水利水電工程鉆孔注水試驗(yàn)規(guī)程(SL345-2007)

水利水電工程注水試驗(yàn)規(guī)程2005（送審稿）

目次1總則·······················································································……32術(shù)語(yǔ)、符號(hào)··············································································……42.1術(shù)語(yǔ)····················································································……42.2符號(hào)····················································································……43試坑單環(huán)注水試驗(yàn)·····································································……53.1適用條件及試驗(yàn)設(shè)備···········

關(guān)于2008注水的《經(jīng)濟(jì)管徑》

原來(lái)的圖有點(diǎn)小錯(cuò),，更正后在以下。不過(guò)也是個(gè)草稿,。暫且沒時(shí)間擺活,。。,。新附件在這兒： 關(guān)于經(jīng)濟(jì)DN Q群之《給排水茶館》,，供討論，2009年9月14日一,、【前提】 1、半定量分析,，沒時(shí)間全定量來(lái)分析,。2、考慮哪個(gè)影響因素時(shí),，相對(duì)來(lái)說(shuō)其他另外因素是不變的,。如同分析多元函數(shù)一樣。二、2008注冊(cè)給排水的一個(gè)題目如下：42. 在選擇管道經(jīng)濟(jì)管徑時(shí),，以下說(shuō)法哪些是錯(cuò)誤的,？（A）電費(fèi)越貴，經(jīng)濟(jì)管徑越?。˙）管道造價(jià)越貴,，經(jīng)濟(jì)管徑越小（C）投資償還期越長(zhǎng),，經(jīng)濟(jì)管徑越?。―）管道大修費(fèi)率越高，經(jīng)濟(jì)管徑越小三,、【結(jié)論】1,、題目有嚴(yán)重歧義。2,、不僅有歧義,，而且本身此知識(shí)點(diǎn)的理解有重大偏差。3,、如果按正常的字面理解,，此題目當(dāng)選擇AC，就是AC是錯(cuò)的,，BD是對(duì)的,。四、【分析】 1,、以《給水工程》第四版P38那個(gè)圖5-9分析：