深基坑工程逆作法的理论与计算

把高层建筑与地基基础共同作用理论引伸到深基坑工程的逆作法，考虑地下墙的共同作用，形成比较完整的深基坑工程的逆作法理论和方法。利用编制的程序，可以计算逆作法和半逆作法施工过程中各个工况的地下墙、楼板、立柱桩以及基础(筏或箱)板浇注后的受力和变形，此外，还可计算地下墙和桩的荷载分担等。结合上海一幢高238 m，60层的超高层建筑带10层的裙房，桩筏基础，深为18.95～24.00 m和面积22 000 m2的基坑工程进行计算，以图与表阐述逆作法的特点，并与实测结果对比分析，说明该理论的合理性和可行性，有助于提高深基坑工程的设计与施工水平。

Theory and computation of up-down construction method for deep excavation engineerings

The theory of interaction between superstructure and foundation including pile foundation how to be extended to the up-down construction method is expounded in detail. With this program, the force and deformation in the diaphragm wall, slab and mid-post pile at the different stages of consruction and raft. or box foundation before and after pouring of concrete can be computed. The load-sharing between piles and diaphragm wall can be also computed. And then, a 238m high and 60-storey super-tall building with 10-storey podium, excavation depth of 18.75-24.00 m and area of 22 000 m^2 is taken for example to compute the force and deformation at the different stages of up-down construction. The comparison of deformation between the monitoring and computed results demonstrates the feasiability and reasonableness of interaction theory presented here. Evidently, this theory can provide a good condition for improving the design and construction level.