The expressway from Lin'an to Jinhua in Zhejiang Province, known as the Lin'an-Jinhua Expressway, starts at Qianqiuguan at the border of Zhejiang and Anhui. This major road connects the two provinces, passing through Lin'an, Tonglu, and Jiande, and finally reaching Jiande in Hangzhou. The total length of this segment is 85.5 kilometers, with a designed speed of 100 kilometers per hour. Once completed, it will significantly shorten the distance from central and western Zhejiang to Hangzhou and will become a new route for the northern part of Lanxi.

　　Due to the mountainous terrain, the Lin'an-Jinhua Expressway includes 70 bridges and 30 tunnels. Among these, the Yinggong Tunnel is the longest mountain expressway tunnel in Hangzhou, with the right section measuring 4412 meters and the left section 4452 meters. It is also the longest tunnel on the Lin'an-Jinhua Expressway. Given the tunnel's length and its passage through mountainous terrain, ventilation, drainage, and dust reduction during construction pose significant challenges.

　　To ensure the smooth progress of the project, the Hangzhou transportation authorities made advanced plans, overseeing and guiding the project team to develop a scientific construction plan. Meanwhile, the workers on the Yinggong Tunnel actively responded to the call of the Lin'an-Jinhua Expressway by introducing advanced machinery such as double-arm rock drilling rigs, waterproof board laying trolleys, and invert bridges. They created a mechanized construction line from excavation to support completion, thus improving construction efficiency.

　　LANHI's LCG312A multifunctional arch trolley is a device that integrates functions such as steel arch installation, mesh welding, rebar connection, and excavation face measurement. This equipment uses a truck chassis, which allows for flexible movement and transfer, efficiently addressing various situations. Its three-arm system features a middle arm with remote control and side arms with local control, allowing simultaneous operation. This not only reduces labor costs and construction risks but also achieves standardization and industrialization of tunnel arch installation.

　　On January 17, 2022, a significant part of the Lin'an-Jinhua Expressway—the Yinggong Tunnel—was successfully completed, marking the breakthrough of the main line of the Lin'an-Jinhua Expressway.

　　The expressway from Lin'an to Jinhua in Zhejiang, abbreviated as Linjin Expressway, starts at the border of Zhejiang and Anhui, called Qianqiuguan, which is a major road connecting these two provinces. This road passes through Lin'an, Tonglu, Jiande, and finally reaches the Jiande section of Hangzhou Xinjing. This section of the road is 85.5 kilometers long, with a designed speed of 100 kilometers per hour. Once completed, it will greatly shorten the distance from central and western Zhejiang to Hangzhou, and also serve as a new passage for the northern Lixi region.

　　Because it is a highway built in mountainous areas, there are a total of 70 bridges and 30 tunnels on Linjin Expressway. Among them, Yinggong Tunnel is the longest mountain highway tunnel in Hangzhou. The tunnel on the right is 4412 meters long, and the one on the left is 4452 meters long, making it the longest tunnel on Linjin Expressway. Due to the long length of the tunnel passing through the mountain, ventilation, drainage, dust reduction, and other works are very difficult during construction.

　　In order to ensure the smooth progress of this project, Hangzhou Transportation made advance plans and supervised and guided the project team to develop scientific construction plans. At the same time, people working on Yinggong Tunnel actively responded to the call of Linjin Expressway and introduced some advanced mechanical equipment, such as double-arm rock drilling platform carts, waterproof board laying platform carts, and arch bridges. They have created a mechanized construction assembly line from excavation to support, improving construction efficiency.

　　The LanHi LCG312A multi-functional platform is a device that integrates functions such as steel arch installation, welding mesh and connecting bars, and excavation surface measurement. This equipment uses a car chassis, so it can move and relocate flexibly to deal with various situations, with high efficiency. Its three arms adopt remote control for the middle arm and local remote control for the side arms, enabling simultaneous operation. This not only reduces labor costs and construction risks but also achieves the standardization and industrialization of tunnel arch erection.

　　On January 17, 2022, an important part of Linjin Expressway—Yinggong Tunnel was successfully penetrated, marking the completion of the main line of Linjin Expressway.

　　Ehan Expressway, abbreviated as Ehan Expressway, connects Emeishan City and Hanyuan County, serving as an important part of Le'er Expressway and Lexi Expressway. This road passes through Ebian Yi Autonomous County, Mabian Yi Autonomous County, Jinkouhe District, and Wushidaqiao Township, Ganluo County, and finally reaches Hanyuan County, Ya'an City. The completion of Ehan Expressway connects five important expressways within the province, including Yaxi Expressway, Leya Expressway, Chengle Expressway, Leyi Expressway, and Lezi Expressway, forming a complete expressway network.

　　Ehan Expressway has a planned mileage of 123.48 kilometers, designed as a two-way four-lane road with a speed limit of 80 kilometers per hour. There are 11 interchange-style interchanges along the expressway, namely Emei (Hub), Luomu, Shaxi, Longchi, Dawei, Ebian, Heizhugou, Jinkouhe, Wushe River, Hanyuan East, and Hanyuan North (Hub). The setting of these interchanges effectively improves traffic efficiency and provides convenience for the economic development and people's livelihood in the surrounding areas.

　　The Yingjiping Tunnel of Ehan Expressway is located in Tonghua Village, Yiping Township, Ebian County. The tunnel passes through the mountainous area of western Sichuan, where the terrain is undulating and complex, posing great difficulties for the design and construction of the tunnel. In addition, the geological structure in this area is active, with developed faults and folds, coupled with long-term weathering and erosion, resulting in uneven and easily fragmented formations, increasing the uncertainty and risk of tunnel construction.

　　Blue Ocean Intelligent Equipment Manufacturing Co., Ltd. LCHP40-C Vehicle-Mountedwet spray manipulator, using a car chassis, is a specialized equipment developed and upgraded based on the domestic tunnel initial support concrete shotcrete technology and construction conditions. The equipment features a large spraying volume (maximum spraying volume of 40m?/h), unclogged pipes, low rebound, good maneuverability, stable and reliable performance, etc. It solves the shortcomings of traditional small wet shotcrete machines in meeting the needs of large and long tunnel concrete spraying, improves construction efficiency, and reduces concrete consumption.

　　The construction of Yingjiping Tunnel adopts modern tunnel engineering technology, including advanced ventilation, lighting, monitoring, and safety facilities, ensuring the safe operation of the tunnel. Due to the complex terrain and geological conditions that the tunnel passes through, various challenges were encountered during the construction process, such as high ground stress and heavy water hazards. However, through scientific planning and strict management, these issues have been addressed.

　　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 Sichuan Along-the-River Expressway starts from Xinshi Town in Yibin City and extends to the Jinjiang Interchange of G5 Beijing-Kunming Expressway on the east side of Panzhihua City. This route passes through four world-class hydroelectric stations and crosses several strong seismic fault zones. There are 219 bridges on the route, including 37 extra-large bridges, and 93 tunnels, including 35 particularly long tunnels.

　　The Qingping Tunnel No.1 is located in Qingping Yi Autonomous Township, Pingshan County, Yibin City, with a total length of 2616 meters, and is a two-way four-lane separated tunnel. The terrain and geological conditions of this tunnel are extremely complex. The rocks inside the tunnel are mainly carbonaceous mudstone and medium sandstone, with some coal seams interspersed. These rocks have poor cohesion, are thinly layered, and pose a high risk of gas control, making construction very difficult.

　　The Qingping Tunnel No.2 is also located in Qingping Yi Autonomous Township, Pingshan County, Yibin City, with a total length of 1634 meters, and is also a two-way four-lane separated tunnel. The terrain and geological conditions of this tunnel are similarly complex. The terrain at the entrance of the tunnel is extremely steep, with a slope of up to 80 degrees and a height difference of nearly 100 meters. The construction process requires traversing more than ten winding gravel roads from the provincial road to the construction site, with local slopes reaching 16% and a vertical rise of nearly 200 meters. The entrance road is very steep. The gravel soil at the entrance of the tunnel is loose, and the space of the construction platform at the entrance of the tunnel is extremely limited, making the site conditions very harsh. Inside the tunnel, there are mainly strongly weathered sandstone, karst filling material, and gravel soil, with many large karst caves and a daily water inflow of up to 13,000 cubic meters, posing high construction difficulty and safety risks.

　　The LanHi LDG312A intelligent arch frame integrated trolley adopts a lightweight design solution, with light weight and small size. The trolley integrates multiple processes such as measurement point setting, under-excavation operation, arch frame installation, welding mesh, and connection bars, and can complete the excavation and arch frame installation of a double-line tunnel at one go without moving the machine. The whole vehicle adopts an engineering chassis, diesel-electric dual-power system, bidirectional driving platform structure, good driving performance, and can adapt to various complex tunnel road conditions. The boom adopts wireless remote control operation, which is easy to accurately control the action of the mechanical arm and has the characteristics of fast, efficient, energy-saving, and safe.

　　On December 7, 2022, the right tunnel of the Qingping Tunnel No.2 was successfully penetrated. On May 25, 2023, at 9 a.m., the right tunnel of the Qingping Tunnel No.1 was safely and smoothly penetrated from the gas tunnel of the XJ4 section of the Along-the-River Expressway.

　　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 Linjin Expressway, also known as the Lin'an to Jinhua Expressway, connects Lin'an, Tonglu, Jiande, Lanxi, Jinhua, and other areas, serving as a new passage for the development of the northern region of Lanxi. It adopts the standard of a two-way four-lane expressway, with a design speed of 100 kilometers per hour and a standard roadbed width of 26 meters, spanning approximately 150 kilometers in total. However, the construction of this highway is no easy task, as it traverses multiple mountainous and hilly areas with complex and varied terrain. Tunnels must pass through mountains, and bridges must span gorges, presenting significant challenges to the construction work.

　　To overcome these difficulties, the construction units have utilized modern technology, such as LanHi's LCG312A intelligent integrated arch frame trolley. This equipment integrates functions such as steel arch installation, welding mesh and connecting bars, excavation surface measurement, and more into one unit. Moreover, it is equipped with a car chassis, providing it with the capability for flexible movement, relocation, and emergency response. Additionally, the equipment is equipped with a three-arm frame, with the middle arm operated remotely and the side arm equipped with a local remote dual operating system. The use of these advanced devices not only reduces labor costs and construction risks but also improves work efficiency, achieving the standardization and industrialization of tunnel arch erection.

　　In the future, the Linjin Expressway will become an important transportation artery for Zhejiang Province and even the Yangtze River Delta region, playing a crucial role in regional integration and development. The completion of the Linjin Expressway will greatly shorten the distance from central and western Zhejiang to Hangzhou, providing strong support for local economic development and transportation convenience. Despite facing many challenges during the construction process, with the aid of modern technology and advanced equipment, people have overcome difficulties, gradually turning this expressway into a reality and bringing new opportunities and vitality to the surrounding areas' development.

　　The Chengdu Tianfu International Airport Expressway, commonly known as the "Tianfu Airport Expressway," is an important highway connecting the Jinjiang District, Shuangliu District, and Jianyang City in Chengdu. This road is part of the highway from Guiyang to Chengdu, as well as from Chengdu to Ziyang and Chongqing. The Longquanshan Tunnel is a key project on this expressway, located in Longquanyi District of Chengdu, with a total length of 4651 meters, traversing the Longquanshan mountain range. The design of this tunnel is the first in the country to feature "bidirectional four-tube ten-lane" configuration, meaning future traffic will be segregated for passenger and freight, with outer lanes designated for trucks and inner lanes for cars.

　　The geological structure of the Longquanshan area is complex, with numerous fractured fault zones, posing great challenges to tunnel construction. Apart from geological challenges, adverse weather conditions also present a major test. The high altitude of the Longquanshan area leads to unpredictable climate changes, ranging from heavy rainfall to bone-chilling winds, greatly inconveniencing the lives and work of construction personnel.

　　LanHi's LTYQ24C Mobile Wharf supported China Railway Eighth Bureau in the construction of the Longquanshan Tunnel, assisting engineers in overcoming numerous difficulties and successfully completing the project.

　　On the morning of December 30, 2021, at 10:00 a.m., the Longquanshan Tunnel, Sanchazi Tunnel, and Mopandeng Tunnel in the Jianyang section of the Chengdu Third Ring Expressway were simultaneously connected. This milestone event marks significant progress in the construction of the Jianyang section of the Chengdu Third Ring Expressway, laying a solid foundation for the full opening of the project.

　　Ehan Expressway, abbreviated as Ehan Expressway, connects Emeishan City and Hanyuan County, serving as an important part of Le'er Expressway and Lexi Expressway. This road passes through Ebian Yi Autonomous County, Mabian Yi Autonomous County, Jinkouhe District, and Wushidaqiao Township, Ganluo County, and finally reaches Hanyuan County, Ya'an City. The completion of Ehan Expressway connects five important expressways within the province, including Yaxi Expressway, Leya Expressway, Chengle Expressway, Leyi Expressway, and Lezi Expressway, forming a complete expressway network.

　　Ehan Expressway has a planned mileage of 123.48 kilometers, designed as a two-way four-lane road with a speed limit of 80 kilometers per hour. There are 11 interchange-style interchanges along the expressway, namely Emei (Hub), Luomu, Shaxi, Longchi, Dawei, Ebian, Heizhugou, Jinkouhe, Wushe River, Hanyuan East, and Hanyuan North (Hub). The setting of these interchanges effectively improves traffic efficiency and provides convenience for the economic development and people's livelihood in the surrounding areas.

　　The Yingjiping Tunnel of Ehan Expressway is located in Tonghua Village, Yiping Township, Ebian County. The tunnel passes through the mountainous area of western Sichuan, where the terrain is undulating and complex, posing great difficulties for the design and construction of the tunnel. In addition, the geological structure in this area is active, with developed faults and folds, coupled with long-term weathering and erosion, resulting in uneven and easily fragmented formations, increasing the uncertainty and risk of tunnel construction.

　　LanHi Intelligent Equipment Manufacturing Co., Ltd. LCHP40-C Vehicle-Mountedwet spray manipulator, using a car chassis, is a specialized equipment developed and upgraded based on the domestic tunnel initial support concrete shotcrete technology and construction conditions. The equipment features a large spraying volume (maximum spraying volume of 40m?/h), unclogged pipes, low rebound, good maneuverability, stable and reliable performance, etc. It solves the shortcomings of traditional small wet shotcrete machines in meeting the needs of large and long tunnel concrete spraying, improves construction efficiency, and reduces concrete consumption.

　　The construction of Yingjiping Tunnel adopts modern tunnel engineering technology, including advanced ventilation, lighting, monitoring, and safety facilities, ensuring the safe operation of the tunnel. Due to the complex terrain and geological conditions that the tunnel passes through, various challenges were encountered during the construction process, such as high ground stress and heavy water hazards. However, through scientific planning and strict management, these issues have been addressed.

　　The Wuxi-Yunyang-Kaizhou Expressway, abbreviated as Wuxi-Yun-Kai Expressway, is an important expressway connecting Wuxi, Yunyang, and Kaizhou, with a total length of 118.6 kilometers. This expressway has a total of 86 bridges and 21 tunnels, with a bridge-tunnel ratio as high as 60%. Designed with a speed limit of 80 kilometers per hour, it is a four-lane expressway in both directions.

　　Among them, the Chaoyang Tunnel is a key node project of the Wuxi-Yun-Kai Expressway, with a total length of 5132 meters for the left line and 5110 meters for the right line, making it an exceptionally long tunnel. The geological environment of this tunnel is extremely complex, facing various disaster conditions such as landslides, collapses, sudden mud and water inflows, coal and gas outbursts, and rock bursts, making construction extremely challenging.

　　LanHi's LGP340A intelligent integrated arch frame trolley integrates multiple processes such as measurement, excavation, arch frame installation, welding of mesh and connecting bars, etc. It can complete the excavation and arch frame installation of the double-line tunnel without moving the machine; the whole vehicle adopts an engineering chassis, with dual power systems of diesel and electricity, a bidirectional cab structure, good driving performance, and adaptability to various complex tunnel road conditions; the boom adopts wireless remote control + manual control operation, making it easy to control the movement of the mechanical arm, with features of rapid operation, high efficiency, and energy saving.

　　According to the plan, the Chaoyang Tunnel is scheduled to complete the construction of 6000 meters by 2023, and is expected to be fully connected in the second quarter of 2024. As of March 28, 2024, it was reported that the overall construction progress of the Wuxi-Yun-Kai Expressway has reached 87%.