Research On Construction Technology Of Shijiazhuang Six-line Tunnel

In Shijiazhuang, streamline the tunnel as the background, considering the complex terrain of local area is located in the sedimentary sag traffic, traffic congestion and adverse factors such as local variety and concentrated rainfall six line tunnel construction are analyzed in detail and the difficulty of customer service, expounds the important role of China’s rail network.Attaches great importance to the basement in roadbed protection, processing and special soil subgrade for processing technology, due to the complexity of geological conditions of excavation to slip down when serious. Therefore, adopts double multiple-arch large-span shallow buried wearing Ying Yexian soft soil, underground tunnel construction technology combined with six line tunnel engineering practice, the construction method of soil nailing for slope protection to ensure smoothly, and will double side heading method. CRD method excavation technology is applied to engineering, such as overcame many problems in engineering.The next wears away the stone is too straight line subgrade in underground tunnel construction, mainly adopted fore pole, initial support two kinds of forms. Fore pole consists of double-layer pipe roof in advance, advance ductile, full constraints grouting reinforce men measures, such as primary support including sprayed concrete, steel, steel anchor pipe and lock foot, steel mesh, such as content, effectively solve the question of the support. Will 6 line in tunnel engineering problems and the solution in detail in this paper, the out, provide good reference for the industry concerned.