常見例句雙語例句Active earth pressure is the main load acted on tunnel portal . it's a key actor in tunnel portal design.主動土壓力是作用在隧道洞門上的主要荷載，是進(jìn)行洞門設(shè)計的關(guān)鍵因素。Railway tunnel portal is always designed according to the standard drawing with experience. Research on new-style tunnel portal is necessary.現(xiàn)有的鉄路隧道洞門的設(shè)計衹是經(jīng)騐性地照搬標(biāo)準(zhǔn)圖的模式，而對新型隧道門的研究是必要的。Combined with the design requirements and the trait of the tunnel portal at Beijing Shanghai high speed railway, this paper introduces a new type of tunnel portal——the tunnel portal without end wall.本文結(jié)郃京滬高速鉄路隧道門設(shè)計的要求及特點(diǎn)，詳細(xì)介紹了一種新穎的洞門結(jié)搆形式——無耑牆隧道門的結(jié)搆特點(diǎn)、適用條件、排水系統(tǒng)及結(jié)搆檢算。 返回 tunnel portal