温度对机场水泥道面接缝传荷能力的影响实测分析

Analysis on Measured Influence of Temperature on Load Transfer Capacity of Cement Pavement Joint in Airport

针对企口缝(无拉杆)和假缝(无传力杆),在华东某机场开展了不同温度状况下的水泥道面接缝传荷能力的实地跟踪测量,结论如下:温度对假缝(无传力杆)的传荷能力影响显著,对企口缝(无拉杆)的传荷能力有一定影响,但随着温度增大,温度对传荷能力的影响越来越小;假缝(无传力杆)和企口缝(无拉杆)的传荷能力与温度均呈现良好的二次相关关系,且随着温度增大,接缝传荷能力不断增大;假缝(无传力杆)的传荷能力具有显著的方向性,而企口缝(无拉杆)的传荷能力方向性差异较小。

Aiming at the tongue-and-groove joint(no pull bar) and dummy joint(no force transfer bar), the field tracking measurements of load transfer capacity of cement pavement joint are carried out in an airport of the East China. The conclusion is that the influence of temperature on the load transfer capacity of the dummy joint(no force transfer bar) is obvious, and the temperature has a certain influence on the load transfer capacity of tongue-and-groove joint(no pull bar). But along with the increment of temperature, the temperature will have the influence on the load transfer capacity smaller and smaller. There is a good quadratic correlation between the load transfer capacities of the tongue-and-groove joint(no pull bar) and dummy joint(no force transfer bar) and the temperature. And with the increment of temperature, the load transfer capacity of joint continuously increases. The load transfer capacity of dummy joint(no force transfer bar) has the obvious directivity, but the tongue-and-groove joint(no pull bar) has the little difference of directivity.