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理论和实践均表明 ,采用排水固结法时 ,路基中线处的最终沉降与路基填土厚度或最终填土高度成正比。根据最终沉降 -填土厚度拟合曲线可以推算设计荷载下的最终沉降 ,进行超载设计 ;利用预压期的监测资料推算的最终沉降可以得到设计荷载下的沉降和剩余沉降 ,进行卸载时机的判断。卸载时机还可以利用沉降速率法、有效应力面积比或有效应力系数法进行判断
Both theory and practice show that the final subsidence at the midline of subgrade is proportional to the thickness of subgrade fill or final filling height when using drainage consolidation method. According to the final settlement-fill thickness curve, the final settlement under the designed load can be calculated and designed for overloading. The settlement and residual settlement under the designed load can be obtained by using the final settlement estimated from the monitoring data of the pre-compression period, and the timing of unloading can be judged . The timing of unloading can also be determined using the sedimentation rate method, the effective stress area ratio or the effective stress coefficient method