Study on warm and ice-rich permafrost beneath Qinghai-Tibet Railway embankment with pressiometer

MA Xiao-jie; ZHANG Jian-ming; ZHENG Bo; LI Shuang-yang

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Study on warm and ice-rich permafrost beneath Qinghai-Tibet Railway embankment with pressiometer

更新时间：2026-06-25

- Study on warm and ice-rich permafrost beneath Qinghai-Tibet Railway embankment with pressiometer
- Vol. 29, Issue 3, (2008)
- 作者机构：
  
  1. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点试验室,兰州,730000
  2. 浙江建设职业技术学院,杭州,311231
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU413.4
- Online First：19 July 2013，
  
  Published：2008
- 稿件说明：
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MA Xiao-jie, ZHANG Jian-ming, ZHENG Bo, et al. Study on warm and ice-rich permafrost beneath Qinghai-Tibet Railway embankment with pressiometer[J]. 2008, 29(3).
DOI：

MA Xiao-jie, ZHANG Jian-ming, ZHENG Bo, et al. Study on warm and ice-rich permafrost beneath Qinghai-Tibet Railway embankment with pressiometer[J]. 2008, 29(3). DOI：

摘要

为研究青藏铁路路基下高温-高含冰量冻土的力学性质，在青藏铁路北麓河试验段开展一系列旁压强度试验。试验研究表明：路基的增加引起路基下多年冻土温度升高，未冻水含量增加，最终导致冻土旁压临塑压力Pf下降31 %，旁压极限压力Pl下降44 %，旁压剪切模量Gm下降80 %。对于高温冻结黏土，富冰冻土和饱冰冻土Gm对温度变化的敏感性高于含土冰层；饱冰冻土的Pf和Pl对温度变化的敏感性高于富冰冻土和含土冰层。

Abstract

In order to study the mechanics characters of the warm and ice-rich permafrost beneath the embankment of Qinghai-Tibet Railway

a series of pressiometer tests were conducted in the Beiluhe test site of Qinghai-Tibet Railway. The tests results indicate that: the temperature of the permafrost beneath the embankment gets higher; unfrozen water of the permafrost increases; the critical plastic load Pf descends 31 %; the ultimate load Pl descends 44 % and the shear modulus Gm descends 80 % because of the embankment. For warm permafrost

the sensitivities of shear modulus Gm to the temperature of both ice-saturated and ice-rich permafrost are higher than that of ice with soil inclusions; the sensitivities of the critical plastic load Pf and the ultimate load Pl to the temperature of ice-saturated permafrost are higher than that of ice-rich permafrost and ice layer with soil inclusions.

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Related Institution

Golmud Public Works Section, Qinghai-Tibet Railway Corporation, Golmud

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Graduate University of Chinese Academy of Sciences

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