The shield TBM is regarded as an effective tool during construction under soft geological condition, which has a history of 30 years in China.

盾构掘进机是在软弱地质条件下安全施工的有效机具，在我国已有30多年的历史。

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And in road project construction process, but often the special geological influence by, especially by the influence of the soft soil, and make the road not guarantee quality.

而在道路工程建设过程中，其却常受特殊地质的影响，尤其是受软土的影响，而使道路质量得不到保证。

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However, due to the vast, complex geological conditions, with large areas of soft soil.

但是，由于我国幅员辽阔，地质情况复杂，拥有大量的软土区。

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