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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (7): 1157-1163    DOI: 10.3785/j.issn.1008-973X.2013.07.004
土木工程     
飞机荷载作用下超载预压软土地基的长期沉降
蔡袁强,刘新峰,郭林,孙宏磊,曹志刚
浙江大学 软弱土与环境土工教育部重点实验室,浙江 杭州 310058　　
Long-term settlement of surcharge preloading foundation in soft clay area induced by aircraft loads
CAI Yuan-qiang,LIU Xin-feng,GUO Lin,SUN Hong-lei,CAO Zhi-gang
MOE Key Laboratory of Soft Soils and Geoenviromental Engineering,Zhejiang University,Hangzhou 310058,China    
 全文: PDF 
摘要：

为了研究超载预压地基在飞机荷载作用下的长期沉降,通过对温州淤泥质黏土进行室内循环三轴试验,建立饱和软黏土的累积塑性应变模型和累积孔压模型.利用层状弹性理论计算地基中的动偏应力,结合已建立的经验模型得到在交通荷载作用下软土地基的累积塑性应变和孔压消散应变.采用分层总和法计算飞机荷载作用下温州机场跑道超载预压地基的长期累积沉降,将计算沉降值与实测沉降值进行对比,验证了饱和超固结土不排水累积塑性应变模型和累积孔压模型的合理性.
关键词： 累积塑性应变模型;  累积孔压模型;  飞机荷载;  超载预压;  长期沉降    
Abstract:

Cumulative plastic strain model and excess pore pressure model were proposed by cyclic triaxial tests conducted on Wenzhou soft clay in order to analyze the long-term settlement of surcharge preloading foundation under aircraft loads. Combining with the dynamic deviator stress calculated by multilayer elastic theory and the established experience model, the cumulative plastic strain and the strain induced by pore pressure dissipation of the soft ground under traffic loading were obtained. The long-term sediment of the preloaded lane of Wenzhou airport under the airplane loading was calculated by summation of sub-layers and verified with the in-situ test results. Then the reasonability of the undrained cumulative plastic strain model and the cumulative pore pressure model of over-consolidated soil was validated．
Key words: cumulative plastic strain model    cumulative excess pore pressure model    aircraft loads    surcharge preloading    long-term settlement
出版日期: 2013-08-15
:  TU 443  
基金资助:

国家杰出青年科学基金资助项目（51025827）； 国家自然科学基金资助项目（51108414）
作者简介: 蔡袁强（1965-），男，教授，博导，从事土动力学、基础工程学的研究.E-mail：caiyq@zju.edu.cn
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引用本文:

蔡袁强,刘新峰,郭林,孙宏磊,曹志刚. 飞机荷载作用下超载预压软土地基的长期沉降[J]. J4, 2013, 47(7): 1157-1163.

CAI Yuan-qiang,LIU Xin-feng,GUO Lin,SUN Hong-lei,CAO Zhi-gang. Long-term settlement of surcharge preloading foundation in soft clay area induced by aircraft loads. J4, 2013, 47(7): 1157-1163.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2013.07.004    或    http://www.zjujournals.com/xueshu/eng/CN/Y2013/V47/I7/1157

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