CN105926406B - A kind of joining method and structure on old road new in reorganization and expansion pavement construction - Google Patents
A kind of joining method and structure on old road new in reorganization and expansion pavement construction Download PDFInfo
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- CN105926406B CN105926406B CN201610276257.9A CN201610276257A CN105926406B CN 105926406 B CN105926406 B CN 105926406B CN 201610276257 A CN201610276257 A CN 201610276257A CN 105926406 B CN105926406 B CN 105926406B
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- 238000010276 construction Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008521 reorganization Effects 0.000 title claims abstract description 19
- 238000005304 joining Methods 0.000 title claims abstract description 16
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims abstract description 9
- 239000004568 cement Substances 0.000 claims abstract description 6
- 238000003801 milling Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000010426 asphalt Substances 0.000 claims description 17
- 238000009412 basement excavation Methods 0.000 claims description 16
- 239000011083 cement mortar Substances 0.000 claims description 12
- 239000004746 geotextile Substances 0.000 claims description 12
- 229920000728 polyester Polymers 0.000 claims description 12
- 238000004140 cleaning Methods 0.000 claims description 9
- 239000002689 soil Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000006052 feed supplement Substances 0.000 claims description 3
- 239000013505 freshwater Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 230000001934 delay Effects 0.000 claims 1
- 238000004945 emulsification Methods 0.000 claims 1
- 238000002789 length control Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000008569 process Effects 0.000 claims 1
- 239000002893 slag Substances 0.000 claims 1
- 230000002146 bilateral effect Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/187—Repairing bituminous covers, e.g. regeneration of the covering material in situ, application of a new bituminous topping
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The joining method and structure on the invention belongs to a kind of in reorganization and expansion pavement construction new old road, splicing position and the wheel load on new old road are staggeredly located setting.Old sub-surface, underlayment are connected using step pattern, to increase new and old roadbed contact area, enhance binding site frictional force.The construction of the old and new's supercrust utilizes anti-step pattern, can be by adjusting step width, and the flexible Pavement mosaic position that adjusts is in advantageous stress, avoids wheel path.Its gauge thickness of waterstop is arranged with place longitudinal seam face height, realizes the function of hermetic seal.Ribbed Bar mesh sheet is laid at the splicing position at the top of the underlayment of the cement stabilized macadam on new road, can improve that the position is anti-shearing and ability is drawn in bending resistance.The present invention can improve the bearing capacity and durability of the new old road joining quality and whole pavement engineering of reorganization and expansion pavement engineering, have method and simple in structure feasible, speed of application is fast, it is time saving and energy saving, construction cost is low, and construction quality is good, the advantage that road surface is anti-shearing and bending resistance drawing ability is strong.
Description
Technical field
The joining method and structure on the invention belongs to a kind of in reorganization and expansion pavement construction new old road.
Background technology
Now with expanding economy, vehicle it is increasing, the engineering of reorganization and expansion is carried out to original narrow, old highway
It is more and more.And to new old road Bonding Problem in reorganization and expansion pavement construction, it not can be well solved so far, there are the splicings of new old road
The problems such as position dense water is poor, construction is inconvenient, time-consuming and laborious, compactness is poor, and energy force difference is drawn in anti-shearing and bending resistance, it is main to show
Splice position between new old road and be longitudinally easy cracking, causes rainwater infiltration.And then cause spliced road surface differential settlement,
The diseases such as Moisture Damage, cracking, roadbed sideslip generate, and seriously affect the integrated engineering quality of reorganization and expansion highway.
Invention content
The purpose of the present invention is designing a kind of joining method and structure on old road new in reorganization and expansion pavement construction, the party is used
Method and structure can improve the bearing capacity and durability of the new old road joining quality and whole pavement engineering of reorganization and expansion pavement engineering, tool
There is method and simple in structure feasible, speed of application is fast, time saving and energy saving, and construction cost is low, and construction quality is good, and road surface is anti-shearing and anti-
The strong advantage of curved drawing ability.
For this reason, the construction method of the present invention, includes the following steps：
（1）The intensity of old road face hardened verge bench excavation, the old sub-surface, underlayment that are obtained according to detection is adopted respectively
With,
（a）When old sub-surface, underlayment intensity are up to state standards, wheel load position is avoided, main stage is taken
Rank excavation plan, basic step excavation plan are：From old road hardened verge graticule（Containing graticule）1.9 m of milling~2.1m to outside road,
Blacktop milling is fallen, is moved in the anticollision barrier of old road at curb graticule, milling is formed by depth outside the roads Nei Xiang of the road bottom of to
The step surface of three faulting of slab ends height of base baseplane, step surface width from top to bottom be respectively 39cm~42cm, 19cm~
22cm, 19cm~22cm form faulting of slab ends, and each step is longitudinally cut using cutting machine, at the 4th of milling to third step lower end
When terrace, if find the steady layer of water of remaining weakness on grey soil layer, weak steady layer of water need to be removed during milling, and do
Good construction note, sandwich of layers, the soft layer for being not allow for leaving in each step layer during milling lead to when widening section construction
It crosses and the horizontal slope that paves is turned up, or the mode of artificial feed supplement repairs sandwich of layers, soft layer, ensures the whole horizontal slope on road surface, the
It is extended down to old road kerb inward flange on the outside of four step surfaces, removes old road kerb；
（b）When old sub-surface, underlayment intensity are less than national standard, wheel load position is avoided, in basic step
The whole interior shifting of step is carried out on the basis of excavation plan to move in step entirety when underlayment is loose；When base is loose, and bottom
When base is intact, in order to avoid wheel load position, the whole interior shifting of step is also used, old road kerb is extended down on the outside of the 4th step surface
Inward flange removes old road kerb；
（2）New base course, underlayment and old road base, the corresponding splicing of underlayment,
After the completion of basic step excavation plan, the old and new's sub-base road, base's splicing, new sub-base road, base are first carried out
Thickness is constructed by design thickness and width, and width is connected with old road kerb outer edge, and specific implementation step case is as follows：
（a）Excavator cuts off former curb soil, until old sub-surface exposes fresh water from top to bottom along old road kerb outer edge
Steady face；
（b）The water of loading machine cleaning excision surely expects residue；
（c）It is artificial to carry out thin portion cleaning, section loose material is swept, soil easy to fall off is vibrated and removes, is lost after loading machine cleaning
Residue is stayed manually to clean out；
（d）Stitching portion ground is rolled with road roller, it is ensured that compacting；
（e）Cement mortar is spread on the side of stitching portion, the base level under side spreads cement mortar using artificial watering can and constructs, booth
Base level before paving machine is constructed with cement mortar spreader, is sprayed from top to bottom on institute's constructing structure layer side section, cement mortar
Length is dispensed to control before paver within 20 meters；
（f）In the base level that new, old road joins, 2m is set on the base level upper berth of handing-over along old road longitudinal joint lower end
The Ribbed Bar mesh sheet of wide, φ 12,20 × 20cm specifications, while water-swellable waterstop is set in adjacent step longitudinal surface,
Height is 15cm~19cm, thickness 5mm~7mm；
（g）It is laid with new sub-surface, the new base course of laying passes through with the longitudinal seam face of the respective layer of old road base
(water-swellable) sealing band connection sets the polyester geotextiles of 48cm~52cm wide at horizontal joint；
（3）The old and new's supercrust construction connection scheme and technique,
After new base course is constructed, carry out under new road, in, the construction of upper layer, it is each according to Design Requirement Drawing
Layer between reserve overlap joint step, new road cutting optimal by inside lane construction width to apart from old road correspondence step vertical plane 74cm~
At 78cm, face floor is formed inside lane construction width to correspondence step vertical plane 112cm~118cm apart from old road in new road
Anti- staircase structural model；
After the completion of the Defects Treatment of old road, carry out under new old road, in, the construction of upper layer, under the roads construction Qian Xianduixin,
In, layer Mian Ceng stitching positions trimming 9cm~11cm above, then carry out the splicing on new old road, each layer piece position brush
After emulsified asphalt, by sealing band connection, level connects in the longitudinal seam face of the new supercrust of laying and the respective layer of old supercrust
The polyester geotextiles of 48cm~52cm wide are set at seam, complete the concatenation construction of the old and new's supercrust.
It is a kind of realize the structure of the joining method on new old road in reorganization and expansion pavement construction include new old road underlayment,
Base's knead dough layer：
The splicing position on new old road and wheel load are staggeredly located setting；
Seam crossing between each layer of the underlayment on new old road and base and face layer forms the step pattern being staggered and connects；
Ribbed Bar mesh sheet is located at the splicing position at the top of the underlayment of the cement stabilized macadam on new road, with underlayment top
(water-swellable) waterstop is set on the longitudinal surface of the adjacent upper lateral part seam crossing in splicing position in portion；
The longitudinal seam face of the respective layer of the new base course and the old road base that are laid with by (water-swellable) sealing band connection,
The polyester geotextiles of 48cm~52cm wide are set at horizontal joint；
The new supercrust being laid with passes through sealing band connection, horizontal joint with the longitudinal seam face of the respective layer of old supercrust
Place sets the polyester geotextiles of 48cm~52cm wide.
The road surface on the new road cut open show structure from top to bottom and be the AC-13C modified asphalt layers of 4cm~5cm thickness, 6cm~
The water stability detritus of the AC-20C modified asphalt layers of 7cm thickness, the ATB-25 plain asphalts layer of 10cm~11cm thickness, 34cm~35cm thickness
The water stability detritus underlayment of base and 20cm~21cm thickness；
The road surface on the old road cuts open that show structure from top to bottom be the AC-13C of 4cm~5cm thickness overlayed on the face of old road
3cm~4cm of remaining wall after modified asphalt layer, the AC-20C modified asphalt layers of the 6cm~7cm newly spread after milling thickness, milling
The AC-30I plain asphalts layer of thick AC-25I plain asphalts layer, 7cm~8cm thickness, the water-stable gravel of 34cm~35cm thickness
With the water stability detritus underlayment of 20cm~21cm thickness.
The above method and structure have reached the purpose of the present invention.
The present invention can improve the new old road joining quality of reorganization and expansion pavement engineering and the bearing capacity of whole pavement engineering and resistance to
Long property has method and simple in structure feasible, and speed of application is fast, time saving and energy saving, and construction cost is low, and construction quality is good, and road surface is anti-
The advantage that shearing and bending resistance draw ability strong.With ratio conventional method of the invention and structure construction time contracting square 30%；Construction cost drops
Low 40%；Construction quality is good, and effects of energy conservation and environmental protection is good.
The present invention utilizes the excavation of the step pattern for water-stable gravel, returns paving concatenation construction and bituminous paving
Anti- step pattern return paving concatenation construction, by step width design adjustment, avoid Pavement mosaic position from being in wheel path etc.
Road surface stress least favorable region.At vertical (water-swellable) waterstop of new and old roadbed layer splicing position setting, face layer splicing position
Vertical (pitch) waterstop is set, it is convenient, fast, efficiently improve splicing position dense water and adhesive property.It is tying simultaneously
Reinforced mesh is set in structure layer, and ability is drawn in the anti-shearing and bending resistance for improving new old road stitching section position, is reduced differential settlement and is generated.
The final bearing capacity and durability for realizing the new old road joining quality for improving reorganization and expansion pavement engineering and whole pavement engineering.Practice
Show the present invention compared with traditional structure, road surface is anti-shearing and ability and bearing capacity and the strong 2 times or more of durability are drawn in bending resistance, has well
Using effect.
Description of the drawings
Fig. 1 is that the old road bilateral of the present invention spells wide design structure schematic diagram.
Fig. 2 is that the bilateral of the present invention spells wide structural schematic diagram.
Specific embodiment
As depicted in figs. 1 and 2, a kind of joining method on old road new in reorganization and expansion pavement construction.Include the following steps：
（1）Old road face hardened verge bench excavation.The intensity of the old sub-surface, underlayment that are obtained according to detection is adopted respectively
With：
（a）When old sub-surface, underlayment intensity are up to state standards, wheel load position is avoided, main stage is taken
Rank excavation plan.Base can be described as water-stable gravel 8, and underlayment can be described as water stability detritus underlayment 9.
Basic step excavation plan is：From old road hardened verge graticule（Containing graticule）1.9 m of milling~2.1m to outside road, will drip
Green supercrust milling is fallen.It is moved in the anticollision barrier of old road at curb graticule.Milling is formed by depth outside the roads Nei Xiang of road to underlayment
The step surface of three faulting of slab ends height of baseplane, step surface width from top to bottom be respectively 39cm~42cm, 19cm~22cm,
19cm~22cm forms faulting of slab ends.Each step is longitudinally cut using cutting machine.In milling to the 4th step surface of third step lower end
When, if find the steady layer of water of remaining weakness on grey soil layer, weak steady layer of water need to be removed during milling.And it carries out and applies
Work records, and is not allow for sandwich of layers, the soft layer left during milling in each step layer.When widening section construction, pass through tune
Height paves horizontal slope, or the mode of artificial feed supplement repairs sandwich of layers, soft layer, ensures the whole horizontal slope on road surface.4th
It is extended down to 3 inward flange of old road kerb on the outside of terrace, removes old road kerb.
（b）When old sub-surface, underlayment intensity are less than national standard, wheel load position is avoided, in basic step
The whole interior shifting of step is carried out on the basis of excavation plan.When underlayment is loose, step also whole interior shifting, i.e. three faulting of slab ends height
Step surface it is whole in move；When base is loose, and underlayment is intact, in order to avoid wheel load position, also use step whole
It moves in vivo.It is extended down to old road kerb inward flange on the outside of 4th step surface, removes old road kerb.
（2）New base course, underlayment and old road base, the corresponding splicing of underlayment.
After the completion of basic step excavation plan, the old and new's sub-base road, base's splicing are first carried out.New sub-base road, base
Thickness is constructed by design thickness and width, and width is connected with old road kerb outer edge, and specific implementation step case is as follows：
（a）Excavator cuts off former curb soil, until old sub-surface exposes fresh water from top to bottom along old road kerb outer edge
Steady face.
（b）The water of loading machine cleaning excision surely expects residue.
（c）It is artificial to carry out thin portion cleaning, section loose material is swept, soil easy to fall off is vibrated and removes, is lost after loading machine cleaning
Residue is stayed manually to clean out.
（d）Stitching portion ground is rolled with road roller, it is ensured that compacting.
（e）Cement mortar is spread on the side of stitching portion, the base level under side spreads cement mortar using artificial watering can and constructs, booth
Base level before paving machine is constructed with cement mortar spreader, is sprayed from top to bottom on institute's constructing structure layer side section, cement mortar
Length is dispensed to control before paver within 20 meters.
（f）In the base level that new, old road joins, 2m is set on the base level upper berth of handing-over along old road longitudinal joint lower end
The Ribbed Bar mesh sheet 2 of wide, φ 12,20 × 20cm specifications, while in adjacent step longitudinal surface setting (the best choosing of waterstop 1
Water-swellable waterstop), it is highly 15cm~19cm, thickness 5mm~7mm.
（g）It is laid with new sub-surface.The new base course being laid with passes through with the longitudinal seam face of the respective layer of old road base
Waterstop (most preferably selecting water-swellable waterstop) connects, and the polyester geotextiles 4 of 48cm~52cm wide are set at horizontal joint.
（3）The old and new's supercrust construction connection scheme and technique.
After new base course is constructed, carry out under new road, in, the construction of upper layer.It is each according to Design Requirement Drawing
Overlap joint step is reserved between layer.New road cutting optimal by inside lane construction width to the correspondence step vertical plane 74cm apart from old road~
At 78cm.Face floor is formed inside lane construction width to correspondence step vertical plane 112cm~118cm apart from old road in new road
Anti- staircase structural model.
After the completion of the Defects Treatment of old road, carry out under new old road, in, the construction of upper layer.Under the roads construction Qian Xianduixin,
In, layer Mian Ceng stitching positions trimming 9cm~11cm above, then carry out the splicing on new old road, each layer piece position brush
After emulsified asphalt, pitch (is most preferably selected in the new supercrust of laying and the longitudinal seam face of the respective layer of old supercrust by waterstop
Waterstop) it connects, the polyester geotextiles of 48cm~52cm wide are set at horizontal joint, complete the concatenation construction of the old and new's supercrust.It will
The kerbstone 31 newly spread is set in pavement edge.
The splicing position on the new old road and wheel load are staggeredly located setting.
The old sub-surface, underlayment are connected using step pattern, to increase new and old roadbed contact area, enhancing knot
Position frictional force is closed, ensures new and old roadbed layer effectively combination and globality.
The construction of the old and new's supercrust utilizes anti-step pattern, can flexibly adjust road by adjusting step width
Face splicing position is in advantageous stress, avoids wheel path.
The waterstop, gauge thickness 5mm are highly arranged with place longitudinal seam face height, realize that sealing stops
The function of water.
The Ribbed Bar mesh sheet is laid at the splicing position at the top of the underlayment of the cement stabilized macadam on new road,
It can improve that the position is anti-shearing and ability is drawn in bending resistance, delay and reduce the deformation at the position, crack, reduce differential settlement production
Overall performance that is raw, realizing protection, enhance base.
As depicted in figs. 1 and 2, a kind of to realize that the structure of the joining method on new old road in reorganization and expansion pavement construction includes
Underlayment, base's knead dough layer on new old road, wherein：
The splicing position on new old road and wheel load are staggeredly located setting.
Seam crossing between each layer of the underlayment on new old road and base and face layer forms the step pattern being staggered and connects.
Ribbed Bar mesh sheet is located at the splicing position at the top of the underlayment of the cement stabilized macadam on new road, with underlayment top
(water-swellable) waterstop is set on the longitudinal surface of the adjacent upper lateral part seam crossing in splicing position in portion.
The longitudinal seam face of the respective layer of the new base course and the old road base that are laid with by (water-swellable) sealing band connection,
The polyester geotextiles of 48cm~52cm wide are set at horizontal joint.
The new supercrust being laid with (most preferably selects pitch to stop with the longitudinal seam face of the respective layer of old supercrust by waterstop
Water band) it connects, the polyester geotextiles of 48cm~52cm wide are set at horizontal joint.
The road surface on the new road cut open show structure from top to bottom be 4cm~5cm thickness AC-13C modified asphalt layers 5；6cm~
The AC-20C modified asphalt layers 6 of 7cm thickness；The ATB-25 plain asphalts layer 7 of 10cm~11cm thickness；The water of 34cm~35cm thickness is surely broken
The water stability detritus underlayment 9 of ground mass layer 8 and 20cm~21cm thickness.
The road surface on the old road cuts open that show structure from top to bottom be the AC-13C of 4cm~5cm thickness overlayed on the face of old road
Modified asphalt layer 5；The AC-20C modified asphalt layers 6 of the 6cm~7cm thickness newly spread after milling；(old road) remaining wall after milling
The AC-25I plain asphalts layer 10 of 3cm~4cm thickness；AC-30I (old road) plain asphalt layer 11 of 7cm~8cm thickness；34cm~
The water stability detritus underlayment 9 of the water-stable gravel 8 and 20cm~21cm thickness of 35cm thickness.
The AC-13C modified asphalt layers of 4cm~5cm thickness are the upper surface of new old road layer.
It is located at the middle part of the corresponding polyester geotextiles for carrying out lid at the horizontal joint.
The method and structure of the present invention can be used for spelling in width the unilateral side on old road and bilateral, and width side under this invention is spelled in unilateral side
Method is constructed, therefore is not repeated.
In a word, the present invention can improve the bearing capacity of the new old road joining quality and whole pavement engineering of reorganization and expansion pavement engineering
And durability, there is method and simple in structure feasible, speed of application is fast, time saving and energy saving, and construction cost is low, and construction quality is good, road
The advantage that face is anti-shearing and bending resistance drawing ability is strong.
Claims (3)
1. a kind of joining method on old road new in reorganization and expansion pavement construction, it is characterised in that：Include the following steps,
（1）The intensity of old road face hardened verge bench excavation, the old sub-surface, underlayment that are obtained according to detection is respectively adopted,
（a）When old sub-surface, underlayment intensity are up to state standards, wheel load position is avoided, basic step is taken to open
Excavation case, basic step excavation plan are：From old road hardened verge graticule to outside road 1.9 m of milling~2.1m, by blacktop
Milling is fallen, and is moved in the anticollision barrier of old road at curb graticule, and milling is formed by depth outside the roads Nei Xiang of road to underlayment baseplane
The step surface of three faulting of slab ends height, step surface width are respectively from top to bottom 39cm~42cm, 19cm~22cm, 19cm~22cm
Faulting of slab ends is formed, each step is longitudinally cut using cutting machine, in four step surface of the milling to third step lower end, if finding ash
On soil layer when the steady layer of water of remaining weakness, weak steady layer of water need to be removed during milling, and carry out construction note, milling
It is not allow for the sandwich of layers left, soft layer in each step layer in the process, when widening section construction, by the way that the horizontal slope that paves is turned up,
Or the mode of artificial feed supplement repairs sandwich of layers, soft layer, ensures the whole horizontal slope on road surface, is extended down on the outside of the 4th step surface
Old road kerb inward flange, removes old road kerb；
（b）When old sub-surface, underlayment intensity are less than national standard, wheel load position is avoided, in basic bench excavation
The whole interior shifting of step is carried out on the basis of scheme to move in step entirety when underlayment is loose；When base is loose, and underlayment
When intact, in order to avoid wheel load position, the whole interior shifting of step also used, old road kerb inner edge is extended down on the outside of the 4th step surface
Edge removes old road kerb；
（2）New base course, underlayment and old road base, the corresponding splicing of underlayment,
After the completion of basic step excavation plan, the old and new's sub-base road, base's splicing, new sub-base road, groundwork thickness are first carried out
It constructs by design thickness and width, width is connected with old road kerb outer edge, and specific implementation step case is as follows：
（a）Excavator cuts off former curb soil from top to bottom along old road kerb outer edge, until old sub-surface exposing fresh water is steady
Face；
（b）The water of loading machine cleaning excision surely expects residue；
（c）It is artificial to carry out thin portion cleaning, section loose material is swept, soil easy to fall off is vibrated and removes, is left after loading machine cleaning residual
Slag is manually cleaned out；
（d）Stitching portion ground is rolled with road roller, it is ensured that compacting；
（e）Cement mortar is spread on the side of stitching portion, the base level under side spreads cement mortar using artificial watering can and constructs, paver
Preceding base level is constructed with cement mortar spreader, is sprayed from top to bottom on institute's constructing structure layer side section, and cement mortar dispenses
Length control is before paver within 20 meters；
（f）In the base level that new, old road joins, 2m wide, φ are set on the base level upper berth of handing-over along old road longitudinal joint lower end
12, the Ribbed Bar mesh sheet of 20 × 20cm specifications, while waterstop is set in adjacent step longitudinal surface, highly for 15cm~
19cm, thickness 5mm~7mm；
（g）It is laid with new sub-surface, the new base course of laying passes through sealing with the longitudinal seam face of the respective layer of old road base
Band connection sets the polyester geotextiles of 48cm~52cm wide at horizontal joint；
（3）The old and new's supercrust construction connection scheme and technique,
After new base course is constructed, carry out under new road, in, the construction of upper layer, according to each layer of Design Requirement Drawing it
Between reserve overlap joint step, new road cutting optimal is by inside lane construction width to correspondence step vertical plane 74cm~78cm apart from old road
Locate, face floor forms anti-platform inside lane construction width to correspondence step vertical plane 112cm~118cm apart from old road in new road
Hierarchic structure；
After the completion of the Defects Treatment of old road, carry out under new old road, in, the construction of upper layer, under the roads construction Qian Xianduixin, in, on
Face layer Mian Ceng stitching position trimming 9cm~11cm, then carry out the splicing on new old road, and emulsification drip is brushed at the piece position of each layer
After blueness, the longitudinal seam face of the new supercrust of laying and the respective layer of old supercrust is set at horizontal joint by sealing band connection
The polyester geotextiles of 48cm~52cm wide complete the concatenation construction of the old and new's supercrust；
The splicing position on the new old road and wheel load are staggeredly located setting；
The old sub-surface, underlayment are connected using step pattern, to increase new and old roadbed contact area, enhance engaging portion
Position frictional force ensures new and old roadbed layer effectively combination and globality；
The construction of the old and new's supercrust utilizes anti-step pattern, can be by adjusting step width, and the flexible road surface that adjusts is spelled
Socket part position is in advantageous stress, avoids wheel path；
The waterstop, gauge thickness 5mm are highly arranged with place longitudinal seam face height, realize hermetic seal
Function.
2. a kind of joining method on old road new in reorganization and expansion pavement construction as described in claim 1, it is characterised in that：Institute
The Ribbed Bar mesh sheet stated is laid at the splicing position at the top of the underlayment of the cement stabilized macadam on new road, can improve the portion
Position is anti-shearing to draw ability with bending resistance, delays and reduces the deformation at the position, crack, reduces differential settlement and generate, realization protection,
Enhance the overall performance of base.
3. a kind of structure packet of joining method that realizing a kind of old road new in reorganization and expansion pavement construction described in claim 1
Include underlayment, base's knead dough layer on new old road, it is characterised in that：
Seam crossing between each layer of the underlayment on new old road and base and face layer forms the step pattern being staggered and connects；
Ribbed Bar mesh sheet is located at the splicing position at the top of the underlayment of the cement stabilized macadam on new road, at the top of underlayment
Splice and sets waterstop on the longitudinal surface of the adjacent upper lateral part seam crossing in position；
The road surface on the new road cut open show structure from top to bottom be 4cm~5cm thickness AC-13C modified asphalt layers, 6cm~7cm thickness
AC-20C modified asphalt layers, the ATB-25 plain asphalts layer of 10cm~11cm thickness, 34cm~35cm thickness water-stable gravel
With the water stability detritus underlayment of 20cm~21cm thickness；
The road surface on the old road cut open show structure from top to bottom be overlayed on the face of old road 4cm~5cm thickness AC-13C modification
3cm~4cm thickness of remaining wall after bitumen layer, the AC-20C modified asphalt layers of the 6cm~7cm newly spread after milling thickness, milling
AC-25I plain asphalts layer, the AC-30I plain asphalts layer of 7cm~8cm thickness, 34cm~35cm thickness water-stable gravel and
The AC-13C modified asphalt layers of the water stability detritus underlayment of 20cm~21cm thickness, 4cm~5cm thickness are the upper surface of new old road
Layer, the middle part of the corresponding polyester geotextiles for carrying out lid is located at the horizontal joint.
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| CN106958178A (en) * | 2017-05-09 | 2017-07-18 | 交通运输部公路科学研究所 | Widen splicing pavement structure and construction method in the old road of highway weight car separated running |
| CN107165022B (en) * | 2017-06-21 | 2019-04-16 | 西安市市政建设(集团)有限公司 | A kind of big thickness subbase construction method of High-cold regions highway widening reinforcement |
| CN108118574B (en) * | 2017-12-28 | 2019-12-17 | 警通建设（集团）有限公司 | Concrete pavement construction process |
| CN110552281B (en) * | 2019-09-02 | 2022-01-14 | 重庆工程职业技术学院 | Asphalt pavement defect repairing method and reinforced workpiece |
| 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 |
| CN110820455A (en) * | 2019-11-27 | 2020-02-21 | 江西省公路桥梁工程有限公司 | Construction process for lapping and expanding roadbed of asphalt concrete highway |
| CN110965423A (en) * | 2019-12-17 | 2020-04-07 | 中交路桥华北工程有限公司 | Anti-crack construction method for asphalt pavement splicing |
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| CN111691258B (en) * | 2020-06-03 | 2021-10-01 | 安徽华仁路桥工程有限公司 | Construction process of ATB asphalt macadam foundation |
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