Abstract

LIU, Bin  and  JIANG, Xiugen. Consolidation and deformation characteristics of soft rock foundation in a hydrological wetland environment. Earth Sci. Res. J. [online]. 2020, vol.24, n.2, pp.183-190.  Epub Aug 31, 2020. ISSN 1794-6190.  https://doi.org/10.15446/esrj.v24n2.87920.

The widespread distribution of soft rock and soft soil in a hydrological wetland environment is a common geotechnical engineering problem encountered in coastal engineering construction. A study method for consolidation and deformation characteristics of soft rock and soft soil foundation in a hydrological wetland environment is proposed to solve this problem. The study area was limited to the K9+280-K11+120 section along the Fu-Nehe section of National Highway 111. The consolidation and deformation characteristics and loading conditions of soft soil foundation under embankment filling load, treatment methods of the soft rock foundation, stratum conditions, temperature changes, and time effects are analyzed. The results show that although the wetland soft rock and soil layer is not thick, the settlement of soft rock and soil accounts for more than 80% of the total settlement. The negative temperature has a certain influence on the consolidation settlement of soft rock foundation, which is mainly manifested in the difference between the settlement process of the central separation zone and the roadbed soft soil foundation. The pore water pressure of soft rock foundation dissipates to varying degrees. According to the monitoring results of settlement and pore water pressure, bagged sand wells are more suitable for soft rock foundation engineering treatment in a hydrological wetland. The research results can provide a reference for the study, calculation, and design of the consolidation and deformation of soft rock foundation in a hydrological wetland.

Keywords : Hydrological wetland; soft rock soil; foundation; consolidation; deformation characteristics; settlement.

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