【摘 要】
:
The influence of engineering factors on the geocryological environment has the char acteristic of thermal zone. The predominantly continuous permafrost area can
【机 构】
:
Key Laboratory for Special Area Highway Engineering of Ministry of Education,Chang'an University,Xi
论文部分内容阅读
The influence of engineering factors on the geocryological environment has the char acteristic of thermal zone. The predominantly continuous permafrost area can be divided into the low temperature permafrost and the high temperature permafrost zone. In the low tempera ture permafrost zone, the subgrade is stable without taliks under it; while in the high tempera ture permafrost zone, the subgrade is unstable with taliks and plenty of groundwater under it. When geocryological environment changes, the influence of raising temperature of frozen ground with various ice content on the stability of subgrade is different. So the mean annual tempera ture and the ice content are adopted as the key indexes in the highway environment zoning sys tem. In accordance with the characteristics in different permafrost zones the suitable subgrade design principle is chosen, the rational subgrade structure and the suitable countermeasures are decided, making the structures integrate with the environment.
其他文献
本文针对平原微丘区和山区高速公路的不同特点,从总体设计的指导思想、设计原则、总体设计要点等方面对不同地形高速公路的总体设计进行了的比较。通过比较,明确了不同地形高速
学校管理规章制度是学校的教育思想、工作作风和管理水平的具体体现,影响到其制定的因素是多方面的,制定合理的学校管理规章制度需要遵守依法、保障师生员工合法权利、公正公
对既有桥梁结构性能进行评估以静载试验法最为常用,动力法评定技术与之相比具有简便、快速等优点,但是直接将动力参数用于桥梁承载力定量评定还不成熟,国内也没有形成动力法评定
入行后孙耀琦拍的古装戏远多于时装剧,她直言偏爱古装戏是因为在她眼里,古装戏很能锻炼人。孙耀琦曾参演《好汉一箩筐》《一家老小向前冲》《爱情魔方》等多部影视剧,可开启
电信器材是通信的主要手段,电信器材大体上可分为有线、无线两类,其元器件主要是电子产品。电信器材在生产工序中,潜在的火灾危险性较大。由于大部分电信器材都很精密,产品、
一、程至的的艺术生平程至的(1922—2004),笔名白勺,浙江温州人。他一生从事版画创作与艺术研究,是一位成就卓著的版画家和美术理论家。程至的早年的艺术履历经历了从中国画
目的:评价间变性星形细胞瘤术后调强放疗同期联合替莫唑胺(TMZ)化疗的疗效及毒副作用。方法:57例间变性星形细胞瘤术后患者随机分成调强放疗同期TMZ化疗组和单纯调强放疗组,
1对日本原爆幸存者的研究 ABCC-RERF对广岛和长崎的原爆幸存者已跟踪调查了50多年。其研究结果是目前放射防护领域的主要科学基础,很容易在国际性杂志上获得。因此,这里主要介绍原爆幸存者
From time to time, construction damage occurs through errors in handling, sluny placement, concrete placement, casings, cages, and other factors than can damage
意大利画家弗朗切斯科·克莱门特Francesco Clemente)被誉为当代最出色的新表现主义画家之一,他从文艺复兴起源地意大利走来,经历万物有灵的印度南部,到达最耀眼的现代性景观