CN103993533B - For the comprehensive debulking methods of Canal in Loess Area high-filled embankment - Google Patents
For the comprehensive debulking methods of Canal in Loess Area high-filled embankment Download PDFInfo
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- CN103993533B CN103993533B CN201410262497.4A CN201410262497A CN103993533B CN 103993533 B CN103993533 B CN 103993533B CN 201410262497 A CN201410262497 A CN 201410262497A CN 103993533 B CN103993533 B CN 103993533B
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Abstract
The present invention relates to construction technology in geotechnical engineering field, specifically a kind of comprehensive debulking methods for Canal in Loess Area high-filled embankment, the steps include: (1) earthen foundation surface clear table 30cm and the 2m that backbreaks, after backbreaking, soil matrix adopts tamping process lower floor ground, and effective treating depth is not less than 1m; (2) compacting after thick 6% dirt of soil matrix elongated making 1m and compacting; (3) after making dirt, plain native placement in layers compacting, every layer of filling-up thickness is not more than 300mm, and compacting adopts 18t vibratory roller to roll with the walking speed of 4km/h, and coefficient of consolidation is not less than 96%; (4) often fill 3m and adopt tamping reinforcement one time; (5) 1m place under plain earthen backfill to roadbed, backfills 6% dirt and compacting in 1m under roadbed.Comprehensive debulking methods for Canal in Loess Area high-filled embankment of the present invention, the basis of traditional vibratory roller compaction process is mended in conjunction with weight the construction technology of ramming, shortens the preloading phase.
Description
Technical field
The present invention relates to construction technology in geotechnical engineering field, specifically a kind of comprehensive debulking methods for Canal in Loess Area high-filled embankment.
Background technology
Traditional high-filled embankment processing method is generally adopt vibration, impact road roller place Min layers soil, layered rolling, these class methods require that embankment just can carry out laying of roadway through the preloading phase of longer (being generally 6 to 12 months) after construction, obviously can not meet the requirement of duration in the highway construction of construction period anxiety.Moreover these traditional high roadbed treatment technologies, the effect when processing superelevation loess filling body is unsatisfactory, and some effective technique in use, or is subject to the restrictions such as site factors, can not meet design requirement.
Summary of the invention
The present invention, in order to solve prior art Problems existing, provides a kind of comprehensive debulking methods for Canal in Loess Area high-filled embankment can eliminated or reduce the rear For Embankment Settlements of construction as far as possible.
The present invention is achieved by the following technical solutions: for the comprehensive debulking methods of Canal in Loess Area high-filled embankment,
The steps include:
(1) earthen foundation surface is clear shows 30cm and the 2m that backbreaks, and after backbreaking, soil matrix adopts tamping process lower floor ground, and effective treating depth is not less than 1m;
(2) compacting after thick 6% dirt of soil matrix elongated making 1m and compacting;
(3) after making dirt, plain native placement in layers compacting, every layer of filling-up thickness is not more than 300mm, and compacting adopts 18t vibratory roller to roll with the walking speed of 4km/h, and coefficient of consolidation is not less than 96%;
(4) often fill 3m and adopt tamping reinforcement one time;
(5) 1m place under plain earthen backfill to roadbed, backfills 6% dirt and compacting in 1m under roadbed.
Comprehensive debulking methods for Canal in Loess Area high-filled embankment of the present invention, the basis of traditional vibratory roller compaction process is mended in conjunction with weight the construction technology of ramming, not only shorten the preloading phase, also effectively eliminate the settlement by soaking of loess, reach reduction of erection time, cost-saving and eliminate or reduce as far as possible the object of For Embankment Settlements after work simultaneously, method is practical, successful, safe and feasible.
Accompanying drawing explanation
Fig. 1 is of the present invention for tamping point quincuncial arrangement figure in the comprehensive debulking methods of Canal in Loess Area high-filled embankment.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is illustrated further.
For the comprehensive debulking methods of Canal in Loess Area high-filled embankment,
The steps include:
(1) earthen foundation surface is clear shows 30cm and the 2m that backbreaks, and after backbreaking, soil matrix adopts tamping process lower floor ground, and effective treating depth is not less than 1m;
(2) compacting after thick 6% dirt of soil matrix elongated making 1m and compacting;
(3) after making dirt, plain native placement in layers compacting, every layer of filling-up thickness is not more than 300mm, and compacting adopts 18t vibratory roller to roll with the walking speed of 4km/h, and coefficient of consolidation is not less than 96%;
(4) often fill 3m and adopt tamping reinforcement one time;
(5) 1m place under plain earthen backfill to roadbed, backfills 6% dirt and compacting in 1m under roadbed.
During concrete enforcement, the use of the present invention to roadbed filling (6% dirt, element soil) should meet following requirement:
I. the intensity of filler and particle diameter, should meet the regulation of table 1:
Table 1 roadbed filling minimum strength and maximum particle diameter requirement
II. filler preferentially selects the ubiquitous loess in this area as filler, forbids use mud, organic soil, turf, household garbage and contain rotten substance soil.
III. the fine grained soils that liquid limit is greater than 50%, index of plasticity is greater than 26, water content is not suitable for direct compacting, must not directly as embankment fill material; During as used, technical measures must be taked to process, testing after the designing requirement of Full foot can use through inspection.
During concrete enforcement, in step of the present invention (2) before making 6% dirt, first native wall loose soil, vegetation are cleared up, make an overall screening thickness and be not less than 50cm.
Step of the present invention (3) plain soil fills in compacting process, after embankment district one laminin soil filler material loading completes, by the filling-up thickness of thickness 30cm, giant caterpillar formula bulldozer is adopted tentatively to shakeout, the edge that cannot arrive for machinery is manually levelling, and after tentatively shakeouing element soil filler on roll back and forth, complete preliminary consolidation; After every layer of preliminary consolidation completes, form road camber and form draining.
Step of the present invention (3) plain soil fills in compacting process, and roll width and must not be less than design width, what be convenient to later stage side slope cuts slope; And straightway when rolling by both sides to centre, sharp radius curve section is by Inside To Outside, longitudinal advance and retreat formula is carried out, transverse joint overlap 0.4 ~ 0.5m(desirable 0.4,0.45 or 0.5m), longitudinal rolling wheelmark overlap 0.4 ~ 0.5m(desirable 0.4,0.45 or 0.5m), during vibratory roller first pressing adopt static pressure, after change vibratory compaction into.
The pass of step of the present invention (4) tamping is 3 times, front is for twice ram by the spaced points of quincuncial arrangement, last time is full rammer, the number of ramming of same point is 5 to 6 to hit, the last two average ramming volumes hit are less than 20mm, and make bottom surface around tamping pit that excessive protuberance not occur, can not cross because of tamping pit the problem that difficulty has occurred to hammer into shape deeply.As shown in Figure 1, first pass rams No. 1 main tamping point to described quincuncial arrangement, rams No. 2 secondary tamping points for second time.During concrete enforcement, the intermittent time between tamping twice is 3 ~ 7 days (desirable 3,5 or 7 days).
During concrete use, the rammer of the heavy tamping machine tool of tamping can be 500KN ﹒ m, and the heavy 5t of hammer ram, falls apart from 10m.The spaced points of quincuncial arrangement is rammed and 1.6 times can be adopted to hammer footpath point into shape apart from (point is apart from 1.6D between main tamping point and main tamping point, and the point between secondary tamping point and secondary tamping point is apart from 1.6D), and before tamping, each tamping point marks lime outline line by hammer ram bed-plate dimension.
After step of the present invention (4) tamping process, quality inspection criterion of acceptability is: after heavily rammer construction terminates, within the scope of 3m treating depth, the coefficient of collapsibility of soil layer is less than 0.015.
After step of the present invention (4) completes, if do not carry out step (5) at once, 200 ~ 300mm thick soil stratum need be reserved, excavate again during next step construction.
During concrete enforcement, if when meeting the process of new-old concrete bond boundary, step (3) and step (4) should meet:
Lower less than the 5 meters new-old concrete bond intersections of roadbed, it is thick that 1m is inwardly cut on old roadbed abrupt slope, excised by top layer loosened soil, during placement in layers, strengthens intersection and roll; When heavily ramming reinforcement, full rammer within the scope of intersection 3m.
Lower more than the 5 meters new-old concrete bond intersections of roadbed, longitudinal lap joint length is not less than 2m; Layering arranges and pedals and takes stubble, pedals wide 2m for every grade, pedals high 0.6m, towards the gradient 3% of old roadbed side, lays one deck 4m geo-grid for every grade, and the superior and the subordinate's grid vertically staggers 2m, and roadbed top spreads one deck 5m geo-grid.
Claims (7)
1., for the comprehensive debulking methods of Canal in Loess Area high-filled embankment, it is characterized in that,
The steps include:
(1) earthen foundation surface is clear shows 30cm and the 2m that backbreaks, and after backbreaking, soil matrix adopts tamping process lower floor ground, and effective treating depth is not less than 1m;
(2) compacting after thick 6% dirt of soil matrix elongated making 1m and compacting;
(3) after making dirt, plain native placement in layers compacting, every layer of filling-up thickness is not more than 300mm, and compacting adopts 18t vibratory roller to roll with the walking speed of 4km/h, and coefficient of consolidation is not less than 96%;
(4) often fill 3m and adopt tamping reinforcement one time;
(5) 1m place under plain earthen backfill to roadbed, backfills 6% dirt and compacting in 1m under roadbed;
If when meeting the process of new-old concrete bond boundary, step (3) and step (4) should meet:
Lower less than the 5 meters new-old concrete bond intersections of roadbed, it is thick that 1m is inwardly cut on old roadbed abrupt slope, excised by top layer loosened soil, during placement in layers, strengthens intersection and roll; When heavily ramming reinforcement, full rammer within the scope of intersection 3m;
Lower more than the 5 meters new-old concrete bond intersections of roadbed, longitudinal lap joint length is not less than 2m; Layering arranges and pedals and takes stubble, pedals wide 2m for every grade, pedals high 0.6m, towards the gradient 3% of old roadbed side, lays one deck 4m geo-grid for every grade, and the superior and the subordinate's grid vertically staggers 2m, and roadbed top spreads one deck 5m geo-grid.
2. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 1, is characterized in that,
Step of the present invention (3) plain soil fills in compacting process, after embankment district one laminin soil filler material loading completes, by the filling-up thickness of thickness 30cm, giant caterpillar formula bulldozer is adopted tentatively to shakeout, the edge that cannot arrive for machinery is manually levelling, and after tentatively shakeouing element soil filler on roll back and forth, complete preliminary consolidation; After every layer of preliminary consolidation completes, form road camber and form draining.
3. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 1 and 2, is characterized in that,
After step of the present invention (4) completes, if do not carry out step (5) at once, 200 ~ 300mm thick soil stratum need be reserved, excavate again during next step construction.
4. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 1 and 2, is characterized in that,
Step of the present invention (3) plain soil fills in compacting process, and roll width and must not be less than design width, what be convenient to later stage side slope cuts slope; And straightway when rolling by both sides to centre, sharp radius curve section is by Inside To Outside, and longitudinal advance and retreat formula is carried out, transverse joint overlap 0.4 ~ 0.5m, longitudinal rolling wheelmark overlap 0.4 ~ 0.5m, during vibratory roller first pressing adopt static pressure, after change vibratory compaction into.
5. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 4, is characterized in that,
The pass of step of the present invention (4) tamping is 3 times, and front is for twice ram by the spaced points of quincuncial arrangement, and last is all over being full rammer, and the number of ramming of same point is 5 to 6 to hit, and the last two average ramming volumes hit are less than 20mm.
6. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 5, is characterized in that,
Intermittent time between tamping twice is 3 ~ 7 days.
7. the comprehensive debulking methods for Canal in Loess Area high-filled embankment according to claim 6, is characterized in that, the rammer of the heavy tamping machine tool of tamping can be 500KN ﹒ m, and the heavy 5t of hammer ram, falls apart from 10m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410262497.4A CN103993533B (en) | 2014-06-13 | 2014-06-13 | For the comprehensive debulking methods of Canal in Loess Area high-filled embankment |
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| CN201410262497.4A CN103993533B (en) | 2014-06-13 | 2014-06-13 | For the comprehensive debulking methods of Canal in Loess Area high-filled embankment |
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| CN103993533A CN103993533A (en) | 2014-08-20 |
| CN103993533B true CN103993533B (en) | 2016-03-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064186A (en) * | 2015-08-07 | 2015-11-18 | 甘肃顺达路桥建设有限公司 | Rapid compacting method for loess subgrade |
| CN105484271A (en) * | 2015-11-27 | 2016-04-13 | 李军 | Filling method for high loess fill |
| CN106049211A (en) * | 2016-07-27 | 2016-10-26 | 西北大学 | Railway glass fiber ribbed loess roadbed and construction method thereof |
| CN110029652A (en) * | 2019-05-29 | 2019-07-19 | 中国十七冶集团有限公司 | A kind of construction technology reducing collapsible loess settlement after construction |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3653083B2 (en) * | 2003-01-23 | 2005-05-25 | 株式会社ダイヤコンサルタント | Road construction method |
| CN102051847A (en) * | 2010-12-16 | 2011-05-11 | 河南省新开元路桥工程咨询有限公司 | Method for treating collapsible loess foundation by dynamic compaction |
| CN102162237A (en) * | 2011-05-05 | 2011-08-24 | 西安建筑科技大学 | Vibration rolling and impact rolling combined construction method for compacting loess high filling body |
| CN102251512A (en) * | 2011-05-05 | 2011-11-23 | 西安建筑科技大学 | Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3653083B2 (en) * | 2003-01-23 | 2005-05-25 | 株式会社ダイヤコンサルタント | Road construction method |
| CN102051847A (en) * | 2010-12-16 | 2011-05-11 | 河南省新开元路桥工程咨询有限公司 | Method for treating collapsible loess foundation by dynamic compaction |
| CN102162237A (en) * | 2011-05-05 | 2011-08-24 | 西安建筑科技大学 | Vibration rolling and impact rolling combined construction method for compacting loess high filling body |
| CN102251512A (en) * | 2011-05-05 | 2011-11-23 | 西安建筑科技大学 | Construction method for compacting high loess-filled embankment by combining vibration roller compaction with dynamic compaction |
Non-Patent Citations (4)
| Title |
|---|
| 浅谈湿陷性黄土路基填筑综合补强施工技术;张旭刚;《科学之友》;20130215(第2期);正文第3-4节 * |
| 路基工程中高填方路基施工技术要求;温春兰;《今日科苑》;20080523(第10期);第1-2节 * |
| 高填方场地回填土施工质量控制;张海波;《山西建筑》;20140220;第40卷(第6期);第3.2节 * |
| 高速公路路基设计要点;刘洪辉;《青海交通科技》;20100628;正文第2节 * |
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