A NUMERICAL METHOD FOR DETERMINING PRE-CONSOLIDATION PRESSURE

CAI Qingchi; XIE Hankang

doi:10.13204/j.gyjzG20061201

Volume 51 Issue 5

Sep. 2021

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2021 > 51(5): 164-167,187

Hou Hetao, Li Guoqiang, Wang Youquan, Qi Lixin, Tang Hongwei. THE APPLICATION OF UNBONDED PRESTRESSED TECHNIQUE TO CYLINDRICAL SHELL WITH BIG DIAMETER AND THE ANALYSIS OF TESTS[J]. INDUSTRIAL CONSTRUCTION, 2004, 34(2): 25-27,78. doi: 10.13204/j.gyjz200402009

Citation:

CAI Qingchi, XIE Hankang. A NUMERICAL METHOD FOR DETERMINING PRE-CONSOLIDATION PRESSURE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 164-167,187. doi: 10.13204/j.gyjzG20061201

Citation:

CAI Qingchi, XIE Hankang. A NUMERICAL METHOD FOR DETERMINING PRE-CONSOLIDATION PRESSURE[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(5): 164-167,187. doi: 10.13204/j.gyjzG20061201

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A NUMERICAL METHOD FOR DETERMINING PRE-CONSOLIDATION PRESSURE

doi: 10.13204/j.gyjzG20061201

Department of Civil Engineering, Ningde Normal University, Ningde 352100, China

Received Date: 2020-06-12
Available Online: 2021-09-16
Publish Date: 2021-09-16

Abstract

Abstract

The Casagrande method is a famous graphic method to obtain pre-consolidation pressure from consolidation test data, in which the one of the procedures is fitting the second half curve of compression curves based on the point of the greatest curvature. In the light of complexity and hard to control proper scales for the traditional graphic method, a program was developed by the software of MATLAB to calculate pre-consolidation pressure. Analysis on the deficiency of Harris Model on processing compression curves and taking account of disturbed factors for soil specimens, a new parameter from test was adopted, and the modified calculation method about the pre-consolidation pressure was proposed based on Harris model. It was shown that the calculated results by the modified method accorded with the actal pre-consolidation pressure for tests at medium and high pressure. Furthermore, soil consolidation experiments should contain higher pressure which could be 1 600 to 3 200 kPa.
- pre-consolidation pressure,
- Harris model,
- numerical calculation

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References(13)

References

[1]	魏道垛, 胡中雄. 上海浅层地基土的前期固结压力及有关压缩性参数的试验研究[J]. 岩土工程学报, 1980, 2(4):13-22.
[2]	王清, 陈剑平, 蒋惠忠. 先期固结压力理论的新认识[J]. 吉林大学学报(地球科学版), 1996(1):59-63.
[3]	刘春平, 李中秋, 张书宪. 如何确定土的先期固结压力的探讨[J]. 地质与勘探, 2003(1):91-92.
[4]	钱家欢, 殷宗泽. 土工原理与计算[M]. 北京:中国水利水电出版社, 1980:179-180.
[5]	李春林, 丁启朔, 陈青春. 水稻土的先期固结压力测定与分析[J]. 农业工程学报, 2010, 26(8):141-144.
[6]	常林越, 王金昌, 朱向荣. 确定土体前期固结压力的非参数化拟合模型[J]. 岩土力学, 2009, 30(5):1337-1342.
[7]	姜安龙, 赵春分, 高大钊. 确定先期固结压力的数学模型法[J]. 岩土力学, 2003, 24(2):292-295.
[8]	王志亮, 郑明新, 李永池. 求前期固结应力的数学模型研究及应用[J]. 岩土力学, 2005, 26(10):66-69.
[9]	郎林智, 陈鹏宇, 聂良佐, 等. 基于Gaussian模型的先期固结压力确定[J]. 水电能源科学, 2011, 29(7):47-49 , 194.
[10]	曹宇清, 吴永, 安向勇, 等.考虑应力历史和应力水平影响的土体压缩模量计算方法[J]. 工程地质学报, 2019, 27(4):760-765.
[11]	李广信, 张丙印, 于玉贞.土力学[M].2版.北京:清华大学出版社, 2013.
[12]	姜安龙, 郭云英, 高大钊. 确定先期固结压力的试验研究[J]. 南昌航空工业学院学报(自然科学版), 2003, 17(3):5-8.
[13]	刘林, 鲁晓兵, 王淑云. 确定前期固结压力的一个简单数学模型[J]. 土木工程学报, 2019(增刊2):30-34.