青藏铁路西格二线新型防风固沙体系的设计研究

对青藏铁路西格二线在日照冻融变化强烈、风力强劲的高原砾质荒漠环境下,以PE防风固沙网为平面防护,结合HDPE高立式防风栅栏的立体防护,构成新型综合防风固沙体系,具有抗风蚀性能强及环保等特点;现场观测及风洞试验结果证明:其防风固沙效果良好,工程可靠,可完全替代传统草方格等措施,并能显著减少养护工作量。对类似生态脆弱、沙害严重的地区,具有借鉴和示范作用。

Design Research of New Sand-fixing System for the Second Line in Tibet-Golmud Section of Qinghai-Tibet Railway

For the second line of Tibet-Golmud Section of Qinghai-Tibet Railway is located in plateau gravel desert with rapid sunshine variation and strong wind,the new comprehensive sand-fixing system is formed by plane protection with PE sand-fixing net and three-dimensional protection with HDPE high vertical wind fence,which has the characteristics of strong weathering resistance and environmental protection.The result from site observation and wind tunnel test shows that this new system has good effect for sand fixation,reliable for engineering,which can completely substitute for traditional grass grid measures and significantly reduce maintenance work.It provides reference and demonstration for the similar areas with fragile ecology and severe sand damage.