围岩大变形是地下工程中危害极大的一种地质灾害。
Peripheral rock large deformation is a kind of great hazardous geology casualty of underground engineering.
提出了隧道工程围岩大变形类型、机制系统的划分原则和分类体系。
The thesis presents classified principle and system of types and mechanism of Great Wall rock distortion of tunnel engineering.
隧道围岩大变形是目前公路、铁路隧道建设中遇到的重要科学问题。
The squeezing problem is one of the most tuff problems that appear during the construction of highway and railway tunnels.
由于场区地应力比较高，在开挖期间出现了局部围岩的大变形及岩爆、喷混凝土层剥落等不良现象。
Due to high in situ stress in the powerhouse area, important deformation of local surrounding rock, rock burst, shotcrete spalling occur during excavation.
大变形围岩的锚杆支护设计一般还是采用经验类比法，主要原因之一是不能合理确定锚杆的承载能力。
The bolting design of large deformation surrounding rock usually depends on experience, one of the main reasons is the bearing capacity of bolts.
基于陈至达提出的大变形问题基础理论，指出了以传统小变形理论研究软弱围岩隧道大变形问题存在的弊端。
Based on the basic principle of large deformation body put forward by Chen Zhida, it is unreasonable to study large deformation tunnel with small deformation theory.
摘要深部巷道围岩的高应力、大变形特点，要求支护系统具备高强让压的特性。
Abstract: Due to high stress and large deformation of deep roadway surrounding rock, the support system must have high-strength yielding characteristics.
泥岩隧道围岩软弱，地应力强烈，易坍塌大变形，修建困难。
Due to the weak surrounding rock, high ground stress. easy collapse and big deformation, the construction of tunnels with mudstone were very difficult.
通过全面分析前人的研究成果，可以将隧道围岩相对变形3%作为划分隧道内是否发生大变形的定量评价指标。
According to the research findings made by others, the tunnel strain of 3% can be adopted as a qualitative classification criterion to judge whether there is a severe squeezing problem.
通过全面分析前人的研究成果，可以将隧道围岩相对变形3%作为划分隧道内是否发生大变形的定量评价指标。
According to the research findings made by others, the tunnel strain of 3% can be adopted as a qualitative classification criterion to judge whether there is a severe squeezing problem.
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