[1]刘志中,丁建文,王刚,等.考虑真空度衰减的真空预压沉降计算方法[J].东南大学学报(自然科学版),2016,46(1):191-195.[doi:10.3969/j.issn.1001-0505.2016.01.031]
 Liu Zhizhong,Ding Jianwen,Wang Gang,et al.Calculation method for vacuum preloading induced settlement considering vacuum degree attenuation[J].Journal of Southeast University (Natural Science Edition),2016,46(1):191-195.[doi:10.3969/j.issn.1001-0505.2016.01.031]
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考虑真空度衰减的真空预压沉降计算方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
46
期数:
2016年第1期
页码:
191-195
栏目:
土木工程
出版日期:
2016-01-20

文章信息/Info

Title:
Calculation method for vacuum preloading induced settlement considering vacuum degree attenuation
作者:
刘志中1丁建文1王刚2吉锋13田文斌1
1东南大学交通学院, 南京 210096; 2辽宁工程勘察设计院, 锦州 121000; 3南水北调东线江苏水源有限责任公司, 南京 210029
Author(s):
Liu Zhizhong1 Ding Jianwen1 Wang Gang2 Ji Feng13 Tian Wenbin1
1School of Transportation, Southeast University, Nanjing 210096, China
2Liaoning Engineering Survey Design Institute, Jinzhou 121000, China
3Jiangsu Water Source Company Ltd. of Eastern Route of South-to-North Water Diversion Project, Nanjing 210029, China
关键词:
真空度衰减速率 竖向位移 沉降计算 真空预压
Keywords:
attenuation rate of vacuum degree vertical displacement settlement calculation vacuum preloading
分类号:
TU43
DOI:
10.3969/j.issn.1001-0505.2016.01.031
摘要:
基于分层总和法和已有的真空预压沉降计算方法,考虑真空度沿排水体深度方向的衰减性状,提出了一种改进的真空预压沉降计算方法,并结合已有工程实例对其进行了验证.结果表明,真空度沿深度方向的衰减速率对沉降计算值具有显著影响.真空度衰减速率越大,沉降计算值越小.当不考虑真空度衰减时,沉降计算值较大且明显偏离实测值,误差为48.4%~93.3%;当真空度衰减速率为3.5~4.5 kPa/m时,沉降计算值和实测值相差较小,误差为-18%~10%,能够满足工程设计精度要求.因此,在进行真空预压沉降计算时应考虑真空度衰减,并建议在缺乏可靠真空度衰减实测资料时,将真空度沿深度方向的衰减速率取为3.5~4.5 kPa/m.
Abstract:
Based on the layer wise summation method and the existing calculation method for vacuum preloading induced settlement, a modified calculation method for vacuum preloading induced settlement considering the attenuation regulation of the vacuum degree along the drainage board is proposed and verified using measured datafrom literatures. The results show that the influence of the attenuation coefficient of the vacuum degree along the depth on the calculated settlement is significant. The larger the attenuation coefficient of vacuum degree, the smaller the calculated settlement. When the attenuation rate of the vacuum degree is not considered, the calculated settlement is larger and deviates significantly from the measured data with the errors of 48.4% to 93.3%. When the attenuation rates of the vacuum degree are 3.5 to 4.5 kPa/m, the calculated settlement is close to the measured one with the errors of -18% to 10%, which satisfies the precision requirements of engineering design. Therefore, the attenuation of the vacuum degree should be considered during the calculation of vacuum preloading settlement. The attenuation rates of the vacuum degree along the depth is advised to be taken as 3.5 to 4.5 kPa/m when the measured vacuum degrees along the depth are absent.

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备注/Memo

备注/Memo:
收稿日期: 2015-09-02.
作者简介: 刘志中(1990—),男,硕士生;丁建文(联系人),男,博士,副教授,jwding2006@163.com.
基金项目: 国家自然科学基金资助项目(51378118)、“十二五”国家科技支撑计划资助项目(2015BAB07B06)、水利部公益性行业科研专项资助项目(201401006)、江苏省水利科技资助项目(201309).
引用本文: 刘志中,丁建文,王刚,等.考虑真空度衰减的真空预压沉降计算方法[J].东南大学学报(自然科学版),2016,46(1):191-195. DOI:10.3969/j.issn.1001-0505.2016.01.031.
更新日期/Last Update: 2016-01-20