冻结工法在富集海水地层下地铁联络通道施工中的应用研究
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摘要
海水成分复杂致使海域地层冻土力学特性及温度变化规律不同于淡水地层。基于海下隧道的修建逐渐增多且冻结法在海域环境中的应用少,开展了海域复杂环境下联络通道冻结施工温度场变化规律研究。依托国内首条海底地铁隧道——厦门轨道交通2号线,研究富集海水地层下地铁联络通道施工技术,通过对比分析了不同位置、不同深度测温孔温度分布特征,确定了"喇叭口"位置受隧道内部环境影响的范围,冻结帷幕内、外侧边缘冻结发展特点;对比深、浅测温孔数据表明泵站处冻结帷幕边缘温度沿冻结管轴向呈"W"形状分布,指出了可能存在包括两侧"喇叭口"和泵站位置中部在内的3处主要冻结薄弱区;对比分析了积极冻结期间3次不同时段、不同持续时间长度盐水温度回升对冻结加固效果的影响情况。研究成果揭示了海底隧道联络通道冻结温度场变化规律,对今后海底冻结施工具有重要的借鉴意义。
The complex composition of seawater causes the mechanical properties and temperature changes of the frozen soil in the sea layer to be very different from the freshwater stratum. The construction of tunnels under sea has been gradually increasing, however only a few freezing methods were applied in the marine environment. In this paper, the variation law of temperature field in the freezing construction of the connecting aisle in the complex environment of the sea area was analyzed. Taking Xiamen rail transit line 2 as an example, which is the first subsea subway tunnel in China, the construction technology of subway connecting aisle under the enriched seawater stratum is studied, determine the range of the "horn mouth" position affected by the internal environment of the tunnel, and the characteristics of freezing development in the inner and outer edges of the frozen curtain were determined. Comparing the data of deep and shallow temperature measurement holes, the temperature of the frozen curtain edge at the pumping station is distributed in the shape of "W" along the axial direction of the freezing tube, indicating that there may be three main parts including the "horn mouth" on both sides and the middle of the pumping station. The effects of three times of salt water temperature rise on different periods of time and different lengths of time on the freezing and strengthening effect were compared and analyzed. The research results reveal the change law of freezing temperature field in the connecting aisle of the subsea tunnel, which has important reference significance for the future subsea freezing construction.
The complex composition of seawater causes the mechanical properties and temperature changes of the frozen soil in the sea layer to be very different from the freshwater stratum. The construction of tunnels under sea has been gradually increasing, however only a few freezing methods were applied in the marine environment. In this paper, the variation law of temperature field in the freezing construction of the connecting aisle in the complex environment of the sea area was analyzed. Taking Xiamen rail transit line 2 as an example, which is the first subsea subway tunnel in China, the construction technology of subway connecting aisle under the enriched seawater stratum is studied, determine the range of the "horn mouth" position affected by the internal environment of the tunnel, and the characteristics of freezing development in the inner and outer edges of the frozen curtain were determined. Comparing the data of deep and shallow temperature measurement holes, the temperature of the frozen curtain edge at the pumping station is distributed in the shape of "W" along the axial direction of the freezing tube, indicating that there may be three main parts including the "horn mouth" on both sides and the middle of the pumping station. The effects of three times of salt water temperature rise on different periods of time and different lengths of time on the freezing and strengthening effect were compared and analyzed. The research results reveal the change law of freezing temperature field in the connecting aisle of the subsea tunnel, which has important reference significance for the future subsea freezing construction.
引文
[1] 付财,韩圣铭,韩玉福.浅覆土条件下地铁出入口冻结法暗挖施工技术[J].施工技术,2014,43(7):91-93.
[2] 肖朝昀,胡向东,张庆贺.地铁修复工程中冻结法设计[J].岩土工程学报,2006,28(S1):1716-1719.
[3] 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,2011(9):105-109.
[4] 雷军,白明洲,许兆义,等.地铁隧道施工期冻结法穿越断层破碎带施工效果现场试验研究[J].岩石力学与工程学报,2008,27(7):1492-1498.
[5] 王晖,竺维彬,李大勇.富水砂层中联络通道施工工法及其控制措施[J].铁道工程学报,2010(9):82-87.
[6] 黄奇兵,张坚,曹宁全,等.西安地铁联络通道冻结法施工工艺及数值分析[J].南昌工程学院学报,2018,37(3):19-23.
[7] 孙成伟,仇佩云.广州地铁隧道联络通道冻结法施工技术研究[J].现代隧道技术,2012,49(3):6-8.
[8] 邵国鑫.宁波软土层地铁盾构隧道联络通道的冻结法设计与施工[J].工业建筑,2013,43(11):147-152.
[9] 杨太华.越江隧道工程联络通道冻结法施工风险分析[J].地下空间与工程学报,2010,6(6):1201-1206.
[10] 李开文,毛勇,孙闯,等.越江隧道联络通道冻结法施工力学模拟分析[J].长江科学院院报,2011,28(7):57-61.
[11] 王彦洋,唐华瑞,李顺群,等.考虑温度梯度变化的地铁联络通道冻结施工三维数值模拟[J].现代隧道技术,2015,52(6):135-140.
[12] 李大勇,陈福全,张庆贺.地铁联络通道冻结施工的三维数值模拟[J].岩土力学,2004,25(S1):472-474.
[13] 徐黎明,陈晓坚,彭正勇,等.海底隧道联络通道冻结法施工健康监测技术研究[J].隧道建设(中英文),2018,38(2):295-299.
[14] 谷佳瑞,王仲刚.海水集料混凝土的研究进展[J].水利与建筑工程学报,2017,15(4):58-61,106.
[15] 刘旭辉,陈小明,黄海杨,等.海洋环境中活塞杆两种喷涂防腐技术测试报告分析和工程应用初探[J].水利与建筑工程学报,2019,17(1):108-112,118.
[16] 胡建平,董教社,冯蓓蕾.聚合物海水泥浆的研制[J].探矿工程(岩土钻掘工程),2012,39(12):29-31.
[2] 肖朝昀,胡向东,张庆贺.地铁修复工程中冻结法设计[J].岩土工程学报,2006,28(S1):1716-1719.
[3] 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,2011(9):105-109.
[4] 雷军,白明洲,许兆义,等.地铁隧道施工期冻结法穿越断层破碎带施工效果现场试验研究[J].岩石力学与工程学报,2008,27(7):1492-1498.
[5] 王晖,竺维彬,李大勇.富水砂层中联络通道施工工法及其控制措施[J].铁道工程学报,2010(9):82-87.
[6] 黄奇兵,张坚,曹宁全,等.西安地铁联络通道冻结法施工工艺及数值分析[J].南昌工程学院学报,2018,37(3):19-23.
[7] 孙成伟,仇佩云.广州地铁隧道联络通道冻结法施工技术研究[J].现代隧道技术,2012,49(3):6-8.
[8] 邵国鑫.宁波软土层地铁盾构隧道联络通道的冻结法设计与施工[J].工业建筑,2013,43(11):147-152.
[9] 杨太华.越江隧道工程联络通道冻结法施工风险分析[J].地下空间与工程学报,2010,6(6):1201-1206.
[10] 李开文,毛勇,孙闯,等.越江隧道联络通道冻结法施工力学模拟分析[J].长江科学院院报,2011,28(7):57-61.
[11] 王彦洋,唐华瑞,李顺群,等.考虑温度梯度变化的地铁联络通道冻结施工三维数值模拟[J].现代隧道技术,2015,52(6):135-140.
[12] 李大勇,陈福全,张庆贺.地铁联络通道冻结施工的三维数值模拟[J].岩土力学,2004,25(S1):472-474.
[13] 徐黎明,陈晓坚,彭正勇,等.海底隧道联络通道冻结法施工健康监测技术研究[J].隧道建设(中英文),2018,38(2):295-299.
[14] 谷佳瑞,王仲刚.海水集料混凝土的研究进展[J].水利与建筑工程学报,2017,15(4):58-61,106.
[15] 刘旭辉,陈小明,黄海杨,等.海洋环境中活塞杆两种喷涂防腐技术测试报告分析和工程应用初探[J].水利与建筑工程学报,2019,17(1):108-112,118.
[16] 胡建平,董教社,冯蓓蕾.聚合物海水泥浆的研制[J].探矿工程(岩土钻掘工程),2012,39(12):29-31.
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