CN101967785A - High-grade highway structure of soaked sand dredger filling embankment in coastal region - Google Patents
High-grade highway structure of soaked sand dredger filling embankment in coastal region Download PDFInfo
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- CN101967785A CN101967785A CN 201010285990 CN201010285990A CN101967785A CN 101967785 A CN101967785 A CN 101967785A CN 201010285990 CN201010285990 CN 201010285990 CN 201010285990 A CN201010285990 A CN 201010285990A CN 101967785 A CN101967785 A CN 101967785A
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Abstract
The invention relates to a high-grade highway structure of a soaked sand dredger filling embankment in a coastal region, relating to an embankment pavement structure of a novel highway. The highway structure comprises a bagged sand cofferdam (1), an anti-leakage protection layer (8) outside the cofferdam (1), dredger filled sand (3) in the cofferdam, a pile base (2) in the dredger filled sand, a crushed rock layer (4), a cement-straightening gravel layer (6) and an asphalt cement layer (7) and is characterized in that a solidified cement layer is paved between the crushed rock layer (4) and the cement-straightening gravel layer (6), the crushed rock layer (4) has the thickness of 20-80 cm, the solidified cement layer with the thickness of 40-80 cm is paved at the top of the crushed rock layer (4), the cement-straightening gravel layer with the thickness of 30-60 cm is arranged on the solidified cement layer, and the total thickness of the three layers is 100-160 cm. According to the invention, great mounts of dredger filled sand and silt abundant in the coastal region are used as building materials for roadbeds and embankments and substitute a great amount of crushed rock needing long-distance transportation and having higher cost so as to decrease the construction cost and improve the comprehensive road performance; and the direct investment of the road construction is reduced by 20-40 percent by substituting partial cement for stabilizing gravels.
Description
Technical field
Patent of the present invention relates to the road structure of novel road, the high-grade highway that especially a kind of coastal region that is applicable to that usefulness coastal region resource is built as the roadbed roadbed material than the hydraulic fill sand and the mud of horn of plenty soaks.
Background technology
China has utilized the method for hydraulic fill sand to form a large amount of reclaiming land around sea engineerings, for example Tangshan Cao Feidian will become at present the engineering of reclaiming fields from the sea of monomer hydraulic reclamation area maximum in the world, have an area of 310 square kilometres land-based area by enclosing extra large hydraulic reclamation formation the most at last to industrial occupancy, the year two thousand twenty prince wife Cao pasture.Highway construction is of paramount importance infrastructure in above-mentioned reclaiming land around sea engineering, and its economy, durability and practicality are the keys of restriction whole distract development.Many highways are to build in the coastal waters in the reclaiming land around sea engineering at present, and embankment is immersed in the seawater.Natural conditions on every side are harsh challenges for the workmanship of highway, show following some: wash away and the fluctuation meeting of tidal level of seawater produce great detrimental effect to the stability and the safety of embankment; The subgrade soils of a large amount of high-moistures, high void ratio, high salinity, high organic, the low degree of consolidation needs to handle; The aggressivity villaumite becomes branch that highway and appendicular durability are caused remarkable harm with sulfate etc.; The shortage of road materials can significantly increase engineering cost and cycle again on the way.Therefore solve above-mentioned key issue, for the high-quality of realizing highway, high-durability, high-speed, low-cost significant.
In above-mentioned highway construction project, the roadbed roadbed material generally adopts the mountain skin stone of outward transport or mountain skin soil to replace and fill, though can improve the stability and the corrosion resistance of roadbed greatly, but because the mountain skin stone or the mountain skin soil resource scarcity of coastal region, need ship from far mountain area, therefore cost height, cycle are long, can not satisfy the engineering instructions for use.Therefore also have in the engineering and gather materials on the spot, use a large amount of hydraulic fill sand as roadbed filling, but its road is subjected to seawater influence bigger with engineering properties, less stable, therefore, carry out the high-grade highway structure design of scientific and reasonable coastal region immersion hydraulic fill sand roadbed, for design, construction and the significant and value of long-term operation security of the novel highway structure of this kind.
Summary of the invention
The invention provides that a kind of cost is low, easy construction, can utilize the novel high-grade highway form of structure of coastal region hydraulic fill sand and mud resource in a large number, this highway is applicable to that blast is filling roadbed in the shallow sea.
The high-grade highway structure of coastal region immersion hydraulic fill sand roadbed, comprise the antiseepage topping 8 of packed sand cofferdam 1, outside, cofferdam, hydraulic fill sand 3, the pile foundation 2 in the hydraulic fill sand, mountain skin stone layer 4, cement stabilized macadam layer 6 and the asphalt concrete layer 7 of inside, cofferdam, it is characterized in that: lay between mountain skin stone layer 4 and the cement stabilized macadam layer 6 and solidify dirty sand; And mountain skin stone layer thickness is 20～80cm, and the thick curing dirty sand of 40～80cm is laid at skin stone layer top, mountain, and solidifying above the dirty sand is 30～60cm cement stabilized macadam layer, and this gross thickness of three layers is 100～160cm.
Described curing dirty sand is mixed seashore mud and is added special inorganic class curing compound by hydraulic fill sand and forms, and wherein: hydraulic fill sand and seashore mud are 3/7～4/6 to mix by mass ratio, and the mass ratio of special inorganic class curing compound and silt particle mixture is 1/20～1/10; Hydraulic fill sand is native state, and maximum particle diameter is less than 0.5mm, and mud content is by mass percentage less than 10%; Seashore mud, nature, high-moisture, between 50～70%, liquid limit 40～45%, plastic limit 10～15% belongs to stream and moulds state; Described percentage all by mass percentage.
The road structure form overall plan of patent design of the present invention is: the first step adopts packed sand cofferdam bank protection, outside antiseepage geotextiles, mold-bagged concrete and the levee toe stone bank protection of adopting in cofferdam; Second step filled with hydraulic fill sand in inside, cofferdam; The 3rd step smashed pile foundations such as stone mar or high-pressure rotary jet grouting pile and reinforces in hydraulic fill sand; Geo-grid is laid in the smooth back of the top compacting of the 4th step pile foundation reinforcement hydraulic fill sand; Lay the thick mountain of 20～80cm skin stone on the 5th step geo-grid; Lay hydraulic fill sand and sludge solidification layer that the thick curing compound of 40～80cm is handled above after the 6th step mountain skin stone compacting; The 7th step was solidified the thick cement stabilized macadam layer of dirty sand upper berth 30～60cm; Lay the asphalt concrete layer that adheres to specification above the 8th step cement stabilized macadam layer.The road structure integral form as shown in Figure 1.
Advantage of the present invention is: 1) can utilize abundant hydraulic fill sand of coastal region and mud as roadbed and roadbed construction material in a large number, a large amount of substituting needs mountain skin stone long-distance transport, that cost is higher, reduces construction costs and improves comprehensive pavement performance.2) can substitute the part cement stabilized macadam, make the road construction work direct investment reduce 20%～40%.
Description of drawings
Fig. 1 road structure integral form
The packed sand of 1-cofferdam; The 2-pile foundation; The 3-hydraulic fill sand; 4-mountain skin stone layer; 5-solidifies dirty sand;
6-cement stabilized macadam layer; The 7-asphalt concrete layer; 8-antiseepage topping
The specific embodiment:
Concrete technical characterictic is as follows:
1. constitute by the antiseepage topping 8 of packed sand cofferdam 1, outside, cofferdam, the hydraulic fill sand 3 of inside, cofferdam, pile foundation 2, mountain skin stone layer 4, curing dirty sand 5, cement stabilized macadam layer 6 and the asphalt concrete layer 7 in the hydraulic fill sand.
2. build in the roadbed both sides in packed sand cofferdam 1, waterproof and dampproof measures 8 such as cofferdam outside employing antiseepage geotextiles, mold-bagged concrete and levee toe stone bank protection.
3. the cofferdam height is designated as down the roadbed end face; The inner hydraulic fill sand 3 that adopts in cofferdam, hydraulic fill sand requires maximum particle diameter less than 0.5mm, and mud content is not more than 10%, equates with the cofferdam height after the hydraulic fill sand height compacting sedimentation or is not less than 0.5 meter of cofferdam height.
4. carry out pile foundation 2 constructions after the hydraulic fill sand compacting, the pile foundation degree of depth requires to penetrate the bearing layer that hydraulic fill sand reaches the sea bed bottom.
5. shop thickness is 20～80cm mountain skin stone layer 4 above the geo-grid, and mountain skin stone top layer is laid the thick curing dirty sand 5 of 40～80cm, and wherein hydraulic fill sand and mud are 3/7～4/6 to mix by mass ratio, and the mass ratio of curing compound and silt particle mixture is 1/20～1/10.Curing compound can be selected special inorganic class curing compound for use, requires 7 days unconfined compression strengths of solidified earth to be greater than 1.0MPa.Per 20～30cm curing silt particle is one deck in the process of deployment, compaction in layers, and every layer degree of compaction is greater than 96%, and deflection value requires less than 90 (0.01mm).
6. mountain skin stone layer, curing dirty sand and cement stabilized macadam layer gross thickness are 100～160cm.
7. lay cement stabilized macadam layer 6 and bituminous mixture layer 7 above the curing dirty sand, its thickness and other physical and mechanical property meet design requirement and get final product.
1. shop thickness is 30cm mountain skin stone layer above the base course geo-grid, and 60cm curing dirty sand is laid at Pi Shi top, mountain, and top again is 40cm cement stabilized macadam layer.Wherein solidify dirty sand, the silt particle mixed proportion is 3: 7, and the Te Saite curing compound that curing compound selects for use the honorable Science and Technology Ltd. of overflowing in Beijing to produce, volume are 6% (curing compound and silt particle mixture quality ratio), solidify compacting behind per 20 centimetres of pine shop one decks in the dirty sand process of deployment, divide 3 layers of laying.Check and acceptance result shows: 7 days unconfined compression strengths of solidifying dirty sand are 1.7MPa, degree of compaction difference 97%, 98%, 98%. pavement deflection values are 88 (0.01mm), on-the-spot bearing ratio is 40%, and the modulus of resilience is 820MPa, all satisfies the speedway code requirement far away.
2. shop thickness is 20cm mountain skin stone layer above the base course geo-grid, and 80cm curing dirty sand is laid at Pi Shi top, mountain, and top again is 60cm cement stabilized macadam layer.Wherein solidify dirty sand, the silt particle mixed proportion is 4: 6, curing compound is selected the solid native agent of HAS type for use, and volume is 5% (curing compound and silt particle mixture quality ratio), solidifies compacting behind per 20 centimetres of pine shop one decks in the dirty sand process of deployment, divide 4 layers of laying, check and acceptance result shows: 7 days unconfined compression strengths of solidifying dirty sand are 1.9MPa, degree of compaction difference 97%, 97%, 98%, 98%.The pavement deflection value is 83 (0.01mm), and on-the-spot bearing ratio is 38%, and the modulus of resilience is 790MPa, all satisfies the speedway code requirement far away.
3. shop thickness is 60cm mountain skin stone layer above the base course geo-grid, and 50cm curing dirty sand is laid at Pi Shi top, mountain, and top again is 50cm cement stabilized macadam layer.Wherein solidify dirty sand, the silt particle mixed proportion is 4: 6, curing compound is selected HS type soil body curing compound for use, volume is 8% (curing compound and silt particle mixture quality ratio), solidify compacting behind per 25 centimetres of pine shop one decks in the dirty sand process of deployment, divide 2 layers of laying, check and acceptance result shows: 7 days unconfined compression strengths of solidifying dirty sand are 1.6MPa, degree of compaction difference 97%, 98%.The pavement deflection value is 86 (0.01mm), and on-the-spot bearing ratio is 42%, and the modulus of resilience is 1025MPa, all satisfies the speedway code requirement far away.
4. shop thickness is 80cm mountain skin stone layer above the base course geo-grid, and 40cm curing dirty sand is laid at Pi Shi top, mountain, and top again is 30cm cement stabilized macadam layer.Wherein solidify dirty sand, the silt particle mixed proportion is 5: 5, curing compound is selected the NEW TYPE OF COMPOSITE clay hardening agent-NCS curing compound of Research Institute of Highway, Ministry of Communications's development for use, volume is 10% (curing compound and silt particle mixture quality ratio), solidify compacting behind per 20 centimetres of pine shop one decks in the dirty sand process of deployment, divide 2 layers of laying, check and acceptance result shows: 7 days unconfined compression strengths of solidifying dirty sand are 1.3MPa, degree of compaction difference 98%, 98%.The pavement deflection value is 80 (0.01mm), and on-the-spot bearing ratio is 36%, and the modulus of resilience is 806MPa, all satisfies the speedway code requirement far away.
5. shop thickness is 30cm mountain skin stone layer above the base course geo-grid, and 40cm curing dirty sand is laid at Pi Shi top, mountain, and top again is 30cm cement stabilized macadam layer.Wherein solidify dirty sand, the silt particle mixed proportion is 4: 6, curing compound is selected Beijing special Saite curing compound difficult to understand for use, volume is 7% (curing compound and silt particle mixture quality ratio), solidify compacting behind per 20 centimetres of pine shop one decks in the dirty sand process of deployment, divide 2 layers of laying, check and acceptance result shows: 7 days unconfined compression strengths of solidifying dirty sand are 1.2MPa, degree of compaction difference 99%, 98%.The pavement deflection value is 85 (0.01mm), and on-the-spot bearing ratio is 35%, and the modulus of resilience is 800MPa, all satisfies the speedway code requirement far away.
Claims (2)
1. the high-grade highway structure of coastal region immersion hydraulic fill sand roadbed, comprise the antiseepage topping (8) of packed sand cofferdam (1), outside, cofferdam, hydraulic fill sand (3), the pile foundation (2) in the hydraulic fill sand, mountain skin stone layer (4), cement stabilized macadam layer (6) and the asphalt concrete layer (7) of inside, cofferdam, it is characterized in that: lay between mountain skin stone layer (4) and the cement stabilized macadam layer (6) and solidify dirty sand; And mountain skin stone layer thickness is 20～80cm, and the thick curing dirty sand of 40～80cm is laid at skin stone layer top, mountain, and solidifying above the dirty sand is 30～60cm cement stabilized macadam layer, and this gross thickness of three layers is 100～160cm.
2. the high-grade highway structure of coastal region immersion hydraulic fill sand roadbed according to claim 1, it is characterized in that described curing dirty sand is mixed seashore mud and added special inorganic class curing compound by hydraulic fill sand forms, wherein: hydraulic fill sand and seashore mud are 3/7～4/6 to mix by mass ratio, and the mass ratio of special inorganic class curing compound and silt particle mixture is 1/20～1/10; Hydraulic fill sand is native state, and maximum particle diameter is less than 0.5mm, and mud content is by mass percentage less than 10%; Seashore mud, nature, water content between 50～70%, liquid limit 40～45%, plastic limit 10～15% belongs to stream and moulds state; Described percentage all by mass percentage.
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| CN 201010285990 CN101967785A (en) | 2010-09-17 | 2010-09-17 | High-grade highway structure of soaked sand dredger filling embankment in coastal region |
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| CN 201010285990 CN101967785A (en) | 2010-09-17 | 2010-09-17 | High-grade highway structure of soaked sand dredger filling embankment in coastal region |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831688A (en) * | 2015-05-14 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Method for cofferdam construction |
| CN106544939A (en) * | 2016-09-27 | 2017-03-29 | 中铁五局集团有限公司 | A kind of steady underlayment of water, base layer construction craft |
| CN107938456A (en) * | 2017-11-29 | 2018-04-20 | 宁波衡华园林建设有限公司 | Fill out river road construction method |
| CN108951334A (en) * | 2016-11-21 | 2018-12-07 | 康颖 | A kind of construction method of road foundation structure |
| CN109355990A (en) * | 2018-11-29 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Low-level bog area hydraulic reclamation ultra fine sand road structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08151602A (en) * | 1994-11-26 | 1996-06-11 | Takeo Inaba | Road construction at boundary between structure and filling |
| WO2007042338A1 (en) * | 2005-10-12 | 2007-04-19 | Inversiones Yuste S.A. | Improved concrete pavement slabs for streets, roads or highways and the methodology for the slab design |
| JP2008101463A (en) * | 2008-01-15 | 2008-05-01 | Mitsui Chemicals Polyurethanes Inc | Base material waterproof construction method, structure by this construction method and primer for adhesive layer used for this construction method |
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2010
- 2010-09-17 CN CN 201010285990 patent/CN101967785A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08151602A (en) * | 1994-11-26 | 1996-06-11 | Takeo Inaba | Road construction at boundary between structure and filling |
| WO2007042338A1 (en) * | 2005-10-12 | 2007-04-19 | Inversiones Yuste S.A. | Improved concrete pavement slabs for streets, roads or highways and the methodology for the slab design |
| JP2008101463A (en) * | 2008-01-15 | 2008-05-01 | Mitsui Chemicals Polyurethanes Inc | Base material waterproof construction method, structure by this construction method and primer for adhesive layer used for this construction method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831688A (en) * | 2015-05-14 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Method for cofferdam construction |
| CN106544939A (en) * | 2016-09-27 | 2017-03-29 | 中铁五局集团有限公司 | A kind of steady underlayment of water, base layer construction craft |
| CN108951334A (en) * | 2016-11-21 | 2018-12-07 | 康颖 | A kind of construction method of road foundation structure |
| CN108951334B (en) * | 2016-11-21 | 2020-12-08 | 惠州大亚湾市政基础设施有限公司 | Construction method of road subgrade structure |
| CN107938456A (en) * | 2017-11-29 | 2018-04-20 | 宁波衡华园林建设有限公司 | Fill out river road construction method |
| CN107938456B (en) * | 2017-11-29 | 2020-10-09 | 宁波衡华园林建设有限公司 | Construction method for filling river channel |
| CN109355990A (en) * | 2018-11-29 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Low-level bog area hydraulic reclamation ultra fine sand road structure |
| CN109355990B (en) * | 2018-11-29 | 2023-09-19 | 中国电建集团成都勘测设计研究院有限公司 | Ultra-fine sand roadbed structure for hydraulic filling in low-lying marsh areas |
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