温度效应对珊瑚礁砂抗剪强度和颗粒破碎演化特性的影响研究#br#

doi:10.13722/j.cnki.jrme.2019.0170

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (908 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要我国南海广泛分布着珊瑚礁砂地基，在海底油气管道等众多高温基础工程的建设中需要掌握温度对珊瑚礁砂力学性质的影响。对取自南海的珊瑚礁砂进行不同温度下的固结排水三轴剪切试验，通过与石英砂试验进行对比，深入研究高温对于珊瑚礁砂抗剪强度特性的影响机制，并分析温度效应对颗粒破碎、内摩擦角、临界状态的影响。结果表明：温度效应对于珊瑚礁砂和石英砂力学行为的影响机制显著不同，升温使石英砂孔隙水排出，土颗粒有效接触增多，从而表现出更强的抗剪强度和剪胀性；升温虽然使珊瑚礁体积压密，但升温也会使珊瑚礁砂颗粒破碎和重排列程度增加，导致其抗剪强度和剪胀性降低；存在一个温度门槛值，当温度大于该门槛值，温度升高使得珊瑚礁砂颗粒破碎和抗剪强度降低量明显增大；随温度增大，珊瑚礁砂颗粒破碎指标Br增大，在p?-q平面的临界状态线略微向靠近p?轴的方向旋转；珊瑚礁砂的峰值和临界摩擦角与Br存在负相关函数关系。

	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
	何绍衡1
	夏唐代1
	李玲玲1
	丁智2
	单华峰3

关键词 ：岩石力学, 珊瑚礁砂, 颗粒破碎, 温度效应, 抗剪强度特性, 临界状态

Abstract：In the construction of many high-temperature infrastructure projects such as submarine oil and gas pipelines in South China Sea，it is necessary to master the effect of temperature on the mechanical properties of coral reef sand on which these projects are seated. The drained triaxial shear tests of coral reef sand from South China Sea were carried out under different temperatures，and the effects of high temperature on shear strength，particle breakage，friction angle and critical state of coral reef sand were studied in depth by comparing with the test results of quartz sand. It is shown that the effects of temperature on the mechanical behaviors of quartz sand and coral reef sand are quite different. Increasing temperature causes pore water discharge of quartz sand，increases the effective contact of soil particles and consequently increases the shear strength and dilatancy of quartz sand. However，increasing temperature results in a significant decrease in both shear strength and dilatancy due to particle breakage and rearrangement of coral reef sand. There exists a temperature threshold value. When the temperature is higher than the threshold value，increasing temperature causes the coral reef sand particles to break and the shear strength to decrease significantly. With increasing the temperature，the relative particle breakage index of coral reef sand increases，and the critical state line in the p?-q plane rotates towards p?-axis. The peak and critical friction angles of coral reef sand have a corresponding negative correlation function relationship with the relative particle breakage index of coral reef sand.

Key words： rock mechanics coral reef sand particle breakage temperature effect shear strength characteristics critical state

引用本文:

何绍衡1，夏唐代1，李玲玲1，丁智2，单华峰3. 温度效应对珊瑚礁砂抗剪强度和颗粒破碎演化特性的影响研究#br#[J]. 岩石力学与工程学报, 2019, 38(12): 2535-2549.
HE Shaoheng1，XIA Tangdai1，LI Lingling1，DING Zhi2，SHAN Huafeng3. Influence of temperature effect on shear strength and particle breaking evolution characteristics of coral reef sand. , 2019, 38(12): 2535-2549.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2019.0170 或 http://www.rockmech.org/CN/Y2019/V38/I12/2535

[27]	COOP M R. The mechanics of uncemmented carbonate sands[J]. Géotechnique. 1990，40(4)：607-626.
[6]	LALOUI L. Thermo-mechanical behaviour of soils[J]. French Revue of Civil Engineering，2001，5(6)：809-843.
[2]	LIU H，LIU H，XIAO Y，et al. Effects of temperature on the shear strength of saturated sand[J]. Soils and Foundations，2018，58(6)：1 326-1 338.
[4]	ABUEL-NAGA H M，BERGADO D T，BOUAZZA A，et al. Thermomechanical model for saturated clays[J]. Géotechnique，2009，59(3)：273-278.
[7]	CEKEREVAC C，LALOUI L. Experimental study of thermal effects on themechanical behaviour of a clay[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2004，28(3)：209-228.
[9]	ABUEL-NAGA H M，BERGADO D T，RAMANA G V，et al. Experimental evaluation of engineering behavior of soft Bangkok clay under elevated temperature[J]. Journal of Geotechnical and Geoenvironmental Engineering，2006，132(7)：902-910.
[5]	GRAHAM J，TANAKA N，CRILLY T，et al. Modified Cam-Clay modelling of temperature effects in clays[J]. Canadian Geotechnical Journal，2001，38(3)：608-621.
[12]	高彦芳，陈勉，林伯韬，等. 温度对油砂力学性质的影响规律研究[J]. 岩石力学与工程学报，2018，37(11)：2 520-2 535.(GAO Yanfang，CHEN Mian，LIN Botao，et al. Thermal influences on mechanical properties of oil sands[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(11)：2 520-2 535.(in Chinese))
[14]	YU F W. Particle breakage and the undrained shear behavior of sands[J]. International Journal of Geomechanics，2018，18(7)：1-10.
[15]	张家铭，钙质砂基本力学性质及颗粒破碎影响研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2004.(ZHANG Jiaming. Study on the fundamental mechanical characteristics of calcareous sand and the influence of particle breakage[Ph. D. Thesis][D]. Wuhan：Institute of Rock Mechanics and Soil Mechanics，Chinese Academy of Sciences，2004.(in Chinese))
[17]	罗岚，夏唐代，仇浩淼. K0条件下颗粒形状特征对砂土剪切模量的影响[J]. 岩土力学，2018，39(10)：197-204.(LUO Lan，XIA Tangdai，QIU Haomiao. Effect of particle shape on shear modulus of sand in K0 condition[J]. Rock and Soil Mechanics，2018，39(10)：197-204.(in Chinese))
[19]	何绍衡，郑晴晴，夏唐代，等. 考虑时间间歇效应的地铁列车荷载下海相软土长期动力特性试验研究[J]. 岩石力学与工程学报，2019，38(2)：353-364.(HE Shaoheng，ZHENG Qingqing，XIA Tangdai，et al. Experimental study on long-term dynamic characteristics of marine soft soils under metro train loads considering time intermittent effect[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(2)：353-364.(in Chinese))
[22]	陈晶华，付璇. 海底原油管道停输温降的Fluent模拟[J]. 石油化工高等学校学报，2014，27(2)：93-96.(CHEN Jinghua，FU Xuan. Numerical simulation of the temperature drop in submarine oil pipeline during shutdown based on fluent[J]. Journal of Petrochemical Universities，2014，27(2)：93-96.(in Chinese))
[24]	BALDI G，HUECKEL T，PELLEGRINI R . Thermal volume changes of the mineral-water system in low-porosity clay soils[J]. Canadian Geotechnical Journal，1988，25(4)：807-825.
[30]	SADREKARIMI A，OLSON S M. Critical state friction angle of sands[J]. Géotechnique，2011，61(9)：771-783.
[25]	HARDIN B O. Crushing of soil particles[J]. Journal of Geotechnical Engineering，1985，111(10)：1 177-1 192.
[29]	刘萌成，高玉峰，刘汉龙. 模拟堆石料颗粒破碎对强度变形的影响[J]. 岩土工程学报，2011，33(11)：1 691-1 699.(LIU Mengcheng，GAO Yufeng，LIU Hanlong. Effect of particle breakage on strength and deformation of modeled rockfills[J]. Chinese Journal of Geotechnical Engineering，2011，33(11)：1 691-1 699.(in Chinese))
[3]	CAMPANELLA R G，MITCHELL J K. Influence of temperature variations on soil behaviour[J]. Journal of the Soil Mechanics and Foundation Division，1968，94(3)：709-734.
[13]	KOSAR K M. Geotechnical properties of oil sands and related strata[Ph. D. Thesis][D]. Alberta：University of Alberta，1989.
[23]	CEKEREVAC C，LALOUI L，VULLIET L. A novel triaxial apparatus for thermo-mechanical testing of soils[J]. Geotechnical Testing Journal，2005，28(2)：161-170.
[1]	王刚，叶沁果，查京京. 珊瑚礁砂砾料力学行为与颗粒破碎的试验研究[J]. 岩土工程学报，2018，40(5)：802-810.(WANG Gang，YE Qinguo，ZHA Jingjing. Experimental study on mechanical behavior and particle crushing of coral sand-gravel fill[J]. Chinese Journal of Geotechnical Engineering，2018，40(5)：802-810.(in Chinese))
[8]	BRUYN D D，THIMUS J F. The influence of temperature on mechanical characteristics of Boom clay-the results of an initial laboratory program[J]. Engineering Geology，1996，41：117-126.
[10]	KUNTIWATTANAKUL P，TOWHATA I，OHISHI K，et al. Temperature effects on undrained shear characteristics of clay[J]. Soils and Foundations，1995，35(1)：147-162.
[11]	NG C W W，WANG S H，ZHOU C. Volume change behaviour of saturated sand under thermal cycles[J]. Géotechnique Letters，2016，6(2)：124-131.
[18]	张家铭，张凌，蒋国盛，等. 剪切作用下钙质砂颗粒破碎试验研究[J]. 岩土力学，2008，29(10)：2 789-2 793.(ZHANG Jiaming，ZHANG Lin，JIANG Guosheng，et al. Research on particle crushing of calcareous sands under triaxial shear[J]. Rock and Soil Mechanics，2008，29(10)：2 789-2 793.(in Chinese))
[20]	王新志，谌民，魏厚振，等. 车辆荷载作用下钙质砂路基的动态响应试验研究[J]. 岩土力学，2018，39(11)：185-193.(WANG Xinzhi，CHEN Min，WEI Houzhen，et al. Experimental study on dynamic response of calcareous sand subgrade under vehicle load[J]. Rock and Soil Mechanics，2018，39(11)：185-193.(in Chinese))
[21]	CAI Y，HAO B，GU C，et al. Effect of anisotropic consolidation stress paths on the undrained shear behavior of reconstituted Wenzhou clay[J]. Engineering Geology，2018，242：23-33.
[28]	郭熙灵，胡辉，包承纲. 堆石料颗粒破碎对剪胀性及抗剪强度的影响[J]. 岩土工程学报，1997，19(3)：83-88.(GUO Xiling，HU Hui，BAO Chenggang. Experimental studies of the effects of grain breakage on the dilatancy and shear strength of rock fill[J]. Chinese Journal of Geotechnical Engineering，1997，19(3)：83-88.(in Chinese))
[16]	汪轶群，洪义，国振，等. 南海钙质砂宏细观破碎力学特性[J]. 岩土力学，2018，39(1)：199-206.(WANG Yiqun，HONG Yi，GUO Zhen，et al. Micro-and macro-mechanical behavior of crushable calcareous sand in South China Sea[J]. Rock and Soil Mechanics，2018，39(1)：199-206.(in Chinese))
[26]	吴京平，褚瑶，楼志刚. 颗粒破碎对钙质砂变形及强度特性的影响[J]. 岩土工程学报，1997，19(5)：51-57.(WU Jingping，CHU Yao，LOU Zhigang. Influence of particle breakage on deformation and strength properties of calcareous sands[J]. Chinese Journal of Geotechnical Engineering，1997，19(5)：51-57.(in Chinese))