CN109945925A - A kind of Temperature Humidity Sensor protective device and usage being buried in soil-aggregate subgrade - Google Patents
A kind of Temperature Humidity Sensor protective device and usage being buried in soil-aggregate subgrade Download PDFInfo
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- CN109945925A CN109945925A CN201910242969.2A CN201910242969A CN109945925A CN 109945925 A CN109945925 A CN 109945925A CN 201910242969 A CN201910242969 A CN 201910242969A CN 109945925 A CN109945925 A CN 109945925A
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- humidity sensor
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- temperature humidity
- protection shell
- conducting wire
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Abstract
The invention discloses a kind of Temperature Humidity Sensor protective devices and usage being buried in soil-aggregate subgrade, including the protection shell for holding Temperature Humidity Sensor and the insulated metal conducting wire being fixed on protection shell；Several air holes are uniformly provided on the protection shell, one end of the protection shell is equipped with top cover by screw thread；The U-shaped arrangement of insulated metal conducting wire, the bottom of insulated metal conducting wire bypass and are fixed on protection shell, and both ends horizontal is led on the outside of roadbed.The present invention makes Temperature Humidity Sensor bury process control, contacts the probe of Temperature Humidity Sensor with fine grained soil, improves the exposure level of Temperature Humidity Sensor probe and gravelly soil, it is ensured that temperature and humidity measurement precision.The present invention solves the problems, such as that inbuilt sensor may be disturbed and lead to sensor shift and later period location difficulty in coarse-grained soil by test plain conductor resistance.The present invention solves the problems, such as that sensor is easily squeezed by rubble in fill subgrade containing rubble and destroys.
Description
Technical field
The present invention relates to engineering monitoring technical fields, and in particular to a kind of temperature and humidity sensing being buried in soil-aggregate subgrade
Device protective device and usage.
Background technique
Investigation shows in China, depth seasonal frozen ground (> 1m) distribution area accounts for about the 1/3 of national territorial area.Permafrost region roadbed
Freeze injury is to perplex the outstanding problem of northern China and western road construction and safe operation for a long time, and wherein moisture moves in roadbed
It moves and temperature change is to cause the major reason of roadbed frost damage.Therefore, in the highway engineering of the northern area of China, using temperature/
Humidity sensor is very necessary come the variation for monitoring moisture and temperature in roadbed.In addition, in many areas of northern China, road
Base embankment mostly uses scene to banket containing rubble, and existing temperature/humidity sensor is typically all to design the temperature for being only applicable to fine grained soil
Degree, moisture measurement, such as clay, silt, and to coarse-grained soil fill subgrade, still there are many insufficient for the prior art.Temperature/humidity passes
The measurement accuracy of sensor is affected by many factors, for example, sensor own form, placed angle, embedded medium grain composition,
Compactness etc..On the whole, the main because including sensor self-characteristic and embedded condition two of sensor accuracy class is influenced
Aspect.
For the embedded of such as soil pressure cell of conventional sensors under the conditions of embankment, general step is as follows:
1) pit slot is excavated at predetermined measuring point to predetermined position.
2) planarizing sensor buries bedding face, keeps its closely knit, uniform, smooth.
3) sensor is placed as requested.
4) sensor protection；Protective layer is generally prepared above its sense film using graded sand, sensor buries in coarse-grained soil
If when can suitably relax protective layer particle size requirements.Protective layer answers layered rolling to prepare, and guarantees closely knit
5) soil medium in situ is backfilled.Thin layer stone, compaction in layers, make the gradation, water content, density of sensor adjacent material with
Surrounding soil is consistent.
It, will from above-mentioned steps as can be seen that such as Temperature Humidity Sensor is laid in coarse-grained soil according to traditional method for embedding
There are own shortcomings:
1) sensor measurement validity cannot be guaranteed.When embedded temperature/humidity sensor measures in coarse-grained soil building stones,
It since soil body particle is larger, causes sensor probe that can not come into full contact with the soil body, leads to test result mistake.
2) sensor is buried in fill subgrade containing rubble, because the partial sizes such as roadbed medium stone, block stone, slabstone are big, with sharp
Corner angle at the scene under the conditions of construction rolling, easily cause sensor to be extruded destruction.
3) roadbed filling work progress due to work progress embankment and cuts the factors such as slope, and slope foot outer rim is always in dynamic
Adjustment, and sensor is often embedded in the construction stage, the sensor accurate location later period is difficult to be accurately positioned when construction is completed.
Summary of the invention
To solve the above problems, the present invention is intended to provide a kind of both can guarantee that Temperature Humidity Sensor probe was filled with the live soil body
Tap touching, and can prevent Temperature Humidity Sensor from being squeezed the Temperature Humidity Sensor protective device and usage destroyed by rubble, and also
It can accurately determine sensor position.
Technical solution: a kind of Temperature Humidity Sensor protective device being buried in soil-aggregate subgrade, including for holding temperature
The protection shell of humidity sensor and the insulated metal conducting wire being fixed on protection shell；It is uniformly provided on the protection shell
One end of several air holes, the protection shell is equipped with top cover by screw thread；The U-shaped arrangement of insulated metal conducting wire, absolutely
The bottom of edge plain conductor bypasses and is fixed on protection shell, and both ends horizontal is led on the outside of roadbed.
The invention also includes the protection sleeve pipes that level is laid on subsurface；The insulated metal conducting wire is laid on protection sleeve pipe
It is interior.
Further, the cable bundle of the insulated metal conducting wire and Temperature Humidity Sensor, is collectively disposed in protection sleeve pipe.
The application method of the above-mentioned Temperature Humidity Sensor protective device being buried in soil-aggregate subgrade, comprising the following steps:
Step 1: sieving live soil sample, and in the fine grained soil filling protection shell that scene is sieving through, depth of cracking closure is big
In the length of the probe of Temperature Humidity Sensor, and it is densified to consistent with live roadbed soil compaction；Then by Temperature Humidity Sensor
Probe downward, in the soil body in steady insertion protection shell, be put into after Temperature Humidity Sensor and continue to insert live soil sample to filling out
It is full, and keep compactness consistent with live subgrade soils；Then top cover is screwed；
Step 2: excavating embedded groove, and Temperature Humidity Sensor protective device configured in step 1 is placed in burying of having dug
If being placed in point to be measured in hole；
Step 3: the bottom of insulated metal conducting wire is bypassed and is fixed on protection shell, and then both ends horizontal leads to roadbed
Outside；
Step 4: continuing to backfill the live soil body in situ, layered rolling, and it is identical as the soil body in situ to control its compactness, until backfilling
Material fills up entire embedded hole；
Step 5: measuring the all-in resistance of insulated metal conducting wire by ammeter, according to its resistance per unit length value and actual measurement all-in resistance
It can be obtained horizontal distance of the Temperature Humidity Sensor burial place apart from measuring point.
The utility model has the advantages that (1) present invention makes Temperature Humidity Sensor bury process control, make the probe of Temperature Humidity Sensor and thin
Grain soil contact, improves the exposure level of Temperature Humidity Sensor probe and gravelly soil, it is ensured that temperature and humidity measurement precision.(2) originally
By test plain conductor resistance, efficiently solving the inbuilt sensor in coarse-grained soil may be disturbed and cause to pass for invention
The problem of sensor displacement and later period location difficulty.(3) it is easily broken in fill subgrade containing rubble to efficiently solve sensor by the present invention
Stone squeezes the problem of destroying.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Such as Fig. 1, a kind of Temperature Humidity Sensor protective device being buried in soil-aggregate subgrade, including for holding temperature and humidity
The protection shell 2 of sensor 1 and the insulated metal conducting wire 4 being fixed on protection shell 2.
Several air holes are uniformly provided on the protection shell 2, in order to improve permeable breathable while stop rubble
It squeezes, the close aperture simultaneously of air hole arrangement is less than the average grain diameter of rubble.The preferred PVC of material of shell 2 is protected, PVC's is lazy
Property ensure that the durability under its site application conditions.
One end of the protection shell 2 is equipped with top cover 3 by screw thread, facilitates the dismounting of Temperature Humidity Sensor 1.Temperature and humidity
The cable 5 of sensor 1 is drawn by the circular hole on top cover 3.
The U-shaped arrangement of the insulated metal conducting wire 4, the bottom of insulated metal conducting wire 4 bypass and are fixed on protection shell 2
On, the both ends horizontal of insulated metal conducting wire 4 is led on the outside of roadbed.
The insulated metal conducting wire 4 is tied up with cable 5, is collectively disposed at a level and is laid in the protection sleeve pipe of subsurface.
Protection sleeve pipe can protect insulated metal conducting wire 4 and cable 5 not impaired by the extruding of gravelly soil.And when work progress China and foreign countries
When boundary's factor causes the burial place for protecting shell 2 to change, insulated metal conducting wire 4 and cable 5 can be along protection sleeve pipes
It is freely up and down.
The application method of the above-mentioned Temperature Humidity Sensor protective device being buried in soil-aggregate subgrade, comprising the following steps:
Step 1: sieving live soil sample, and in the fine grained soil filling protection shell 2 that scene is sieving through, depth of cracking closure
Greater than the length of the probe 6 of Temperature Humidity Sensor 1, and it is densified to consistent with live roadbed soil compaction；Then temperature and humidity is passed
The probe 6 of sensor 1 downward, in the soil body in steady insertion protection shell 2, continues filling scene after being put into Temperature Humidity Sensor 1
Soil sample keeps compactness consistent with live subgrade soils to filling up；Then top cover 3 is screwed；Probe 6 can be filled with live fine grained soil
Tap touching, ensure that the accuracy of test result, and can avoid the loss of fine grained soil around sensor, cause probe and the soil body
It is detached from；
Step 2: excavating embedded groove, and Temperature Humidity Sensor protective device configured in step 1 is placed in burying of having dug
If being placed in point to be measured in hole；
Step 3: the bottom of insulated metal conducting wire 4 is bypassed and is fixed on protection shell 2, will be exhausted every 1-2 m strapping
Edge plain conductor 4 binds together with cable 5, then covers in horizontal positioned protection sleeve pipe, the both ends water of insulated metal conducting wire 4
It is flat to lead on the outside of roadbed；
Step 4: continuing to backfill the live soil body in situ, layered rolling, and it is identical as the soil body in situ to control its compactness, until backfilling
Material fills up entire embedded hole；
Step 5: measuring the all-in resistance of insulated metal conducting wire 4 by ammeter, according to its resistance per unit length value and actual measurement all-in resistance
It can be obtained horizontal distance of 1 burial place of Temperature Humidity Sensor apart from measuring point.
Claims (4)
1. a kind of Temperature Humidity Sensor protective device being buried in soil-aggregate subgrade, it is characterised in that: including for holding temperature
The protection shell (2) of humidity sensor (1) and the insulated metal conducting wire (4) being fixed in protection shell (2)；The protection shell
(2) several air holes are uniformly provided on, one end of protection shell (2) is equipped with top cover (3) by screw thread；The insulation
Plain conductor (4) U-shaped arrangement, the bottom of insulated metal conducting wire (4) bypass and are fixed in protection shell (2), insulated metal
The both ends horizontal of conducting wire (4) is led on the outside of roadbed.
2. the Temperature Humidity Sensor protective device according to claim 1 being buried in soil-aggregate subgrade, it is characterised in that:
It further include the horizontal protection sleeve pipe for being laid on subsurface；The insulated metal conducting wire (3) is laid in protection sleeve pipe.
3. the Temperature Humidity Sensor protective device according to claim 2 being buried in soil-aggregate subgrade, it is characterised in that:
The insulated metal conducting wire (4) and the cable (5) of Temperature Humidity Sensor (1) are tied up, and are collectively disposed in protection sleeve pipe.
4. a kind of use of the Temperature Humidity Sensor protective device according to claim 1 to 3 being buried in soil-aggregate subgrade
Method, which comprises the following steps:
Step 1: sieving live soil sample, and in fine grained soil filling protection shell (2) that scene is sieving through, filling is deep
Degree is greater than the length of the probe (6) of Temperature Humidity Sensor (1), and is densified to consistent with live roadbed soil compaction；It then will be warm
The probe (6) of humidity sensor (1) downward, in the soil body in steady insertion protection shell (2), is put into Temperature Humidity Sensor (1)
After continue to insert live soil sample to filling up, and keep compactness consistent with live subgrade soils；Then top cover (3) are screwed；
Step 2: excavating embedded groove, and Temperature Humidity Sensor protective device configured in step 1 is placed in burying of having dug
If being placed in point to be measured in hole；
Step 3: the bottom of insulated metal conducting wire (4) is bypassed and is fixed in protection shell (2), and then both ends horizontal is drawn
On the outside of to roadbed；
Step 4: continuing to backfill the live soil body in situ, layered rolling, and it is identical as the soil body in situ to control its compactness, until backfilling
Material fills up entire embedded hole；
Step 5: by the all-in resistance of ammeter measurement insulated metal conducting wire (4), according to its resistance per unit length value and the total electricity of actual measurement
Resistance can be obtained horizontal distance of Temperature Humidity Sensor (1) burial place apart from measuring point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242969.2A CN109945925B (en) | 2019-03-28 | 2019-03-28 | Temperature and humidity sensor protection device buried in gravel soil subgrade and application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242969.2A CN109945925B (en) | 2019-03-28 | 2019-03-28 | Temperature and humidity sensor protection device buried in gravel soil subgrade and application method |
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| CN109945925A true CN109945925A (en) | 2019-06-28 |
| CN109945925B CN109945925B (en) | 2021-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114910123A (en) * | 2022-04-26 | 2022-08-16 | 浙江科技学院 | Method and device for testing temperature and humidity inside artificial hardened ground |
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| CN109945925B (en) | 2021-09-07 |
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