CN103743496A - Method for testing temperature gradient in cement concrete pavement slab - Google Patents
Method for testing temperature gradient in cement concrete pavement slab Download PDFInfo
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- CN103743496A CN103743496A CN201310753239.1A CN201310753239A CN103743496A CN 103743496 A CN103743496 A CN 103743496A CN 201310753239 A CN201310753239 A CN 201310753239A CN 103743496 A CN103743496 A CN 103743496A
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Abstract
The invention discloses a method for testing the temperature of a cement concrete pavement slab. The number of needed test points along the depth direction of a pavement is determined according to a principle that the test points are gradually sparser from top to bottom; the test points are selected from the slab middle position and the slab edge position along the driving direction at intervals of 10cm respectively; the vertical distance between the test points at the slab edge position and the edge of the pavement slab is 5cm; the slab middle position and the slab edge position share a surface temperature test point; temperature sensors are buried in drilled holes commonly after the pavement is poured for 1h; in order to prevent driving on the pavement from being influenced, wires of other temperature sensors except a surface temperature test sensor are buried into a part 2cm below the top surface of the pavement slab and are finally connected to a temperature collector; power is supplied by a storage battery so as to continuously measure the temperature of the cement concrete pavement slab. According to the method, obtained temperature data are relatively complete and relatively accurate; meanwhile, less auxiliary equipment is needed, and the operation is simple and easy to implement.
Description
Technical field
The invention belongs to road construction detection technique field, relate to a kind of Cement Concrete Pavement Slab temperature testing method.
Background technology
Temperature-warping stress is to cause one of principal element that road deck destroys, and the thermograde of road deck is one of important parameter of research road deck temperature-warping stress.The temperature that general employing temperature sensor is tested concrete structure inside at present, but temperature sensor is buried the time underground and arrangement does not have unified requirement, may make like this test job take a lot of work and time-consuming, even can make data and the real data measured have larger difference, thereby have influence on the accuracy that temperature-warping stress calculates.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of Cement Concrete Pavement Slab temperature testing method, can realize Cement Concrete Pavement Slab along the continuous coverage of depth direction temperature.
To achieve these goals, the technical solution used in the present invention is:
A thermograde method of testing in Cement Concrete Pavement Slab, comprises the following steps:
(1) according to the principle of upper tightly lower sparse, determine that road deck is along the test point number of depth direction and the corresponding depth of burying, wherein road deck surface, apart from position at the bottom of road deck plate top 2cm and road deck plate, be the essential point of test, apart from the vertical spacing of test point within the scope of the 10cm of plate top, getting 2～4cm, apart from the vertical spacing of test point beyond the 10cm scope of plate top, getting 3～6cm, all test points are 10cm along the level interval of travel direction, and the vertical range at the test point of edges of boards position and road deck edge is 5cm;
(2) each temperature sensor is started to measure the length of deep equality of living in it from probe with ruler, in this position, do to indicate, then, except the temperature sensor of plate top 2cm, all the other each temperature sensors are measured to the distance of 2cm from this sign toward probe orientation, in this position of shell, open an otch, make temperature sensor wiring can be converted into right angle;
(3) the burying underground of 1 hour laggard trip temperature sensor of construction of cement concrete pavement, before pavement concrete final set, complete burying underground of temperature sensor;
(4) along travel direction, every 10cm, drill through position test point and the required hole that runs through thickness of slab of edges of boards position measurement point in plate;
(5) apart from except the temperature sensor of plate top 2cm, all the other each temperature sensors are inserted in hole vertically, make wiring shell sign concordant with road surface, with concrete mix, hole is backfilled to again to the position of the surperficial 2cm of distance, temperature sensor apart from plate top 2cm is laterally placed in hole, in road surface, chisel the groove of one section of dark 2cm, and the wiring of all the sensors is embedded in groove, then use concrete mix backfill floating;
(6) for the test point on road deck surface, with adhesive plaster, temperature sensor is pasted on to the surface of edges of boards position, and on adhesive plaster, pricks several apertures to guarantee the convection current of air;
(7) connector lug of temperature sensor is connected to the measurement of the enterprising walking along the street panel temperature of Acquisition Instrument.
Compared with prior art, comparatively accurately, comprehensively, the required erecting device of test job is simultaneously less, simple, and the repeatability of test job is stronger for the measurement data that the present invention can guarantee road surface.
Accompanying drawing explanation
Fig. 1 is the choosing of position and edges of boards position measurement point in method of testing plate of the present invention.
Fig. 2 is method of testing of the present invention temperature sensor used.
Fig. 3 is the boring procedure schematic diagram of method of testing of the present invention.
Fig. 4 is the installation process schematic diagram of method of testing temperature sensor of the present invention, Fig. 4-1 is for vertically to reach the required degree of depth of test point by temperature sensor, Fig. 4-2 are for to be backfilling into lead-in wire incision with fresh concrete by hole, Fig. 4-3 are the excavation of groove, the lead-in wire that Fig. 4-4 are bending temperature sensor is placed in bottom portion of groove floating with fresh concrete backfill, and laterally lay for the temperature sensor apart from plate top 2cm Fig. 4-5.
Embodiment
Below in conjunction with drawings and Examples, describe embodiments of the present invention in detail.
Instrument equipment of the present invention comprises:
Temperature sensor: indication range is-99.9～+ 999.9 ℃, and display resolution is 0.1 ℃, and logging interval is 1s～10min, adopt 220VAC, 50HZ traffic Power supply, supports DC power supply, operating ambient temperature is 0～50 ℃, and humidity is 0～85%R.H.
Temperature sensor: PT100 waterproof thermal resistance, temperature-measuring range is-200～400 ℃, and probe diameter is 4mm, and length is 10mm, 3 connector lugs, the harder black plastic shell parcel of quality for connector lug, wire length can customize as required.
Accumulator: adopt 12V power supply.
A Cement Concrete Pavement Slab temperature testing method, comprises the following steps:
(1) as shown in Figure 1, according to the principle of upper tightly lower sparse, determine that road deck is along the test point number of depth direction and the corresponding depth of burying, wherein road deck surface, apart from position at the bottom of road deck plate top 2cm and road deck plate, be the essential point of test, the shared surface temperature test point in position and edges of boards position in plate.Apart from the vertical spacing of test point within the scope of the 10cm of plate top, getting 2～4cm, apart from the vertical spacing of test point beyond the 10cm scope of plate top, getting 3～6cm, all test points are 10cm along the level interval of travel direction, and the vertical range at the test point of edges of boards position and road deck edge is 5cm;
(2) with reference to Fig. 2, to each temperature sensor with ruler from 1 length that starts to measure deep equality of living in it of popping one's head in, in this position with the plastic casing of adhesive plaster 4 wrap connections 2 one weeks as a token of, then each temperature sensor (except the temperature sensor of plate top 2cm) is measured to the distance of 2cm from this sign toward probe orientation, and cut an otch 3 with pocket knife is careful in this position of shell, make temperature sensor wiring can be converted into right angle, while noting cutting, can not switch to wiring;
(3) the burying underground of 1 hour laggard trip temperature sensor of construction of cement concrete pavement, the time of burying underground can be done suitable adjustment according to concrete match ratio and local weather, but need guarantee to complete burying underground of temperature sensor before pavement concrete final set;
(4) with diameter, being about the rod iron 8 of 10mm and hammer 9 respectively drills through position test point 5 and edges of boards position measurement in plate along travel direction every 10cm and puts the 6 required holes that run through thickness of slab, edges of boards position measurement point 6 and road surface are 5cm the vertical range of edge over there, specifically with reference to Fig. 1 and Fig. 3;
(5) respectively by temperature sensor (except the temperature sensor of plate top 2cm) vertically in patchhole, make wiring shell adhesive tape sign 4 concordant with road surface, with concrete mix 12, hole is backfilled to again to the position of the surperficial 2cm of distance, temperature sensor apart from plate top 2cm is laterally placed in hole, with instruments such as trowels, in road surface, chisel the groove 13 that one section of degree of depth is about 2cm, and the wiring of all the sensors is embedded in groove, use again concrete mix backfill floating, specifically with reference to Fig. 4;
(6) for the test point 7 on road deck surface, directly with adhesive plaster, temperature sensor is pasted on to the surface of edges of boards position, and on adhesive plaster, prick several apertures to guarantee the convection current of air;
(7) connector lug of temperature sensor is connected on Acquisition Instrument, connects circuit, set the parameters such as logging interval and can carry out the measurement of road deck temperature.
Claims (1)
1. a thermograde method of testing in Cement Concrete Pavement Slab, is characterized in that, mainly comprises the following steps:
(1) according to the principle of upper tightly lower sparse, determine that road deck is along the test point number of depth direction and the corresponding depth of burying, wherein road deck surface, apart from position at the bottom of road deck plate top 2cm and road deck plate, be the essential point of test, apart from the vertical spacing of test point within the scope of the 10cm of plate top, getting 2～4cm, apart from the vertical spacing of test point beyond the 10cm scope of plate top, getting 3～6cm, all test points are 10cm along the level interval of travel direction, and the vertical range at the test point of edges of boards position and road deck edge is 5cm;
(2) each temperature sensor is started to measure the length of deep equality of living in it from probe with ruler, in this position, do to indicate, then, except the temperature sensor of plate top 2cm, all the other each temperature sensors are measured to the distance of 2cm from this sign toward probe orientation, in this position of shell, open an otch, make temperature sensor wiring can be converted into right angle;
(3) the burying underground of 1 hour laggard trip temperature sensor of construction of cement concrete pavement, before pavement concrete final set, complete burying underground of temperature sensor;
(4) along travel direction, every 10cm, drill through position test point and the required hole that runs through thickness of slab of edges of boards position measurement point in plate;
(5) apart from except the temperature sensor of plate top 2cm, all the other each temperature sensors are inserted in hole vertically, make wiring shell sign concordant with road surface, with concrete mix, hole is backfilled to again to the position of the surperficial 2cm of distance, temperature sensor apart from plate top 2cm is laterally placed in hole, in road surface, chisel the groove of one section of dark 2cm, and the wiring of all the sensors is embedded in groove, then use concrete mix backfill floating;
(6) for the test point on road deck surface, with adhesive plaster, temperature sensor is pasted on to the surface of edges of boards position, and on adhesive plaster, pricks several apertures to guarantee the convection current of air;
(7) connector lug of temperature sensor is connected to the measurement of the enterprising walking along the street panel temperature of Acquisition Instrument.
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| CN201310753239.1A CN103743496B (en) | 2013-12-31 | 2013-12-31 | A kind of temperature gradient in cement concrete pavement slab method of testing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784144A (en) * | 2016-03-22 | 2016-07-20 | 天津市市政工程设计研究院 | On-site road surface internal temperature test device and on-site drilling method |
| CN107103130A (en) * | 2017-04-19 | 2017-08-29 | 中国水利水电科学研究院 | The method that FEM calculation placing temperature is determined according to placing temperature measured value |
| CN108548757A (en) * | 2018-05-31 | 2018-09-18 | 华中科技大学 | A kind of test method of continuous reinforced concrete pavement solidification temperature curve |
| CN108627258A (en) * | 2018-04-24 | 2018-10-09 | 中国科学院合肥物质科学研究院 | A kind of installation method applied to armoured thermocouple in large component |
| CN109255766A (en) * | 2018-09-18 | 2019-01-22 | 清华大学 | Clinker phase identification method in a kind of cement-based material CT image based on Sobel edge detection |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784144A (en) * | 2016-03-22 | 2016-07-20 | 天津市市政工程设计研究院 | On-site road surface internal temperature test device and on-site drilling method |
| CN105784144B (en) * | 2016-03-22 | 2018-08-21 | 天津市市政工程设计研究院 | A kind of device of on-the-spot test road surface internal temperature and live boring method |
| CN107103130A (en) * | 2017-04-19 | 2017-08-29 | 中国水利水电科学研究院 | The method that FEM calculation placing temperature is determined according to placing temperature measured value |
| CN107103130B (en) * | 2017-04-19 | 2019-08-13 | 中国水利水电科学研究院 | The method for determining FEM calculation placing temperature according to placing temperature measured value |
| CN108627258A (en) * | 2018-04-24 | 2018-10-09 | 中国科学院合肥物质科学研究院 | A kind of installation method applied to armoured thermocouple in large component |
| CN108548757A (en) * | 2018-05-31 | 2018-09-18 | 华中科技大学 | A kind of test method of continuous reinforced concrete pavement solidification temperature curve |
| CN109255766A (en) * | 2018-09-18 | 2019-01-22 | 清华大学 | Clinker phase identification method in a kind of cement-based material CT image based on Sobel edge detection |
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| CN103743496B (en) | 2016-08-17 |
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