珊瑚礁砂与标准砂场地液化特征动力离心试验研究

doi:10.13722/j.cnki.jrme.2022.1263

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (64298 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要珊瑚礁砂场地液化特性与抗液化处理措施是热带港口建设的关键问题之一。基于动力离心模型平行试验，从超静孔压、场地放大效应、地表沉降及反演分析剪切模量和阻尼比等方面，对比珊瑚礁砂和标准砂自由场地的地震液化特征。结果表明：相同条件下，珊瑚礁砂场地触发液化的荷载强度要显著高于标准砂场地，而液化深度明显小于标准砂场地。在0.2 g和0.3 g正弦波输入荷载下，珊瑚礁砂场地的加速度放大系数明显小于标准砂场地。0.05 g～0.3 g序列输入荷载下，珊瑚礁砂场地的累计地表沉降约为标准砂场地的2/3。场地液化后，珊瑚礁砂场地的剪应变要高于标准砂场地而剪应力小于标准砂场地。非液化土层，在0.2 g和0.3 g正弦波等强输入荷载下，珊瑚礁砂场地的剪应力和剪应变均小于标准砂。相同条件下，珊瑚礁砂场地的剪切模量随剪应变的衰减速率要快于标准砂场地。0.05 g～0.3 g序列输入荷载下，珊瑚礁砂场地的阻尼比均略小于标准砂场地。研究成果为认识珊瑚礁砂场地的液化特征和港口工程抗液化性态设计，提供了重要指导依据和丰富数据。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：土力学, 珊瑚礁砂, 动力离心试验, 液化, 放大效应, 剪切模量, 阻尼比

Abstract：The liquefaction characteristics and anti-liquefaction treatment measures of coral sand sites are one of the key issues in the construction of tropical ports. Based on the dynamic centrifuge model parallel test，the seismic liquefaction characteristics of coral sand and standard sand in free fields are analyzed from the aspects of excess pore water pressure ratio，site amplification effect，surface subsidence，shear modulus and damping ratio. The results show that the load intensity triggering liquefaction of coral sand site is significantly higher than that of standard sand site，and the liquefaction depth is significantly lower than that of standard sand site under the same conditions. The acceleration amplification coefficient of coral sand site is obviously smaller than that of standard sand under the loads of 0.2 g and 0.3 g sine wave. The cumulative surface subsidence of coral sand site is about 2/3 of that of standard sand site under 0.05 g–0.3 g sequence loads. In liquefied soil layer，the shear strain of coral sand site is higher than that of standard sand site and the shear stress is lower than that of standard sand site. In the non-liquefied soil layer，under the strong loads of 0.2 g and 0.3 g sine wave，the shear stress and shear strain of coral sand site are smaller than that of standard sand. The attenuation rate of shear modulus of coral sand site with shear strain is faster than that of standard sand site under the same conditions. The damping ratio of coral sand site is slightly smaller than that of standard sand site under 0.05 g–0.3 g sequence loads. The research results provide important guidance basis and rich data for understanding the liquefaction characteristics of coral sites and designing the anti-liquefaction behavior of port engineering.

Key words： soil mechanics coral sand dynamic centrifuge test liquefaction amplification effect shear modulus damping ratio

引用本文:

陈平山1，2，梁小丛1，2，王体强3，4，王德咏1，2，王永志3，4，樊旭3，4，陈卓识3，4，袁晓铭3，4. 珊瑚礁砂与标准砂场地液化特征动力离心试验研究[J]. 岩石力学与工程学报, 2023, 42(9): 2283-2294.
CHEN Pingshan1，2，LIANG Xiaocong1，2，WANG Tiqiang3，4，WANG Deyong1，2，WANG Yongzhi3，4，. Dynamic centrifuge model test study on liquefaction characteristics of #br# coral sand and standard sand #br#. , 2023, 42(9): 2283-2294.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.1263 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I9/2283

[3]	虞海珍，汪稔. 钙质砂动强度试验研究[J]. 岩土力学，1999，20(4)：6-11.(YU Haizhen，WANG Ren. The cyclic strength test research on calcareous sand[J]. Rock and Soil Mechanics，1999，20(4)：6-11.(in Chinese))
[4]	孙吉主，汪稔. 三轴压缩条件下钙质砂的颗粒破裂过程研究[J]. 岩土力学，2003，24(5)：822-825.(SUN Jizhu，WANG Ren. Study on particle failure process of calcareous sand under triaxial compression[J]. Rock and Soil Mechanics，2003，24(5)：822-825.(in Chinese))
[1]	汪稔. 海上静力触探简介[J]. 岩土力学，1986，7(2)：67-71.(WANG Ren. The cone penetration tests on seabed[J]. Rock and Soil Mechanics，1986，7(2)：67-71.(in Chinese))
[2]	许宁. 浅谈珊瑚礁岩土的工程地质特性[J]. 岩土工程学报，1989，11(4)：81-88.(XU Ning. Discussion on engineering geological properties of coral reefs[J]. Chinese Journal of Geotechnical Engineering，1989，11(4)：81-88.(in Chinese))
[12]	LYU W，YUAN Y，CHEN P，et al. Seismic liquefaction of saturated calcareous sands：dynamic centrifuge test and numerical simulation[J]. Apple Science，2022，12：8 701.
[5]	刘崇权，单华刚，汪稔. 钙质土工程特性及其桩基工程[J]. 岩石力学与工程学报，1999，18(3)：331-335.(LIU Congquan，SHAN Huagang，WANG Ren. The geotechnical characteristics of calcareous soils and the pile foundation engineering[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(3)：331-335.(in Chinese))
[7]	高冉，叶剑红. 中国南海吹填岛礁钙质砂动力特性试验研究[J]. 岩土力学，2019，40(10)：3 897-3 908.(GAO Ran，YE Jianhong. Experimental investigation on the dynamic characteristics of calcareous sand from the reclaimed coral reef islands in the South China Sea[J]. Rock and Soil Mechanics，2019，40(10)：3 897-3 908.(in Chinese))
[8]	梁珂，陈国兴，刘抗，等. 饱和珊瑚礁砂最大动剪切模量的循环加载衰退特性及预测模型[J]. 岩土力学，2020，41(2)：601-611.(LIANG Ke，CHEN Guoxing，LIU Kang，et al. Degradation properties and prediction model of maximum shear modulus of saturated coral sand under cyclic triaxial loading[J]. Rock and Soil Mechanics，2020，41(2)：601-611.(in Chinese))
[10]	吴琪，杨铮涛，刘抗，等. 细粒含量对饱和珊瑚礁砂动力变形特性影响试验研究[J]. 岩土工程学报，2022，44(8)：1 386-1 396. (WU Qi，YANG Zhentao，LIU Kang，et al. Experimental study on influences of fines content on dynamic deformation characteristics of saturated coral sand[J]. Chinese Journal of Geotechnical Engineering，2022，44(8)：1 386-1 396.(in Chinese))
[13]	LIU H，ZHANG J，ZHANG X，et al. Seismic performance of block-type quay walls with liquefiable calcareous sand backfill[J]. Soil Dynamics and Earthquake Engineering，2020，132(5)：106092.
[15]	袁晓铭，张文彬，段志刚，等. 珊瑚土工程场地地震液化特征解析[J]. 岩石力学与工程学报，2019，38(增2)：3 799-3 811. (YUAN Xiaoming，ZHANG Wenbin，DUAN Zhigang，et al. Analysis for characteristics of seismic liquefaction in engineering sites of coralline soils[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 799-3 811.(in Chinese))
[17]	王体强，王永志，袁晓铭，等. 自适应鲁棒加速度积分新方法与可靠度分析[J]. 岩石力学与工程学报，2021，40(增1)：2 724-2 737. (WANG Tiqiang，WANG Yongzhi，YUAN Xiaoming，et al. A new type of adaptive robust acceleration integration approach and reliability analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.1)：2 724-2 737.(in Chinese))
[18]	ZEGHAL M，ELGAMAL A W，TANG H T，et al. Lotung downhole array. II：Evaluation of soil nonlinear properties[J]. Journal of Geotechnical Engineering，1995，121(4)：363-378.
[20]	王永志，WILSON D W，KHOSRAVI M，等. 动力离心模型试验循环剪应力-剪应变反演方法对比[J]. 岩土工程学报，2016，38(2)：271-277.(WANG Yongzhi，WILSON D W，KHOSRAVI M，et al. Evaluation of cyclic shear stress-strain using inverse analysis techniques in dynamic centrifuge tests[J]. Chinese Journal of Geotechnical Engineering，2016，38(2)：271-277.(in Chinese))
[22]	王体强，王永志，梁小丛，等. 超重力模型试验干-饱和砂动剪切模量阻尼比特性研究[J]. 岩石力学与工程学报，待刊.(WANG Tiqiang，WANG Yongzhi，LIANG Xiaocong，et al. Study on the characteristics of shear modulus and damping ratio between dry sand and saturated sand in centrifuge model test[J]. Chinese Journal of Rock Mechanics and Engineering，to be pressed(in Chinese))
[23]	HARDIN B O，DRNEVICH V P. Shear modulus and damping in soils：design equations and curves[J]. Journal of the Soil Mechanics and Foundations Division，1972，98(7)：667-692.
[28]	GIANG P H H，IMPE P O V，IMPE W F V，et al. Small-strain shear modulus of calcareous sand and its dependence on particle characteristics and gradation[J]. Soil Dynamics and Earthquake Engineering，2017，100(9)：371-379.
[6]	马维嘉，陈国兴，李磊，等. 循环荷载下饱和南沙珊瑚礁砂的液化特性试验研究[J]. 岩土工程学报，2019，41(5)：981-988.(MA Weijia，CHEN Guoxing，LI Lei，et al. Experimental study on liquefaction characteristics of saturated coral sand in Nansha Islands under cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2019，41(5)：981-988.(in Chinese))
[9]	吴杨，崔杰，李晨，等. 细粒含量对岛礁吹填珊瑚礁砂最大动剪切模量影响的试验研究[J]. 岩石力学与工程学报，2022，41(1)：205-216.(WU Yang，CUI Jie，LI Chen，et al. Experimental study on the effect of fines on the maximum dynamic shear modulus of coral sand in a hydraulic fill island-reef[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(1)：205-216.(in Chinese))
[11]	DING X，ZHANG Y，WU Q，et al. Shaking table tests on the seismic responses of underground structures in coral sand[J]. Tunnelling and Underground Space Technology，2021，109(3)：103775.
[14]	中华人民共和国行业标准编写. DL/T 5102—2013 土工离心模型试验技术规程[S]. 北京：中国电力出版社，2014.(The Professional Standards Compilation Group of People?s Republic of China. DL/T 5102—2013 Specification for geotechnical centrifuge model test techniques[S]. Beijing：China Electrical Power Press，2014.(in Chinese))
[16]	袁晓铭，秦志光，刘荟达，等. 砾性土层液化的触发条件[J]. 岩土工程学报，2018，40(5)：777-785.(YUAN Xiaoming，QIN Zhiguang，LIU Huida，et al. Necessary trigger conditions of liquefaction for gravelly soil layers[J]. Chinese Journal of Geotechnical Engineering，2018，40(5)：777-785.(in Chinese))
[19]	王体强，王永志，陈苏，等. 基于加速度阵列反演循环剪应力-剪应变的积分位移方法影响[J]. 岩土工程学报，2022，44(1)：115-124.(WANG Tiqiang，WANG Yongzhi，CHEN Su，et al. Influence of double-integral-displacement methods on inverse analysis of accelerograph arrays for cyclic shear stress-strain response[J]. Chinese Journal of Geotechnical Engineering，2022，44(1)：115-124.(in Chinese))
[21]	王永志，王体强，袁晓铭，等. 动力离心试验反演分析砂土模量阻尼比特征与可靠性[J]. 岩石力学与工程学报，2022，41(8)：1 717-1 727.(WANG Yongzhi，WANG Tiqiang，YUAN Xiaoming，et al. Characteristics and reliability of sand shear modulus and damping ratio evaluated by inverse analysis in dynamic centrifuge tests[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(8)：1 717-1 727.(in Chinese))
[24]	PANDO M A，SANDOVAL E A，CATANO J. Liquefaction susceptibility and dynamic properties of calcareous sands from Cabo Rojo，Puerto Rico[C]// Proceedings of the 15th World Conference on Earthquake Engineering. Lisbon：[s. n.]，2012：30 501-30 510.
[25]	CARRARO J，BORTOLOTTO M. Stiffness degradation and damping of carbonate and silica sands[C]// Frontiers in Offshore Geotechnics III. Boca Raton：CRC Press，2015：1 179-1 183.
[27]	GIANG P H H，IMPE P V，IMPE W F V，et al. Effects of grain size distribution on the initial strain shear modulus of calcareous sand[C]// The 16th Geotechnical Engineering for Infrastructure and Development. [S. l.]：ICE Publishing，2015：3 177-3 182.
[29]	CATANO J，PANDO M A. Static and dynamic properties of a calcareous sand from southwest Puerto Rico[C]// GeoFlorida 2010：Advances in Analysis，Modeling and Design. Orlando：[s. n.]，2010：842-851.
[26]	SHARMA S S，ISMAIL M A. Monotonic and cyclic behavior of two calcareous soils of different origins[J]. Journal of Geotechnical and Geoenvironmental Engineering，2006，132(12)：1 581-1 591.