大跨度预应力混凝土连续箱梁长期下挠和开裂加固技术

摘要

In view of the diseases of long-term deflection and cracks at the bottom and Web concrete of the large span prestressed concrete continuous box girder in operation,the reinforcing method combining external prestressing with light-weight concrete load reduction has been briefly introduced.%针对大跨度预应力混凝土连续箱梁在运营期间出现的长期下挠及底板、腹板混凝土开裂等病害,简要介绍了体外预应力和轻质混凝土减载相结合的加固方案。