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在软土地区既有铁路线旁修建复线时,为控制施工期沉降与工后沉降,保证既有线路与新建线路的稳定性,对新建复线的深层软基加固区,通过现场试验采用6种方法分7个观察项目进行了对比研究。试验结果表明:无论是沉降分析、稳定分析或是对既有线的影响分析,用粉喷桩加固地基比用砂井、插塑板及土工布加固地基均有着显而易见的优越性,相对来说短而密的粉喷桩较长而疏的粉喷桩加固效果更好。
In order to control the settlement and post-construction settlement during the construction period and ensure the stability of the existing line and the new line during the construction of the double-line at the existing railway line in the soft soil area, Methods divided into seven observation items were compared. The test results show that both the settlement analysis, the stability analysis or the analysis of the influence on the existing line have obvious advantages compared with the sand foundation, the plastic injection molding board and the geotextile reinforced foundation by the DJM pile. Relatively speaking, The dense powder spray pile longer and sparse powder spray pile reinforcement better.