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。
The paper compares the pipe joint method of 3-branches with that of globe on the roof of blast furnace, and expounds the practicability of globe joint.
比较了高炉炉顶煤气管三岔管式连接和球式连接的特点，阐明了球式连接的实用性。
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