汉宜铁路蔡家湾汉江特大桥武汉岸引桥跨越既有汉丹铁路施工安全防_建筑科学论文 关键词：铁路桥梁；跨线施工；安全防护 [gap=847]Keywords: railway bridge; Cross line construction; Safety protection
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Taking the cross cave propping in Hanguguan Tunnel of passengers special line on Zhengxi railway, this paper introduces a new construction technique of propping - vertical propping method.
文章以郑西铁路客运专线函谷关隧道横洞挑顶为例，介绍了一种新型挑顶施工工艺——垂直挑顶法。
Mine cross middle line point is widely used in mine construction and production.
矿井十字中线点在建井和生产过程中使用较多。
The technology's application is introduced in canter line lay-out, profile and cross section surveys and construction surveys.
具体介绍了该技术在中线放样、纵横断面测量以及施工测量中的应用。
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