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Basic data
| Standard ID | JT/T 1127-2017 (JT/T1127-2017) |
| Description (Translated English) | Technical requirements for continuous compaction control system of fill engineering of subgrade for highway |
| Sector / Industry | Highway & Transportation Industry Standard (Recommended) |
| Classification of Chinese Standard | P66 |
| Word Count Estimation | 21,281 |
| Date of Issue | 2017-04-12 |
| Date of Implementation | 2017-08-01 |
| Regulation (derived from) | Ministry of Transport Notice No. 12 of 2017 |
| Issuing agency(ies) | Ministry of Transport |
JT/T 1127-2017: Technical requirements for continuous compaction control system of fill engineering of subgrade for highway
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Technical Condition of Continuous Compaction Control System for Highway Subgrade Filling)
Directory
Preface II
1 Scope 1
2 normative reference document 1
3 Terms and definitions 1
System composition and function
Technical requirements 2
6 Test method 4
Appendix A (normative) Relativity Verification Test 7
Appendix B (Normative Appendix) Rolling Process Control Test 11
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1 -.2009.
This standard is proposed by the National Traffic Engineering Facilities (Highway) Standardization Technical Committee (SAC/TC 223).
The main drafting unit of this standard. Dalian East Road Technology Co., Ltd., Ministry of Transportation Highway Science Research Institute.
This standard participates in the drafting unit. Shenyang East Road Technology Co., Ltd., Southwest Jiaotong University, Harbin Institute of Technology, China Construction Machinery Industry
Association Road and Compaction Machinery Branch, Heilongjiang Provincial Highway Survey and Design Institute, Gansu Provincial Department of Transportation, Xugong Group Road Machinery Division, Hill
Push Road Machinery Co., Ltd., Xinjiang Transportation Construction Group.
The main drafters of this standard. Xu Guanghui, Tian Bo, Gao Hui, E Yuhui, Huang Jun, Luo Zehua, Han Lizhi, Wang Dongsheng, Yin Liwen, Qin Peixin,
Zhao Zhihang, Wu Jingwu, Liang Junping, Fu Jun, Ding Yinping, Ren Huajie, Chen Wenji, Zhang Jialing, Huang Yong
Technical Condition of Continuous Compaction Control System for Highway Subgrade Filling
1 Scope
This standard specifies the system composition and function, technical requirements and test methods for the continuous compaction control system of highway subgrade filling works.
This standard is applicable to the continuous compaction control system in the process of roadbed filling and rolling.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
JJG 676 working vibrometer verification procedures
Technical specification for JT G F10 highway subgrade construction
Technical specification for continuous compaction control of railway subgrade filling works
3 terms and definitions
TB 10108 and the following terms and definitions apply to this document.
3.1
Continuous compaction control
Subgrade filling rolling process, according to the filling body and vibration roller interaction with each other principle, through continuous measurement vibration vibrator vibration
Wheel vertical vibration response signal, the establishment of detection and evaluation and feedback control system to achieve the entire crushed surface compaction quality of real-time dynamic monitoring and
control.
3.2
Compaction state compaction state
The physical and mechanical properties of the subgrade structure under the action of the road roller are carried out during the rolling process.
3.3
Vibration compaction value
Based on the vibratory roller in the process of rolling vibration vibration signal generated by the vertical response to the compaction of the compaction state of the mechanical
index.
3.4
Compaction degree
During the process of rolling, the compaction value of the vibration reaches the target vibration compaction value.
3.5
Compaction stability
Subgrade filling rolling process, in the vibration of the vibratory compaction process parameters of a certain circumstances, the roadbed compaction state with the rolling times
The nature of the.
3.6
Compaction uniformity
The consistency of the distribution of physical and mechanical properties (compaction state) of each part of the rolling surface during the rolling process.
3.7
Correlation verify correlation verify
The process of establishing the relationship between the vibration compaction value and the conventional quality detection index is established by comparing the test method.
4 system components and functions
4.1 system components
4.1.1 continuous compaction control system consists of loading equipment, measuring equipment, background compaction information management platform and remote compaction information management platform group
Into, the system composition shown in Figure 1.
Description.
1 --- loading equipment;
2 --- measuring equipment;
3 --- background compaction information management platform;
4 - remote compaction information management platform.
Figure 1 continuous compaction control system composition diagram
4.1.2 Load the equipment as a vibratory roller.
4.1.3 measuring equipment by the vibration sensor, signal conditioning, data acquisition, analysis and processing, display devices and system control software and other components.
4.1.4 Background compaction information management platform consists of compaction data management software, computer and network.
4.1.5 Remote compaction information management platform consists of compaction information receiving software, database, computer and network.
4.2 System functions
4.2.1 Continuous compaction control system shall have the ability to verify the consistency of the monitoring results with the conventional test results.
4.2.2 Continuous compaction control system shall have the ability to monitor the rolling speed and vibration frequency of vibratory rollers in real time.
4.2.3 Continuous compaction control system should have the degree of compaction of the filling body, compaction uniformity, compaction stability and compaction state
Cloth and other real-time analysis and graphical and digital display capabilities.
4.2.4 Continuous compaction control system should have the ability to transmit and manage compaction monitoring information.
5 technical requirements
5.1 Load the device
5.1.1 Vibratory compaction process of vibratory roller, vibration wheel distribution quality, exciting force, vibration frequency, amplitude and rolling speed
The parameters should be clearly identified.
5.1.2 vibratory roller roller vibration frequency should be stable, the fluctuation range should not exceed the stability of ± 0.6Hz.
5.1.3 Vibratory roller roller rolling speed should be kept uniform, rolling speed should be (2.5 ~ 3.0) km/h, the maximum should not exceed 4.0km/h.
5.1.4 Vibratory roller machine should provide the vibration frequency and rolling speed of the corresponding signal interface, the corresponding location should be installed on the measurement equipment installation interface.
5.2 Measuring equipment
5.2.1 vibration measuring device vibration sensor should adopt the acceleration sensor, the sensitivity should not be less than 10mV/(m/s2), the range should not be less than
10g, the frequency response should not be greater than 5kHz.
5.2.2 The number of analog-to-digital conversion bits of the data acquisition device of the measuring equipment shall be not less than 16, and the sampling frequency shall not be less than 400Hz.
5.2.3 The dynamic performance of the measuring equipment should be stable, the linear range of vibration amplitude in the (5 ~ 100) m/s2 when the relative error should not be greater than
0.5%, the vibration frequency in the (5 ~ 120) Hz when the relative error should not be greater than 0.5%.
5.2.4 The correlation between the vibration compaction value of the output of the measuring device and the conventional inspection index shall be not less than 0.70.
5.2.5 System control software for measuring equipment should have the following functions.
a) control the operation of the measurement equipment, real-time measurement of measurement information, processing, analysis, display and storage, record the construction-related parameters
information;
b) According to the obtained compaction information on compaction degree, compaction uniformity, compaction stability, compaction state distribution and related statistics, etc.
Real-time analysis and digital and graphical display;
c) the transmission and management of compaction information.
5.3 background compaction information management platform
The background compaction information management platform should have the following functions.
a) receiving compaction information transmitted by the measuring device;
b) secondary processing of compaction information recorded in the field;
c) display and manage compaction profiles, compaction uniformity profiles, compaction stability profiles and compaction profiles;
d) the test results generated test report, the report should be consistent with the requirements of 6.6;
e) Generate unmodifiable electronic data packets and transmit them to the remote compaction information management platform in a certain form.
5.4 Remote Compaction Information Management Platform
The remote compaction information management platform should have the following functions.
a) receiving compaction information from the background compaction information management platform or measuring equipment transmission;
b) display or replay the field compaction process and related content;
c) manage the relevant compaction information in a database.
5.5 System connection
5.5.1 The vibration sensor of the measuring device shall be installed tightly and vertically in the center of the inner frame of the vibratory roller of the vibratory roller,
Vibration sensor installation location shown in Figure 2.
Description.
1-roller vibrating wheel; 4-outer rack;
2 - vibration sensor; 5 - shock absorber.
3 - inner rack
Figure 2 vibration sensor installation location signal
5.5.2 The signal connection between the vibration sensor and the data acquisition device shall be securely fastened to the frame of the vibratory roller.
5.5.3 The data acquisition and display device of the measuring equipment shall be securely installed on the front side of the cab of the vibratory roller to facilitate operation.
6 test method
6.1 Load the device
6.1.1 Vibratory compaction of the vibratory roller The compaction process parameters shall be verified according to the identification and product specifications and shall comply with the requirements of 5.1.1.
6.1.2 Fluctuation test of vibration frequency of vibratory roller The following test procedure is carried out.
a) According to the requirements of 5.5 measurement equipment and vibration roller connection, select (30 ~ 50) m of the road, in the vibratory roller is
Constant vibration rolling state, open the measurement device frequency test function, the vibration frequency of the measurement, record the measured frequency
Value, the number of records should be no less than 30;
b) compare the measured vibration frequency and the rated vibration frequency difference, should meet the requirements of 5.1.2;
c) The vibration frequency of the vibratory roller can also be tested using a common frequency meter.
6.1.3 Vibratory roller The test of the rolling speed is carried out as follows.
a) Select (30 ~ 50) m of the road, the vibratory roller to the speed of construction rolling, the use of stopwatch record travel time t, mining
Measuring the walking distance L with steel ruler;
b) Calculate the rolling speed of the vibratory roller according to the speed formula (1), which shall meet the requirements of 5.1.3.
v = L/t (1)
Where. v --- roller rolling speed, in meters per second (m/s);
L --- distance traveled in meters (m);
t - travel time in seconds (s).
6.1.4 Vibratory roller vibration frequency and rolling speed The corresponding signal interface inspection is carried out according to the following steps.
a) connecting the measuring device with the vibration frequency and the rolling speed interface of the vibratory roller;
b) In the vibratory roller vibration test state, turn on the data acquisition function of the measuring equipment, see the vibration frequency and rolling speed
The display of the vibration frequency data and the rolling speed data should be consistent with the test results of 6.1.2 and 6.1.3.
6.2 Measuring equipment
6.2.1 The performance parameters of the vibration sensor of the measuring device shall be verified according to the product specification and shall meet the requirements of 5.2.1.
6.2.2 The number of analog-to-digital conversion bits of the data acquisition device of the measuring device is verified according to the product specification. The sampling frequency is controlled by turning on the system
Control software to collect the data collection menu, and then according to the unit time to collect the number of data to be tested, should be consistent with 5.2.2
Claim.
6.2.3 Measurement of vibration amplitude characteristics and vibration frequency characteristics of the measuring equipment The following steps are carried out.
a) Install the vibration sensor of the measuring device on the vibration table with the standard shaking table complying with the requirements of JJG 676.
Prepared by the data acquisition function for vibration test;
b) Adjust the vibration frequency of the shaking table to 5Hz, then start the vibration amplitude from 5m/s2, according to the amplitude of 5m/s2
Line step by step to 100 m/s2, observation and measurement equipment on the screen display the actual vibration amplitude output, compared with the standard value, the phase
The error should meet the requirements of 5.2.3;
c) adjust the vibration frequency of the vibration table, adjust the amplitude of 5Hz, and then repeat b) steps until the adjustment to the vibration frequency of 120Hz, its
The relative error between the actual vibration amplitude and the standard value shall meet the requirements of 5.2.3;
d) Adjust the vibration amplitude of the shaking table to 5m/s2, and then start the vibration frequency from 5Hz, according to the amplitude of 5Hz
Step by step adjustment to 120Hz, observation and measurement equipment on the screen display the actual vibration frequency output, compared with the standard value, the relative error
Poor should meet the requirements of 5.2.3;
e) Adjust the vibration amplitude of the shaking table by adjusting the amplitude of 5 m/s2 and repeat step d) until the amplitude of vibration is adjusted to
100 m/s2, the actual vibration frequency and the standard value of the relative error should meet the requirements of 5.2.3.
6.2.4 The correlation coefficient between the vibration compaction value and the routine inspection index shall be tested according to the correlation verification test. The operation is shown in Appendix A,
The number of relationships shall meet the requirements of 5.2.4.
6.2.5 Test of the system control software of the measuring equipment The following steps are carried out.
a) open the data acquisition function of the measuring device, observe the display function on the screen, should meet the requirements of 5.2.5a)
b) to carry out rolling process control test, the operation see Appendix B, open the measurement equipment, data acquisition and analysis functions, test its analysis
And the display function shall comply with the requirements of 5.2.5b);
c) Turn on the data transmission function of the measurement equipment, transmit the compaction information, check the information management platform through the background or remote compaction
Its transmission function and effect, should meet the requirements of 5.2.5c).
6.3 background compaction information management platform
The background compaction information management platform is tested by the software running menu. Open the corresponding function, check the compaction information to receive, process, display,
Generate electronic reporting and transmission effects, should meet the requirements of 5.3.
6.4 Remote Compaction Information Management Platform
The remote compaction information management platform is tested by the software running menu. Open the corresponding function, check the compaction information to receive, display, data
Playback, database management functions and effects, should meet the requirements of 5.4.
6.5 System connection
6.5.1 Installation of the vibration sensor According to the visual inspection of the field, the degree of tightness is verified by opening the vibrator vibration.
The requirements of 5.5.1.
6.5.2 Connection of signal cables shall be verified according to field visual inspection and shall comply with the requirements of 5.5.2.
6.5.3 Installation of data acquisition and display devices According to the visual inspection, it shall meet the requirements of 5.5.3.
6.6 Test results
6.6.1 Continuous compaction control system After the test is completed, the test results should be processed and the corresponding test report should be prepared. The test report should be
Equipment performance test report, correlation test report and rolling process control test report composition.
6.6.2 The test report of the continuous compaction control system shall be automatically generated by the background compaction information management platform and shall meet the following requirements.
a) the test report shall be displayed graphically and digitally;
b) The compaction state distribution and compaction profile contained in the test report shall be 100 m in length,
Less than 100m in length;
c) Test report related information should be easy to read and store the data format;
d) The test report shall, in addition to the regular archiving, carry out electronic data archiving.
6.6.3 Equipment performance test report shall include vibration vibrator vibration frequency test curve, measurement equipment vibration amplitude characteristic test curve and
Vibration frequency characteristic test curve and so on.
6.6.4 Relevant test The test report shall include comparative test data, correlation coefficient, regression model, etc., see table A.1 of Appendix A,
The compaction state of the test section and the vibration compaction curve of the rolling wheel.
6.6.5 Rolling process control test report should include the rolling process archiving report, compaction state distribution map and compaction degree distribution map, see attached
Record
6.6.6 Continuous compaction control system test report In addition to providing a graphical compaction situation, the following additional
information.
a) Project information. project name, file number, rolling section starting and ending mileage, filling width, filling thickness, filling layer, packing type,
Rolling area, rolling times, rolling date and time;
b) loading information. vibration roller working quality, vibration wheel distribution quality, exciting force, vibration frequency, amplitude, speed and so on;
c) Quality information. the qualified value of the routine inspection index and the corresponding target vibration compaction value, the maximum value of the test data, the minimum value, the pole
Difference, mean value, coefficient of variation and other statistics, vibration machine working frequency of the maximum, minimum and average, compaction state points
Group number and group spacing, statistical histogram and so on.
Appendix A
(Normative appendix)
Correlation test
A.1 Test preparation
A.1.1 The correlation test shall include determining the correlation between the vibration compaction value and the conventional test index, the correlation and the target vibration
Dynamic compaction value.
A.1.2 The test section of the relevant qualification test shall be constructed in accordance with JT G F10 and shall comply with the following requirements.
a) the test section of the filler, moisture content and layer thickness should be the same with the parameters of the rolling section;
b) the length of the test section should not be less than 100m;
c) The test section shall be of the same vibratory roller and vibration compaction process parameters as the rolling section;
d) test section should be divided into three rolling area, respectively, by mild, moderate and severe compaction state of three compaction, including heavy pressure
Real state area should meet the routine inspection eligibility criteria;
e) The test surface of the rolling surface should be flat and no water, and meet the relevant standards;
f) Test data and the use of vibration roller and other relevant information should be documented.
A.1.3 Dependency Check the continuous compaction control system should be checked and meet the following requirements.
a) Check the installation and connection of the measuring equipment, confirm that the installation is correct and connected firmly;
b) Check the vibration compaction process parameters of the vibratory roller to be measured, and confirm that the vibration frequency is kept at the allowable fluctuation of the steady value
, The speed is uniform and meets the requirements of 5.1.3.
A.1.4 Relevance Verification tests shall be repeated in any of the following cases.
a) the test section of filler, moisture content and layer thickness changes;
b) the measurement of vibratory roller or its vibration compaction process parameters change;
c) Measurement equipment changes.
A.2 Test procedure
A.2.1 Relevance Verification Tests are carried out as follows.
a) Set the test section start and end mark lines according to the length of the test section;
b) the continuous compaction test of the crushed compaction surface of the test section is carried out, and then the routine test index is tested;
c) continuous compaction test should be carried out on the entire rolling surface, should adopt the flat grinding method ①, vibration roller adjacent roller between the overlapping
Width should be controlled within 10cm;
① Note. flat grinding method refers to the vibratory roller in the rolling surface in turn on the forward rolling operation, in which two adjacent track rolling lap widt...
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