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湖南楚湘建设工程集团有限公司

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№ CN122919405AInvention
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一种高寒高海拔永久冻土区竖井掘砌施工方法及结构

本发明公开一种高寒高海拔永久冻土区竖井掘砌施工方法及结构，属于竖井工程技术领域。该方法包括施工准备、冻土段凿孔、爆破出渣、超前钢孔桩施工、井壁浇筑、壁后注浆充填加固以及边帮柔性防护。针对冻土段钻爆法施工中冻土融化堵孔、效率低下问题，采用潜孔钻机配合PPR护孔管实现高效成孔；针对混凝土水化热引起的井壁冻土冻融脱空问题，采用短段掘砌并紧跟壁后注浆工艺，确保脱空空腔得到100%充填；针对冻土边帮融化失稳问题，采用无缝钢管、铁丝网及地钉构成的柔性全封闭防护体系。本发明有效解决了高寒高海拔永久冻土区竖井掘砌施工中的成孔难、冻融危害、井壁稳定和边帮安全四大核心难题，适用于类似恶劣气候与地质条件下的竖井工程。

❖湖南楚湘建设工程集团有限公司; 湖南科技大学梁瑞虎; 阙心滔; 龙凤; 肖华强; 李二林; 方双勇; 罗睿; 赵延林Oct 16, 2026§ 2/9 ClaimsE21D 1/00 (2006.01), F42D 1/00 (2006.01), E21D 1/08 (2006.01)52