draining tunnel

The right bank slope of entrance open ditch for a diversion, flood-discharge and draining sand tunnel project in Xiatianji reservoir of Jinghe county is excavated.

精河县下天吉水库导流、泄洪、排砂洞工程进口明渠右岸边坡开挖。

Secondly, it brings forward that it is a practical technical and structure mode to use the multiple preventing layer as the water preventing and draining system in highway tunnel of loess.

然后在总结现有公路隧道防排水技术特点的基础上，提出了黄土公路隧道防排水系统宜采用复合防水层为主的适用技术与结构型式，得出了一些有益的结论。

Constructive technology of circle draining semi-round tube in tunnel

隧道环向排水半圆管施工技术

Influence of long-term draining groundwater in karst tunnel on permeability of its surrounding rock

岩溶隧道长期排水对围岩渗透性的影响