摘要
为了对南京地铁10号线过江隧道盾构始发端头的加固设计提供参考依据,本文取始发端头两种典型土质进行了水泥改良前后土体冻结温度及力学特性的室内试验研究。结果表明:冻结温度均随水泥掺量和养护龄期的增大而减小,淤泥质粉质黏土的冻结温度低于粉砂、细砂的冻结温度;不同土质不同温度下的无侧限抗压强度和弹性模量均随着水泥掺量和养护龄期的增大而线性增大;不同土质无侧限抗压强度和弹性模量均随着温度的降低而线性增大。
In order to provide a reference for the reinforcement design of shield originating end in crossing-river tunnel of Nanjing Subway Line 10, this paper tested the freezing temperature and mechanical properties of two typical soils in originating end before and after the cement improvement. The experiment results showed that the freezing temperature decreases with the cement content and curing time increasing, the freezing temperature of silty clay is lower than that of sand and fine sand, the unconfined compressive strength and elastic modulus of different soils in different temperature linearly increase with the cement content and curing time increasing, and the unconfined compressive strength and elastic modulus of different soils linearly increase with the temperature decreasing.
出处
《铁道建筑》
北大核心
2013年第4期156-159,共4页
Railway Engineering
基金
海南大学科研启动基金资助项目(kyqd1241)
关键词
南京地铁
冻结温度
无侧限抗压强度
弹性模量
Nanjing subway
Freezing temperature
Unconfined compressive strength
Elastic modulus
