CN110927257A - Detection system and method for detecting compaction quality of affected area of basic flight area - Google Patents
Detection system and method for detecting compaction quality of affected area of basic flight area Download PDFInfo
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- 238000005056 compaction Methods 0.000 title claims abstract description 124
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- 238000012354 overpressurization Methods 0.000 description 1
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- G01N29/04—Analysing solids
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Abstract
The invention discloses a system and a method for detecting compaction quality of a basic flight area road surface influence area in real time on line, in particular to a method for detecting and checking compaction quality of an airport flight area road surface influence area in real time. The method can quickly, accurately and efficiently detect the compaction degree and uniformity of the compaction layer without damage, establish acceptance criteria and effectively guide compaction construction management.
Description
Technical Field
The invention relates to the technical field of construction engineering, in particular to a detection system and a method for detecting compaction quality of an affected area of a basic flight area in real time on line.
Background
The most important process for the construction of the airport flight area road surface influence area during compaction construction operation. At present, compaction quality indexes of civil airports are mainly compactness and roadbed reaction modulus (k)0) California Bearing Ratio (CBR) index. The management and control of compaction quality are realized through the indexes in site construction. The current compaction quality detection mainly has the following problems:
(1) the compaction quality detection method obtains detection indexes through sampling, the problem that whether a sampling point is representative exists, the whole construction quality cannot be reflected, and the area and distribution of an area with unqualified compaction quality cannot be accurately reflected after the quality problem is found;
(2) the construction of the airport flight area pavement affected area has high requirements on post-construction settlement, the differential settlement runway along the longitudinal post-construction needs 1.0-1.5 per thousand, the requirement on the uniformity of field compaction is high, and the conventional detection method cannot reflect whether the field compaction quality is uniform and reaches the standard;
(3) the quality detection method belongs to post-production control, is low in efficiency, can be used for carrying out the next construction after detection is finished, needs rework after problems are found, increases labor cost and influences construction progress;
meanwhile, the compaction quality detection and construction process has the problem of disjointing, and the airport compaction construction lacks a relatively complete construction detection management system for managing and monitoring the compaction quality, so that the level of the integral compaction quality of the site is ensured.
Disclosure of Invention
The invention aims to solve the technical problem of a detection system and a detection method for detecting the compaction quality of an affected area of a basic flight area, which can accurately monitor the compaction degree of a compaction filler in real time and evaluate whether the compaction degree meets the specification or design requirements.
The invention is realized by the following technical scheme: the vertical vibratory roller generates and transmits stress waves to the compaction layer through nonlinear vibration of the vibratory wheel and the compaction layer in the rolling construction process; when the amplitude of the stress wave is larger than the elastic limit of the compacted layer, the compacted layer generates plastic deformation under the action of the stress wave and is compacted step by step, and the capability of the stress wave passing through the compacted layer is enhanced; the stress wave is reflected at the interface of a lower horizontal layer or different compacted layers, and the stress wave reflected to the interface of the contact of the vibration wheel and the compacted layers changes the stress state and the vibration form of the vibration wheel; acquiring acceleration continuous change signals of the vibrating wheel, calculating and acquiring stress wave frequency spectrum characteristics reflected to the vibrating wheel, acquiring continuous compaction indexes, and judging compaction quality.
The technical scheme provided by the invention for solving the technical problems is as follows: a method for detecting compaction quality in real time on line comprises the following steps: firstly, acquiring continuous acceleration signals of a vibrating wheel in the vertical direction through an acceleration sensor arranged on the vibrating wheel in the process of filling a road surface influence area of a rolling mill field flying area of the vibrating road roller vibrating in the vertical direction; secondly, performing curve fitting on the acceleration signal of the vibrating wheel through a processor arranged on the vibrating road roller, analyzing the frequency spectrum characteristics of the reflected stress wave received by the vibrating wheel in 3-4 vibration periods, and calculating the characteristic value of the continuous compaction index; thirdly, establishing an evaluation system and a standard of the compaction quality by combining the practical situation of the engineering: two methods can be divided: the first method is to establish the correlation between the continuous compaction index E and the conventional detection index through a field correlation calibration test to determine the qualified standard [ E ] of the compaction quality. When judging, the minimum value E in the field is more than or equal to 0.9[ E ], the unqualified total area proportion is less than or equal to 10%, and if no large continuous unqualified area exists, the field compaction reaches the standard; and the second method is to utilize a continuous compaction technology to carry out comprehensive coverage detection on a compacted layer or a field, carry out weak analysis, assist other conventional detection and evaluate the compaction quality or the rigidity of an underlying layer of the whole field.
The following are necessary: before compaction quality detection, the field needs to be subjected to preliminary treatment, and the rigidity of the underlying layer is greater than or equal to the rigidity of the compacted layer after the compacted layer reaches the compaction standard.
The following are necessary: the compacted filling material is kept as consistent as possible, and the filling material does not contain pebbles with protruding grain diameter, and fine grain groups with embossed and bonded grain diameters.
The essential steps are that in the first step, the emergency frequency of the vibratory roller needs to be kept stable within the range of <2Hz, the amplitude needs to be kept stable within the range of <0.1mm, the running speed needs to be kept constant within the range of △ v <1km/h, the vibration of the vibratory roller is stable and repeated, and the roller with unstable vibration cannot be used for compaction quality detection.
Preferably: in the second step, after the acceleration signal forms a fitting curve, a method for calculating the frequency spectrum characteristics of the frequency spectrum of the reflected stress wave is adopted, a Fourier harmonic analysis method is adopted, and a formula is used
The following are necessary: when 1/2 subharmonics appear in harmonic analysis, the phenomenon of jumping vibration of the vibrating wheel is indicated, and the continuous compaction index value is invalid.
Preferably: in the second step, the wave velocities of the reflected stress waves of different frequencies are analyzed and calculated according to a formula
Preferably: in the third step, the first method is as follows: firstly, selecting a filler which has a uniform lower layer, a representative site and the same construction type in a construction site; secondly, dividing the compaction degree into a light state, a medium state and a heavy state according to the change of a compaction layer in compaction construction, and respectively carrying out the compaction degree and the roadbed reaction modulus (k) under the three states0) California load bearing ratio (CBR) to measure compaction quality; thirdly, performing linear regression calculation on the continuous compaction index value and the conventional monitoring index by adopting a least square method, when the correlation coefficient is more than or equal to 0.70, the correlation is established, and E corresponding to the qualified value of the conventional index is the site compaction qualified standard [ E ]]。
Preferably, the principle of the first method in the third step is as follows: according to the formula E ═ ρ C2Under the condition that the compacted layer is not changed, the continuous compaction index E and the compacted layer density rho present a linear correlation relationship; according to the formula
The energy of the stress wave is linearly related to the elastic modulus of the compacted layer.
The following are necessary: in the third step, the first method is that in the calibration and calibration test, the calibration and calibration of the lower lying layer must be uniform, and the rolling degree is the same; before calibration, continuous compaction detection is required; when detected on the same compaction path, the successive compaction index curves must be similar, with the poles of the curves all at the same coordinates.
Preferably: and in the third step, in the second method, the weak analysis is a method for finding out a continuous compaction index E minimum area in the field through continuous compaction detection, the area with the minimum E value is the area with the worst rigidity and density of a compaction layer, conventional monitoring for acceptance check is carried out in the areas, and if the conventional detection meets the requirement, the whole field is judged to meet the requirement.
The following are necessary: in the third step, the second method is applicable to the site with the maximum size not exceeding 5000m2Or a length of no more than 250 m; the area of the determined weak area is not less than 10m2(ii) a The weak areas must be determined after the last compaction pass.
Preferably: in the third step, the second method can divide the field into a plurality of areas during the use process.
Preferably: the second method in the third step may also be used to assess the uniformity of the stiffness of the compacted layer or to find areas of overpressurization in the field.
The invention also aims to provide a construction management method based on the continuous compaction detection compacted layer quality method, which comprises a vertical vibratory roller, a detection unit, a positioning device, a background comprehensive management system and a display client side; the vertical vibratory roller is used for rolling and compacting a layer; the detection unit is used for detecting the compaction degree of the compaction layer in real time; the positioning device is used for positioning the continuous compaction index value coordinate; the background comprehensive management system is used for managing and recording construction progress, continuous compaction indexes and coordinate information in compaction construction; and the display client is used for providing engineering compaction comprehensive conditions and real-time information for all parties participating in the engineering.
Compared with the prior art, the method for rapidly detecting the compaction quality of the affected area of the airport flight area in real time has the following beneficial effects: the invention is based on the compaction principle of stress wave propagation and elastic-plastic deformation of the compacted filling, detects the stress wave signal reflected by the compacted layer received by the vibrating wheel in real time, and judges the qualified degree of the compacted quality by establishing a quality judgment standard and a method for evaluating the compacted quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a vertical vibratory roller construction inspection operation;
FIG. 2 is a basic schematic of compaction detection and continuous compaction values E of the present invention;
FIG. 3 is a schematic representation of the packing of the present invention being compacted by plastic deformation under stress waves;
FIG. 4 is a schematic view of a linear correlation calibration test site of the present invention;
fig. 5 is a schematic view showing the flow of information in construction management using the continuous compaction detection method.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1 to 5, the method for detecting and evaluating compaction quality of an affected area of a basic flight area in real time on line according to the embodiment. The method comprises the following steps:
step S1: in the rolling construction process of any vertical vibratory roller with stable performance in engineering, acquiring an acceleration signal of a vibratory wheel in the vertical direction through an acceleration sensor arranged on the side surface of the vibratory wheel;
step S2: the acceleration signal is processed to calculate a continuous compaction index value E.
Step S21: automatically fitting the acquired acceleration signal into a continuous acceleration change curve through a detection unit arranged on the vibratory roller;
step S22: carrying out harmonic analysis on the acceleration change curve by using Fourier transform, wherein the formula is as follows:
in the formula: a is0To adjust the coefficient; a is1、a2、…akReflecting stress wave amplitude for the vibration wheel and different frequency; theta1、θ2、…θkThe phase angles of the stress waves reflected by the vibrating wheel and different frequencies are shown.
Step S23: and (3) calculating the wave velocity of each reflected stress wave by combining the properties of the filler, and calculating a continuous compaction index value E by the following formula:
in the formula: e is a continuous compaction index value; rho is a compacted layer density constant; ckIs the reflected stress wave velocity.
Step S3: and establishing an evaluation system and standard of compaction quality.
Step S31: selecting a calibration site at a site to be constructed, and setting the length of a test site to be 30m, as shown in fig. 3, which is a calibration schematic diagram of the calibration site; carrying out rolling treatment on a lower lying layer of a test field, carrying out continuous compaction detection, and recording a continuous compaction index change curve; after the first layer of filler is compacted, dividing the second layer of filler into light, medium and heavy compaction degrees; selecting representative areas in the continuous compaction index curve to respectively carry out compaction degree and roadbed reaction modulus (k)0) California Bearing Ratio (CBR), at least 3 to 5 times per method.
Step S32: and performing linear correlation analysis on the continuous compaction index E and the conventional detection index by using a least square method, wherein a similar formula is as follows:
y＝a+b*x
step S33: and when the correlation r is more than or equal to 0.7, calculating the continuous compaction index qualification standard [ E ] by combining the corresponding conventional detection index according to the formula of the step S32. In site operation, when the continuous compaction index E is more than or equal to E, the compaction quality is considered to be reached, and the compaction of the relevant area can be stopped.
Step S34: quality control and acceptance criteria: after the continuous compaction detection of the field is finished, calculating the average value of all E values
And standard deviation sigma, continuous compaction test target value
In the field less than [ E]The area of the area is less than 10 percent, and no large continuous weak area exists, and the field compaction quality is judged to be qualified.
Example two
In another embodiment of the present invention, the first step and the second step in this embodiment are similar to the method in the embodiment, and the description of the same parts is omitted, and only the differences will be described.
In this embodiment, it is disclosed that step S3 specifically includes the following steps:
step S31: dividing the field into a plurality of areas with the area not more than 5000m2Or the partition with the length not more than 250m is subjected to continuous compaction detection after the last compaction according to the construction process is finished, and the continuous compaction index value plane distribution map is formed after the complete detection;
step S32: the area of the plane distribution map of the continuous compaction index value is selected to be more than or equal to 10m2Detecting representative weak areas in a conventional mode;
step S33: and (3) data analysis: if two conditions that the adjacent continuous compaction index values and the conventional monitoring index show an integral positive correlation and the continuous compaction index values are generally presented as Gaussian distribution in the distribution diagram are met, the continuous compaction index value plane distribution diagram can be used as a reference basis for field detection or acceptance check. Site detection passes acceptance conditions:
in the formula: n is the total number of continuous compaction detection index values in the field; n is a radical oflimIs below the calibration standard value [ E]The number of the cells. If not, it is not qualified.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (10)
1. The utility model provides a real-time on-line measuring basis flight area influence district compaction quality's detecting system which characterized in that: the system comprises a vertical vibratory roller, a detection unit, a positioning device, a background comprehensive management system and a display client; the vertical vibratory roller is used for rolling and compacting a layer; the detection unit is used for detecting the compaction degree of the compaction layer in real time and is arranged on the vertical vibratory roller; the positioning device is used for positioning the continuous compaction index value coordinate; the background comprehensive management system is used for managing and recording construction progress, continuous compaction indexes and coordinate information in compaction construction; the display client is used for providing engineering compaction comprehensive conditions and real-time information for all parties participating in the engineering, the signal output end of the vertical vibratory roller is connected with the background comprehensive management system, and the background comprehensive management system transmits the information to the display client for display.
2. The system for real-time on-line detection of compaction quality in an affected area of a base flight area as defined in claim 1, wherein: the positioning device comprises a global satellite positioning system and a positioning system base station.
3. The system for real-time on-line detection of compaction quality in an affected area of a base flight area as defined in claim 1, wherein: and the vertical vibratory roller is also provided with an onboard processor, a positioning system antenna and a speedometer, and the positioning information and the speed information are transmitted to the background comprehensive management system through the onboard processor.
4. A real-time online detection method for compaction quality of an affected zone of a basic flight zone surface is characterized by comprising the following steps:
step one, acquiring continuous acceleration signals of a vibrating wheel in the vertical direction through an acceleration sensor arranged on the vibrating wheel in the process of filling a road surface influence area of a rolling mill field of the vibrating road roller vibrating in the vertical direction;
step two, performing curve fitting on the acceleration signal of the vibrating wheel through a processor arranged on the vibrating road roller, analyzing the frequency spectrum characteristics of the reflected stress wave received by the vibrating wheel in 3-4 vibration periods, and calculating the characteristic value of the continuous compaction index;
and step three, establishing an evaluation system and a standard of compaction quality by combining with the actual conditions of the engineering.
5. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 4, wherein the method comprises the following steps: in the second step, after the acceleration signal forms a fitting curve, a method for calculating the frequency spectrum characteristics of the frequency spectrum of the reflected stress wave is adopted, a Fourier harmonic analysis method is adopted, and a formula is used
6. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 4, wherein the method comprises the following steps: the method comprises the following steps of: the first is that through the field correlation calibration test, the correlation between the continuous compaction index E and the conventional detection index is established to determine the qualified standard [ E ] of the compaction quality, when judging, the minimum value of E in the field is more than or equal to 0.9[ E ], the unqualified total area proportion is less than or equal to 10%, and if no large continuous unqualified area exists, the field compaction reaches the standard; and the second method is to utilize a continuous compaction technology to carry out comprehensive coverage detection on a compacted layer or a field, carry out weak analysis, assist other conventional detection and evaluate the compaction quality or the rigidity of an underlying layer of the whole field.
7. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 4, wherein the method comprises the following steps: analyzing and calculating the wave velocity of the reflected stress waves of different frequencies according to a formula
Calculating the deformation modulus of the compacted layer, wherein: e is the deformation modulus of the compacted layer; rho is a compacted layer density constant; and Ck is the wave velocity of the reflected stress wave.
8. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 6, wherein the method comprises the following steps: the principle of the first method in the third step is as follows: according to the formula E ═ ρ C2Under the condition that the compacted layer is not changed, the continuous compaction index E and the compacted layer density rho present a linear correlation relationship; according to the formula
The energy of the stress wave and the elastic modulus of the compacted layer are in a linear correlation relationship;
in the calibration and calibration test, the calibration and calibration of the lower lying layer must be uniform, and the rolling degree is the same; before calibration, continuous compaction detection is required; when detected on the same compaction path, the successive compaction index curves must be similar, with the poles of the curves all at the same coordinates.
9. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 6, wherein the method comprises the following steps: and in the second method in the third step, the weak analysis is a method for finding out a continuous compaction index E minimum area in the field through continuous compaction detection, the area with the minimum E value is an area with the worst rigidity and density of a compaction layer, conventional monitoring for acceptance check is carried out in the areas, and if the conventional detection meets the requirement, the whole field is judged to meet the requirement.
10. The method for detecting the compaction quality of the influence area of the basic flight area in real time on line according to claim 9, wherein the method comprises the following steps: the second method in the third step is applicable to the site with the maximum length of not more than 5000m2 or the length of not more than 250 m; the determined area of the weak area is not less than 10m 2; the weak areas must be determined after the last compaction pass, and the field can be divided into a plurality of areas during use, and the areas can also be used for evaluating the uniformity of the rigidity of the compacted layer or searching for areas with excessive pressure in the field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911115293.7A CN110927257A (en) | 2019-11-14 | 2019-11-14 | Detection system and method for detecting compaction quality of affected area of basic flight area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911115293.7A CN110927257A (en) | 2019-11-14 | 2019-11-14 | Detection system and method for detecting compaction quality of affected area of basic flight area |
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| CN112127342A (en) * | 2020-10-19 | 2020-12-25 | 四川升拓检测技术股份有限公司 | Method for monitoring roadbed compaction quality based on frequency spectrum and amplitude |
| CN113158558A (en) * | 2021-04-02 | 2021-07-23 | 哈尔滨理工大学 | High-speed railway roadbed continuous compaction analysis method, device and analyzer |
| CN114673051A (en) * | 2022-03-17 | 2022-06-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed compaction quality continuous detection system and method suitable for compaction and application |
| CN114693024A (en) * | 2020-12-29 | 2022-07-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method and device for evaluating continuous compaction of high-speed railway roadbed |
| CN115374826A (en) * | 2022-08-29 | 2022-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Machine soil direct contact type filler compaction state distinguishing method and application |
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| CN111783542A (en) * | 2020-06-02 | 2020-10-16 | 长江大学 | Method and device for automatically extracting reflection period of stress wave |
| CN111783542B (en) * | 2020-06-02 | 2024-05-31 | 长江大学 | Method and device for automatically extracting stress wave reflection period |
| CN112127342A (en) * | 2020-10-19 | 2020-12-25 | 四川升拓检测技术股份有限公司 | Method for monitoring roadbed compaction quality based on frequency spectrum and amplitude |
| CN112127342B (en) * | 2020-10-19 | 2022-03-04 | 四川升拓检测技术股份有限公司 | Method for monitoring roadbed compaction quality based on frequency spectrum and amplitude |
| CN114693024A (en) * | 2020-12-29 | 2022-07-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method and device for evaluating continuous compaction of high-speed railway roadbed |
| CN113158558A (en) * | 2021-04-02 | 2021-07-23 | 哈尔滨理工大学 | High-speed railway roadbed continuous compaction analysis method, device and analyzer |
| CN113158558B (en) * | 2021-04-02 | 2023-02-24 | 哈尔滨理工大学 | High-speed railway roadbed continuous compaction analysis method, device and analyzer |
| CN114673051A (en) * | 2022-03-17 | 2022-06-28 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed compaction quality continuous detection system and method suitable for compaction and application |
| CN114673051B (en) * | 2022-03-17 | 2023-11-17 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed compaction quality continuous detection system, roadbed compaction quality continuous detection method and roadbed compaction quality continuous detection application |
| CN115374826A (en) * | 2022-08-29 | 2022-11-22 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Machine soil direct contact type filler compaction state distinguishing method and application |
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