用预应力锚索整治公路人工构造物病害

The Prestressed Anchor Ropes for Retrofitting Damaged Highway Structures

各种公路人工构造物常会发生过大的变形或损坏,如不及时整治,就会发展成为病害工程。本文通过几个工程实例,介绍了采用预应力锚索整治病害工程这一新方法的基本原理和治理效果。将锚索的一端嵌固于稳定基岩(或结构物)内,另一端与拟整治的构造物相连,然后对锚索施加预应力,从而达到整治病害工程的目的。近年来,作者采用这种方法整治了高挡土墙的倾覆变形、闲受滑坡推力作用而滑移的挡土墙、偏压拱肋变形开裂和加固桥台等十余处病害工程,都取得了十分显著的效果。一般可节省投资60％左右。

A great variety of highway structures suffered large deformations and damages.Such structures should be retrofitted immediately in order to prevent their failure.In this paper,the basic principle and the results of the retrofitting of the damaged structures by a new method of prestressed anchor ropes are presented.One end of the anchor ropes is embeded in stable rock (or other strong structures),while the other is connected to the damaged structure and then the anchor are post—stressed.In recent years,the new method has been used to retrofit highretaining walls experienced rotation damage and sliding by landslide thrust as well as arch rib cracked by eccentric compression and abutment,etc.to a great success with a cost saving of approximately 60%.