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近年来,随着城市建设步伐的不断加快,城市建设用地日益减少,使得我们更多地向高度上寻找发展空间,高层建筑不断增加,深基坑工程愈来愈多。但由于城市中深基坑工程常处于密集的既有建筑物、道路桥梁、地下管线、地铁隧道或人防工程的近旁,造成深基坑难以放坡开挖,或基坑宽度较大、较深,对支护结构采用内支撑的方法不经济或不可能。在这种情况下采用土层锚杆支撑支护结构(护坡桩、钢板桩、连续墙等),维护深基坑的稳定,对简化支撑,改善施工条件和加快施工进度能起很大的作用。目前,在深基础工程施工中应用此工艺日渐增多。
In recent years, with the accelerating pace of urban construction and the decreasing use of urban construction land, we are looking more for space for development, increasing high-rise buildings and more and more deep-foundation pit works. However, deep foundation pit projects in cities are often located close to existing buildings, roads and bridges, underground pipelines, subway tunnels or civil air defense projects, which makes it difficult to excavate deep foundation pit with large excavation width or deeper , It is uneconomical or impossible to adopt internal support for the support structure. In this case, the use of soil anchor support structure (slope protection piles, sheet piles, continuous walls, etc.) to maintain the stability of deep foundation pit can play a significant role in simplifying support, improving construction conditions and speeding up the construction schedule . At present, the application of this technology in deep foundation construction is increasing day by day.