What is the maximum road load of the standard axle load BZZ 100

100kn = tons.

Cumulative equivalencies are used in pavement design.

The concept of the axis. The type of vehicle driving on the road.

There are a lot of them, so you have to choose a standard axle load. According to the current situation and development trend of road car transport vehicles. China's pavement design uses a single axle load of 100KN as the standard axle load of the two-wheel group, which is represented by BZZ-100.

Standard axle load calculation parameters.

When converting various axle loads into standard axle loads, in order to achieve the same effect on the road surface before and after the conversion, two principles should be followed: first, the conversion is based on reaching the same critical state, that is, for the same kind of pavement structure, the pavement reaches the predetermined critical state after the axle load action n1 times, and the pavement is deflected.

is L1, the axle load of B pavement reaches the same critical state The number of action times is N2, and the deflection is L2, and the axle load action of A and B is equivalent at this time. The conversion relationship between the two axle load times should be established according to this equivalent principle; Second, for a certain kind of traffic composition, no matter what kind of axle load standard is used to convert the axle load, the pavement thickness calculated by the converted axle load action times is the same.

When the design deflection value is used as the design index and the bottom tensile stress of the asphalt layer is checked, the number of times Ni of the axle load at all levels (including the front and rear axles of the vehicle) with axle load greater than 25kN is converted into the equivalent action times n of the standard axle load p according to the following formula.

Where: n - the equivalent axis of the standard axle load, the next day;

ni - the number of axle load actions of the various levels of the converted vehicle, the next day;

P - standard axle load, kn;

PI - the axle load of the various levels of the converted vehicle, kn;

k - the number of types of vehicles to be converted;

c1 - axis number coefficient, c1 = 1+, m is the number of axes. When the shaft spacing is greater than 3m, it is calculated according to a separate axle load, and when the shaft spacing is less than 3m, the axis number coefficient should be considered;

C2 - wheel coefficient, single wheel, double wheelset is 1, four-wheel set is.

When the bottom tensile stress of the semi-rigid base layer is calculated, the action times Ni of all levels of axle load (including the front and rear axles of the vehicle) with axle load greater than 50 kN are converted into the equivalent action times of the standard axle load p n' according to the following formula.

Where: c1'—axis coefficient, c2'=1+2(m 1);

c'2 - wheel coefficient, single wheel, double wheel, four.

The above axle load conversion formula is only applicable to axle load conversion with a single axle load less than 130 kN. For urban roads.

For the pavement design, please refer to the relevant provisions of the urban road design code for axle load conversion.

Due to the number of lanes and lane width of the road.

The frequency of wheel track distribution in the transverse direction is also different, that is, the actual number of axle load repetitions at each point of the road surface decreases with the increase of the number of lanes and the width of the lanes. For this reason, China's asphalt pavement code introduces lane coefficients to account for this effect. The lane coefficient is the ratio of the lateral distribution frequency of traffic on each multi-lane road surface to the lateral distribution frequency (maximum) on a single lane.

The pavement design uses a single axle load of 100KN as the standard axle load of two wheel sets, which is represented by BZZ-100. The pavement is designed using the concept of cumulative equivalent axes. But the type of vehicle driving on the road.

There are a lot, so it is necessary to select a standard Chang quasi-axle load. Single-axle double-wheel set 100kn is the rear wheel is a single-axle double-wheel set, bearing a weight of 10t, and the pressure of each wheel is.

Standard axle load calculation parameters.

When converting various axle loads to standard axle loads, two principles should be followed in order to achieve the same effect on the road surface before and after the conversion

First, the conversion is based on reaching the same critical state, that is, for the same pavement structure, the pavement reaches a predetermined critical state after the axial load of A is n1 times, and the pavement is deflected.

is L1, the axial load of B road surface reaches the same critical state, the height of the secondary wheel is N2, and the deflection is L2. The conversion relationship between the two axle load times should be established according to this equivalent principle;

Second, for a certain kind of traffic composition, no matter what kind of axle load standard is used to convert the axle load, the pavement thickness calculated by the converted axle load action times is the same.