CN203034328U - Joint part treatment structure of reconstruction and extension project of expressway - Google Patents
Joint part treatment structure of reconstruction and extension project of expressway Download PDFInfo
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- CN203034328U CN203034328U CN 201320025244 CN201320025244U CN203034328U CN 203034328 U CN203034328 U CN 203034328U CN 201320025244 CN201320025244 CN 201320025244 CN 201320025244 U CN201320025244 U CN 201320025244U CN 203034328 U CN203034328 U CN 203034328U
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Abstract
The utility model discloses a joint part treatment structure of a reconstruction and extension project of an expressway. Steps (6) are excavated on a roadbed joint part of an old embankment (10) and a new embankment (7) to be spliced with the new embankment (7), geogrids (5) are paved on the steps (6), a CGF pile (cement flyash gravel pile) (8) is arranged on the roadbed joint part of the old embankment (10) and the new embankment (7), longitudinal beams (9) are arranged on the CFG pile (8), and a steel wire gauze is paved on the roadbed joint part of the old embankment (10) and the new embankment (7) of a new road surface (4). Due to the combination of the CFG pile (8) and the longitudinal beams (9), the bearing capacity of the new-old roadbed joint part can be improved, and the settlement can be reduced. Horizontal linkage of the new roadbed and the old roadbed can be strengthened, differential settlement of the new roadbed and the old roadbed can be eliminated, and total settlement can be reduced due to combination of the reinforced road surface technology of the geogrids (5) and the double twisted steel wire gauze (3).
Description
Technical field
The utility model relates to a kind of highway reconstruction and expansion engineering joint portion punishment structure, particularly a kind of speedway reconstruction and extension project joint portion punishment structure.
Background technology
The construction of new embankment can cause old embankment to produce new relative settlement in the speedway reconstruction and extension project, and between new, old embankment, produce sedimentation and deformation, cause diseases such as embankment drawing crack, pavement destruction, new and old subgrade and pavement joint portion punishment improper measures wherein, it is the one of the main reasons of widening of subgrade relative settlement, new and old subgrade and pavement joint portion is the weak part of reconstruction and extension project, the easiest generation subgrade defect.Usually main old road embankment bench excavation, geosynthetics reinforcement cushion and reinforcement embankment, the geotextile of adopting prevents blending engineering measures such as draining.These technical measures all are the relative settlements at new and old roadbed joint portion, at the technical measures of new old pavement joint portion relative settlement then seldom, find a kind of punishment technology at the new and old subgrade and pavement of speedway reconstruction and extension project joint portion, when reducing new and old embankment differential subsidence, reduce new old pavement differential subsidence, can reduce new and old subgrade settlement distortion, new and old pavement disease etc., the speedway reconstruction and extension project is significant.
The utility model content
Technical problem to be solved in the utility model provides a kind of bearing capacity that improves new and old roadbed joint portion, reduce sedimentation, can strengthen the lateral ties of new and old roadbed, eliminate the speedway reconstruction and extension project joint portion punishment structure of differential settlement and the minimizing total settlement of new and old roadbed.
In order to solve the problems of the technologies described above, the speedway reconstruction and extension project joint portion punishment structure that the utility model adopts, old embankment has step and described new roadbed splicing with the roadbed joint portion excavation of new roadbed, be equipped with geo-grid at described step, roadbed joint portion at described old embankment and described new roadbed is provided with the CFG stake, described CFG stake is provided with longeron, is equipped with gauze wire cloth at the described old embankment on new road surface and the joint portion, road surface of described new roadbed.
Described gauze wire cloth is located between the last bonding surface and following bonding surface of joint portion, road surface of the described old embankment on described new road surface and described new roadbed.
Described geo-grid laterally is laid on the described step.
When the roadbed filling of described old embankment was clay, sandy loam, the described step width of splicing place was not less than 2.0m; When the roadbed filling of described old embankment was sandy soil, the described step width of splicing place was not less than 1.5m, and described step slopes inwardly 2%～4%, and the height of described step is no more than 1.5m.
Described gauze wire cloth is the twisted pair gauze wire cloth.
Described CFG stake is double, and described longeron is double.
Described CFG stake is to be formed by the compound perfusion that cement, flyash, stone, aggregate chips (sand) blunge form, and has certain adhesion strength.
1.5m is laid on the new road surface of described gauze wire cloth above described new roadbed, and 2m is laid on the new road surface above described old embankment.
Adopt the speedway reconstruction and extension project joint portion punishment structure of technique scheme, reduced the relative settlement phenomenon of new and old roadbed joint portion in the speedway reconstruction and extension project, combination by CFG stake and longeron, can improve the bearing capacity of new and old roadbed joint portion, reduce sedimentation, by the combination of geo-grid and twisted pair gauze wire cloth reinforcement pavement technique, can strengthen the lateral ties of new and old roadbed, eliminate the differential settlement of new and old roadbed and reduce total settlement.
In sum, the utility model is a kind of bearing capacity that improves new and old roadbed joint portion, reduce sedimentation, can strengthen the lateral ties of new and old roadbed, eliminate the differential settlement of new and old roadbed and reduce total settlement and safe and reliable, as to save cost speedway reconstruction and extension project joint portion punishment structure.
Description of drawings
Fig. 1 is joint portion of the present invention plan view.
Fig. 2 is twisted pair gauze wire cloth of the present invention.
Fig. 3 is CFG stake schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Referring to Fig. 1, Fig. 2 and Fig. 3, old embankment 10 has step 6 and new roadbed 7 splicings with the roadbed joint portion excavation of new roadbed 7, and when the roadbed filling of old embankment 10 was clay, sandy loam, step 6 width of splicing place were not less than 2.0m; When the roadbed filling of old embankment 10 is sandy soil, step 6 width of splicing place are not less than 1.5m, tilt 2%～4% in the step 6, the height of step 6 is no more than 1.5m, on step 6, laterally be equipped with geo-grid 5, roadbed joint portion at old embankment 10 and new roadbed 7 is provided with double CFG stake 8, CFG stake 8 is by cement, flyash, stone, the compound perfusion that aggregate chips (sand) blunge forms forms, has certain adhesion strength, double CFG stake 8 is provided with double longeron 9, be equipped with twisted pair gauze wire cloth 3 between bonding surface 1 and the following bonding surface 2 on the joint portion, road surface of the old embankment 10 on new road surface 4 and new roadbed 7,1.5m is laid on the new road surface 4 of twisted pair gauze wire cloth 3 above new roadbed 7, and 2m is laid on the new road surface 4 above old embankment 10.
The size of twisted pair gauze wire cloth 3 as shown in Figure 2, twisted pair gauze wire cloth 3 wide 3.5m, 1.5m is laid on new road surface 4 above new roadbed 7, and 2m is laid on the new road surface 4 above old embankment 10, and its anti-relative settlement to new old pavement joint portion in the speedway reconstruction and extension project has remarkable result.
Referring to Fig. 1, Fig. 2 and Fig. 3, speedway reconstruction and extension project of the present utility model joint portion punishment structure, comprise the twisted pair gauze wire cloth 3 of reinforcement between the road surface, be arranged at the CFG stake 8 of new and old roadbed joint portion, be arranged at the longeron 9 in the CFG stake 8 and be layed in the geo-grid 5 at step 6 places, new and old roadbed joint portion, its construction sequence is as follows:
1) carries out the excavation of the step 6 of old roadbed 10 at first from bottom to top, thereby increase the contact surface of new and old roadbed, improve frictional resistance and the shear strength of the bonding surface of new and old roadbed, step 6 adopts the introversion formula, the gradient is between the 2%-4%, and the width of step 6 is not less than 1.5m, highly is no more than 1.5m;
2) lay geo-grid 5, characteristics such as geo-grid 5 has the tensile strength height, and elongation rate is low, and is not yielding, the geo-grid 5 that is layed in new and old roadbed joint portion can increase the shear resistance of new and old roadbed joint portion, prevents that new roadbed 7 sedimentations are to the destruction of old roadbed 10;
3) after old roadbed 10 sedimentations tend towards stability, fill at new roadbed 7 and in new and old roadbed joint portion double CFG stake 8 to be set after finishing, after construction is finished, after cutting CFG stake 8 pile crown unconsolidated formations, one longeron 9 is set thereon, surfacing on longeron 9, and between the last bonding surface 1 of joint portion, road surface and following bonding surface 2, lay 3 pairs of new old pavements of twisted pair gauze wire cloth joint portion and carry out reinforcement.
Claims (8)
1. structure is punished in a speedway reconstruction and extension project joint portion, it is characterized in that: old embankment (10) has step (6) and described new roadbed (7) splicing with the roadbed joint portion excavation of new roadbed (7), be equipped with geo-grid (5) at described step (6), roadbed joint portion at described old embankment (10) and described new roadbed (7) is provided with CFG stake (8), described CFG stake (8) is provided with longeron (9), is equipped with gauze wire cloth at the described old embankment (10) on new road surface (4) and the joint portion, road surface of described new roadbed (7).
2. speedway reconstruction and extension project according to claim 1 joint portion punishment structure is characterized in that: described gauze wire cloth is located between the last bonding surface (1) and following bonding surface (2) of joint portion, road surface of the described old embankment (10) on described new road surface (4) and described new roadbed (7).
3. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: described geo-grid (5) laterally is laid on the described step (6).
4. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: when the roadbed filling of described old embankment (10) was clay, sandy loam, described step (6) width of splicing place was not less than 2.0m; When the roadbed filling of described old embankment (10) was sandy soil, described step (6) width of splicing place was not less than 1.5m, and described step (6) slopes inwardly 2%～4%, and the height of described step (6) is no more than 1.5m.
5. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: described gauze wire cloth is twisted pair gauze wire cloth (3).
6. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: described CFG stake (8) is for double, and described longeron (9) is double.
7. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: described CFG stake (8) is to be formed by the compound perfusion that cement, flyash, stone, aggregate chips (sand) blunge form, and has certain adhesion strength.
8. speedway reconstruction and extension project according to claim 1 and 2 joint portion punishment structure, it is characterized in that: described gauze wire cloth is laid 1.5m on the new road surface (4) of described new roadbed (7) top, new road surface (4) the laying 2m in the top of described old embankment (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320025244 CN203034328U (en) | 2013-01-17 | 2013-01-17 | Joint part treatment structure of reconstruction and extension project of expressway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320025244 CN203034328U (en) | 2013-01-17 | 2013-01-17 | Joint part treatment structure of reconstruction and extension project of expressway |
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| Publication Number | Publication Date |
|---|---|
| CN203034328U true CN203034328U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320025244 Expired - Fee Related CN203034328U (en) | 2013-01-17 | 2013-01-17 | Joint part treatment structure of reconstruction and extension project of expressway |
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| CN (1) | CN203034328U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046446A (en) * | 2013-01-17 | 2013-04-17 | 长沙理工大学 | Treatment structure at joint part of reconstruction and extension project of highway |
| CN104294719A (en) * | 2014-09-26 | 2015-01-21 | 云南省交通规划设计研究院 | Method for reorganizing and expanding route of alpine valley highways |
| CN105755919A (en) * | 2016-03-07 | 2016-07-13 | 长沙理工大学 | Widened highway old embankment side slope seepage treatment structure |
| CN105926406A (en) * | 2016-04-29 | 2016-09-07 | 中交公局第工程有限公司 | Splicing method and structure for new and old roads in reconstruction and extension of pavement |
-
2013
- 2013-01-17 CN CN 201320025244 patent/CN203034328U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046446A (en) * | 2013-01-17 | 2013-04-17 | 长沙理工大学 | Treatment structure at joint part of reconstruction and extension project of highway |
| CN103046446B (en) * | 2013-01-17 | 2015-12-09 | 长沙理工大学 | A kind of Expressway Extension Project joint portion treatment structures |
| CN104294719A (en) * | 2014-09-26 | 2015-01-21 | 云南省交通规划设计研究院 | Method for reorganizing and expanding route of alpine valley highways |
| CN105755919A (en) * | 2016-03-07 | 2016-07-13 | 长沙理工大学 | Widened highway old embankment side slope seepage treatment structure |
| CN105926406A (en) * | 2016-04-29 | 2016-09-07 | 中交公局第工程有限公司 | Splicing method and structure for new and old roads in reconstruction and extension of pavement |
| CN105926406B (en) * | 2016-04-29 | 2018-11-02 | 中交一公局第一工程有限公司 | A kind of joining method and structure on old road new in reorganization and expansion pavement construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20140117 |