CN103015283A - Novel roadbed structure for phreatic high inland sulphate salty soil - Google Patents
Novel roadbed structure for phreatic high inland sulphate salty soil Download PDFInfo
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- CN103015283A CN103015283A CN201210584621XA CN201210584621A CN103015283A CN 103015283 A CN103015283 A CN 103015283A CN 201210584621X A CN201210584621X A CN 201210584621XA CN 201210584621 A CN201210584621 A CN 201210584621A CN 103015283 A CN103015283 A CN 103015283A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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Abstract
The invention discloses a novel roadbed structure for phreatic high inland sulphate salty soil. The structure sequentially comprises an embankment, a drainage device, a separating-discharging saline layer, a lower roadbed layer, an insulating separation layer and an upper roadbed layer from bottom to top. The drainage device and the separating-discharging saline layer are arranged above the phreatic line and below the salt expansion line. The separating-discharging saline layer is arranged in the embankment, wherein the lower bottom face is 30-50cm higher than the phreatic line. The drainage device is respectively arranged at the axle wire of the embankment and the embankment below the separating-discharging saline layer. The separating-discharging saline layers on both sides of the axle wire incline downward in the middle at 5-8 degrees. The lower roadbed layer is 30-50cm thick, the insulating separation layer is 30-50cm thick, and the upper roadbed layer is 20-30cm thick. According to the roadbed structure provided by the invention, the roadbed is dried and moderately wet to prevent heat and water of the lower roadbed from loss due to evaporation, so that the temperature change amplitude of the roadbed is reduced, the temperature of the roadbed is stable, saline transfer is reduced, the roadbed elevation height can be reduced, and the digging and filling amount for roadbed pavement can be reduced.
Description
Technical field
The present invention relates to a kind of Novel road based structures for the landlocked Restrain Method of Sulphate Salty soil of phreatic high.
Background technology
Salinized soil is the general name of salinization of soil soil in various degree.In highway engineering, refer generally in the 1.0m under the earth's surface soluble salt content in the soil on average greater than 0.3% soil.Salinized soil is divided into beach salty soil, landlocked saline soil and alluvial plain salinized soil by area distribution; Be divided into (Asia) chlorine saline soil, (Asia) Restrain Method of Sulphate Salty soil, carbonic acid salinized soil five classes by saliferous character.On the whole, the engineering disease of salinized soil comprises salt frost heave, molten fall into and to the corrosion of engineering body, material.Landlocked Restrain Method of Sulphate Salty soil be rich in the sulfate river, underground water flows to the depression from eminence, in typical case's arid, cross under the arid landlocked weather conditions through evaporation, salinity is enriched in the top layer and forms.Mainly be distributed in the hinterland such as Gansu, Qinghai, Xinjiang, the Inner Mongol.
Common salt is divided into sodium sulphate in the Restrain Method of Sulphate Salty soil, its dissolution characteristics: when 1. temperature was lower than 32.4 ℃, its solubility with temperature raise and increases; When surpassing 32.4 ℃, its solubility with temperature raises and reduces.2. saturated metabisulfite solution is separated out saltcake (Na with the temperature reduction when temperature is lower than 32.4 ℃
2SO
410H
2O) volume increases about 4 times, and when temperature was elevated to 32.4 ℃ again, the saltcake crystal lost the crystallization water and forms metabisulfite solution, volume-diminished.The landlocked arid of typical case, semiarid climate characteristics: annual precipitation is little, and year evaporation capacity is large; Summer, daytime temperature was high, and day and night temperature is large, and winter temperature is low.Comprehensive above 2 points, build in the highway in landlocked Restrain Method of Sulphate Salty soil district have salt-frost heave more, moltenly fall into, corrosion three class diseases, front two kinds of performances are particularly evident.The road of not taking measures reaches as high as 60 ℃ in the high temperature season surface temperature, under strong transpiration, saline groundwater is upwards migration in soil body space, but causes the salting liquid supersaturation to separate out sodium sulfate crystal because moisture constantly evaporates, and the enrichment of sulfate occurs.Change autumn, winter summer over to, temperature reduces transpiration and weakens, and separates out the saltcake crystal after the sodium sulphate dissolving again, and water build-up ice when temperature continued to descend, and both volume expansions cause road structure because being out of shape excessive formation bulging, crack.Spring temperature gos up, and rainfall is concentrated and occurred so that the saltcake crystal is dissolved in smaller volume in the pore water that the road surface bulging disappears, molten falling into appears in the place, crack, and under Cyclic Loading, road surface and road structure destroy constantly and enlarge.Go round and begin again, landlocked Restrain Method of Sulphate Salty soil district road does not reach service life, and maintenance cost is large repeatedly.
For above disease, being usually used at present phreatic high road structure processing mode is to raise the roadbed height or insulating course is set.Raise the roadbed height can controlling groundwater level at salt-below the frost heave line, road surface, roadbed bearing stratum but can cause the larger amount of fill of digging more than the capillary water influence basin, be not suitable for urban road construction, and may have a negative impact to surrounding enviroment; When underground water level raise, the height that originally designs might be not suitable with and cause salt frost heave, molten sunken generation.Insulating course is set can effectively cuts off the capillary water rising passway, prevent that salinity is enriched in base course and reduces the swollen generation of salt, when underground water level was higher, insulating course did not reach the partition effect.
Summary of the invention
The object of the invention provides a kind of for the phreatic high inland Restrain Method of Sulphate Salty soil Novel road based structures of groundwater level depth less than 3.0m.Can reduce range of temperature in the roadbed, cut off the salinity migration, discharge the salt solution in the roadbed, alleviate the engineering diseases such as road salt-frost heave and molten sunken destruction.
In order to achieve the above object, the present invention includes: be followed successively by from the bottom to top embankment, dewatering installation, every-the salt discharge water layer, lower roadbed layer, thermal insulation separation tomography and the bed of setting out on a journey, dewatering installation and be located at more than the phreatic line with below the swollen line of salt every the salt discharge water layer wherein, be located in the embankment every-salt discharge water layer, its bottom surface is higher than phreatic line 30-50cm, dewatering installation is arranged in roadbed axis and the embankment below the salt discharge water layer, the both sides, axis every-salt discharge water layer all to 5-8 ° of middle below inclination, lower roadbed layer thickness is 30-50cm, thermal insulation separation tomography thickness is 30-50cm, the thick 20-30cm of the bed of setting out on a journey.
As improvement, described is that the thick particle diameter of 30-60cm is the uniform sand gravel of 1-50mm grating or to adopt the thick particle diameter of two-layer loaded filter therebetween 20-30cm be the uniform sand gravel of 1-50mm grating every-salt discharge water layer.
As improvement, the material of described thermal insulation separation tomography be slag, slag, foamed plastics, styrene aerated plastics and concrete one or more.
As improvement, described dewatering installation is positioned at every-0.1～0.5m below the salt discharge water layer.
As improvement, described dewatering installation is gutter or gutter.
Road structure of the present invention is taked the earth roadbed partition salt discharge of Restrain Method of Sulphate Salty, insulation multiple defence line theory: 1. block underground capillary water rising path, and it is poor to form little water pressure at insulating course, (pipe) compiles and discharges roadbed to the gutter with capillary water, keeps roadbed drying, middle wet condition; 2. cut off down roadbed diffusion of heat, prevent that also lower roadbed heat and moisture run off because of evaporation, thereby reduce the roadbed temperature amplitude of variation, keep roadbed temperature stable, reduce the salinity migration; 3. reduce roadbed and raise height, dig when reducing the roadbed making, amount of fill.The present invention is applicable to the landlocked Restrain Method of Sulphate Salty soil of phreatic high district road foundation and builds, and also can be used for swollen, the molten engineerings such as serious interior regional road is newly-built, reconstruction that fall into of salt.
Description of drawings
Fig. 1 is the generalized section for the landlocked Restrain Method of Sulphate Salty soil of phreatic high Novel road based structures of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, the present invention is followed successively by embankment 1 from the bottom to top, dewatering installation 9, every salt discharge water layer 2, lower roadbed layer 5, thermal insulation separation tomography 6 and the bed 7 of setting out on a journey, wherein dewatering installation 9 and every-salt discharge water layer 2 be located at phreatic line more than 3 with the frost heave line below 4, be located in the embankment 1 every salt discharge water layer 2, dewatering installation 9 is arranged at the roadbed axis and in the embankment 1 of-salt discharge water layer 2 belows, the both sides, axis every-salt discharge water layer 2 all to 5-8 ° of middle below inclination, lower roadbed layer 5 thickness are 30-50cm, thermal insulation separation tomography 6 thickness are 30-50cm, the surface horizontal wall inscription is consistent with the pavement design value, and bed 7 thick 20-30cm set out on a journey.Described every-the salt discharge water layer is thick 30-60cm, particle diameter is the uniform sand gravel of 1-50mm grating or to adopt the thick particle diameter of two-layer loaded filter therebetween 20-30cm be the uniform sand gravel of 1-50mm grating.The material of described thermal insulation separation tomography be slag, slag, foamed plastics, styrene aerated plastics and concrete one or more combine.Described dewatering installation is positioned at every-0.1～0.5m below the salt discharge water layer and is positioned at underground water more than 3.Described dewatering installation 9 is gutter or gutter.
The present invention realizes as follows:
Embodiment 1:
(1) respectively adds 1m by design width of roadway both sides, remove the salt shell, the axis cutting depth subtracts 30cm as control take bury of groundwater, the basal surface that the inclination of two side direction axis below is 8 °, an amount of watering rolls under best aqueous conditions, makes it reach maximum degree of compaction.
(2) then downward excavated section 50 * 50 grooves at substrate axis place build high 30cm by laying bricks or stones, wide 30cm, thickness is the U-shaped cross section concrete ditch of 5cm or lays 30 * 30 prefabricated U-shaped pipes, longitudinal gradient is consistent with gradient incline and be not less than 1%, and both sides are backfilled to notch, cover gutter with porous disc.
(3) lay the anti-filter geotextile at substrate surface, then disposable shop 20cm, the uniform sand gravel of particle diameter 1-50mm grating and compacting, formation is tilted 8 ° to centre drain, and both sides to excavating the sideline, are then laid one deck anti-filter geotextile with the gravelly soil bound edge.
(4) by " highway subgrade design specifications " roadbed layer (JTG20D30-2004) and under " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 50cm;
(5) lay first thick 10cm, particle diameter 0.5mm-2mm sand topping, the surface horizontal wall inscription is consistent with the pavement design value, and smooth compacting re-lays thick 10cm, particle diameter 0.5mm-2mm sand topping after re-laying EPS (polystyrene foam) warming plate of thick 6-8cm;
(6) by " highway subgrade design specifications " (JTG20D30-2004) and " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 30cm bed of setting out on a journey.
Embodiment 2:
(1) respectively adds 1m by design width of roadway both sides, remove the salt shell, the axis cutting depth subtracts 30cm as control take bury of groundwater, the basal surface that the inclination of two side direction axis below is 7 °, an amount of watering rolls under best aqueous conditions, makes it reach maximum degree of compaction.
(2) then downward excavated section 50 * 50 grooves at substrate axis place build high 30cm by laying bricks or stones, wide 30cm, thickness is the U-shaped cross section concrete ditch of 5cm or lays 30 * 30 prefabricated U-shaped pipes, longitudinal gradient is consistent with gradient incline and be not less than 1%, and both sides are backfilled to notch, cover the gutter with porous disc.
(3) lay the anti-filter geotextile at substrate surface, then disposable shop 30cm, the uniform sand gravel of particle diameter 1-50mm grating and compacting forms to centre drain to tilt 7 °, and both sides to excavating the sideline, are then laid the anti-filter geotextile with the gravelly soil bound edge.
(4) by " highway subgrade design specifications " roadbed layer (JTG20D30-2004) and under " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 30cm;
(5) evenly lay the thick slag of 40cm or slag compacting as the thermal insulation separation tomography;
(6) by " highway subgrade design specifications " (JTG20D30-2004) and " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 30cm bed of setting out on a journey.
Embodiment 3:
(1) respectively adds 1m by design width of roadway both sides, remove the salt shell, the axis cutting depth subtracts 50cm as control take bury of groundwater, the basal surface that the inclination of two side direction axis below is 5 °, an amount of watering rolls under best aqueous conditions, makes it reach maximum degree of compaction.
(2) downward excavated section 50 * 50 grooves at substrate axis place, then build high 30cm by laying bricks or stones, wide 30cm, thickness is the U-shaped cross section concrete ditch of 5cm or lays 30 * 30 prefabricated U-shaped pipes, longitudinal gradient is consistent with gradient incline and be not less than 1%, both sides are backfilled to notch, cover gutter (pipe) with permeable every the sand plate.
(3) laying at twice gross thickness at substrate surface is 60cm, the uniform sand gravel of particle diameter 1-50mm grating and compacting, form to centre drain to tilt 5 °, both sides with the gravelly soil bound edge to excavating the sideline.
(4) by " highway subgrade design specifications " roadbed layer (JTG20D30-2004) and under " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 30cm;
(5) evenly lay the thick slag of 50cm or slag compacting as the thermal insulation separation tomography;
(6) by " highway subgrade design specifications " (JTG20D30-2004) and " saline soil area Road Design with construction guide " (Natural Division for Highway in Xinjiang Uygur Autonomous Region association) respective specified backfill 30cm bed of setting out on a journey.
Road structure of the present invention and the contrast of former road structure:
1. under thermal insulation separation faulting, the swollen degree of depth of roadbed salt reduces 10-50%, in the roadbed layer water content with seasonal variations without significant change, thereby the distortion on road surface is effectively controlled, prolong the service life of 2-3, reduced the during one's term of military service maintenance cost of 30-50% of original road.
2. in work progress, on the spot excavation and the backfill of salinized soil can reduce the amount of fetching earth of originally raising the roadbed scheme, and have reduced the height 1-2m of roadbed, lower cost of transportation and the obvious impact that reduces surrounding enviroment.
Claims (5)
1. Novel road based structures that is used for the landlocked Restrain Method of Sulphate Salty soil of phreatic high, it is characterized in that, comprise: be followed successively by from the bottom to top embankment, dewatering installation, every-the salt discharge water layer, lower roadbed layer, thermal insulation separation tomography and the bed of setting out on a journey, dewatering installation and be located at more than the phreatic line with below the swollen line of salt every the salt discharge water layer wherein, be located in the embankment every-salt discharge water layer, its bottom surface is higher than phreatic line 30-50cm, dewatering installation is arranged in roadbed axis and the embankment below the salt discharge water layer, the both sides, axis every-salt discharge water layer all to 5-8 ° of middle below inclination, lower roadbed layer thickness is 30-50cm, thermal insulation separation tomography thickness is 30-50cm, the thick 20-30cm of the bed of setting out on a journey.
2. according to claim 1 a kind of Novel road based structures for the landlocked Restrain Method of Sulphate Salty soil of phreatic high, it is characterized in that described is that the thick particle diameter of 30-60cm is the uniform sand gravel of 1-50mm grating or to adopt the thick particle diameter of two-layer loaded filter therebetween 20-30cm be the uniform sand gravel of 1-50mm grating every-salt discharge water layer.
3. according to claim 1 a kind of Novel road based structures for the landlocked Restrain Method of Sulphate Salty soil of phreatic high is characterized in that, the material of described thermal insulation separation tomography be slag, slag, foamed plastics, styrene aerated plastics and concrete one or more.
4. according to claim 1 a kind of Novel road based structures for the landlocked Restrain Method of Sulphate Salty soil of phreatic high is characterized in that, described dewatering installation is positioned at every-0.1～0.5m below the salt discharge water layer.
5. according to claim 1 a kind of Novel road based structures for the landlocked Restrain Method of Sulphate Salty soil of phreatic high is characterized in that described dewatering installation is gutter or gutter.
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| CN201210584621XA CN103015283A (en) | 2012-12-30 | 2012-12-30 | Novel roadbed structure for phreatic high inland sulphate salty soil |
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| CN201210584621XA CN103015283A (en) | 2012-12-30 | 2012-12-30 | Novel roadbed structure for phreatic high inland sulphate salty soil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243624A (en) * | 2013-05-14 | 2013-08-14 | 中铁二十一局集团第四工程有限公司 | Construction method for salty soil district railway roadbed with water content lower than liquid limit |
| CN104805745A (en) * | 2015-03-03 | 2015-07-29 | 宋金博 | Saline land roadbed laying method with environment protection effect |
| CN106894311A (en) * | 2015-12-18 | 2017-06-27 | 深圳海川新材料科技有限公司 | A kind of sponge-type urban water-through bituminous paving |
| CN106988179A (en) * | 2017-03-21 | 2017-07-28 | 中冶天工集团有限公司 | A kind of road structure for preventing salinized soil from corroding and its construction method |
| CN110195380A (en) * | 2019-05-17 | 2019-09-03 | 中铁二院工程集团有限责任公司 | Consider Ballast track coarse grain salt marsh dirt road embankment structure and construction method that violent temperature influences |
| CN111218862A (en) * | 2020-03-04 | 2020-06-02 | 中铁二院工程集团有限责任公司 | High-speed railway saline soil filler embankment structure and construction method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2160336C2 (en) * | 1999-03-01 | 2000-12-10 | Дальневосточный государственный университет путей сообщения | Earth road bed on permafrost base |
| CN101481899A (en) * | 2009-01-09 | 2009-07-15 | 中国科学院寒区旱区环境与工程研究所 | Use of heat pipe-block rubble slope protection cooling heat insulating composite roadbed in broad width road |
| CN102140771A (en) * | 2011-01-27 | 2011-08-03 | 河南省新开元路桥工程咨询有限公司 | Construction method for processing saline soil roadbed by separation layer |
-
2012
- 2012-12-30 CN CN201210584621XA patent/CN103015283A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2160336C2 (en) * | 1999-03-01 | 2000-12-10 | Дальневосточный государственный университет путей сообщения | Earth road bed on permafrost base |
| CN101481899A (en) * | 2009-01-09 | 2009-07-15 | 中国科学院寒区旱区环境与工程研究所 | Use of heat pipe-block rubble slope protection cooling heat insulating composite roadbed in broad width road |
| CN102140771A (en) * | 2011-01-27 | 2011-08-03 | 河南省新开元路桥工程咨询有限公司 | Construction method for processing saline soil roadbed by separation layer |
Non-Patent Citations (2)
| Title |
|---|
| 王生祖: "土中水基本特性与冻土盐渍土路基病因的分析及对策", 《青海交通科技》, no. 01, 28 February 2009 (2009-02-28) * |
| 薛明 等: "盐渍土路基盐分迁移防治与养护", 《公路交通科技》, no. 7, 15 July 2007 (2007-07-15) * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243624A (en) * | 2013-05-14 | 2013-08-14 | 中铁二十一局集团第四工程有限公司 | Construction method for salty soil district railway roadbed with water content lower than liquid limit |
| CN103243624B (en) * | 2013-05-14 | 2015-06-03 | 中铁二十一局集团第四工程有限公司 | Construction method for salty soil district railway roadbed with water content lower than liquid limit |
| CN104805745A (en) * | 2015-03-03 | 2015-07-29 | 宋金博 | Saline land roadbed laying method with environment protection effect |
| CN104805745B (en) * | 2015-03-03 | 2017-02-01 | 宋金博 | Saline land roadbed laying method with environment protection effect |
| CN106894311A (en) * | 2015-12-18 | 2017-06-27 | 深圳海川新材料科技有限公司 | A kind of sponge-type urban water-through bituminous paving |
| CN106988179A (en) * | 2017-03-21 | 2017-07-28 | 中冶天工集团有限公司 | A kind of road structure for preventing salinized soil from corroding and its construction method |
| CN110195380A (en) * | 2019-05-17 | 2019-09-03 | 中铁二院工程集团有限责任公司 | Consider Ballast track coarse grain salt marsh dirt road embankment structure and construction method that violent temperature influences |
| CN110195380B (en) * | 2019-05-17 | 2023-04-07 | 中铁二院工程集团有限责任公司 | Ballast track coarse-grained saline soil embankment structure considering severe air temperature influence and construction method |
| CN111218862A (en) * | 2020-03-04 | 2020-06-02 | 中铁二院工程集团有限责任公司 | High-speed railway saline soil filler embankment structure and construction method |
| CN111218862B (en) * | 2020-03-04 | 2024-06-18 | 中铁二院工程集团有限责任公司 | High-speed railway saline soil filler embankment structure and construction method |
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Application publication date: 20130403 |