地下结构无缝施工的试验研究及工程实践

Engineering research and practice on jointless construction of underground structure

本文通过对普通混凝土及膨胀混凝土的胀缩分析及裂缝计算,提出“膨胀加强带”新概念,用以代替地下结构施工的“后浇带”,实现地下结构无缝施工,并通过试验研究。揭示了膨胀混凝土强度与膨胀率之间的内在规律。通过施工工艺设计及工程实践,取得了预期效果。

Through ways of analyzing the ordinary and expanded concrete and their crack-calculations, it has, in this article, introduced the idea of expanded belt, so that the post-casting joint is eliminated and eventually a jointless underground construction is achieved. Further-more, by ways of engineering test and research, it has depicted the internal law of expanded concretes'strength and its expansibility. In conclusion, by ways and means of technological designs and engineering practices, it has reached the previously expected good result.