CN102735454A - Pavement structure for drumming road - Google Patents

Abstract

The invention discloses a pavement structure for a drumming road. The pavement structure is characterized in that a structure of a surface cement concrete layer is as follows: all cross sections are the same in thickness along a length direction of a pavement; control points are arranged at a 0.4m interval for flatness data of longitudinal mileage; two adjacent control points are smoothly connected; a control point 1 is at a starting point of the longitudinal mileage; the control points are accumulated in turn at 0.4m intervals; a control point 126 is at a final point of the longitudinal mileage; and the flatness data on the vertical sections from the control point 1 to the control point 126 is arranged according to a preset value. The pavement structure for the drumming road provided by the invention can be used for further testing the low-frequency vibration noise and the frequencies on vehicle body, parts and driving comfort level when a vehicle runs.

Description

A kind of sound pavement structure of beating a drum

Technical field

The present invention relates to a kind of sound pavement structure of beating a drum, more specifically say so low-frequency vibration and noise when being used for detecting running car, and low-frequency vibration and noise be to the influence of vehicle body, each parts and road-ability, thus the performance of testing automobile.

Background technology

The running car noise is relevant with several factors, for example engine, suspension system, kinematic train, air, tire, and pavement behavior etc., be a very complicated problems.

The sound of beating a drum is that a kind of sound frequency is the low frequency noise of 20Hz-250Hz; It mainly is the noise and vibration that the Pingdu situation by the road surface causes; The road vibration excitation is delivered to suspension through tire and axletree, is passed to vehicle body through suspension system again, makes vehicle body produce vibration and acoustic response.Up to now, domestic do not have about automobile is had the open report of the pavement structure of quantitative requirement at the noise of travels down as yet, do not have the relevant criterion or the standard of such road yet.

Shown in Figure 1 is that testing vehicle is by the desired design noise of 40 kilometers/hour go; Curve a and curve b are respectively the upper limit and the lower limit of noise among the figure; Be spaced apart 2dB between the upper limit and the lower limit; Measuring point is driver's auris dextra position, but not relevant at present pavement structure can satisfy this designing requirement.

Summary of the invention

The present invention is for avoiding above-mentioned existing in prior technology weak point; A kind of sound pavement structure of beating a drum is provided; To satisfy the requirement of the pavement noise of setting for testing vehicle under steam; Thereby the low-frequency vibration noise when being used for further detecting running car, with and to the influence of vehicle body, each parts with the driving comfort level.

The present invention adopts following technical scheme for the technical solution problem:

The present invention's sound pavement structure of beating a drum comprises a Road Base body, on said road matrix, is laid with the cement stabilized macadam layer, on said cement stabilized macadam layer, is laid with the Cement Concrete layer; Design feature of the present invention is that the structure of said Cement Concrete layer is set to:

Along on the length direction of road surface, thickness is identical on each transversal section, and vertically the Pingdu data of mileage are a reference mark according to every interval 0.4m; Be level and smooth suitable connecing between adjacent two reference mark; Vertically the starting point of mileage is reference mark 1, and every interval 0.4m adds up successively, and vertically the mileage terminal point is reference mark 126; The Pingdu data are as shown in table 1 on 126 the vertical section from reference mark 1 to the reference mark, and said Pingdu data are meant the difference in height between reference mark and the road surface reference field;

Table 1:

Compared with present technology, beneficial effect of the present invention is embodied in:

1, through measuring, on the present invention beats a drum road surface, sound road, go by 40 kilometers/hour with testing vehicle, the noise that the locational measuring point of driver's auris dextra is detected reaches requirement shown in Figure 1.

2, utilize the present invention road surface, sound road of beating a drum, the low-frequency vibration noise when further testing automobile goes, and to the influence with the driving comfort level of vehicle body, each parts.

Description of drawings

Fig. 1 is that testing vehicle is by 40 kilometers/hour go desired frequency noise and decibel graphs of a relation;

Fig. 2 is a cross-sectional configuration synoptic diagram of the present invention;

Fig. 3 is vertical sectional schematic diagram of selected parts of the present invention;

Fig. 4 is test result synoptic diagram among the present invention.

Embodiment

Referring to Fig. 2, the sound pavement structure of beating a drum in the present embodiment is to comprise a Road Base body 1, on road matrix 1, is laid with cement stabilized macadam layer 2, on cement stabilized macadam layer 2, is laid with Cement Concrete layer 3; The structure of Cement Concrete layer 3 is set to:

Along on the length direction of road surface, thickness is identical on each transversal section, and vertically the Pingdu data of mileage are a reference mark according to every interval 0.4m; Be level and smooth suitable connecing between adjacent two reference mark; Vertically the starting point of mileage is reference mark 1, and every interval 0.4m adds up successively, and vertically the mileage terminal point is reference mark 126; The Pingdu data are as shown in table 1 on 126 the vertical section from reference mark 1 to the reference mark, thereby constitute the particular way spectrum; Wherein, the Pingdu data are meant the difference in height between reference mark and the road surface reference field;

Table 1:

In the practical application,, can be provided with end to end the repetition by structure among the present invention for the length requirement of test section greater than 50m.Such as, the sound road testing track length 200m that beats a drum of required construction, then the road section length with 50m of the present invention amounts to 4 sections, and is end to end between the adjacent highway section, constitutes the whole test section of 200m length:

In the present embodiment, the cement concrete strength grade with Cement Concrete layer of particular way spectrum is C35, and bending tensile strength is 5MPa; The thickness at Cement Concrete layer reference point location place is 30cm; Reference point in the present embodiment is reference mark 96.

For the validity of the sound road pavement structure that confirms to beat a drum, construct to the sound road testing track of beating a drum that Nissan passenger car company of DongFeng Automobile Co., Ltd need build, comprising:

1, the cement dosage by weight percentage in the cement stabilized macadam layer 2 is 4.5%, and the thickness of cement stabilized macadam layer 2 is 25cm, and the unconfined compressive strength typical value is 3MPa;

2, the cement concrete strength grade in the Cement Concrete layer 3 is C35, and bending tensile strength is 5MPa;

3, to press table 1 listed for the vertical section Pingdu data on the Cement Concrete layer, obtains the particular way spectrum, and its vertical section is as shown in Figure 3;

4, obtain test curve c shown in Figure 4 through test, test curve c is between curve a and the curve b among Fig. 4, meets design requirement.

Claims (1)

1. the sound pavement structure of beating a drum comprises a Road Base body (1), on said road matrix (1), is laid with cement stabilized macadam layer (2), on said cement stabilized macadam layer (2), is laid with Cement Concrete layer (3); The structure that it is characterized in that said Cement Concrete layer (3) is set to:

Along on the length direction of road surface, thickness is identical on each transversal section, and vertically the Pingdu data of mileage are a reference mark according to every interval 0.4m; Be level and smooth suitable connecing between adjacent two reference mark; Vertically the starting point of mileage is reference mark 1, and every interval 0.4m adds up successively, and vertically the mileage terminal point is reference mark 126; The Pingdu data are as shown in table 1 on 126 the vertical section from reference mark 1 to the reference mark, and said Pingdu data are meant the difference in height between reference mark and the road surface reference field;

Table 1:

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