铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2014年
6期
89-92
,共4页
铁路桥%承台%钢板桩围堰%施工
鐵路橋%承檯%鋼闆樁圍堰%施工
철로교%승태%강판장위언%시공
railway bridge%bearing platform%steel sheet-pile cofferdam%construction
结合钢板桩围堰在某铁路桥施工中的应用，针对施工现场河道冲刷层厚、其下有2~3m厚硬塑状黏土层的特点，为避免河床表面松散粉沙地质层受水流冲刷对施工造成影响，以及节约使用封底混凝土的原则，将钢板桩超长处理，达到围堰内清淤，不进行水下封底，直接抽干围堰内水后，浇筑20 cm厚混凝土垫层就可施工下道工序的目的，加快了工期，节省了资源，保证了质量。
結閤鋼闆樁圍堰在某鐵路橋施工中的應用，針對施工現場河道遲刷層厚、其下有2~3m厚硬塑狀黏土層的特點，為避免河床錶麵鬆散粉沙地質層受水流遲刷對施工造成影響，以及節約使用封底混凝土的原則，將鋼闆樁超長處理，達到圍堰內清淤，不進行水下封底，直接抽榦圍堰內水後，澆築20 cm厚混凝土墊層就可施工下道工序的目的，加快瞭工期，節省瞭資源，保證瞭質量。
결합강판장위언재모철로교시공중적응용，침대시공현장하도충쇄층후、기하유2~3m후경소상점토층적특점，위피면하상표면송산분사지질층수수류충쇄대시공조성영향，이급절약사용봉저혼응토적원칙，장강판장초장처리，체도위언내청어，불진행수하봉저，직접추간위언내수후，요축20 cm후혼응토점층취가시공하도공서적목적，가쾌료공기，절성료자원，보증료질량。
This paper was base on an example of steel sheet-pile cofferdam used in the construction of a certain railway bridge. The construction site was characterized by a thick river channel erosion layer which is followed below by a layer of 2 m to 3 m thick hard plastic clay. In order to protect the construction from negative influence caused by water current scouring the loose mealy sand stratum of river bed surface, also in order to save bottom-sealing concrete, the steel sheet piles were made into extra-long ones longer than being designed. As a result, the aim was reached: after dredging within the cofferdam, the water within the cofferdam was able to be directly pumped out without having to do underwater bottom-sealing, only followed by casting a 20 cm thick concrete cushion for the next work procedure. It can be seen that this construction technology has helped to shorten construction time, save resource and ensure construction quality.
