December 05, 2022
Large-diameter earth pressure balance Shield Machine jointly built by China Railway Construction Heavy Industry and China Railway 12th Bureau“Xing'an”Since the smooth start,It is the first time to break through the good result of 520 meters per month.。
“Xing'an”Since September 8, 2022,A total of 1100 meters have been excavated.,Average daily footage 13.75 meters,The average daily footage in the effective driving time reached 16..18 meters,The tunneling speed reaches the highest of the same type of large-diameter EPB Shield Machine made in China.。
Earth pressure balance Shield Machine with that lar diameter in northern China“Xing'an”Originating
Jinxing Railway is connected to Tianjin.、Beijing Daxing International Airport and an important artery in the downtown area of Beijing,After completion, Tianjin and Xiongan New Area and Beijing Daxing International Airport will be accessible within half an hour.。“Xing'an”As the largest diameter earth pressure balance shield machine used in Beijing-Tianjin-Hebei region,The shield section is 2080 meters long.,The minimum overburden thickness is less than 8m.,The tunnel underpasses the south embankment of Yongding River.,Shallow burial depth near the starting well。The project has a large excavation section.、The construction distance is long、Formation viscosity is strong、Gao Fu Shui、Shallow covering soil and the like,And large diameter earth pressure shield is easy to cause large stratum disturbance.、Difficult control of soil chamber pressure and the like.,The construction is difficult。
“Xing'an”Box culvert laying site
In order to overcome the above difficulties,,Railway Construction Heavy Industry R & D technicians carry out targeted design of equipment,The first slag tapping system of parallel double spiral machine in China has been developed.,More accurate control of excavation chamber pressure,Maintain surface stability。Compared to single screw configuration,The parallel double screw machine has the advantages of maintaining the stability of the excavation face,、High accuracy of soil chamber pressure control、The construction is not delayed due to the maintenance of a single screw machine and the like.。At the same time, two screw machines discharge slag alternately.,It can effectively deal with the gushing problem of water-rich strata.,The continuity and safety of construction are guaranteed.;This configuration not only effectively reduces the risk of shield construction,,It also further improves the construction efficiency.。
“Xing'an”Acceptance offline
“Xing'an”It has been more than 80 days since its launch.,The accumulated excavation mileage has been more than half.,The overall operation of the shield is good.,Tunneling footage is gratifying。Successful Application of the Largest Diameter Earth Pressure Balance Shield Machine in Northern China,It provides more reference for similar large diameter EPB shield construction in the future.。
In the field of construction machinery,Product performance and operation experience determine the user's every day.。For 28 years,Mingyu Heavy Industries has always focused on creating construction machinery products that best understand the needs
October 30,China Railway Construction Heavy Industry Co., Ltd. held a regular meeting on administrative work and economic operation analysis in the third quarter of 2024 in Changsha,Summarize the economic performance in the first three quarters,The tas
In Ningxia, which is full of vitality and infinite hope,“Gold milk source belt”,Dairy industry has become a local landmark industry.,It is booming at an alarming rate.。In this land of plenty.,A large dairy company relies on the persistent p
Hardcore player,It can be dug and loaded. Three, one, fourSY245H Strength player,Live up to its reputation Appearance upgrade,New counterweight Tall and powerful,Face value is online Engine power rating 150kW
Copyright Notice 2002-2024 global-ce.com Construction Machinery Online. All rights reserved.
Address: Room 901, Building C, Ruipu Mansion, Hongjunying South Road No.15, Chaoyang District, Beijing.100107 P.R.China