微型桩在边坡抢险加固工程中的应用

Application of Micro-pile in Slope Reinforcement

微型桩以布置灵活、施工快捷、对岩土体扰动小的优点,在地质病害治理中得到广泛应用。当采用双排甚至多排布置后形成“微型桩群抗滑桩”,并顶部设置框架梁、盖板等进行串联,使微型桩形成“整体”,能提高微型桩群的整体抗弯能力和相互协调能力,形成更大锚固效果。为进一步提高微型桩群的受力性能,可在桩顶框架梁上设置预应力锚索,将被动受力的微型桩工程调整为主动受力的支挡工程,能有效降低微型桩对岩土体锚固力的要求。以某顺层滑坡为例,介绍了微型桩在边坡应急抢险工程中的应用。

Micro-pile are widely used in the treatment of geological diseases due to their advantages of flexible layout,fast construction and little disturbance to rock and soil.When the multi row arrangement is adopted,the“anti slide micro pile group”is formed,and the frame beam and cover plate are set at the top to form a“whole”,which can improve the overall bending resistance and mutual coordination ability of the micro pile group,and form a greater anchoring effect.In order to further improve the mechanical performance of micro pile group,the prestressed anchor cable is set on the frame beam at the top of the pile,and the passive micro pile project is adjusted to the ac‐tive retaining project,which can effectively reduce the requirements of micro pile on the rock and soil anchoring force.Introduces the appli‐cation of micro pile in slope emergency rescue engineering.