To understand the advanced support of tunnel pipe مؤقت وظيفة
2022-10-26 02:58 خدمة مجالسة الأطفال Dubai 256 الآراء المرجعي: 2541تفاصيل الوظيفة
Original title: Understand the advanced support of tunnel pipe shed at one time. There are too many detailed words. You need to collect them first! Source: Zhulong Forum Copyright belongs to the original author. As an auxiliary er existing buildings, highways,dth button bits, railways and underground structures; As an auxiliary construction method for the construction of tunnel portal section and large-section tunnel, and as an and adjusted according to the actual situation during constructiopport: Pipe shed steel pipe diameter range is generally φ70-180mm, we can classify the pipe shed support into small pipe shed, medium pipe shed and large pipe shed according to the pipe diameter. The pipe diameter of the small pipe shed is generally within the range of φ32 ~ 50mm,dth drilling hammer, and the steel pipe with the pipe diameter of φ42mm is mostly used. The pipe length is preferably 3.5-5m, the circumferential spacing is generally 0.3-0.4m, and the horizontal overlapping length is 1-1.5m. The pipe diameter of the middle pipe actual construction, it is generally difficult to avoid horizontal borehole bending, mining dth bit ,rock drilling tools, so in addition to improving the positioning accuracy of the pipe roof, appropriate uplift (determined according to the geological conditioroutinof the steel pipe isoor (such as sandy soil, seriously broken rocks, loess, etc.). Generally, the length is about 20-30 meters. The pipe shed is a steel pipe with a wall thickness of 3.5mm and a diameter of 108mm. Of course,mining drill bit, the pipe shed can also be used when the geological conditions in the tunnel are very poor (for example, the length along the axis of the tunnel caused by roof fall in the tunnel is large, and the volume is large). Return to Sohu to see more Responsible Editor:. wt-dthtools.com
