1) mutative and large transect
突变大断面
1.
In underground engineering of city, the constructions of the tunnel will inevitably produce the land subsidence,the building asymmetry decline and other negative influence to the enviroment,this kind of phenomenon is especially outstanding while constructing mutative and large transect multi-tunnel system of urban metro.
在城市地下工程中，隧道的施工都会不可避免地产生地表沉降、建筑物不均匀沉降等对环境的负面影响，这种现象在修建突变大断面地铁群洞隧道时表现得尤为突出。
2) break section
突变断面
3) the section suddenly enlarging
断面突然扩大
4) truncated mutation
截断突变
5) sharply changing section
面积突变
6) gross mutation
[遗]大突变
补充资料：异形断面钢材(见异形断面型材)
异形断面钢材(见异形断面型材)
special section steel
，一、u以uu、’“飞豆on gQngC01异形断面钢材(speeial Seetion steel)见异形断面型材。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条