工程地质学报2013，Vol.21Issue(1)：123-128,6.
青藏高原典型冰碛土的物理力学特性研究
PHYSICAL AND MECHANICAL PROPERTIES OF TYPICAL MORAINE SOIL ON THE QINGHAI-TIBET PLATEAU
方学东 1黄润秋2
作者信息
- 1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室 成都 610059
- 2. 中国民航飞行学院研究生处 广汉 618307
- 折叠
摘要
Abstract
There were many times of glacial actions during the pleistocene global ice ages in the Qinghai-Tibet Plateau that is well-known as the roof of the world, leaved a lot of glacial traces. The moraine soil belongs to the special engineering soils, which has complicated composition, mixed structure and changeable physical and mechanical properties. The moraine soil is usually confused with diluvium and eluvium. The site of constructing Yad-ing airport is located at Daocheng Haizi Mountain. Its foundation soil is a typical Qinghai-Tibet Plateau moraine soil, and stacked up after the Daocheng ice cap melt. In order to master the moraine's special physical and mechanical properties, and reveal the relationship between moraine's properties and the glacier evolution, the composition analysis, physical and mechanical properties testing, and ESR dating were carried out during the Yading airport foundation survey. Research shows that the moraine soil of Yading airport, stacked up during 37±5ka BP and compacted by the glacier, has the characteristics of higher density, lower void ratio, higher foundation deformation modulus and bearing capacity. Moraine soil belongs to the over-consolidated soils (average preconsolidation pressure
is about 290kPa) and can be used as a good natural foundation of major engineering in the Qinghai-Tibet Plateau.关键词
青藏高原/冰碛土/物理特性/力学特性Key words
Qinghai-Tibet Plateau/Moraine soil/Physical properties/Mechanical properties分类
天文与地球科学引用本文复制引用
方学东,黄润秋..青藏高原典型冰碛土的物理力学特性研究[J].工程地质学报,2013,21(1):123-128,6.
