Excavation Deformation And Supporting Structure And Soil Interaction

The deformation of deep foundation engineering includes deflection of retaining wall, the surface settlement behind the wall and the basal heave. It is the most important factor to ensure the pit's stability, the environmental safety around the pit, successfully constructing. It is base element for research of interaction between soil and support structure. Study on deformation mode, calculation method and limit value are the most importance and difficulty for deep pit engineering. This paper study upon monitoring information of anchor deep foundation engineering of Runyang Changjiang River Highway Bridge. Analysis its deformation. Numeric simulation method is also involved in to study upon the impact factor of deformation, such as: rigidity of retaining wall, space between bracing, cross section size of the Bracing and rigidity of soil, the study come to the conclusion as below:① The maximal horizontal displacement usually occur at 0.58 depth of the wall.② If don't take precipitation into account, then, the maximum settlement and maximum horizontal displacement can be express as d_vmax=0.65 ×d_hmax.③The settlement curve of this pit is groove like. Settlement caused by precipitation is greater than that cause by displacement of wall.④ Horizontal displacement of the wall and Earth pressure mode have better consistency. Earth pressure is at rest before condition 6, and it turn into active pressure under condition 6.⑤ Factors affecting pit deformation include rigidity of wall, space between Bracing and cross section size of the Bracing, among these factors space between Bracing is most effective. If 1m was added to original space, the maximum horizontal displacement of wall can be reduced to 70%-75%. The two other factor have smaller affect on the deformation of wall.