CN110924262A - New and old road surface base course overlap joint structure - Google Patents
New and old road surface base course overlap joint structure Download PDFInfo
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- CN110924262A CN110924262A CN201911222682.XA CN201911222682A CN110924262A CN 110924262 A CN110924262 A CN 110924262A CN 201911222682 A CN201911222682 A CN 201911222682A CN 110924262 A CN110924262 A CN 110924262A
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- 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
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- 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
- E01C3/00—Foundations for pavings
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- 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
- E01C2201/00—Paving elements
- E01C2201/16—Elements joined together
- E01C2201/167—Elements joined together by reinforcement or mesh
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Abstract
The invention relates to a new and old pavement base course lap joint structure, which relates to the technical field of road traffic engineering construction and comprises the following components: a roadbed, an old road surface main body and a new road surface main body; the old road surface main body and the new road surface main body are arranged on the roadbed, the old road surface main body comprises an old road supporting layer and an old road surface layer, a first step is dug on the end surface of the old road supporting layer, a second step is formed between the end surface of the old road supporting layer and the end surface of the old road surface layer, and a third step is dug on the end surface of the old road surface layer; the new pavement body includes: the novel roadbed layer, the novel roadbed layer and the novel pavement layer, the upper surface of the novel roadbed layer flushes with the bottom surface of first step, the laying of the novel roadbed layer is on the upper surface of the novel roadbed layer, the bottom surface of first step, an expansion joint is left between the terminal surface of the novel roadbed layer and the side of first step, the upper surface of the novel roadbed layer is laid on the novel pavement layer, and the terminal surface of the novel pavement layer is laminated with the terminal surface of old pavement layer. The invention has the effect that gaps are not easy to generate at the joints of new and old pavements.
Description
Technical Field
The invention relates to the technical field of road traffic engineering construction, in particular to a new and old pavement base layer lap joint structure.
Background
With the development of social economy, the traffic volume of expressways is increasingly increased, the traffic volume of partial expressway pavements reaches saturation, and the congestion phenomenon is serious.
The Chinese patent with the publication number of CN107178018A is retrieved and discloses a new and old asphalt pavement lap joint structure, which comprises an old pavement, a new pavement, modified hot asphalt, polyester glass fiber cloth and anti-crack stickers, wherein the old pavement comprises an old pavement base layer and an old pavement surface layer, and the edge of the old pavement is provided with a step-shaped first lap joint surface; the new pavement comprises a new pavement base layer and a new pavement surface layer, and the edge part of the new pavement is provided with a second lapping surface matched with the first lapping surface; the modified hot asphalt covers the side surface of the first lap joint surface; the polyester glass fiber cloth is laid above the joint of the old pavement base layer and the new pavement base layer; the anti-cracking paste is laid above the joint of the old pavement surface layer and the new pavement surface layer.
The above prior art solutions have the following drawbacks: because there is not the gap between old road surface course and the new road surface course, and the main material of old road surface course and new road surface course still is the concrete, and when hot weather or cold weather, the concrete can have expend with heat and contract with cold the characteristic, so can directly lead to new and old road surface seam crossing to produce the gap easily, so wait to improve.
Disclosure of Invention
The invention aims to provide a new and old pavement base course lapping structure which has the advantage that gaps are not easy to generate at joints of new and old pavements in hot days or cold days.
The above object of the present invention is achieved by the following technical solutions: a new and old pavement base course lap joint structure comprising: a roadbed, an old road surface main body and a new road surface main body;
the old road surface main body and the new road surface main body are arranged on the roadbed, the old road surface main body comprises an old road supporting layer and an old road surface layer which are sequentially paved from bottom to top, a first step is dug on the end surface of the old road supporting layer, a second step is formed between the end surface of the old road supporting layer and the end surface of the old road surface layer, a third step is dug on the end surface of the old road surface layer, and the first step, the second step and the third step are gradually increased;
the new pavement body includes: the novel road surface layer, novel road supporting layer and novel road surface layer, novel road supporting layer is laid by the concrete and is formed, the upper surface of novel road surface layer with the bottom surface of first step flushes, laying of novel road supporting layer in the upper surface of novel road surface layer on the bottom surface of first step, the terminal surface of novel road supporting layer with leave the expansion joint between the side of first step, the upper surface of novel road supporting layer with the bottom surface of second step flushes, novel road surface layer is laid in the upper surface of novel road supporting layer, the terminal surface of novel road surface layer with the terminal surface of old road surface layer laminates mutually, the upper surface of novel road surface layer with the upper surface of old road surface layer flushes.
Through adopting above-mentioned technical scheme, the design of the tertiary step of old road surface main part terminal surface makes things convenient for the new road surface main part of successive layer construction at the back, is constructing the in-process of new road supporting layer in addition, can reserve out the expansion joint very conveniently, and when the concrete took place expend with heat and contract with cold under hot day or cold weather, the expansion joint can prevent effectively that new and old road surface seam crossing from producing the gap, and new road surface layer can cover the expansion joint moreover, avoids the expansion joint directly to expose the road surface.
The invention is further arranged that the width of the expansion joint is 15-25 mm.
Through adopting above-mentioned technical scheme, if the expansion joint is less than 15 millimeters, probably can't satisfy the expend with heat and contract with cold deformation size of concrete to lead to new and old road surface seam department still to produce the gap easily, and if the expansion joint is greater than 25 millimeters, then the inside of this new and old road surface seam department has bigger cavity, when load equipment traveles on the road surface, presses the expansion joint into the form of collapsing easily, restores also more troublesome, so the expansion joint of above-mentioned width size design is more reasonable.
The invention is further arranged such that the new roadbed layer comprises: the lower base layer and the upper base layer are formed by laying 5% cement macadam, the lower base layer and the upper base layer are manufactured by two-time construction, the end face of the old road supporting layer is arranged to be a serrated face, and the serrated face is in contact with the end face of the lower base layer and the end face of the upper base layer.
By adopting the technical scheme, the new roadbed layer is generally thicker, so that the new roadbed layer is divided into the lower roadbed layer and the upper roadbed layer for two times of construction, and the lower roadbed layer and the upper roadbed layer are compacted respectively in the two construction processes, so that the new roadbed layer with the double-layer structure is firmer, and the construction difficulty is reduced because the thickness is reduced in each time of construction; the 5% cement macadam is prepared by mixing cement and macadam according to a corresponding proportion and stirring, the materials are convenient to obtain, the preparation is convenient, and the cost is low; due to the design of the sawtooth surfaces, the contact area of the end surfaces of the old road supporting layer can be increased, so that the contact area between the new road base layer and the end surfaces of the old road supporting layer is greatly increased, the connection firmness between the new road base layer and the end surfaces of the old road supporting layer is higher, and the stability of the joint between the new road surface and the old road surface is further improved.
The invention is further arranged that the thickness of the lower base layer is between 170 and 190 mm, and the thickness of the upper base layer is between 170 and 190 mm.
By adopting the technical scheme, the lower base layer and the upper base layer with the thickness and the size are lower in construction cost and raw material cost, and higher in structural strength.
The invention is further provided that the thickness of the new road supporting layer is between 210 and 230 mm, and the bending tensile strength of the new road supporting layer is greater than or equal to 4.5 MPa.
Through adopting above-mentioned technical scheme, the new road supporting layer of above-mentioned design, not only structural strength is high, non-deformable damages, and construction cost, raw and other materials cost are lower moreover.
The invention is further arranged in such a way that a reinforcement cage is embedded in the part of the new road supporting layer above the first step.
Through adopting above-mentioned technical scheme, the new road supporting layer is made by the concrete, and itself has good compressive capacity, and the reinforcing bar frame cage can promote the tensile capacity of the new road supporting layer corresponding part to can avoid as far as possible by the expend with heat and contract with cold phenomenon that hot weather or cold weather arouse, further prevent new and old road surface seam crossing production gap.
The invention is further set that the lower surface of the reinforcement cage is welded with a steel plate, and the lower surface of the steel plate is welded with an anchor rod inserted into the old road supporting layer.
Through adopting above-mentioned technical scheme, the stock stretches into the interior difficult roll-off of old way supporting layer, has the resistance to plucking effect, and the steel sheet is again connected stock and reinforcing bar frame cage as an organic whole, so connect more firmly between new way supporting layer and the old way supporting layer, has strengthened the firm in connection nature of new and old road surface seam crossing.
The invention is further arranged that the new road surface layer comprises, from bottom to top, sequentially laid: lower surface course, first emulsified asphalt adhesive linkage and top surface course, the terminal surface of surface course down with the side of second step is laminated mutually, and emulsified asphalt lays in the upper surface of surface course down form on the bottom surface of third step first emulsified asphalt adhesive linkage, the top surface lay in on the first emulsified asphalt adhesive linkage, the terminal surface of top surface course with the side of third step is laminated mutually.
Through adopting above-mentioned technical scheme, the lower surface course and the upper surface course layering construction of new surface course obtain, and this kind of multilayer makes the third step of the old surface course tip of cooperation that the structure not only can be better, compares in single-layer structure moreover, and the structure is more stable, makes new surface course not fragile, and life is longer, and firm connection between surface course and the upper surface course can make down in addition on first emulsified asphalt adhesion coating.
The invention is further provided that the thickness of the lower surface layer is between 70 and 90 millimeters, the lower surface layer is formed by laying medium-grain asphalt concrete, the thickness of the upper surface layer is between 30 and 50 millimeters, and the upper surface layer is formed by laying fine-grain asphalt concrete.
By adopting the technical scheme, the cost of the fine grain type asphalt concrete is higher than that of the medium grain type asphalt concrete, so that the upper layer is designed to be thinner than the lower layer, the material cost and the stability of a new pavement layer are considered, and the design of the thickness dimension and the selection of the material are reasonable.
The invention is further provided that a second emulsified asphalt adhesive layer and geotextile are sequentially arranged on the upper surface of the new road supporting layer and the bottom surface of the second step, the second emulsified asphalt adhesive layer is formed by laying emulsified asphalt, and the geotextile is made of polypropylene or polypropylene.
By adopting the technical scheme, the second emulsified asphalt adhesive layer can firmly connect the geotextile and the upper surface of the new road supporting layer, and the second emulsified asphalt adhesive layer can also firmly connect the geotextile and the bottom surface of the second step, so that the geotextile is not easy to loosen and slide; the geotextile has good corrosion resistance, is not easy to damage, and has good seepage-proofing effect, so that rainwater is not easy to permeate into the new road supporting layer.
In conclusion, the beneficial technical effects of the invention are as follows:
firstly, the design of the three-stage steps on the end face of the old pavement main body facilitates the construction of a new pavement main body layer by layer behind the new pavement main body, and in the process of constructing a new pavement supporting layer, expansion joints can be reserved very conveniently, when the concrete expands with heat and contracts with cold in hot days or cold days, the expansion joints can effectively prevent the joints of the new pavement and the old pavement from generating gaps, and the new pavement layer can cover the expansion joints to prevent the expansion joints from directly exposing the pavement;
and secondly, the anchor rod is not easy to slide out when extending into the old road supporting layer, the anchor rod has the anti-pulling effect, and the anchor rod and the steel bar frame cage are connected into a whole by the steel plate, so that the connection between the new road supporting layer and the old road supporting layer is firmer, and the connection firmness of the new road surface and the old road surface at the joint is enhanced.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Reference numerals: 1. a roadbed; 2. an old pavement body; 21. an old road supporting layer; 211. a sawtooth surface; 22. an old pavement layer; 3. a new pavement body; 31. a new roadbed layer; 311. a lower base layer; 312. an upper base layer; 32. a new road supporting layer; 33. a new pavement layer; 331. a lower layer; 332. a first emulsified asphalt binder layer; 333. a top layer; 4. an expansion joint; 5. a steel bar frame cage; 6. a steel plate; 7. an anchor rod; 8. a second emulsified asphalt layer; 9. geotextile; 10. glass fiber cloth.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, the new and old pavement base course overlapping structure disclosed by the invention comprises: a roadbed 1, an old road surface main body 2 and a new road surface main body 3.
The old road surface main body 2 and the new road surface main body 3 are arranged on the roadbed 1, the old road surface main body 2 comprises an old road supporting layer 21 and an old road surface layer 22 which are sequentially laid from bottom to top, a first step is dug on the end surface of the old road supporting layer 21, a second step is formed between the end surface of the old road supporting layer 21 and the end surface of the old road surface layer 22, a third step is dug on the end surface of the old road surface layer 22, and the first step, the second step and the third step are gradually increased; the new road surface main body 3 includes: new road bed 31, new road bed layer 32 and new road bed layer 33, new road bed layer 32 is formed by concrete pavement, the upper surface of new road bed layer 31 flushes with the bottom surface of first step, new road bed layer 32 lays in the upper surface of new road bed layer 31, on the bottom surface of first step, leave expansion joint 4 between the terminal surface of new road bed layer 32 and the side of first step, the upper surface of new road bed layer 32 flushes with the bottom surface of second step, new road bed layer 33 lays in the upper surface of new road bed layer 32, the terminal surface of new road bed layer 33 is laminated with old road bed layer 22's terminal surface mutually, the upper surface of new road bed layer 33 and old road bed layer 22's upper surface flushes.
The width of the expansion joint 4 is 20 mm, and in other embodiments, the width may also be 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 21 mm, 22 mm, 23 mm, 24 mm, or 25 mm. If the expansion joint 4 is less than 15 mm, the expansion joint and the contraction joint of the concrete can not meet the deformation size of the concrete caused by expansion with heat and contraction with cold, so that the joint of the new road surface and the old road surface is still easy to generate gaps, and if the expansion joint 4 is more than 25 mm, the joint of the new road surface and the old road surface is provided with a large cavity inside, when the load-carrying equipment runs on the road surface, the expansion joint 4 is easy to be pressed into a collapse shape, the repair is also troublesome, and the expansion joint 4 with the width size design is more reasonable.
The new roadbed layer 31 includes: the lower base layer 311 and the upper base layer 312 are formed by paving 5% of cement gravel, and the lower base layer 311 and the upper base layer 312 are manufactured by two-time construction. The new roadbed 31 is generally thicker, so that the new roadbed 31 is divided into a lower roadbed 311 and an upper roadbed 312 for two times of construction, and the lower roadbed 311 and the upper roadbed 312 are compacted respectively in the two construction processes, so that the new roadbed 31 with the double-layer structure is firmer, and the construction difficulty is reduced because the thickness is reduced in each time of construction; the 5% cement macadam is prepared by mixing cement and macadam according to a corresponding proportion and stirring, and has the advantages of convenient material taking, convenient preparation and low cost.
The materials of 5 percent of cement broken stone per cubic meter are as follows: 144 kg of water, 120 kg of cement (only common portland cement) and 2218 kg of macadam (the particle size of the macadam is 5-30 mm), and then the water, the cement and the macadam are stirred uniformly by a stirrer.
The terminal surface of old way supporting layer 21 sets up to jagged surface 211, and jagged surface 211 and lower basic unit 311's terminal surface, the terminal surface of last basic unit 312 contact, and jagged surface 211's design can increase the area of contact of old way supporting layer 21's terminal surface to area of contact between new road base layer 31 and the old way supporting layer 21 terminal surface increases by a wide margin, makes the firm in connection between the two higher, has further promoted the stability of new and old road surface seam crossing. In this embodiment, the saw teeth of the saw-toothed surface 211 are arranged horizontally, and in other embodiments, the saw teeth of the saw-toothed surface 211 may also be arranged vertically or obliquely.
The thickness of the lower base layer 311 is 180 mm, and in other embodiments the thickness may be 170 mm, 175 mm, 185 mm, or 190 mm; the thickness of the upper base layer 312 is 180 mm, and in other embodiments the thickness may be 170 mm, 175 mm, 185 mm, or 190 mm. The lower base layer 311 and the upper base layer 312 with the thickness are low in construction cost and raw material cost, and high in structural strength.
The thickness of the new road support layer 32 is 220 mm, and in other embodiments the thickness may be 210 mm, 215 mm, 225 mm, or 230 mm, and the new road support layer 32 has a tensile strength in bending of greater than or equal to 4.5 mpa. The new road supporting layer 32 designed above has high structural strength, is not easy to deform and damage, and has lower construction cost and raw material cost.
The new road supporting layer 32 is pre-buried in the part that is located first step top has steel reinforcement frame cage 5, and new road supporting layer 32 is made by the concrete, and itself has good compressive capacity, and steel reinforcement frame cage 5 can promote the tensile strength that new road supporting layer 32 corresponds the part to can avoid as far as possible by the expend with heat and contract with cold phenomenon that hot day or cold weather arouse, further prevent new and old road surface seam crossing from producing the gap.
Combine fig. 1 and fig. 2 to show, the lower surface welding of reinforcing bar frame cage 5 has steel sheet 6, and the lower surface welding of steel sheet 6 has the stock 7 that inserts in the old road supporting layer 21, and difficult roll-off has the resistance to plucking effect in the stock 7 stretches into old road supporting layer 21, and steel sheet 6 is connected stock 7 and reinforcing bar frame cage 5 as an organic whole again, so connect more firmly between new road supporting layer 32 and the old road supporting layer 21, has strengthened the firm in connection nature of new and old road surface seam crossing. In the construction process, firstly, a hole is drilled in the bottom surface of the first step, then, part of the anchor rod 7 is inserted into the drilled hole, concrete is poured into the hole to fix the anchor rod 7, then, the steel plate 6 is welded to the top of the anchor rod 7, then, the tied steel reinforcement cage 5 is welded to the upper surface of the steel plate 6, then, the concrete is paved to form a new road supporting layer 32, and after the concrete is cured, the steel plate 6 and the steel reinforcement cage 5 are fixed inside the new road supporting layer 32.
The new road surface layer 33 comprises, laid in sequence from bottom to top: the lower layer 331, the first emulsified asphalt adhesive layer 332 and the upper layer 333 are attached, the end face of the lower layer 331 is attached to the side face of the second step, the emulsified asphalt is laid on the upper surface of the lower layer 331 and the bottom face of the third step to form the first emulsified asphalt adhesive layer 332, the upper layer 333 is laid on the first emulsified asphalt adhesive layer 332, and the end face of the upper layer 333 is attached to the side face of the third step. The lower layer 331 and the upper layer 333 of the new pavement layer 33 are constructed in a layered mode, the structure can be matched with the third step at the end of the old pavement layer 22 better due to the multiple layers, compared with a single-layer structure, the structure is more stable, the new pavement layer 33 is not easy to damage, the service life is longer, and the lower layer 331 and the upper layer 333 can be firmly connected through the first emulsified asphalt adhesive layer 332.
The thickness of the lower layer 331 is 80 mm, in other embodiments the thickness may be 70 mm, 72 mm, 74 mm, 76 mm, 78 mm, 82 mm, 84 mm, 86 mm, 88 mm or 90 mm, the thickness of the lower layer 331 is 40 mm, in other embodiments the thickness may be 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 42 mm, 44 mm, 46 mm, 48 mm or 50 mm, and the thickness of the upper layer 333 is 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 42 mm, 44 mm, 48 mm or 50 mm. The cost of fine grain asphalt concrete is higher than that of medium grain asphalt concrete, so the upper layer 333 is designed to be thinner than the lower layer 331, and the design of the thickness dimension and the selection of the material are reasonable in consideration of the material cost and the stability of the new pavement layer 33.
The upper surface of the new road supporting layer 32 and the bottom surface of the second step are sequentially provided with a second emulsified asphalt adhesive layer 8 and geotextile 9, the second emulsified asphalt adhesive layer 8 is formed by laying emulsified asphalt, and the geotextile 9 is made of polypropylene or polypropylene.
The second emulsified asphalt adhesive layer 8 can firmly connect the geotextile 9 with the upper surface of the new road supporting layer 32, and the second emulsified asphalt adhesive layer 8 can also firmly connect the geotextile 9 with the bottom surface of the second step, so that the geotextile 9 is not easy to loosen and slide; the geotextile 9 has good corrosion resistance and is not easy to damage, and has good anti-seepage effect, so that rainwater is not easy to permeate into the new road supporting layer 32, and particularly under the condition that the steel bar frame cage 5, the steel plate 6 and part of the anchor rods 7 are arranged in the new road supporting layer 32, the steel bar frame cage 5, the steel plate 6 and the part of the anchor rods 7 can be prevented from being corroded due to contact with a large amount of permeated rainwater, and the service life of the new road supporting layer 32 is prolonged.
The implementation principle of the embodiment is as follows: the design of tertiary step of 2 terminal surfaces in old road surface main part makes things convenient for new road surface main part 3 of successive layer construction at the back, and at the in-process of constructing new road supporting layer 32, can reserve out expansion joint 4 very conveniently, when the expend with heat and contract with cold takes place for the concrete under hot day or cold weather, expansion joint 4 can prevent effectively that new and old road surface seam crossing from producing the gap, and new road surface layer 33 can cover expansion joint 4 in addition, avoids expansion joint 4 directly to expose the road surface.
Example two:
referring to fig. 3, the new and old pavement base course overlapping structure disclosed by the present invention is different from the first embodiment in that: a layer of glass fiber cloth 10 is laid on the upper surface of the new road base layer 31 and the bottom surface of the first step, and then the new road supporting layer 32 is formed on the glass fiber cloth 10, so that the glass fiber cloth 10 is high in strength, corrosion-resistant and not prone to being torn, the glass fiber cloth 10 further enhances the connecting strength of the joints of the new road and the old road, and the new road and the old road are more durable.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A new and old pavement base course overlap joint structure, its characterized in that includes: the road comprises a roadbed (1), an old road surface main body (2) and a new road surface main body (3);
the old road surface main body (2) and the new road surface main body (3) are arranged on the roadbed (1), the old road surface main body (2) comprises an old road supporting layer (21) and an old road surface layer (22) which are sequentially laid from bottom to top, a first step is excavated on the end surface of the old road supporting layer (21), a second step is formed between the end surface of the old road supporting layer (21) and the end surface of the old road surface layer (22), a third step is excavated on the end surface of the old road surface layer (22), and the first step, the second step and the third step are gradually increased;
the new pavement body (3) comprises: a new road base layer (31), a new road supporting layer (32) and a new road surface layer (33), the new road supporting layer (32) is formed by laying concrete, the upper surface of the new road base layer (31) is flush with the bottom surface of the first step, the new road supporting layer (32) is laid on the upper surface of the new road base layer (31) and the bottom surface of the first step, an expansion joint (4) is reserved between the end surface of the new road supporting layer (32) and the side surface of the first step, the upper surface of the new road supporting layer (32) is flush with the bottom surface of the second step, the new road surface layer (33) is laid on the upper surface of the new road supporting layer (32), the end surface of the new pavement layer (33) is attached to the end surface of the old pavement layer (22), the upper surface of the new pavement layer (33) is flush with the upper surface of the old pavement layer (22).
2. The new and old ground base overlapping structure according to claim 1, characterized in that the width of the expansion joint (4) is 15-25 mm.
3. The new-old base course overlapping structure according to claim 1, wherein the new base course (31) comprises: lower basic unit (311) and upper strata (312), lower basic unit (311) with upper strata (312) are laid by 5% cement rubble and are formed, lower basic unit (311) with upper strata (312) are divided two construction and are made, the terminal surface of old way supporting layer (21) sets up to serrated surface (211), serrated surface (211) with the terminal surface of lower basic unit (311) the terminal surface of upper strata (312) contacts.
4. The new and old pavement base course overlapping structure as claimed in claim 3, characterized in that the thickness of the lower base course (311) is between 170 and 190 mm, and the thickness of the upper base course (312) is between 170 and 190 mm.
5. The new and old pavement base course overlapping structure as recited in claim 1, characterized in that the thickness of the new road supporting layer (32) is between 210 and 230 mm, the new road supporting layer (32) is laid by concrete, and the bending tensile strength of the new road supporting layer (32) is greater than or equal to 4.5 mpa.
6. The new and old pavement base course lap joint structure according to claim 1, characterized in that a reinforcement cage (5) is embedded in a portion of the new pavement supporting layer (32) above the first step.
7. The new and old pavement base course overlapping structure according to claim 6, characterized in that steel plates (6) are welded to the lower surfaces of the reinforcement cage (5), and anchor rods (7) inserted into the old pavement supporting layer (21) are welded to the lower surfaces of the steel plates (6).
8. The new and old road base layer overlapping structure according to claim 1, wherein the new road layer (33) comprises, from bottom to top in sequence: lower surface course (331), first emulsified asphalt adhesion coating (332) and upper surface course (333), the terminal surface of lower surface course (331) with the side of second step is laminated mutually, and emulsified asphalt lays in the upper surface of lower surface course (331) form on the bottom surface of third step first emulsified asphalt adhesion coating (332), upper surface course (333) is laid on first emulsified asphalt adhesion coating (332), the terminal surface of upper surface course (333) with the side of third step is laminated mutually.
9. The new and old road base layer overlapping structure according to claim 8, wherein the thickness of the lower surface layer (331) is between 70 and 90 mm, the lower surface layer (331) is formed by laying medium-grain asphalt concrete, the thickness of the upper surface layer (333) is between 30 and 50 mm, and the upper surface layer (333) is formed by laying fine-grain asphalt concrete.
10. The new and old road base layer overlapping structure according to claim 1, wherein a second emulsified asphalt adhesive layer (8) and a geotextile (9) are sequentially arranged on the upper surface of the new road supporting layer (32) and the bottom surface of the second step, the second emulsified asphalt adhesive layer (8) is formed by laying emulsified asphalt, and the geotextile (9) is made of polypropylene or polypropylene.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111455766A (en) * | 2020-04-14 | 2020-07-28 | 重庆义伦公路建设有限公司 | Regenerated asphalt concrete structure for road and construction process thereof |
| 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 |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3407569A1 (en) * | 1984-03-01 | 1985-09-05 | Joachim 5000 Köln Auerbach | Expansion-joint structure for in-situ concrete floors |
| CN2592702Y (en) * | 2002-12-19 | 2003-12-17 | 薛军伟 | Nonplanar section for traffic road surface |
| CN201351254Y (en) * | 2009-01-09 | 2009-11-25 | 长沙理工大学 | Combined type pavement structure base on breakage cement concrete |
| CN201924254U (en) * | 2010-11-02 | 2011-08-10 | 湖南省交通科学研究院 | Novel expansion joint structure for continuously reinforced concrete composite road surface |
| CN104988827A (en) * | 2015-06-11 | 2015-10-21 | 中冶建工集团有限公司 | Old and new road overlapped connecting method |
| CN205501749U (en) * | 2016-03-28 | 2016-08-24 | 重庆建工市政交通工程有限责任公司 | Structure is widened to highway subgrade |
| CN206070286U (en) * | 2016-09-07 | 2017-04-05 | 北京现代汽车有限公司 | The constructing device and mattess of mattess |
| CN209428869U (en) * | 2019-01-15 | 2019-09-24 | 长安大学 | A kind of new-old concrete bond widens splicing construction |
-
2019
- 2019-12-03 CN CN201911222682.XA patent/CN110924262A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3407569A1 (en) * | 1984-03-01 | 1985-09-05 | Joachim 5000 Köln Auerbach | Expansion-joint structure for in-situ concrete floors |
| CN2592702Y (en) * | 2002-12-19 | 2003-12-17 | 薛军伟 | Nonplanar section for traffic road surface |
| CN201351254Y (en) * | 2009-01-09 | 2009-11-25 | 长沙理工大学 | Combined type pavement structure base on breakage cement concrete |
| CN201924254U (en) * | 2010-11-02 | 2011-08-10 | 湖南省交通科学研究院 | Novel expansion joint structure for continuously reinforced concrete composite road surface |
| CN104988827A (en) * | 2015-06-11 | 2015-10-21 | 中冶建工集团有限公司 | Old and new road overlapped connecting method |
| CN205501749U (en) * | 2016-03-28 | 2016-08-24 | 重庆建工市政交通工程有限责任公司 | Structure is widened to highway subgrade |
| CN206070286U (en) * | 2016-09-07 | 2017-04-05 | 北京现代汽车有限公司 | The constructing device and mattess of mattess |
| CN209428869U (en) * | 2019-01-15 | 2019-09-24 | 长安大学 | A kind of new-old concrete bond widens splicing construction |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111455766A (en) * | 2020-04-14 | 2020-07-28 | 重庆义伦公路建设有限公司 | Regenerated asphalt concrete structure for road and construction process thereof |
| CN111455766B (en) * | 2020-04-14 | 2022-04-12 | 重庆义伦公路建设有限公司 | Regenerated asphalt concrete structure for road and construction process thereof |
| 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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