Parameters Acquisition and Applicability of HSS Model for Typical Silty Clay in Passing under the Yellow River Jiluo Road Tunnel, Jinan City

Zhou YANG , Wen-hao SUN , Liang-liang ZHANG , Ya-nan LI , Jin-yang FU , Qian-hui SUN

Science Technology and Engineering ›› 2024, Vol. 24 ›› Issue (17) : 7260 -7268.

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Science Technology and Engineering ›› 2024, Vol. 24 ›› Issue (17) : 7260-7268 DOI: 10.12404/j.issn.1671-1815.2304979
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Parameters Acquisition and Applicability of HSS Model for Typical Silty Clay in Passing under the Yellow River Jiluo Road Tunnel, Jinan City
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Abstract

The soil is in a small strain state in most areas during the shield construction process, which is different from the soil properties of the commonly used intrinsic model. Therefore, in order to study the static-dynamic behaviour and engineering applicability of typical silty clay in the area of Jinan Jinluo Road Tunnel passing under Yellow River, the basic physical property parameters of silty clay and tangential stiffness , natural stiffness , unloading/reloading reference stiffness were determined by laboratory soil tests, confined consolidation tests, standard triaxial consolidation tests, and dynamic triaxial tests. Then the obtained parameters were applied in the settlement analysis of the north bank embankment under the tunnel project of Jinan Tunnel through Yellow River. The obtained parameters were applied to the settlement analysis of the Jinan Jinluo Road Tunnel Project passing under the north bank embankment, and the accuracy of the HSS principal model in the deformation analysis of the area was verified by comparing the simulation results of the hardening soil model with small strain stiffness (HSS) model and the Mohr-Coulomb (M-C) model with the field measurement results. The results show that when the perimeter pressure is certain, the vertical strain of the silty clay specimens in this area is dominated by plastic strain, and with the increase of dynamic stress, the longer time is needed for the soil to reach the stability. When the cyclic load is certain, increasing the perimeter pressure of the soil could improve the stability of the soil. The deformation of the ground layer of the Jinan Jinluo Road Tunnel through the Yellow River Tunnel Project passing under the embankment, which is simulated based on the parameters of the HSS model obtained from laboratory experiments, is in good agreement with the measured values in the field. The research results could enrich the study of the stratigraphic parameters of silty clay in Jinan Yellow River area, and provide reference for the selection of the soil model and stratigraphic parameters for the numerical simulation and analysis of geotechnical engineering in this area.

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Zhou YANG, Wen-hao SUN, Liang-liang ZHANG, Ya-nan LI, Jin-yang FU, Qian-hui SUN. Parameters Acquisition and Applicability of HSS Model for Typical Silty Clay in Passing under the Yellow River Jiluo Road Tunnel, Jinan City. Science Technology and Engineering, 2024, 24(17): 7260-7268 DOI:10.12404/j.issn.1671-1815.2304979

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