CN111648183A - Continuous compaction construction method for railway roadbed - Google Patents
Continuous compaction construction method for railway roadbed Download PDFInfo
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- CN111648183A CN111648183A CN202010447793.7A CN202010447793A CN111648183A CN 111648183 A CN111648183 A CN 111648183A CN 202010447793 A CN202010447793 A CN 202010447793A CN 111648183 A CN111648183 A CN 111648183A
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- compaction
- roadbed
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/08—Investigation of foundation soil in situ after finishing the foundation structure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
Abstract
The invention relates to the technical field of road construction, in particular to a continuous compaction construction method for a railway roadbed; the method comprises the following steps: (1) excavating a foundation pit; (2) carrying out a bearing capacity test on the substrate; (3) measuring and paying off, and scattering lime; (4) transporting the filler to a construction site; (5) spreading; (6) rolling and tamping the roadbed, and rolling the loose and paved soil layer by adopting a road roller with a continuous compaction system; after the compaction standard is met, a grader levels, and according to the input data and the actual compaction degree of on-site rolling, a road roller operation driver can clearly view images and numbers such as the compaction condition, uniformity, advancing speed and the like of the roadbed on a vehicle-mounted end tablet computer in real time; (7) detecting the roadbed, and transferring to the next layer of roadbed construction after the roadbed meets the requirement; the construction method adopts the roadbed continuous compaction method, reduces the detection times, reduces the construction difficulty, saves the construction period and obtains good economic and social benefits.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a continuous compaction construction method for a railway roadbed.
Background
Along with the enlargement of the traffic construction scale of China in recent years, the construction environment in the fields of highways, railway engineering, municipal engineering and the like is increasingly complex, the workload is continuously increased, the technical level is continuously improved, the problems of unqualified detection and rework frequently occur in the roadbed filling construction process under the influence of terrain conditions, filler quality, compaction pass and the like, the traditional roadbed filling method has the defects of long construction period, multiple detection times, dependence on experience and technology of a manipulator in the compaction process, easy occurrence of over-pressure or under-pressure, edge corner angle leaving and the like, the engineering progress is limited, the compactness of a compacted pavement is detected by a random point spot sampling detection method after completion, and the quality control method is only a result control method.
Disclosure of Invention
The invention provides a railway roadbed continuous compaction construction method for solving the technical problems that the traditional roadbed filling method has long construction period, a plurality of detection times, the compaction process depends on the experience and technology of a manipulator, over-pressure or under-pressure easily occurs, edge corner angles are left, and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: 1. a continuous compaction construction method for a railway roadbed is characterized by comprising the following steps:
(1) after the foundation pit is excavated to the designed elevation, carrying out expansibility detection on the filler soil;
(2) carrying out a bearing capacity test on the substrate, and carrying out the next roadbed filling construction after the design requirement is met;
(3) measuring and paying off, transversely arranging control piles on two sides of the roadbed and the center of the roadbed respectively, arranging a section at intervals of 50m in a longitudinal straight line section, arranging a section at intervals of 20m in a curve section, and marking the height on the control piles; paying off the roadbed, widening the roadbed to a width of 30cm, and scattering lime;
(4) the filler is transported, the improved soil filler is transported to a construction site by a dump truck after being intensively mixed at the construction site;
(5) paving, controlling the soil unloading amount of a roadbed in a strip-shaped grid mode, calculating the soil piling distance according to the soil loading amount of a loading vehicle, using lime to form grids, manually commanding soil unloading, and controlling the layered filling thickness from a source;
(6) rolling and tamping the roadbed, and rolling the loose and paved soil layer by adopting a road roller with a continuous compaction system; leveling by a grader after the compaction standard is achieved; wherein the rolling process comprises the following steps:
a. firstly, uniformly marking 6 point locations on a roadbed at a test section, measuring compaction values with different compaction degrees and VCV values corresponding to a system, and then processing data to obtain a correlation coefficient, a linear regression model and a target vibration compaction value between the vibration compaction value and a conventional quality acceptance index;
according to the field construction condition, carrying out continuous compaction detection after rolling the whole rolling surface for 1 time, carrying out first conventional detection, obtaining the comparison data of a mild area, then continuing rolling the rolling surface into a moderate area for detection, and finally rolling the rolling surface into a severe area for detection; (ii) a
b. According to the measured correlation coefficient, inputting data into a continuous compaction system of the road roller, and entering a monitoring system to check the real-time state of roadbed compaction after the system inputs a target vibration compaction value;
c. according to the recorded data and the actual rolling compaction degree on site, the road roller operation driver can clearly view images and numbers such as roadbed compaction condition, uniformity, advancing speed and the like on the vehicle-mounted end tablet personal computer in real time by the vehicle-mounted continuous compaction system;
the driver carries out the following operations in time according to the display condition to complete the continuous compaction of the roadbed:
firstly, displaying according to the running speed, and adjusting the running speed in time;
secondly, according to the compaction distribution map, supplementing the compaction undervoltage area in time;
the traveling route can be clearly observed at night through the display screen of the vehicle-mounted tablet personal computer;
a manager grasps the roadbed compaction degree, the compaction range, the compaction thickness and the running speed in real time through a remote monitoring system, and timely monitors and guides on-site construction to complete roadbed continuous compaction to reach the compaction standard;
(7) detecting the roadbed, detecting the roadbed formed by rolling after rolling, and rechecking the items of the roadbed elevation, the center line, the compaction degree and the like; and after the requirements are met, the construction is carried out on the next layer of roadbed.
The system analyzes and evaluates the compaction state of the roadbed through the reaction force (resistance) of the roadbed structure according to the interaction between a compaction machine tool and the roadbed by taking the vibratory roller as loading equipment, thereby realizing the continuous control of the compaction quality in the rolling process.
Through basic station transmission difference signal, reach centimetre level location through M30, direction position sensor cooperation reachs roll pass, track information and all information such as the frequency value of gathering through the compactness sensor all can transmit the ZD800 dull and stereotyped in the driver's cabin through the signal line on, make things convenient for the road roller hand to look over in real time and roll the condition, prevent excessive pressure and leak and press. The information collected by the flat plate is transmitted back to the server in real time in a GNSS wireless communication mode, all-weather and real-time checking and rolling construction operation is performed, and managers can check construction information, real-time rolling conditions, profile analysis, output related operation reports and the like at any Internet terminal.
Compared with the prior art, the invention has the following beneficial effects:
1. the measuring equipment used by the invention has high intelligent degree and simple operation, is arranged in the cab to display compaction information in real time and is convenient to operate. The rolling weak area and the unqualified area can be visually reflected, the site construction is guided, the range is independently reinforced, the construction efficiency is improved, and the reworking surface is reduced.
2. The previous snapshot detection is changed into the comprehensive detection of the whole rolling surface, and the compaction result is displayed visually on site.
3. By combining with the conventional method, the random control of the conventional detection can be changed into the control of a key (weak) area, the detection quantity in the conventional process can be greatly reduced, the range of the unqualified point of the conventional detection can be determined, the range is independently strengthened, and the reworked surface is reduced.
4. And the complete construction data is filed, so that a report can be conveniently generated.
5. The whole process monitoring of the construction engineering is realized: centimeter-level positioning, real-time track, pass, compaction degree, compaction thickness (layer number) and other digital information are synchronous with construction, the efficiency is high, the uniformity of compaction quality is ensured, and the rolling pass is optimized. The construction is not disturbed, and the pressure leakage is prevented. Through on-vehicle panel computer display screen, can be at clear line of marcing of watching at night with roll the face, prevent to leak and press, strengthened night construction quality greatly, tight to the time limit for a project, the heavy construction section of task has ensured continuity of operation's stability and sustainability.
6. The method is suitable for filling roadbed construction in general environment, and has a wide application range.
Detailed Description
The present invention is further illustrated by the following specific examples.
Examples
For the roadbed using similar fillers, a test section is firstly found, and the test section is generally not less than 200 m. The test procedure was as follows:
(1) after the foundation pit is excavated to the designed elevation, carrying out expansibility detection on the filler soil;
(2) carrying out a bearing capacity test on the substrate, and carrying out the next roadbed filling construction after the design requirement is met;
(3) measuring and paying off, transversely arranging control piles on two sides of the roadbed and the center of the roadbed respectively, arranging a section at intervals of 50m in a longitudinal straight line section, arranging a section at intervals of 20m in a curve section, and marking the height on the control piles; paying off the roadbed, widening the roadbed to a width of 30cm, and scattering lime; each side of the embankment filling width is wider than the designed width of the filling layer by 30cm, and the compaction width is not smaller than the designed width so as to ensure that the roadbed edge has enough compaction after the roadbed side slope is trimmed.
(4) The filler is transported, the improved soil filler is transported to a construction site by a dump truck after being intensively mixed at the construction site;
(5) paving, controlling the soil unloading amount of a roadbed in a strip-shaped grid mode, calculating the soil piling distance according to the soil loading amount of a loading vehicle, using lime to form grids, manually commanding soil unloading, and controlling the layered filling thickness from a source;
(6) rolling and tamping the roadbed, and rolling the loose and paved soil layer by adopting a road roller with a continuous compaction system; leveling by a grader after the compaction standard is achieved; wherein the rolling process comprises the following steps:
a. firstly, uniformly marking 6 point positions on a roadbed at a test section, measuring compaction values with different compaction degrees and VCV values corresponding to a system, and then processing data to obtain a correlation coefficient, a linear regression model and a target vibration compaction value between the vibration compaction value and a conventional quality acceptance index.
According to the field construction condition, carrying out continuous compaction detection after rolling the whole rolling surface for 1 time, carrying out first conventional detection, obtaining the comparison data of a mild area, then continuing rolling the rolling surface into a moderate area for detection, and finally rolling the rolling surface into a severe area for detection; generally, the region where the static pressure is 1 pass + the continuous compaction test is 1 pass is referred to as a light zone; a region in which static pressure is 1 time, strong vibration is 1 time, and continuous compaction detection is 1 time is called a moderate region; the region where the static pressure is 1 pass + the heavy shaking is n passes + the continuous compaction test is 1 pass is referred to as a heavy region. Generally, the light, medium and heavy areas are all the same roadbed, but are called differently at different periods of rolling compaction. These three areas may also be different sections of subgrade when multiple tests are required.
b. According to the measured correlation coefficient, inputting data into a continuous compaction system of the road roller, and entering a monitoring system to check the real-time state of roadbed compaction after the system inputs a target vibration compaction value;
c. according to the recorded data and the actual rolling compaction degree on site, the road roller operation driver can clearly view images and numbers such as roadbed compaction condition, uniformity, advancing speed and the like on the vehicle-mounted end tablet personal computer in real time by the vehicle-mounted continuous compaction system;
the driver carries out the following operations in time according to the display condition to complete the continuous compaction of the roadbed:
firstly, displaying according to the running speed, and adjusting the running speed in time to ensure that the running speed meets the requirements of specifications and technical interaction;
secondly, according to the compaction distribution map, a compaction undervoltage area is supplemented in time in a key mode, and the roadbed is prevented from being over undervoltage;
the traveling route can be clearly observed at night through the display screen of the vehicle-mounted tablet personal computer, so that pressure leakage is prevented, and the construction quality at night is greatly enhanced;
a manager grasps the roadbed compaction degree, the compaction range, the compaction thickness and the running speed in real time through a remote monitoring system, and timely monitors and guides on-site construction to complete roadbed continuous compaction to reach the compaction standard;
when the roadbed bed bottom layer and the embankment below the bottom layer are rolled, the compaction operation is performed according to the operation rules that the edge of the road-pressing foundation is firstly rolled, the middle of the road-pressing foundation is secondly rolled, the longitudinal advancing and retreating is firstly slow and then fast, the static pressure is firstly followed by the vibration, and the weak vibration is changed into the strong vibration. When the surface layer of the foundation bed is constructed, the straight line section is rolled from the road shoulders at the two sides to the center of the road; in the curve section, rolling is carried out from the inner side shoulder to the outer side shoulder, the rolling is carried out slowly and then quickly, static pressure is carried out firstly and then vibration is carried out, rolling is carried out according to the operation rule from weak vibration to strong vibration, and no obvious rolling wheel trace exists on the surface after the rolling is finished.
(7) Detecting the roadbed, detecting the roadbed formed by rolling after rolling, and rechecking the items of the roadbed elevation, the center line, the compaction degree and the like; and after the requirements are met, the construction is carried out on the next layer of roadbed.
Further, in the step (6), the maximum driving speed of the road roller is not more than 4km/h, the joint of each section is overlapped and compacted, the longitudinal lap length is not less than 2m, the tracks between longitudinal rows are overlapped and compacted by not less than 40cm, and the filling joints of the upper layer and the lower layer are staggered by not less than 3 m.
The core of the continuous compaction system is that the roadbed using similar fillers is firstly subjected to test section construction, data are obtained during each compaction, and a VCV value (vibration compaction value) acted by the continuous compaction system each time is obtained. And then, after each vibration compaction, detecting according to the standard requirement to obtain indexes such as a compaction coefficient K/foundation coefficient K30 and the like corresponding to the compaction value at the time. And then continuously rolling and detecting to obtain a plurality of groups of data. The relationship between the VCV value (vibration compaction value) and the K value/K30 value was obtained by linear regression analysis. In the subsequent construction, the continuous compaction system can use the vibration compaction value to control the rolling times, the walking tracks and the like. And when the vibration compaction value which is calculated in the regression equation and is qualified for detection is reached, the roadbed detection is carried out, and the roadbed detection can be qualified under the normal condition.
The construction method can obviously shorten the filling-detection time of each layer of roadbed, and according to the actual measurement comparison with the traditional roadbed construction method, the method takes a single-line roadbed with the length of 200m, the height of 5m and the top width of 8m (the filling amount is about 1.5 ten thousand) as an example, and can save about 1 hour in use per filling layer on average. The section of roadbed saves 16h in use, and can reduce 1 person as an assistant in the traditional roadbed filling. The cost is saved: 2000 yuan for 2 mechanical shifts, 400 yuan for the labor cost of a driver and 400 yuan for the labor cost of staff, and 2800 yuan.
Claims (3)
1. A continuous compaction construction method for a railway roadbed is characterized by comprising the following steps:
(1) after the foundation pit is excavated to the designed elevation, carrying out expansibility detection on the filler soil;
(2) carrying out a bearing capacity test on the substrate, and carrying out the next roadbed filling construction after the design requirement is met;
(3) measuring and paying off, transversely arranging control piles on two sides of the roadbed and the center of the roadbed respectively, arranging a section at intervals of 50m in a longitudinal straight line section, arranging a section at intervals of 20m in a curve section, and marking the height on the control piles; paying off the roadbed, widening the roadbed to a width of 30cm, and scattering lime;
(4) the filler is transported, the improved soil filler is transported to a construction site by a dump truck after being intensively mixed at the construction site;
(5) paving, controlling the soil unloading amount of a roadbed in a strip-shaped grid mode, calculating the soil piling distance according to the soil loading amount of a loading vehicle, using lime to form grids, manually commanding soil unloading, and controlling the layered filling thickness from a source;
(6) rolling and tamping the roadbed, and rolling the loose and paved soil layer by adopting a road roller with a continuous compaction system; leveling by a grader after the compaction standard is achieved; wherein the rolling process comprises the following steps:
a. firstly, uniformly marking 6 point locations on a roadbed at a test section, measuring compaction values with different compaction degrees and VCV values corresponding to a system, and then processing data to obtain a correlation coefficient, a linear regression model and a target vibration compaction value between the vibration compaction value and a conventional quality acceptance index;
according to the field construction condition, carrying out continuous compaction detection after rolling the whole rolling surface for 1 time, carrying out first conventional detection, obtaining the comparison data of a mild area, then continuing rolling the rolling surface into a moderate area for detection, and finally rolling the rolling surface into a severe area for detection;
b. according to the measured correlation coefficient, inputting data into a continuous compaction system of the road roller, and entering a monitoring system to check the real-time state of roadbed compaction after the system inputs a target vibration compaction value;
c. according to the recorded data and the actual rolling compaction degree on site, the road roller operation driver can clearly view images and numbers such as roadbed compaction condition, uniformity, advancing speed and the like on the vehicle-mounted end tablet personal computer in real time by the vehicle-mounted continuous compaction system;
the driver carries out the following operations in time according to the display condition to complete the continuous compaction of the roadbed:
the travelling speed is adjusted in time according to the travelling speed display;
secondly, according to the compaction distribution map, supplementing the compaction undervoltage area in time;
the traveling route can be clearly observed at night through the display screen of the vehicle-mounted tablet personal computer;
a manager grasps the roadbed compaction degree, the compaction range, the compaction thickness and the running speed in real time through a remote monitoring system, and timely monitors and guides on-site construction to complete roadbed continuous compaction to reach the compaction standard;
(7) detecting the roadbed, detecting the roadbed formed by rolling after rolling, and rechecking the items of the roadbed elevation, the center line, the compaction degree and the like; and after the requirements are met, the construction is carried out on the next layer of roadbed.
2. The continuous compaction method for a railroad bed according to claim 1, wherein the rolling variables in the step (6 a) are performed according to the following manner:
(1) mild zone: static pressure is carried out for 1 time and continuous compaction detection is carried out for 1 time;
(2) middle zone: static pressure is carried out for 1 time, strong vibration is carried out for 1 time, and continuous compaction detection is carried out for 1 time;
(3) a severe area: static pressure is carried out for 1 time, strong vibration is carried out for n times, and continuous compaction detection is carried out for 1 time.
3. The continuous compaction construction method for the railway subgrade as claimed in claim 1, wherein in the step (6), the maximum driving speed of the road roller is not more than 4km/h, the joint of each section is compacted in an overlapping mode, the longitudinal overlapping length is not less than 2m, the tracks between longitudinal rows are compacted in an overlapping mode and are not less than 40cm, and the filling joints of the upper layer and the lower layer are staggered and are not less than 3 m.
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Cited By (4)
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| CN112647387A (en) * | 2020-12-23 | 2021-04-13 | 海西州蓄集峡水利枢纽工程建设管理局 | Continuous compaction control method for rock-fill dam |
| CN113250042A (en) * | 2021-05-06 | 2021-08-13 | 黑龙江工程学院 | Detection method for rolling quality of high-speed railway roadbed |
| CN114232649A (en) * | 2022-01-31 | 2022-03-25 | 中铁六局集团广州工程有限公司 | Construction method for filling earthwork of ballastless track roadbed |
| CN115353363A (en) * | 2022-07-19 | 2022-11-18 | 中铁西安勘察设计研究院有限责任公司 | Coal gangue filler and construction method for filling railway roadbed by coal gangue filler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112647387A (en) * | 2020-12-23 | 2021-04-13 | 海西州蓄集峡水利枢纽工程建设管理局 | Continuous compaction control method for rock-fill dam |
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| CN114232649A (en) * | 2022-01-31 | 2022-03-25 | 中铁六局集团广州工程有限公司 | Construction method for filling earthwork of ballastless track roadbed |
| CN114232649B (en) * | 2022-01-31 | 2022-08-09 | 中铁六局集团广州工程有限公司 | Construction method for filling earthwork of ballastless track roadbed |
| CN115353363A (en) * | 2022-07-19 | 2022-11-18 | 中铁西安勘察设计研究院有限责任公司 | Coal gangue filler and construction method for filling railway roadbed by coal gangue filler |
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Application publication date: 20200911 |