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最近一些年来,锚定式挡土结构发展很快,在国外,采用锚杆式结构支撑临时性或永久性开挖已相当普遍。在国内,铁路路基支挡工程中已大量使用锚杆挡墙,锚杆结构还用于水坝及支护工程。近十几年,铁道部研究使用了多层锚定板桥台和挡墙。在路内和路外建成多处锚定板桥台和锚定板挡墙,并已鉴定通过了《旱桥锚定板桥台设计原则》。由于这是一种新型的结构形式,在设计方法上尤其是锚定板挡墙的稳定性检算方法上还有很大争议,尚需做进一步研究。并不断在实践中验证。本文就目前国内外在锚定式挡土结构中使用的一些整体稳定检算方法做些简单介绍并进行讨论如下。
In recent years, the anchored retaining structure has developed rapidly. In other countries, it is quite common to adopt the bolt-type structure to support temporary or permanent excavation. In China, a large number of anchor retaining walls have been used in railway subgrade retaining works. Anchor structures are also used in dams and supporting works. In the past ten years, the Ministry of Railways used multi-layer anchorage plate abutments and retaining walls. In the road and the road to build a number of anchor plate abutment and anchor plate retaining wall, and has been identified through the “dry bridge anchor plate abutment design principles.” Since this is a new type of structure, there is still much controversy in the design method, especially the stability checking method of anchoring plate retaining wall, which needs further study. And continue to verify in practice. In this paper, some methods of global stability estimation used in anchored retaining structures at home and abroad are briefly introduced and discussed below.