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前 言 日本道路公团,把用弯沉仪测定弯沉的试验做为土基、路面基层的管理试验及沥青路面结构强度评定的一种手段,用得很多。 过去对于用弯沉仪测定弯沉,一直争论温度及荷载修正、梁脚的下沉及测定仪的规格化等问题。可是最近又提出了测试使用的标准车型问题。即现在规定的标准车是8吨的单后轴卡车(以下叫单后轴车),因为近年来随着汽车的大型化,这种车型日趋减少。因此,提出了要以道路行驶的主要车型即以10吨的双后轴车(以下叫双后轴车)作为试验标准车。
Preface The Japanese road corps, the deflection measured deflection test as a foundation, pavement grassroots management tests and assessment of asphalt pavement strength as a means of much use. In the past, the use of deflectometers to measure deflections has been debated the issue of temperature and load correction, beam foot sinking, and gauge normalization. Recently, however, a standard car model has been proposed for testing. That is to say, the current standard vehicle is an 8-ton single-rear axle truck (hereinafter referred to as “single-rear axle truck”), which has been declining with the increase of vehicles in recent years. Therefore, it is proposed that the main vehicle to be driven on the road is a trial-standard vehicle with a 10-ton twin rear axle (hereinafter referred to as a double rear axle).