Title Study on in-situ test on mechanical properties of the particle improved roadbed in permafrost
Author Huang Mingkui
Author Affil Huang Mingkui, Jiaotong University, School of Civil Engineering and Architecture, Chongqing, China
Source Cold Regions Science and Technology, 61(2-3), p.132-135, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date May 2010
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309572
Index Terms bearing strength; construction materials; deformation; loading; mechanical properties; permafrost; shear modulus; tests; thawing; bearing capacity; deformation modulus; elastic constants; elastic materials; freeze-thaw cycles; in situ; roads; testing; three-dimensional models
Abstract The adoption of particle improved roadbed (PIR) is one of the proactive measures to protect permafrost from warming and thawing in cold regions. The field plate loading test was performed to study the mechanical parameters of fillings after a freeze-thaw cycle, including bearing capacity, modulus of deformation, etc. In addition, the deformation features of the roadbed fillings were analyzed and discussed. The results indicated that the allowable bearing capacity of the roadbed fillings was 418.78 kPa, and the deformation modulus and shear modulus decreased with the increase of the loads. It is reasonable to consider the roadbed fillings as a three-dimensional elastic continuous medium to establish a model to study deformation of permafrost. The calculated deformation agreed well with the measured. Therefore, the model can provide reference for the deformation predication of other roadbed fillings in permafrost.
URL http://hdl.handle.net/10.1016/j.coldregions.2010.01.007
Publication Type journal article
Record ID 65006536