So about tunnel fire coatings research foundation was weak, the product is uneven, for tunnel construction and performance testing fireproofing enormous difficulties.
因此关于隧道防火涂料研究的基础比较薄弱，产品参差不齐，给隧道防火涂料施工和性能检测带来很大困难。
2
Through comparing several schemes, steel tube-grouting was adopted to reinforce the wall rock and the foundation of the tunnel.
经方案比选，采用钢花管对洞顶及两侧部分的地表和隧道地基与拱脚部位进行注浆加固。
3
On the study of the engineering practice of excavation of Wulong tunnel under building foundation, the three dimension numerical modeling was established by reasonable simplification and hypothesis.