(概述) 所谓“土层钉固”(Soil nailing)就是按一定规则布设金属杆件来加固原状土体。该技术已经发展成为一种既经济又安全地加固土体的方法。本文论述了在几乎无粘性土垂直挖方土层钉固的一些土力学性质,简述了四年研究发展进度的意图与范围,其中包括四个大型现场试验情况。在施工阶段和安全加载状态下的土压力与变形数据将有助于我们建立一些设计准则。本文主要部分研讨的是极限状态。根据现场试验与室內模型试验,对各种破坏机制 (Overview) The so-called “soil nailing” (Soil nailing) is based on the rules laid metal rod to strengthen the original soil. This technique has evolved as a way to both economically and safely reinforce soils. This paper discusses some soil mechanics properties of nailing in almost uncured soil with almost clayey soil, and briefly describes the intension and scope of four years of research and development progress, including four large-scale field trials. Earth pressure and deformation data during the construction phase and safely loaded state will help us to establish some design criteria. The main part of this paper is about the limit state. According to field test and indoor model test, a variety of damage mechanisms