CN102628247A - Insulation construction method for frozen-earth roadbed - Google Patents
Insulation construction method for frozen-earth roadbed Download PDFInfo
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- CN102628247A CN102628247A CN2012101232789A CN201210123278A CN102628247A CN 102628247 A CN102628247 A CN 102628247A CN 2012101232789 A CN2012101232789 A CN 2012101232789A CN 201210123278 A CN201210123278 A CN 201210123278A CN 102628247 A CN102628247 A CN 102628247A
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Abstract
The invention discloses an insulation construction method for a frozen-earth roadbed, which comprises the steps of: (1) carrying out excavating and replacing-filling construction; (2) laying a sand mattress layer, an insulation board, a geotextile and a geogrid; (3) burying temperature sensors; and (4) performing regular temperature observation. The insulation construction method for the frozen-earth roadbed relates to a construction method of setting a thermal insulation layer in a permafrost section, which is capable of controlling disturbance on a permafrost layer effectively, and maintaining property stability of the permafrost layer, thereby enhancing the overall stability of a roadbed, preventing the roadbed in the permafrost section from damages of subsidence, frost heave, pavement cracking, collapse, and the like, reducing replacing-filling thickness, saving construction cost, and shorting construction period under the same conditions.
Description
Technical field
The present invention relates to a kind of roadbed construction method, relate to a kind of frozen earth roadbed job practices specifically.
Background technology
At present; Qinghai-Tibet Platean in China; Large and small Xing'an Mountains, northeast and areas such as Tianshan Mountains, Altai Mountains owing to be located in ice box, have just formed special soil property---permafrost; Permafrost generally is divided into two-layer: top is the mobile layer (seasonal frozen ground) that Xia Rongdong freezes, and the bottom is the frozen crust for many years that does not melt all the year round.
In the cold plateau area road construction, run into the permafrost location through regular meeting.Permafrost how to guarantee the road foundation bottom is not destroyed (preventing to melt), guarantees that the stability of road foundation is the problem that road construction for a long time need solve.
Summary of the invention
In order to solve the problem that exists in the prior art, the present invention provides a kind of frozen earth roadbed heat insulating construction method, overcomes in the prior art in frozen soil location road construction roadbed problem of unstable.
Technical scheme of the present invention is following:
A kind of frozen earth roadbed heat insulating construction method may further comprise the steps:
(1) excavation changes and fills out construction
Excavate the following seasonal frozen ground of above-ground route, the placement in layers rubble, and carry out compacting with heavy road roller;
(2) laying of sand mattress layer, warming plate, geotextiles, GSZ
The seasonal frozen ground zone is changed and is filled out below rubble to the original ground absolute altitude, lays sand after leveling, the compacting and does mattress layer, re-lays the XPS insulating board, plate upper berth one deck geotextiles after smart the putting down;
After geotextiles was completed, the back was followed by continuing the filling roadbed underfill material of changing, and roadbed changes to be filled out the original ground place and lay horizontal GSZ; The both sides grid has upwards been bent overlapping; Carry out roadbed filling, grid has been bent partly and has been buried underground in the roadbed filling, and toe is provided with peat insulation corner protector;
(3) temperature pick up buries underground
Temperature pick up is buried underground by each frozen earth roadbed construction section, and frozen earth roadbed heat preservation construction falls every section and lays the ground temperature measurement point, lays the ground temperature measurement point respectively at roadbed central authorities and curb place;
(4) regular temperature observation
Observation highway section temperature stabilization is till 0 ℃ and temperature change up and down in ± 0.1 ℃ of scope.
Said step (1) roadbed changes fills out the employing section construction, fills out rubble with excavation with changing, and roll on backfill limit, limit.
It is grain composition rubble preferably that said step (2) roadbed changes underfill material.
Said step (3) temperature pick up is arranged on upper and lower each 1 of the roadbed XPS of central authorities plate, in curb excavation substrate and substrate, respectively settles 1.Said temperature pick up is attached to the pvc pipe outside in advance by laying degree of depth requirement, and the thermometric lead through in the pvc pipe, behind the selected thermometer hole position, is adopted rig boring, behind the pore-forming pvc pipe is put into the hole, backfill then, and backfill is closely knit as far as possible.Said temperature pick up is buried underground with frozen earth roadbed changing and is filled out cross-operation, and one section frozen earth roadbed changes and complete completely, and then confirms the burial place of temperature pick up, and pvc pipe etc. is placed in boring.
The regular temperature observation of said step (4) overlays one deck XPS insulating board again if not reaching temperature requirement then changes the first half of filling out with roadbed and excavate.
The invention has the beneficial effects as follows: frozen earth roadbed heat insulating construction method of the present invention, in the permafrost highway section, establish the job practices of isolation layer; Can control the disturbance to permanent freezing layer effectively, it is stable to make it property retention, and then has improved the resistance to overturning of roadbed; Avoid that depression, frost heave and pavement cracking appear in permafrost location roadbed, disease such as subside; Under condition, can reduce to change and fill out thickness, practice thrift construction cost and shorten the construction period.
Method of the present invention has been practiced thrift construction cost greatly, has responded the call of state guarantee environment and energy-saving and emission-reduction, can be good at protecting road ecological environment on the way, and social effect is very great.From frozen earth roadbed change to fill out set up the heat insulation technological improvement of insulating board; Through the integrated use of a series of advantage technologies, controlled permafrost stability, thereby guaranteed the resistance to overturning of roadbed; Prolong the application life of road, greatly reduced the expense of road later maintenance.
The inventive method can be used in the road foundation construction of extremely frigid zones, can also use for reference in the fields such as construction foundation working insulation of extremely frigid zones and apply in a flexible way.
Description of drawings
Fig. 1 is the frozen earth roadbed heat preservation construction cross-sectional drawing of the present invention;
Wherein 1-temperature pick up 2-road surface structare layer 3-roadbed is central
4-original ground absolute altitude 5-quarry run rockfill layer 6-XPS insulating board 7-GSZ
8-peat insulation corner protector
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail.
The construction principle:
Each item regulation of " highway bridge and culvert construction technique normalizing ", " road quality check evaluation criterion " and design document that the construction of frozen earth roadbed heat preservation construction technology is carried out.
Be standard at first, on the basis of abundant combination actual conditions, economize on the use of funds and the duration, formulate the constructure scheme of science, note guaranteeing engineering construction safety according to ensuring the quality of products, taking into account with technical specification and design document.
Fully carry out preparation of construction before the construction: collect weather information and geologic prospect report data and subgrade Design data, confirm frozen earth roadbed scope; Carry out the repetition measurement of roadbed pile No. and draw survey work, guarantee to measure accurate; Be equipped with enough plant equipment and roadbeds according to programming and change underfill material and heat insulating material, carry out raw-material reinspection work; Construction equipment, test detecting equipment, materials needed are complete, and each item technical data, measure are told somebody what one's real intentions are, and the building site person in charge put in place.
Job practices:
Frozen earth roadbed heat insulating construction method technological process:
Frozen earth roadbedly excavate frozen soil layer → layering and change and fill out rubble → laying sand mattress layer → laying XPS insulating board and lay geotextiles → fill out rubble to original ground absolute altitude → layings GSZ → roadbed basic unit construction in layer → asphalt concrete pavement to construct
Concrete job practices is following:
1. the excavation roadway excavation is changed and is filled out construction
Excavate the following 3m deep seasonal frozen ground of above-ground route (supposition original ground absolute altitude for ± 0.00), the placement in layers rubble, and carry out compacting with heavy road roller layering.For effectively control is to the disturbance of permafrost, roadbed changes fills out the employing section construction, fills out rubble with excavation with changing, and the form of construction work that roll on backfill limit, limit is carried out.
2. the laying of sand mattress layer, insulating board, geotextiles, GSZ
Frozen soil changes when filling out rubble to original ground absolute altitude 4 following 30cm places (during the 0.3m place); After leveling, the compacting; On quarry run rockfill face 5, lay the thick sand of 5cm and do mattress layer (protection insulating board); Begin to lay the thick XPS insulating board 6 of 5cm above that after sand mattress layer essence is flat, fixing between the insulating board with the iron wire connection, in insulating board 6 upper berth one deck geotextiles XPS insulating board 6 is protected then.
After geotextiles is completed; The back is followed by continuing the filling roadbed underfill material (rubble that particle is less) of changing, and roadbed changes when filling out before the excavation original ground absolute altitude 4 (± 0.00), lays horizontal GSZ at this absolute altitude place 7 one; The both sides grid has upwards been bent overlapping 200cm; Carry out roadbed filling again, grid has been bent partly and has been buried underground in the roadbed filling, and toe is provided with peat insulation corner protector 8.
3. temperature pick up buries underground
Temperature pick up is buried underground by each frozen earth roadbed construction section, and frozen earth roadbed heat preservation construction falls every section and lays 2 ground temperature measurement points, lays respectively to be roadbed central authorities and curb place; It is upper and lower that temperature pick up 1 is placed in the roadbed 3XPS of central authorities insulating board respectively, and the 1.5m place settles 1 temperature pick up 1 respectively in curb excavation substrate and substrate.
Temperature pick up is attached to outside the pvc pipe by laying the degree of depth requirements in advance, with the thermometric lead through in the pvc pipe.Behind the selected thermometer hole position, adopt rig boring, behind the pore-forming pvc pipe is put into the hole, backfill then, backfill is closely knit as far as possible.
Temperature pick up is buried underground with frozen earth roadbed changing and is filled out cross-operation, and one section frozen earth roadbed changes and complete completely, and then confirms the burial place of temperature pick up, and pvc pipe etc. is placed in boring.
4. regular temperature observation
Observe once Continuous Observation two months weekly.Observation highway section temperature stabilization is till 0 ℃ and temperature change up and down in ± 0.1 ℃ of scope.Then roadbed is not changed the first half of filling out and excavate if reach temperature requirement after two months, strengthen effect of heat insulation overlaying the thick XPS insulating board of one deck 5cm again apart from substrate 1.5m place, to guarantee that the temperature of permafrost tends towards stability bottom the roadbed.
5. each layer of roadbed and road surface
Up partly fill from GSZ, be followed successively by from bottom to top: 20cm graded gravel bed course, 32cm cement Stability Gravel subbase, 20cm cement stabilized macadam base for roadbed.
Although the present invention has been carried out foregoing description in conjunction with accompanying drawing; But the present invention is not limited to the above-mentioned specific embodiment, and the above-mentioned specific embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Under the situation that does not break away from aim of the present invention and claim institute protection domain, can also make a lot of distortion, these all belong to the row of protection of the present invention.
Claims (7)
1. a frozen earth roadbed heat insulating construction method is characterized in that, may further comprise the steps:
(1) excavation changes and fills out construction
Excavate the following seasonal frozen ground of above-ground route, the placement in layers rubble, and carry out compacting with heavy road roller;
(2) laying of sand mattress layer, warming plate, geotextiles, GSZ
Frozen soil changes to be filled out below rubble to the original ground absolute altitude, lays sand after leveling, the compacting and does mattress layer, re-lays the XPS insulating board, plate upper berth one deck geotextiles after smart the putting down;
After geotextiles was completed, the back was followed by continuing the filling roadbed underfill material of changing, and roadbed changes to be filled out the original ground place and lay horizontal GSZ; The both sides grid has upwards been bent overlapping; Carry out roadbed filling, grid has been bent partly and has been buried underground in the roadbed filling, and toe is provided with peat insulation corner protector;
(3) temperature pick up buries underground
Temperature pick up is buried underground by each frozen earth roadbed construction section, and frozen earth roadbed heat preservation construction falls every section and lays the ground temperature measurement point, lays the ground temperature measurement point respectively at roadbed central authorities and curb place;
(4) regular temperature observation
Observation highway section temperature stabilization is till 0 ℃ and temperature change up and down in ± 0.1 ℃ of scope.
2. according to the said frozen earth roadbed heat insulating construction method of claim 1, it is characterized in that said step (1) roadbed changes fills out the employing section construction, fill out rubble with excavation with changing, roll on backfill limit, limit.
3. according to the said frozen earth roadbed heat insulating construction method of claim 1, it is characterized in that it is grating rubble preferably that said step (2) roadbed changes underfill material.
4. according to the said frozen earth roadbed heat insulating construction method of claim 1, it is characterized in that said step (3) temperature pick up is arranged on upper and lower each 1 of the roadbed XPS of central authorities plate, in curb excavation substrate and substrate, respectively settles 1.
5. according to the said frozen earth roadbed heat insulating construction method of claim 4, it is characterized in that said temperature pick up is attached to the pvc pipe outside in advance by laying degree of depth requirement; With the thermometric lead through in the pvc pipe; Behind the selected thermometer hole position, adopt rig boring, behind the pore-forming pvc pipe is put into the hole; Backfill then, backfill is closely knit as far as possible.
6. according to the said frozen earth roadbed heat insulating construction method of claim 4, it is characterized in that said temperature pick up is buried underground with frozen earth roadbed changing and filled out cross-operation; One section frozen earth roadbed change complete complete; And then confirm the burial place of temperature pick up, pvc pipe is placed in boring.
7. according to the said frozen earth roadbed heat insulating construction method of claim 1, it is characterized in that the regular temperature observation of said step (4) overlays one deck XPS insulating board again if not reaching temperature requirement then changes the first half of filling out with roadbed and excavate.
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| CN2012101232789A CN102628247A (en) | 2012-04-24 | 2012-04-24 | Insulation construction method for frozen-earth roadbed |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817298A (en) * | 2012-08-29 | 2012-12-12 | 中铁十五局集团有限公司 | Construction method on permafrost |
| CN103572681A (en) * | 2013-08-14 | 2014-02-12 | 中国科学院寒区旱区环境与工程研究所 | Thermal insulation permeable roadbed structure |
| CN103696338A (en) * | 2013-12-09 | 2014-04-02 | 中国十七冶集团有限公司 | Permafrost region road hollow-layer heat-preserving protection-foot composite roadbed |
| CN105256683A (en) * | 2015-09-10 | 2016-01-20 | 东南大学 | Permafrost region roadbed thermal insulation construction method |
| CN105421178A (en) * | 2015-12-18 | 2016-03-23 | 江苏兆通工程技术有限公司 | Heating-layer pavement for cold region and construction technology thereof |
| CN105926395A (en) * | 2016-06-22 | 2016-09-07 | 山西省交通科学研究院 | Roadbed structure capable of eliminating consolidation settlement of newly-built roadbed and construction method of roadbed structure |
| CN106149507A (en) * | 2016-08-22 | 2016-11-23 | 詹珂君 | Road damping water proof intelligent monitoring rubber cushion |
| CN107024425A (en) * | 2017-04-20 | 2017-08-08 | 哈尔滨工业大学 | Cold area's roadbed freeze thawing monitoring system and its implementation |
| CN108118571A (en) * | 2018-01-26 | 2018-06-05 | 四川农业大学 | Suitable for the direct drawing-in type active aeration-cooling device of subgrade in permafrost soil zone |
| CN108265735A (en) * | 2018-02-05 | 2018-07-10 | 龙建路桥股份有限公司 | High latitude High Temperature Permafrost area highway raft plate-pile composite foundation and process for constructing |
| CN109440562A (en) * | 2018-12-05 | 2019-03-08 | 交通运输部科学研究院 | A kind of bubble composite soil roadbed and its construction technology suitable for Frozen Ground Area |
| CN111021175A (en) * | 2020-01-19 | 2020-04-17 | 马建生 | Construction method of heat-preservation roadbed |
| CN111560799A (en) * | 2019-11-18 | 2020-08-21 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed heat insulation structure in frozen soil area, construction method and application |
| CN111945485A (en) * | 2020-08-12 | 2020-11-17 | 中铁八局集团第二工程有限公司 | High-speed railway roadbed with vibration damping and freezing prevention functions |
| CN114855563A (en) * | 2022-06-09 | 2022-08-05 | 保利长大工程有限公司 | Slip form construction method of auxiliary concrete member |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817298A (en) * | 2012-08-29 | 2012-12-12 | 中铁十五局集团有限公司 | Construction method on permafrost |
| CN102817298B (en) * | 2012-08-29 | 2014-12-10 | 中铁十五局集团有限公司 | Construction method on permafrost |
| CN103572681A (en) * | 2013-08-14 | 2014-02-12 | 中国科学院寒区旱区环境与工程研究所 | Thermal insulation permeable roadbed structure |
| CN103696338A (en) * | 2013-12-09 | 2014-04-02 | 中国十七冶集团有限公司 | Permafrost region road hollow-layer heat-preserving protection-foot composite roadbed |
| CN105256683B (en) * | 2015-09-10 | 2017-05-03 | 东南大学 | Permafrost region roadbed thermal insulation construction method |
| CN105256683A (en) * | 2015-09-10 | 2016-01-20 | 东南大学 | Permafrost region roadbed thermal insulation construction method |
| CN105421178A (en) * | 2015-12-18 | 2016-03-23 | 江苏兆通工程技术有限公司 | Heating-layer pavement for cold region and construction technology thereof |
| CN105926395A (en) * | 2016-06-22 | 2016-09-07 | 山西省交通科学研究院 | Roadbed structure capable of eliminating consolidation settlement of newly-built roadbed and construction method of roadbed structure |
| CN105926395B (en) * | 2016-06-22 | 2018-01-02 | 山西省交通科学研究院 | A kind of road structure and construction method for eliminating newly-built roadbed consolidation settlement |
| CN106149507B (en) * | 2016-08-22 | 2018-10-16 | 詹珂君 | Road damping water proof intelligent monitoring rubber cushion |
| CN106149507A (en) * | 2016-08-22 | 2016-11-23 | 詹珂君 | Road damping water proof intelligent monitoring rubber cushion |
| CN107024425A (en) * | 2017-04-20 | 2017-08-08 | 哈尔滨工业大学 | Cold area's roadbed freeze thawing monitoring system and its implementation |
| CN108118571A (en) * | 2018-01-26 | 2018-06-05 | 四川农业大学 | Suitable for the direct drawing-in type active aeration-cooling device of subgrade in permafrost soil zone |
| CN108265735A (en) * | 2018-02-05 | 2018-07-10 | 龙建路桥股份有限公司 | High latitude High Temperature Permafrost area highway raft plate-pile composite foundation and process for constructing |
| CN109440562A (en) * | 2018-12-05 | 2019-03-08 | 交通运输部科学研究院 | A kind of bubble composite soil roadbed and its construction technology suitable for Frozen Ground Area |
| CN111560799A (en) * | 2019-11-18 | 2020-08-21 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed heat insulation structure in frozen soil area, construction method and application |
| CN111021175A (en) * | 2020-01-19 | 2020-04-17 | 马建生 | Construction method of heat-preservation roadbed |
| CN111945485A (en) * | 2020-08-12 | 2020-11-17 | 中铁八局集团第二工程有限公司 | High-speed railway roadbed with vibration damping and freezing prevention functions |
| CN114855563A (en) * | 2022-06-09 | 2022-08-05 | 保利长大工程有限公司 | Slip form construction method of auxiliary concrete member |
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Application publication date: 20120808 |