贴近性是吸引读者一大法宝

本文旨在用生动的实例,探讨什么是新闻报道的贴近性,新闻报道的贴近性都有哪些特点,存在的形式和种类。作者以长期的新闻实践为基础,结合当前实际,深入探讨了增强新闻报道贴近性应选择的途径,应采取的方法。论述了强化新闻报道的贴近性,对提升报纸吸引力、感染力,进而扩大报纸知名度、影响力的重要作用。从西安地区报纸竞争的态势出发,阐明了强化新闻报道的贴近性,对提高报纸竞争力的重要意义。

芜湖长江三桥2号桥塔下横梁支架设计与施工

芜湖长江三桥主桥为(99.3+238+588+224+85.3)m双塔双索面高低塔钢箱钢桁结合梁斜拉桥,2号桥塔下横梁采用落地支架法施工。下横梁支架由底模、承重梁、分配梁、牛腿和立柱等组成。立柱采用2排4列Φ1000 mm×12 mm钢管立柱,承重梁采用异形变截面工字梁以适应下横梁圆弧段线形,支承于立柱顶分配梁上。通过分层浇筑下横梁混凝土并张拉部分预应力有效减小了支架受力;计算支架变形并结合预压实测数据设置预拱度,有效控制下横梁线形;采用合理温控措施有效减小了因下横梁混凝土水化热产生的裂缝。

挺身式跳远完整技术辅助教学法

一、原地单腿上跳，直体落地法：方法：预备姿势，起跳腿站立支撑，另一腿(摆动腿)屈膝上抬。要领：用起跳腿连续上下跳动五次。当第五次跳起后立即下放摆动腿，并展髋，两腿并拢，成直体以双足尖落地(如图1)。

独塔双索面斜拉桥主塔下横梁施工及支架力学性能研究

落地支架法在斜拉桥主塔横梁施工中发挥着重要作用,为了研究落地支架在独塔双索面斜拉桥主塔下横梁施工的力学性能,以引江济淮工程周瑜大道桥为背景,对斜拉桥主塔下横梁施工方案进行了研究,并对下横梁支架中贝雷梁、钢管柱、分配梁、横梁的强度、刚度及钢管柱稳定性进行了分析。结果表明,支架各构件的强度、刚度及稳定性均满足构造要求。研究结果为后续斜拉桥主塔横梁施工提供借鉴。

Numerical simulation of land subsidence and verification of its character for an iron mine using sublevel caving

Combined with a digital bored photography system and in-situ statistics concerning the joints and fissures of both ore-body and surrounding rock,a 2D discrete model was constructed using UDEC.The stress field and displacement field changes of different sublevel stoping systems were also studied.Changes in the overlying rock strata settlement pattern has been analyzed and validated by in-situ monitoring data.The results show that:in the caving process,there exists an obvious delay and jump for the overlying rock strata displacement over time,and a stable arch can be formed in the process of caving,which leads to hidden goafs.Disturbed by the mining activity,a stress increase occurred in both the hanging wall and the foot wall,demonstrating a hump-shaped distribution pattern.From the comparison between simulation results and in-situ monitoring results,land subsidence shows a slow-development,suddenfailure,slow-development cycle pattern,which leads eventually to a stable state.This pattern validates the existence of balanced arch and hidden goafs.

常泰长江大桥主航道桥6#主塔下横梁支架设计与施工

常泰长江大桥主航道桥为(142+490+1176+490+142)m公铁两用斜拉桥。6#主塔下横梁采用落地支架法施工。下横梁支架由底模系统、承重梁、分配梁、牛腿、钢管立柱、附墙等组成。采用在纵、横梁跨中处预留2m宽的后浇段,且下横梁高度方向不分层,平面分区域与塔柱同步浇筑的总体施工方案,有效控制了横梁与主塔交界处易产生开裂的风险;通过对边、中跨两侧纵向支架的底模抄垫采取非对称布置措施,并结合监控预警系统,有效解决纵梁分段施工时线形控制难题;利用锁定措施,确保合龙口对顶施工的持荷效果,保障后浇段顺利施工。