220 kV华月线过海电缆隧道盾构修复海上冰冻技术
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摘要
[目的]220 kV华月线过海电缆隧道工程在盾构推进至+118环时出现险情,隧道被淹,盾构修复必须对正面土体进行加固处理以解决盾构机头处涌砂、涌水的问题。[方法]在综合考虑了各种条件后,利用淡水冻结计算原理,结合现场海水和土样试验数据,尝试海水冻结。[结果]实现了国内首例海上冰冻进行土体加固措施并获得成功。[结论]冻结施工的有效实施,可成功地解决隧道盾构切口处漏水的难题,案例经验和数据极具参考价值。
[Introduction]Under construction in 220 kV Huayue line submarine tunnel project, some emergency danger occurred because of seawater inflow. [Method]The advantage of freshwater freezing technology had been tried to solve this problem. After several tests of the seawater and soil sample, some calculations were done according to the test data and freshwater freezing theory. [Result]The problem has been resolved successfully by seawater freezing. The seawater freezing technology has been used for the first time in the nation. Due to this method, the construction can be continuously done according to existing plan, otherwise this tunnel may have to scrap. [Conclusion] The seawater freezing technology is very efficient and economic to deal with seawater inflow of tuneling under seawater.
[Introduction]Under construction in 220 kV Huayue line submarine tunnel project, some emergency danger occurred because of seawater inflow. [Method]The advantage of freshwater freezing technology had been tried to solve this problem. After several tests of the seawater and soil sample, some calculations were done according to the test data and freshwater freezing theory. [Result]The problem has been resolved successfully by seawater freezing. The seawater freezing technology has been used for the first time in the nation. Due to this method, the construction can be continuously done according to existing plan, otherwise this tunnel may have to scrap. [Conclusion] The seawater freezing technology is very efficient and economic to deal with seawater inflow of tuneling under seawater.
引文
[1] 汪仁和,曹荣斌. 双排管冻结下冻结壁温度场形成特征的数值分析 [J]. 冰川冻土,2002(2):181-185. WANG R H, CAO R B. Numerical analysis of the temperature field features in the frozenwall with double rows of freezing pipes [J]. Journal of Glaciology and Geocryology, 2002(2): 181-185.
[2] 汤志斌,陈文豹,李功洲. 冻结壁温度场的实测研究及在工程中的应用[C]//中国煤炭学会. 中国煤炭学会地层冻结工程技术和应用学术研讨会,福州,1995-06-01. 北京:煤炭工业出版社,1995:216-222.
[3] 胡向东. 上海长江隧道冻土试验报告 [R]. 上海:同济大学,2007.
[4] 杨平. 原状土与冻融土物理力学性能差异性研究 [J]. 南京林业大学学报(自然科学版),2001(2): 68-70. YANG P. Study on the difference of physical and mechanical properties between original and thawing soil [J]. Journal of Nanjing Forestry University(Natural Sciences Edition),2001(2): 68-70.
[5] 于俊岭,孙强. 南方电网首条海底电缆专用隧道之难点与创新 [J]. 广东电力,2014,27(11):114-116. YU J L, SUN Q. Difficulty and innovation of the first exclusive subsea cable tunnel in Southern Power Grid [J]. Guangdong Electric Power,2014,27(11):114-116.
(1)1 cal≈4.2 J。
[2] 汤志斌,陈文豹,李功洲. 冻结壁温度场的实测研究及在工程中的应用[C]//中国煤炭学会. 中国煤炭学会地层冻结工程技术和应用学术研讨会,福州,1995-06-01. 北京:煤炭工业出版社,1995:216-222.
[3] 胡向东. 上海长江隧道冻土试验报告 [R]. 上海:同济大学,2007.
[4] 杨平. 原状土与冻融土物理力学性能差异性研究 [J]. 南京林业大学学报(自然科学版),2001(2): 68-70. YANG P. Study on the difference of physical and mechanical properties between original and thawing soil [J]. Journal of Nanjing Forestry University(Natural Sciences Edition),2001(2): 68-70.
[5] 于俊岭,孙强. 南方电网首条海底电缆专用隧道之难点与创新 [J]. 广东电力,2014,27(11):114-116. YU J L, SUN Q. Difficulty and innovation of the first exclusive subsea cable tunnel in Southern Power Grid [J]. Guangdong Electric Power,2014,27(11):114-116.
(1)1 cal≈4.2 J。