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Simulation analysis for model experiment of frozen soil slope(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2004年第01期
Page:
29-32
Research Field:
Publishing date:

Info

Title:
Simulation analysis for model experiment of frozen soil slope
Author(s):
JIN De-wu1; 2; NIU Fu-jun2; CHEN Zhi-xin1; NI Wan-kui1
1 .School of Geological Engineering and Surveying Engineering , Chang'an University , Xi'an 710054, China ; 2 .State Key Laboratory for Frozen Engineering Cold and Arid Region Environment and Engineering Institute , CAS , Lanzhou 730000 , China
Keywords:
frozen soil slope ; integrated analogy method ; model experiment; simulation analysis; thaw slumping
PACS:
P642.14
DOI:
-
Abstract:
A series of construction engineering , such as water resources allocation from south China to north China , Qinghai-Tibet railway construction will affect the slope stability of frozen soil region of Tibet plateau.Model experiment method is an important means to study the instability mechanism affected by natural forces and human activities for frozen slope in Tibet plateau region.According to the 1st law of simulation theory , simulation analysis for frozen slope has been carried out and simulation criterion and index has been set up by using integrated analogy method.It is concluded that 6 simulation parameters can be decreased to 2 and relationship cτ= c2l between 2 parameters will be satisfied.The frozen slope simulation model design and experiment for permafrost at K3035 of Qinghai-Tibet highway based on simulation analysis has been completed .It is shown that characteristics of displacement with time for middle point of slope during 4 freeze-thaw cycles can be observed from simulation model experiment .Experiments also show that slide evidence of middle part of slope soil mass has appeared during first freeze-thaw cycle , and with retrogressive thaw flow slide , slide steep will become next to observing point, a vast scale of slide will certainly take place , till appearance of thaw slumping .Rationality and validity of model design for frozen soil slope has been verified by model test results.

References:

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Memo

Memo:
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Last Update: 2004-03-20