CN104988827A - Old and new road overlapped connecting method - Google Patents
Old and new road overlapped connecting method Download PDFInfo
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- CN104988827A CN104988827A CN201510318446.3A CN201510318446A CN104988827A CN 104988827 A CN104988827 A CN 104988827A CN 201510318446 A CN201510318446 A CN 201510318446A CN 104988827 A CN104988827 A CN 104988827A
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Abstract
The invention relates to an old and new road overlapped connecting method. The method comprises the steps that 1, weeds on an old roadbed slope and side ditches are removed, loosened soil which is located on the old roadbed slope surface layer and is not thinner than 50 cm is removed, n inward-inclined steps are excavated in the slope obtained after removal is performed, and the bottom face of the step on the bottommost layer is the lower surface of the old roadbed; 2, the upper surface of the newly-built road segment roadbed is flushed to the upper surface of the old roadbed, a layer of geogrids are laid on the upper surfaces of the new and old roadbeds, and road materials are laid to form an old and new road overlapped connecting layer; 3, geogrids are laid on the steps and the old and new roadbed overlapped connecting layer from bottom to top, and road materials are laid; 4, grooves are cut along the length of an old and new road overlapped connecting top face seam, then, heated asphalt is poured into the grooves, and an anti-cracking patch is laid at the seam along the length of the seam; and 5, broom-finish treatment is adopted on the top face of the step on the topmost face, and the pavement surface layer is laid after a remaining sandwich layer is eliminated. According to the method, new and old pavements form the cooperative bearing whole, and cracks and damage are avoided.
Description
Technical field
The present invention relates to a kind of road marching method, especially relate to new and old road bridging method.
Background technology
Along with the planning in city, the construction of Xincheng District, the transformation of old town, municipal rebuilding old road widening project gradually more gets up.But thing followed problem also embodies.Because rebuilding old road is widened, new and old road overlap joint becomes the problem of the most important thing of town road.
There is the difference in structure and intensity due to new, old road, Yi Jixin, the differential settlement of old road and the continuous action of vehicular load, often cause new, old pavement joining place generation road disease.In addition, original old Lu Duowei does the Drainage Design of road structure interlayer, adds that the drying shrinkage of the new and old material of sub-surface joining place is different with temperature contracting characteristic, certainly will cause the generation of longitudinal crack.
For the linking of old pavement (cement concrete composite asphalt pavement) and newly-built widening pavement (semi-rigid asphalt pavement), because old the road cement concrete pallet rank milling difficulty of construction is comparatively large, the longitudinal section in current old road generally keeps former vertical cross section.This form of structure causes joining place construction machinery to be not easy to work, makes convergence part degree of compaction not enough; Simultaneously due to the existence of straight joint from bottom to up, road structure internal water cannot be got rid of, and road structure globality is poor.
Newly, the linking of old pavement design is the emphasis of reconstruction and extension project, especially the difficult point be connected in emphasis especially of Deteriorated concrete pavement composite asphalt pavement and semi-rigid asphalt pavement.
At present, mainly there is following problem in linking that is new, old pavement:
1, due to new, that old pavement is connected material behavior difference, often produce straight joint at joining place, can not discharge smoothly once old road intermediary water and rainwater infiltrate deck along overlapping the slot, then easily cause bottom basic unit road diseases such as coming to nothing, sink in road surface; 2, new, old pavement seam crossing does not have the ability preventing reflection crack.
Summary of the invention
For the problems referred to above that prior art exists, the object of this invention is to provide a kind of new and old road bridging method, make new, old pavement form a cooperative bearing entirety, avoid cracking damage.
For achieving the above object, the present invention adopts following technical scheme: new and old road bridging method, comprises the steps:
S1: remove the weeds on old road roadbed side slope, gutter, removes top layer, slope, old roadside and is not less than loosening the soil of 50cm, and the side slope after removing scrapes out intilted n step, and the bench floor of basecoat is the soffit of old road roadbed;
S2: the upper surface flush of newly-built section roadbed and old road roadbed, lays one deck geo-grid at the upper surface of newly-built section roadbed and old road roadbed;
S3: establish i=1;
S4: lay road materials on reinforced two-way steel-plastic geo-grid and newly-built section roadbed, the height highly equaling i-th step from bottom to top laid by road materials, forms i-th, new and old road bonding layer;
S4: lay the reinforced two-way steel-plastic geo-grid of one deck at i-th bonding layer and the upper surface of the i-th+1 step from bottom to top, and then lay road materials at the upper surface of i-th bonding layer and reinforced two-way steel-plastic geo-grid and the i-th+1 step, the height highly equaling the i-th+1 step from bottom to top laid by road materials, forms the i-th+1, new and old road bonding layer;
S5: make i=i+1;
S6: as i>n, perform next step, otherwise return step S4;
S7: in newly-built section, old road overlap joint end face seam crossing along the cutting of seam length direction, then in groove, fill with heated bitumen, and seam crossing along seam length direction lay anti-splitting paster;
S8: take wharf's pavement quality at the end face of the n-th step, after eliminating the sandwich of layers left over, road surface pavement surface layer.
As optimization, height, the width of n step described in described step S1 are all equal with introversion degree.
As optimization, the wide 1.2m of described each step, high 0.8m, step introversion 3%.
As optimization, in described step S2, the vertical or cross directional stretch yield force of geo-grid is not less than 50kN/m, and elongation at yield rate is not more than 3%.
As optimization, be also included in before newly-built section and old road overlap, building of newly-built section, step comprises:
1) surveying setting-out, determines width and the length in newly-built section, then clears up, and is preparation place, newly-built section;
2) soil excavation, determines after the width and length building new section through step 1), excavates downwards in the place determined;
3) banket, and roll the roadbed that compacting forms newly-built section;
4) road materials is layered on the roadbed in newly-built section, forms road surface.
As optimization, in described step 3), after banketing, when soil moisture in layer ± 1%, open at roadbed the place of pedaling with more than 12t tandem roller or vibratory roller immediately and roll.
Relative to prior art, tool of the present invention has the following advantages:
1, on old road, form the step of n floor introversion, newly-built section and old road layering back-pressure are overlapped, cut down vehicle to the weight of new, old road joining place and destruction, adopt the step of introversion to add the frictional force of newly-built section and step simultaneously, effectively reduce the crack width of the contraction in newly-built section, slippage and lap-joint.
2, by arranging reinforced two-way steel-plastic geo-grid on new, old road at the lap position of each step, new, old road is made to become to be integrated with the road materials being laid on each step, guarantee new, old pavement cooperative bearing, be conducive to the cooperative bearing of new, old pavement and reduce the crack of new-old pavement joining place.
3, at the splicing seams end face cutting of new, old road, filling heated bitumen, be effectively filled with the overlapping the slot because new, old pavement material property difference are formed, ooze under preventing moisture.
4, lay anti-splitting paster at seam crossing along seam length direction, greatly strengthen antireflection ability, avoid old road surface structure intermediary water or rainwater to enter deck road pavement structure by overlapping the slot and cause damage, slow down the generation of joining place reflection cracking in a pavement.
Accompanying drawing explanation
The section structure schematic diagram of new, the Jiu Lu lap-joint of Fig. 1-complete according to the method for the invention.
In figure, 1-newly-built section structure, the old line structure of 2-, 3-geo-grid.
Detailed description of the invention
In describing the invention, it will be appreciated that, term " length ", " width ", " highly ", " on ", D score, " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is less than second feature.
Below the present invention is described in further detail.
See Fig. 1, a kind of new and old road bridging method, comprises the steps:
The first step: building of newly-built section, step comprises:
1) surveying setting-out, determines width and the length in newly-built section, then clears up, and is preparation place, newly-built section;
2) soil excavation, determines after the width and length building new section through step 1), excavates downwards in the place determined;
A) soil excavation is based on mechanical equivalent of light excavation, and hand excavation coordinates;
B) soil layer of the above 20cm of absolute altitude, adopts hand excavation, cleaning, smooth;
C) open pedal cross dimensions must accurately, straight, without landslide, without ponding, no-sundries;
D) reasonable arrangement sequence of excavation, prevents mistake from digging or backbreaks;
3) banket, and roll the roadbed that compacting forms newly-built section; (as surface moisture is not enough, should sprinkle water in right amount) when soil layer is in optimum moisture content ± 1%, open at roadbed the place of pedaling with more than 12t tandem roller or vibratory roller immediately and carry out rolling 6-8 time.Till rolling the compactness (can determine according to actual road conditions) being performed until requirement.Keep soil layer moistening when rolling, as surface moisture is lost too fast, mend in time and spill a small amount of water.As found the phenomenon such as " playing soft ", peeling in rolling, opening in time and again changing compacting again of banketing, making it reach quality standards.
4) road materials is layered on the roadbed in newly-built section, forms road surface.Newly-built section is made up of multiple active section, in actual condition, active section segmentation one by one completes, the overlap of adjacent two active sections adopts docking form, roll end the last period and become a slope, after special time before (rule of thumb determining, can be the such as second day) virgin material that paves, end slope is excavated, and scrapes out a laterally vertical section.
Second step:
S1: remove the weeds on old road roadbed side slope, gutter, removes top layer, slope, old roadside and is not less than loosening the soil of 50cm, and the side slope after removing scrapes out intilted n step, and the bench floor of basecoat is the soffit of old road roadbed; The height of a described n step, width and introversion degree can equal also can be unequal, in order to the height of an easy construction n step, width are preferably equal with introversion degree, particularly, the wide 1.2m of each step, high 0.8m, step introversion 3%;
S2: the upper surface flush of newly-built section roadbed and old road roadbed, one deck geo-grid is laid at the upper surface of newly-built section roadbed and old road roadbed, this geo-grid is reinforced two-way steel-plastic geo-grid, and it is indulged or cross directional stretch yield force is not less than 50kN/m, and elongation at yield rate is not more than 3%;
S3: establish i=1;
S4: lay road materials on reinforced two-way steel-plastic geo-grid and newly-built section roadbed, the height highly equaling i-th step from bottom to top laid by road materials, forms i-th, new and old road bonding layer, (Specific construction order is ground behind first underground);
S4: lay the reinforced two-way steel-plastic geo-grid of one deck at i-th bonding layer and the upper surface of the i-th+1 step from bottom to top, and then lay road materials at the upper surface of i-th bonding layer and reinforced two-way steel-plastic geo-grid and the i-th+1 step, the height highly equaling the i-th+1 step from bottom to top laid by road materials, forms the i-th+1, new and old road bonding layer;
S5: make i=i+1;
S6: as i>n, perform next step, otherwise return step S4;
S7: in newly-built section, old road overlap joint end face seam crossing along the cutting of seam length direction, then in groove, fill with heated bitumen, and seam crossing along seam length direction lay anti-splitting paster;
S8: take wharf's pavement quality at the end face of the n-th step, after eliminating the sandwich of layers left over, road surface pavement surface layer.
Step S7 and S8 opens to pedal to take stubble, making earth grille, do surface construction (build earth grille to have through, the two-way very high tensile strength of latitude and lower elongation per unit length, and there is high temperature resistant, the resistance to low premium properties such as cold, anti-aging, corrosion-resistant) again.
For reducing the relative settlement between new-old concrete bond, below original ground and roadbed bottom surface, respectively lay the reinforced two-way steel-plastic geo-grid of one deck for 30 centimetres, its vertical (horizontal stroke) is not less than 50kN/m to tensile yield power, and elongation at yield rate is not more than 3%.When roadbed filling height is greater than 4 meters, more than original ground, 1 meter of adds one deck steel plastic geogrid.
When new, old road overlapping widths is greater than 2m, the geo-grid at the place of 30cm below roadbed extends into old road 2m; When new and old road overlapping widths is less than 2m, then extension width negative lap width.Old road abolish after dregs be transported to spoil ground spoir.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. new and old road bridging method, is characterized in that, comprise the steps:
S1: remove the weeds on old road roadbed side slope, gutter, removes top layer, slope, old roadside and is not less than loosening the soil of 50cm, and the side slope after removing scrapes out intilted n step, and the bench floor of basecoat is the soffit of old road roadbed;
S2: the upper surface flush of newly-built section roadbed and old road roadbed, lays one deck geo-grid at the upper surface of newly-built section roadbed and old road roadbed;
S3: establish i=1;
S4: lay road materials on reinforced two-way steel-plastic geo-grid and newly-built section roadbed, the height highly equaling i-th step from bottom to top laid by road materials, forms i-th, new and old road bonding layer;
S4: lay the reinforced two-way steel-plastic geo-grid of one deck at i-th bonding layer and the upper surface of the i-th+1 step from bottom to top, and then lay road materials at the upper surface of i-th bonding layer and reinforced two-way steel-plastic geo-grid and the i-th+1 step, the height highly equaling the i-th+1 step from bottom to top laid by road materials, forms the i-th+1, new and old road bonding layer;
S5: make i=i+1;
S6: as i>n, perform next step, otherwise return step S4;
S7: in newly-built section, old road overlap joint end face seam crossing along the cutting of seam length direction, then in groove, fill with heated bitumen, and seam crossing along seam length direction lay anti-splitting paster;
S8: take wharf's pavement quality at the end face of the n-th step, after eliminating the sandwich of layers left over, road surface pavement surface layer.
2. new and old road as claimed in claim 1 bridging method, is characterized in that, height, the width of n step described in described step S1 are all equal with introversion degree.
3. new and old road as claimed in claim 2 bridging method, is characterized in that, the wide 1.2m of described each step, high 0.8m, step introversion 3%.
4. new and old road as claimed in claim 1 bridging method, is characterized in that, in described step S2, the vertical or cross directional stretch yield force of geo-grid is not less than 50kN/m, and elongation at yield rate is not more than 3%.
5. the new and old road bridging method as described in any one of claim 1-4, is characterized in that, be also included in before newly-built section and old road overlap, building of newly-built section, step comprises:
1) surveying setting-out, determines width and the length in newly-built section, then clears up, and is preparation place, newly-built section;
2) soil excavation, determines after the width and length building new section through step 1), excavates downwards in the place determined;
3) banket, and roll the roadbed that compacting forms newly-built section;
4) road materials is layered on the roadbed in newly-built section, forms road surface.
6. new and old road as claimed in claim 5 bridging method, is characterized in that, in described step 3), after banketing, when soil moisture in layer ± 1%, opens the place of pedaling immediately roll with more than 12t tandem roller or vibratory roller at roadbed.
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| CN201510318446.3A CN104988827A (en) | 2015-06-11 | 2015-06-11 | Old and new road overlapped connecting method |
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| CN201510318446.3A CN104988827A (en) | 2015-06-11 | 2015-06-11 | Old and new road overlapped connecting method |
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| CN106480800A (en) * | 2016-10-27 | 2017-03-08 | 上海市政工程设计研究总院（集团）有限公司 | A kind of crack stopper based on optical fiber sensing technology and method |
| CN106480799A (en) * | 2016-10-19 | 2017-03-08 | 长沙理工大学 | Pavement mosaic method and structure suitable for Old cement concrete reorganization and expansion |
| CN106968219A (en) * | 2017-04-17 | 2017-07-21 | 中国农业大学 | A kind of the old and new's dyke joint portion ruggedized construction and its application |
| CN107119522A (en) * | 2017-06-22 | 2017-09-01 | 中国建筑土木建设有限公司 | New and old roadbed connection structure and construction method |
| CN107178018A (en) * | 2017-06-13 | 2017-09-19 | 江苏旭辰交通科技发展有限公司 | A kind of new old asphalt pavement lapping construction method and bridging arrangement |
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| CN110644324A (en) * | 2019-10-11 | 2020-01-03 | 中交路桥北方工程有限公司 | Splicing construction method for reconstructing and expanding new road and old road |
| CN110924262A (en) * | 2019-12-03 | 2020-03-27 | 武汉市武昌市政建设(集团)有限公司 | New and old road surface base course overlap joint structure |
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| CN111485463A (en) * | 2020-04-26 | 2020-08-04 | 中铁二十三局集团第三工程有限公司 | Roadbed splicing construction method in expressway reconstruction and expansion |
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| CN112064435A (en) * | 2020-09-22 | 2020-12-11 | 陕西省交通投资集团有限公司 | Lap joint construction process for asphalt concrete highway extension |
| CN113605161A (en) * | 2021-05-27 | 2021-11-05 | 中铁九局集团第一建设有限公司 | Roadbed splicing method for highway extension |
| CN113642083A (en) * | 2021-08-25 | 2021-11-12 | 中交路桥北方工程有限公司 | Special-shaped splicing design method for new and old roads |
| CN113652923A (en) * | 2021-08-20 | 2021-11-16 | 广东省高速公路有限公司开阳扩建管理处 | Splicing method for rebuilding and expanding new and old road surfaces |
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| CN113642083A (en) * | 2021-08-25 | 2021-11-12 | 中交路桥北方工程有限公司 | Special-shaped splicing design method for new and old roads |
| CN113642083B (en) * | 2021-08-25 | 2024-06-11 | 中交路桥建设有限公司 | Abnormal splicing design method for new road and old road |
| 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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