Experimental investigation and long-term monitoring of geocell-reinforced roads under freeze-thaw cycles

冻融是造成加拿大道路不景气的主要原因。这项研究项目旨在研究使用Neoloy地电池来降低道路冻融破坏的风险，并增强寒冷地区道路的弹性。将建造一段完全装有仪器的道路，以监测土工格栅加筋道路在季节性冻融循环下的长期性能。同时，对土工格室加筋土进行了一系列冻融循环下的室内模型试验，采用受控的温度和机械荷载条件和不同的土性条件。该项目的成果包括：(1)量化土工格室加固道路抵抗冻融破坏的有益效果；(2)了解土工格室加固道路的基本机理；(3)开发土工格室加筋道路在冻融循环下的设计方法。这项研究的结果将有助于改进加拿大耐用道路的设计和施工实践。

Freeze-thaw is a major cause for distress of roads in Canada. This research project is to investigate the use of Neoloy geocells to reduce the risk of freeze-thaw disruption to roads and enhance resilience of roads in cold regions. A fully instrumented road stretch will be constructed to monitor the long-term performance of the geocell-reinforced roads subjected to seasonal freeze-thaw cycles. Meanwhile, a series of laboratory-scale model tests on geocell reinforced soils under freeze-thaw cycles will be conducted by employing controlled thermal and mechanical loading conditions and varying soil conditions. The outcomes of this project include (1) quantifying the beneficial effect of geocells in reinforcing roads against freeze-thaw damage, (2) understanding the underlying reinforcing mechanisms, and (3) development of a design method for geocell-reinforced roads under freeze-thaw cycles. The results of this research will contribute to improvement of the design and construction practices of durable roadways in Canada.