CN113026469A

CN113026469A - Stress relieving pavement

Info

Publication number: CN113026469A
Application number: CN202110318269.4A
Authority: CN
Inventors: 施德飞
Original assignee: Yiwu Haosheng New Material Co ltd
Current assignee: Yiwu Haosheng New Material Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-06-25

Abstract

The invention discloses a stress relief pavement, which relates to the municipal engineering technology and aims to solve the problem that the service life of the pavement is greatly shortened and the pavement is very easily influenced in the driving or walking process of people due to the fact that the pavement is very easy to crack because of self stress of a concrete pavement, and the technical scheme is as follows: the concrete surface includes concrete layer and fills the steel framework in concrete layer, and waterproof adhesive linkage includes a plurality of wide crack control subsides that bond at the concrete layer top surface, lays at the glass fiber grid of wide crack control subsides top surface and covers at the wide crack control subsides and be located the pitch waterproof layer in the glass fiber grid outside, and the drainage stress absorbing layer is mixture coarse grain skeleton texture, and mixture coarse grain skeleton texture forms the clearance between its coarse grain. The invention can absorb the stress in the road surface and avoid the cracking of the road surface caused by the stress release.

Description

Stress relieving pavement

Technical Field

The invention relates to municipal engineering technology, in particular to a stress relief pavement.

Background

Cement concrete pavements can be damaged to varying degrees over time. The asphalt concrete surface layer (commonly called 'white plus black') is additionally paved on the cement concrete pavement, so that the service function of the cement pavement can be improved, the flatness of the pavement can be improved, and the service life of the cement pavement can be prolonged. However, the tensile effect caused by the shrinkage or displacement of the cement concrete plate in the horizontal direction, the bending tensile stress at the bottom of the surface layer, or the vertical shear stress at the joint or crack under the heavy traffic load effect can generate a reflection crack on the asphalt concrete surface layer, which affects the service life of the asphalt concrete surface layer, and the damage is particularly obvious under the low temperature condition.

In order to effectively prevent, delay and reduce the occurrence of reflection cracks, a thicker (such as 10-15 cm) overlay is often adopted for repairing, and the thicker the pavement thickness is, the higher the cost is, and the larger the resource waste is. In recent years, a treatment method has been proposed in which a reflective crack stress absorbing layer is provided between a cement concrete slab and an asphalt mixture surface layer. Such as reflective crack stress absorbing layer "Strata" manufactured by certain company in the united states. However, the product only has an absorption function and has no structural function, and after the product is used in white and black projects in cities such as Beijing, Shanghai and the like, the stress absorption effect is limited, and a structural layer needs to be additionally paved, so that the thickness and the cost of the whole structure are increased undoubtedly. In addition, the "Strata" stress absorbing layer is subject to structural failure, such as in use, which can essentially lose the stress absorbing function.

Therefore, at present, the concrete pavement is very easy to crack due to self stress, so that the service life of the pavement is greatly shortened, and the pavement is very easy to be influenced in the process of driving or walking.

Therefore, a new solution is needed to solve this problem.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a stress relief road surface, which can absorb the stress in the road surface and avoid the cracking of the road surface caused by the stress release problem.

The technical purpose of the invention is realized by the following technical scheme: the utility model provides a stress relief road surface, includes the road surface body, concrete surface course, waterproof adhesive linkage, drainage stress absorbed layer, well surface course, adhesive linkage and the upper surface course that the road surface body set gradually from bottom to top, concrete surface course includes concrete layer and fills the steel framework in concrete layer, waterproof adhesive linkage includes a plurality of wide crack control subsides that bond the concrete layer top surface, lays at the fine grid of glass of wide crack control subsides top surface and covers the pitch waterproof layer that pastes and be located the fine grid outside at wide crack control, drainage stress absorbed layer is mixture coarse grain skeleton texture, mixture coarse grain skeleton texture forms the clearance between its coarse grain.

Through adopting above-mentioned technical scheme, through setting up drainage stress absorbed layer, thereby make the road surface body not only can discharge the rainwater on the waterproof adhesive linkage, through the excellent water proof effect that the waterproof adhesive linkage possesses and the slope on road surface, discharge the rainwater, avoid the rainwater to fall on the concrete surface course, avoid the concrete surface course to receive the problem that the influence of soaking and the temperature of rainwater takes place the fracture for a long time, steel framework in the concrete layer can resist the stress of concrete layer simultaneously, avoid the concrete layer to take place the crooked condition comparatively easily and the fracture.

The invention is further configured to: the middle surface layer and the upper surface layer are both SBS modified asphalt layers.

The invention is further configured to: the bonding layer is an emulsified asphalt layer.

The invention is further configured to: the mixture coarse particle framework structure is formed by a plurality of high-performance asphalt mastic coated framework particles filled between the middle surface layer and the waterproof bonding layer.

The invention is further configured to: the road surface body both sides all are provided with the cable tower, the equal fixedly connected with cable in both sides that the cable tower is adjacent to the road surface body, the one end and the steel framework fixed connection that the cable tower was kept away from to the cable just pass the road surface body, the both ends tie point distance more than or equal to length of cable.

Through adopting above-mentioned technical scheme, through setting up tower cable and cable to make the tower cable can bear great effort, and the cable then can provide ascending effort to steel framework's in the concrete surface course stress concentration department, thereby avoid steel framework and concrete layer because warpage stress and internal stress take place the condition that both ends upwards buckled, thereby avoid concrete surface course to take place the problem of fracture.

The invention is further configured to: and one end of the stay cable, which is far away from the cable tower, is uniformly arranged at intervals along the length direction of the pavement body.

Through adopting above-mentioned technical scheme, because the cable evenly sets up to make the pulling force of the anti-resistance stress that the road surface body received can evenly distributed, make the road surface body be difficult to take place the problem of local fracture.

The invention is further configured to: the cable tower is in an inverted V shape.

Through adopting above-mentioned technical scheme, because the cable tower is the font of falling V to make cable tower can form stable triangle-shaped structure subaerial, make cable tower can bear great effort and can not take place damaged problem.

The invention is further configured to: two support legs at the bottom of the cable tower are fixedly connected with a tower footing pre-buried underground, and the cross-sectional area of the tower footing is larger than that of the support legs of the cable tower.

Through adopting above-mentioned technical scheme, through setting up the column foot to make cable tower comparatively stable and firmly set up subaerial, be difficult to take place to be pulled out or the problem of empting.

The invention is further configured to: the high-performance asphalt mastic coated skeleton particles comprise 60-90 parts of 3-5mm aggregates, 5-20 parts of 0-3mm aggregates, 0-10 parts of mineral powder and 5-15 parts of high-viscosity asphalt.

In conclusion, the invention has the following beneficial effects:

through setting up drainage stress absorbed layer, thereby make the road surface body not only can discharge the rainwater on the waterproof adhesive layer, through the slope on excellent water proof effect and road surface that the waterproof adhesive layer possessed, discharge the rainwater, avoid the rainwater to fall on the concrete surface course, avoid the concrete surface course to receive the problem that the influence of soaking and the temperature of rainwater takes place the fracture for a long time, steel framework in the concrete layer can resist concrete layer's stress simultaneously, avoid concrete layer to take place warping condition and fracture comparatively easily.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an exploded view of the present invention with the pylon and guy cable removed;

fig. 4 is an enlarged view at B in fig. 3.

In the figure: 1. a concrete facing; 2. a fiberglass grille; 21. an asphalt waterproof layer; 3. a drainage stress absorbing layer; 4. a middle layer; 5. an adhesive layer; 6. a top layer; 7. a cable tower; 8. a tower footing; 9. a pull rope.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

The first embodiment is as follows:

a stress relieving pavement comprises a pavement body, and a concrete surface layer 1, a waterproof adhesive layer, a drainage stress absorbing layer 3, a middle surface layer 4, an adhesive layer 5 and an upper surface layer 6 which are sequentially arranged on the pavement body from bottom to top as shown in figures 3 and 4.

Concrete surface course 1 includes concrete layer and fills the steel framework in concrete layer, through setting up steel framework to make concrete layer can depend on steel framework, make concrete surface course 1's structural strength effectively strengthened, make steel framework can resist concrete layer's stress, avoid concrete layer to take place the problem of fracture comparatively easily.

The waterproof bonding layer comprises a plurality of wide anti-cracking pastes adhered to the top surface of the concrete layer, a glass fiber grating 2 laid on the top surface of the wide anti-cracking pastes and an asphalt waterproof layer 21 covered on the wide anti-cracking pastes and positioned outside the glass fiber grating 2, the wide anti-cracking pastes are arranged, so that the top surface of the concrete layer can be reinforced, a horizontal folding acting force can be provided before the concrete layer cracks, the condition that the concrete layer cracks is avoided, the top surface of the concrete layer can be shielded when the top surface of the concrete layer cracks, meanwhile, the asphalt waterproof layer 21 can play an effective water-proof effect, when water permeates from top to bottom, the water can be prevented from being isolated through the asphalt waterproof layer 21, the problem that the concrete layer cracks when being soaked in water for a long time is avoided, the glass fiber grating 2 can reinforce the structure of the asphalt waterproof layer 21, and when the acting force is applied, can resist through the glass fiber grating 2 to strengthen the asphalt waterproof layer 21, avoid its fracture.

The drainage stress absorbing layer 3 is a mixture coarse particle framework structure, the mixture coarse particle framework structure forms gaps among coarse particles, the mixture coarse particle framework structure is a plurality of high-performance asphalt mastic coated framework particles filled between the middle surface layer 4 and the waterproof bonding layer, the high-performance asphalt mastic coated framework particles comprise 70 parts of aggregates with the thickness of 3-5mm, 10 parts of aggregates with the thickness of 0-3mm, 1 part of mineral powder and 7 parts of high-viscosity asphalt, the gaps can dissipate shearing force generated by dislocation of concrete plates to form stress absorbing capacity, so that the shearing resistance and fatigue resistance of the structural layer are greatly improved compared with those of the common lower surface layer material, and meanwhile, important pavement performance indexes such as high-temperature stability, low-temperature shrinkage crack resistance, water stability and the like of the structural layer exceed those of the common absorbing layer material, and the waterproof bonding layer is manufactured, can prevent water from gathering in the layer, can discharge water along the cross slope direction or the longitudinal gradient direction through drainage blanket.

The middle surface layer 4 and the upper surface layer 6 are both SBS modified asphalt layers, and the bonding layer 5 is an emulsified asphalt layer.

As shown in fig. 1 and 2, road surface body both sides all are provided with the cable tower 7 that is the font of falling V, the equal fixedly connected with cable 9 in both sides that cable tower 7 is adjacent to the road surface body, cable 9 keeps away from cable tower 7's one end and steel framework fixed connection and passes the road surface body, and cable 9 keeps away from cable tower 7's one end along the even interval setting of road surface body length direction, cable 9's both ends tie point distance more than or equal to cable 9's length, in the daily use of road surface body in-process, cable 9 can stimulate steel framework in the concrete surface course 1, thereby make concrete surface course 1 obtain ascending effort, make this effort can resist the warping stress and the internal stress of concrete surface course 1, thereby make concrete surface course 1 can have better structural strength, make it be difficult to take place cracked condition.

Two stabilizer blades in bottom of cable tower 7 are all fixedly connected with and are pre-buried in the footing 8 in the ground, and the cross-sectional area of footing 8 is greater than the stabilizer blade cross-sectional area of cable tower 7, through setting up footing 8 to it is comparatively stable when making it to make cable tower 7 set up on the ground, is difficult to take place the condition of empting, makes cable tower 7 set up very stably.

When people need to lay the road surface, people can firstly measure the width of the road surface, and begin to excavate on the earth through an excavator, so that grooves with the depth of about 40cm and the width and the length the same as the preset specifications of the road surface are excavated on the earth, pits are excavated every 60 meters apart from the length of the road surface, the pits are positioned on two sides of the length direction of the grooves, and the depth of the pits is larger than the depth of the grooves.

Then people hang through the loop-type to steel framework through the loop wheel machine and get, steel framework is the cyclic annular of mouth font, steel framework inlays in the recess, and people lay tower footing 8 in the pit, simultaneously cable 9 is fixed in the steel framework of the both sides of road surface body through fixed modes such as welding, then people descend through the unset concrete of mode pouring, lay the laser level appearance in the both sides of recess and make level, and carry out the work of making level of concrete layer through artificial mode, and static certain time.

After concrete in the groove and the pit is solidified, the concrete surface layer 1 is molded, the tower foundation 8 is molded, a template is paved on the tower foundation 8 by people, the pit and the groove are separated, people continue to build a steel bar structure in the template, the concrete is poured, the template is detached after the concrete is solidified, the cable tower 7 integrally molded with the tower foundation 8 is obtained, and the other end of the stay cable 9 is connected with the tower foundation 8 by people.

70 parts of aggregate with the thickness of 3-5mm, 10 parts of aggregate with the thickness of 0-3mm, 1 part of mineral powder and 7 parts of high-viscosity asphalt are stirred by a stirrer, in the stirring process, people manually bond a wide anti-cracking paste on the top surface of the concrete surface layer 1, then lay a glass fiber grating 2 on the top surface of the wide anti-cracking paste, further pour an asphalt waterproof layer 21, and flatten the asphalt by a road roller.

After the asphalt waterproof layer 21 is cooled and solidified, high-performance asphalt mastic coated skeleton particles in the stirrer are poured on the asphalt waterproof layer 21 to form a mixture coarse particle skeleton structure and a drainage stress absorption layer 3, gaps among coarse particles of the mixture coarse particle skeleton structure are formed, and the drainage stress absorption layer 3 is swept by a manual way.

Then people irrigate the SBS modified asphalt layer on the drainage stress absorption layer 3 to serve as the middle surface layer 4, irrigate the emulsified asphalt layer to serve as the bonding layer 5, and irrigate the SBS modified asphalt layer on the bonding layer 5 to flatten the layer to serve as the upper surface layer 6, so that the pavement body is completed.

Example two:

the difference from the embodiment is that:

the high-performance asphalt mastic coated skeleton particles comprise 84 parts of 3-5mm aggregates, 16 parts of 0-3mm aggregates, 4 parts of mineral powder and 6 parts of high-viscosity asphalt.

Detecting items	Unit of	The result of the detection	Technical requirements	Singleton decision
					Asphalt content	％		7	——	——
Oil-stone ratio	％	6.54	——	——
					Relative density of martensite	/	2.3522	Measured value	——
Degree of stability	KN	4.86	≥5.0	Qualified
					Flow value	0.1mm	30	20～40	Qualified
Void fraction	％	16.7	15～23	Qualified
					Void fraction of mineral aggregate	％	32.4	——	——
Degree of saturation of asphalt	％	43	——	——
					Kentabao fly apart	％	16.6	≤20	Qualified
Sheerburg asphalt leakage	％	0.21	≤0.3	Qualified
					Rut test	Sub/mm	4016	≥4000	Qualified

Table 1 shows the results of the index test of the asphalt mixture according to example I

Detecting items	Unit of	The result of the detection	Technical requirements	Singleton decision
					Asphalt content	％	5.75	——	——
Oil-stone ratio	％	6.10	——	——
					Relative density of martensite	/	2.089	Measured value	——
Degree of stability	KN	6.15	≥5.0	Qualified
					Flow value	0.1mm	27	20～40	Qualified
Void fraction	％	18.1	15～23	Qualified
					Void fraction of mineral aggregate	％	29.7	——	——
Degree of saturation of asphalt	％	40.0	——	——
					Kentabao fly apart	％	12.6	≤20	Qualified
Sheerburg asphalt leakage	％	0.16	≤0.3	Qualified
					Rut test	Sub/mm	4219	≥4000	Qualified

Table 2 shows the results of the asphalt mixture index tests of example two

According to the asphalt mixture index detection results of the first embodiment and the second embodiment, the optimal ratio of the asphalt mixture index detection results is the second embodiment.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A stress relieving pavement, comprising: including the road surface body, concrete surface course (1), waterproof adhesive linkage, drainage stress absorbed layer (3), well surface course (4), adhesive linkage (5) and higher authority layer (6) that the road surface body set gradually from bottom to top, concrete surface course (1) includes concrete layer and fills steel framework in concrete layer, waterproof adhesive linkage includes a plurality of wide crack control subsides that bond at the concrete layer top surface, lays glass fiber grating (2) at wide crack control subsides top surface and covers asphalt waterproof layer (21) in wide crack control subsides and be located the glass fiber grating (2) outside, drainage stress absorbed layer (3) are mixture coarse grain skeleton texture, mixture coarse grain skeleton texture forms the clearance between its coarse grain.

2. A stress relieving pavement according to claim 1, further comprising: the middle surface layer (4) and the upper surface layer (6) are both SBS modified asphalt layers.

3. A stress relieving pavement according to claim 1, further comprising: the bonding layer (5) is an emulsified asphalt layer.

4. A stress relieving pavement according to claim 1, further comprising: the mixture coarse particle framework structure is formed by a plurality of high-performance asphalt mastic coating framework particles filled between the middle surface layer (4) and the waterproof bonding layer.

5. A stress relieving pavement according to claim 1, further comprising: the road surface body both sides all are provided with cable tower (7), cable tower (7) are adjacent to the equal fixedly connected with cable (9) in both sides of road surface body, the one end and the steel framework fixed connection of cable tower (7) are kept away from in cable (9) and pass the road surface body, the both ends tie point distance length more than or equal to cable (9) of cable (9).

6. A stress relieving pavement according to claim 5, further comprising: and one end of the stay cable (9) far away from the cable tower (7) is uniformly arranged at intervals along the length direction of the pavement body.

7. A stress relieving pavement according to claim 5, further comprising: the cable tower (7) is in an inverted V shape.

8. A stress relieving pavement according to claim 5, further comprising: two support legs at the bottom of the cable tower (7) are fixedly connected with a tower foundation (8) which is pre-buried underground, and the cross sectional area of the tower foundation (8) is larger than that of the support legs of the cable tower (7).

9. A stress relieving pavement according to claim 4, further comprising: the high-performance asphalt mastic coated skeleton particles comprise 60-90 parts of 3-5mm aggregates, 5-20 parts of 0-3mm aggregates, 0-10 parts of mineral powder and 5-15 parts of high-viscosity asphalt.