Post-tensioning method prestressed concrete excavation and cast-in-place tunnel construction process

The invention relates to the field of building construction and discloses a post-tensioning method prestressed concrete excavation and cast-in-place tunnel construction process. According to the construction process, prestressed steel strands are arranged in a structural roof and a structural base slab of a concrete large-span tunnel to improve the bearing capacity of a structure. Through the reasonably designed post-tensioning method prestressed concrete excavation and cast-in-place tunnel construction process, the span capacity of the structure can be improved, the self-weight of the structure can be reduced, materials can be saved, the thickness of the structure can be reduced, and the manufacturing cost can be effectively saved. Meanwhile, the bearing capacity of the structure is improved. 本发明涉及建筑施工领域，公开了种后张法预应力混凝土明挖现浇隧道施工工艺，施工工艺为在混凝土大跨径隧道结构顶板、结构底板中设置预应力钢束提高结构承载力；经过合理设计的后张法预应力混凝土明挖现浇隧道施工工艺，能实现增加结构跨越能力，减轻结构自重，节省材料，降低结构厚度，可以有效节约造价，同时提结构承载能力。