The New Structure Backgage Of Pile Top Of Vertical Anchor Pile Retaining Wall’s Proposed And Its Design Method

Anti-slide pile retaining wall structure system has a great retaining force, small damage to environment, the construction characteristics of mature technology, etc.and has a particularly important role in slope engineering.For the slope engineering of environmental restrictions, complex geological conditions, slope height, most of them are using anti slide pile retaining structure system.In terms of slope engineering, anti slide pile retaining structure system has become a major branch of high,big, difficult slope supporting system. Although the anti slide pile retaining structure has been widely used,and has become a classic soil retaining structure system, but there are still many problems to be solved, one of the biggest drawback is the high cost.Paper in view of the "bedrock is low and flat, and steep slope" of geological conditions,analyzing and comparing the existing traditional cantilever pile retaining structure,oblique Prestressed Cable Anchor Pull pile, portal double row piles’ s deficiency,put forward the new structure backgage of pile top of vertical anchor pile retaining wall.The retaining structure has expanded anchor pile of applications, saved construction cost and reduced dependence on horizontal anchor tensile condition, etc.But its vertical layout anchor cable of the retaining structure and slope displacement and thrust direction roughly vertical, led to the stress of anchor rope in a very bad,In view of this, this paper puts forward with the sleeve isolation avoidance measures(i.e. around the anchor set a certain diameter of the sleeve, in under the action of the soil pressure and landslide thrust can produce certain slip space to protect the anchor effect) to be addressed.In addition, the bending moment of pile and horizontal displacement of pile are two important indexes of anti-slide pile retaining structure, this article adopted the method of theoretical derivation to obtain the analytic solution of bending moment of pile body and horizontal displacement of pile body, and used the large-scale finite element analysis software MIDAS GTS verify the Correctness of theoretical derivation’s. For isolating collision avoidance technology in this paper, from the two aspects of isolated method and structure, in fact is solving the problem of isolation sleeve inside diameter and wall thickness.Finally, through an engineering example to summarize and put forward a set of suitable for the retaining structure design and calculation steps,to provide reference for the study of retaining structure engineering design and subsequent academic.