浅析小直径抗滑桩+锚索支护体系设计思路

Design of Small Diameter Anti-Landslide Bored Piles with Ground Anchor System

抗滑桩是防治滑坡的一种常用工程结构物,在我国,抗滑桩的设计已有一定的历史,但在具体设计过程中,受多年一些技术文件及工程经验的影响,其断面以2m×3m最为常见,嵌固段以1/3—1/2桩长为宜,但近年来,随着桩锚体系的发展,不断地探索抗滑桩的断面及嵌固段深度的设置,已成为了业内人士讨论的话题。现通过工程实例,详细介绍了小直径抗滑桩+锚索支护体系的适用范围、设计思路及布置原则,可供有关方参考。

The large diameter anti-landslide bored pile is a conventional measure in a landslide remediation design. Under the in- fluence of various industrial design codes, technical documents, as well as construction experience, the diameters of these piles are between 2 and 3 meters with a embedment depth of 1/3 to 1/2 of the pile length below the potential slip surface. With the recent development of ground anchor systems, discussions have been raised regarding the required bored pile diameter and the embedment depth. This paper presents a case history of a remediation using small diameter anti-landslide bored piles and ground anchors. Design principles of the remediation work are also introduced.