30m超高加筋土挡墙在宁化行洛坑钨矿的应用

Application of 30 m Ultra High Reinforced Earth Retaining Wall in Ninghua Xingluokeng Tungsten Mine

论述了超高加筋土挡墙的设计过程与建造及挡墙的变形特征。较大墙高宜采用加筋土挡墙,其对地基的适应性强,占地少,建造周期短。行洛坑钨矿原矿运输铁路跨越深沟谷,与栈桥相比较后,采用了加筋土挡墙方案,设计建造了二级30 m超高加筋土挡墙作为路基,1 a累计最大水平位移16～83 mm,最大沉降24～115 mm,建成5 a来运行正常。

The engineering process and deformation features of the construction and the retaining wall are described. Reinforced earth retaining walls are applicable to big and high walls as they are featured by strong adaptation to foundations ,less land occupation and short construction period. The run-of-mine transport railway of Xingluokeng Tungsten Mine runs across deep valleys ,for which reinforced earth retaining wall approach is selected after comparison with trestle option. In the design, class-II 30 m ultra high reinforced earth retaining wall is built as the road bed, which gives an annual accumulated maximum horizontal displacement of 16 - 83 mm and maximum sedimentation of 24 -115 mm. The wall has been working well since its operation for 5 a.