安徽地质
安徽地質
안휘지질
GEOLOGY OF ANHUI
2014年
1期
56-59
,共4页
定向钻%穿越技术%清江河%天然气管道%敷设%应用
定嚮鑽%穿越技術%清江河%天然氣管道%敷設%應用
정향찬%천월기술%청강하%천연기관도%부설%응용
directional drilling%crossing technique%Qingjiang river%natural gas pipeline%laying%application
清江河天然气管道工程是在河床下穿越1500多米的Φ1016×26.2天然气钢管和Φ114硅管套管。该河为通航河道，河底地面高程最低-5.90m左右，最大水深6.0～8.6m。地层为填土、淤泥质粘粉土、淤泥质粉砂、粉质粘土夹粉砂细砂。施工中通过优化施工方案，针对导向孔轨迹控制、淤泥地层定向钻进纠偏、大口径扩孔清孔和长输大口径管道回拖采取了一些有效的技术措施，确保了工程一次性回拖成功。
清江河天然氣管道工程是在河床下穿越1500多米的Φ1016×26.2天然氣鋼管和Φ114硅管套管。該河為通航河道，河底地麵高程最低-5.90m左右，最大水深6.0～8.6m。地層為填土、淤泥質粘粉土、淤泥質粉砂、粉質粘土夾粉砂細砂。施工中通過優化施工方案，針對導嚮孔軌跡控製、淤泥地層定嚮鑽進糾偏、大口徑擴孔清孔和長輸大口徑管道迴拖採取瞭一些有效的技術措施，確保瞭工程一次性迴拖成功。
청강하천연기관도공정시재하상하천월1500다미적Φ1016×26.2천연기강관화Φ114규관투관。해하위통항하도，하저지면고정최저-5.90m좌우，최대수심6.0～8.6m。지층위전토、어니질점분토、어니질분사、분질점토협분사세사。시공중통과우화시공방안，침대도향공궤적공제、어니지층정향찬진규편、대구경확공청공화장수대구경관도회타채취료일사유효적기술조시，학보료공정일차성회타성공。
The qingjiang River natural gas pipeline project is laying 1500m long Φ1016×26.2 natural gas steel pipe andΦ114 silica casing across the river beneath the riverbed. The river is open to navigation, with river bottom elevation at a minimum of -5.90m and water depth at a maximum of 6.0-8.6m. The strata consist of land fills, sludge silt, silty clay intercalated with silt and fine sand. After optimizing construction scheme, some effective technical measures have been taken in lead hole trail control, directional drilling deviation correction, big-size hole reaming and clearing, and long-distance big-size pipeline back-dragging, which ensured success of back dragging at one time.
