drainage trench

基本解釋

Preventive measures are presented aiming at strengthening the subgrade and pavement drainage and the trench treatment.
從加強(qiáng)路基和路面排水及路槽處理等方面著手，提出防治的對策。
The drainage system consists of four water composition: street drainage→drainage veins→trench→sea (river), to ensure the city against the tide, flood hazards.
這個(gè)水系統(tǒng)由四級水體組成：街渠→六脈渠→濠→海（江），保證了城市免受海潮和洪水的危害。
Therefore the general construction process scheme is worked out as follows:open trench drainage, work site dried in the sun, conventional butt welding, and pipe laid down into trench.
經(jīng)過調(diào)研和反復(fù)現(xiàn)場勘察，確定的總體施工方案為：挖明溝排水，作業(yè)帶晾曬，正常組對焊接，沉管下溝。