The Use of Geocomposite Drainage Layers to Mitigate Frost Heave in Soils
The Use of Geocomposite Drainage Layers to Mitigate Frost Heave in Soils
复制标题
使用土工复合排水层减轻土壤冻胀
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Reese
中科院分区：
文献类型：
--
作者：
M. Evans;K. Henry;S. Hayden;M. Reese
道路路面下方细粒土壤的冻胀会造成广泛且代价高昂的损害。为了减轻冻胀和相关损害，在缅因州法兰克福和温特波特美国 1A 号公路沿线 3.0 公里重建路段的公路测试路段安装了土工复合材料排水网，作为减少冻胀的毛细管屏障和加速解冻恢复的排水层。该路段此前一直饱受路面开裂、车辙和坑洼的困扰，需要频繁且昂贵的维护才能维持可通行的路面。热电偶串以六英寸（152 毫米）垂直间隔嵌入测试部分，并记录部分内的温度和深度。还记录了环境空气温度和道路海拔。本文仅讨论土工复合材料对冻胀的影响。报告了施工后 1997 年至 1998 年冬季的结冰指数、霜冻渗透率和隆起度。结果表明，将土工复合材料放置在路基内会带来一些好处。土工复合材料的主要好处似乎是它在春季解冻期间提供脱水效益，可能控制地下水位的高度。挖/填深度也可能会掩盖土工复合材料排水层的有效性。
Frost heave in fine-grained soils below roadway pavements causes extensive and costly damage. In order to mitigate frost heave and associated damage, a geocomposite drainage net was installed in highway test sections along a 3.0 km reconstructed portion of US Route 1A in Frankfort and Winterport, Maine, to function as a capillary barrier to reduce frost heave and a drainage layer to accelerate thaw recovery. This section of road had previously been plagued by pavement cracking, rutting, and potholes requiring frequent and costly maintenance to maintain a trafficable pavement surface. Thermocouple strings were embedded in the test sections at six-inch (152-mm) vertical intervals and temperatures were recorded with depth within the section. Ambient air temperatures and roadway elevations were also documented. This paper deals only with the influence of the geocomposite on frost heave. The freezing index, frost penetration and heave for the winter of 1997–1998, immediately after construction are reported. The results suggest some benefit when the geocomposite is placed within the subgrade. It appears that the primary benefit of the geocomposite is that it provides dewatering benefit during spring thaw—probably controlling the elevation of the water table. There may also be an effect of the cut/fill depths that masked the effectiveness of the geocomposite drainage layers.