Abstract

To understand the impact of the surcharge loading rate (SLR) on the prefabricated horizontal drain (PHD)-vacuum preloading reinforcement dredged fills, four sets of indoor model comparison tests were carried out to analyze and compare the soil surface settlement, lateral displacement, displacement, pore water pressure, vane shear strength, and water content. The degree of consolidation and bearing capacity calculations show that the surcharge loading–PHD-vacuum preloading scheme can effectively improve the soil reinforcement effect, effectively restrain the lateral displacement of the soil during the consolidation process, and improve its stability. The greater the SLR, the better the reinforcement effect and the smaller the lateral displacement; however, this increase is not significant. The optimal SLR found in this study is 4 kPa/d.

摘要

为了解堆载率（SLR）对预制水平排水沟（PHD）-真空预压加固疏浚填方的影响，进行了四组室内模型对比试验，对土体表面沉降、侧向位移、位移进行了分析比较。 、孔隙水压力、叶片剪切强度和含水量。固结度和承载力计算表明，堆载-PHD-真空预压方案能够有效提高土体加固效果，有效抑制固结过程中土体的侧向位移，提高其稳定性。SLR越大，加固效果越好，横向位移越小；然而，这种增加并不显着。本研究中发现的最佳 SLR 为 4 kPa/d。