High-steep Slope Retaining Structure In High Intensity Earthquake Zone

2008 "5.12" Wenchuan earthquake caused a large number of serious construction damages and heavy loss of lives and properties. In the earthquake, a large numberof roads, railways and retaining structures destroyed, which bring great obstacles to the reopened and remain open of earthquake zone. Judging from the field investigation of slope retaining structures of earthquake zone, retaining walls and other traditional gravity retaining have more serious structural damage, and indicating that is not suitable for high intensity earthquake zone, however the anti-slide pole board wall,in particular, anchor anti-slide pole board wall rarely damaged in the earthquake, which reflecting the excellent seismic performance of anti-slide pole board wall.This paper carry out studies of slope failure mechanism and its supporting structure—anti-slide pole board wall of Seismic Design and seismic stability in the high intensity earthquake zone.①This paper study the distribution and damage mechanism of landslide in the high intensity earthquake zone, meanwhile, the paper analyzed and summarized relationships of earthquake motion parameters and landslides which earthquake induced.②This paper investigate and summarize earthquake damage of retaining structures, such as retaining wall, anti-slide pole board wall, prestressed anti-slide pole board wall in high intensity earthquake zone.③The paper Summarized and summed up the design of anti-slide pole board wall and prestressed anti-slide pole board wall ,on this basis, The paper study the design parameters of anti-slide pole board wall, meanwhile, it takes seismic stability analysis of Several important design parameters.④On the basis of studying of design parameters of anti-slide pole board wall, the Paper calculated and analyzed main design parameters of anti-slide pole board wall,such as pile depth, pile spacing, anchoring which is more obvious of the seismic stability, at last comparison the existing norms, the paper have the seismic simplify design and analysis of these parametersThrough investigation,analysis,summarized,analytical calculations and engineering example, it is showed the following conclusions:①Survey by Wenchuan earthquake shows that, collapse and the landslide is the most common and most devastating damage in the form of slope, and the earthquake triggered landslides significant vertical force.②Slope height and slope greater impact on slope stability. Location of slope determines the influence of riftzone slope stability. The survey of high slope of the earthquake-stricken areas through the retaining structure indicate that compared to conventional retaining structures, anti-slide pole board wall seismic performance well.③Through analysis we can find the value of landslide thrust enhanced with seismic intensity and slide thrust increases linearly with the value ofφis more sensitive to the changes. Design Parameters of anti-slide pole board wall have different effects on the seismic stability. Internal force of pile under the action of high-intensity earthquake and internal force of pile under ordinary circumstance were quite different.④Analytical results show that the slope and the depth of earthquake intensity have greater impact on the parameters of anchor, pile spacing, anchorage, at last ,the paper bring the corresponding improvement formula.