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真空预压法做为一种加固软土地基的有效方法,已经被广泛用于沿海地区公路软土地基加固当中.为了研究真空预压法在深厚软土中的加固效果,通过现场试验的方法,对采用真空预压加固公路软基的一个试验段进行了分层沉降、孔隙水压力、表面沉降和水平位移的现场观测,并对观测结果进行了分析.最后,通过现场取样和室内试验的方法,对加固前后的土体抗剪强度指标等物理力学性能指标进行对比,对比发现,加固后地基土的力学性能得到较大的提高,对真空预压法在南沙深厚软土中的应用提供了设计依据.图9,表2,参6.
As an effective method to reinforce soft soil foundation, vacuum preloading has been widely used in the consolidation of soft ground in coastal areas.In order to study the reinforcement effect of vacuum preloading in deep soft soil, , Conducted a site observation of stratified subsidence, pore water pressure, surface settlement and horizontal displacement of a test section reinforced by vacuum preloading, and analyzed the observation results.Finally, through field sampling and laboratory tests Method to compare the physical and mechanical properties such as the shear strength index of soil before and after consolidation. It is found that the mechanical properties of the soil after foundation consolidation are greatly improved, and the application of vacuum preloading in deep thick soft soil of Nansha The design basis. Figure 9, Table 2, reference 6.