塑料排水板在处理海域公路深厚软基中的运用

通过在采用塑料排水板处理海域公路深厚软基的断面埋设试验仪器,对路基打设塑料排水板前后的沉降进行对比,得出塑料排水板处理海域软基初期3月内沉降达1 252 mm,约占设计沉降量50%。同时从地表沉降、孔隙水压力、深层水平位移及分层沉降四个方面的监测数据分析,得出长期内最大超静孔隙水压力分布在20~28 m处,深层水平向及竖向最大位移均在距地表1~7 m内。最后提出塑料排水板处理海域软基的相关理论公式。

Deep Soft Ground Treated with PVD on Sea-wall Highway

The test instruments are installed at the typical section of the sea-wall highway, whose deep soft ground is treated with PVD. The settlement data is contrasted before and after the set of plastic drainage,the conclusion is that the settlement in the first three months is about 1252mm,50% of the design settlement. The long-term performance of the effect of the plastic drainage belt is analyzed by surface settlements, pore water pressures, deep horizontal displacements and layered settlements. The maximum excess pore water pressure is between the deep 20m and 28m. The maximum deep horizontal displacement and layered settlement is in the deep from 1m to 7m.Some theoretical formulas which are useful in the area treated with PVD are provided at last.