CN206256333U - A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation - Google Patents
A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation Download PDFInfo
- Publication number
- CN206256333U CN206256333U CN201621200621.5U CN201621200621U CN206256333U CN 206256333 U CN206256333 U CN 206256333U CN 201621200621 U CN201621200621 U CN 201621200621U CN 206256333 U CN206256333 U CN 206256333U
- Authority
- CN
- China
- Prior art keywords
- roadbed
- fluidised form
- filling material
- form filling
- star
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Road Paving Structures (AREA)
Abstract
The utility model provides a kind of High-Grade Highway Subgrade widening structure of prevention differential deformation, including former roadbed side slope, fluidised form filling material and roadbed bound edge soil, and former roadbed side slope is excavated into the step with " cross " connected in star；Fluidised form filling material is arranged on the side that former roadbed needs to widen, and the lower surface of fluidised form filling material is adapted with the step of " cross " connected in star；Fluidised form filling material placement layer by layer sets roadbed bound edge soil into step on the outside of fluidised form filling material；The widened section roadbed top laying pavement structure that former roadbed and fluidised form filling material are poured.The utility model is by the slope excavating of existing roadbed into the step with " cross " connected in star, when fluidised form filling material pours widened section roadbed, fluidised form material can voluntarily fill full " cross " connected in star, and be an entirety of same material with widened section roadbed, so treat fluidised form filling material formed intensity after, son is carved equivalent to making widened section roadbed that multiple has been squeezed on existing roadbed, the contact between new-old concrete bond is greatly strengthened, the resistance to overturning after Roadbed Widening is effectively improved.
Description
Technical field
The utility model belongs to highway engineering construction field, more particularly, to a kind of high-grade highway of prevention differential deformation
Widening of subgrade structure.
Background technology
With China's expanding economy and the increase year by year of vehicle population, some high-grade highways that China builds early stage
The volume of traffic has tended to saturation, is the comfortableness and rapidity that avoid traffic congestion, improve driving, needs badly to some high-grade highways
Carry out widening transformation, to improve the traffic capacity of highway, the need for adapting to social economy to highway transportation.
High-grade highway widen transformation in, because the original roadbed of highway and ground have already been through nature for many years
Sedimentation and the effect of vehicular load, self-deformation has been stablized, and newly-built widened section roadbed and its ground can also generating unit
Divide sedimentation and deformation and compression, cause to produce settlement difference before new-old concrete bond, and then cause pavement cracking, influence highway work
The use quality of journey.The differential deformation between new-old concrete bond how is avoided and controls, the overall steady of rear highway subgrade is widened in raising
It is qualitative, it is an engineering challenge for perplexing highway engineering circle always.
In order to promote the contact between new-old concrete bond, promote compatibility of deformation between the two, typically by the side of existing roadbed
Step is excavated on slope, and the measures such as GSZ are laid on step, promotes the phase mutual friction between new-old concrete bond, to a certain degree
On can reduce Differential settlement deformation.For some soft soil foundation sections, especially widen width it is smaller and it is highly larger when, greatly
Type construction machinery is difficult compacting, at this moment fills widened section roadbed with fluidised form light material, can effectively reduce those widened sections branch
The deadweight of base and its to the additional stress of ground, and then reduce compression and the sedimentation and deformation of widened section roadbed, and then subtract
Differential deformation small and between control new-old concrete bond.But the stage interface that existing roadbed is excavated when general subgrade is widened is flat
, the interaction force between new-old concrete bond filler is limited.In addition, in the larger section of longitudinal slope, after being open to traffic under extreme condition very
Longitudinal difference deformation between new-old concrete bond may occur.In a word, existing technology be difficult fundamentally to solve new-old concrete bond it
Preceding differential deformation stabilization.
Utility model content
In order to solve problems of the prior art, the utility model proposes a kind of high-grade public affairs of prevention differential deformation
Road widening of subgrade structure, while Differential settlement deformation and possible longitudinal direction between solution high-grade highway new-old concrete bond are uneven
Problem on deformation.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation, including former roadbed, fluidised form filling material and road
Base bound edge soil, the slope excavating of the former roadbed is into the step with " cross " connected in star；Fluidised form filling material is arranged on former road
Base needs the side widened；The lower surface of fluidised form filling material is adapted with the step of " cross " connected in star；The fluidised form is filled
Layers of material is poured and builds up step, and roadbed bound edge soil is set on the outside of fluidised form filling material；The former roadbed and fluidised form are filled
The widened section roadbed top laying pavement structure that material is poured.
Further, the step with " cross " connected in star includes that step and " cross " shape excavated thereon are recessed
Groove, the width of the step is 1.0m~2.5m, and depth-width ratio is 1：1.5；" cross " connected in star is rectangle, the depth of groove
It is the 1/3 of shoulder height, and not less than 0.5m, recess width is the 1/3 of step width, and not less than 0.5m.
Further, described " cross " connected in star includes orthogonal two grooves, and longitudinal fluting is (parallel to driving side
To) it is located at the centre of step；Transverse concave groove has a plurality of, is each perpendicular to direction of traffic, the spacing of transverse concave groove for 2.0m~
3.0m。
Relative to prior art, the High-Grade Highway Subgrade widening structure of prevention differential deformation described in the utility model has
There is following advantage：
(1) by the slope excavating of existing roadbed into the step with " cross " connected in star, fluidised form fills material to the utility model
When material pours widened section roadbed, fluidised form material can voluntarily fill full " cross " connected in star, and be same with widened section roadbed
One entirety of kind of material, after so treating that fluidised form filling material forms intensity, equivalent to making widened section roadbed on original road
Multiple is squeezed on base and has carved son, greatly strengthened the contact between new-old concrete bond, effectively improved whole after Roadbed Widening
Body stability；
(2) presence of the longitudinal fluting in " cross " connected in star of the present utility model can greatly strengthen those widened sections branch
Lateral ties between base and existing roadbed so that widened section roadbed produce sedimentation and deformation when must by part it is downward should
Power is applied to existing roadbed, reduces differential deformation between the two；Meanwhile, the presence of longitudinal fluting causes that widened section roadbed is sent out
Raw horizontal sliding is hardly possible, and then prevents pavement structure to produce longitudinal cracking problem in new-old concrete bond junction；
(3) presence of the transverse concave groove in " cross " connected in star of the present utility model so that when longitudinal slope is larger, in outer masterpiece
With occurring between lower widened section roadbed and existing roadbed, straight skidding is hardly possible, and then prevents longitudinal direction between new-old concrete bond
The generation of differential deformation, prevents when highway longitudinal slope is larger, and pavement structure occurs Transverse Cracks problem under external force.
Brief description of the drawings
Fig. 1 is the utility model widening of subgrade feature cross-section schematic diagram；
Fig. 2 is the utility model widening of subgrade structure three-dimensional schematic top plan view；
Description of reference numerals：
1- original roadbeds, steps of the 2- with " cross " connected in star, 3- fluidised form filling materials, 4- baffle plates, 5- roadbeds bound edge soil,
6- pavement structures, 7- steps, 8- " cross " connected in star；9- longitudinal flutings, 10- transverse concave grooves.
Specific embodiment
In the case where not conflicting, the feature in embodiment and embodiment in the utility model can be mutually combined.
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation as shown in Figure 1 and Figure 2, including former roadbed 1,
Fluidised form filling material 3 and roadbed bound edge soil 5, the slope excavating of the former roadbed 1 is into the step 2 with " cross " connected in star；Stream
State filling material 3 is arranged on the side that former roadbed needs to widen；The platform of the lower surface of fluidised form filling material 3 and " cross " connected in star
Rank 2 is adapted；The placement layer by layer of fluidised form filling material 3 sets roadbed bound edge into step in the outside of fluidised form filling material 3
Soil 5；The widened section roadbed top laying pavement structure 6 that the former roadbed 1 and fluidised form filling material 3 are poured.
The step 2 with " cross " connected in star includes step 7 and " cross " connected in star 8 for excavating thereon, described
The width of step 7 is 1.0m~2.5m, and depth-width ratio is 1：1.5；" cross " connected in star 8 is rectangle, and the depth of groove 8 is platform
The 1/3 of the height of rank 7, and not less than 0.5m, the width of groove 8 is the 1/3 of the width of step 7, and not less than 0.5m.
" cross " connected in star 8 includes orthogonal 2 grooves, and longitudinal fluting 9 (parallel to direction of traffic) is located at
The centre of step 7；Transverse concave groove 10 is each perpendicular to direction of traffic with a plurality of, and the spacing of transverse concave groove 10 is 2.0m~3.0m.
The Specific construction step of the present embodiment is as follows：
(1) first cleaning, smooth construction site, if soft soil foundation section, in addition it is also necessary to according to design bearing capacity enter
Row Soft Ground.
(2) former roadbed side slope is excavated into the step 2 with " cross " connected in star, the vertical height of step 7 is 1.5m, step
7 transverse widths are 2.25m, and the depth of " cross " connected in star 8 is 0.5m, and width is 0.75m.Longitudinal fluting 9 is being located at step 7 just
In, the spacing of transverse concave groove 10 is 2.0m.
(3) position of baffle plate 4 when determining that fluidised form filling material is poured, and baffle plate 4 is fixed.The present embodiment is Four-Lane Road one
Level Highway is six-lane Class I highway, and bilateral is widened, and width is widened per side for 3.75m.
(4) the fluidised form filling material 3 of ground floor (orlop) is poured, the fluidised form filling material that the present embodiment is poured is foam
Light soil (can also be liquid cinder), individual layer pours thickness for 1.5m, highly identical with step 7.
(the present embodiment curing time is 3 after (5) first laminar flow regime filling materials pour completion, and health certain age
My god), fixed dam 4, pour the second laminar flow regime filling material 3 again, and 2.25m is moved in the position of baffle plate 4 in last layer border.And
Afterwards the like, until widened section roadbed is poured and finished.
(6) after fluidised form filling material 3 is all poured, conserves completion, all of baffle plate 4, filling roadbed bound edge are removed
Soil 5.
(7) after subgrade construction is completed, pavement structure is built, completes other engineerings of highway.
One embodiment explanation of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (3)
1. it is a kind of prevent differential deformation High-Grade Highway Subgrade widening structure, it is characterised in that：Including former roadbed (1), fluidised form
Filling material (3) and roadbed bound edge soil (5), the slope excavating of the former roadbed (1) is into the step with " cross " connected in star
(2)；Fluidised form filling material (3) is arranged on the side that former roadbed needs to widen；The lower surface of fluidised form filling material (3) and " cross "
The step (2) of connected in star is adapted；Fluidised form filling material (3) placement layer by layer into step, and in fluidised form filling material (3)
Outside sets roadbed bound edge soil (5)；The widened section roadbed top paving that the former roadbed (1) and fluidised form filling material (3) are poured
If pavement structure (6).
2. it is according to claim 1 prevention differential deformation High-Grade Highway Subgrade widening structure, it is characterised in that：It is described
Step (2) with " cross " connected in star includes step (7) and " cross " connected in star (8) for excavating thereon, the step (7)
Width be 1.0m~2.5m, depth-width ratio is 1：1.5；" cross " connected in star (8) is rectangle, and the depth of groove (8) is platform
The 1/3 of rank (7) height, and not less than 0.5m, groove (8) width is the 1/3 of step (7) width, and not less than 0.5m.
3. it is according to claim 2 prevention differential deformation High-Grade Highway Subgrade widening structure, it is characterised in that：It is described
" cross " connected in star (8) includes orthogonal two grooves, longitudinal fluting (9) parallel to direction of traffic, positioned at step (7)
It is middle；Transverse concave groove (10) is each perpendicular to direction of traffic with a plurality of, and the spacing of transverse concave groove (10) is 2.0m~3.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621200621.5U CN206256333U (en) | 2016-11-07 | 2016-11-07 | A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621200621.5U CN206256333U (en) | 2016-11-07 | 2016-11-07 | A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206256333U true CN206256333U (en) | 2017-06-16 |
Family
ID=59024271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621200621.5U Active CN206256333U (en) | 2016-11-07 | 2016-11-07 | A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206256333U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761125A (en) * | 2019-12-04 | 2020-02-07 | 中铁二院工程集团有限责任公司 | Rock foundation existing high-speed rail coarse-grained soil filled embankment side width structure and construction method |
-
2016
- 2016-11-07 CN CN201621200621.5U patent/CN206256333U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110761125A (en) * | 2019-12-04 | 2020-02-07 | 中铁二院工程集团有限责任公司 | Rock foundation existing high-speed rail coarse-grained soil filled embankment side width structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203960883U (en) | One both wired high embankment is helped wide ruggedized construction | |
| CN203174453U (en) | Light-mass embankment structure for managing bump at bridge head | |
| CN109914173B (en) | Foam light soil pouring table back structure in expressway reconstruction and extension project and construction method thereof | |
| CN104328730B (en) | The construction method of embedded reinforcement bitumen layer transformation cement concrete pavement | |
| CN105113386A (en) | Stage back suitable for preventing bridgehead bump on high filling subgrade | |
| CN107151960A (en) | The soft interim sidewalk laying structure in base and laying method | |
| CN206815127U (en) | The soft interim sidewalk laying structure in base | |
| CN107034789B (en) | Abutment Back combination backfill construction method | |
| CN206256333U (en) | A kind of High-Grade Highway Subgrade widening structure of prevention differential deformation | |
| CN105804101A (en) | Load-reducing retaining system capable of reducing stress of retaining structure, construction method and applications | |
| CN206385411U (en) | It is a kind of to prevent the steep embankment ruggedized construction of height of differential settlement | |
| CN205501750U (en) | Supporting structure of be used for pavement to widen transformation | |
| CN106192652A (en) | A kind of high steep embankment ruggedized construction preventing differential settlement | |
| CN206721592U (en) | A kind of Anti-settling device of highway subgrade | |
| CN207017093U (en) | New-old concrete bond widens seam-line removal structure | |
| CN105220620A (en) | The bumping at bridge-head processing method of darker mud soft soil foundation after platform | |
| CN203270559U (en) | Roadbed structure of screw pile network structure composite foundation | |
| CN205115945U (en) | Double -deck synchronous surface dressing stress absorption structure | |
| CN207552833U (en) | A kind of elevated bridge basal perimeter ground road structure | |
| CN110172885A (en) | Highway Construction in Desert method | |
| CN110952388B (en) | Design method of high-speed railway wide-roadbed compacted pile combined pile-network foundation structure | |
| CN204898452U (en) | Platform back of body structure of road bed either end of a bridge | |
| CN205276128U (en) | Bridge deck pavement leveling layer structure | |
| CN213507862U (en) | Municipal administration road widen structure | |
| CN213389548U (en) | Settlement-preventing roadbed for deep soft soil high fill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 30, Haitai South Road, High tech Industrial Park, Binhai New Area, Tianjin, 300392 Patentee after: Tianjin municipal engineering design and Research Institute Co.,Ltd. Address before: No. 30, Haitai South Road, High tech Industrial Park, Binhai New Area, Tianjin, 300392 Patentee before: TIANJIN MUNICIPAL ENGINEERING DESIGN & Research Institute |