某工程抗浮锚杆桩达不到设计抗拔力的处理方法

武汉地区近年来多采用小孔径抗浮锚杆桩对地下室进行抗浮加固,但通常会有少部分锚杆达不到设计抗拔力。为解决这一问题,利用支护桩的抗拔力来弥补锚杆桩的不足,从而有效地解决了地下室抗浮难题,为类似的工程问题提供了参考。     

露天矿预留三角矿体稳定边坡研究与应用

在对边坡岩体滑坡地质因素分析的基础上，探讨边坡滑动机理和边坡岩体破坏模式。用预留三角矿体以实施边坡稳定，获得了较为理想的技术经济效果．     

Effect of coppicing height on the regeneration and productivity of certain firewood shrubs in alkaline soils of North Indian plains

Four shrubs, viz. Hibiscus tiliaceus, Leucaena leucocephala, Vitex negundo and Sesbania sesban, were evaluated for their performance as firewood crops in coppiced stands of varying cutting heights (15, 30 and 45 cm) in repeated annual harvests (4) on alkaline soils of the North Indian plains. The dry wood yield of Leucaena and Sesbania ranged between 22.9–42.6 and 9.9–18.0 tonnes ha⁻¹ year⁻¹, respectively. Leucaena showed progressive increases in yield from coppiced stumps up to the 4th harvest while Sesbania showed a reduction after the third harvest mainly due to the high degeneration (60%) of coppiced stumps. Degeneration was low (<10%) in Leucaena and Vitex. The coppicing heights generally did not show any significant effect on the growth and productivity. The number of coppice shoots per stump increased with stump height and production of coppice shoots was maximum in Vitex and minimum in Leucaena. The average diameter of coppice shoots tended to decrease with increasing coppicing height of the stumps.