The excavation of deep foundation pit in soft soil region is comprehensive difficulty in geotechnical engineering.

软土地区深基坑开挖是基础和地下工程施工中一个综合性岩土工程难题。

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The support structure during the excavating of deep foundation pit is difficult, especially in the dense buildings, high groundwater level and thick soft soil area.

深基坑开挖支护是基坑施工的重点，尤其是在建筑密集、地下水位高、厚软土地区的深基坑支护，更是工程界关注的难题。

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Foundation pit project of Zhengda Plaza in Pudong New Area is one of the macro-type deep foundation pit engineerings in soft soil foundation of Shanghai area.

上海浦东正大广场基坑工程是上海地区软土地基中特大型深基坑工程。

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