CN111089527A - Pavement crack monitoring device and monitoring method - Google Patents
Pavement crack monitoring device and monitoring method Download PDFInfo
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- CN111089527A CN111089527A CN201911254768.0A CN201911254768A CN111089527A CN 111089527 A CN111089527 A CN 111089527A CN 201911254768 A CN201911254768 A CN 201911254768A CN 111089527 A CN111089527 A CN 111089527A
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- pavement
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- pavement slab
- measuring
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 36
- 239000010959 steel Substances 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000005553 drilling Methods 0.000 claims description 4
- 229910000840 Capped steel Inorganic materials 0.000 claims 2
- 230000008602 contraction Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 6
- 239000004568 cement Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/026—Means for indicating or recording specially adapted for thermometers arrangements for monitoring a plurality of temperatures, e.g. by multiplexing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Road Repair (AREA)
Abstract
The invention relates to a pavement crack monitoring device and a monitoring method, wherein the monitoring device comprises a temperature measuring unit and a deformation measuring unit, wherein the temperature measuring unit comprises: the system comprises a plurality of temperature sensing recorders and a data reader, wherein the temperature sensing recorders are pre-embedded in a road panel block; the deformation measurement unit includes: the measuring tool comprises a plurality of cross-shaped cap steel nails fixed on the side surface of the pavement slab, and a measuring tool used for measuring the distance between the two cross-shaped cap steel nails. The invention can complete the measurement of the expansion and contraction deformation of the pavement slab cracks by a temperature sensing recorder pre-embedded in the pavement slab and measuring the distance change between two cross-shaped cap steel nails respectively positioned at two sides of the cracks without expensive equipment.
Description
Technical Field
The invention relates to the field of building construction, in particular to a pavement crack monitoring device and a pavement crack monitoring method.
Background
At present, in order to promote urban economic development and bring convenience to people's trip, highway construction is developed rapidly. In the existing road, the crack incidence rate of the cement concrete pavement is high, under the general condition, the crack of the cement concrete pavement can generate width change due to temperature change in the external environment, the value can only be measured in a laboratory under the common condition, and the measurement result has certain deviation from the actual condition; under the field condition, the determination of the cracks of the cement concrete pavement is limited by a plurality of practical conditions, such as high cost of professional equipment and harsh use conditions, which are generally difficult to realize.
Disclosure of Invention
The invention provides a pavement crack monitoring device and a pavement crack monitoring method, which aim to solve the technical problem.
In order to solve the above technical problem, the present invention provides a pavement crack monitoring device, including a temperature measuring unit and a deformation measuring unit, wherein the temperature measuring unit includes: the system comprises a plurality of temperature sensing recorders and a data reader, wherein the temperature sensing recorders are pre-embedded in a road panel block; the deformation measurement unit includes: the measuring tool comprises a plurality of cross-shaped cap steel nails fixed on the side surface of the pavement slab, and a measuring tool used for measuring the distance between the two cross-shaped cap steel nails.
Preferably, the number of the temperature sensing recorders is 3, and the heights of the 3 temperature sensing recorders in the road panel block are different.
Preferably, the 3 temperature sensing recorders are sequentially arranged at a position 20 mm away from the top of the pavement slab, on the middle line of the pavement slab and at a position 20 mm away from the bottom of the pavement slab.
Preferably, the distance between the temperature sensing recorder and the nearest edge of the road slab is 1 meter.
Preferably, the height of the cross-shaped cap steel nail protruding out of the side face of the pavement slab is 5 mm.
Preferably, a base point is embedded at a position corresponding to each cross-shaped cap steel nail.
Preferably, the measuring tool is a vernier caliper, and the base point includes a bayonet matched with a measuring jaw of the vernier caliper.
In another aspect of the present invention, a pavement crack monitoring method is provided, which includes the following steps:
s1: when the pavement slab block is constructed, a plurality of temperature sensing recorders are embedded in the pavement slab block, and each temperature sensing recorder is connected with an exposed data line connector;
s2: after the pavement slab is poured for 48 hours, drilling holes in the side face of the pavement slab, and implanting cross-shaped cap steel nails;
s3: measuring the distance between two cross-shaped cap steel nails respectively positioned at two sides of the crack;
s4: and (4) connecting a data reader with the temperature sensing recorder through an exposed data wire joint to obtain temperature data, and combining the distance data between the two cross-shaped cap steel nails measured in the step S3 to obtain the change condition of the crack under different temperature conditions.
Preferably, the measuring tool is aligned with the cross center of the cross-shaped cap steel nail, and the distance between the two cross-shaped cap steel nails is measured.
Preferably, the temperature data and the distance data are collected in the morning, at noon, in the afternoon and at night 14 days before the pavement slab is constructed, and the measurement is performed every three days after 14 days.
Compared with the prior art, the pavement crack monitoring device and the pavement crack monitoring method provided by the invention have the following advantages:
1. the invention does not need expensive equipment, and can complete the measurement work of the expansion and contraction deformation of the pavement slab cracks by a temperature sensing recorder pre-embedded in the pavement slab and measuring the distance change between two cross-shaped cap steel nails respectively positioned at the two sides of the cracks;
2. the monitoring device provided by the invention also has the advantages of convenience in movement, high efficiency, low cost, no occupation of a construction site and the like.
Drawings
FIG. 1 is a top view of a pavement crack monitoring apparatus in accordance with one embodiment of the present invention;
FIG. 2 is a longitudinal sectional view of a temperature sensing recorder mounted on a pavement slab in accordance with an embodiment of the present invention;
fig. 3a to 3c are schematic views illustrating the cross-head steel nails assembled on the pavement slab according to an embodiment of the present invention.
In the figure: 10-pavement slab, 11-crack, 20-temperature sensing recorder and 30-cross cap steel nail.
Detailed Description
In order to more thoroughly express the technical scheme of the invention, the following specific examples are listed to demonstrate the technical effect; it is emphasized that these examples are intended to illustrate the invention and are not to be construed as limiting the scope of the invention.
The pavement crack monitoring device provided by the invention is shown in figure 1 and combined with figures 3a to 3c, and comprises a temperature measuring unit and a deformation measuring unit, wherein the temperature measuring unit comprises: a plurality of temperature sensing recorders 20 pre-embedded in the pavement slab 10, and a data reader (not shown) connected to the plurality of temperature sensing recorders 20, wherein the data reader is held by a user; the deformation measurement unit includes: a plurality of cross-cap steel nails 30 fixed to the side of the pavement slab 10, and a measuring tool (not shown) for measuring a distance between two of the cross-cap steel nails 30. The invention can complete the measurement of the expansion and contraction deformation of the crack 11 of the pavement slab 10 by a temperature sensing recorder 20 pre-embedded in the pavement slab 10 and measuring the distance change between two cross-shaped cap steel nails 30 respectively positioned at two sides of the crack 11 without expensive equipment.
Preferably, the temperature sensing recorder 20 of the present invention can be a button type temperature sensing recorder, for example, model number DS 1921. Specifically, please refer to fig. 2 with emphasis, the number of the temperature sensing recorders 20 is 3, and the heights of the 3 temperature sensing recorders 20 in the pavement slab 10 are different, in this embodiment, the 3 temperature sensing recorders 20 are sequentially disposed at a position 20 mm away from the top of the pavement slab 10, on the centerline of the pavement slab 10, and at a position 20 mm away from the bottom of the pavement slab 10, so as to improve the measurement accuracy of the temperature sensing recorders 20, and at the same time, the normal construction and use of the pavement are not affected. Preferably, please refer to fig. 1 with emphasis, the distance between the temperature sensing recorder 20 and the edge of the nearest road surface slab 10 is 1 meter, so as to further improve the measurement accuracy of the temperature sensing recorder 20.
In addition, the temperature measuring unit may be equipped with one temperature measuring gun to measure the temperature of the top surface of the pavement slab 10.
Preferably, referring to fig. 3a to 3c, the height of the cross-head steel nail 30 protruding from the side of the pavement slab 10 is 5 mm, so as to facilitate later measurement.
Preferably, with continued reference to fig. 3a to 3c, a base point (not shown) is embedded at a position corresponding to each of the cross-head steel nails 30, so as to be used as a reference for measuring the distance variation of the steel nail at the later stage. Specifically, in the present embodiment, the measuring tool is a vernier caliper, for example, a high-precision vernier caliper with a model number of Mitutoyo 500-.
The monitoring device provided by the invention has the advantages of high construction efficiency, convenience in movement and low cost.
The invention also provides a pavement crack monitoring method, please refer to fig. 1 to 3c, comprising the following steps:
s1: when the pavement slab 10 is constructed, a plurality of temperature sensing recorders 20 are pre-embedded in the pavement slab 10, each temperature sensing recorder 20 is connected with an exposed data line joint (not shown), the data line joints are well protected by adhesive tapes, and one end of each temperature sensing recorder is left outside the pavement slab 10, so that a data reader can be conveniently connected in the later period;
s2: after the pavement slab 10 is poured for 48 hours, drilling holes on the side surfaces of the pavement slab 10, for example, drilling holes in the expansion joints and expansion joints of the pavement slab 10 and the pavement slab 10 (in the length direction) by using a small electric drill, and implanting cross-shaped cap steel nails 30;
s3: measuring the distance between two cross-shaped cap steel nails 30 respectively positioned at two sides of the crack 11 (such as an expansion joint, a dilatation joint and the like), preferably, aligning the cross center of the cross-shaped cap steel nail 30 by using a measuring tool, and measuring the distance between the two cross-shaped cap steel nails 30, thereby improving the measurement precision;
s4: and (3) connecting a data reader with the temperature sensing recorder 20 through an exposed data wire joint to obtain temperature data, and combining the distance data between the two cross-head steel nails 30 measured in the step S3 to obtain the change condition of the crack 11 under different temperature conditions.
The method better solves the problem of measuring the expansion and contraction change of the cracks 11 of the on-site pavement slabs 10, and has simple construction and no influence on normal construction progress.
Preferably, the temperature data and the distance data are collected 14 days before the pavement slab 10 is constructed, every morning, noon, afternoon, and night, and the measurement is performed every three days after 14 days. The change of the pavement plate 10 in the early stage (the first 14 days) is obvious, the data acquisition is more intensive, the change of the pavement plate 10 in the later stage (the later 14 days) is very small, the measurement interval can be properly increased, the energy consumption is reduced on the premise of not influencing the measurement accuracy, and the service life of equipment is prolonged.
In summary, the pavement crack monitoring device and method provided by the present invention include a temperature measuring unit and a deformation measuring unit, wherein the temperature measuring unit includes: the temperature sensing and recording device comprises a plurality of temperature sensing and recording devices 20 pre-buried in a pavement slab 10 and a data reading instrument connected with the temperature sensing and recording devices 20; the deformation measurement unit includes: a plurality of cross-cap steel nails 30 fixed to the side of the pavement slab 10, and a measuring tool for measuring the distance between two of the cross-cap steel nails 30. The invention can complete the measurement of the expansion and contraction deformation of the crack 11 of the pavement slab 10 by a temperature sensing recorder 20 pre-embedded in the pavement slab 10 and measuring the distance change between two cross-shaped cap steel nails 30 respectively positioned at two sides of the crack 11 without expensive equipment.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A pavement crack monitoring device is characterized by comprising a temperature measuring unit and a deformation measuring unit, wherein,
the temperature measuring unit includes: the system comprises a plurality of temperature sensing recorders and a data reader, wherein the temperature sensing recorders are pre-embedded in a road panel block;
the deformation measurement unit includes: the measuring tool comprises a plurality of cross-shaped cap steel nails fixed on the side surface of the pavement slab, and a measuring tool used for measuring the distance between the two cross-shaped cap steel nails.
2. The pavement crack monitoring device of claim 1, wherein the number of the temperature sensing recorders is 3, and the heights of the 3 temperature sensing recorders in the pavement slab block are different.
3. The pavement crack monitoring device of claim 2, wherein the 3 temperature sensing recorders are sequentially disposed at a distance of 20 mm from the top of the pavement slab, on the middle line of the pavement slab, and at a distance of 20 mm from the bottom of the pavement slab.
4. A pavement crack monitoring device as claimed in claim 2 or 3, characterized in that the distance between the temperature sensing recorder and the nearest edge of the pavement slab is 1 meter.
5. The pavement crack monitoring device of claim 1, wherein the cross-cap steel nails protrude from the side of the pavement slab by a height of 5 mm.
6. The pavement crack monitoring device according to claim 1, wherein a base point is embedded at a position corresponding to each of the cross-head steel nails.
7. The pavement crack monitoring device of claim 6, wherein the measuring implement is a vernier caliper, and the base point comprises a bayonet that is matched with a measuring jaw of the vernier caliper.
8. A pavement crack monitoring method is characterized by comprising the following steps:
s1: when the pavement slab block is constructed, a plurality of temperature sensing recorders are embedded in the pavement slab block, and each temperature sensing recorder is connected with an exposed data line connector;
s2: after the pavement slab is poured for 48 hours, drilling holes in the side face of the pavement slab, and implanting cross-shaped cap steel nails;
s3: measuring the distance between two cross-shaped cap steel nails respectively positioned at two sides of the crack;
s4: and (4) connecting a data reader with the temperature sensing recorder through an exposed data wire joint to obtain temperature data, and combining the distance data between the two cross-shaped cap steel nails measured in the step S3 to obtain the change condition of the crack under different temperature conditions.
9. The method of claim 8, wherein the distance between two cross-capped steel nails is measured by aligning a gauge with the center of the cross-capped steel nails.
10. The method of claim 8, wherein the temperature data and distance data are collected every morning, noon, afternoon, and night 14 days before the pavement slab is constructed, and the measurement is performed every three days from 14 days later.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911254768.0A CN111089527A (en) | 2019-12-10 | 2019-12-10 | Pavement crack monitoring device and monitoring method |
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| CN201911254768.0A CN111089527A (en) | 2019-12-10 | 2019-12-10 | Pavement crack monitoring device and monitoring method |
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|---|---|---|---|---|
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| CN211552682U (en) * | 2019-12-10 | 2020-09-22 | 上海建工集团股份有限公司 | Pavement crack monitoring devices |
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2019
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425307A (en) * | 2011-10-19 | 2012-04-25 | 江苏瑞峰建设集团有限公司 | Casting method for avoiding formation of mass concrete cracks |
| CN204730882U (en) * | 2015-05-29 | 2015-10-28 | 辽宁省交通科学研究院 | Based on the asphalt pavement crack width real-time monitoring system of Radio Transmission Technology |
| CN106767360A (en) * | 2016-12-31 | 2017-05-31 | 长江三峡勘测研究院有限公司（武汉） | A kind of digital vernier formula crack gauge and its application method for Fracture Deformation monitoring |
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| CN107815938A (en) * | 2017-10-19 | 2018-03-20 | 清华大学 | A kind of Synthesis Support System of severe cold area concrete extension joint quality control on construction |
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