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1987年沈阳市兴建了珠江街高架立交桥。该桥横跨沈丹、沈吉两条铁路干线,桥长1.16km。除引道外,高架部分长512m,桥宽12m,跨高11.2m。桥板系预制空心板,板长16m,宽1.01m,高70cm,孔形系16m长两端断面窄、中间断面宽的空心,制作难度较大(见图1)。如采用木制箱形模板,以使用最薄木板1.5cm厚计算,每个内芯需板材0.96m~3,支撑用材0.29m~3,由于成型后无法取出,或虽能部分取出,但木材已被损坏,基本不能重复利用。经多次研究和试验,最后采用了活动支
In 1987, the Zhujiang Street elevated overpass was built in Shenyang. The bridge spans two railway lines, Shendan and Shenji. The bridge is 1.16km long. Except for the approach road, the elevated part is 512m long, the bridge is 12m wide and the height is 11.2m. The bridge plate is made of prefabricated hollow slabs, with a plate length of 16m, a width of 1.01m and a height of 70cm. The boreholes are 16m long and have a hollow section with a narrow end section and a wide middle section, making it difficult to make (see Figure 1). If a wooden box formwork is used, the thickness of the thinnest wood board shall be 1.5cm, and each core needs 0.96m~3 plates and 0.29m~3 support materials. Since it cannot be removed after molding, or it can be partially removed, the wood Has been damaged, basically can not be reused. After many studies and experiments, the activity branch was finally adopted.