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值得注意的是(shi)，管(guan)(guan)(guan)(guan)道(dao)內(nei)的充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)不能與介質(zhi)重(zhong)(zhong)(zhong)同(tong)時(shi)(shi)考慮，并(bing)(bing)且只有當(dang)管(guan)(guan)(guan)(guan)子需(xu)要(yao)進行(xing)水(shui)(shui)壓試驗(yan)時(shi)(shi)才考慮充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)的影響。一般情況(kuang)下，對于大(da)(da)直徑管(guan)(guan)(guan)(guan)道(dao)，尤(you)其(qi)是(shi)大(da)(da)直徑氣(qi)體管(guan)(guan)(guan)(guan)道(dao)，其(qi)充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)要(yao)比介質(zhi)重(zhong)(zhong)(zhong)大(da)(da)許多(duo)，故這類(lei)管(guan)(guan)(guan)(guan)道(dao)的支吊(diao)架應考慮能承受(shou)水(shui)(shui)壓試驗(yan)時(shi)(shi)的充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)。對于并(bing)(bing)行(xing)的多(duo)根(gen)(gen)管(guan)(guan)(guan)(guan)道(dao)，如管(guan)(guan)(guan)(guan)廊上的管(guan)(guan)(guan)(guan)道(dao)，每根(gen)(gen)管(guan)(guan)(guan)(guan)道(dao)不能同(tong)時(shi)(shi)計入充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)，實際(ji)的水(shui)(shui)壓試驗(yan)過程也是(shi)逐根(gen)(gen)進行(xing)的，此時(shi)(shi)在向結構專業提出荷載條件時(shi)(shi)，以其(qi)中的最(zui)大(da)(da)一根(gen)(gen)管(guan)(guan)(guan)(guan)道(dao)充(chong)(chong)水(shui)(shui)重(zhong)(zhong)(zhong)計算即可。

冷態下(xia)，管(guan)道的(de)基本載荷是按(an)管(guan)系的(de)空間幾何(he)形狀(zhuang)(zhuang)進行分配(pei)的(de)，即通過管(guan)系的(de)空間幾何(he)形狀(zhuang)(zhuang)和支承點的(de)位置(zhi)可以計算(suan)出各承重點的(de)分配(pei)載荷。

3. 帶(dai)有閥(fa)門等集(ji)中載荷的水平(ping)管(guan)道(dao)基本(ben)載荷（圖9-53）

圖9-53給出了裝有兩個閥門(men)的(de)(de)水(shui)平管(guan)道，閥門(men)重(zhong)量分別(bie)為(wei)F1和F2。管(guan)道中共有A、B、C三個支(zhi)(zhi)撐點，各支(zhi)(zhi)承點的(de)(de)位置尺寸(cun)及(ji)閥門(men)的(de)(de)位置尺寸(cun)分別(bie)為(wei)L1、L2、a、b、c、d。那么各支(zhi)(zhi)承點所承受的(de)(de)基本載荷可分別(bie)按下式計算：

4. 帶有垂直段管道(dao)的集中載荷（圖(tu)9-54）

圖9-54給(gei)出(chu)了有豎(shu)直管(guan)段的管(guan)道情(qing)況，此時對兩(liang)個支承點A、B來(lai)說，可將豎(shu)直段管(guan)道看作一集中(zhong)載(zai)荷(he)，該集中(zhong)載(zai)荷(he)，那么可以(yi)得到兩(liang)支承點的載(zai)荷(he)分(fen)別為：