CN102505602B - Structure and construction method for reinforcing asphalt pavement by drive pins wound with glass fiber yarn - Google Patents

Structure and construction method for reinforcing asphalt pavement by drive pins wound with glass fiber yarn Download PDF

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Publication number
CN102505602B
CN102505602B CN201110329341.XA CN201110329341A CN102505602B CN 102505602 B CN102505602 B CN 102505602B CN 201110329341 A CN201110329341 A CN 201110329341A CN 102505602 B CN102505602 B CN 102505602B
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China
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nailing
glass fiber
fiber yarn
drive pins
structure
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CN201110329341.XA
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Chinese (zh)
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CN102505602A (en
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葛折圣
胡晓倩
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华南理工大学
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Abstract

The invention discloses a structure and a construction method for reinforcing an asphalt pavement by drive pins wound with glass fiber yarn. The structure comprises the drive pins arranged at the joint between an asphalt lower surface layer and a cement stable granular material base layer, as well as the glass fiber yarn wound on the drive pins. By adopting the structure for reinforcing the asphalt pavement, not only can strength of connection between the surface layer and the base layer interface be improved, but also the link among the drive pins is enhanced by using the glass fiber yarn, and the structure of the pavement becomes a whole body and is uniform in stress; and due to the reinforcing effect of the glass fiber yarn wound on the drive pins on the material of the pavement, the shear strength of the pavement is increased and the occurrence of reflection cracks of the pavement is simultaneously reduced.

Description

By structure and the construction method of reinforcing asphalt pavement by drive pins wound with glass fiber yarn

Technical field

The present invention relates to the syndeton between asphalt surface course in highway construction flexible pavement and cement stabilized granular base course.

Background technology

In construction process of asphalt pavement, it is clean that cement stabilized granular base course surface is difficult to cleaning; Priming oil limited penetration depth.Interlayer connection is in semicontinuous state, causes occurring in cutting optimal work progress that compound is passed, ftractureing and loose phenomenon; After being open to traffic, under action of traffic loading, produce larger tensile stress bottom bitumen layer, thus fatigue failure occurs.

The patent announced " improves structure and the method for asphalt surface course and cement stabilized base course interface bonding strength ", and the weak point of (patent No.: ZL200910104999.3) is: it is isolated for being connected between asphalt surface course and cement stabilized base course nailing used, do not form " network ", the stressed of each nailing is uneven.Can not ensure that each nailing can play its effect.

The present invention, on the basis of existing patent ZL200910104999.3, carries out well-regulated winding with glass fiber yarn to nailing, not only strengthens the contact between nailing, makes its uniform force; And, serve the effect of road pavement reinforcement, add the shear strength on road surface.

Summary of the invention

The object of this invention is to provide the method for attachment between a kind of asphalt surface course and cement stabilized granular base course.The problem solved is the contact strengthened between nailing, enhances the continuity on road surface, improves inter-layer shearing strength.

The test method of the type of nailing of the present invention, the erection equipment of nailing, evaluation interface switching performance is identical with existing patent ZL200910104999.3.

The object of the invention is achieved through the following technical solutions.

A structure for reinforcing asphalt pavement by drive pins wound with glass fiber yarn, comprises the nailing that pitch cutting optimal and cement stabilized granular base course junction are provided with, also comprises the glass fiber yarn be wrapped on nailing.

The arrangement mode of preferred nailing is square or triangle.

All nailings connect by the described glass fiber yarn be wrapped on nailing.

Described nailing is long 40mm ~ 80mm, and nail shank diameter is 3mm ~ 5mm.

Described nailing inject the cement stabilized granular base course degree of depth be nailing long 1/10 ~ 9/10.

The construction method of the structure of described a kind of reinforcing asphalt pavement by drive pins wound with glass fiber yarn, comprises the following steps:

(1) cement stabilized granular base course is made on road surface; Nailing is injected on cement stabilized granular base course surface;

(2) by being wound around glass fiber yarn on each nailing, all nailings are coupled together;

(3) pave and rolled asphalt surface layer.

The arrangement mode of described nailing is square or triangle.

The method of described winding glass fiber yarn is preferred: carry out horizontal and vertical winding, laterally: level starts to carry out serpentine winding; Longitudinal: vertically to start the winding carrying out down serpentine, and glass fiber yarn is wound around a circle on each nailing; .

Described nailing is long is 40mm ~ 80mm, inject the cement stabilized granular base course degree of depth be nailing long 1/10 ~ 9/10.

The glass fiber yarn that winding nailing adopts can adopt e-glass fiber roving.

Glass fiber yarn diameter is 0.2 ~ 3mm, 1.5mm, and breaking strength is 5kN/m ~ 100kN/m, longitudinal fracture elongation rate 0 ~ 4%.

The winding method of glass fiber yarn adopts the Wiring apparatus be arranged between paver paving box and running gear (crawler belt or wheel), the technical data such as coiling length, canoe of glass fiber yarn can be regulated according to the spacing of nailing, arrangement mode, or adopt false twist's glass fiber yarn.

The advantage that the present invention has relative to prior art and beneficial effect:

The present invention adopts the nailing being wound around glass fiber yarn to connect asphalt surface course and cement stabilized granular base course, compare issued patents ZL200910104999.3, due to the use of glass fiber yarn, not only increase the bonding strength at surface layer and basic unit interface, and the use of glass fiber yarn strengthens the contact between nailing, make road structure become as a whole, make its uniform force; Owing to being wound around the reinforced action of the glass fiber yarn road pavement material of nailing, adding the shear strength on road surface, meanwhile, decrease the generation of reflection cracking in a pavement.

Accompanying drawing explanation

Fig. 1 is the road structure schematic diagram that nailing connects cutting optimal and basic unit;

Fig. 2 is the schematic diagram laterally carrying out serpentine winding to the right;

Fig. 3 is the schematic diagram longitudinally carrying out the winding of falling serpentine;

The figure terminating rear formation is wound around when Fig. 4 is nailing square arrangement;

Fig. 5 is test specimen and the loading mode of shear test;

Fig. 6 is nailing arrangement mode and the pattern around yarn in shear test block;

Fig. 7 is test specimen and the loading mode of fatigue test;

Fig. 8 is nailing arrangement position and the pattern around yarn in fatigue sample.

Detailed description of the invention

Be described in further detail below in conjunction with the evaluation test process of example to interface of the present invention switching performance.

Embodiment 1

Present invention employs Portland cement, SBS (I-D) modified bitumen, limestone aggregates and breeze that strength grade is P.C32.5, all technical all meets the requirement of " highway road surface construction technique normalizing " (JTJ034-2000), " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004).Cement stabilized granular grating is the intermediate value of the cement stabilized macadam grading limit that " highway road surface construction technique normalizing " (JTJ 034-2000) provides, and cement consumption is 4.5%.Asphalt mixture gradation is the AC-20C mixture gradation scope intermediate value that " standard specification for construction and acceptance of highway asphalt pavement " (JTG F40-2004) provides, and asphalt content is 4.3%.

A structure for reinforcing asphalt pavement by drive pins wound with glass fiber yarn, comprises the nailing that pitch cutting optimal and cement stabilized granular base course junction are provided with, also comprises the glass fiber yarn be wrapped on nailing.

The arrangement mode of nailing is square, described in the glass fiber yarn be wrapped on nailing all nailings are connected.Have employed the PS52 type butch haircut nailing that Sichuan Nanshan Shooting Nail Fastening Device Co., Ltd produces, long 52mm, nail shank diameter 3.5mm, head of a nail diameter 7.6mm; Described nailing inject the cement stabilized granular base course degree of depth be nailing long 1/10 ~ 9/10.

The e-glass fiber roving that glass fiber yarn adopts tai shan glass fiber Co., Ltd to produce, diameter is 1.5mm, and breaking strength is 30kN/m, longitudinal fracture elongation rate 4%.

The construction method of the structure of described a kind of reinforcing asphalt pavement by drive pins wound with glass fiber yarn, comprises the following steps:

(1) cement stabilized granular base course is made on road surface; Nailing is injected on cement stabilized granular base course surface;

(2) by being wound around glass fiber yarn on each nailing, all nailings are coupled together;

(3) pave and rolled asphalt surface layer.The technique specified by existing " standard specification for construction and acceptance of highway asphalt pavement " (JTGF40-2004) paves and rolled asphalt cutting optimal, middle surface layer and upper layer.

The arrangement mode of described nailing is square.

A kind of method of described winding glass fiber yarn: carry out horizontal and vertical winding, laterally: level starts to carry out serpentine winding; Longitudinal: vertically to start the winding carrying out down serpentine, and glass fiber yarn is wound around a circle on each nailing.

Embodiment 2

By test evaluation interface switching performance

1. shear test

By shear test, evaluate the cement stabilized granular of nailing connection and the interface shearing performance of bituminous mixture superposed beam test specimen that are tied with glass fiber yarn, test model as shown in Figure 5.

Test material preparation method is: the size of test specimen, preparation method, health-preserving condition and the installation of time, nailing, the cutting of test specimen etc. are all with issued patents ZL200910104999.3 is identical, just after nailing installation terminates, be wound around nailing with glass fiber yarn, canoe is according to shown in Fig. 2 and 3.The arrangement mode of nailing and around yarn effect as shown in Figure 4.

At nailing and the cement stabilized granular after yarn completes on the surface, according to T 0703-1993 test method in " highway engineering pitch and Asphalt Mixture Experiment code " (JTJ 052-2000), the bituminous mixture of the shaping thick 6cm of rolling; After ambient temperatare puts 24h, cut growth 20cm, wide 15cm, high 15cm superposed beam test specimen.

The test material preparation method without the connection of winding nailing as contrast test is identical with the method for test material preparation in the patent ZL200910104999.3 announced.

Shearing test method is: first, and test specimen is incubated 6h in the environmental cabinet of 20 DEG C.Then, cement stabilized granular test specimen is fixed with reaction frame, as shown in Figure 5.Bottom bitumen mixture specimen, install jack, load with jack, loading speed is 50mm/min.Need test in the air-conditioned room of 20 DEG C.

When the maximum load applied is P (N), interface shear strength τ = P 30 kPa .

The shear test result that table 1 gives, be wound around without glass fiber yarn.From table 1, have around yarn, have nailing to connect the shear strength at bituminous mixture and cement stabilized macadam interface than there being nailing, without improve 1 times nearly around the interface that yarn is connected.

Table 1 interface shearing result of the test

2. repeated bend test

The interface fatigue performance of the cement stabilized granular that the nailing being tied with glass fiber yarn by fatigue test evaluation connects and bituminous mixture superposed beam test specimen, test model as shown in Figure 7.

Test material preparation method is: first, is wound around according to shear test identical method making glass fiber yarn the doubling plate that nailing connects the long 300mm made, wide 300mm, high 260mm.And then cut into the superposed beam test specimen of long 250mm as shown in Figure 7, Figure 8, wide 30mm, high 70mm.

The test material preparation method without the nailing connection be wound around as contrast test is identical with the method that test specimen in the patent ZL200910104999.3 announced makes.

Fatigue test method is: the bending fatigue testing method adopting strain controlling pattern, throws off for interfacial fatigue criterion of failure with bituminous mixture and cement stabilized granular.Testing equipment is MTS 810 Material Testing Machine produced in USA.In process of the test, control the flexural-tensile strain bottom test specimen by control girder test specimen mid-span deflection value.As shown in Figure 7, mid point loads loading method, and standoff distance is 200mm.Loaded contact analysis and frequency are 10Hz continous way haversine ripple load.Strain level is 400 microstrains.Test temperature is 15 DEG C.

The fatigue test results that table 2 gives, be wound around without glass fiber yarn.From table 2, have around yarn, have nailing to connect the shear strength at bituminous mixture and cement stabilized macadam interface than there being nailing, without improve more than 1100 time around the interface that yarn is connected.

Process characteristic of the present invention is: in bituminous mixture cutting optimal paving process, adopts glass fiber yarn to be wound around nailing and connects cement stabilized granular base course and asphalt surface course.Rising compared with connection function with only having nailing in patent of invention ZL200910104999.3, strengthening the contact between single nailing, enhancing the bonding strength at surface layer and basic unit interface, can significantly reduce tensile stress bottom asphalt surface course; Produce preventing cutting optimal pass, cracking and the phenomenon such as loose have obviously effect; And after glass fiber yarn is wound around nailing, serves the effect of road pavement reinforcement and reinforcement, improve rigidity and the shear strength of cutting optimal, can thinning thickness of bituminous surface and decrease the generation of reflection cracking in a pavement.

Table 2 interfacial fatigue result of the test

Claims (7)

1., by a structure for reinforcing asphalt pavement by drive pins wound with glass fiber yarn, comprise the nailing that pitch cutting optimal and cement stabilized granular base course junction are provided with, it is characterized in that: also comprise the glass fiber yarn be wrapped on nailing; Described nailing is long 40mm ~ 80mm, and nail shank diameter is 3mm ~ 5mm; Described nailing inject the cement stabilized granular base course degree of depth be nailing long 1/10 ~ 9/10.
2. the structure of a kind of reinforcing asphalt pavement by drive pins wound with glass fiber yarn according to claim 1, is characterized in that: the arrangement mode of described nailing is square or triangle.
3. the structure of a kind of reinforcing asphalt pavement by drive pins wound with glass fiber yarn according to claim 1, is characterized in that: described in the glass fiber yarn be wrapped on nailing all nailings are connected.
4. the construction method of the structure of a kind of reinforcing asphalt pavement by drive pins wound with glass fiber yarn according to claim 1, is characterized in that: comprise the following steps:
(1) cement stabilized granular base course is made on road surface; Nailing is injected on cement stabilized granular base course surface;
(2) by being wound around glass fiber yarn on each nailing, all nailings are coupled together;
(3) pave and rolled asphalt surface layer.
5. construction method according to claim 4, is characterized in that: the arrangement mode of described nailing is square or triangle.
6. construction method according to claim 4, is characterized in that: the method for described winding glass fiber yarn is: carry out horizontal and vertical winding, laterally: level starts to carry out serpentine winding; Longitudinal: vertically to start the winding carrying out down serpentine, and glass fiber yarn is wound around a circle on each nailing.
7. according to the construction method one of claim 4 ~ 6 Suo Shu, it is characterized in that: described nailing is long is 40mm ~ 80mm, inject the cement stabilized granular base course degree of depth be nailing long 1/10 ~ 9/10.
CN201110329341.XA 2011-10-26 2011-10-26 Structure and construction method for reinforcing asphalt pavement by drive pins wound with glass fiber yarn CN102505602B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107841915A (en) * 2017-11-27 2018-03-27 佛山科学技术学院 A kind of municipal works road pavement structure

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103015303B (en) * 2012-12-13 2015-06-03 华南理工大学 Construction method for restoring surface structure and cracks on asphalt pavement
CN104141270B (en) * 2014-07-22 2016-04-13 东北大学 Administer strengthening structure part and the construction Craft of asphalt pavement rut disease
CN108179673A (en) * 2017-12-20 2018-06-19 张昆 The asphalt pavement structure body and its paving method of additional insulation cooling layer
CN108374301A (en) * 2018-02-02 2018-08-07 南通城欣市政工程有限公司 Road surface structure and its construction method

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EP0919667A1 (en) * 1996-08-16 1999-06-02 Mitsubishi Materials Corporation NOx REMOVING PAVEMENT STRUCTURE
JP2003336208A (en) * 2002-05-17 2003-11-28 Kanebo Ltd Sheet for reinforcing pavement
CN101597878A (en) * 2009-06-26 2009-12-09 华南理工大学 A kind of combined type paving structure and paving method thereof
JP2010007353A (en) * 2008-06-26 2010-01-14 Himeji Ichi Asphalt pavement repairing method
CN202280007U (en) * 2011-10-26 2012-06-20 华南理工大学 Structure for reinforcing asphalt road surface by winding glass fiber yarns on shoot nails

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CN1986968A (en) * 2005-12-22 2007-06-27 深圳市海川实业股份有限公司 Composite earthwork cloth for road
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EP0919667A1 (en) * 1996-08-16 1999-06-02 Mitsubishi Materials Corporation NOx REMOVING PAVEMENT STRUCTURE
JP2003336208A (en) * 2002-05-17 2003-11-28 Kanebo Ltd Sheet for reinforcing pavement
JP2010007353A (en) * 2008-06-26 2010-01-14 Himeji Ichi Asphalt pavement repairing method
CN101597878A (en) * 2009-06-26 2009-12-09 华南理工大学 A kind of combined type paving structure and paving method thereof
CN202280007U (en) * 2011-10-26 2012-06-20 华南理工大学 Structure for reinforcing asphalt road surface by winding glass fiber yarns on shoot nails

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107841915A (en) * 2017-11-27 2018-03-27 佛山科学技术学院 A kind of municipal works road pavement structure

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