地埋管线周围土体抗力系数的正交各向异性解析分析

doi:10.13722/j.cnki.jrme.2018.0985

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Abstract For the design and assessment of municipal and submarine pipelines，it is vital to solve the problems of the anisotropy and determination of the soil resistance coefficients around buried pipelines. Vertical and horizontal resistance coefficients were obtained by using transfer matrix method and analogy method，considering partial or complete embedment of the pipeline and change of the pipe-soil stiffness ratio，and axial resistance coefficient was solved by using shear displacement method and image method respectively corresponding to partially buried and completely buried cases. The rationality of the method for calculating the resistance coefficients was verified via numerical examples，and the differences in the values of the resistance coefficients caused by the change of parameters were analyzed for three typical foundation distribution forms. The results show that the resistance coefficients in three directions increase with increasing the buried depth-diameter ratio and tend to be stable with the buried depth-diameter ratio reaching 20，and that the vertical and horizontal resistance coefficients decrease with rising the pipe-soil stiffness ratio. In homogeneous semi-infinite soil，the axial resistance coefficient is less than the vertical resistance coefficient. The ratio of the horizontal resistance coefficient to the vertical resistance coefficient is less than 1 for the partially buried pipeline，but，for the completely buried pipeline，more than 1 and approaches 1 with a buried depth-diameter ratio of 20. The finite compression characteristic of soil under the pipeline has obvious influence on the vertical and horizontal resistance coefficients，and the influence on the former is more significance. The vertical and horizontal resistance coefficients obtained by simplified homogenization method are obviously different from the stratified solutions proposed in this paper. Corresponding to the cases of an upper-soft and lower-hard stratum and an upper-hard and lower-soft stratum，the simplified homogeneous values of the resistance coefficients are respectively bigger or smaller than the stratified solutions.

Key words： soil mechanics buried pipeline isotropic soil elastic resistance coefficients analytic solutions orthogonal anisotropy

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	Articles by authors
	WANG Yu1
	CHEN Wenhua1
	WANG Kaixuan2

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WANG Yu1,CHEN Wenhua1,WANG Kaixuan2. An analytical method for evaluating orthogonal anisotropy of soil resistance coefficients around buried pipelines[J]. , 2019, 38(3): 606-618.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.0985 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/I3/606

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