铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2015年
7期
124-127
,共4页
铁路隧道%斜井%纵坡%超前钻孔排水%施工
鐵路隧道%斜井%縱坡%超前鑽孔排水%施工
철로수도%사정%종파%초전찬공배수%시공
Railway tunnel%Inclined shaft%Profile grade%Drainage by advanced borehole%Construction
某铁路隧道在斜井的施工中，遇到地下水发育的情况，围岩以碎石土为主，含泥量高。原设计采用帷幕注浆及超前小导管注浆，实际注浆效果不明显，施工中突水突泥严重，造成出渣困难，严重影响施工进度。针对此情况，提出调整斜井纵坡、增设超前水平钻孔排水等优化方案，加快斜井施工，使斜井能满足辅助正洞施工的要求，进而满足总工期要求。实践证明，优化方案效果良好。
某鐵路隧道在斜井的施工中，遇到地下水髮育的情況，圍巖以碎石土為主，含泥量高。原設計採用帷幕註漿及超前小導管註漿，實際註漿效果不明顯，施工中突水突泥嚴重，造成齣渣睏難，嚴重影響施工進度。針對此情況，提齣調整斜井縱坡、增設超前水平鑽孔排水等優化方案，加快斜井施工，使斜井能滿足輔助正洞施工的要求，進而滿足總工期要求。實踐證明，優化方案效果良好。
모철로수도재사정적시공중，우도지하수발육적정황，위암이쇄석토위주，함니량고。원설계채용유막주장급초전소도관주장，실제주장효과불명현，시공중돌수돌니엄중，조성출사곤난，엄중영향시공진도。침대차정황，제출조정사정종파、증설초전수평찬공배수등우화방안，가쾌사정시공，사사정능만족보조정동시공적요구，진이만족총공기요구。실천증명，우화방안효과량호。
During the construction of the inclined shaft of a railway tunnel, the groundwater was found well-developed, and the surrounding rock was of mainly gravel soil with high clay content. Though the original design intended to use curtain grouting and advanced small ductile grouting, the site grouting effect was not obvious as expected. Water and mud bursting were serious during the construction, and brought negative effects to slag-out, and serious influence on the construction progress. In view of this situation, some optimization programs such as adjusting the profile grade of inclined shaft, adding advanced horizontal borehole to drain the water were put up to accelerate the construction of gallery, so as to enable the gallery to assist the tunnel construction and meet the progress schedule. Practices have well proved the efficiency of the optimization programs.
