真空-堆载联合预压加固海域吹填土地基的适用性及特点探讨

如今真空-堆载联合预压在我国道路工程软基处理中应用十分普遍,但在海域吹填土地基处理中的应用尚属起步阶段,对其特点和适用性研究存在不足。从真空-堆载联合预压工程实例入手,通过海域与内陆工程的对比得到;海域软黏土具有厚度大,含水率高,孔隙比大,强度低,压缩性大的特点。由于海域软黏土的这些性质导致海域真空-堆载联合预压工程具有沉降量大,沉降速率快,处理后土体固结度低,工后沉降较大等特点。为以后海域真空-堆载联合预压工程的设计施工提供依据。

Feasibility and Characteristics of Vacuum and Surcharge Combined Preloading Improving of Soft Coastal Soil

Now vacuum and surcharge combined preloading technology in soft foundation treatment of road engineering in our country has been widely applied. But in the application of sea reclamation soil foundation treatment is still immaturity and the research on its characteristics and feasibility is insufficient. According to the contrast vacuum and surcharge combined preloading engineering in littoral and inland, we can get the following conclusion: soft coastal soilSis characterized with big thickness, highSwater content, highSporosity,S lowSstrength andShigh compressibilitySetc. Due to the nature of the coastal soil, the vacuum and surcharge combined preloading engineering has large settlement and fast sedimentation rate, low degree of consolidation of soil, after processing larger post-construction settlement etc. This research provide the basis for the coastal soil vacuum and surcharge combined preloading engineering design and construction.