【摘要】 青藏高原冻土由于气候变暖、人类活动加剧等原因冻土线下移,造成冻土区公路病害严重,达不到使用年限,为了提高其耐久性,冻土区公路采用"U型"通风路基,主动保护路基下冻土,达到提高冻土区公路耐久性目的。更多还原

【Abstract】 Due to climate warming,human activities aggravating and other reasons,Qinghai-Tibet Plateau line is moving down.That results in serious damage to roads in congealed ground and those roads would not reach the designed service life.To improve the durability of the line,a ventilated U-roadbed was used the roads in congealed ground region which could automaticly protect the frozen soil under roadbed,by which the purpose of improving road durability in permafrost region was achieved.更多还原