CN203212964U - Rubble type expressway subgrade widening structure on ice-rich and ice-saturated segment - Google Patents
Rubble type expressway subgrade widening structure on ice-rich and ice-saturated segment Download PDFInfo
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- CN203212964U CN203212964U CN 201320199466 CN201320199466U CN203212964U CN 203212964 U CN203212964 U CN 203212964U CN 201320199466 CN201320199466 CN 201320199466 CN 201320199466 U CN201320199466 U CN 201320199466U CN 203212964 U CN203212964 U CN 203212964U
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Abstract
The utility model relates to a rubble type expressway subgrade widening structure on an ice-rich and ice-saturated segment. When highways in permafrost regions are subjected to widening reconstruction, differential settlement can happen to new and old subgrades and then is reflected to pavement structure layers, so that longitudinal cracks appear between the new and old subgrades and the pavement performances are seriously affected. The structure is characterized in that a widened subgrade is arranged on the side slope of an original subgrade; a side slope cut step is arranged after an original subgrade side slope of the original subgrade is cut; a base gravel layer is arranged from the bottom edge of the side slope cut step to the slope toe of the widened subgrade on the base of the widened subgrade; a base geogrid is paved on the base gravel layer; a rubber layer, a permeable geotextile, a broken stone layer, a gravel layer and a geogrid are paved on the base geogrid in sequence; and a widened subgrade filling layer is filled in the geogrid. The structure is low in construction cost, has long service life, strong bearing capacity and good water resistance, effectively solves the engineering problem of utilizing old roads for widening in the construction process of roads in permafrost regions, and fills in the gaps in the technical field.
Description
Technical field
The utility model relates to a kind of road structure, is specifically related to a kind of rich ice, the express highway roadbed structure of widening of full ice highway section sheet piece stone type.
Background technology
Build speedway in Permafrost Area, if widen reconstruction at existing ever-frozen ground region two-stage highway, then can significantly save construction investment.Because widening roadbed and the former road of haveing been friends in the past of part there are differences aspect permafrost degradation and the ground consolidation degree, after roadbed was widened, new and old roadbed can produce relative settlement, and then reflexed to road surface structare layer, cause between new and old roadbed longitudinal crack taking place, have a strong impact on pavement performance.The G214 of the Qinghai Province national highway of building at present (republicanism is to the cajaput section), in process of construction, run into the engineering problem that utilizes old road to widen, because also do not carry out the roadbed widening project in Permafrost Area before, therefore, widening problem for permafrost area embankment does not also have corresponding Disposal Measures.
Summary of the invention
The purpose of this utility model provides a kind of rich ice, the express highway roadbed structure of widening of full ice highway section sheet piece stone type, overcomes the relative settlement problem that new and old roadbed produces in the roadbed widening project.
The technical scheme that the utility model adopts is:
A kind of rich ice, the express highway roadbed structure of widening of full ice highway section sheet piece stone type include existing roadbed, it is characterized in that:
Existing roadbed side slope side is for widening roadbed;
The existing roadbed side slope of existing roadbed arranges the slope excavation step through cutting after handle on the slope;
Widen the roadbed substrate and to widening the roadbed toe substrate sandy gravel stratum is set from slope excavation step root edge, lay the substrate geo-grid on the substrate sandy gravel stratum, lay sheet block stone layer, permeable geotextiles, macadam, sandy gravel stratum and geo-grid on the substrate geo-grid successively, fill out on the geo-grid to establish and widen the roadbed filling layer.
Described existing roadbed cut the slope be treated to cut by the 1:1.0 gradient downwards from the inboard 75cm of existing roadbed curb place sloping to the toe place.
The shoulder height of described slope excavation step is 1m, and wide is 1m, and lean-in 3% the gradient.
The thickness of described substrate sandy gravel stratum is 50cm.
The sheet piece stone particle diameter of described block stone layer is 15-30cm, and bed thickness is 0.9-1.5m.
The bed thickness of described macadam is 20cm.
The bed thickness of described sandy gravel stratum is 20cm.
The utlity model has following advantage:
The utility model is related widens road structure, and construction cost is low, long service life, bearing capacity is strong, good waterproof performance has solved the engineering problem that utilizes old road to widen that runs in the Permafrost Area road construction process effectively, has filled up the blank of this technical field.
Description of drawings
Fig. 1 is the utility model structure chart.
Among the figure, the 1-existing roadbed, 2-slope excavation step, the 3-geo-grid, the 4-sandy gravel stratum, the 5-macadam, the permeable geotextiles of 6-, 7-sheet block stone layer, 8-substrate geo-grid, 9-substrate sandy gravel stratum, 10-widens the roadbed filling layer, and 11-widens roadbed.
The specific embodiment
Below in conjunction with the specific embodiment the utility model is described in detail.
A kind of rich ice described in the utility model, the express highway roadbed structure of widening of full ice highway section sheet piece stone type include existing roadbed 1, and existing roadbed 1 side slope side is for widening roadbed 11.The existing roadbed side slope 3 of existing roadbed 1 arranges slope excavation step 2 through cutting after handle on the slope.Existing roadbed 1 cut the slope be treated to cut by the 1:1.0 gradient downwards from the inboard 75cm of existing roadbed 1 curb place sloping to the toe place; The shoulder height of slope excavation step 2 is 1m, and wide is 1m, and lean-in 3% the gradient, the two-layer shoulder height in top according to roadbed raising adjust, guarantee that the uppermost steps height is 0.8 meter.Widen roadbed 11 substrates and to widening roadbed 4 toes substrate sandy gravel stratum 9 is set from slope excavation step 2 root edges, lay substrate geo-grid 8 on the substrate sandy gravel stratum 9, lay sheet block stone layer 7, permeable geotextiles 6, macadam 5, sandy gravel stratum 4 and geo-grid 3 on the substrate geo-grid 8 successively, fill out on the geo-grid 3 to establish and widen roadbed filling layer 10.Wherein, the thickness of substrate sandy gravel stratum 9 is 50cm; The sheet piece stone particle diameter of sheet block stone layer 7 is 15-30cm, and bed thickness is 0.9-1.5m; The bed thickness of macadam 5 is 20cm; The bed thickness of sandy gravel stratum 4 is 20cm.
Concrete construction sequence is:
Step 1: fill 50cm ballast or gravel at the natural surface of widening the roadbed position, carry out impact-rolling; To former roadbed side slope cleaning brush slope, eliminate surface dust, cut the slope to the toe place by 1:1.0 downwards from the inboard 75cm of earth shoulder then, successively excavate step on then to descending.The excavation single order in time fills single order, 1 meter of shoulder height, wide 1 meter and lean-in 3% slope.The two-layer shoulder height in top according to roadbed raising adjust, guarantee that the uppermost steps height is 0.8 meter, respectively lay the high-strength geo-grid of one deck in the bottom of substrate and roadbed, geo-grid is routed to from the step inner edge widens roadbed side slope.
Step 2: adopt sheet piece stone to fill and widen roadbed, piece stone particle diameter 15-30cm, bed thickness 0.9-1.5m, the 20cm rubble is filled on piece stone top, fills 20cm ballast or gravel again.
It is cited that content of the present utility model is not limited to embodiment, and the conversion of any equivalence that those of ordinary skills take technical solutions of the utility model by reading the utility model manual is claim of the present utility model and contains.
Claims (7)
1. the rich express highway roadbed structure of widening of ice highway section sheet piece stone type of icing, satisfy includes existing roadbed (1), it is characterized in that:
Existing roadbed (1) side slope side is for widening roadbed (11);
The existing roadbed side slope (3) of existing roadbed (1) arranges slope excavation step (2) through cutting after handle on the slope;
Widen roadbed (11) substrate and to widening roadbed (4) toe substrate sandy gravel stratum (9) is set from slope excavation step (2) root edge, substrate sandy gravel stratum (9) is gone up and is laid substrate geo-grid (8), lay sheet block stone layer (7), permeable geotextiles (6), macadam (5), sandy gravel stratum (4) and geo-grid (3) on the substrate geo-grid (8) successively, fill out on the geo-grid (3) to establish and widen roadbed filling layer (10).
2. a kind of richness according to claim 1 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
Described existing roadbed (1) cut the slope be treated to cut by the 1:1.0 gradient downwards from the inboard 75cm of existing roadbed (1) curb place sloping to the toe place.
3. a kind of richness according to claim 1 and 2 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
The shoulder height of described slope excavation step (2) is 1m, and wide is 1m, and lean-in 3% the gradient.
4. a kind of richness according to claim 3 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
The thickness of described substrate sandy gravel stratum (9) is 50cm.
5. a kind of richness according to claim 4 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
The sheet piece stone particle diameter of described block stone layer (7) is 15-30cm, and bed thickness is 0.9-1.5m.
6. a kind of richness according to claim 5 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
The bed thickness of described macadam (5) is 20cm.
7. a kind of richness according to claim 6 is iced, is satisfied and ice the express highway roadbed structure of widening of highway section sheet piece stone type, it is characterized in that:
The bed thickness of described sandy gravel stratum (4) is 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199466 CN203212964U (en) | 2013-04-19 | 2013-04-19 | Rubble type expressway subgrade widening structure on ice-rich and ice-saturated segment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320199466 CN203212964U (en) | 2013-04-19 | 2013-04-19 | Rubble type expressway subgrade widening structure on ice-rich and ice-saturated segment |
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| CN203212964U true CN203212964U (en) | 2013-09-25 |
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| CN 201320199466 Expired - Fee Related CN203212964U (en) | 2013-04-19 | 2013-04-19 | Rubble type expressway subgrade widening structure on ice-rich and ice-saturated segment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762979A (en) * | 2015-03-31 | 2015-07-08 | 中铁十九局集团第三工程有限公司 | Flexible revetment for railroad bed in frozen earth area and construction method of revetment |
| CN104818658A (en) * | 2015-05-13 | 2015-08-05 | 山西省交通科学研究院 | Road widening system and road widening method for collapsible yellow earth foundation layer |
| CN105672072A (en) * | 2016-02-26 | 2016-06-15 | 青岛林川工程技术咨询有限公司 | Main track traffic-keeping method used during construction period of highway reconstruction and extension |
| CN105926391A (en) * | 2016-06-12 | 2016-09-07 | 西南交通大学 | Method for widening shoulder of existing railway subgrade |
| CN107119522A (en) * | 2017-06-22 | 2017-09-01 | 中国建筑土木建设有限公司 | The structure and construction method of new-old concrete bond linking |
| CN107700299A (en) * | 2017-10-12 | 2018-02-16 | 上海市政工程设计研究总院（集团）有限公司 | A kind of elevated bridge lower floor road structure and its construction method |
| CN107858886A (en) * | 2017-10-12 | 2018-03-30 | 上海市政工程设计研究总院（集团）有限公司 | A kind of elevated bridge basal perimeter surface road and its construction method |
| CN108193573A (en) * | 2018-01-25 | 2018-06-22 | 梁海平 | For the road structure and construction method of road widening |
| CN111304986A (en) * | 2020-02-27 | 2020-06-19 | 中交二公局第四工程有限公司 | Construction method for treating soft foundation settlement in plateau frozen soil area |
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2013
- 2013-04-19 CN CN 201320199466 patent/CN203212964U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104762979A (en) * | 2015-03-31 | 2015-07-08 | 中铁十九局集团第三工程有限公司 | Flexible revetment for railroad bed in frozen earth area and construction method of revetment |
| CN104818658A (en) * | 2015-05-13 | 2015-08-05 | 山西省交通科学研究院 | Road widening system and road widening method for collapsible yellow earth foundation layer |
| CN105672072A (en) * | 2016-02-26 | 2016-06-15 | 青岛林川工程技术咨询有限公司 | Main track traffic-keeping method used during construction period of highway reconstruction and extension |
| CN105926391A (en) * | 2016-06-12 | 2016-09-07 | 西南交通大学 | Method for widening shoulder of existing railway subgrade |
| CN107119522B (en) * | 2017-06-22 | 2020-03-06 | 中国建筑土木建设有限公司 | New and old roadbed connection structure and construction method |
| CN107119522A (en) * | 2017-06-22 | 2017-09-01 | 中国建筑土木建设有限公司 | The structure and construction method of new-old concrete bond linking |
| CN107700299A (en) * | 2017-10-12 | 2018-02-16 | 上海市政工程设计研究总院（集团）有限公司 | A kind of elevated bridge lower floor road structure and its construction method |
| CN107858886A (en) * | 2017-10-12 | 2018-03-30 | 上海市政工程设计研究总院（集团）有限公司 | A kind of elevated bridge basal perimeter surface road and its construction method |
| CN107858886B (en) * | 2017-10-12 | 2024-04-02 | 上海市政工程设计研究总院（集团）有限公司 | Viaduct foundation peripheral ground road and construction method thereof |
| CN107700299B (en) * | 2017-10-12 | 2024-04-02 | 上海市政工程设计研究总院（集团）有限公司 | Overpass lower-layer ground road structure and construction method thereof |
| CN108193573A (en) * | 2018-01-25 | 2018-06-22 | 梁海平 | For the road structure and construction method of road widening |
| CN108193573B (en) * | 2018-01-25 | 2019-04-26 | 梁海平 | Road structure and construction method for road widening |
| CN111304986A (en) * | 2020-02-27 | 2020-06-19 | 中交二公局第四工程有限公司 | Construction method for treating soft foundation settlement in plateau frozen soil area |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |