portal是什么意思

网络释义

用法例句

This paper analyzes the reasons of two collapses of Menkoushan Tunnel,introduces two different treatment schemes for providing reference for the similar problems in the after construction.

分析了门口山隧道两次塌方的原因,介绍了不同的两种处置方案,以期为以后施工中遇到同类问题提供借鉴。

The blot and up-inject technology which combines drilling,anchoring and grouting in Houmen tunnel located in Guangdong province of China successfully improved the physical and mechanical behaviors of surrounding rocks and increased anchoring forces of bolt.

广东省鲘门隧道的病害整治工程采用钻孔、锚固和注浆一体化的自钻式中空锚杆锚注加固技术,改善围岩的物理力学性能,有效提高锚杆的锚固力,增强整个拱部的整体稳定性,达到隧道渗漏水整治效果,可取得良好的经济和社会效益。