The consolidation behavior of the sand drain ground during the process of filling the embankment was monitored by the settlement plate, telescoping tube settlement gauge and pore water pressure cell.

• 采用沉降板、分层沉降仪、孔隙水压力计等仪器,对路基分层填筑过程中砂井地基的固结规律进行监测,保证了路基的安全填筑。