组合式容器绿化在咸阳城区老旧楼房屋顶绿化中的应用

Combined Container Greening: Application to Roof Greening of Old Buildings in Xianyang Urban Area

旨在探讨在未设计屋顶花园恒荷载的老旧楼房既有屋顶上进行组合式容器绿化的可行性及其优缺点,笔者利用佛甲草、垂盆草、紫花地丁、韭兰等植物栽种在不同规格、形状的塑料花盆及木质花盆形成的容器种植,组成组合式容器绿化,定量测定其在既有屋面上增加的荷载、降温、降噪、蓄排水量等数据,并据此对其绿化效果进行评估。结果表明,组合式容器绿化增加的荷载低于屋顶临时荷载,其降温、降噪效果明显,蓄积雨水、延迟屋顶径流峰值的能力较强,绿化效果明显。试验结论为在未设计屋顶绿化恒荷载的老旧楼房既有屋面上,可以进行组合式容器绿化,其安全性有保证,同时,建成的屋顶绿化有很好的降温、降噪、缓解城市蓄排水压力等环境效益,值得大面积推广。

The paper aims to explore the feasibility of the combined roof container greening on old buildings which were not designed to provide the load for gardening. Sedum lineare Thunb, Sedum sarmentosum Bunge, Viola philippica, Zephyranthes candida were planted in different planting containers formed from plastic pots and wooden pots of different sizes and shapes to compose the combined container roof greening, and the authors determined the increased roof load, temperature, noise reduction, water storage and drainage values, then evaluated the greening effect. The results showed that： the increased load of the combined roof container greening was lower than the temporary load, and its cooling and noise reduction effects were obvious, the ability to accumulate rainwater and delay runoff peaks was strong, and the greening effect were significant. On the roof of old buildings which were not designed to provide the load for gardening, the combined roof container greening could be used because its safety is guaranteed, meanwhile, building roof greening has good environmental benefits, such as cooling, reducing noise, relieving the urban drainage pressure and so on, and is worth being promoted in large areas.