The device of drill hole inner wall soil temperature Fast Measurement
Technical field
The present invention relates to the device measuring soil temperature, particularly a kind of device for the indirect Fast Measurement of cold regions engineering backfill soil different parts core temperature.
Background technology
In recent years, along with the quickening of development of the West Regions paces, the national Important Project such as Qinghai-Tibet Railway, Qinghai-Tibet alternating current-direct current networking project, Qinghai-Tibet highway Qinghai-Tibet permafrost region constantly implement and etc. to be deployed.In Process of Engineering Construction, basis all will form a large amount of backfill soil around.According to engineering construction requirement, all need after engineering construction completes to detect the refreezing process of backfill soil, to reconnoitre the engineering characteristic situation of change such as unit weight, packing, ice content, temperature, stress intensity of backfill soil, evaluate the impact on engineering foundation stability in backfill soil refreezing process with this.In Permafrost Area, soil temperature is the determinative causing backfill soil mechanical property generation radical change, is also to pass judgment on mechanical characteristic in backfill soil refreezing process whether the important indicator of acute variation occurs; Simultaneously, the soil temperature of backfill soil also determine migration and the conversion process of soil body moisture in engineering foundation, the huge contrast in its temperature field and periphery natural rock-filled temperature field easily causes excessive migration and the gathering of moisture, very easily produce the unfavorable geology such as thaw slumping or frost heave disaster, the stability of grievous injury engineering foundation.
In detecting engineering in permafrost regions foundation filling soil refreezing process, the unit weight, packing, ice content, core temperature, mechanical characteristic etc. that could must be banketed to different parts by boring coring are measured.But, in boring and coring process, owing to being subject to the grinding of drilling tool, the impact of ground environment, directly core temperature being measured and often there is larger error and uncertainty; And adopt the mode of pre-buried temperature sensor to measure backfill soil core temperature at prospecting point often to need special instrument and equipment.This instrument and equipment is with high costs, and pre-buried temperature sensor is easily subject to the impact of engineering construction and is usually damaged, and makes it be difficult to popularize on a large scale and use.Therefore, get after core completes in engineering foundation backfill soil, the soil temperature of drill hole inner wall is measured, it is the best mode of indirect determination core temperature, while avoiding external environment on measurement result impact, also can significantly reduce backfill soil engineering detecting cost, and have fast, advantage easily.
Although measure the instrument and equipment varied (as cable for measuring temperature, hand-held temperature measuring instrument, soil moisture measuring instrument etc.) of temperature at present, but do not have aly to design for core drill hole inner wall soil temperature Fast Measurement especially, and often these instrument and equipment costs are high, to be difficult to meet in engineer applied fast, requirement easily.Therefore, research and develop a kind of drill hole inner wall soil temperature rapid determination device, for raising cold regions engineering backfill soil refreezing process detection efficiency, there is vital role.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide a kind of device of drill hole inner wall soil temperature Fast Measurement, indirectly measure the temperature of core for the drill hole inner wall soil body exactly, improve the efficiency that cold regions engineering backfill soil refreezing process detects.
Technical scheme of the present invention is:
A device for drill hole inner wall soil temperature Fast Measurement, is made up of temperature sensor, " people " font open and close device, bracing wire, spring, extension rod, parking brake, fixing-line device and expansion link.Be equipped with expansion link and spring between " people " font open and close device, expansion link is positioned at the top of spring, the outside of temperature sensor is fixed on " people " word open and close device, and " people " font open and close device top knot is in axle, and the top of axle is equipped with extension rod, and is connected with axle; Above extension rod, parking brake is housed, parking brake arranges fixing-line device, the bracing wire on fixing-line device, be drawstring through extension rod and axle, be connected with the expansion link be equipped with between " people " font open and close device.
The estimating precision of said temperature sensor is ± 0.01 DEG C, range ability-50 DEG C-50 DEG C, and the response time is 0.1 second.
Above-mentioned extension rod inside is hollow structure, and material can be stainless steel or for timber or for plastics.
The effect of advantage of the present invention and generation is:
1, the present invention is used for Fast Measurement drill hole inner wall soil temperature, has the features such as simple operation, measurement result are accurate, time saving and energy saving, has vital role for raising cold regions engineering backfill soil refreezing process detection efficiency.
2, structure of the present invention is simple, economical and practical, the temperature of core can be measured exactly, accurately pass judgment on backfill soil engineering mechanics feature, internal moisture Transport And Transformation process of banketing for predictive engine basis, to improve the efficiency that cold regions engineering backfill soil refreezing process detects significant.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further again:
As shown in Figure 1, a kind of device of drill hole inner wall soil temperature Fast Measurement, is made up of temperature sensor 1, " people " font open and close device 2, bracing wire 3, spring 4, extension rod 5, parking brake 6 and fixing-line device 7.Be equipped with expansion link 9 and spring 4 between " people " font open and close device 2, the outside that temperature sensor 1 is fixed on " people " word open and close device 2 is adopted instrument with number and is connected." people " font open and close device 2 top is occured simultaneously in axle 8, and the top of axle 8 is equipped with extension rod 5, and is connected with axle 8; Extension rod 5 inside is hollow structure, and material can be stainless steel or for timber or for plastics, parking brake 6 is housed above it, parking brake 6 arranged fixing-line device 7, fixing-line device 7 for bracing wire 3 being clamped and being fixed on parking brake 6, bracing wire 3 slippage when preventing parking brake 6 from drawing.Bracing wire 3 on fixing-line device 7 can be finer wire or nylon wire, and bracing wire 3 is passed from extension rod 5 and axle 8 inside, for being equipped with expansion link 9 between traction " people " font open and close device 2.
When utilizing this device to measure cold district frozen soil engineering backfill soil drill hole inner wall soil temperature, first fixing-line device 7 is unclamped, " people " font open and close device 2 with temperature sensor 1 is placed in the detected part of bore inner by extension rod 5, then tightens fixing-line device 7 and bracing wire 3 is fixed.Slowly close parking brake 6 with hand, draw the expansion link 9 between " people " font open and close device 2 by bracing wire 3, expansion link 9 opening degree is increased; Drill hole inner wall is close to by temperature sensor 1 outside " people " font open and close device 2, by temperature sensor 1, temperature transmitted number and adopts instrument, adopted the soil temperature of instrument record measurement site drill hole inner wall by number.
After having measured the soil temperature of a part drill hole inner wall, come up parking brake, loosens the bracing wire 3 on fixing-line device 7, and expansion link 9 between " people " font open and close device 2 is drawn in bracing wire 3 and spring 4 opening degree reduces, temperature sensor 1 is separated with bore inner soil body surface, and device can be mobile in boring.
When measuring the soil temperature of other degree of depth of drill hole inner wall, extension rod 5 and bracing wire 3 length being adjusted accordingly, by aforesaid operations process, completes the mensuration of different parts drill hole inner wall soil temperature.
After whole drill hole inner wall soil temperature completes measurement, unclamp fixing-line device 7, retraction extension rod 5 and bracing wire 3, and carry out corresponding clean, then device is properly preserved.