15 is repeatedly installed.
Further, the communicating pipe 208 protruded into seal chamber, the pressure in seal chamber are installed on standard manometer 205
Power is by passing to standard manometer 205 communicating pipe 208.
Be installed, the pressure in seal chamber passes through communicating pipe the communicating pipe 208 protruded into seal chamber on standard manometer 205
208 pass to standard manometer 205, so that standard manometer 205 can accurately measure the pressure value in seal chamber,
Accurately measure the pressure value that measurement is applied to hydrostatic sensor 15.The precision of standard manometer 205 is higher than the overwhelming majority often
The precision for seeing pressure sensor ensure that the accuracy of calibration process, such as DATA-52 Series Pressure meter.
Further, device further include: pressure control and measuring device 10；
Pressure control and measuring device 10 are arranged on seal member 5, for providing different pressure for composite sample 8,
And detect corresponding pressure size.
Solidification point can change when composite sample 8 is under different pressures state, and pressure is bigger, and solidification point is got over
It is low, then influence its phase transition process, simultaneously because in composite sample 8 between soil particle pressure change, lead to pore water pressure
It can change with hole ice pressure, pressure control and measuring device 10 can provide normal pressure and survey simultaneously for composite sample 8
Measure normal pressure number.The variation that pore water pressure when composite sample 8 freezes under different pressures effect can be obtained, analyzes its rule
Rule, provides richer data foundation for the research of pore water pressure.
Further, device further include: top cover 7；The top of seal member 5 is arranged in top cover 7, for further preventing temperature
Degree transmitting liquid 2 enters soil sample tank 3.
Further, the material of top cover 7 is high rigidity lightweight solid material.
Further, device further includes timing collecting device；
Timing collecting device is connect with pressometer 9, is arranged outside measuring device, and timing acquiring composite sample is used for
8 pore water pressure during positive freeze.
Further, timing collecting device includes that sequentially connected data collector, timer, storage card and data are led
Module out, data collector are connect with pressometer 9 by cable, and data collector is used for the time according to timer setting
Pore water pressure of the interval acquisition composite sample 8 during positive freeze, collected pore water pressure is transmitted to outer by storage card
Portion's terminal device.
Further, which further includes wireless transmitter, and wireless transmitter is connect with hydrostatic sensor 15, is used for hole
Gap water pressure passes to exterior terminal equipment.
Pore water pressure is wirelessly passed to exterior terminal equipment by wireless transmitter, so that administrator
Member the pore water pressure force value can be monitored by the exterior terminal equipment, without by wired mode come
Pore water pressure value is obtained, waterproof failure caused by wired wire laying mode is also avoided by wireless transmission method, to lure
The problem of sending out underground engineering water damage.
The measurement of pore water pressure and hole ice pressure, detailed process are carried out by the measuring device in this programme as a result,
It is as follows: liquid water and soil particle being carried out to be mixed to form composite sample 8 according to a certain percentage, are fitted into soil sample tank 3, is installed closed
Component and top cover 7, it is fixed using fixing bolt 6；Then by the temperature that is arranged in temperature control device 1 to temperature transmit liquid 2 into
Row cooling, so that the composite sample 8 in soil sample tank 3 starts to freeze, in 8 freezing process of composite sample, is led to by soil sample tank 3
Excess pressure meter 9 acquires pore water pressure, detailed process are as follows: transmits liquid 17 by pressure and pore water pressure is passed to liquid
Pore water pressure is converted electric signal by pressure sensor 15, hydrostatic sensor 15, is transmitted to exterior terminal equipment by conducting wire 18.Base
In the pore water pressure measured, it is based on broad sense Clapyron Equation, the pressure of pore ice can be calculated, and then realize to pore water
The measurement of pressure, hole ice pressure.Further, by the opening and closing of sealing cover 12, under analog drainage situation and not
Positive Frozen Soil Process under drainage situation obtains the experimental data under both of these case, i.e. pore water pressure and hole ice pressure；Into
One step, based on pressure control and measuring device 10；It can measure the pore water pressure and hole of composite sample 8 at various pressures
Ice pressure；Further, by timing collecting device, it can measure and obtain the hole that composite sample 8 is under different frozen states
Water pressure and hole ice pressure, so that the experimental data obtained is richer, for water translocation driving force in native freezing process
The Accurate Prediction of the physical mechanics process such as segregated ice and frost heave of calculating has great importance.
Embodiment three
Referring to fig. 4, the embodiment of the present application provides the measurement side of a kind of positive frozen soil Pore Pressure and hole ice pressure
Method, this method comprises:
Step S101, based on the phase equilibrium of ice water in composite sample 8, is obtained and is surveyed during the positive jelly of composite sample 8
Amount temperature.
Wherein, measurement temperature is the temperature that temperature control device 1 provides.
Step S102 is obtained and is measured by positive frozen soil Pore Pressure and ice pressure measuring device according to measurement temperature
Pore water pressure.
Wherein, positive frozen soil Pore Pressure and ice pressure measuring device are that the measurement in embodiment one and embodiment two fills
It sets.
Step S103 measures temperature and pore water pressure, determines hole ice pressure according to the solidification point of water.
Scheme in the present embodiment as a result, passes through the measuring device in embodiment one and embodiment two, analog frozen soil mistake
Journey is adjusted temperature to low temperature by temperature control device 1, by temperature transmit liquid 2 to the composite sample 8 in soil sample tank 3 into
Row cooling, makes composite sample 8 start to freeze, since temperature transmitting liquid 2 will not freeze in desired low temperature range,
Can accurate simulation composite sample 8 freeze, mixing in 8 freezing process of composite sample, by pressometer 9 to just freezing
Sample 8 carries out the measurement of pore water pressure, since the pressure transmitting liquid 17 filled in 9 cavity of pressometer is requiring
Not congelative liquid in low temperature range, therefore may make the pore water pressure measured more acurrate.
Example IV
The embodiment of the present application provides alternatively possible implementation, further includes implementing on the basis of embodiment three
Scheme shown in example four, wherein
Further, according to the solidification point of water, temperature and pore water pressure is measured, determines hole ice pressure, comprising:
According to the solidification point of water, temperature and pore water pressure are measured, hole is calculated by broad sense Clapyron Equation
Gap ice pressure.
Wherein, ice water phase transformation is that ice, water two-phase substance reach the mistake of physical equilibrium and chemical balance in pure water freezing process
Journey, in this process, ice, the temperature of water two-phase and pressure are all equal, can be described with classical Clapyron Equation, such as formula
(1) shown in:
Wherein, ρwIt is the density of water；ρiIt is the density of ice；U=uw=uiIt is the pressure for not freezing water and ice；L is ice water phase transformation
Latent heat；T is the temperature of ice water system；TfFor the solidification point of water.
And for when ice water reaches phase equilibrium, not freezing in the three-phase porous media of positive frozen soil particle-water-ice composition
Pore water pressure and hole ice pressure are unequal, i.e. uw≠ui.Under these conditions, Clapyron Equation is modified, is obtained
To the broad sense Clapyron Equation for being suitble to positive frozen soil three-phase medium ice water equilibrium phase change, as shown in formula (2):
Wherein, system temperature T is in phase transition temperature interval, meets Ts≤T≤Tf(TsFor the supercooling temperature of water, i.e. measurement temperature
Degree).
Wherein, ice pressure subtracts water pressure and obtains ice water pressure difference value, which is the driving force of water translocation.Led in the past
It crosses the modes such as hypothesis to obtain, now by measuring and being calculated, the driving force of the water translocation made is more acurrate, and moisture moves
The driving force of shifting can be applied in frost heave model, realize that the Accurate Prediction of the processes such as frost heave, segregated ice calculates.
Wherein, pore water pressure and ice pressure should be equal when being freezed by formula (1) available pure water, and should be
The average pressure of measuring device can measure this pressure by measuring device, at this time can be by the numerical value mark of pressometer 9
It is set to measured pressure value, multiple pressure calibration values can be obtained when different temperatures is freezed, calibration curve is formed, to guarantee
The numerical value of measuring device measurement is all correct.
Ice, water pressure problem are that main mechanical problem and soil involved in ice water phase transition process freeze in positive frozen soil
In the process driving force from moisture to segregated ice interfacial migration main source.Therefore, accurate to determine ice pressure in native freezing process
With the size of water pressure, calculating for water translocation driving force in native freezing process, the physical mechanics such as segregated ice and frost heave
The Accurate Prediction of process has great importance.
Embodiment five
The embodiment of the present application provides the measuring system 20 of a kind of positive frozen soil Pore Pressure and hole ice pressure, such as schemes
Shown in 5, which may include: measurement temperature acquisition module 211, pore water pressure measurement module 212 and hole ice pressure
Determining module 213, wherein
Temperature acquisition module 211 is measured, for during the positive jelly of composite sample 8, based on ice water in composite sample 8
Phase equilibrium obtains measurement temperature.
Pore water pressure measurement module 212, for obtaining and passing through positive frozen soil Pore Pressure and ice according to measurement temperature
The pore water pressure of device for pressure measurement measurement.
Wherein, positive frozen soil Pore Pressure and ice pressure measuring device are that the measurement in embodiment one and embodiment two fills
It sets.
Hole ice pressure determining module 213 measures temperature and pore water pressure for the solidification point according to water, determines
Hole ice pressure.
Scheme in the present embodiment as a result, passes through the measuring device in embodiment one and embodiment two, analog frozen soil mistake
Journey is adjusted temperature to low temperature by temperature control device 1, by temperature transmit liquid 2 to the composite sample 8 in soil sample tank 3 into
Row cooling, makes composite sample 8 start to freeze, since temperature transmitting liquid 2 will not freeze in desired low temperature range,
Can accurate simulation composite sample 8 freeze, mixing in 8 freezing process of composite sample, by pressometer 9 to just freezing
Sample 8 carries out the measurement of pore water pressure, since the pressure transmitting liquid 17 filled in 9 cavity of pressometer is requiring
Not congelative liquid in low temperature range, therefore may make the pore water pressure measured more acurrate.
Embodiment six
The embodiment of the present application provides alternatively possible implementation, further includes implementing on the basis of embodiment three
Scheme shown in example four, wherein
Further, in hole ice pressure determining module 213, according to the solidification point of water, temperature and pore water pressure are measured
Power determines hole ice pressure, comprising:
According to the solidification point of water, temperature and pore water pressure are measured, hole is calculated by broad sense Clapyron Equation
Gap ice pressure.
Wherein, ice water phase transformation is that ice, water two-phase substance reach the mistake of physical equilibrium and chemical balance in pure water freezing process
Journey, in this process, ice, the temperature of water two-phase and pressure are all equal, can be described with classical Clapyron Equation, such as formula
(1) shown in:
Wherein, ρwIt is the density of water；ρiIt is the density of ice；U=uw=uiIt is the pressure for not freezing water and ice；L is ice water phase transformation
Latent heat；T is the temperature of ice water system；TfFor the solidification point of water.
And for when ice water reaches phase equilibrium, not freezing in the three-phase porous media of positive frozen soil particle-water-ice composition
Pore water pressure and hole ice pressure are unequal, i.e. uw≠ui.Under these conditions, Clapyron Equation is modified, is obtained
To the broad sense Clapyron Equation for being suitble to positive frozen soil three-phase medium ice water equilibrium phase change, as shown in formula (2):
Wherein, system temperature T is in phase transition temperature interval, meets Ts≤T≤Tf(TsFor the supercooling temperature of water, i.e. measurement temperature
Degree).
Wherein, ice pressure subtracts water pressure and obtains ice water pressure difference value, which is the driving force of water translocation.Led in the past
It crosses the modes such as hypothesis to obtain, now by measuring and being calculated, the driving force of the water translocation made is more acurrate, and moisture moves
The driving force of shifting can be applied in frost heave model, realize that the Accurate Prediction of the processes such as frost heave, segregated ice calculates.
Wherein, pore water pressure and ice pressure should be equal when being freezed by formula (1) available pure water, and should be
The average pressure of measuring device can measure this pressure by measuring device, at this time can be by the numerical value mark of pressometer 9
It is set to measured pressure value, multiple pressure calibration values can be obtained when different temperatures is freezed, calibration curve is formed, to guarantee
The numerical value of measuring device measurement is all correct.
Ice, water pressure problem are that main mechanical problem and soil involved in ice water phase transition process freeze in positive frozen soil
In the process driving force from moisture to segregated ice interfacial migration main source.Therefore, accurate to determine ice pressure in native freezing process
With the size of water pressure, calculating for water translocation driving force in native freezing process, the physical mechanics such as segregated ice and frost heave
The Accurate Prediction of process has great importance.
Embodiment seven
The embodiment of the present application provides the measuring terminals 30 of a kind of positive frozen soil Pore Pressure and hole ice pressure, such as schemes
Shown in 6, terminal 30 shown in fig. 6 includes: processor 301 and memory 303.Wherein, processor 301 is connected with memory 303,
Such as it is connected by bus 302.Optionally, which can also include transceiver 304.It should be noted that in practical application
Transceiver 304 is not limited to one, and the structure of the terminal 30 does not constitute the restriction to the embodiment of the present application.
Wherein, processor 301 is applied in the embodiment of the present application, for realizing temperature acquisition module is measured shown in Fig. 5
211, the function of pore water pressure measurement module 212 and hole ice pressure determining module 213.Transceiver 304 include receiver and
Transmitter.
Processor 301 can be CPU, general processor, DSP, ASIC, FPGA or other programmable logic device, crystalline substance
Body pipe logical device, hardware component or any combination thereof.It, which may be implemented or executes, combines described by present disclosure
Various illustrative logic blocks, module and circuit.Processor 301 is also possible to realize the combination of computing function, such as wraps
It is combined containing one or more microprocessors, DSP and the combination of microprocessor etc..
Bus 302 may include an access, and information is transmitted between said modules.Bus 302 can be pci bus or EISA
Bus etc..Bus 302 can be divided into address bus, data/address bus, control bus etc..For convenient for indicating, in Fig. 6 only with one slightly
Line indicates, it is not intended that an only bus or a type of bus.
Memory 303 can be ROM or can store the other kinds of static storage device of static information and instruction, RAM
Or the other kinds of dynamic memory of information and instruction can be stored, it is also possible to EEPROM, CD-ROM or other CDs
Storage, optical disc storage (including compression optical disc, laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc etc.), magnetic disk storage medium
Or other magnetic storage apparatus or can be used in carry or store have instruction or data structure form desired program generation
Code and can by any other medium of computer access, but not limited to this.
Optionally, memory 303 be used for store execution application scheme application code, and by processor 301
Control executes.Processor 301 is for executing the application code stored in memory 303, to realize that embodiment illustrated in fig. 5 mentions
The movement of the measuring system 20 of the positive frozen soil Pore Pressure and hole ice pressure that supply.
The measuring terminals 30 of a kind of positive frozen soil Pore Pressure provided by the embodiments of the present application and hole ice pressure, and it is existing
There is technology to compare, by the measuring device in embodiment one and embodiment two, analog Frozen Soil Process passes through temperature control device 1
Temperature is adjusted to low temperature, liquid 2 is transmitted by temperature and is cooled down to the composite sample 8 in soil sample tank 3, composite sample 8 is made
Start to freeze, since temperature transmitting liquid 2 will not freeze in desired low temperature range, can accurate simulation composite sample 8
Freeze, in 8 freezing process of composite sample, pore water pressure is carried out to the composite sample 8 that is just freezing by pressometer 9
Measurement, due to filled in 9 cavity of pressometer pressure transmitting liquid 17 will not freeze in desired low temperature range, because
This may make the pore water pressure measured more acurrate.
The measuring terminals 30 of a kind of positive frozen soil Pore Pressure provided by the embodiments of the present application and hole ice pressure are applicable in
20 embodiment of system in above-described embodiment five, and there is inventive concept identical with the above system embodiment five and identical
Beneficial effect, details are not described herein.
Embodiment eight
The embodiment of the present application provides a kind of computer readable storage medium, which is stored at least one finger
It enables, at least one section of program, code set or instruction set, at least one instruction, at least one section of program, code set or instruction set are by handling
Device is loaded and is executed to realize method shown in embodiment five.
The embodiment of the present application provides a kind of computer readable storage medium, compared with prior art,
By the measuring device in embodiment one and embodiment two, analog Frozen Soil Process that is, will be warm by temperature control device 1
Degree is adjusted to low temperature, is transmitted liquid 2 by temperature and is cooled down to the composite sample 8 in soil sample tank 3, starts composite sample 8
Freeze, due to temperature transmitting liquid 2 will not freeze in desired low temperature range, can accurate simulation composite sample 8 jelly
Knot carries out the survey of pore water pressure by pressometer 9 in 8 freezing process of composite sample to the composite sample 8 just freezed
Amount, since the pressure transmitting liquid 17 filled in 9 cavity of pressometer is the not congelative liquid in desired low temperature range
Body, therefore may make the pore water pressure measured more acurrate.
The embodiment of the present application provides a kind of computer readable storage medium, which is stored at least one finger
It enables, at least one section of program, code set or instruction set, at least one instruction, at least one section of program, code set or instruction set are by handling
Device is loaded and is executed to realize method shown in embodiment six.Details are not described herein.
It should be understood that although each step in the flow chart of attached drawing is successively shown according to the instruction of arrow,
These steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, can execute in the other order.Moreover, at least one in the flow chart of attached drawing
Part steps may include that perhaps these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, execution sequence, which is also not necessarily, successively to be carried out, but can be with other
At least part of the sub-step or stage of step or other steps executes in turn or alternately.
The above is only some embodiments of the application, it is noted that those skilled in the art are come
It says, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
The protection scope of the application.
Claims (10)
1. a kind of positive frozen soil Pore Pressure and ice pressure measuring device characterized by comprising temperature control device, soil sample tank,
Fixation member, seal member, pressometer；
One end of the temperature control device is set as being open, for providing required low temperature range and holding for the measuring device
Stablize；
The soil sample tank is arranged inside the temperature control device by the fixation member, and the shape of the soil sample tank is spill,
And the opening direction of the soil sample tank is consistent with the opening direction of the temperature control device, the inside of the soil sample tank is mixed for storing
Close sample；
Groove is formed between the soil sample tank and the temperature control device, the groove transmits liquid, the temperature for storage temperature
Degree transmitting liquid is the not congelative liquid in desired low temperature range, and the temperature for transmitting liquid by the temperature is
The composite sample cools down；
The seal member is horizontally set on the open end of the soil sample tank, for preventing described in the temperature transmitting liquid entrance
In soil sample tank；
One end of the pressometer is inserted into inside the soil sample tank after penetrating the seal member, the pressometer
Cavity in stuffing pressure transmit liquid, pressure transmitting liquid is the not congelative liquid in desired low temperature range,
When composite sample freezes in the soil sample tank, when the pressometer freezes for measuring the composite sample
Pore water pressure, the other end of the pressometer is located at the outside of the soil sample tank, the pore water pressure for will measure
The size of power is transmitted to exterior terminal equipment.
2. the apparatus according to claim 1, which is characterized in that described device further include: hollow part and sealing cover；
The height of the hollow part is higher than the height of temperature transmitting liquid, and being vertically set on for the hollow part is described
On seal member, and it is tightly connected with the through-hole on the seal member；
The open end of the sealing cover and the hollow part is detachably connected, and passes through the opening simulation draining feelings of the sealing cover
The freezing process of composite sample under condition, by the closing simulation of the sealing cover, composite sample did not freezed under drainage situation
Journey.
3. the apparatus according to claim 1, which is characterized in that the pressometer includes shell, hydraulic film and liquid
Pressure sensor；
The shell forms the closed cavity of the pressometer；
Pressure is stored in the closed cavity and transmits liquid, and the hydraulic film is arranged in the inner wall of the closed cavity, is used for
Collected pore water pressure is passed into pressure transmitting liquid；
One end of the hydrostatic sensor is arranged inside the closed cavity, and immerses in the pressure transmitting liquid, described
Hydrostatic sensor is used to receive the pore water pressure of the pressure transmitting liquid transmitting, the other end connection of the hydrostatic sensor
Transfer wire, the transfer wire is located at the shell exterior, for the pore water pressure to be transmitted to exterior terminal equipment.
4. device according to claim 3, which is characterized in that described device further includes hydrostatic sensor calibration component, institute
Stating hydrostatic sensor calibration component includes pressure vessel, force (forcing) pump, standard manometer and test instrumentation；
The pressure vessel is equipped with seal chamber, and the force (forcing) pump is inflated or is evacuated into seal chamber by appendix；
The hydrostatic sensor is arranged in the seal chamber, and the standard manometer and the test instrumentation apply for measuring
In the pressure of the hydrostatic sensor, the test instrumentation is connect with the output end of the hydrostatic sensor, described for obtaining
The pressure reading of hydrostatic sensor.
5. device according to claim 4, which is characterized in that be equipped on the standard manometer and protrude into the seal chamber
In communicating pipe, the pressure in the seal chamber is by passing to the standard manometer communicating pipe.
6. the apparatus according to claim 1, which is characterized in that described device further include: pressure control and measuring device；
The pressure control and measuring device are arranged on the seal member, for providing different pressures for the composite sample
Power, and detect corresponding pressure size.
7. the apparatus according to claim 1, which is characterized in that described device further include: top cover；The top cover is arranged in institute
The top for stating seal member, for preventing the temperature transmitting liquid from entering the soil sample tank.
8. the apparatus according to claim 1, which is characterized in that described device further include: timing collecting device；
The timing collecting device is connect with the pressometer, for composite sample described in timing acquiring during positive freeze
Pore water pressure.
9. device according to claim 8, which is characterized in that the timing collecting device includes that sequentially connected data are adopted
Storage, timer, storage card and data export module；
The data collector is connect with the pressometer by cable, and the data collector is used for according to the timing
The time interval of device setting acquires pore water pressure of composite sample during positive freeze, and the storage card will be collected
Pore water pressure is transmitted to exterior terminal equipment.
10. device according to claim 4, which is characterized in that described device further include: wireless transmitter；
The wireless transmitter is connect with the hydrostatic sensor, is used for the collected pore water pressure of the hydrostatic sensor
Pass to exterior terminal equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821109313.0U CN208537081U (en) | 2018-07-11 | 2018-07-11 | Positive frozen soil Pore Pressure and ice pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821109313.0U CN208537081U (en) | 2018-07-11 | 2018-07-11 | Positive frozen soil Pore Pressure and ice pressure measuring device |
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|---|---|
| CN208537081U true CN208537081U (en) | 2019-02-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068415A (en) * | 2018-07-11 | 2019-07-30 | 内蒙古大学 | Positive frozen soil Pore Pressure and ice pressure measuring device and method |
| CN110118628A (en) * | 2019-05-28 | 2019-08-13 | 中国科学院寒区旱区环境与工程研究所 | Frozen soil pore water pressure measurement device |
-
2018
- 2018-07-11 CN CN201821109313.0U patent/CN208537081U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068415A (en) * | 2018-07-11 | 2019-07-30 | 内蒙古大学 | Positive frozen soil Pore Pressure and ice pressure measuring device and method |
| CN110068415B (en) * | 2018-07-11 | 2024-04-02 | 内蒙古大学 | Device and method for measuring pore water pressure and ice pressure in normal frozen soil |
| CN110118628A (en) * | 2019-05-28 | 2019-08-13 | 中国科学院寒区旱区环境与工程研究所 | Frozen soil pore water pressure measurement device |
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Effective date of registration: 20230506 Address after: Room 102, Building 26, No. 189 Hongcan Road, Hongkeng Farm, Economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province, 311200 Patentee after: Zhejiang Danfu Environmental Technology Co.,Ltd. Address before: 010070 A204, Transportation Building, Danan Campus, No. 24 Zhaojun Road, Yuquan District, Hohhot City, Inner Mongolia Autonomous Region Patentee before: INNER MONGOLIA University |