Study on Soil Improvement of TBM’S Commencement and Arrival in Water-Rich Sand Stratum
In order to keep the safety construction during TBM’S commencement and arrival more and avoid surface settlement and failure accidents happening at the joint areas of TBM’S commencement and arrival, according to mechanical properties and deformation modes of water-rich sand stratum, mechanical and mathematical models are established, and theoretical equations of longitudinal improvement scope based on strength and stability theory are deduced. At the same time, according to geometric structure of TBM and permeability requirement of improved stratum, geometric criterions are proposed. By monitoring and analyzing the whole process of stratum improvement at the joint areas of TBM’S commencement and arrival in line 2 lot 2202 of Shenzhen Metro, longitudinal improvement theory and stratum adaptability of various improvement methods are verified, it provides a reliable theoretical basis for stratum improvement in water-rich sand stratum.
H. Jiang et al., "Study on Soil Improvement of TBM’S Commencement and Arrival in Water-Rich Sand Stratum", Applied Mechanics and Materials, Vols. 90-93, pp. 2119-2124, 2011