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21.
深基坑施工对周围环境影响的分析 总被引:2,自引:0,他引:2
杨平 《山东建筑工程学院学报》1995,10(3):37-41
提出了深基坑施工中的支护结构变位,基底隆起的降水引起地表沉降的计算方法,给出了保护周围环境,减小地表沉降的具体措施。 相似文献
22.
《印刷工业》2014,(6):95-95
Operation of printing machine industry was still unsatisfactory in the first quarter of 2014.Analysis on operation of printing machine industry.a.Market demand was not strong;sales of product undulated and declined.According to the statistics,the total industrial output value fell by 19.28% in the first quarter of 2014 than the average quarter value in 2013; industrial added value decreased by 4.16%; sales revenue dropped by 22.83%. h. Business operation of enterprises was in poor condition. c. R&D of new products is an important transformation guarantee for enterprises. d. To take self explore new ways upgrading advantages,and explore new ways. 相似文献
23.
为解决松原审防汛通信难问题,依据实际情况,进行了松原市防汛通信网工程设计,实践证明该项目设计经济、合理,网络运行可靠,并且带来了巨大的社会效益和经济效益。 相似文献
24.
把岩体看作均质、各向同性连续透水弹性介质,引用Harr(1962)提出的镜像理论,结合Zienkiewicz(1958)和Femandez(1994)所作的假定,推导了倾斜地表下水工压力隧洞内水外渗产生的有效应力:假定初始应力场为自重应力场,结合现有的部分成果,详细分析倾斜地表下水工压力隧洞初次充水和正常运行期围岩中的应力场分布。倾斜地表下水工压力隧洞在满足挪威准则的前提下,围岩最小主应力在一定范围内为拉应力,拉应力区呈蝶形分布,且其范围随地表倾斜角的增加而扩大:倾斜地表下压力隧洞最易出现水力劈裂现象的不利位置是围岩拉应力蝶形区伸展最大的方位:隧洞埋深增加1/8最小覆盖层厚度可有效地减小围岩中拉应力区的范围:陡倾地表下压力隧洞设计应慎用水工隧洞设计规范的边坡高限角。 相似文献
25.
Bai Wenping 《中国稀土信息(英文版)》2014,(12)
<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH 相似文献