郑西客专陕西段路基湿陷性黄土地基处理简介_王应铭.pdfVIP

第 30 卷增刊 2 岩 土 力 学 Vol.30 Supp.2 2009 年 12 月 Rock and Soil Mechanics Dec. 2009 文章编号：1000－7598 (2009) 增刊 2 －0283 －04 郑西客专陕西段路基湿陷性黄土地基处理简介 王应铭，李肖伦 （中铁第一勘察设计院集团有限公司，西安 710043 ） 摘 要：郑州至西安铁路客运专线为时速 350 千米的无砟轨道铁路，其路基竣工后不允许发生 15 mm 以上的沉降，为满足 该要求，开展了相关试验研究，确定了湿陷性黄土地基处理原则，采用水泥土挤密桩、长短桩及埋入式连续桩板结构成功地 对地基进行了处理，取得的成果对即将修建的西宝客专、宝兰客专、西成客专及大西客专具有借鉴意义。 关 键 词：湿陷性黄土；客运专线；无砟轨道；沉降观测 中图分类号：TU 444 文献标识码：A Introduction to treatment of collapsible loess subgrade for Shaanxi section of Zhengzhou-Xi’an passenger dedicated railway line WANG Ying-ming, LI Xiao-lun (China Railway roadbed department, First survey and design institute Ltd., Xi’an 710048, China) Abstract: Zhengzhou-Xi’an passenger dedicated railway line is 350 kilometers per hour ballastless track; its allowable subgrade settlement should be less than 15 mm after completion of the subgrade. In order to meet the requirements, the relevant tests are carried out; and the collapsible loess subgrade treatment principles are determined. And the subgrade are treated successfully by using cement-soil compacted piles, long and short piles and embedding continuous pile-board structure. The achievement will be reference to the upcoming construction of Xi’an-Baoji passenger dedicated line, Baoji-Lanzhou passenger dedicated line, Xi’an-Chengdu passenger dedicated line. Key words: collapsible loess; passenger dedicated lines; ballastless track; treatment prediction 1 引 言 平顺，但扣件的抬高量是相当有限的。为此，路基 的工后沉降量不允许超