Guangxi: New Breakthrough in Tunnel Excavation of the First Branch of Baqiang Expressway

 October twenty first，Tian'e, Guangxi—Bama to Pingguo Section of Beihai Highway（Bama to Qiang Wei）Division I（Abbreviated as a branch of Baqiang Expressway）The cumulative excavation of a single tunnel has exceeded 2000 meters.，Complete 16% of the total design length%，Significant progress has been made in the construction of the project tunnel.。

The first branch project of Baqiang Expressway is located in Linlan Village, Xishan Township, Bama Yao Autonomous County, Hechi City, Guangxi Zhuang Autonomous Region.，The main line is about 17 kilometers long.，Adopt the standard construction of two-way six-lane expressway。Among them, there are 10 two-way six-lane tunnels.（The total length is 12458 meters），There are seven mainline tunnels.，Five of them are medium and long tunnels.，The longest tunnel is 1.6 km of Nongmei No.1 Tunnel，All tunnels of the main line have been constructed.，The ratio of bridge to tunnel of the main line is 63.52%，The ratio of bridge to tunnel of the branch line reaches 45.84%。

The project is located in a hilly area.，Karst landform，There are karst caves、Underground river、Fault fracture zone，The surrounding rock of the tunnel is mainly weathered limestone.，The construction of two-way six-lane tunnel is difficult.，Higher quality requirements。Since the preparation of the project，All personnel involved in the construction overcome the geological、Landform construction is difficult and many other unfavorable conditions.，The project department took the initiative，Plan ahead，Organize relevant units to carry out special tunnel construction scheme discussion for many times，And invite senior experts to review.，Press“One hole, one plan”Principle，Pursue“Plan first，Post-review，Re-implementation”Steadily promote the construction of the tunnel。

To ensure the safety and quality of the tunnel construction of the project，Overall planning of the first branch of Baqiang Expressway，Take various measures simultaneously，One is to optimize and improve the scheme of entering the cave.，Strict enforcement“Tube advance、Strict grouting、Short footage、Strong support、Early closure、Measure frequently”The policy of；Second, fine、Intelligent construction，Actively adopt“Four new technologies”，Strictly control the disclosure of advanced geological prediction，Strengthen the monitoring and measurement of surrounding rock，Strictly observe the red line of quality and safety，To ensure the quality and safety of tunnel construction；Third, strict implementation.“Long-term insurance system”And“Tunnel system”，Strict implementation of key process acceptance，Regularly carry out special hidden danger investigation of tunnel safety，Strengthen safety monitoring；Fourth, adhere to the leadership of Party building.，Setting up Party member responsibility areas in controlled projects such as tunnels、Demonstration post for Party members，Guide the broad masses of Party members、Excellent young people are pioneers everywhere.、Take the lead、Set an example，To provide strong impetus for building high-quality projects。

Next step，The builders of the first branch of Baqiang Expressway will seize the golden period of construction in the dry season.，Strive for victory in a decisive battle，Continue to be firm in your goals、Overcome difficulties，Go all out to complete the annual construction task target。

Previous: The world's first alpine canyon landscape cable-stayed bridge was officially closed.

Next: The preliminary design of three key highway projects in Shaanxi has been approved and construction will start within the year!