The Technology and Application of the Tree Planting Baseplate in Bare Rock Area

The ecological greening technology of the bare rock area of the arbor governance be-longs to the field of ecological environment restoration, selection of suitable arbors for vegetation restoration in bare rock area, vegetation recovery is the primary approach to governance the ecological environment of bare rock area. The reconstruction of bare rock area arbor-shrub-grass ecosystems is a global environmental science problem. Paying attention to Geological conditions with rich rock fissures and abundant groundwater in these fissures, following the idea to reconstruct ecosystem from arbor to shrub and grass and the principle one tree in a baseplate, authors develop a baseplate technique for tree planting in bare rock area. The baseplate includes the parent body, the root, and the cover to prevent evaporation. Especially, there are filled in nutritional soil for the parent body and the root, and the composition of nutritional soil are selected by test in laboratory, while optimal mix ratio of the composition is obtained. Then, application method in field is put forward. The technique can guarantee survival at early stage and growth in the later for tree planting in the baseplate. In particular, the root provides a good channel to guide tree roots into fissure rock and absorb groundwater in rock. Test in field shows that the baseplate technique has strong practicality in vegetation recovery of bare rock area. Test in field shows that the baseplate technique has strong practicality in vegetation recovery of bare rock area in the world.

土壤固化剂在铁路施工道路路基处理中的应用

对道路路基掺入土壤固化剂后固化土混合料的无侧限抗压强度、水稳系数和凝结时间影响系数进行试验研究,并对试验段路基进行回弹弯沉试验和浸水膨胀量检测。试验结果表明:固化土底基层混合料的无侧限抗压强度提高24. 4%,水稳系数提高11. 8%,凝结时间影响系数提高8. 2%;土壤固化剂掺量的提高可进一步增大固化土混合料的无侧限抗压强度,且固化土基层混合料的水稳系数和凝结时间影响系数增长规律与固化土底基层混合料基本一致;道路1 d弯沉值为67. 04×10^(-2)mm,浸水膨胀量为0. 019%,说明土壤固化剂有较好的早强作用,且提高了固化土混合料的抗水浸能力。较高的无侧限抗压强度和良好的水稳定性能保证了临时道路的承载能力。