银泰.航华地下人行通道位于CBD(中央商务区)核心区,附近高楼林立,交通繁忙。通道在100多m的长度内8处下穿国贸桥桩,二次上穿地铁区间隧道,多处下穿大型市政管线,工程环境复杂程度国内外罕见。通过工程类比、数值模拟、理论分析等多种手段对桥桩的保护方案进行研究,得出洞内超前小导管、长导管注浆,结合地面单孔复合锚杆桩注浆的综合加固方式能很好地控制桥桩沉降,满足工程要求,并详细介绍了其具体做法。 Yintai.Haihua underground pedestrian passage is located in the CBD (Central Business District) core area, near the high-rise buildings, heavy traffic. Passage of more than 100 m in the length of 8 under the Guomaoqiao piles, the second on the subway tunnel, many large wear under the municipal pipeline, the complexity of the project environment rare at home and abroad. By means of engineering analogy, numerical simulation, theoretical analysis and other means, the protection scheme of bridge piles is studied. It is concluded that the small pipe advance and the long pipe grouting combined with the grouting of ground single hole composite anchor piles Control the settlement of bridge piles well to meet the engineering requirements and detail the specific practices.