关于引黄南干1￣#洞混凝土裂缝的分析

Analysis on Concrete Crack of No.1 Tunnel in the South Main Line of the YRDP

山西省万家寨引黄工程南干１＃隧洞在贯通后仅１４ｄ就出现了裂缝。这对于绝大多数处于地下的引黄工程来说虽然是个特例，但随着今后地面工程的依次展开，混凝土早期表面保护问题应当引起重视。本文以实测资料为依据，对导致温度裂缝发生的各个方面原因作了分析。为此，期待围绕这一问题的种种歧见得以廓清。

The concrete crack,in No.1 tunnel of the South Main Line of the YRDP,occurred on only 14th day after breakthrough.In this paper,based on the data obtained by in situ measurement,the cause of the concrete crack is analysed.Finally,some suggestion for avoiding cracking are given.The break through time:October 27,1997.