软土地区既有地下通道加固改造与地铁车站连接技术

Connection Technology Between Existing Underpass Reinforcement and Subway Station in Soft Soil Area

地铁车站与既有的城市地下过街通道进行互联互通,可以充分整合地下空间资源,将独立的地下空间形成有机整体,发挥最大的社会效益。宁波市轨道交通1号线一期工程东门口站位于市区中心,为地下3层岛式车站,既有的日新街地下过街通道位于车站东端,距离车站7.5~10.0m,车站地下1层、地下2层与地下通道进行连接,可以方便乘客出行。连接施工过程中,如何保证既有通道的安全和正常通行是本工程的实施难点。通过采取地下通道两侧设置绑桩和绑梁,通道顶板结构加厚,微扰动地基加固等加固改造措施,顺利完成了车站与既有过街通道的连接。

The inter connectivity of metro station and the existing urban underground passageway can integrate the underground space resources, which can maximize the social benefit. The Dongmenkou Station in the city center is an underground station of three layers in the Line 1 of Ningbo rail transit, and the existing Rixin Street underground passageway is located at the east side of the station, just 7.5~10.0 metres away. By connecting the first and second underground floors of the station with the existing underground passageway, it provides great convenience for the passengers. During the construction process, it is difficult to ensure the safety of the passageway and the normal traffic in the passageway. By setting the binding piles and beams on the two sides of the underground passageway, thickening the roof of the passageway structure, adopting weak perturbation foundation reinforcement and so on, the connection of the metro station and the existing underground passageway is completed successfully, which provides experience for the construction of similar engineering.