扰动对软土累积排水量影响试验研究

Experimental investigation of disturbance to cumulative drainage volume on soft soils

为研究扰动对软土排水特性的影响,在各扰动状况下进行了一系列软土振动排水试验。试验中考虑了扰动时长、频率、围压和一定的停歇时长,并分析了各工况下软土的累积排水量。结果表明,扰动会明显弱化振动排水处理效果,减少累积排水量。扰动程度越高,排水量降幅越明显。扰动程度与扰动时长、频率成正比,与围压成反比。此外,扰动后的停歇有利于恢复软土的结构性和渗透性,并增加累积排水量,累积排水量的提升效果与停歇时长成正比,与围压成反比。

In order to study the influence of disturbance on the drainage characteristics of soft soil,a series of soft soil vibration drainage tests under different disturbance conditions are carried out.Different disturbance durations,frequencies,confining pressures and certain rest durations are considered in the test,with the cumulative drainage volume of soft soil under each conditions analyzed and compared.The results show that the disturbance obviously weakens the reinforcement effect of vibration drainage and reduces the cumulative drainage volume.The higher the disturbance degree,the more obvious the cumulative drainage.The disturbance degree is directly proportional to the disturbed duration and frequency and inversely proportional to the confining pressure.In addition,the duration after disturbance is useful to recover the structure and permeability of soft soils and increase the cumulative drainage.The improvement effect is directly proportional to the duration and inversely proportional to the confining pressure.