雏鸡饲养经验十条

1．在出壳后先饮口服补液盐 口服补液盐，其成分为：氯化钠3．5g、碳酸氢纳2．5g、氯化钾1．5g及葡萄糖25g，同时加冷开水1000ml配成。先饮口服补液盐可补充雏鸡出壳时体内所耗去的水分，防止脱水。初次饮水，最好在水中加入万分之一的高锰酸钾，可起到对肠道的消毒作用。     

深厚覆盖层上混凝土防渗墙服役性能分析

【目的】研究混凝土面板砂砾石坝防渗墙的应力变形及实际防渗效果,为高寒地区深厚覆盖层类似工程的设计与施工提供依据。【方法】以青海省纳子峡混凝土面板砂砾石坝为研究对象,在防渗墙施工及运行初期(2012-05-2018-01)对其进行应力监测、变形监测、渗流监测,对所得监测数据进行统计分析,进而评价防渗墙的实际工作状态。【结果】纳子峡混凝土面板砂砾石坝防渗墙各测点应力及变形表现稳定,在施工期防渗墙钢筋的应力变化因受地面施工等因素影响主要承受拉应力,且向上游侧倾斜;在水库运行期间(2014-09-2018-01),墙体受到来自上游的水压力,主要承受压应力,且向下游侧倾斜;布置在墙体上游侧的渗压计渗透压力远大于下游侧各测点,表明防渗墙防渗效果良好,渗透压力受测孔孔内水位影响,且随库水位表现出一定的周期性变化规律,库水位每抬升(或下降)1 m,墙体下游侧各测点渗透压力增加(或减小)约0.6 kPa。【结论】纳子峡大坝混凝土防渗墙在其施工及运行初期应力变形较为稳定,防渗效果良好,能为大坝的安全提供保障。     

胡杨

在西北苍莽的大漠上,有一种盘根错节的三叶树叫胡杨树,人们称之为＂不死树＂. 胡杨树生长在西部戈擘滩、荒原上、沙漠里,一株株虬枝繁衍着.一年四季,任狂风肆虐千丈砂砾,任暴雨怒倾激洪峰壑,任积雪残压地轴四野,任寒霜冰袭万里山河,而胡杨树以极顽强的生命力默默地承载着世间的一切.     

钻孔灌注桩施工事故预防及处理的几点体会

文章介绍了在砂砾土质钻孔塌孔的预防及处理方法，还介绍了首罐砼灌注及断桩处理方法。     

初探水泥稳定砂砾的碾压机理施工方法

为保证稳定砂砾的密实度,采用以初压、振压和终压三个阶段碾压水泥稳定砂砾是合理的、必 要的,也是科学的。     

桑

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仙人掌王国中的贵族——花笼

仙人掌科皱棱球属的花笼（Aztekium ritteri）是魅力无穷的著名珍稀花卉，也是墨西哥仙人掌王国中具有代表性的植物。它仅产自墨西哥干旱的砂砾地带——东北部的新莱昂州（Nuevo Leon），生长在易碎的石灰石构成的陡峭山崖上。     

砂砾土凡土工膜垂直心墙防渗体的施工

以内蒙古多伦县大河口水电站水库砂砾土坝坝体应用厚度0．4mm单层光滑型聚乙烯膜，两侧各置30cm厚天然粉质砂保护层的结构的土工膜垂直心墙防渗体的工程实践为背景，阐述了工程前期试验研究，工程设计，工程施工可操作性三者的依赖关系，介绍了土工膜心墙防渗体埋置施工技术及施工管理和质量控制等方面的经验与体会。     

水泥稳定砂砾基层组成设计及施工

本文叙述了水泥稳定砂砾基层设计及施工的方法。步骤和要点。     

南京周边地区古砂砾层土壤和岩石形成的数学分析

Research samples were taken from an ancient gravel stratum which is not only a representative soil layer along the middle-lower reaches of the Yangtze River in East China ,but also one of the primary Neozoic strata in Nanjing district.Located mostly on the second and third terraces,the ancient gravel strata formed the geomorphic landscapes of terrace and step.They were complex in constitution,varied widely in stability,of multiple sources,locally derived ,and associated with braided streams in the deposition environment ,A CIPW(Cross,Iddings,Pirsson and Washington) method modified by the author was used to analyze the soil-rock-forming materials of finer grains(less than 2 mm in size) of the ancient gravel stratum.Results of the analysis showed that the sandy grains were composed of apatite,ilmenite,potassium feldspar,plagioclase,enstatite and free quartz,the clay mainly of kaolinite,and the cement of a combination of silicon,aluminum and iron at a ratiof of 46:44:10.In the soil-rock-forming processes, including compactional solidifiation,water-stable illuviation-cementation,homogneous overgrowth and so on,the loose soil-rock-forming components gradually changed into consolidated soil and further to the early stage of lithification.Meanvwhile,from ,the analysis,we found that the ancient gravel stratum had been protected by overlying Xiashu loess or basalt and the overloading resulted in overconsolidated strata ,The modified CIPW method was applicale and effective for semi-quantitative analysis.