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平导

网络Parallel heading

平导

平导

Parallel heading

宜万铁路齐岳山隧道高压富水断层施工关键技术... ... Main tunnel（正洞） Parallel heading（平导） By-pass heading（迂回 …

1

Objective : To understand the root resorption caused by flat bite plate treatment during different growth period .

摘要目的：比较不同生长期使用平导对牙根吸收影响。

3

The direct prediction method mainly includes forward boring starting from heading face and pilot heading.

直接预报方法主要有掌子面的超前钻探、超前平导法等；

4

Conclusion : The root resorption caused by flat bite plate is different during different growth period .

结论：不同生长期使用平导造成牙根吸收有区别。

6

Geological Forecasting in East Qinling Tunnel Construction

东秦岭特长隧道平导施工地质超前预报

7

Construction of Parallel Heading with Gas for Jindong Tunnel

金洞隧道平导瓦斯地段施工措施

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