摘要
数值极限分析方法可以准确算出传统算法无法算出的有重土地基准确的极限承载力。由此可见,数值极限分析比传统的解析算法能更好解决复杂的岩土工程问题。利用荷载增量法,该法应用了工程材料受力从量变到质变的破坏原理,随着基础荷载的逐步增加,土基受力由弹性逐渐过渡到塑性,最后达到极限破坏状态,进而得到对应的极限荷载值。结合工程算例求得了条形基础荷载下地基的极限承载力,并与传统的Terzaghi、Vesic、Chen三种经验结果进行了比较,表明数值极限分析法可比Terzaghi、Vesic、Chen经验法分别节省基础工程量40%、20%和相近。目前Terzaghi公式和Vesic公式均在实际工程中得到应用,Chen公式尚未见应用。
The traditional algorithm is unable to accurately calculate the ultimate bearing capacity of heavy soil foundation,whereas numerical limit analysis methods can do so precisely.It can be seen that numerical limit analysis can solve geotechnical engineering problems more complex than traditional analytical methods.The incremental load method is used,which applies the principle of failure of engineering materials from quantitative to qualitative changes in stress.As the foundation load gradually increases,the stress on the soil foundation transitions from elastic to plastic,and finally reaches the ultimate failure state,obtaining the corresponding ultimate load value.The ultimate bearing capacity of the foundation under strip foundation load was obtained by combining engineering examples,and compared with the traditional empirical results of Terzaghi,Vesic,and Chen.The results show that the numerical limit analysis method can save 40%,20%,and similar foundation engineering quantities compared to Terzaghi,Vesic,and Chen empirical methods,respectively.At present,both Terzaghi formula and Vesic formula are applied in practical projects,while Chen formula has not been applied yet.
作者
郑颖人
阿比尔的
杨莹明
Zheng Yingren;Abi Erdi;Yang Yingming(Chongqing Jiaotong University,Chongqing 400074;Engineering University of the Joint Logistics Support Force,PLA,Chongqing 401311)
出处
《地下空间与工程学报》
北大核心
2025年第6期1884-1887,共4页
Chinese Journal of Underground Space and Engineering
基金
重庆市自然科学基金院士专项(cstc2021yszx-jcyjX0002)
青年科学基金(41907261)。
关键词
黏性土地基
数值极限分析
荷载增量法
条形基础极限承载力
有重土经验法
sticky soil foundation
numerical limit analysis
load increment method
ultimate bearing capacity of strip foundation
empirical method for heavy soil foundation
