For the frequency within a certain width (such as wheel track width) on the road cross-section, that is, the ratio of the number of vehicle actions within the width range to the total number of actions passing through the cross-section is called the wheel track lateral distribution coefficient.

When driving on the road, the lateral distribution of wheel tracks is uneven. In fact, the track of the vehicle is only a certain width, and the vehicle can only cover a small part when passing by. Therefore, the number of times the axle load acts on each point on the cross section of the pavement is only a part of the total axle load passing through the cross section.

The frequency within a certain width (such as the width of wheel tracks) on the cross section of pavement is called the transverse distribution coefficient of wheel tracks. Multiplying this coefficient by the cumulative action times of various axle loads, the fatigue action times of each point on the cross section of pavement structure can be obtained.

Extended data

After the bridge is widened, it will encounter problems such as uneven settlement of the old and new bridges, unstable joints, cracking and collapse of the bridge, and changes in the lateral distribution coefficient of the bridge. Although these accidents rarely happen, once they happen, they will bring disastrous damage and injury to bridges, road routes and traffic.

Even if the bridge does not collapse, it will have an impact on the stability and ride comfort of the bridge and pavement, which will bring hidden dangers to driving. Chinese researchers have done a lot of research and discussion on bridge widening.

On June 26th, 2006, Zhang Yong and Liu Bin from the School of Resources and Civil Engineering of Northeastern University analyzed the advantages and disadvantages of the scheme of no connection, rigid connection and hinge according to the actual widening project of the old and new Yellow River Bridge on Ningxia Ginko Expressway.

By calculating the internal force and deformation of different widening schemes, the feasibility of the new and old bridge disconnection scheme is put forward, and EMR resin+special steel and rubber longitudinal joints are successfully set up. The effect of operation and opening to traffic shows the effectiveness of this connection mode.

On June 30th, 2007, Liu and Zou Zhiquan of Sichuan Road and Bridge Construction Co., Ltd. discussed the construction of N 1 widening bridge of Chengdu Third Ring Road Chengmian Interchange, introduced the reinforced concrete and steel bar construction of N 1 widening bridge, and expounded the "Hilde" steel bar planting technology and the reinforced concrete construction technology at the bottom of the structure.

Baidu Encyclopedia: Horizontal Distribution Coefficient