青海省国道338线热江段改建工程在不到两年的时间内，将一条破损的砂砾路升级为生态友好型绿色公路1。该项目全长102公里，位于海北藏族自治州刚察县祁连山南麓1，由中交一公局集团、青海路桥、海南天和、青海省公路局等单位共同完成1。工程采用钢渣沥青混凝土、生态钢筋石笼等新材料新工艺，共修复了300多处历史遗留坑槽，其中最大的深坑规模为长800米、宽40米、深6米左右1。
建设过程中充分实现了资源循环利用和生态保护的统一1。项目共挖方43万余立方米，其中弃土34万多立方米得到二次利用，填方仅需8.5万立方米1。老路利用率达到99.5%，原生植被得到复绿1。在用地管理上，临时用地获批600亩，但实际使用不到120亩，节约率超过80%1。为保护高原野生动物栖息环境，建设单位义务修建了60多条牧道，设置了十余组人工鹰巢，建立了6处候鸟栖息地1。
A 102-kilometer stretch of China National Highway 338 in Qinghai Province has been successfully reconstructed into an environmentally sustainable corridor in less than two years, replacing a deteriorating gravel surface with advanced green infrastructure 1. The Hot River to Jiang segment project, completed by China Communications Construction Company First Public Bureau Group, Qinghai Road and Bridge, and Hainan Tianhe under oversight of the Qinghai Provincial Highway Bureau, addressed over 300 historical road depressions while minimizing ecological disruption 1.
The reconstruction employed innovative materials and techniques tailored to the alpine plateau environment 1. Engineers utilized steel slag asphalt concrete and ecological reinforced gabions to restore the damaged roadway, while achieving a 99.5 percent reuse rate of the original pavement 1. Of the 430,000 cubic meters of excavated material, 345,000 cubic meters were repurposed through secondary utilization, with 85,000 cubic meters of fill required 1. The project's commitment to land conservation was equally notable: though 600 acres of temporary land use was approved, actual site usage remained below 120 acres, representing a reduction exceeding 80 percent 1. The most significant historical depression spanned 800 meters in length, 40 meters in width, and approximately 6 meters in depth 1.
Beyond pavement restoration, the initiative incorporated wildlife habitat protection measures alongside restoration of native vegetation 1. The construction teams built over 60 pastoral access routes and installed more than a dozen artificial eagle nests to support high-altitude species 1. Six designated bird roosting sites were also established as part of the comprehensive ecological remediation strategy 1.
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