越江地铁荷载作用下软黏土孔压试验研究

doi:10.13722/j.cnki.jrme.2019.0976

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1634 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要杭州湾区域越江地铁往往穿越江底深厚软土层，同时上覆冲淤以及水位的变化会对地铁变形造成不利的影响，从而对地铁安全运营造成隐患。基于双向动三轴试验，首次模拟了越江地铁循环荷载对软黏土地基的作用，得到软黏土孔压发展曲线，并建立越江地铁作用下软黏土的孔压模型。研究结果表明：越江地铁循环荷载作用下，软黏土的孔压发展呈现出“急剧上升→增速减缓→趋于稳定”的变化规律；增大循环加载过程中的有效围压，孔隙水压力会上升；增大径向循环应力比孔隙水压力的稳定值会随之增大；采用二次对数模型能够较好地模拟越江地铁荷载作用下软黏土的孔压发展，且综合考虑了越江地铁荷载径向循环应力比和有效围压的影响，能够为越江地铁工后沉降的控制及预测提供相应的参考。

	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
	丁智1
	庄家煌2
	魏新江1
	孔勃文3
	马少俊4

关键词 ：土力学, 越江地铁, 循环荷载, 孔压, 围压, 径向循环应力比

Abstract：Many cross-river subways are often constructed in deep soft soil layers，and the frequent changes of the warp soil above and the water level is a disadvantage to the control of the post-construction settlement. Therefore，the safety of cross-river subway is a challenge to control the post-construction settlement. Therefore，the safety of cross-river subway is undermined when it starts running. In this paper，the bidirectional dynamic triaxial test was operated by trial and error to stimulate the loading of cross-river subway on soft clay sample. The changing curve of pore pressure through dynamic test could be plotted，and a pore pressure model of soft clay under cross-river subway loading can be built. The study shows that：Under cross-river subway loading，the growing of pore pressure is firstly rapid，then slows down and stable. Increasing the effective confining pressure during cyclic loading make the pore water pressure rise，the stability value of pore water pressure will increase with the increase of radial cyclic stress ratio. The quadratic logarithmic model can be used to simulate the pore pressure development of soft clay under cyclic loading. The model takes the effects of radial cyclic stress ratio and effective confining pressure into consideration，which can provide as a reference for post-construction settlement prediction of cross-river subway.

Key words： soil mechanics cross-river subway cyclic loading pore pressure effective confining pressure radial cyclic stress ratio

引用本文:

丁智1，庄家煌2，魏新江1，孔勃文3，马少俊4. 越江地铁荷载作用下软黏土孔压试验研究[J]. 岩石力学与工程学报, 2020, 39(S1): 3178-3187.
DING Zhi1，ZHUANG Jiahuang2，WEI Xinjiang1，KONG Bowen3，MA Shaojun4. Experimental study of pore pressure model of soft clay under cross-river subway loading. , 2020, 39(S1): 3178-3187.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0976 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/IS1/3178

[28]	蔡袁强，于玉贞，袁晓铭，等.土动力学与岩土地震工程[J].土木工程学报，2016，49(5)：9–30.(CAI Yuanqinag，YU Yuzhen，YUAN Xiaoming，et al. Soil dynamics and geotechnical earthquake engineering[J]. China Civil Engineering Journal，2016，49(5)：9–30.(in Chinese))
[21]	叶俊能，陈斌. 海相沉积软土动强度与孔压特性试验研究[J]. 岩土力学，2011，32(增1)：55–60.(YE Junneng，CHEN Bin. Dynamic strength and pore pressure property of marine deposit soft clay[J]. Rock and Soil Mechanics，2011，32(Supp.1)：55–60.(in Chinese))
[6]	VUCETIC M. Soil properties and seismic response[C]// Proceedings of the 10th World Conference on Earthquake Engineering. Madrid，Spain：[s.n.]，1992：1 199–1 204.
[20]	ATILLA M A，AYFER E. Undrained behavior of clay under cyclic shear stresses[J]. Journal of Geotechnical and Engineering，1989，115：968–983.
[2]	吴世明，王湛，王立忠. 大断面过江隧道运营期受力变形健康监测分析[J]. 浙江大学学报：工学版，2013，47(4)：595–601.(WU Shiming，WANG Zhan，WANG Lizhong. Monitoring and analysis of force and deformation of large-section crossing-river tunnel during operation period[J]. Journal of Zhejiang University：Engineering Science，2013，47(4)：595–601.(in Chinese))
[4]	刘明，黄茂松，李进军. 地铁荷载作用下饱和软粘土的长期沉降分析[J]. 地下空间与工程学报，2006，25(5)：813–817.(LIU Ming，HUANG Maosong，LI Jinjun. Long-term settlement of saturated soft clay under subway loading[J]. Chinese Journal of Underground Space and Engineering，2006，25(5)：813–817.(in Chinese))
[7]	VUCETIC M. Cyclic threshold shear strains in soil[J]. Journal of Geotechnical Engineering，1994，120(12)：2 208–2 228.
[9]	王元东，唐益群，廖少明，等. 地铁行车荷载下隧道周围加固软粘土孔压特性试验[J]. 吉林大学学报：地球科学版，2011，41(1)：188–194.(WANG Yuandong，TANG Yiqun，LIAO Shaoming，et al. Experimental of pore pressure of reinforced soft clay around tunnel under subway vibrational loading[J]. Journal of Jilin University：Earth Science，2011，41(1)：188–194.(in Chinese))
[12]	郭林，蔡袁强，王军. 长期循环荷载作用下排水条件对饱和软黏土动力特性影响[J]. 岩土力学，2013，34(增2)：94–99.(GUO Lin CAI Yuanqiang，WANG Jun. Influence of drainage condition on dynamic cyclic behavior of saturated soft clay under long-term cyclic loading[J]. Rock and Soil Mechanics，2013，34(Supp.2)：94–99.(in Chinese))
[1]	葛国宝. 考虑施工影响下地铁运营引起的地基土动特性及沉降研究[硕士学位论文][D]. 杭州：浙江大学，2013.(GE Guobao. Research on dynamic characteristics under the condition of shield tunnel construction and subway operation[M. S. Thesis][D]. Hangzhou：Zhejiang University，2013.(in Chinese))
[5]	AZZOUZ A S，MALEK A M，BALIGH M M. Cyclic behavior of clays in undrained simple shear[J]. Journal of Geotechnical Engineering，1989，115(5)：637–657.
[14]	魏新江，张涛，丁智，等. 地铁荷载下不同固结度软黏土的孔压试验模型[J]. 岩土力学，2014，35(10)：2 761–2 768.(WEI Xinjiang，ZHANG Tao，DING Zhi，et al. Experimental study of pore pressure model of soft clay with different consolidation degrees under subway loading[J]. Rock and Soil Mechanics，2014，35(10)：2 761–2 768.(in Chinese))
[15]	周建，龚晓南，李剑强. 循环荷载作用下饱和软粘土特性试验研究[J]. 工业建筑，2000，30(11)：43–47.(ZHOU Jian，GONG Xiaonan，LI Jianqiang. Experimental study of saturated soft clay under cyclic loading[J]. Industrial Construction，2000，30(11)：43–47.(in Chinese))
[17]	张茹，涂扬举，费文平，等. 振动频率对饱和黏性土动力特性的影响[J]. 岩土力学，2006，27(5)：699–704.(ZHANG Ru，TU Yangju，FEI Wenping，et al. Effect of vibration frequency on dynamic properties of saturated cohesive soil[J]. Rock and Soil Mechanics，2006，27(5)：699–704.(in Chinese))
[19]	YASUHARA K，YAMANOUCHI T，HIRAO K. Cyclic strength and deformation of normally consolidated clay[J]. Soils and Foundations，1982，22(3)：77–79.
[22]	中华人民共和国行业标准. SL 237—1999土工试验规程[S]. 北京：中国水利水电出版社，1999.(The Professional Standard of the People's Republic of China. SL 237—1999 Specification of soil test[S]. Beijing：China Water Power Press，1999.(in Chinese))
[24]	ZHENG Q，XIA T，DING Z，et al. The effect of periodic intermittency on the cyclic behavior of marine sedimentary clay[J]. Marine Georesources and Geotechnology，2018，37(8)：945–959.
[25]	丁智，张孟雅，魏新江，等. 地铁循环荷载下冻融软土孔压发展及微观结构研究[J]. 岩石力学与工程学报，2016，35(11)：2 328–2 336.(DING Zhi，ZHANG Mengya，WEI Xinjiang，et al. Study on pore pressure and microstructure of frozen and thawed soft soil under subway cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 328–2 336.(in Chinese))
[27]	CAI Y，GU C，WANG J，et al. One-way cyclic triaxial behavior of saturated clay：comparison between constant and variable con?ning pressure[J]. Journal of Geotechnical and Geoenvironmental Engineering，2013，139(5)：797–809.
[29]	王常晶，陈云敏. 双向循环荷载下饱和软黏土变形特性的试验研究[J]. 土木工程学报，2010，43(增1)：573–576.(WANG Changjing，CHEN Yunmin. Experimental study on deformation behavior of saturated soft clay under bidirectional cyclic loading[J]. China Civil Engineering Journal，2010，43(Supp.1)：573–576.(in Chinese))
[32]	黄茂松，李进军，李兴照. 饱和软粘土的不排水循环累积变形特性[J]. 岩土工程学报，2006，28(7)：891–895.(HUANG Maosong，LI Jinjun，LI Xingzhao. Cumulative deformation behaviour of soft clay in cyclic undrained tests[J]. Chinese Journal of Geotechnical Engineering，2006，28(7)：891–895.(in Chinese))
[34]	CAI Y Q，GU C，WANG J，et al. One-way cyclic triaxial behavior of saturated clay：comparison between constant and variable confining pressure[J]. Journal of Geotechnical and Geoenvironmental Engineering，2013，139(5)：797–809.
[3]	张孟雅. 地铁循环荷载下冻融软土动力特性与微观结构试验研究[硕士学位论文][D]. 杭州：浙江大学，2016.(ZHANG Mengya. Experimental study on dynamic characteristics and microstructure of frozen-thawed soil under subway loading[M. S. Thesis][D]. Hangzhou：Zhejiang University，2016.(in Chinese))
[35]	沈林冲，钟小春，秦建设，等. 钱塘江盾构越江隧道最小覆土厚度的确定[J]. 岩土力学，2011，32(1)：111–115.(SHEN Linchong，ZHONG Xiaochun，QIN Jianshe，et al. Determination of minimum thickness of overburden layer for shield tunnel through Qiantang River[J]. Rock and Soil Mechanics，2011，32(1)：111–115.(in Chinese))
[8]	MATASOVI N，VUCETIC M. Generalized cyclic-degradation- pore-pressure generation model for clays[J]. Journal of Geotechnical Engineering，1995，121(1)：33–42.
[10]	周建. 循环荷载作用下饱和软黏土特性研究[博士学位论文][D]. 杭州：浙江大学，1998.(ZHOU Jian. Properties of saturated clay under cyclic loading[Ph. D. Thesis][D]. Hangzhou：Zhjiang University，1998.(in Chinese))
[11]	丁智，张涛，魏新江，等. 排水条件对不同固结度软黏土动力特性影响试验研究[J]. 岩土工程学报，2015，37(5)：893–899. (DING Zhi，ZHANG Tao，WEI Xinjiang，et al. Experimental study on effect of different drainage conditions on dynamic characteristics of soft clay under different degrees of consolidation[J]. Chinese Journal of Geotechnical Engineering，2015，37(5)：893–899.(in Chinese))
[13]	蒋敏敏，蔡正银，曹培，等. 循环荷载对粉质黏土力学性质的影响[J]. 岩土力学，2009，30(增2)：204–207.(JIANG Minmin，CAI Zhengyin，CAO Pei，et al. Effects of cyclic loading on mechanical properties of slity clay[J]. Rock and Soil Mechanics，2009，30(Supp.2)：204–207.(in Chinese))
[16]	张涛. 地铁列车荷载下不同固结度重塑粘土动力特性试验研究[硕士学位论文][D]. 杭州：浙江大学，2014.(ZHANG Tao. Experimental study on dynamic characteristics of remolded clay with different consolidation degree under subway loading[M. S. Thesis][D]. Hangzhou：Zhejiang University，2014.(in Chinese))
[18]	郑刚，雷海峰，雷华阳，等. 振动频率对饱和黏土动力特性的影响[J]. 天津大学学报：自然科学与工程技术版，2013，46(1)：38–43.(ZHENG Gang，LEI Haifeng，LEI Huayang，et al. Contrastive study on dynamics characteristics of saturated clay in different vibration frequencies[J]. Journal of Tianjin University：Science and Technology，2013，46(1)：38–43.(in Chinese))
[23]	田慧会，韦昌富，魏厚振，等. 压实黏质砂土脱湿过程影响机制的核磁共振分析[J]. 岩土力学，2014，35(8)：2 129–2 136.(TIAN Huihui，WEI Changfu，WEI Houzhen，et al. A NMR-based analysis of drying processes of compacted clayey sands[J]. Rock and Soil Mechanics，2014，35(8)：2 129–2 136.(in Chinese))
[26]	丁智，魏新江，庄家煌，等. 地铁列车荷载下冻融土刚度软化试验研究[J]. 岩石力学与工程学报，2018，37(4)：987–995.(DING Zhi，WEI Xinjiang，ZHUANG Jiahuang，et al. Experimental study on stiffness softening of frozen-thawed soil under subway loading[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(4)：987–995.(in Chinese))
[30]	林存刚. 盾构掘进地面隆陷及潮汐作用江底盾构隧道性状研究[博士学位论文][D]. 杭州：浙江大学，2014.(LIN Cungang. Research on shield tunneling-induced ground surface heave and subsidence behavior of under water shield-driven tunnels subject to tidal bores[Ph. D. Thesis][D]. Hangzhou：Zhejiang University，2014.(in Chinese))
[31]	MONISMITH C L，OGAWA N，FREEME C R. Permanent deformation characteristics of subgrade soils due to repeated loading[J]. Transportation Research Record Journal of the Transportation Research Board，1975，537：1–17.
[33]	孙磊，王军，孙宏磊，等. 循环围压对超固结黏土变形特性影响试验研究[J]. 岩石力学与工程学报，2015，34(3)：1–7.(SUN Lei，WANG Jun，SUN Honglei，et al. Influence of cyclic confining pressure on cumulative deformation behavior of over consolidated clay[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(3)：1–7.(in Chinese))
[36]	唐益群，张曦，赵书凯，等. 地铁振动荷载下隧道周围饱和软黏土的孔压发展模型[J]. 土木工程学报，2007，40(4)：82–86.(TANG Yiqun，ZHANG Xi，ZHAO Shukai，et al. Model of pore water pressure development in saturated soft clay around a subway tunnel under vibration load[J]. China Civil Engineering Journal，2007，40(4)：82–86.(in Chinese))