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  • Construction experience of xuntou tunnel support trolley

    1) The clear distance between the two tunnels in Huhuang shield section of Shenzhen Metro Line 2 East extension line is 1.71m-2.0m, and the vault buried depth is about 14m. Within the scope of overlapping tunnels, the stratum is mainly quaternary new artificial filling soil, alluvial proluvial cohesive soil layer, sand gravel layer and residual soil layer, and the underlying bedrock is tuffaceous siltstone of Middle Jurassic Tangxia formation (an earlier example in China). 2) The minimum clear distance of overlapped section of civil engineering section 2227 of East extension line of Shenzhen Metro Line 2 is 1.36M. The overlapped tunnel is basically located in the fully, strongly and moderately weathered tuffaceous siltstone stratum, where the upper part is soft and the lower part is hard

    2020-04-29 admin two hundred and forty-four

  • Construction measures of tunnel supporting trolley on line

    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

    2019-04-17 admin one hundred and thirty-three

  • The first case of continuous right turn steel tube piece with the greatest difficulty in China passed the acceptance test

    The first domestic very difficult continuous right turn steel pipe piece passed the acceptance! The control difficulties of the project are: 1. Continuity: 14.4 meters in total of 12 continuous rings, all of which are Q420C steel pipe pieces; 2. The production is difficult: it is not easy to weld and assemble; 3. The turning radius is very small, and the hole position of all steel pipe pieces is completed with zero error; 4. The project delivery time is tight: less than 60 days from signing the contract to delivery and installation!

    2020-04-29 admin sixty-four

  • The company held 2016 annual summary and commendation meeting and 2017 annual strategic planning meeting

    From January 1 to 3, 2017, the "2016 annual summary and commendation meeting and 2017 annual strategic planning meeting" of the company's middle and senior leaders was held in the company! The meeting was presided over by Pei Guo, executive director and executive deputy general manager of the company. He made a report to the chairman, relevant directors of the board of directors, relevant business departments and functional departments of the company on the new signing, payment collection and production delivery of the company in 2016, and successfully completed the new signing task of marketing and sales formulated at the beginning of the year! At the same time, we put forward the requirement of doubling the sales volume in 2017! In 2016, xuntou Precision Machinery Co., Ltd. comprehensively summed up the past experience and continuously

    2017-11-16 admin one hundred and nine

  • Witnessing the strength of the enterprise, the company was awarded the honorary certificate by China Railway Third Engineering Group Co., Ltd

    The steel pipe piece project of Yuzhu station fengle Road Station of Guangzhou Rail Transit Line 13 construction project management department of China Railway Third Bureau Group Co., Ltd., which is contracted by us, meets the design requirements and has excellent product quality! Thank you for overcoming the production difficulties and ensuring the quality of construction period.

    2017-11-16 admin forty-two

  • News of winning the bid: on April 28, it won the bid of civil engineering of Wuxi rail transit line 3 of the second company of China Railway Fourth Engineering Bureau

    News of winning the bid: on April 28, it won the bid of civil engineering of Wuxi rail transit line 3 of the second company of China Railway Fourth Engineering Bureau

    2017-11-16 admin fifty-four

  • Hebei ushers in "subway era" Shijiazhuang Metro opens operation

    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

    2017-06-30 admin fifty-five

  • The theme train of Hefei Metro Line 1 will be launched as soon as next week, with children's content as the theme for the first time

    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"

    2017-06-30 admin twenty-nine

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