基于光纤监测的埋地管线沉降模型试验研究

doi:10.13722/j.cnki.jrme.2020.0507

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Abstract Based on distributed fiber optic sensing technology，this paper proposes a refined scheme for the deformation and stress monitoring of buried pipelines. The spatial and temporal distribution characteristics of axial forces，shear forces and bending moments of buried pipelines，evolution of earth pressure and shear stress on the soil-pipe interface were experimentally studied. In this paper，a simplified model for calculating pipeline settlements based on the strain measurements of optical fibers was established. An ellipticity function was introduced to quantitatively evaluate the circumferential deformation of pipeline cross sections. The results show that：(1) The spatial distribution of the settlement of the pipeline conforms to the modified Gaussian curve. Maximum errors in settlement calculation based on the quadratic integration method and the conjugate beam method are 13.1% and 4.2%，respectively. (2) The maximum deformation along circumferential direction of the pipeline occurs in its middle. Compared with bending deformation，the magnitude of circumferential deformation is relatively low，with a maximum ovality value of 1%. (3) When settlement occurs，earth pressures at the pipe bottom dissipates rapidly. Whereas，earth pressures at crown first increase rapidly and then gradually stabilize. Earth pressures on pipe sides continue to increase during settling. (4) The shear stress distribution curve on the soil-pipe interface is center-symmetric. The pipe-soil interaction is classified into two classes：strong-shearing type and weak-shearing type based on the characteristics of the shear stress.

Key words： soil mechanics land subsidence buried pipeline distributed fiber optic sensing bending deformation soil arching effect interfacial shear stress

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	LI Haojie
	ZHU Honghu
	ZHU Bao
	WU Haiying
	LIU Zhengyuan
	SHI bin

Cite this article:

LI Haojie,ZHU Honghu,ZHU Bao, et al. Model tests on settlement of buried pipeline based on fiber optic monitoring[J]. , 2020, 39(S2): 3645-3654.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0507 OR https://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS2/3645

[1] PECK R B. Deep excavations and tunneling in soft ground[C]// Proceedings of the 7th International Conference of SMFE. Mexico：Mexico City，1969：225–90. [2] ATTEWELL P B，YEATES J，SELBY A R. Soil movements induced by tunnelling and their effects on pipelines and structures[M]. London：Blackie and Son Ltd.，1986：65. [3] VORSTER T，KLAR A，SOGA K，et al. Estimating the effects of tunneling on existing pipelines[J]. Journal of Geotechnical and Geoenvironmental Engineering，2005，131(11)：1 399–1 410. [4] KLAR A，VORSTER T，SOGA K，et al. Soil-pipe interaction due to tunnelling：comparison between Winkler and elastic continuum solutions[J]. Geotechnique，2005，55(6)：461–466. [5] 杜金龙，杨敏. 深基坑开挖对邻近地埋管线影响分析 [J]. 岩石力学与工程学报，2009，28(增1)：3 015–3 020.(DU Jinlong，YANG Min. Analysis of influence of deep foundation pit excavation on adjacent buried pipelines[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：3 015–3 020.(in Chinese)) [6] 张陈蓉，卢恺，黄茂松. 工程堆载对市政管线纵向响应的影响分析[J]. 岩石力学与工程学报，2015，34(增1)：3 055–3 061.(ZHANG Chenrong，LU Kai，HUANG Maosong. Analysis of the effect of engineering stacking on the longitudinal response of municipal pipelines[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3 055–3 061.(in Chinese)) [7] HOLZER T L，JOHNSON A I. Land subsidence caused by ground water withdrawal in urban areas[J]. GeoJournal，1985，11(3)：245–255. [8] PHIEN W N，GIAO P，NUTALAYA P. Land subsidence in bangkok，Thailand[J]. Engineering geology，2006，82(4)：187–201. [9] MULESKI G，ARIMAN T，AUMEN C. A shell model of a buried pipe in a seismic environment[J]. Journal of Pressure Vessel Technology，1979，101(1)：44. [10] MAIR R J，SOGA K，KLAR A，et al. Soil-pipe interaction due to tunnelling：comparison between Winkler and elastic continuum solutions[J]. Géotechnique，2005，55(6)：461–466. [11] 周敏，杜延军，王非，等. 地层沉陷中埋地HDPE管道力学状态及模型试验分析[J]. 岩土工程学报，2016，38(2)：253–262.(ZHOU Min，DU Yanjun，WANG Fei，et al. Mechanical state and model test analysis of HDPE pipeline buried in ground subsidence[J]. Chinese Journal of Geotechnical Engineering，2016，38(2)：253–262.(in Chinese)) [12] 周敏，杜延军，张亚军，等. 埋地HDPE管道施工过程中土拱效应变化特征研究[J]. 岩石力学与工程学报，2015，34(2)：414–424.(ZHOU Min，DU Yanjun，ZHANG Yajun，et al. Variation of soil arching effect during burying process of HDPE pipes[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(2)：414–424.(in Chinese)) [13] 刘全林，杨敏. 地埋管与土相互作用分析模型及其参数确定[J].岩土力学，2004，25(5)：728–731.(LIU Quanlin，YANG Min. Analytical model of interaction between buried pipe and soil and its parameter determination[J] .Rock and Soil Mechanics，2004，25(5)：728–731.(in Chinese)) [14] 王正兴，缪林昌，王冉冉，等. 砂土隧道施工对下卧管线影响的试验和数值模拟分析[J]. 岩土工程学报，2014，36(1)：182–188.(WANG Zhengxing，MIAO Linchang，WANG Ranran，et al. Experimental and numerical simulation analysis of the influence of sand tunnel construction on underlying pipelines[J]. Chinese Journal of Geotechnical Engineering，2014，36(1)：182–188.(in Chinese)) [15] 施斌，张丹，朱鸿鹄. 地质与岩土工程分布式光纤监测技术[M]. 北京：科学出版社，2019：5–11.(SHI Bin，ZHANG Dan，ZHU Honghu. Distributed fiber optic sensing for geoengineering monitoring[M]. Beijing：Science Press，2019：5–11.(in Chinese)) [16] 赵星光，邱海涛. 光纤Bragg光栅传感技术在隧道监测中的应用[J]. 岩石力学与工程学报，2007，26(3)：587–593.(ZHAO Xingguang，QIU Haitao. Application of fiber bragg grating sensing technology in tunnel monitoring[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(3)：587–593.(in Chinese)) [17] ZHU H H，SHI B，ZHANG J，et al. Distributed fiber optic monitoring and stability analysis of a model slope under surcharge loading[J]. Journal of Mountain Science，2014，11(4)：979–989. [18] SUN Y J，ZHANG D，SHI B，et al. Distributed acquisition，characterization and process analysis of multi-field information in slope[J]. Engineering Geology，2014，182：49–62. [19] 吴海颖，朱鸿鹄，朱宝，等. 基于分布式光纤传感的地下管线监测研究综述[J]. 浙江大学学报：工学版，2019，53(6)：1 057–1 070. (WU Haiying，ZHU Honghu，ZHU Bao，et al. Review of underground pipeline monitoring research based on distributed fiber optic sensing[J]. Journal of Zhejiang University：Engineering Science，2019，53(6)： 1 057–1 070. (in Chinese)) [20] 孙梦雅，施斌，段新春，等. 基于FBG的管道渗漏监测可行性及其影响因素试验研究[J]. 防灾减灾工程学报，2019，39(5)：715–723.(SUN Mengya，SHI Bin，DUAN Xinchun，et al. Experimental study on the feasibility and influencing factors of pipeline leakage monitoring based on FBG[J]. Journal of Disaster Prevention and Mitigation Engineering，2019，39(5)：715–723. (in Chinese)) [21] 朱鸿鹄，王德洋，王宝军，等. 基于光纤传感及数字图像测试的管—土相互作用试验研究[J]. 工程地质学报，2020.(待刊)(ZHU Hhonghu，WANG Deyang，WANG Baojun，et al. Experimental study on pipe-soil interaction based on fiber optic sensing and digital image analysis[J]. Journal of Engineering Geology，2020(to be Pressed).(in Chinese)) [22] YUAN W，STEFANI A，BANG O. Tunable polymer fiber Bragg grating(FBG) inscription：fabrication of dual-FBG temperature compensated polymer optical fiber strain sensors[J]. IEEE Photonics Technology Letters，2011，24(5)：401–403. [23] 沈圣，吴智深，杨才千，等. 基于改进共轭梁法的盾构隧道纵向沉降分布监测策略[J]. 土木工程学报，2013，46(11)：112–121.(SHEN Sheng，WU Zhishen，YANG Caiqian，et al. Monitoring strategy for longitudinal settlement distribution of shield tunnels based on improved conjugate beam method[J]. Journal of Civil Engineering，2013，46(11)：112–121.(in Chinese)) [24] 朱鸿鹄，殷建华，靳伟，等. 基于光纤光栅传感技术的地基基础健康监测研究[J]. 土木工程学报，2010，43(6)：109–115.(ZHU Honghu，YIN Jianhua，JIN Wei，et al. Health monitoring of foundations using fiber Bragg grating sensing technology[J]. China Civil Engineering Journal，2010，43(6)：109–115.(in Chinese)) [25] MOHAMAD H，SOGA K，BENNETT P J，et al. Monitoring twin tunnel interaction using distributed optical fiber strain measurements [J]. Journal of Geotechnical and Geoenvironmental Engineering，2012，138(8)：957–996.