CN102635046B - Method for controlling paving and segregation of asphalt macadam - Google Patents

Abstract

The invention relates to a method for controlling paving and segregation of asphalt macadam, and the method is applied in highway construction. The method comprises the following steps of: for mixture loading and transporting on site, jacking a vehicle sideboard at a position approaching to 45 degrees at a time when a vehicle pours the mixture into a receiving hopper of a paver, blanking the mixture evenly and intensively, fully filling a rear packing auger in time and ensuring that the mixture is 5-10cm higher than the auger when the mixture achieves at the two thirds position of the receiving hopper of the paver, starting the paver at a speed of 1-3m/min and maintaining the position of the auger to a mixture level position, maintaining the mixture in the receiving hopper not to be lower than one fourth when the vehicle completely discharges the mixture and drives away, strictly forbidding the hopper close, immediately performing the material receiving of a next vehicle, and performing hopper collection after the everyday construction is completed. Under the condition of not changing the paving equipment, the segregation phenomenon of the asphalt macadam in the paving process can be solved through scientific and reasonable flow arrangement and control so as to improve the integrity, slab entirety and load-carrying capability.

Description

A kind of method controlling asphalt macadam Segregation

Technical field

The present invention relates to highway engineering field, be specifically related to a kind of being applied in highway construction construction and control the method for asphalt macadam Segregation.

Technical background

Asphalt macadam is the bituminous mixture being widely used in speedway cutting optimal in recent years, play the stressed effect of transition surface layer and basic unit, but because its particle diameter is larger, compound is thicker, asphalt content is few, cause the uniformity of compound itself, workability poor, in construction and easily, cause segregation, permeable, roll result inequality, even vehicle travel time cause loose phenomenon.

Summary of the invention

Of the present invention objectjust be to provide a kind of method controlling asphalt macadam Segregation, it can when not changing laying equipment, the segregation phenomenon of asphalt macadam in paving process is solved, to improve globality, plate body and supporting capacity by scientific and reasonable flow arrangement and control.

The present invention realizes that foregoing invention object adopts technical schemefor:

A kind of method controlling the on-the-spot Segregation of asphalt macadam of the present invention, its method step realized is:

One, asphalt remixer is in place, require that lower position adjusted to by paver screw distributing device; Screed horizontal wall inscription has adjusted, and the faulting of slab ends of two pieces of screeds is within 1mm, and heating-up temperature has arrived 100 degree;

Two, according to before, during and after vehicle three sections, upper and lower two-layer requirement is by the compound entrucking of segmentation, layering, be transported to job site, vehicle is in asphalt paver travel direction, and at the position temporary shut down of distance 100-200 rice, then reversing is stopped to during distance paver 20-30cm, waits for that paver promotes transport vehicle tire running, and when paver contact transport vehicle, vehicle opens top; Side board is once raised to the positions of 40 to 50 degree, make compound evenly, concentrate and drop in the hopper of paver;

Three, when compound is discharged to 2/3 position of paver hopper, start spiral distributor and stock guide, compound is longitudinally transported to the position of paver screw distributing device, batch turning speed and the distributing device speed of batch turning plate match, and do not occur the situation of windrow, fracture; Spiral distributor is utilized compound to be laterally transported to uniformly the whole face that paves of paver, compound to be covered with on the whole face that paves during spiral distributor cloth, on bituminous concrete moxture spiral extreme lower position must cloth to exceeding spiral distributor spiral end face 5-10cm, during to reduce due to spiral distributor rotary work, cause the segregation of compound, increase the object evenly transmitted;

After travelling system of spreader starts, its travel speed at the uniform velocity controls at 1-3m/min,

Four, in transport vehicle, compound is unsnatched, and vehicle drives away immediately, when a upper car drives away, compound in hopper be kept to be not less than 1/5; And forbid to receive bucket, carry out the material feeding of next car immediately, paver does not stop, and repeats above-mentioned discharging, pave work; Construct every day and finally carried out the receipts bucket of hopper, and cleaned out;

Five, comprehensively observe the asphalt macadam surface that paver has paved, local is occurred to the position of segregation, people stands in segregation position, uses 10mm sieve to sieve to compound, is repaired by lower for sieve compound to segregation position, and levelling;

Six, made up a deficiency arrange immediately to carry out compound roll work, pneumatic-tired rollers must be used during cal rolling to roll first pass, play compacting, rub, impel the uniform filling of fines to enter object in space, till then using two road roller that shakes to roll regulation degree of compaction; No matter adopt which kind of plant equipment to roll, adopt dislocation, angle-park, the mode of rolling of overlap joint rolls;

Seven, after having rolled, until mixture temperature to drop to after atmospheric temperature just open to traffic thoroughly, to ensure to there will not be in the too high situation down train of temperature, cause wheelmark, situation that loose and planeness reduces occurs.

Of the present invention beneficial effectfor: the method adopting the present invention above-mentioned, after practice of construction operates, finds the dense surface of the compound of having constructed, even, the mutual embedded squeezing of thickness material bonds, segregation Fundamental Solutions is determined.Water permeability obviously reduces, and degree of compaction improves, and uniformity improves, elementary solution mixture segregation situation.We use normal construction method and the inventive method to construct respectively at the construction field (site), and degree of compaction, infiltration coefficient are measured, its result is as follows: do not adopt normal construction method of the present invention to detect degree of compaction 11 point, average 94.2%, standard deviation 0.96%, maximum value and minimum value difference 2.5%; Detect infiltration coefficient 25 point, average 258ml/min, standard deviation 17.75ml/min, maximum value and minimum value difference 67ml/min.Degree of compaction 13 point is detected, average 95.0%, standard deviation 0.72%, maximum value and minimum value difference 1.9% after adopting construction method of the present invention; Detect infiltration coefficient 35 point, average 215ml/min, standard deviation 9.07ml/min, maximum value and minimum value difference 36ml/min.Found by the contrast of above-mentioned data, the degree of compaction on the road surface of having constructed after adopting method of the present invention significantly improves, and deviation is less, and uniformity is fine; Infiltration coefficient obviously reduces, and deviation is less, and uniformity is fine, totally reaches the object controlling segregation.Adopt this method not need to change original construction equipment simultaneously, after only little adjustment being carried out to equipment, can construct, not increase cost, but improve construction pavement quality.

Detailed description of the invention

be below the present inventionadopt method of the present invention to carry out the specific embodiment of constructing when certain speedway contract section is constructed, its detailed process is:

One, asphalt remixer is in place, require that lower position adjusted to by paver screw distributing device; Screed horizontal wall inscription has adjusted, and the faulting of slab ends of two pieces of screeds is within 1mm, and heating-up temperature has arrived 100 degree;

Two, according to before, during and after vehicle three sections, upper and lower two-layer requirement is by the compound entrucking of segmentation, layering, be transported to job site, vehicle is in asphalt paver travel direction, and at the position temporary shut down of distance 100-200 rice, then reversing is stopped to during distance paver 20-30cm, waits for that paver promotes transport vehicle tire running, and when paver contact transport vehicle, vehicle opens top; Side board is once raised to the positions of 40 to 50 degree, make compound evenly, concentrate and drop in the hopper of paver;

Three, when compound is discharged to 2/3 position of paver hopper, start spiral distributor and stock guide, compound is longitudinally carried the position obtaining paver screw distributing device, batch turning speed and the distributing device speed of batch turning plate match, and do not occur the situation of windrow, fracture; Spiral distributor is utilized compound to be laterally transported to uniformly the whole face that paves of paver, compound to be covered with on the whole face that paves during spiral distributor cloth, on bituminous concrete moxture spiral extreme lower position must cloth to exceeding spiral distributor spiral end face 5-10cm, during to reduce due to spiral distributor rotary work, cause the segregation of compound, increase the object evenly transmitted;

After travelling system of spreader starts, its travel speed at the uniform velocity controls at 1-3m/min;

Four, in transport vehicle, compound is unsnatched, and vehicle drives away immediately, when a upper car drives away, compound in the hopper by paver be kept to be not less than 1/5; And forbid to receive bucket, carry out the material feeding of next car immediately, paver does not stop, and repeats above-mentioned discharging, pave work; Construct every day and finally carried out the receipts bucket of hopper, and cleaned out;

Five, comprehensively observe the asphalt macadam surface that paver has paved, local is occurred to the position of segregation, people stands in segregation position, uses 10mm sieve to sieve to compound, is repaired by lower for sieve compound to segregation position, and levelling;

Six, made up a deficiency arrange immediately to carry out compound roll work.Pneumatic-tired rollers must be used during cal rolling to roll first pass, play compacting, rub, impel the uniform filling of fines to enter object in space, till then using two road roller that shakes to roll regulation degree of compaction.No matter adopt which kind of plant equipment to roll, adopt dislocation, angle-park, the mode of rolling of overlap joint rolls;

Seven, after having rolled, certain extend the open to traffic time, make mixture temperature drop to open to traffic after atmospheric temperature thoroughly, to ensure to there will not be in the too high situation down train of temperature, cause wheelmark, situation that loose and planeness reduces occurs.

After adopting method of the present invention by reality, find the dense surface of the compound of having constructed, even, the mutual embedded squeezing of thickness material bonds, segregation Fundamental Solutions is determined.Water permeability obviously reduces, and degree of compaction improves, and uniformity improves, elementary solution mixture segregation situation.Adopt this method not change original construction equipment simultaneously, after only little adjustment being carried out to equipment, can construct, not increase cost, but improve construction pavement quality.

Claims (1)

1. control a method for the on-the-spot Segregation of asphalt macadam, it is characterized in that, its method step is:

One, asphalt remixer is in place, require that lower position adjusted to by paver screw distributing device; Screed horizontal wall inscription has adjusted, and the faulting of slab ends of two pieces of screeds is within 1mm, and heating-up temperature arrives l00 degree Celsius;

Two, according to before, during and after vehicle three sections, upper and lower two-layer requirement is by the compound entrucking of segmentation, layering, be transported to job site, vehicle is in asphalt paver travel direction, and at the position temporary shut down of distance 100-200 rice, then reversing is stopped to during distance paver 20-30cm, waits for that paver promotes vehicle tyre and travels, and when paver contact vehicle, vehicle opens top; Side board is once raised to the positions of 40 to 50 degree, make compound evenly, concentrate and drop in the hopper of paver;

Three, when compound is discharged to 2/3 position of paver hopper, start spiral distributor and stock guide, compound is longitudinally transported to the position of paver screw distributing device, batch turning speed and the distributing device speed of batch turning plate match, and do not occur the situation of windrow, fracture; Spiral distributor is utilized compound to be laterally transported to uniformly the whole face that paves of paver, compound to be covered with on the whole face that paves during spiral distributor cloth, on bituminous concrete moxture spiral extreme lower position must cloth to exceeding spiral distributor spiral end face 5-10cm, during to reduce due to spiral distributor rotary work, cause the segregation of compound, increase the object evenly transmitted;

After travelling system of spreader starts, its travel speed at the uniform velocity controls at 1-3m/min;

Four, in vehicle, compound is unsnatched, and vehicle drives away immediately, when a upper car drives away, compound in hopper be kept to be not less than 1/5; And forbid to receive bucket, carry out the material feeding of next car immediately, paver does not stop, and repeats above-mentioned discharging, pave work; Construct every day and finally carried out the receipts bucket of hopper, and cleaned out;

Five, comprehensively observe the asphalt macadam surface that paver has paved, local is occurred to the position of segregation, people stands in segregation position, uses 10mm sieve to sieve to compound, is repaired by lower for sieve compound to segregation position, and levelling;

Six, made up a deficiency arrange immediately to carry out compound roll work, pneumatic-tired rollers must be used during cal rolling to roll first pass, play compacting, rub, impel the uniform filling of fines to enter object in space, till then using two road roller that shakes to roll regulation degree of compaction; No matter adopt which kind of plant equipment to roll, adopt dislocation, angle-park, the mode of rolling of overlap joint rolls;

Seven, after having rolled, until mixture temperature to drop to after atmospheric temperature just open to traffic thoroughly, to ensure to there will not be in the too high situation down train of temperature, cause wheelmark, situation that loose and planeness reduces occurs.