CN109884112A - A kind of native frost heave detection device and its detection method of no external power supply - Google Patents
A kind of native frost heave detection device and its detection method of no external power supply Download PDFInfo
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- CN109884112A CN109884112A CN201910240854.XA CN201910240854A CN109884112A CN 109884112 A CN109884112 A CN 109884112A CN 201910240854 A CN201910240854 A CN 201910240854A CN 109884112 A CN109884112 A CN 109884112A
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Abstract
A kind of native frost heave detection device and its detection method of no external power supply.In cold regions engineering construction, the frost-heaving deformation of frozen soil monitors big difficulty, low efficiency, existing native frost heave detection device and needs lasting external application power supply mostly, makes earth's surface cooperate instrument and equipment more accordingly, takes up a large area, it is more to destruction of surface place, it is complex for operation step.Chassis is equipped with casing in the present invention, and the upper end of casing is fixedly connected with anchor disk, and spring element is arranged in casing, and the force side of tension sensor passes through upper anchor disk and is connected with one end of spring element, and the other end of spring element is connected by connecting rod with chassis；Method of the invention is the native frost heave detection device of corresponding installation one at each measuring point, the frost heaving amount data of frost heave layer where obtaining each measuring point of different periods by native frost heave detection device, obtain Frost heave of frozen soil deformation in test zone according to the frost heaving amount data summarization that each measuring point is fed back.The present invention is used for the monitoring of Frost heave of frozen soil amount.
Description
Technical field
The invention belongs to technical field of civil engineering, and in particular to a kind of native frost heave detection device and its inspection of no external power supply
Survey method.
Background technique
China is frozen soil third big country, the world, and seasonal frozen ground accounts for Chinese territory half of the area or more.Work is built in permafrost region
Journey structures cause engineering project disaster case innumerable due to frost heave and thaw collapse.No matter laboratory frost heave and thaw collapse development
Journey or construction site accurately obtain the characteristic value of Frost heave of frozen soil deformation, require reliable detection device and method.However, existing
Due to the various regions depth of freezing, the difference of geological conditions, frozen-heave factor value differs greatly, it is therefore desirable to obtain for field body frost heaving deformation
The actual value of engineering construction region frost-heaving deformation.An important means for obtaining body frost heaving is field observation seasonality frost heave layer
Frost heaving amount, such as embedding several frost heaves nail, fixed frost heave follows closely spacing, the elevation followed closely with level periodic observation frost heave.By each
Frost heave follows closely the frost heaving amount of the variable quantity reflection each point of elevation.If frost heaving amount variation is small, elevation variation is followed closely by monitoring frost heave
It is difficult to meet required precision；Patent of invention be " CN104929098A field observation seasonal frozen soil region high-speed railway soil layer frost heave
Hole, the embedding disk that casts anchor, with equal diameter joint connection measuring staff displacement meter and upper anchor are excavated in method and device " proposition in frozen soil layer
Disk, seasonal frozen ground layer frost-heaving deformation drive upper and lower anchor disk mobile, the frost heaving amount of season frozen soil layer are observed by measuring staff displacement meter.
It is lifted on upper anchor disk after body frost heaving deformation in order to prevent, the low temperature grease of upper anchor disk and plastic tube, filling forms vacuum cavity,
Anchor disk in negative-pressure adsorption is generated, snorkel is installed in upper anchor disk, reaches snorkel outside soil layer, venthole one side and outside
Connection disturbs soil temperature, on the other hand limits the horizontally disposed of the device.Patent " CN103966993A body frost heaving inspection
Survey device and detection body frost heaving amount method ", detection hole is excavated in frost heave layer, tube body and measuring staff are fixed on not by anchoring piece
In frost heave layer, deviation meter is set at the aperture of detection hole, multiple annular weakening regions are arranged at intervals on tube body, when the soil body freezes
When swollen, tube body is divided into the pipeline section of multiple energy self-movements by weakening region, guarantees that the datum mark of body frost heaving measurement does not change.
The drawbacks of measuring device, is arranged at earth's surface in the aperture of detection hole, and earth's surface need to be arranged in deviation meter, cannot obtain
The some region of frost-heaving deformation in underground, the gap filling filler between tube body and detection hole hole wall are non-weakening region filling concrete
Pouring layer, and weakening region fills loose sand layer.The backfill respectively of two kinds of fillers this may result in the generation of observation area soil strength variation
Change, directly affects measurement result；
The means of laboratory measurement soil sample frost heave displacement mostly use amesdial, spring pumping rod displacement sensor, strain gauge etc.,
Due to these means must and sample contacts, it is not intended in given sample one restraining force, to reduce accuracy of measurement.Patent
(a kind of 201410068723.5 device of laser sensor measuring frozen frost heave displacement), which proposes, utilizes laser displacement sensor
In the case where not contacting soil sample, the frost heave displacement of precise measurement frozen soil, easy to operate, reliably, greatly improves the survey of test
Efficiency and precision are tried, but this method only can be suitably used for laboratory soil sample at present, it is impossible to be used in construction site.Same patent
" a kind of force model comprehensive test system for considering soil body harmomegathus characteristic under temperature gradient of CN108572189A ",
" CN108519405A is a set of for studying the testing equipment of power and deformation relationship during body frost heaving ", " CN108445192A
A kind of multi-functional frost heave, thaw collapse experimental rig ", " a kind of body frost heaving rate measuring device of CN108333323A and measurement method ",
" a kind of controllable temperature body frost heaving experimental rig of CN207557254U " etc. is all that sensor is placed in soil body external monitoring is entire
The frost-heaving deformation of the soil body, experimental rig or pilot system suitable for laboratory simulation field environmental condition.
Therefore, during soil body Frozen-thawed cycled during frost-heaving deformation and construction freezing method in horizontal or vertical direction
The monitoring of deformation is of great significance to Frozen Ground Area infrastructure construction, need the deformation of live body frost heaving it is accurate, it is reliable and
Quick obtaining means.In short, due to construction field geology complicated condition and laboratory part body frost heaving and thaw collapse process
Research need, the frost-heaving deformation of frozen soil monitoring difficulty is big, poor accuracy, result in Frozen Ground Area infrastructure construction quality by
To seriously affecting, do not solved very well so far.Especially show as existing native frost heave detection device need mostly it is lasting outer
With power supply, earth's surface is made to cooperate instrument and equipment more accordingly, structure is complicated, takes up a large area, to more in place of destruction of surface, behaviour
Make complex steps.
Summary of the invention
The object of the present invention is to provide a kind of native frost heave detection device and detection methods, to solve due to construction site
The research of matter complicated condition and laboratory part body frost heaving and thaw collapse process needs, and the frost-heaving deformation of frozen soil monitors difficulty
Greatly, poor accuracy and lead to Frozen Ground Area infrastructure construction quality control the problem of being difficult to ensure.
The technical solution adopted by the present invention to solve the above technical problem is:
A kind of native frost heave detection device of no external power supply, it includes chassis, casing, upper anchor disk, tension sensor, elastic force
Part and connecting rod are provided with casing on the chassis, and the upper end of casing is fixedly connected with anchor disk, and spring element is arranged in casing
Interior, the force side of tension sensor passes through upper anchor disk and is connected with one end of spring element, and the other end of spring element passes through connecting rod
It is connected with chassis.
As a preferred solution: being provided with inner cylinder on chassis, chassis is coaxially disposed with inner cylinder and the two is fixedly connected and is made as one
Body, on the inner cylinder, the inner wall of casing and the outer wall of inner cylinder are slidably matched the lower end suit of casing.
As a preferred solution: tension sensor is coupling type electronic balance.
As a preferred solution: being provided with shield on upper anchor disk.
As a preferred solution: spring element is spring.
It is real using a kind of native frost heave detection device of no external power supply described in specific embodiment one, two, three, four or five
Existing detection method determines the distribution position of measuring point number and each measuring point in test zone according to the frozen ground types of test zone
It sets, one native frost heave detection device without external power supply of corresponding installation, passes through the native frost heave of no external power supply at each measuring point
The frost heaving amount data of frost heave layer, the frost heaving amount number fed back according to each measuring point where detection device obtains each measuring point of different periods
According to summarizing to obtain Frost heave of frozen soil deformation in test zone.
As a preferred solution: non-sensitive according to frost heave sensitivity permafrost region and frost heave in geology prospecting report partition testing region
The number of permafrost region measures the area A of a frost heave sensitivity permafrost region1, will be divided on the ground surface of the frost heave sensitivity permafrost region
Multiple first small lattice, the area of each first small lattice are S1, the center in each first small lattice is the position of a measuring point
It sets, the number N of setting measuring point in the frost heave sensitivity permafrost region1=A1/S1, similarly, determined in other frost heave sensitivity permafrost regions one by one
Measuring point number is respectively N2、N3…Nn；
Measure the area B of a non-sensitive permafrost region of frost heave1, more by being divided on the ground surface of the non-sensitive permafrost region of the frost heave
A second small lattice, the area of each second small lattice are S2, the number M of the interior setting measuring point of the non-sensitive permafrost region of the frost heave1=B1/S2,
Similarly, determine that measuring point number is respectively M in the non-sensitive permafrost region of other frost heaves one by one2、M3…Mm；To obtain in test zone
Total measuring point number.
As a preferred solution: the detection process of native frost heave detection device includes following four step:
Step 1: consulting geologic information, obtains the depth that this area's soil does not freeze layer, is required according to measuring accuracy, is selected
The corresponding tension sensor of precision；
Step 2: it excavates hole and is put into chassis after manually ramming flat hole hole bottom；
Step 3: spring element is connected with the upper end of connecting rod, then the lower end of connecting rod is connect with chassis, on chassis
On be put into casing, in the outside back-filling in layers original soil of casing, upper anchor disk is fixedly mounted on casing, upper anchor disk by layering tamping
On be provided with tension sensor；
Step 4: starting tension sensor, the value of thrust for recording tension sensor is F0, when casing becomes in frozen soil layer frost heave
Shape moves up under driving, and spring element is elongated, and the value of thrust for re-recording tension sensor is F1, frost-heaving deformation amount is (F1-
F0The coefficient of elasticity of)/spring element records data, closes tension sensor.
The present invention has the advantages that compared with the existing technology
1, the configuration of the present invention is simple, the scope of application is flexible, is not necessarily to earth's surface peripheral device structure Auxiliary support, assembling difficulty is low and walks
Rapid simple, landfill depth and landfill direction are flexibly unrestricted, and size area is applicable.Obtain Frost heave of frozen soil amount it is simple directly and
Accurately.It is low to monitor difficulty, the disturbance caused by the live soil body is small, can quickly obtain comprehensive and accurate monitoring in a short time
Data.
2, the present invention is not only able to the detection of the independent measuring point for regional area, additionally it is possible to be used for the biggish batch in region
The detection of measuring point, so that the frost heave and thaw collapse to laboratory and the live soil body make thoroughly evaluating.
3, the frozen soil of detection target of the invention between upper anchor disk and chassis, distance change between the two are able to reflect
The frost heave degree of the soil body between the two out, real-time, the indirect and accurate record by the variation of force value in tension sensor, detection
As a result reliable.
4, tension sensor of the invention is coupling type electronic balance, and measuring range range of choice is big, and precision is high, only needs electricity
Pond does not need external power supply, has liquid crystal display to show test data, when which is used for long term monitoring, opening when can take measurement
Power switch reads data, and usually electronic balance is in close state, and saving energy consumption overcomes previous various displacement sensors and needs
Inconvenience caused by external power supply is provided.
5, the present invention flexibly and easily monitors different depth according to the length of engineering and laboratory requirement design casing
Frost-heaving deformation can also be embedded to multiple measuring devices simultaneously by different depth in the soil body, obtain the frost heaving amount of different frost heave layers
Difference.
6, the configuration of the present invention is simple, low manufacture cost, operating procedure is simple, and difficulty is low, time saving and energy saving.
Detailed description of the invention
Fig. 1 is schematic view of the front view of the invention；
Fig. 2 is front view structure diagrammatic cross-section of the invention；
Fig. 3 is working state schematic representation of the invention；
In figure, the chassis 1-；2- casing；The upper anchor disk of 3-；4- tension sensor；5- spring element；6- connecting rod；7- inner cylinder；8-
Shield；11- hole；14- frost heave layer.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, below by shown in the accompanying drawings specific
Embodiment describes the present invention.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit model of the invention
It encloses.In addition, in the following description, descriptions of well-known structures and technologies are omitted, it is of the invention to avoid unnecessarily obscuring
Concept.
Here, it should also be noted that, in order to avoid having obscured the present invention because of unnecessary details, in the accompanying drawings only
Show the structure and/or processing step closely related with the solution of the present invention, and be omitted with relationship of the present invention less its
His details.
Specific embodiment 1: illustrating that present embodiment, present embodiment include chassis 1, set in conjunction with Fig. 1, Fig. 2 and Fig. 3
Pipe 2, upper anchor disk 3, tension sensor 4, spring element 5 and connecting rod 6, casing 2 is provided on the chassis 1, and the upper end of casing 2 is solid
Surely it is connected with anchor disk 3, spring element 5 is arranged in casing 2, and the force side of tension sensor 4 passes through upper anchor disk 3 and spring element 5
One end be connected, the other end of spring element 5 is connected by connecting rod 6 with chassis 1.
Further, connecting rod 6 is preferably a steel strand wires, and selected material is the metal material of high-strength and high-modulus amount.
The length of connecting rod 6 is the 1/3~1/2 of 2 length of casing.Auxiliary extended testing system depth of the present invention is played in the setting of connecting rod 6
Effect can assist spring element 5 to extend elasticity measurement depth, to facilitate the use length of extension casing 2, make the present invention
It is applicable fathom unrestricted, also help reduction manufacturing cost.
Further, casing 2 is metal circular tube, and selected material is light aluminum alloy material, according to the non-jelly in each department
The depth of layer soil, the length of casing 2, diameter are adjusted, and the length value range of casing 2 is 30cm~150cm, casing 2
Diameter value range is 7cm~9cm.
Further, the upper end of casing 2 is threadedly coupled with upper anchor disk 3, and upper anchor disk 3 is rosette, the value of diameter
Range is 16~20cm.Selected material is the aluminum alloy materials of high-strength light.
Further, chassis 1 is that one section of casing is formed by fixedly connecting with rosette, 16~20cm of diameter.
Further, the center point of upper anchor disk 3 is machined with centre bore, the force side of tension sensor 4 pass through centre bore with
The upper end of spring element 5 is connected, and the lower end of spring element 5 is connected with chassis 1.
Specific embodiment 2: present embodiment is further limiting for specific embodiment one, it is provided on chassis 1 interior
Cylinder 7, chassis 1 is coaxially disposed with inner cylinder 7 and the two is fixedly connected and is made as one, and the lower end of casing 2 is sleeved on inner cylinder 7, casing 2
The outer wall of inner wall and inner cylinder 7 be slidably matched.
Further, the connection type of chassis 1 and inner cylinder 7 is preferably that one section of casing is formed by fixedly connecting with rosette,
The value range of metal disc diameter is 16~20cm.
Specific embodiment 3: present embodiment is that specific embodiment one or two further limit, tension sensor 4
For coupling type electronic balance.It is existing product, and the course of work is identical as the course of work of existing electronic balance.The present invention makes
Tension sensor 4 is the tension sensor of internal battery.
Specific embodiment 4: present embodiment is further limiting for specific embodiment one, two or three, upper anchor disk 3
On be provided with shield 8.
Specific embodiment 5: present embodiment is further limiting for specific embodiment one, two, three or four, elastic force
Part 5 is spring.Spring is made of stainless steel material, line footpath, spring outer diameter, length can according to the maximum frost heaving amount of frozen soil and
Measuring accuracy, which calculates, to be determined, can also select corresponding spring according to the length of casing.Other flexible finished parts can also replace
It changes.
Specific embodiment 6: illustrating that present embodiment, present embodiment include the following contents in conjunction with Fig. 1, Fig. 2 and Fig. 3:
The distributing position of measuring point number and each measuring point in test zone is determined according to the frozen ground types of test zone,
One native frost heave detection device without external power supply of corresponding installation at each measuring point detects dress by the native frost heave of no external power supply
Set the frost heaving amount data of frost heave layer where obtaining each measuring point of different periods, the frost heaving amount data summarization fed back according to each measuring point
Obtain Frost heave of frozen soil deformation in test zone.
Test zone is divided according to geology prospecting report, division principle is non-sensitive according to frost heave sensitivity and frost heave
Property divided, frost heave sensitivity and the non-sensitive partitioning standards of frost heave derive from the data of geologic prospect report, divide former
It is then the prior art, counts the number of frost heave sensitivity permafrost region and the non-sensitive permafrost region of frost heave after test zone is divided respectively,
It is determined in each frost heave sensitivity permafrost region and determines measuring point number in measuring point number and the non-sensitive permafrost region of each frost heave, determined
Journey is as follows:
When the number of frost heave sensitivity permafrost region is n, the area A of a frost heave sensitivity permafrost region1, frost heave sensitivity jelly
The multiple first small lattice are divided on the ground surface of Tu Qu, the area of each first small lattice is S1, the interior setting of the frost heave sensitivity permafrost region
The number N of measuring point1=A1/S1, similarly, determine that measuring point number is respectively N in other frost heave sensitivity permafrost regions one by one2、N3…Nn；S1
Value range be 0.25~1m2, i.e., spacing G in frost heave sensitivity permafrost region between vertical or horizontal every two adjacent measuring point1For
50~100cm, for convenience of calculation, the shape of the first small lattice is square；
The spacing G in frost heave sensitivity permafrost region between vertical or horizontal every two adjacent measuring point is first determined in this step1, then
It is carried out drawing lattice according to spacing, it is final to determine measuring point number N1=A1/S1；
S in this step1Value range be 0.25~1m2, S1Value range be according to longitudinal in frost heave sensitivity permafrost region
Or the spacing G between lateral every two adjacent measuring point1It is calculated, for convenience of calculation, the shape of the first small lattice is square；
Two cornerwise intersection points are a point position in each first small lattice, the spacing G between every two adjacent measuring point1Refer to
The distance between the center of circle of two upper anchor disks 3, spacing G1Value range be according to the outer diameter of upper anchor disk 3 and it is two neighboring on
Non-interfering minimal distance requirement determines that the outer diameter of upper anchor disk 3 is according to itself and tension sensor 4, casing between anchor disk 3
Decision is required between 2 size, it is ensured that be clamped with enough soil bodys, i.e. G between upper anchor disk 3 and chassis 11For 50~100cm,
Spacing G between every two adjacent measuring point1Determination after, due to point position be the small center of a lattice position in place first
The area of first small lattice where obtaining measuring point operates carrying out practical lattice of drawing, can ensure that measuring point is final by way of drawing lattice
Determination position it is more accurate.
When the number of the non-sensitive permafrost region of frost heave is m, the area B of a non-sensitive permafrost region of frost heave1, the frost heave is non-
The multiple second small lattice are divided on the ground surface of sensitive permafrost region, the area of each second small lattice is S2, the frost heave sensitivity permafrost region
The number M of interior setting measuring point1=B1/S2, similarly, determine that measuring point number is respectively M in other non-frost heave sensitivity permafrost regions one by one2、
M3…Mm；S2Value range be 4~16m2, i.e., between the vertical or horizontal every two adjacent measuring point of the non-sensitive permafrost region of frost heave
Spacing G2For 200~400cm, for convenience of calculation, the shape of small lattice is square；
The spacing G in frost heave sensitivity permafrost region between vertical or horizontal every two adjacent measuring point is first determined in this step2, then
It is carried out drawing lattice according to spacing, it is final to determine measuring point number M1=B1/S2；
S in this step2Value range be 4~16m2, S2Value range be according to longitudinal in the non-sensitive permafrost region of frost heave
Or the spacing G between lateral every two adjacent measuring point2It is calculated, for convenience of calculation, the shape of the second small lattice is square；
Two cornerwise intersection points are a point position in each second small lattice, the spacing G between every two adjacent measuring point2Refer to
The distance between the center of circle of two upper anchor disks 3, spacing G2Value range be according to the outer diameter of upper anchor disk 3 and it is two neighboring on
Non-interfering minimal distance requirement determines that the outer diameter of upper anchor disk 3 is according to itself and tension sensor 4, casing between anchor disk 3
Decision is required between 2 size, it is ensured that be clamped with enough soil bodys, i.e. G between upper anchor disk 3 and chassis 12For 200~
400cm, the spacing G between every two adjacent measuring point2Determination after, due to point position be the small center of a lattice position in place second
Set, the area of the second small lattice where you can get it measuring point, carry out it is practical draw lattice operation, can ensure to survey by way of drawing lattice
The final determination position of point is more accurate.
N1、N2、N3…NnAnd M1、M2、M3…MmSummation be total measuring point number in test zone, prepare corresponding number
Native frost heave detection device, the center in each first small lattice or each second small lattice is the native frost heave without external power supply
Detection device position；
Frost heave sensitivity permafrost region is measuring point concentrated area in test zone, is distributed position according to measuring point in frost heave sensitivity permafrost region
It sets situation and native frost heave detection device is installed, it is ensured that a native frost heave detection device is installed at each measuring point, is examined by native frost heave
The frost heaving amount data that device obtains frost heave layer 14 where each measuring point in the different periods region are surveyed, are frozen according to each frost heave sensitivity
Tu Qu and the frost heaving amount data summarization of the non-sensitive permafrost region feedback of frost heave obtain the case where Frost heave of frozen soil deforms in test zone.Together
It manages in the installation process of the non-sensitive permafrost region of frost heave.
Present invention combination geological mapping situation combination model machine carries out test of many times, in frost heave sensitivity permafrost region plane laterally
And 50~100cm of longitudinal pitch arrangement measuring point is best setting range, is arranged according to 1~4 measuring point in every square metre of unit area,
And 200~400cm of transverse direction and longitudinal direction spacing arranges measuring point in the non-sensitive area's plane of frost heave, it can be according to every 16 square metres of unit areas
Interior 1~4 measuring point setting, in addition, complex geologic conditions, having particular/special requirement engineering ground that measure-point amount is arranged according to unequal spacing.
The frost heave of soil is often according to 0~1%, 1~3.5%, 3.5~6%, 6~10% and 10% or more section of frozen-heave factor
It is divided into not frost heave, weak frost heave, frost heave, strong frost heave and extra-heavy frost heave.Frost heave, strong frost heave and extra-heavy frost heave belong to frost heave sensitivity jelly
Soil belongs to the non-sensitive frozen soil of frost heave without frost heave, weak frost heave.
Specific embodiment 7: present embodiment is further limiting for specific embodiment six, the frost heave of frozen soil is divided into
Frost heave in situ and fractional condensation frost heave, frost heave in situ are made of flexible deformation and water-ice phase transformation incremental deformation of soil skeleton, and fractional condensation is frozen
Swollen variation depending on temperature field and water the amount of migration is not frozen, frost heave responsive type permafrost region, frost heave insensitive permafrost region and prison
It surveys region and all determines the selection and point layout number of transducer range, important infrastructure engineering, roadbed, the soil below road surface
Body water content is abundant, local difference is required to increase monitoring point number greatly, such as the seasonal frozen soil region of river alongshore, due to the soil body
Moisture content it is generally higher, every transverse direction in plane, 50~100cm of longitudinal gap arrange a measuring point, according to every square metre of unit
1~4 measuring point is arranged in area, far from river, a measuring point is arranged at interval of 200~400cm, according to every 16 square metres of unit planes
1~4 measuring point setting in product, complex geologic conditions have particular/special requirement engineering ground that measure-point amount is arranged according to unequal spacing.
Specific embodiment 8: present embodiment is that specific embodiment six or seven further limit, specific embodiment party
The detection process of formula eight includes following four step:
Step 1: consulting geologic information, obtains the depth that this area's soil does not freeze layer, is required according to measuring accuracy, is selected
The corresponding tension sensor 4 of precision；
Step 2: it excavates hole 11 and is put into chassis 1 after manually ramming 11 bottom of flat hole hole；
Step 3: spring element 5 being connected with the upper end of connecting rod 6, then the lower end of connecting rod 6 is connect with chassis 1,
Casing 2 is put on chassis 1, in the outside back-filling in layers original soil of casing 2, upper anchor disk 3 is fixedly mounted on casing 2 by layering tamping
On, tension sensor 4 is set on upper anchor disk 3；
Step 4: starting tension sensor 4, the value of thrust of record tension sensor 4 are F0, when casing 2 freezes in frozen soil layer
Bulging deformation moves up under driving, and spring element 5 is elongated, and the value of thrust for re-recording tension sensor 4 is F1, frost-heaving deformation amount is
For (F1-F0The coefficient of elasticity of)/spring element 5 records data, closes tension sensor 4；
Measuring point each in test zone is finally passed through into the frost heave layer 14 of the native frost heave detection device records of no external power supply
Frost heaving amount summarize, by each measuring point plan-position and its frost-heaving deformation amount drawing three-dimensional image and the trend that changes with time,
When a regional area frost-heaving deformation in test zone is excessive, illustrate that the regional area soil moisture content is higher, it is subsequent can
Corresponding technical measures are taken to reduce the influence of frost heave, it can be comprehensive by the analysis of frost heaving amount maximum value, minimum value and average value
Evaluate the frost heave situation of frost heave layer 14 in measurement region.
Further, the diameter that opens up of above-mentioned steps Hole 11 is 15~25cm, and the best value of diameter is 20cm, should
Diameter has versatility.
Specific embodiment 9: present embodiment is further limiting for specific embodiment six, seven or eight, it is of the invention
Monitoring cycle is long and monitoring data are accurately comprehensive, and monitoring cycle is entire winter, and the specific time is that the temperature on average of First Year connects
Nearly 0 DEG C of autumn end originates to the temperature on average of second year go up to 0 DEG C or more of spring at the beginning of.
Illustrate following embodiment in conjunction with beneficial effects of the present invention:
Embodiment one:
Test zone is the city the northeast H area X road shoulder, obtains geologic prospect report and knows that test zone soil does not freeze the depth of layer
Degree is 2100mm, is 10m × 20m according to the size of test zone, and the number of frost heave sensitivity permafrost region is 8 in partition testing region
A, the number of the non-sensitive permafrost region of frost heave is 12, determines that a frost heave sensitivity is frozen according to the significance level at geologic prospect position
The area A of Tu Qu1And the first small lattice area S in the frost heave sensitivity permafrost region1, A known to measurement1=8m2Each first small lattice
Area S1=1m2Native frost heave detection device is installed in each first small lattice, carries out the detection of next step, specific operation process is such as
Under:
Step 1: consulting geologic information, obtains the depth that this area's soil does not freeze layer, is required according to measuring accuracy, is selected
The corresponding tension sensor 4 of precision；
Step 2: it excavates hole 11 and is put into chassis 1 after manually ramming 11 bottom of flat hole hole；
Step 3: spring element 5 being connected with the upper end of connecting rod 6, then the lower end of connecting rod 6 is connect with chassis 1,
Casing 2 is put on chassis 1, in the outside back-filling in layers original soil of casing 2, upper anchor disk 3 is fixedly mounted on casing 2 by layering tamping
On, tension sensor 4 is set on upper anchor disk 3；
Step 4: when record time point is the November in 2018 of the morning 8 on the 20th, start tension sensor 4, record pull sensing
The value of thrust F of device 40=20g, the spacing between chassis 1 and upper anchor disk 3 are 500mm, and the coefficient of elasticity of spring element 5 is 300g/
Mm, when casing 2 moves up under the drive of frozen soil layer frost-heaving deformation when the December in 2018 of the morning 8 on the 20th, spring element 5 is elongated,
Show value on 4 display screen of tension sensor is F1=920g, frost-heaving deformation amount are (F1-F0The coefficient of elasticity of)/spring element=
900/300=3.0mm recording data, tension sensor 4 is closed.
As the frost heave of the soil body moves up, the distance between chassis 1 and upper anchor disk 3 constantly increase, and make tension sensor 4 and bottom
The distance between disk 1 is gradually increased, and at the January in 2019 of the morning 8 on the 30th, starts tension sensor 4, pulling force at same observation station
Show value on 4 display screen of sensor is F1=1120g, frost-heaving deformation amount are (F1-F0The coefficient of elasticity 1100/ of)/spring element
300=3.6mm records data, closes tension sensor 4.The frost-heaving deformation amount obtained twice is compared, it is poor therebetween
Away from smaller, show environment temperature on the deformation of the measuring point corresponding body frost heaving influenced during 12 the end of month to next year end of January compared with
It is small, and so on, other measuring points are tested, drawing three-dimensional figure is summarized into each measuring point plan-position and its frost-heaving deformation amount
Picture, and mark the trend that changes with time and instruction is provided with the degree of quantitative assessment test zone frost-heaving deformation.Work as survey
When a regional area frost-heaving deformation in examination region is excessive, illustrate that the regional area soil moisture content is higher, it is subsequent to take
Corresponding technical measures reduce the influence of frost heave, pass through frost heaving amount maximum value, minimum value, average value and the rule that changes with time
Analysis can thoroughly evaluating go out measure region in frost heave layer 14 frost heave situation.
Claims (8)
1. a kind of native frost heave detection device of no external power supply, it is characterised in that: it includes chassis, casing, upper anchor disk, pulling force biography
Sensor, spring element and connecting rod are provided with casing on the chassis, and the upper end of casing is fixedly connected with anchor disk, and spring element is set
It sets in casing, the force side of tension sensor passes through upper anchor disk and is connected with one end of spring element, and the other end of spring element is logical
Connecting rod is crossed to be connected with chassis.
2. a kind of native frost heave detection device of no external power supply according to claim 1, it is characterised in that: be arranged on chassis
There is inner cylinder, chassis is coaxially disposed with inner cylinder and the two is fixedly connected and is made as one, and the lower end of casing is set on the inner cylinder, casing
The outer wall of inner wall and inner cylinder is slidably matched.
3. a kind of native frost heave detection device of no external power supply according to claim 1, it is characterised in that: tension sensor
For coupling type electronic balance.
4. a kind of native frost heave detection device of no external power supply according to claim 1, it is characterised in that: set on upper anchor disk
It is equipped with shield.
5. a kind of native frost heave detection device of no external power supply according to claim 1, it is characterised in that: spring element is bullet
Spring.
What 6. a kind of native frost heave detection device using a kind of no external power supply described in any one of any one of claims 1 to 55 was realized
Detection method, it is characterised in that: determine measuring point number and each measuring point in test zone according to the frozen ground types of test zone
Distributing position, one native frost heave detection device without external power supply of corresponding installation, passes through no external power supply at each measuring point
Native frost heave detection device obtain each measuring point of different periods where frost heave layer frost heaving amount data, according to each measuring point feedback
Frost heaving amount data summarization obtains Frost heave of frozen soil deformation in test zone.
7. detection method according to claim 6, it is characterised in that: freeze according in geology prospecting report partition testing region
The number of swollen sensitivity permafrost region and the non-sensitive permafrost region of frost heave, measures the area A of a frost heave sensitivity permafrost region1, by the frost heave
The multiple first small lattice are divided on the ground surface of sensitive permafrost region, the area of each first small lattice is S1, in each first small lattice
Center is the position of a measuring point, the number N of setting measuring point in the frost heave sensitivity permafrost region1=A1/S1, similarly, one by one
Determine that measuring point number is respectively N in other frost heave sensitivity permafrost regions2、N3…Nn；
Measure the area B of a non-sensitive permafrost region of frost heave1, multiple will be divided on the ground surface of the non-sensitive permafrost region of the frost heave
Two small lattice, the area of each second small lattice are S2, the number M of the interior setting measuring point of the non-sensitive permafrost region of the frost heave1=B1/S2, together
Reason, determines that measuring point number is respectively M in the non-sensitive permafrost region of other frost heaves one by one2、M3…Mm；It is total in test zone to obtain
Measuring point number.
8. detection method according to claim 6 or 7, it is characterised in that: the detection process of native frost heave detection device includes
Following four step:
Step 1: consulting geologic information, obtains the depth that this area's soil does not freeze layer, is required according to measuring accuracy, choice accuracy
Corresponding tension sensor；
Step 2: it excavates hole and is put into chassis after manually ramming flat hole hole bottom；
Step 3: spring element is connected with the upper end of connecting rod, then the lower end of connecting rod is connect with chassis, is put on chassis
Enter casing, in the outside back-filling in layers original soil of casing, upper anchor disk is fixedly mounted on casing, sets on upper anchor disk by layering tamping
It is equipped with tension sensor；
Step 4: starting tension sensor, the value of thrust for recording tension sensor is F0, when casing is in frozen soil layer frost-heaving deformation band
It is moved up under dynamic, spring element is elongated, and the value of thrust for re-recording tension sensor is F1, frost-heaving deformation amount is (F1-F0)/
The coefficient of elasticity of spring element records data, closes tension sensor.
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| CN201910240854.XA CN109884112B (en) | 2019-03-28 | 2019-03-28 | Detection method realized by soil frost heaving detection device without external power supply |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3920471B2 (en) * | 1998-09-11 | 2007-05-30 | 弘和産業株式会社 | Frost heave mitigation structure |
| CN104316671A (en) * | 2014-10-10 | 2015-01-28 | 同济大学 | Test device for measuring frost heaving force and frost heaving capacity of artificial frozen-thawed soil |
| CN205484332U (en) * | 2016-03-26 | 2016-08-17 | 西北大学 | Measuring device of frozen swelling thaw collapse of loess appearance volume |
| RU165654U1 (en) * | 2016-01-11 | 2016-10-27 | Общество с ограниченной ответственностью "СибТрансСтрой" | INSTALLATION FOR MEASURING NORMAL FORCES OF FROZEN GROWING SOIL |
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2019
- 2019-03-28 CN CN201910240854.XA patent/CN109884112B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3920471B2 (en) * | 1998-09-11 | 2007-05-30 | 弘和産業株式会社 | Frost heave mitigation structure |
| CN104316671A (en) * | 2014-10-10 | 2015-01-28 | 同济大学 | Test device for measuring frost heaving force and frost heaving capacity of artificial frozen-thawed soil |
| RU165654U1 (en) * | 2016-01-11 | 2016-10-27 | Общество с ограниченной ответственностью "СибТрансСтрой" | INSTALLATION FOR MEASURING NORMAL FORCES OF FROZEN GROWING SOIL |
| CN205484332U (en) * | 2016-03-26 | 2016-08-17 | 西北大学 | Measuring device of frozen swelling thaw collapse of loess appearance volume |
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| 张晶: "季节性冻土区路基差异性沉降控制", 《内蒙古公路与运输》 * |
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