Research on Node Scheme of Zhuhai Doumen Airport North Express Undercrossing Expressway
Taking the node of airport north express under-crossing the western coastal expressway as an example,the proposed airport north express intersects with the cur-rent western coastal expressway,and the western coastal expressway reserves bridge holes for the airport north ex-press.The foundation of the proposed section is soft foun-dation.If the node is not handled properly,the subgrade filling will exert lateral force on the current bridge piers,or the post-construction settlement will exert negative friction resistance on bridge piers.Therefore,it is particu-larly important to formulate a reasonable and economical node scheme.Combined with the construction conditions,a variety of undercrossing schemes are proposed.It is rec-ommended to pass through the existing bridge holes in the form of subgrade,and use the in-situ curing method to treat the soft foundation.This scheme can provide refer-ence for similar projects.
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