浅论岩土工程极限状态设计基本思想

Basis of Geotechnical Engineering Limit State Design

论述了岩土工程极限状态设计的基本思想,包括极限状态的概念、土工参数设计值的确定过程和方法、构造物的重要度和场地地基复杂程度的划分、岩土工程类别、作用载荷组合、分项安全系数和极限状态设计等;给出了土工参数的实测值、导出值、标准值和设计值的确定原则或方法;指出在极限状态设计中,可通过增大设计作用效应或降低设计抗力的方法来进行岩土工程的可靠性设计。

Some bases of geotechnical engineering limit state design, such as concepts of limit state, geotechnical parameter,category and risk and partial safety factors,are introduced in this paper. Due to geological complicity and uncertainty,the geotechnical parameters should be carefully determined by means of statistics based on engineering judgement. As performance is different because of the category and risk of the structure and geotechnical category,service ability limit state,modifiability limit state and ultimate limit state are designed using partial safety factors according to design load effect or design resistance.