In order to strengthen the shield tunneling control and reduce the vertical movement of the tunnel and the change of the internal force of the structure, the following principles should be followed in the construction of the tunnel support trolley on line: the earth pressure calculated in the earth pressure balance state should be the set value of the earth pressure in the shield tunneling construction; the theoretical excavated amount should be strictly used as the control value of the shield spoil; the vertical direction of the shield machine (elevation)Control principle: strictly control the vertical, horizontal and inclination deviation of shield machine, reasonably control the stroke difference of propulsion jack, and avoid large-scale axis deviation correction
At 9:00 a.m. on June 26, the first section of Shijiazhuang Metro Line 3, invested by China Railway Construction North China Investment Co., Ltd. and constructed by China Railway Construction 17th Bureau Group, was put into trial operation, marking the formal end of the history of no subway in Hebei Province, and Hebei strides into the "subway era"Shijiazhuang Metro is the first subway in Hebei Province, which started construction on September 28, 2012, and has lasted for five years.This is an important sign that Hebei has entered the "subway era". It is a milestone for the urban construction of Hebei Province. The first project of Shijiazhuang Metro has a total length of 30.3 km, with 25 stations, which mainly relieves the east-west and east-west directions of Shijiazhuang city
This summer, Metro Line 1 will usher in a new theme train.And for children, it will be more attractive.The reporter learned from Hefei rail transit company yesterday that the third theme train of line 1 will serve the public as soon as next week. The biggest feature is that all cars are designed with different themes, and the colors and patterns are full of vitality and interest.The children's theme train will be on line soon. In November last year, two theme trains were put on line 1 successively. One was themed with "Baogong culture" and painted many q-version figure paintings, which made many citizens feel super cute and full of regional characteristics of Hefei; the second one was mainly "famous city of Great Lakes"
New progress has been made in the first phase of the east section of Metro Line 11, which residents in Guanggu district are looking forward to.On the 28th, a visit to the construction site of the first phase of the east section of rail transit line 11 revealed that the tunnel section of the whole project had been completed on June 27.The first phase project of Metro crossing the hinterland of Guanggu and the east section of rail transit line 11 starts from Guanggu railway station in the West and ends at zuoling station in the East. The whole line is 19.7 km long, with 13 stations and 1 vehicle base.The project is invested by the Management Committee of Donghu New Technology Development Zone
This morning, the mobilization meeting and safety oath ceremony of Zhengzhou rail transit line 5 project was held at the track laying base of Zhongyi Road station.This marks the beginning of the construction of line 5 into a new stage - track laying.Track laying refers to laying the track for future Metro Trains in subway stations and tunnels.The track laying of line 5 is divided into three sections. The first section is started today, which is specifically responsible for construction by China Railway No.1 Bureau.At about 11:30 a.m., all the participants firmly grasped their right hands and solemnly swore.The sonorous and powerful oath expresses every employee's solemn commitment to strictly abide by safety and strictly control quality, as well as to build a good rail transit No.5