Stability on Supporting Structure of Deep Foundation Pit with Infiltration

Abstract

The FLAC3D was used to the fluid-solid coupling numerical simulation of considering the initial state of unsaturated to soil for the deep foundation pit engineering under different rainfall infiltration conditions. By comparing the bending moment, the shearing stress and internal forces of support under the infiltration conditions between non-rainfall and rainfall, the paper focus on the stability of deep foundation pit. Research on the stability of deep excavation under rainfall conditions was a useful attempt. From the detail study of the stability of a foundation pit of Qinhuangdao under rainfall infiltration conditions, the paper have drawn some useful conclusion on the design of building foundation pit, which can be the basis of excavation design and construction under rainfall conditions.

Calculation Method of Soil-Column Area Replacement Ratio in the Composite Foundation

“…6, it is concluded that the error ratio of m value is below 10% when n is less than 5. It has been pointed out that pile-soil interaction can be greatly activated and subgrade bearing capacity can be further improved when the pile spacing ranges from 1.5 to 3 times the length of a single pile diameter with common value of 600 mm [4,5]. Taking d of 600 mm and d/s of 1/3, L= ns+d = 5×3×0.6 + 0.6 = 9.6 m. Therefore, the general equation Eq.…”

Design of the Supporting Structures for Large and Unusually Shaped Foundation Pit near the Yangtze River

“…ick, loose sediments of Quaternary age are widely distributed across this area. Deep foundation pit engineering is mostly conducted in the soft soil of the Holocene [1][2][3][4]. e designers have generally focused on the construction costs and time, the overall development process, the progress of construction, and the mutual influence of adjacent foundation pits [5][6][7], while largely ignoring the rational use of geological conditions at the construction sites.…”