【摘要】 <正>天山乌鲁木齐河源1号冰川人工冰洞研究的基本情况和主要结果,前已发表。这里着重介绍洞壁应变观测,分析其应变规律,进而估算其应力状态,深入探讨该冰川内部的流动特征。一、测点布置与观测方法如图1所示,在冰洞靠近冰川中心一侧的洞壁,一共布置了16个应变观测圆以观测其变形,16个应变观测圆组成6个观测断面,其中A、B、C和E、F断面分别由两个观测更多还原

【Abstract】 16 strain circles were fixed to the ice wall of the artificial tunnel their deformation was observed regularly, strain tensor calculated and stress tensor estimated also. Therefore the space variation characteristic of strain tensor and stress tensor inside the tunnel was made clear, very useful for studying the dynamical process within a glacier.The ice wall inside the tunnel, 60 m long or so, was in a compressive state with the hydrostatic pressure about 40 kPa and the principal compression stress about 100-200 kPa. The area contract ratio on the wall changed from 1.7 to 11×10 -2 year-1. The strain rate and compression stress increased from the interior to the exterior. While the inclination of principal compression stress, formed by the minor principal axis and the horizontal line(<90 ), gradually decreased from 62 iaside (Section E & F) to 30 (Section A) near the entry.更多还原