浅埋暗挖隧道穿越填石区地表沉降控制
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摘要
厦门城市轨道交通1号线城市广场站—塘边站浅埋暗挖区间采用矿山法施工,由于隧道穿越地质条件复杂的填石区地表沉降难以控制。仅采取喷射混凝土封闭掌子面、注浆加固、加强超前支护措施累计地表沉降接近70 mm;而采取地表高压旋喷桩超前加固,洞内全断面帷幕注浆、双层小导管超前支护等多种措施,能将地表沉降控制在5 mm以内。据此提出了地表高压旋喷桩超前加固、全断面帷幕注浆、双层小导管超前支护、长管棚初期支护和拱脚加固施工方法。经实施效果良好。研究成果能为城市浅埋暗挖隧道穿越填石区提供参考。
Shallow-buried underground excavation interval section between City Square Station and Tangbian Station of Xiamen urban rail transit Line 1 was constructed by mining method.It is diff icult to control the ground surface settlement of the tunnel crossing the rock-filling area in complex geological conditions.The cumulative ground surface settlement is close to 70 mm only by means of shotcrete sealing tunnel face,grouting reinforcement and strengthening advanced support.The ground surface settlement can be controlled within 5 mm by adopting many measures,such as advanced reinforcement with ground high-pressure jet grouting pile,full-section curtain grouting in tunnel and advance support of double-layer small conduit and so on.Based on these methods,the construction methods of advanced reinforcement with ground high-pressure jet grouting pile,full-section curtain grouting,advance support of double-layer small conduit,primary support of long pipe shed and arch foot reinforcement were put forward and the implementation effect is good,the research result of which can provide references for shallow-buried underground excavation tunnel crossing the rock-filling area in cities.
Shallow-buried underground excavation interval section between City Square Station and Tangbian Station of Xiamen urban rail transit Line 1 was constructed by mining method.It is diff icult to control the ground surface settlement of the tunnel crossing the rock-filling area in complex geological conditions.The cumulative ground surface settlement is close to 70 mm only by means of shotcrete sealing tunnel face,grouting reinforcement and strengthening advanced support.The ground surface settlement can be controlled within 5 mm by adopting many measures,such as advanced reinforcement with ground high-pressure jet grouting pile,full-section curtain grouting in tunnel and advance support of double-layer small conduit and so on.Based on these methods,the construction methods of advanced reinforcement with ground high-pressure jet grouting pile,full-section curtain grouting,advance support of double-layer small conduit,primary support of long pipe shed and arch foot reinforcement were put forward and the implementation effect is good,the research result of which can provide references for shallow-buried underground excavation tunnel crossing the rock-filling area in cities.
引文
[1]傅鹤林,袁磊,邓新武.填土围岩中浅埋暗挖隧道开挖方法研究[J].铁道科学与工程学报,2018,15(10):2583-2589.
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[4]黄俊,张顶立,陈来生.富水软弱地层地铁隧道浅埋暗挖施工技术[J].岩土工程技术,2004,18(6):295-298.
[5]孙飞,李金奎.人工素填土下浅埋暗挖横通道CRD法施工的地表沉降监测分析[J].现代隧道技术,2012,49(1):148-151.
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[7]李炜明,任虹,柳雨叶,等.短时强降水对地铁车站明挖施工引起的地表沉降与结构变形的影响[J].铁道建筑,2018,58(7):80-82,120.
[8]代维达.北京地铁6号线浅埋暗挖法车站施工地表沉降规律研究[J].铁道建筑,2014,54(4):63-67.
[9]冯雷.浅埋暗挖法隧道施工技术及地面沉降控制[J].智能城市,2017,3(8):185.
[10]李宏安,李梁,梁俊峰.止水帷幕搅喷桩在地铁车站施工中的应用研究[J].铁道建筑,2015,55(2):82-84.
[11]王霆,刘维宁,张成满,等.地铁车站浅埋暗挖法施工引起地表沉降规律研究[J].岩石力学与工程学报,2007,26(9):1855-1861.
[12]黄合理.地铁隧道穿越既有车站的沉降预测及加固措施[J].现代隧道技术,2013,50(2):114-118.
[2]邱翀.浅埋暗挖法隧道施工技术及地面沉降控制[J].建筑技术开发,2018,45(18):42-43.
[3]曹新海,张海丰.浅埋暗挖隧道下穿道路施工及监测技术探讨[J].工程质量,2018,36(8):52-55,66.
[4]黄俊,张顶立,陈来生.富水软弱地层地铁隧道浅埋暗挖施工技术[J].岩土工程技术,2004,18(6):295-298.
[5]孙飞,李金奎.人工素填土下浅埋暗挖横通道CRD法施工的地表沉降监测分析[J].现代隧道技术,2012,49(1):148-151.
[6]吴应明.地铁浅埋暗挖隧道地层沉降因素及控制对策[J].城市轨道交通研究,2013,6(4):64-67.
[7]李炜明,任虹,柳雨叶,等.短时强降水对地铁车站明挖施工引起的地表沉降与结构变形的影响[J].铁道建筑,2018,58(7):80-82,120.
[8]代维达.北京地铁6号线浅埋暗挖法车站施工地表沉降规律研究[J].铁道建筑,2014,54(4):63-67.
[9]冯雷.浅埋暗挖法隧道施工技术及地面沉降控制[J].智能城市,2017,3(8):185.
[10]李宏安,李梁,梁俊峰.止水帷幕搅喷桩在地铁车站施工中的应用研究[J].铁道建筑,2015,55(2):82-84.
[11]王霆,刘维宁,张成满,等.地铁车站浅埋暗挖法施工引起地表沉降规律研究[J].岩石力学与工程学报,2007,26(9):1855-1861.
[12]黄合理.地铁隧道穿越既有车站的沉降预测及加固措施[J].现代隧道技术,2013,50(2):114-118.