4月27日，贵阳轨道交通3号线农学院站到花溪公园站区间顺利下穿花溪河。
农花区间右线全长1670米，其中下穿花溪河段有41米，最小竖向埋深6.88米，上部水深5米，贯穿裂隙带14米，是典型的上软下硬地层。花溪河作为一级水源保护地，对环保要求极高，作为项目“卡脖子”施工节点，为确保顺利下穿花溪河，项目部精心组织业务骨干，提前做足各种突发情况的准备，首次采用膨润土渣土改良技术，穿越期间隧道无渗漏水，管片采用Pz2加强型管片。施工中，组织了工人两班倒，日夜鏖战，先后克服了岩溶地质、河水倒灌、地下水喷涌等诸多难点，原计划7天完成，现在提前2天下穿完成，做到了零泄漏，零污染，确保了花溪河一级水源的安全。
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