This paper introduced practical construction of retaining and protecting engineering of super deep circle-foundation pit using compound reverse construction method,make use of drilled pile,rock bolt and chemical churning pile to retain and protect,make use of controlled blasting method to cut rock in the pit.

Based on the actual monitoring data of the diaphragm wall support structure in circular deep foundation pit,authors analyze the change law and the deformation mechanism of the lateral displacement of diaphragm wall during excavation.

Application of soil nailing wall support in extra deep foundation pit;

Furthermore,the authors analyze the influence of extra deep foundation pit construction on groundwater environment, which provides scientific hydrogeological basis for.

Design and calculative analysis of retaining structures for ultra-large and ultra-deep foundation pits;

Study on Design Method and Water-Soil-Retaining Structure Interaction of Ultra-deep Foundation Pit;

Centrifuge model tests on deformation of ultra-deep foundation pits in soft ground