CN203741670U - Old road extension splicing structure based on drainage and crack resistance - Google Patents
Old road extension splicing structure based on drainage and crack resistance Download PDFInfo
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- CN203741670U CN203741670U CN201320836863.3U CN201320836863U CN203741670U CN 203741670 U CN203741670 U CN 203741670U CN 201320836863 U CN201320836863 U CN 201320836863U CN 203741670 U CN203741670 U CN 203741670U
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- asphalt surface
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Abstract
The utility model discloses an old road extension splicing structure based on drainage and crack resistance, and belongs to the field of road engineering. The structure comprises an old road asphalt surface layer and a new road asphalt surface layer, and an old road base layer is paved beneath the old road asphalt surface layer. The old road extension splicing structure is characterized in that a flexible asphalt treated drainage base layer, a dense semi-rigid material subbase and a graded broken stone drainage cushion layer, which have certain thicknesses, are arranged beneath the new road asphalt surface layer in sequence, wherein a structural layer splicing step with certain width is arranged at the splicing seam of the new road asphalt surface layer and the old road asphalt surface layer, a structural layer splicing step with certain width is arranged at the splicing seam of the flexible asphalt treated drainage base layer and the dense semi-rigid material subbase of the new road and the old rod base layer. Compared with the prior art, the splicing structure of the utility model solves the problems of a traditional method that the internal drainage of the pavement structure is poor, the settlement of old and new pavements is non-uniform and the old and new pavements crack along the splicing seams, and after being spliced, the service life of an integral structure of the old and new pavements is long, so that the old road extension splicing structure has very good promotion and application values.
Description
Technical field
The utility model relates to highway construction field, specifically a kind of enlarging of the old road based on draining cracking resistance splicing construction.
Background technology
Along with rapid economic development, traffic counting increases rapidly, and the origin road traffic capacity can not meet society need, certainly will will widen reconstruction.The splicing on road surface is the maximum difficult point of current reconstruction and extension project, is also the key of quality control.Traditional Pavement mosaic method is all to adopt the road structure identical with old road, does not consider the compatibility of deformation problem on old road inside configuration drainage problem and new old road.
China's active service flexible pavement more than 90% is Pavement on Semi-rigid Type Base structure, the advantage of this road structure is that semi-rigid material rigidity is large, plate body is better, shortcoming is that semi-rigid material easily produces drying shrinkage and warm draw seam, and its modulus also constantly decays with action of traffic loading.Semi-rigid asphalt pavement is through operation all the year round, natural precipitation by road show, crack place or median strip infiltrate between deck and inner, makes in structure ponding in a large number.While adopting traditional joining method, because new paving semi-rigid material is very fine and close, block the channel of old road constitution water to exosmosis, infiltrate the shipwreck of inside configuration to discharge, there is very soon the diseases such as cracking, purt slurry, loose and hole groove in road structure under the repeated action of traffic load or freeze thawing, more easily there is cracking, pumping in seam crossing particularly, brings and have a strong impact on to traffic safety.In addition, due to the decay in a large number of old road semi-rigid type base modulus, Yu Xin road semi-rigid type base modulus difference is very large, if adopt same structure will certainly cause flexure and sedimentation inhomogeneous, seam crossing cracking and a series of derivative disease causing are thus inevitable.
Summary of the invention
Technical assignment of the present utility model is for above-mentioned the deficiencies in the prior art, and a kind of enlarging of the old road based on draining cracking resistance splicing construction is provided.The old and new's road structure internal drainage of this splicing construction is unobstructed, distortion evenly, coordinate, can not produce the Structural defects such as cracking, purt slurry, hole groove, sedimentation, the rear the old and new's Pavement Condition of splicing is good, the overall road structure life-span is long.
Technical assignment of the present utility model is realized in the following manner: a kind of enlarging of the old road based on draining cracking resistance splicing construction, comprise asphalt surface course Ji Xin road, old road asphalt surface course, under the asphalt surface course of old road, be equipped with old road basic unit, be characterized in: under the asphalt surface course of new road, set gradually certain thickness flexible bituminisation Drainage Base, the closely knit subbase of semi-rigid material, graded broken stone drainage blanket, new road asphalt surface course and old road asphalt surface course splicing seam crossing, and the flexible bituminisation Drainage Base on new road, the closely knit subbase of semi-rigid material and old road basic unit splicing seam crossing are provided with the deck splicing step of certain width.
Described new road asphalt surface course, its structure and thickness are identical with structure, the thickness of old road asphalt surface course.
In order to prevent and delayed reflex crack, stop road table moisture to permeate along seam downwards, the old and new's Pavement mosaic place is longitudinally provided with one deck steel and moulds grid in the closely knit subbase of semi-rigid material, and the width that steel is moulded grid is 300 ~ 600cm.Upper surface layer bottom at asphalt surface course is respectively arranged with the monolateral Singed non-woven fabrics of long filament that width is 50 ~ 150cm.
The width of each deck splicing step is preferably respectively: the each deck 15 ~ 20cm of asphalt surface course; Basic unit and subbase 50 ~ 75cm.
Described flexible bituminisation Drainage Base preferably adopts the extraordinary bulky grain bituminous concrete moxture drainage blanket that gathers materials, thickness 8 ~ 15cm;
The closely knit subbase of described semi-rigid material preferably adopts cement or lime-flyash stabilization macadam, thickness 45 ~ 60cm;
Described graded broken stone drainage blanket is arranged between subbase and roadbed end face, preferably adopts open gradation structure, thickness 15 ~ 20cm.
Compared with prior art, splicing construction of the present utility model has following beneficial effect highlightedly:
(1) this structure is damaged mechanism of production based on constitution water, become water shutoff into hydrophobic, the flexible extraordinary bulky grain of the macrovoid bituminous concrete moxture that gathers materials combines with porous graded broken stone, adapted to the requirement of road structure internal drainage system, solved widen track and adjacent old lane structure internal drainage problem and thus derivative road structure destroy problem;
(2) this structure is followed road surface mechanics principle, the combined type road structure of design, the gather materials graded broken stone of asphalt macadam and bed course of the extraordinary bulky grain of basic unit has load pooling feature, the old and new road surface overall structure with old road step splicing complete together with special seepage control and crack resistance material is set, solve the problem of deformation and differential settlement, greatly improved the overall performance of widening the old and new's road structure.
Brief description of the drawings
Accompanying drawing 1 is the full shield schematic diagram of the utility model splicing construction embodiment.
Detailed description of the invention
A kind of enlarging of the old road based on draining cracking resistance splicing construction of the present utility model is described in detail below with specific embodiment with reference to Figure of description.
Embodiment:
One, as shown in drawings, old road of the present utility model structure
The upper asphalt surface course 1 of 4cmSMA-13()+6cmAC-20C(medium pitch surface layer 2) asphalt surface course 3 under+7cmAC-25C()+36cm cement stabilized macadam base 4(divides two-layer construction, upper basic unit and each 18cm that goes to a grassroots level)+20cm lime stabilized soil subbase 5+ old road base 6.
Two, old road deck is carried out to layering milling
New old road splicing seam crossing is arranged on the outside graticule center line in track outside old road 7.Laterally old road deck is carried out to layering milling from splicing seam crossing 7, corresponding with old road road structure, the deck splicing step 8 of the reserved certain width of milling.
The step width of medium pitch surface layer 2, lower asphalt surface course 3, cement stabilized macadam base 4 and subbase 5 correspondences is respectively 15cm, 15cm, 50cm, 60cm.
Three, carry out the concatenation construction of the old and new's line structure layer
The new upper asphalt surface course 12 of line structure: 4cmSMA-13()+6cmAC-20C(medium pitch surface layer 13) asphalt surface course 14 under+7cmAC-25C()+10cm flexibility closely knit the subbase of bituminisation Drainage Base 15+32cm semi-rigid material (comprising the low dosage cement stabilized macadam 17 of 15cm and the cement stabilized macadam 16 of thickness 36cm)+new roadbed 19 of 15cm graded broken stone drainage blanket 18+.
The monolateral Singed non-woven fabrics 9 of long filament of two-layer width 90cm is longitudinally set at the bottom of upper surface layer; The steel that overlays one deck width 450cm in the closely knit subbase of semi-rigid material is moulded between grid 11(low dosage cement stabilized macadam 17 and cement stabilized macadam 16).
Concrete splicing step is:
A) after splicing roadbed 19 compaction treatment, making open gradation dewatering type granular cushion 18
In order to solve the drainage problem of Subgrade of old road 6 end faces, the open gradation dewatering type granular cushion 18 of design making thickness 15cm.Granular cushion void content scope 18% ~ 24%, its level is equipped with each particle diameter mineral aggregate by standard size sieve aperture percentage meter, and scope of design is as follows:
31.5mm，85%~100%；26.5mm，65%~85%；16mm，42%~67%；9.5mm，20%~40%；4.75mm，10%~27%；1.18mm，8%~20%；0.6mm，5%~18%；0.075mm，0%~5%。
B) making cement stabilized macadam subbase
For corresponding with old road road structure, the low dosage cement stabilized macadam 17 of making thickness 15cm and the cement stabilized macadam 16 of thickness 36cm are as the closely knit subbase of semi-rigid material.Based on preventing and delayed reflex crack, stop the consideration of moisture penetration, at Pavement mosaic place, the steel that longitudinally overlays one deck width 450cm in subbase is moulded grid 11.
Cement stabilized macadam subbase adopts the form of construction work of a health moulding of layered rolling, to guarantee interlayer continuous whole.
C) Sub-sealing Course 10 is set
After cement stabilized macadam subbase construction, by clean surface cleaning, then spread heated bitumen Sub-sealing Course 10.
Sub-sealing Course heated bitumen spread quantity 1.2kg/m
2, spreading simple grain footpath pitch premixed macadam immediately after heated bitumen spread, spreading amount 6kg/m
2.
The preferred specification of simple grain footpath pitch premixed macadam is 5-10mm, and premixing bitumen content 0.35% adopts 70A pitch or modified bitumen.
D) the special flexible bulky grain bituminous concrete moxture drainage blanket 15 that gathers materials of planting of making
Prevent reflection crack in order to solve old road surface layer structure internal drainage problem, the extraordinary bulky grain of flexibility of the design making thickness 10cm bituminous concrete moxture drainage blanket 15 that gathers materials simultaneously.
The gather materials void content of bituminous concrete moxture of extraordinary bulky grain is 12%-18%, adopts 70A pitch or modified bitumen, design bitumen content scope 2.9% ~ 3.5%.The bulky grain asphalt macadam level of gathering materials is equipped with each particle diameter mineral aggregate by standard size sieve aperture percentage meter, and its grading limit is:
31.5mm，93%~100%；19mm，60%~75%；9.5mm，25%~38%；1.18mm，0~10%；0.075mm，0~3%。
E) making asphaltic road-mix surface course
The extraordinary bulky grain of making gathers materials after bituminous concrete moxture drainage blanket, according to protobitumen surface layer (upper asphalt surface course 12, medium pitch surface layer 13 and lower asphalt surface course 14) making dense bitumen compound, recovers asphalt surface course structure.Based on preventing and delayed reflex crack, stop the consideration of moisture penetration, in new-old pavement stitching portion, the monolateral Singed non-woven fabrics 9 of long filament of two-layer width 90cm is longitudinally set at the bottom of upper surface layer, evenly smear base joint grouting glue at old asphalt surface course sidewall.
Claims (5)
1. the enlarging of the old road based on a draining cracking resistance splicing construction, comprise asphalt surface course Ji Xin road, old road asphalt surface course, under the asphalt surface course of old road, be equipped with old road basic unit, it is characterized in that: under the asphalt surface course of new road, set gradually certain thickness flexible bituminisation Drainage Base, the closely knit subbase of semi-rigid material, graded broken stone drainage blanket, new road asphalt surface course and old road asphalt surface course splicing seam crossing, and the flexible bituminisation Drainage Base on new road, the closely knit subbase of semi-rigid material and old road basic unit splicing seam crossing are provided with the deck splicing step of certain width.
2. the enlarging of the old road based on draining cracking resistance splicing construction according to claim 1, is characterized in that: the old and new's Pavement mosaic place, and longitudinally in the closely knit subbase of semi-rigid material, be provided with one deck steel and mould grid, the width that steel is moulded grid is 300 ~ 600cm.
3. the enlarging of the old road based on draining cracking resistance splicing construction according to claim 1 and 2, is characterized in that: the old and new's Pavement mosaic place, is respectively arranged with in the upper surface layer bottom of asphalt surface course the monolateral Singed non-woven fabrics of long filament that width is 50 ~ 150cm.
4. the enlarging of the old road based on draining cracking resistance splicing construction according to claim 3, is characterized in that: the width of each deck splicing step is respectively: the each deck 15 ~ 20cm of asphalt surface course; Basic unit and subbase 50 ~ 75cm.
5. the enlarging of the old road based on draining cracking resistance splicing construction according to claim 3, is characterized in that:
Described flexible bituminisation Drainage Base adopts the extraordinary bulky grain bituminous concrete moxture drainage blanket that gathers materials, thickness 8 ~ 15cm;
The closely knit subbase of described semi-rigid material adopts cement or lime-flyash stabilization macadam, thickness 45 ~ 60cm;
Described graded broken stone drainage blanket is arranged between subbase and roadbed end face, adopts open gradation structure, thickness 15 ~ 20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836863.3U CN203741670U (en) | 2013-12-18 | 2013-12-18 | Old road extension splicing structure based on drainage and crack resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320836863.3U CN203741670U (en) | 2013-12-18 | 2013-12-18 | Old road extension splicing structure based on drainage and crack resistance |
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|---|---|
| CN203741670U true CN203741670U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320836863.3U Expired - Fee Related CN203741670U (en) | 2013-12-18 | 2013-12-18 | Old road extension splicing structure based on drainage and crack resistance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741569A (en) * | 2013-12-18 | 2014-04-23 | 山东省交通科学研究所 | Drainage crack resistance based old road expansion splicing structure and method |
| CN106065555A (en) * | 2016-08-03 | 2016-11-02 | 江西赣粤高速公路股份有限公司 | A kind of unilateral splicing construction for Widening of Freeway and method |
| CN107165022A (en) * | 2017-06-21 | 2017-09-15 | 杭州江润科技有限公司 | A kind of big thickness subbase construction method of High-cold regions highway widening reinforcement |
| CN107881858A (en) * | 2017-12-20 | 2018-04-06 | 东南大学 | A kind of new railway sub-grade surface structure and its laying method |
| CN114182595A (en) * | 2021-11-19 | 2022-03-15 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
-
2013
- 2013-12-18 CN CN201320836863.3U patent/CN203741670U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741569A (en) * | 2013-12-18 | 2014-04-23 | 山东省交通科学研究所 | Drainage crack resistance based old road expansion splicing structure and method |
| CN103741569B (en) * | 2013-12-18 | 2016-08-17 | 山东省交通科学研究院 | A kind of old road based on drainage crack resistance enlarging splicing construction and method |
| CN106065555A (en) * | 2016-08-03 | 2016-11-02 | 江西赣粤高速公路股份有限公司 | A kind of unilateral splicing construction for Widening of Freeway and method |
| CN107165022A (en) * | 2017-06-21 | 2017-09-15 | 杭州江润科技有限公司 | A kind of big thickness subbase construction method of High-cold regions highway widening reinforcement |
| CN107881858A (en) * | 2017-12-20 | 2018-04-06 | 东南大学 | A kind of new railway sub-grade surface structure and its laying method |
| CN114182595A (en) * | 2021-11-19 | 2022-03-15 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
| CN114182595B (en) * | 2021-11-19 | 2023-08-11 | 山东省交通科学研究院 | Construction method of long-life asphalt road |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20140730 Termination date: 20141218 |
|
| EXPY | Termination of patent right or utility model |