Advances in Materials Science and Engineering / 2019 / Article / Tab 3

Research Article

Driving Comfort Evaluation for Manhole Covers and Pavement around Manholes

Table 3

Influencing factors and evaluation of driving comfort.

Influencing factors (m/s2)Driving comfort degree

Driving speed (km/h)100.533A little uncomfortable
200.663A little uncomfortable
300.849Uncomfortable
401.063Uncomfortable
501.291Quite uncomfortable
601.526Quite uncomfortable
701.766Quite uncomfortable
802.009Extremely uncomfortable

Longitudinal slope value (%)10.525A little uncomfortable
20.631A little uncomfortable
30.790A little uncomfortable
40.975Uncomfortable
51.176Uncomfortable
61.384Quite uncomfortable
71.598Quite uncomfortable
81.814Quite uncomfortable

Tire damping coefficient (104 N·s/m)0.11.106Uncomfortable
0.50.975Uncomfortable
10.851Uncomfortable
20.692A little uncomfortable
80.545A little uncomfortable
200.638A little uncomfortable
400.754A little uncomfortable
1000.911Uncomfortable

Manhole cover stiffness coefficient (N/m)1021.423Quite uncomfortable
1031.420Quite uncomfortable
1041.395Quite uncomfortable
1051.220Uncomfortable
1060.977Uncomfortable
1070.975Uncomfortable
1080.979Uncomfortable
1090.979Uncomfortable

Height difference caused by damage to pavement around manhole (cm)0.50.901Uncomfortable
10.975Uncomfortable
21.184Uncomfortable
31.443Quite uncomfortable
41.730Quite uncomfortable
52.033Extremely uncomfortable
62.346Extremely uncomfortable
82.989Extremely uncomfortable

Subsidence of manhole (cm)0.50.968Uncomfortable
10.975Uncomfortable
21.019Uncomfortable
31.095Uncomfortable
41.198Uncomfortable
61.461Quite uncomfortable
81.769Quite uncomfortable
102.104Extremely uncomfortable

Tire stiffness coefficient (105 N/m)10.405Slightly uncomfortable
20.623A little uncomfortable
40.871Uncomfortable
81.227Uncomfortable
161.650Quite uncomfortable
321.780Quite uncomfortable
641.706Quite uncomfortable
1281.622Quite uncomfortable

Considering Vibration of manhole cover or notYes0.975Uncomfortable
No0.830Uncomfortable

Diving directionUphill1.099Uncomfortable
Downhill0.975Uncomfortable

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