Pipe roof support is an assisted method of shallow tunneling.
管棚支护是浅埋暗挖法施工中的一种辅助工法。
Meanwhile, the pipe-roof grouting and pile anchoring method have been adopted also to strengthen the bedding strata of the large span tunnel.
同时对浅埋、富水和地质顺层地段分别采用管棚注浆和锚固桩加固的方法进行了处理。
For the case of safety, its construction will adopt pipe-roof culvert box jacking method.
为慎重起见，拟采用管幕保护下的顶进法施工。
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