CN208869894U - The reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation - Google Patents
The reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation Download PDFInfo
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- CN208869894U CN208869894U CN201821132455.9U CN201821132455U CN208869894U CN 208869894 U CN208869894 U CN 208869894U CN 201821132455 U CN201821132455 U CN 201821132455U CN 208869894 U CN208869894 U CN 208869894U
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Abstract
The utility model discloses a kind of reinforced structures for preventing and treating old widening of subgrade position sedimentation and deformation, it is placed under new road surface and old pavement comprising base on step and the third three-dimensional geogrid set gradually from top to bottom, cement stabilized macadam, the second three-dimensional geogrid, cement stabilized macadam go to a grassroots level, the first three-dimensional geogrid, granular cushion；Third three-dimensional geogrid, the second three-dimensional geogrid, the first three-dimensional geogrid protrude into old road base；The step is located under old pavement, and the third three-dimensional geogrid is located under new road surface.The utility model is by being laid with three-dimensional geogrid in lap-joint to enhance new-old concrete bond connectivity, reduce new-old concrete bond differential settlement, widening road bed is reduced along the slippage of new-old concrete bond faying face, reinforces the reinforced structure of the prevention and treatment old widening of subgrade position sedimentation and deformation of roadbed globality and stability.
Description
Technical field
The utility model relates to highway construction fields, and in particular to a kind of to prevent and treat adding for old widening of subgrade position sedimentation and deformation
Muscle structure.
Background technique
During road construction, it is usually directed to the enlarging of highway.During highway reconstruction and expansion, roadbed and Jiu Lu are created
It is had a certain difference between base, this species diversity will cause roadbed damage.Roadbed damage refers to widening road bed along new-old concrete bond knot
Sliding and new-old concrete bond relative settlement occur for conjunction face.
When widening road bed is smaller along the slippage of new-old concrete bond faying face, new-old concrete bond faying face can generate faulting of slab ends,
Under will lead to the combination surface intensity of new-old concrete bond after causing the pavement cracking of new-old concrete bond junction, rainwater to be entered by crack sharply
Drop, very big hidden danger is left to subgrade stability；When slippage is larger, new-old concrete bond is combined loosely, may make new road construction
Base total collapse, causes widening pavement integrally to destroy, and existing roadbed can be made to occur unstability in succession when serious and lead to original road surface
Also recurring structure damage and the decline using function.
New-old concrete bond relative settlement is by Settlement in Construction Period and applies settlement after construction and forms.Settlement in Construction Period be go into operation from roadbed to
When roadbed filling is completed, along with a time-continuing process of roadbed filling construction.Apply settlement after construction be after the roadbed filling,
In one longer time, influenced by soil body self weight, top pavement construction and traffic load, the infall process of generation.Cause
The factor of highway subgrade overlapping part Differential settlement deformation mainly has: new-old concrete bond rigidity difference, new Subgrade Compaction deficiency are drawn
The relative settlement that rises, lap position deals with improperly.
Utility model content
The purpose of this utility model is to provide a kind of new-old concrete bond lap-joints in reorganization and expansion highway subgrade, by taking
The place of connecing is laid with three-dimensional geogrid reinforced structure to enhance new-old concrete bond connectivity, reduces new-old concrete bond differential settlement, and reduction is widened
Along the slippage of new-old concrete bond faying face, the old widening of subgrade position of prevention and treatment for reinforcing roadbed globality and stability settles roadbed
The reinforced structure of deformation.
The technical scheme adopted by the utility model is
A kind of reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation, is placed under new road surface and old pavement comprising
Base on step and the third three-dimensional geogrid set gradually from top to bottom, cement stabilized macadam, the second three-dimensional geogrid,
Cement stabilized macadam goes to a grassroots level, the first three-dimensional geogrid, granular cushion；Third three-dimensional geogrid, the second three-dimensional soil
Work grid, the first three-dimensional geogrid protrude into old road base；The step is located under old pavement, third three-dimensional geotechnique's lattice
Grid are located under new road surface.
According to the above scheme, third three-dimensional geogrid, the second three-dimensional geogrid, the first three-dimensional geogrid include more
A node, adjacent node are connected by lacing wire, and every three nodes and three lacing wires form a cell compartment triangular in shape, are enhanced
The globality and stability of roadbed eliminate new-old concrete bond lap-joint differential settlement and lateral displacement purpose to reach.
According to the above scheme, the third three-dimensional geogrid is connect by U-shaped anchor studs with base on cement stabilized macadam,
Second three-dimensional geogrid is gone to a grassroots level with cement stabilized macadam by U-shaped anchor studs and is connect, and the first three-dimensional geogrid passes through U-shaped
Anchor studs are connect with granular cushion, so that total is more stable.
According to the above scheme, third three-dimensional geogrid, the second three-dimensional geogrid, the limit of the first three-dimensional geogrid are anti-
Tensile strength >=50kN/m, tensile strength >=20kN/m when 2% elongation, so that total is more stable.
According to the above scheme, the height of the step is between 0.5~1.5m, and width is between 1~2m, and entire step
The introversion gradient is 2%~4%.
According to the above scheme, the granular cushion with a thickness of 15~20cm, and granular cushion protrudes into old roadbed
The width of base is B；It is B that cement-stabilizing broken stone described in the water, which goes to a grassroots level and protrudes into the width of old road base,；The cement stabilizing
It is B that base, which protrudes into the width of old road base, on rubble；So that new-old concrete bond overlap joint is firm.
The utility model has the beneficial effects that:
By setting step and three layers of three-dimensional geogrid, so that new-old concrete bond is formed an entirety, new-old concrete bond is made to have foot
Enough stability avoids new-old concrete bond from vertically and horizontally disease (sliding, new-old concrete bond relative settlement occur for new-old concrete bond faying face) occur,
New-old concrete bond differential settlement is reduced, reduces widening road bed along the slippage of new-old concrete bond faying face；
Three-dimensional geogrid to roadbed filling (base, cement stabilized macadam are gone to a grassroots level on cement stabilized macadam) provide compared with
Big sidewise restraint effect, interlocking strengthen roadbed filling, limit the lateral displacement of roadbed filling, reduce new-old concrete bond sedimentation
Difference reduces widening road bed along the slippage of new-old concrete bond faying face；
The node of three-dimensional geogrid and lacing wire are to roadbed filling (on cement stabilized macadam under base, cement stabilized macadam
Base) upward friction supporting force is produced, one is formd with the larger curved complex for drawing rigidity and shearing strength, is made whole
A structure is more stable；
The lacing wire of three-dimensional geogrid reduces roadbed vertical stress and shear stress, enhances the globality and stabilization of roadbed
Property, new-old concrete bond lap-joint differential settlement and lateral displacement purpose are eliminated to reach；
It is simple and reasonable for structure, economically feasible.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the structural schematic diagram of third three-dimensional geogrid, the second three-dimensional geogrid, the first three-dimensional geogrid；
Fig. 3 is the structural schematic diagram of U-shaped anchor studs；
Wherein: 1.1, new road surface, 1.2 old pavements, 2, new roadbed, 3, old roadbed, 4, step, 5, third three-dimensional geotechnique's lattice
Grid, 6, base on cement stabilized macadam, the 7, second three-dimensional geogrid, 8, cement stabilized macadam go to a grassroots level, the 9, first three-dimensional soil
Work grid, 10, granular cushion, 11, node, 12, lacing wire, 13, cell compartment, 14, U-shaped anchor studs.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
Referring to figures 1-3, a kind of reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation is placed in new 1.1 He of road surface
Under old pavement 1.2 comprising base on step 4 and the third three-dimensional geogrid 5 set gradually from top to bottom, cement stabilized macadam
Layer the 6, second three-dimensional geogrid 7, cement stabilized macadam are gone to a grassroots level the 8, first three-dimensional geogrid 9, granular cushion 10；The
Three three-dimensional geogrids 5, the second three-dimensional geogrid 7, the first three-dimensional geogrid 9 protrude into old 3 base of roadbed.Step 4 is located at
Under old pavement 1.2, the height of step 4 is between 0.5~1.5m, and width is between 1~2m, and the introversion gradient of entire step 4
It is 2%~4%；Third three-dimensional geogrid 5 is located under new road surface 1.1.
In the present embodiment, third three-dimensional geogrid 5, the second three-dimensional geogrid 7, the first three-dimensional geogrid 9 are wrapped
Multiple nodes 11 are included, adjacent node 11 is connected by lacing wire 12, and every three nodes 11 and three lacing wires 12 form one in triangle
The cell compartment 13 of shape eliminates new-old concrete bond lap-joint differential settlement and lateral displacement purpose to reach.In order to make total
More stable, third three-dimensional geogrid 5 is connect by U-shaped anchor studs 14 with base 6 on cement stabilized macadam, the second three-dimensional soil
Work grid 7 is gone to a grassroots level 8 connections by U-shaped anchor studs 14 and cement stabilized macadam, and the first three-dimensional geogrid 9 passes through U-shaped anchoring
Nail 14 is connect with granular cushion 10, and third three-dimensional geogrid 5, the second three-dimensional geogrid 7, first three-dimensional geotechnique's lattice
Ultimate tensile strength >=50kN/m of grid 9, tensile strength >=20kN/m when 2% elongation.
In the present embodiment, granular cushion 10 with a thickness of 18cm, and granular cushion 10 protrudes into old 3 base of roadbed
Width be B (rice)；Cement-stabilizing broken stone described in water go to a grassroots level 8 protrude into old 3 base of roadbed width be B (rice)；Cement stabilizing is broken
The width that Shi Shang base 6 protrudes into old 3 base of roadbed is B (rice)；So that new roadbed 2 and the overlap joint of old roadbed 3 are firm.
Construction procedure are as follows:
To make new-old concrete bond overlap joint firm, old roadbed is carried out to cut slope processing, side slope 0.3m thickness and former road shoulder at digging
0.5m wide making filler again；Transversely step excavation, the width of step scrape out wide 2m, slope according to its topographic features in slope surface
Foot is nearby 2~2.5m, and is made into 2%~4% introversion horizontal slope；
New roadbed bed course fills thick 20cm graded broken stone, granular cushion is formed, with old roadbed lap width B=2m；
After the completion of graded broken stone filling technology, it is laid with the first three-dimensional geogrid on it, it is solid with U-shaped anchor studs on old roadbed
First three-dimensional geogrid, is fixed on granular cushion by fixed first three-dimensional geogrid by U-shaped anchor studs；
The cement stabilized macadam for being laid with thickness 16cm on the first three-dimensional geogrid is gone to a grassroots level, and cement stabilized macadam is gone to a grassroots level
With old roadbed lap width B=2m；
Cement stabilized macadam is gone to a grassroots level fill after the completion of, its top surface be laid with the second three-dimensional geogrid, on old roadbed
The second three-dimensional geogrid is fixed with U-shaped anchor studs, the second three-dimensional geogrid is fixed on cement stabilizing by U-shaped anchor studs
On rubble is gone to a grassroots level；
Base on the cement stabilized macadam of 16cm, base on the cement stabilized macadam are laid on the second three-dimensional geogrid
With old roadbed lap width B=2m；
After the completion of base fills on cement stabilized macadam, it is laid with third three-dimensional geogrid in its top surface, and in old roadbed
On with U-shaped anchor studs fix third three-dimensional geogrid, it is steady that third three-dimensional geogrid is fixed on cement by U-shaped anchor studs
Determine on rubble in base；
Fill road surface structare layer.
After the completion of each layer of three-dimensional geogrid is laid with, it should cover in time to avoid solarization aging, influence reinforced action.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (8)
1. a kind of reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation, is placed under new road surface and old pavement, feature exists
In: base, the second three-dimensional soil on the third three-dimensional geogrid that sets gradually including step and from top to bottom, cement stabilized macadam
Work grid, cement stabilized macadam go to a grassroots level, the first three-dimensional geogrid, granular cushion；Third three-dimensional geogrid, second
Three-dimensional geogrid, the first three-dimensional geogrid protrude into old road base；The step is located under old pavement, the third three-dimensional
TGXG is located under new road surface.
2. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1, it is characterised in that: third
Three-dimensional geogrid, the second three-dimensional geogrid, the first three-dimensional geogrid include multiple nodes, and adjacent node passes through lacing wire
Connection, every three nodes and three lacing wires form a cell compartment triangular in shape.
3. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1 or 2, it is characterised in that:
The third three-dimensional geogrid is connect by U-shaped anchor studs with base on cement stabilized macadam, and the second three-dimensional geogrid is logical
It crosses U-shaped anchor studs and goes to a grassroots level with cement stabilized macadam and connect, the first three-dimensional geogrid passes through U-shaped anchor studs and graded broken stone pad
Layer connection.
4. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1, it is characterised in that: third
Three-dimensional geogrid, the second three-dimensional geogrid, the first three-dimensional geogrid ultimate tensile strength >=50kN/m, 2% elongation
When tensile strength >=20kN/m.
5. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1, it is characterised in that: described
The height of step is between 0.5 ~ 1.5m, and width is between 1 ~ 2m, and the introversion gradient of entire step is 2%~4%.
6. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1, it is characterised in that: described
Granular cushion with a thickness of 15 ~ 20cm, and it is B that granular cushion, which protrudes into the width of old road base,.
7. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 1 or 6, it is characterised in that:
It is B that the cement stabilized macadam, which goes to a grassroots level and protrudes into the width of old road base,.
8. the reinforced structure of prevention and treatment old widening of subgrade position sedimentation and deformation according to claim 7, it is characterised in that: described
It is B that base, which protrudes into the width of old road base, on cement stabilized macadam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821132455.9U CN208869894U (en) | 2018-07-17 | 2018-07-17 | The reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821132455.9U CN208869894U (en) | 2018-07-17 | 2018-07-17 | The reinforced structure for preventing and treating old widening of subgrade position sedimentation and deformation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777586A (en) * | 2019-10-28 | 2020-02-11 | 中交路桥建设有限公司 | A structure for road bed difference is subsided |
| CN114673041A (en) * | 2022-03-23 | 2022-06-28 | 中国铁建港航局集团有限公司 | Soft soil foundation embankment disease disposal construction method |
| CN114875731A (en) * | 2022-06-01 | 2022-08-09 | 中建一局集团第二建筑有限公司 | Transition structure for eliminating differential settlement of new and old road surfaces and construction method thereof |
-
2018
- 2018-07-17 CN CN201821132455.9U patent/CN208869894U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777586A (en) * | 2019-10-28 | 2020-02-11 | 中交路桥建设有限公司 | A structure for road bed difference is subsided |
| CN114673041A (en) * | 2022-03-23 | 2022-06-28 | 中国铁建港航局集团有限公司 | Soft soil foundation embankment disease disposal construction method |
| CN114673041B (en) * | 2022-03-23 | 2023-09-05 | 中国铁建港航局集团有限公司 | Soft soil foundation embankment disease treatment construction method |
| CN114875731A (en) * | 2022-06-01 | 2022-08-09 | 中建一局集团第二建筑有限公司 | Transition structure for eliminating differential settlement of new and old road surfaces and construction method thereof |
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