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K_30荷载板测试车是为了适应大秦线重载路基土工试验要求研制的。荷载板试验装置在国外多用于确定道路、飞机跑道基础部分的地基系数。过去我国路基质量只检查密度、湿度。大秦线重载路基除密度、湿度外还需要检查压强。另外荷载板试验还能弥补因核子仪在粗粒土(砂夹石)测试误差过大的缺陷,并且机动性能强,测试速度快。因此,在大秦线施工中,采用国外较普遍使用的荷载板试验装置。该装置工作原理是:在一直径30cm荷载板上,施加定量的荷重“g”(kg/cm~2)后,测得荷载板产生的稳定下沉量“y”(cm),则为地基系数“K”(kg/cm~3)。可用下式表示:
K_30 load board test vehicle is designed to meet the requirements of heavy-duty subgrade test of Daqin line. Load board test device used abroad to determine the road, the basic part of the runway foundation coefficient. In the past, the quality of roadbed in our country only checked the density and humidity. In addition to the heavy load on the Qinhuangdao-Qinhuangdao Line, it is also necessary to check the pressure in addition to the humidity. In addition load plate test can make up for the nuclear instrument in coarse grained soil (sand stone) test error is too large defects, and mobility, test speed. Therefore, in the construction of Daqin line, the more commonly used load plate test device abroad. The working principle of the device is that after a fixed load of “g” (kg / cm ~ 2) is applied to a 30cm diameter load plate, the stable subsidence “y” (cm) Coefficient “K” (kg / cm ~ 3). Available under the following formula: