|
Abstract Research purposes: To the excavation of sectional tunnel with multiple canes, the different excavation subsequences have the different poured stresses and folded routs, resulting in different results. Especially when conducting construction very soon, the stratum change caused by the excavation directly influences the displacement and deformation of existing structure, so it is very important to do research on the excavation subsequence of sectional tunnel with multiple zones. Taking subsurface excavation of Guoshuang Section of Line 10 of Beijing metro underpass the existing Line 1 as an example, this paper introduces the application of multiple-goal planning theory in optimizing the excavation subsequence of tunnel.
Research results:Through calculating and optimizing the excavation subsequence with multiple-goal planning theory, and taking many rational technical measures , the subsidence of the existing Line 1 under-passed by Line 10 in Guoshuang Section is effectively controlled and the max. subsidence value is 4. 83 mm, which is less than the limitation value of 5 mm and guarantees the construction safety and normal operation of existing Line 1.
|
2008, Vol. 25 
