高原高速公路生态保温型水泥稳定碎石层养生技术研究

Study on health preservation technology of ecological insulation cement stabilized gravel layer for Plateau Expressway

摘要:

高原地区环境脆弱，在这里区域建设高速公路的要求很高，其中水稳基层的养生过程对环境的影响较大，为遴选出更为生态环保的养生技术方案，又要满足性能要求，研究进行了三种养护方式的室内试验和道路施工验证，包括可降解的保湿膜、滴灌节水的保湿养护以及PE薄膜密封养护。结果显示：使用土工布进行养护需要水量大，而且保温性能及对水泥稳定碎石的收缩性抵抗能力最差。PE薄膜密封养护次之，而可降解保湿膜的效果最优。

Abstract:

The environment in the plateau area is fragile, and the requirements for constructing highways in this area are high. The health preservation process of the water stabilized base has a significant impact on the environment. In order to select a more ecological and environmentally friendly health preservation technology solution while meeting performance requirements, the laboratory experiments and road construction verification of three maintenance methods are studied including the degradable moisturizing film, drip irrigation water-saving moisturizing maintenance and PE film sealing maintenance. The results show that the use of geotextile for maintenance requires a lot of water, and its insulation performance and resistance to shrinkage of cement stabilized crushed stone are the worst. PE film sealing maintenance takes second place, while the degradable moisturizing film has the best effect.