weak stratum

numerical research on rayleigh wave propagation of weak stratum

软弱地层中瑞雷波传播的数值模拟研究

When the geosound is propagating in the stratum, the low frequency part of it propagates far in the solid dielectric, while the high frequency part is attenuated so fatly that the signal strength the detector detected is small and extremely weak.

地声在地层中传播时，低频率部分在固体介质中传播较远，而高频部分的衰耗很大，而且探测器接受到的信号强度很小，极其的微弱。

On Measures to Overcome Difficult Encountered in Weak Stratum during Construction Stage of Tunnel Built by Double-shield Tunnel Boring Machine Design of Hydraulic Loading System for a Composite Test Stand of Full Face TBM

双护盾全断面掘进机（TBM）遇软岩洞段的解困方案全断面掘进机综合试验台加载液压系统设计

this research plays an important guiding role and provides a significant reference value for tunnel construction in watery and weak stratum.

该成果对富水软弱地层隧道修建具有重要的指导作用和参考价值。