Abstract:

Lizheng software for deep foundation pit was used to analyze one side of a real project. By changing the value of pre-stress, number of anchor line and adjusting the parameter of soil pressure, the change of displacement, lengthen of anchored part and steel consumption were calculated and analyzed to study the effects of anchor-pile in foundation pit support and its influences on the surroundings. Study results showed that for one line anchor-pile, when the pre-stress increases to a certain value, pre-stress increasing was no longer useful to decrease foundation displacement, but steel consumption would be increased obviously. Two lines of anchors without pre-stress had an obvious effect on foundation deformation control, and it led to less steel consumption and slight surroundings influence. Only by selecting a proper adjustment parameter of soil pressure, letting the foundation pit to form proper displacement, the active soil pressure adopted in calculation can be closed to the practical one and the design of foundation pit support can be stable and reliable.

Key words: Lizheng software for deep foundation pit, anchor-pile, pre-stress, displacement of foundation pit, steel consumption, adjustment parameter of soil pressure