CN207552833U - A kind of elevated bridge basal perimeter ground road structure - Google Patents
A kind of elevated bridge basal perimeter ground road structure Download PDFInfo
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- CN207552833U CN207552833U CN201721313897.9U CN201721313897U CN207552833U CN 207552833 U CN207552833 U CN 207552833U CN 201721313897 U CN201721313897 U CN 201721313897U CN 207552833 U CN207552833 U CN 207552833U
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- cushion cap
- elevated bridge
- basal perimeter
- road
- road structure
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Abstract
The utility model is related to a kind of elevated bridge basal perimeter ground road structures, it is characterized in that elevated bridge cushion cap edge sets chamfering, peripheral path step excavation is to cushion cap bottom, it backfills more than at the top of rubble, gravel or sand to cushion cap, form peripheral path roadbed, it bankets to form stable slope face above bridge bearing platform, setting geotextiles form Stable sliding face between backfill and peripheral path roadbed above cushion cap, so as to which road foundation decanting zone and cushion cap decanting zone are formed two independent decanting zones.Finally complete subgrade and pavement and central strip belt construction.Compared with prior art, the utility model is easy for construction, cost economic, and prevention elevated bridge basal perimeter surface road differential settlement works well.
Description
Technical field
The utility model belongs to highway layout, construction field, and in particular to a kind of elevated bridge basal perimeter surface road
Structure, suitable for controlling elevated bridge basal perimeter surface road differential settlement.
Background technology
For saving, intensive road traffic land used, elevated bridge basis both sides can generally set motor vehicle driveway nearby.From
At present from the point of view of domestic city overhead expressway construction situation, elevated bridge basal perimeter surface road uneven subsidence is more
It is prominent, seriously affect vehicle driving safety.In general, urban road inside lane side is sunk due to the reinforcement effect of bridge pile foundation
Drop is smaller, and opposite side is then on soft soil foundation, and general only to carry out conventional backfill processing sedimentation larger.Therefore, city road
Often there is longitudinal direction and jumps vehicle, lateral seeping phenomenon or even cause road safety accident in road inside lane road surface.How economic solution is soft
Soil base region elevated bridge basal perimeter surface road nonuniform settlement avoids longitudinal direction from jumping the diseases such as vehicle, lateral ponding and goes out repeatedly
It is existing, one of most significant problems that the person that is urban road construction, maintenance management person face.
Utility model content
The purpose of this utility model is to provide a kind of elevated bridge basal perimeter ground road structure, with solving weak soil
Base region, elevated bridge basal perimeter surface road uneven subsidence.
To achieve these goals, the technical solution of the utility model is as follows：A kind of elevated bridge basal perimeter ground road
Line structure, it is characterised in that elevated bridge cushion cap edge set chamfering, elevated bridge cushion cap outside backfill rubble, gravel or
More than at the top of sand to cushion cap, peripheral path roadbed is formed, bankets to form stable slope face above bridge bearing platform, returned above cushion cap
Banket sets geotextiles to form Stable sliding face between peripheral path roadbed, so as to which road foundation decanting zone and cushion cap be settled
Area forms two independent decanting zones, and backfilled roadbed supported road surface filler forms subgrade and pavement, the roadbed above peripheral path roadbed
Road surface includes bed course, base, face layer.
Further, bridge bearing platform bottom is excavated on the outside of the bridge bearing platform, forms step-like excavation area, the step
Backfilled roadbed supported filler in shape excavation area.
Further, elevated bridge cushion cap chamfering setting width is 20 ~ 50cm, and depth is 20 ~ 80cm.
Further, fill material using planting soil and is compacted above bridge bearing platform, should be exceeded at planting soil slope slope foot
Cushion cap corner cut 3 ~ 5cm of line, to prevent road foundation compacting, driving from being elapsed caused by squeezing.
Further, cushion cap surrounding step excavation is not less than two-stage, backfills more than at the top of rubble, gravel or sand to cushion cap
Afterwards, steel plastic geogrid is overlayed in bed course bottom, steel plastic geogrid should keep certain distance, and not with cushion cap hemline
Less than 0.5m.
Further, the subgrade and pavement is with setting step at existing pavement edge.
Further, Fibergrass polyester mat is laid with above base, to reduce the generation of reflection cracking in a pavement.
Further, setting glued board above cushion cap, is isolated, glued plate thickness between pavement of road roadbed filling
Not less than 5mm.
Further, the geotextiles use adhesive-bonded fabric, should keep certain distance, and be not less than with cushion cap hemline
0.5m.Its gripping strength answers >=1.2KN, punctures intensity and answers >=0.3KN, trap tear strength answers >=0.3KN, CBR bursting strengths
Should >=2.5KN.
Further, the Fibergrass polyester mat Unit Weight：>=125g/m2, thickness：≤ 1.2mm, tensile strength（It is vertical
To）：>=8KN/m, fracture elongation（Vertically and horizontally）：≤ 5%, CBR bursting strength：>=550N, fusing point：≥257℃.
Further, the road foundation, pavement excavation step are suitable for cushion cap neighboring area, and road excavation step is not small
In two-stage, width is not less than 1.0m, uses back-filling in layers to meet design compaction requirement；Pavement excavation step width is not less than
Pavement structure layer thickness, base should all set step with face layer.
Integral Thought is that chamfering, the setting of planting soil slope are set at elevated bridge cushion cap edge used by the utility model
Newly-built road foundation roadbed subsidence area and cushion cap decanting zone are formed two relatively independent decanting zones by the processing such as sliding surface, so as to
It prevents pavement of road from the situation of differential settlement laterally occur, and then avoids the appearance of longitudinal differential settlement.
Compared with prior art, the utility model has the following advantages that：
1）The utility model carries out comprehensive chamfered to conventional section cushion cap edge, is set between cushion cap and roadbed steady
Determine sliding surface, formation that is easy to operate and greatly facilitating independent decanting zone；
2）The utility model is compared partly is carrying out basement process, very saving construction cost to cushion cap periphery in the prior art,
And effect is more excellent；
3）The utility model not only plays the role of Reinforced subgrade in roadbed longitudinal direction boundary setting geotextiles, is formed simultaneously cunning
Dynamic face, is isolated two decanting zones；
4）The geotextiles that the utility model is set in roadbed top surface maintain certain distance with cushion cap hemline, to prevent
Road subgrade compaction, driving elapse caused by squeezing, and then influence the formation of two independent decanting zones；
5）The utility model detaches cushion cap decanting zone with road settlement area, to processing bridge foundation peripheral path road
Base differential settlement has good effect.
6）The utility model between present situation road excavation step not less than two-stage and backfill it is advantageous reduce new and old roadbed not
Uniform settlement, so as to reduce longitudinal crack.
Description of the drawings
Fig. 1 bridge bearing platform peripheral plane figures；
Fig. 2 bridge bearing platforms periphery elevation.
Figure includes：Cushion cap chamfering 1, cushion cap surrounding step excavation 2, graded broken stone 3, cushion cap top backfill region 4 are new and old
Pavement edge step 5, steel modeling direction earthwork grille 6, Stable sliding face 7, glued board 8, polyester fiber cloth 9, cushion cap 10, column
11, bed course 12, base 13, face layer 14, kerbstone 15, covering layer 16.
Specific embodiment
The technique effect of the design of the utility model, concrete structure and generation is described further below in conjunction with attached drawing.
As shown in Figure 1, for a kind of common elevated bridge lower flat layout drawing, set at surface road median strip
Many places column, due to the presence of upright post basic and pile foundation, the road on ordinary circumstance lower pillar stand periphery is not in sedimentation, and other
Road can be because settle the reason of soft soil foundation, so that elevated bridge cushion cap periphery creates road generation with present situation
Relative settlement.Leading to the problem of for relative settlement not only will appear surface gathered water, more seriously when vehicle is travelled in ground road
During the inside lane of road, due to the protuberance of cushion cap peripheral path, vehicle appearance longitudinal direction is caused to jump vehicle and laterally imbalance, influences vehicle row
Sail safety.If things go on like this, the utilization rate of surface road inside lane will lower significantly.
It is right using the control method suitable for elevated bridge basal perimeter surface road differential settlement of the utility model
The road is transformed, and basic skills is：Chamfering 1 is set in cushion cap edge, old road step 2 is excavated and is no less than two-stage, return
It fills out more than at the top of rubble, gravel or sand 3 to cushion cap, bankets to form stable slope face above bridge bearing platform, thus by Road
Base is settled to be settled to form two independent decanting zones with cushion cap.Finally complete subgrade and pavement and central strip belt construction.
Cushion cap chamfering 1 should be completed in construction bearing platform according to design drawing formwork erection, and general width is 20 ~ 50cm, and depth is
20 ~ 80cm, length are all areas to connect with the auxiliary road in ground.Chamfered be considered as influence bridge structure safe it is related because
Element must not be implemented after cushion cap molding.
Cushion cap top surface earthing arranges two-stage step by >=1.5m controls, cushion cap surrounding step excavation 2, and first order step is opened
It digs width b to control with 1.0m, height Δ h can be adjusted according to cushion cap depth, and every grade of bench excavation depth is Δ h/2 in figure.Step
In the range of using rubble, gravel or sand back-filling in layers it is smooth, compactness, grading should meet《Town road engineering construction quality
With acceptance specification》（CJJ1-2008）Requirement.
Generally in room planting design segmentation band, backfilling material should in the range of certain depth in backfill region 4 above cushion cap
Meet plant growth needs, need appropriate compacting.The formation of setting geotextiles is inclined between backfill and peripheral path roadbed above cushion cap
Oblique Stable sliding face 7.
Using graded broken stone 3 in the range of cushion cap top to pavement structure bottom, such as rubble, gravel or sand compaction in layers, every layer is filled out
It builds thickness and is generally no greater than 30cm, compactness should reach《Town road engineering construction quality and acceptance specification》（CJJ1-2008）
Requirement.One layer of steel modeling direction earthwork grille 6 should be overlayed at the top of roadbed, steel modeling direction earthwork grille should be kept with cushion cap hemline
Certain distance, and not less than 0.5m.Steel modeling direction earthwork grille preferably uses umbo point pattern, to ensure that Node connectedness is secured,
Performance requirement is as follows：1. endwise tensile strength：≥100KN；Transverse tensile strength：≥100KN；2. elongation：≤3%；Node is shelled
From power：≥500N.Simultaneously in order to reduce overlap joint engineering quantity, steel modeling direction earthwork grille breadth is not preferably less than 2.0m.Cushion cap top
It is isolated between face roadbed filling and pavement of road using glued board 8, glued board should use I classes（NQF）, thickness is not less than
5mm。
Steel modeling direction earthwork grille 6 is sequentially arranged above bed course 12, base 13, face layer 14, and base 13 uses cement stabilizing
Metalling.
New-old pavement edge should dig into step, polyester fiber cloth 9 be set between face layer and cement stabilized macadam layer, to subtract
The generation of few reflection cracking in a pavement is laid with width and is not less than 1.0m.Fibergrass polyester mat Unit Weight：≥125g/m2, thickness：≤
1.2mm, tensile strength（Longitudinal direction）：>=8KN/m, fracture elongation（Vertically and horizontally）：≤ 5%, CBR bursting strength：>=550N, fusing point：
≥257℃。
Finally, according to《Highway road surface construction technology detailed rules and regulations》（JTG/T F20-2015）、《Asphalt highway is constructed
Technical specification》（JTG F40-2004）Complete pavement of road construction.
The utility model is the control method of elevated bridge basal perimeter surface road differential settlement, suitable for weak soil
Base region, the prevention side of peripheral path settlement of subgrade when bridge bearing platform sideline is apart from 0 ~ 25cm of median strip sideline
Method.The utility model is easy for construction, cost economic, and control effect is good, has a vast market application prospect.
The above content is combine specific preferred embodiment further detailed description of the utility model, it is impossible to
Assert that the utility model specific implementation is confined to these above-mentioned explanations.For the common skill of the utility model technical field
For art personnel, without departing from the concept of the premise utility, several simple deduction or replace can also be made, all should
It is considered as belonging to the scope of protection of the utility model.According to the introduction of the present embodiment, those skilled in the art completely can be real
Technical solution in existing other scope of protection of the utility model.
Claims (7)
1. a kind of elevated bridge basal perimeter ground road structure, it is characterised in that elevated bridge cushion cap edge sets chamfering,
The outside of elevated bridge cushion cap is backfilled more than at the top of rubble, gravel or sand to cushion cap, peripheral path roadbed is formed, in bridge bearing platform
Top bankets to form stable slope face, and setting geotextiles form Stable sliding between backfill and peripheral path roadbed above cushion cap
Face so as to which road foundation decanting zone and cushion cap decanting zone are formed two independent decanting zones, backfills above peripheral path roadbed
Subgrade and pavement filler forms subgrade and pavement, and the subgrade and pavement includes bed course, base, face layer.
2. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that elevated bridge cushion cap falls
Angle setting width is 20 ~ 50cm, and depth is 20 ~ 80cm.
3. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that filled out above bridge bearing platform
Soil material is using planting soil and is compacted, and 3 ~ 5cm of cushion cap corner cut line should be exceeded at planting soil slope slope foot.
4. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that peripheral path backfill is broken
After more than at the top of stone, gravel or sand to cushion cap, steel modeling direction earthwork grille is overlayed in bed course bottom, steel plastic geogrid should
Certain distance is kept, and not less than 0.5m with cushion cap hemline.
5. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that be laid with above base poly-
Ester glass-fiber-fabric, to reduce the generation of reflection cracking in a pavement.
6. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that setting glue above cushion cap
Plywood is isolated between the filler of road foundation road surface.
7. elevated bridge basal perimeter ground road structure as described in claim 1, it is characterised in that the geotextiles use
Adhesive-bonded fabric should keep certain distance, and not less than 0.5m with cushion cap hemline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313897.9U CN207552833U (en) | 2017-10-12 | 2017-10-12 | A kind of elevated bridge basal perimeter ground road structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313897.9U CN207552833U (en) | 2017-10-12 | 2017-10-12 | A kind of elevated bridge basal perimeter ground road structure |
Publications (1)
| Publication Number | Publication Date |
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| CN207552833U true CN207552833U (en) | 2018-06-29 |
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ID=62674206
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| CN201721313897.9U Active CN207552833U (en) | 2017-10-12 | 2017-10-12 | A kind of elevated bridge basal perimeter ground road structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110565462A (en) * | 2019-09-11 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Roadbed and pavement structure for preventing uneven settlement of motor vehicle lane under viaduct |
-
2017
- 2017-10-12 CN CN201721313897.9U patent/CN207552833U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110565462A (en) * | 2019-09-11 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Roadbed and pavement structure for preventing uneven settlement of motor vehicle lane under viaduct |
| CN110565462B (en) * | 2019-09-11 | 2024-05-07 | 上海市城市建设设计研究总院（集团）有限公司 | Roadbed and pavement structure for preventing motor vehicle lane under viaduct from unevenly settling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210730 Address after: 200092 No. two, 901 North Road, Yangpu District, Shanghai, Zhongshan Patentee after: SHANGHAI MUNICIPAL ENGINEERING DESIGN INSTITUTE (Group) Co.,Ltd. Patentee after: SHANGHAI MUNICIPAL ENGINEERING DESIGN Co.,Ltd. Address before: 200092 No. two, 901 North Road, Yangpu District, Shanghai, Zhongshan Patentee before: SHANGHAI MUNICIPAL ENGINEERING DESIGN INSTITUTE (Group) Co.,Ltd. |