|Table of Contents|

Subgrade top temperature of asphalt pavement structure in permafrost areas(PDF)

长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2012年06期
Page:
16-22,32
Research Field:
Publishing date:

Info

Title:
Subgrade top temperature of asphalt pavement structure in permafrost areas
Author(s):
SI Wei1 MA Biao1 WANG Hai-nian1 QIANG Ba2
1. Key Laboratory of Special Area Highway Engineering of the Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Tibet Autonomous Region Communications Research Institute, Lhasa 850000, Tibet, China
Keywords:
road engineering temperature field numerical simulation gray relational analysis permafrost Qinghai-Tibet highway
PACS:
U416.217
DOI:
-
Abstract:
The stability and durability of road structure in permafrost areas are closely related with the state of permafrost under subgrade. The temperature field model of subgrade and asphalt pavement structure in permafrost areas were established based on the finite element method. The influence of structure thickness and forms on subgrade top temperature were analyzed. Taking the worst pavement structure as reference, the associate degree of different pavement structures was analyzed with the gray relational analysis method. The results show that setting the asphalt macadam layer, graded crushed stone layer or increasing the thickness of pavement structure can reduce the subgrade top temperature effectively in high temperature season. The graded crushed stone layer has significant influence on the relative merits of different asphalt pavement structures. When it is less than 16 cm, the ACGR, AGR and ACR asphalt pavement structures have good roadbed temperature stability, while when it is more than 16 cm, the ACGR, ACG and AGR have good roadbed temperature stability. The study results can provide reference for asphalt pavement structure and reduce the semi-rigid base cracking in permafrost areas. 3 tabs, 8 figs, 13 refs.

References:

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Last Update: 2012-12-30