The expressway from Zhangye to Wenchuan is an important fast road connecting Zhangye City in Gansu Province and Wenchuan County in Aba Prefecture, Sichuan Province. It is also part of China's National Expressway Network from Beijing to Lhasa.

　　The Saierlong No. 1 Tunnel is located in Saierlong Township, Henan Mongolian Autonomous County, Huangnan Tibetan Autonomous Prefecture, Qinghai Province. It is a separated dual carriageway tunnel, with the left line measuring 840 meters and the right line 793 meters. Construction of the tunnel began on May 24, 2022.

　　The geological conditions of the Saierlong No. 1 Tunnel are quite complex, with surrounding rocks prone to looseness and fragmentation, high soil moisture content, and high risks of collapse. To ensure project quality and construction safety, all participating units continuously optimized processes and methods, strictly controlled safety production, detailed safety measures, and completed the full line tunneling on schedule.

　　The LanHi LGM312C intelligent arch anchor integrated trolley adopts an engineering chassis and is equipped with a single anchor rod system. The entire machine features four-wheel steering, four-wheel drive, and bidirectional driving functions, with a dual power system of diesel and electric, electric construction, and diesel emergency backup. With three-arm remote control, it meets the requirements for prefabricated arch frame installation, various step-by-step operations, and arch frame positioning adjustments. During arch frame installation, it can handle excavation and welding operations, demonstrating strong adaptability to tunnel conditions.

　　In the early morning of August 8, 2023, the left line of the Saierlong No. 1 Tunnel on the G0611 Zhangye to Wenchuan Expressway project was successfully completed. Subsequently, on September 14, the right line was also successfully completed, marking the completion of the dual-line construction of the tunnel.

　　The Chongqing-Kunming High-Speed Railway, abbreviated as the Chongqing-Kunming High-Speed Rail, is a rapid railway connecting Chongqing and Kunming, passing through Sichuan, Guizhou, and Yunnan. It spans approximately 698.96 kilometers, with 21 stations along its route, and has a design speed of 350 kilometers per hour.

　　The Zhaotong Tunnel is part of the Chongqing-Kunming High-Speed Railway, stretching approximately 16.2 kilometers, including a 4.2-kilometer section through coal seams. The third horizontal shaft of this tunnel is located in Suoye Village, Luozhe River Town, Yilang County, Zhaotong City, Yunnan Province, at an altitude of about 1700 meters. The climate here is cold and humid, with more rainy days than sunny ones throughout the year, making construction conditions extremely challenging. The geological formation primarily consists of limestone, with abundant underground karst water resources.

　　The LanHi LGM312U intelligent integrated arch anchor trolley features an engineering chassis and is equipped with a single anchor system. The machine features four-wheel steering, four-wheel drive, two-way driving and other functions. Its diesel-electric dual power system supports electric construction and diesel-powered emergency operations. The three-arm remote control can meet the requirements for prefabricated arch frame installation, operation of various benching methods and precise positioning adjustment of the arch frame. The arch frame can handle under-excavation and welding operations during installation, and the tunnel itself is very flexible.

　　Construction of the Chongqing-Kunming High-Speed Railway in the Chongqing and Sichuan sections began on September 29, 2019. By February 20, 2022, the first horizontal shaft of the Zhaotong Tunnel achieved smooth breakthrough. As of February 2024, excavation of the Zhaotong Tunnel has exceeded 7 kilometers, with the third horizontal shaft expected to enter formal excavation by the end of April. The Chongqing-Kunming High-Speed Railway's Chongqing-Sichuan section is scheduled to be completed and opened to traffic by the end of 2024.

　　The expressway from Zhangye to Wenchuan is an important fast road connecting Zhangye City in Gansu Province and Wenchuan County in Aba Prefecture, Sichuan Province. It is also part of China's National Expressway Network from Beijing to Lhasa.

　　The Saierlong No. 1 Tunnel is located in Saierlong Township, Henan Mongolian Autonomous County, Huangnan Tibetan Autonomous Prefecture, Qinghai Province. It is a separated dual carriageway tunnel, with the left line measuring 840 meters and the right line 793 meters. Construction of the tunnel began on May 24, 2022.

　　The geological conditions of the Saierlong No. 1 Tunnel are quite complex, with surrounding rocks prone to looseness and fragmentation, high soil moisture content, and high risks of collapse. To ensure project quality and construction safety, all participating units continuously optimized processes and methods, strictly controlled safety production, detailed safety measures, and completed the full line tunneling on schedule.

　　The LanHi LGM312C intelligent arch anchor integrated trolley adopts an engineering chassis and is equipped with a single anchor rod system. The entire machine features four-wheel steering, four-wheel drive, and bidirectional driving functions, with a dual power system of diesel and electric, electric construction, and diesel emergency backup. With three-arm remote control, it meets the requirements for prefabricated arch frame installation, various step-by-step operations, and arch frame positioning adjustments. During arch frame installation, it can handle excavation and welding operations, demonstrating strong adaptability to tunnel conditions.

　　The LanHi LGM312U intelligent integrated arch anchor trolley features an engineering chassis and is equipped with a single anchor system. The machine features four-wheel steering, four-wheel drive, two-way driving and other functions. Its diesel-electric dual power system supports electric construction and diesel-powered emergency operations. The three-arm remote control can meet the requirements for prefabricated arch frame installation, operation of various benching methods and precise positioning adjustment of the arch frame. The arch frame can handle under-excavation and welding operations during installation, and the tunnel itself is very flexible.

　　In the early morning of August 8, 2023, the left line of the Saierlong No. 1 Tunnel on the G0611 Zhangye to Wenchuan Expressway project was successfully completed. Subsequently, on September 14, the right line was also successfully completed, marking the completion of the dual-line construction of the tunnel.

　　The Chongqing-Kunming High-Speed Railway, abbreviated as the Chongqing-Kunming High-Speed Rail, is a rapid railway connecting Chongqing and Kunming, passing through Sichuan, Guizhou, and Yunnan. It spans approximately 698.96 kilometers, with 21 stations along its route, and has a design speed of 350 kilometers per hour.

　　The Zhaotong Tunnel is part of the Chongqing-Kunming High-Speed Railway, stretching approximately 16.2 kilometers, including a 4.2-kilometer section through coal seams. The third horizontal shaft of this tunnel is located in Suoye Village, Luozhe River Town, Yilang County, Zhaotong City, Yunnan Province, at an altitude of about 1700 meters. The climate here is cold and humid, with more rainy days than sunny ones throughout the year, making construction conditions extremely challenging. The geological formation primarily consists of limestone, with abundant underground karst water resources.

　　The LanHi LGM312U intelligent integrated arch anchor trolley features an engineering chassis and is equipped with a single anchor system. The machine features four-wheel steering, four-wheel drive, two-way driving and other functions. Its diesel-electric dual power system supports electric construction and diesel-powered emergency operations. The three-arm remote control can meet the requirements for prefabricated arch frame installation, operation of various benching methods and precise positioning adjustment of the arch frame. The arch frame can handle under-excavation and welding operations during installation, and the tunnel itself is very flexible.

　　Construction of the Chongqing-Kunming High-Speed Railway in the Chongqing and Sichuan sections began on September 29, 2019. By February 20, 2022, the first horizontal shaft of the Zhaotong Tunnel achieved smooth breakthrough. As of February 2024, excavation of the Zhaotong Tunnel has exceeded 7 kilometers, with the third horizontal shaft expected to enter formal excavation by the end of April. The Chongqing-Kunming High-Speed Railway's Chongqing-Sichuan section is scheduled to be completed and opened to traffic by the end of 2024.

　　The Yun-Kun High-Speed Railway is a high-speed railway connecting Chongqing and Kunming in Yunnan Province. It spans nearly 700 kilometers, with 21 stations and a design speed of up to 350 kilometers per hour. Construction of the Yun-Kun High-Speed Railway began on September 29, 2019, in the Chongqing and Sichuan sections, and the Yunnan section officially commenced on December 20, 2019.

　　The Junlian Tunnel in the Chongqing-Sichuan section of the Yun-Kun High-Speed Railway is being constructed by China Railway Eighth Bureau and is located at the border of Junlian County in Yibin City, Sichuan Province, and Yanjin County in Yunnan Province. This is a single-hole double-track tunnel with a total length of 7,888 meters, featuring one crosscut divided into two working areas with three construction faces. The longest excavation face measures approximately 4,015 meters, with a total construction period of 43 months.

　　The Junlian Tunnel is a challenging engineering project along the entire railway line, passing through the Datianba anticline area. The geological conditions here are extremely complex, with karst landforms, coal seam gas, rock strata under pressure, and high ground stress, among other adverse geological conditions. As a result, the construction difficulty is significant, with high safety risks.

　　The LanHi intelligent integrated arch anchor trolley adopts an engineering chassis and is equipped with a dual anchor system. The machine features four-wheel steering, four-wheel drive, two-way driving and other functions. Its diesel-electric dual power system supports electric construction and diesel-powered emergency operations. The threearm remote control can meet the requirements for prefabricated arch frame installation, operation of various benching methods and precise positioning adjustment of the arch frame. The arch frame can handle under-excavation and welding operations during installation, and the tunnel itself is very flexible.

　　As of June 12, 2023, the excavation work of the key Junlian Tunnel in the Chongqing-Sichuan section of the Yun-Kun High-Speed Railway has surpassed the milestone of two kilometers, completing 29% of the total length.

　　The Westward Extension High-Speed Railway, abbreviated as the Westward Extension High-Speed Rail, is a high-speed railway connecting Xi'an and Yan'an. The line starts from the north end of Xi'an East Station, passes through a series of cities and regions, and ultimately extends to Yan'an New District Station. With a total length of approximately 291.7 kilometers and a total investment of 60 billion yuan, it is designed for a speed of 350 kilometers per hour.

　　The New Yan'an Tunnel is an important tunnel on the Westward Extension High-Speed Railway, with a total length of 16 kilometers, making it the first long tunnel to be completed along the entire line. It is located between Baota District in Yan'an City and Ganquan County, and is a single-bore double-track tunnel. Due to its location in the loess hilly and gully region, the geological conditions are complex, making it one of the tunnels with the highest safety risks and construction difficulties on the Westward Extension High-Speed Railway.

　　The LanHi LGM312H intelligent integrated arch anchor trolley adopts an engineering chassis and is equipped with a dual anchor system. The machine features four-wheel steering, four-wheel drive, two-way driving and other functions. Its diesel-electric dual power system supports electric construction and diesel-powered emergency operations. The threearm remote control can meet the requirements for prefabricated arch frame installation, operation of various benching methods and precise positioning adjustment of the arch frame. The arch frame can handle under-excavation and welding operations during installation, and the tunnel itself is very flexible.

　　On December 9, 2024, the New Yan'an Tunnel of the Xi'an to Yan'an High-Speed Railway was successfully completed. This milestone event marks that 50% of the tunneling along the entire Westward Extension High-Speed Railway has been completed, laying a solid foundation for the timely opening of the railway.

　　The BaoYin High-Speed Railway connects Baotou City in Inner Mongolia Autonomous Region with Yinchuan City in Ningxia Hui Autonomous Region. This is China's first high-speed railway connecting two autonomous regions of ethnic minorities. The railway stretches from Baotou Station to Yinchuan Station, with a total length of 519 kilometers and 13 stations, designed for a speed of 250 kilometers per hour.

　　The Gandershan Tunnel is the only tunnel project on the BaoYin High-Speed Railway and is one of the key projects in the entire project. It has a total length of 12,095 meters and is a double-line long tunnel, with a maximum burial depth of about 294.4 meters. This tunnel is constructed by China Railway Tenth Group Co., Ltd. The geology of Gandershan Mountain is complex, with varied terrain, including mountainous ravines and dense fault structures. The tunnel crosses 17 fault fracture zones, and the overall stability of the surrounding rock mass is poor. It is also close to the remains of the Qin and Han Great Wall. It must pass through lead mine goaf areas and a national-level Four-Unity Wood Nature Reserve, making construction highly risky and difficult.

　　The LanHi LGM312H intelligent arch anchor integrated trolley adopts an engineering chassis, equipped with a double anchor rod system. The whole machine has functions such as four-wheel steering, four-wheel drive, two-way driving, diesel-electric dual-power system, electric construction, and diesel-driven emergency operation. The three-arm remote control meets the requirements of prefabricated arch installation, various benching operations, arch positioning adjustment, and can handle excavation and welding operations during arch installation, showing strong adaptability to tunnel construction.

　　On April 29, 2023, the first incline well of the Gandershan Tunnel, undertaken by China Railway Tenth Group, successfully reached the top. The plan is to complete the entire tunnel's penetration by December 2024 and lay the ballastless track by May 2025.

　　The Xikang High-Speed Railway is a rapid railway connecting Xi'an and Ankang, passing through Shaanxi Province and ultimately connecting to Chongqing. With a design speed of 350 kilometers per hour, this railway line features 26 large and medium-sized bridges and 20 tunnels, including 4 particularly long tunnels and 11 long tunnels. It could be described as a "tunnel road"! Construction of this railway officially commenced on June 29, 2021.

　　The Baiyangping Tunnel is part of the Xikang High-Speed Railway's Xunyang section, located within the jurisdiction of Tongmu Town, with a total length of 6606.43 meters. This tunnel is situated adjacent to the seismic fault zone of the mountain range, making the surrounding environment highly sensitive. Moreover, the geological rock formations along the route are not very favorable, with over 90% consisting of conglomerate rocks, and there are many sliding waves and dangerous rocks at high levels along the strata, posing significant safety risks during construction.

　　The LanHi LGM312C Intelligent Arch Anchor Integrated Trolley adopts an engineering chassis and is equipped with a single anchor rod system. The entire machine features functions such as four-wheel steering, four-wheel drive, and bidirectional driving. It operates with a dual diesel-electric power system, with electric operation and diesel emergency backup. With three-arm remote control, it meets the requirements for prefabricated arch installation, various step-by-step operations, and arch positioning adjustments. It can handle under-excavation and welding operations during arch installation, demonstrating strong adaptability to tunnel conditions.

　　As of the end of November 2023, excavation of the Baiyangping Tunnel has completed 65% of the entire tunnel length.