杯型水平冻结法端头加固与钢套筒辅助的盾构接收技术
|
摘要
盾构接收是复杂软弱富含水地层盾构施工的关键风险点。针对某地铁车站端头隧道施工中所遇到的特殊工程地质条件,提出并采用了杯型水平冻结法端头加固与钢套筒辅助的盾构接收施工工艺。采用工程应用与实测相结合的研究方法,对水平冻结加固区的温度以及盾构接收期间地表沉降进行了现场实测研究。分析了冻结壁温度变化规律,判断安装和切割钢套筒时机,确保了钢套筒顺利切割。总结了软弱富含水地层钢套筒盾构接收技术的特点及难点,有效地避免了盾构接收过程中涌水、涌砂的风险,保障了盾构的安全接收。
Shield receiving is the key risk point during shield construction in soft water-rich soil. According to the special engineering geological conditions of a subway station,the construction technology of horizontal freezing reinforcement and steel sleeve assisted shield construction is proposed. This freezing construction technology and the ground subsidence during the shield receiving are studied by using engineering application and field measurement. The law of the freezing soil wall thermal field is analyzed to judge the time of installing and the cutting of steel sleeve for smooth shield receiving. The specific process and the key technology of shield receiving in soft water-rich soil are summarized,in order to avoid the risk of water gushing and sand pouring in the process of shield receiving effectively.
Shield receiving is the key risk point during shield construction in soft water-rich soil. According to the special engineering geological conditions of a subway station,the construction technology of horizontal freezing reinforcement and steel sleeve assisted shield construction is proposed. This freezing construction technology and the ground subsidence during the shield receiving are studied by using engineering application and field measurement. The law of the freezing soil wall thermal field is analyzed to judge the time of installing and the cutting of steel sleeve for smooth shield receiving. The specific process and the key technology of shield receiving in soft water-rich soil are summarized,in order to avoid the risk of water gushing and sand pouring in the process of shield receiving effectively.
引文
[1]YANG P,KE J M,WANG J G,et al.Numerical simulation of frost heave with coupled water freezing temperature and stress fields in tunnel excavation[J].Computer and Geotechnics,2006(33):6-7.
[2]YANG P,ZHU F B.Application of freezing method to recover tunnel accident in complex stratum of nanjing subway[M].Singapore:World Scientific Publishing Company,2005:1.
[3]秦爱芳,李永和.人工土层冻结法加固在盾构出洞施工中的应用[J].岩土力学,2004,25(S2):449-452.
[4]佘占奎,黄宏伟,王如路,等.人工冻结技术在上海地铁施工中的应用[J].冰川冻土,2005,27(4):550-556.
[5]杨平,袁云辉,佘才高,等.南京地铁集庆门盾构隧道进洞端头人工冻结加固温度实测[J].解放军理工大学学报(自然科学版),2009(6):591-596.
[6]王杰,杨平等,王许诺,等.盾构始发水泥土加固后水平冻结温度实测研究[J].现代隧道技术,2011(12):99-103.
[7]袁云辉,杨平,王海波.人工水平冻结冻土帷幕强制解冻温度场数值分析[J].南京林业大学学报(自然科学版),2011,35(4):117-120.
[8]苗立新,齐修东,邹超.冻结法在盾构接收端头土体加固中的应用[J].铁道工程学报,2013,37(3):145-151.
[9]逯建栋.盾构到达钢套筒接收施工技术[J].广东土木与建筑,2011(10):45-47.
[10]夏晨欢.盾构进洞钢套筒施工技术的研究[J].建筑施工,2013(1):69-71.
[11]贲志江,杨平,张旭辉,等.地铁过江隧道大型泥水盾构接收方式研究[J].铁道建筑,2014(11):61-64.
[12]贲志江,杨平,陈长江,等.地铁过江隧道大型泥水盾构的水中接收技术[J].南京林业大学报(自然科学版),2015,39(1):119-124.
[13]郑石,鞠世健.泥水平衡盾构到达钢套筒辅助接收施工技术[J].现代隧道技术,2010(12):51-56.
[14]陈珊东.盾构到达接收辅助装置的使用分析[J].隧道建设,2010(8):492-494.
[15]贺卫国.盾构在地面局部封闭条件下钢套筒接收技术[J].施工技术,2015,44(17):109-112.
[2]YANG P,ZHU F B.Application of freezing method to recover tunnel accident in complex stratum of nanjing subway[M].Singapore:World Scientific Publishing Company,2005:1.
[3]秦爱芳,李永和.人工土层冻结法加固在盾构出洞施工中的应用[J].岩土力学,2004,25(S2):449-452.
[4]佘占奎,黄宏伟,王如路,等.人工冻结技术在上海地铁施工中的应用[J].冰川冻土,2005,27(4):550-556.
[5]杨平,袁云辉,佘才高,等.南京地铁集庆门盾构隧道进洞端头人工冻结加固温度实测[J].解放军理工大学学报(自然科学版),2009(6):591-596.
[6]王杰,杨平等,王许诺,等.盾构始发水泥土加固后水平冻结温度实测研究[J].现代隧道技术,2011(12):99-103.
[7]袁云辉,杨平,王海波.人工水平冻结冻土帷幕强制解冻温度场数值分析[J].南京林业大学学报(自然科学版),2011,35(4):117-120.
[8]苗立新,齐修东,邹超.冻结法在盾构接收端头土体加固中的应用[J].铁道工程学报,2013,37(3):145-151.
[9]逯建栋.盾构到达钢套筒接收施工技术[J].广东土木与建筑,2011(10):45-47.
[10]夏晨欢.盾构进洞钢套筒施工技术的研究[J].建筑施工,2013(1):69-71.
[11]贲志江,杨平,张旭辉,等.地铁过江隧道大型泥水盾构接收方式研究[J].铁道建筑,2014(11):61-64.
[12]贲志江,杨平,陈长江,等.地铁过江隧道大型泥水盾构的水中接收技术[J].南京林业大学报(自然科学版),2015,39(1):119-124.
[13]郑石,鞠世健.泥水平衡盾构到达钢套筒辅助接收施工技术[J].现代隧道技术,2010(12):51-56.
[14]陈珊东.盾构到达接收辅助装置的使用分析[J].隧道建设,2010(8):492-494.
[15]贺卫国.盾构在地面局部封闭条件下钢套筒接收技术[J].施工技术,2015,44(17):109-112.