Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method of cast-in-place underpass bridge under existing line
The invention belongs to the technical field of underpass bridges, and particularly provides a construction method of a cast-in-place underpass bridge under an existing line. An overhead temporary bridge is mounted on an existing railway track, so that a railway line is fixed on the temporary bridge, the line is ensured to be smooth, and interference on the railway in the subsequent construction process is effectively avoided. Then a step-by-step groove jumping method is adopted for conducting groove broaching on an existing railway roadbed, an overhead fulcrum is constructed after a waterproof curtain is constructed, line overhead is conducted through a fulcrum changing method, and a firm overhead system is formed; after the existing roadbed is reinforced, the tunnel frame bridge is cast in situ under the existing line, and the problems that when the tunnel bridge is built on a soft foundation or under the geological condition rich in confined water, hole digging fulcrum piles cannot be constructed, and the existing roadbed cannot be reinforced are solved.
本发明属于地道桥技术领域，具体提供了一种既有线下现浇地道桥的修建方法，在现有铁路轨道上安装架空便桥，使铁路线路固定在便桥之上，保证线路通畅，有效避免后续施工过程中对铁路的干扰，然后采用分步跳槽法对既有铁路路基进行拉槽，施工止水帷幕后施工架空支点，通过变换支点的方法进行线路架空，形成牢固的架空体系；对既有路基进行加固处理后，在既有线下现浇地道框架桥，解决了地道桥在软弱地基或者富含承压水的地质条件下修建地道桥时，无法施工挖孔支点桩，无法加固既有路基的问题。
Construction method of cast-in-place underpass bridge under existing line
The invention belongs to the technical field of underpass bridges, and particularly provides a construction method of a cast-in-place underpass bridge under an existing line. An overhead temporary bridge is mounted on an existing railway track, so that a railway line is fixed on the temporary bridge, the line is ensured to be smooth, and interference on the railway in the subsequent construction process is effectively avoided. Then a step-by-step groove jumping method is adopted for conducting groove broaching on an existing railway roadbed, an overhead fulcrum is constructed after a waterproof curtain is constructed, line overhead is conducted through a fulcrum changing method, and a firm overhead system is formed; after the existing roadbed is reinforced, the tunnel frame bridge is cast in situ under the existing line, and the problems that when the tunnel bridge is built on a soft foundation or under the geological condition rich in confined water, hole digging fulcrum piles cannot be constructed, and the existing roadbed cannot be reinforced are solved.
本发明属于地道桥技术领域，具体提供了一种既有线下现浇地道桥的修建方法，在现有铁路轨道上安装架空便桥，使铁路线路固定在便桥之上，保证线路通畅，有效避免后续施工过程中对铁路的干扰，然后采用分步跳槽法对既有铁路路基进行拉槽，施工止水帷幕后施工架空支点，通过变换支点的方法进行线路架空，形成牢固的架空体系；对既有路基进行加固处理后，在既有线下现浇地道框架桥，解决了地道桥在软弱地基或者富含承压水的地质条件下修建地道桥时，无法施工挖孔支点桩，无法加固既有路基的问题。
Construction method of cast-in-place underpass bridge under existing line
一种既有线下现浇地道桥的修建方法
HUANG GUANGHUI (Autor:in) / ZHANG FENG (Autor:in) / QIN YEYAN (Autor:in) / XIAO YAO (Autor:in) / ZOU XIANGNONG (Autor:in) / HAN XIAOMIN (Autor:in) / LIU QIANQIAN (Autor:in)
16.07.2021
Patent
Elektronische Ressource
Chinesisch
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