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在旧市区内，由于场地限制及环境保护要求，地下连续墙往往难以用机械成槽。对此， 广州合银广场采用人工挖孔桩成型地下连续墙施工技术，并采取在桩侧设止水凹槽等技术措施，取得了理想的效果。
In the old urban areas, underground diaphragm walls are often difficult to form mechanically due to site constraints and environmental protection requirements. In response, Guangzhou Heyin Square using artificial digging pile forming diaphragm wall construction technology, and to take the side of the pile water stop groove and other technical measures, and achieved the desired results.