增压防淤堵真空预压法在某道路工程中应用研究

Study on the Application of Vacuum Preloading Method Based on Pressurization and Anti-silting in a Road Project

通过表层沉降监测、平板载荷试验、室内土工试验和十字板剪切试验等多种手段,对采用"增压防淤堵真空预压法"的某道路工程试验段软基处理效果进行综合分析。分析结果表明:软基处理后,排水板插设深度范围内地基土物理力学性质均有明显改善,但真空预压效果随孔深增加逐渐减弱。真空预压时,增压管能有效改善增压管长度范围及其底部以下约3m范围土体物理力学性质。

The effect of the soft foundation treatment in the test section of a road project of ＂ vacuum preloading method based on pressurization and anti-silting＂ was investigated by the various means,such as surface subsidence monitoring,plate loading test,laboratory soil test and vane shear test. Analysis results showed that the physical and mechanical properties of the foundation soil in the depth range of the drainage plate were improved obviously,but the effect of vacuum preloading decreased with the increasing of hole depth after the soft foundation treatment; the physical and mechanical properties of the soil in the length of the pressurized pipe and the 3m range below the bottom was improved effectively by the pressurized pipe when the vacuum preloading.