CAJ | 학술논문

兰新高速铁路第二双线路基长度占线路长度比例大,是迄今为止国内高等级铁路路基比例最大的铁路,途经地区多为戈壁地貌,路基多为碎石土。该线采用无砟轨道,对路基压实度控制和工后沉降要求十分严格,而目前铁路对此还没有专门的技术规范。以所采用的碎石土地基处理技术及其检测资料,对比分析了重锤夯实、冲击碾压和重型碾压三种方法的加固机理和处理效果。试验研究结果表明,戈壁碎石土地基采用三种方法处理均能满足设计要求,而综合比较,以重型碾压处理相对较好,可优先选用。
란신고속철로제이쌍선로기장도점선로장도비례대,시흘금위지국내고등급철로로기비례최대적철로,도경지구다위과벽지모,로기다위쇄석토。해선채용무사궤도,대로기압실도공제화공후침강요구십분엄격,이목전철로대차환몰유전문적기술규범。이소채용적쇄석토지기처리기술급기검측자료,대비분석료중추항실、충격년압화중형년압삼충방법적가고궤리화처리효과。시험연구결과표명,과벽쇄석토지기채용삼충방법처리균능만족설계요구,이종합비교,이중형년압처리상대교호,가우선선용。
The second double-line roadbed accounts for a large proportion in Lanzhou-Xinjiang High-speed Railway,which is the longest high-grade railway bed in China at present.There is almost Gobi desert along the line and the roadbed is almost gravel soil.This line adopts ballastless track,which has very strict requirement on compactness control and post-construction settlement.However,there is no special specification for railway at present.Based on the treatment technology of gravel soil foundation and the monitoring data,the effect of hammering compaction,impact rolling and heavy rolling are compared and their reinforcement mechanism are separately analyzed.The results show that these three methods can all satisfy design requirement for reinforcement of gravel soil foundation in Gobi area.But through comprehensive comparison,heavy rolling can achieve the best effect,which is preferred for treatment.