三联隧道二号通风竖井钢护筒施工技术及检算

Construction technology and checking of steel casing construction at triple tunnel No.2 ventilating shaft

针对六沾铁路三联隧道通风竖井极易发生变形坍孔的情况,经过工期和效益的分析,提出采用壁厚δ=10 mm的钢护筒进行全孔防护。介绍了该钢护筒防护的施工技术,并对相关数据进行了验算,从而保证了钢护筒防护的顺利按期完工。

According to the situation prone to deformation hole collapse at Liuzhan railway triple tunnel of ventilation shaft, after the time limit for a project and benefit analysis, put forward used steel easing with the wall thickness δ = 10 mm to full hole protection. Introduced the constmction technology of steel casing protection, and checked the related data, thus ensured the successfully completed on schedule of steel easing protection.