This paper dlescribes the advantage of pre fabricated beam with box cross section to erect as a simple support beam which is used in Qinshen passenger railway with different bridge erecting machine.It points out the n...This paper dlescribes the advantage of pre fabricated beam with box cross section to erect as a simple support beam which is used in Qinshen passenger railway with different bridge erecting machine.It points out the necessary to produce beam with pretensioned method.展开更多
文摘This paper dlescribes the advantage of pre fabricated beam with box cross section to erect as a simple support beam which is used in Qinshen passenger railway with different bridge erecting machine.It points out the necessary to produce beam with pretensioned method.
