永久船闸高强锚杆施工技术及质量安全控制

三峡永久船闸主体段长1657 m,基础开挖后形成40～170 m的高边坡,闸室边墙高45～68m,由于断层、裂隙、开挖爆破震动及应力释放等原因,直接影响了直立边坡的稳定.闸墙混凝土采取薄衬砌墙型式,为保证直立坡岩体和衬砌墙混凝土的稳定安全,考虑两者联合作用,设计采用高强锚杆对其进行支护,设计总量达9万余根,施工后砂浆强度及拉拔检测均满足设计要求.

Installation and quality control of high strength anchor bars

After foundation excavation the high slopes of 40 - 170 m were formed at the main section of 1 657 m in length of the Three Gorges shiplock, with a height of the chamber wall up to 45 - 68 m. Influenced by faults, fractures, blasting vibration and stress release, the stability of the vertical walls could be in bad position. To improve the stability of the thin concrete lining and high slopes, totally up to more than 90 000 high strength anchor bars were employed. From the results of mortar strength and pull tests after construction, the measures can meet the design requirements.