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Column scheme of BET surface area for solvent-extracted samples before and after hydrothermal treatment in boiling water.
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| | Based on experience in North-east China and Zhenzhou city with reverse construction technology, the roblems on constructionof column, sidewall and treatment of ground water were studied. Thelower connected column ethod in place where boring pile is unsuitablewas described. Its advantages under some conditions were presented. | | 本文在叙述了“逆作法”对主体工程的施工程序及其优越性之后,根据我国东北地区及郑州等地的经验,对送作法的柱子、边墙施工及有地下水时的处理等问题进行了探讨。特别是对不能在地面上做钻孔桩时采用“下接柱方案”叙述较详。在一定条件下这个方案有明显的优点可供有关方面参考。 | | 文摘来源 | | The Three Gorges Powerhouse will be arranged at the dam toe, with a total capacity of 700 MW × 26 mixed flow turbines. The review emphases were put on the strength and the stiffness of the upper structure of the powerhouse at the detailed design phase. The experts expressed many opinions and recommendations. The structural patterns included mainly the beam and column scheme, the solid wall scheme and the wall and column scheme. By analysis on the displacement and stress, the experts believed the solid wall ... | | 三峡水电站厂房为坝后式,共安装26台容量700MW的汉流式机组。厂房上部结构的强度与刚度是厂房技术设计审查的重要内容,厂房专家组对此提出了许多意见和建议。厂房上部结构形式可归纳为梁柱方案、实体墙方案和墙柱方案。经三方案位移与应力分析,专家组认为实体墙方案对抗震有利,工程投资增加亦有限,施工简单,倾向采用此方案。厂房水下结构,应尽可能增加结构刚度。屋盖采用网架结构。 | | 文摘来源 | | According to the condition of the tenth coal seam and the character of surrounding rock of Haizi mine, the width of coal pillar may be reduced when excavating entry along gob side. At the same time the rockbolting technique is improved and the technique succeed in excavating entry along gob side is used. As a result, the extent of rockbolting in roadway is expanded, more coal are mined, the cost of maintaining entry is reduced and good effect is got. | | 结合海孜矿 1 0煤层赋存状况围岩特性 ,研究并提出了沿空送巷留设窄小煤柱方案 ,同时对沿空送巷支护工艺进行改革 ,成功地实施了煤巷锚杆支护 ,提高了矿井资源回收率 ,满足了安全需要 ,取得了较好的效果。 | | 文摘来源 | |   | | << 更多相关文摘 |
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