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The construction drawing design of the right line in gui kai

highway du xi tunnel

Abstract: The Duxi tunnel from Guiyang to Kaiyang is an ascending-descending

separation bidirectional four vehicle traffic lanes priest tunnel, which locates at Duxi village Dulayin town in the Guiyang Baiyun District ,this tunnel is important transportation route from Guiyang to Kaiyang. According to the request of present highway tunnel design standard and the design project description', this design only carries on tunnel right line construction drawing design from Guiyang to Kaiyang, whose highway design rank is the highway, the design speed is 80km/h, and the tunnel span 1215m. In the term of lining work structure computation, the hole figure mainly uses composite lining, the primary supports and protections use the elasto-plasticity theory (stratal configuration law) , conside the nteraction between stratum and country rock, and adopt the design and cayulation of shotcrete-anchorage support; Secondary lining carries on the structure endogenic force analysis using the finite element software and carrIes on the reinforcing bars and the checking calculation based on the analysis results. In the tunnel portal design aspect,

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having fully considered the terrain of tunnel openning , the geological situation, the end of Guiyang section tunnel uses the end wall type portal, the Kaiyang¡¯s end uses the wing wall type portal. The tunnel ventilation uses longitudinal ventilation of the jet flow type; The illumination uses the sodium lamp illumination. In the draining water aspect, the design deals with the question of the underground water following the principle of the truncation, stops up, the platoon. In the construction aspect, the design uses NATM tunnel technology,excavates from the both sides of portal .carries on partition construction basied on the different adjacent formation rank, the construction function mainly adopts the excavation method of unidirectional sidewall guiding hole, benching tunnelling method, as well as perimeter blasting, and carries on the reasonable construction organization plan.

keyword£ºtunnel£»composite lining£»tunnel portal£»NATM

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