研究目的:支挡结构属于岩土工程结构，岩土工程的极限状界定相对于结构工程更困难。本文基于国内外通行的极限状态概念，对比分析岩土工程和结构工程极限状态的共性和差异，梳理支挡结构极限状态并重点分析明挖基础和桩基础的极限状态，提出支挡结构极限状态划分的建议。研究结论:(1)广义的极限状态可理解为某项功能达到预定的要求，极限状态已经不限于破坏和失效的概念，其外延扩大至不能达到预定设计目标的要求——某项规定的限制值；(2)支挡结构属于岩土工程范畴，其极限状态包括结构整体稳定极限状态和构件结构极限状态，结构整体稳定极限状态包括:承载能力极限状态、正常使用极限状态和介于两者之间极限状态，此状态需进一步研究；(3)一般地区明挖基础压应力极限状态和岩质地基锚固桩基础侧向受压极限状态归为正常使用极限状态；(4)该结论可用于指导支挡结构极限状态设计研究。
Abstract
Research purposes:Retaining structure belongs to the geotechnical engineering structure, the limit state classification of geotechnical engineering is more difficult than the structure projects. Based on the limit state concept at home and abroad, this paper makes a comparison and analysis of the common and difference of geotechnical engineering and structural engineering limit state, teases the retaining structure limit state and focuses on limit state of open-cut foundation and pile foundation, proposes the recommendation of limit state classification of retaining structure.Research conclusions:(1) The generalized limit state can be considered as a function which can achieve the expected requirements, the limit state is not limited to the concept of damage and failure, and its extension has been expanded to the requirements of that the goal of expected design cannot be achieved——a prescribed limit. (2) Retaining structure belongs to the category of geotechnical engineering, its limit state includes structure overall stability limit states and the structural stability limit state which includes the bearing capacity limit state and serviceability limit state and limit state between them, the state needs to be studied further. (3) In general area, the compressive stress limit state of open-cut foundation and lateral pressure limit state of rock foundation anchor pile foundation can be considered as the serviceability limit state. (4) The research conclusion is useful for guiding the design research of retaining structure limit state.
关键词
支挡结构 /
岩土工程 /
极限状态 /
划分原则
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Key words
retaining structure /
geotechnical engineering /
limit state /
classification principles
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中图分类号：
U213.1
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参考文献
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