人工冻结在岩土工程中的应用现状及发展
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摘要
对于高含水量的土层,常用的开挖方法并不适用,人工冻结法(Artificial Ground Freezing,AGF)是一种可以适用特殊地质条件的施工方法,与一般方法相比,展现出适应性强,可控性高,加固的地层强度高、封水性好,环境影响低等优点。因AGF的优点,被广泛应用于矿井井壁及地铁联络通道建设。前者冻结范围广,深度大,冻结时间较长,施工难度大;后者冻结范围小,深度浅,但因多在城市地下施工,地下条件复杂,施工难度较大。冻结帷幕厚度的确定及冻胀融沉给工程带来的影响是二者共同的核心问题,如何在施工中准确控制冻结的范围、减小冻胀融沉对工程的影响是当前主要的研究对象。
For the high water content, excavation method commonly used is not suitable, the artificial freezing method(Artificial Ground Freezing, AGF) is a construction method for the special geological conditions, compared with the general method, showing strong adaptability, high controllability, high strength reinforcement strata and water well low environmental impact. Because of the advantages of AGF, it is widely used in the construction of mine shaft lining and subway connection passage. The former has wide freezing range, large depth and long freezing time, and it is difficult to construct. The latter has a small freezing range and a shallow depth, but it is difficult to construct because of many underground construction and complicated underground conditions. The thickness and the frost thawing effect of freezing curtain brings engineering is the core issue of the two together, how in the construction of accurate control of frozen thawing range and decreasing the impact of the project is the main research object. reduce the influence of frost heave on engineering is the main research object.
For the high water content, excavation method commonly used is not suitable, the artificial freezing method(Artificial Ground Freezing, AGF) is a construction method for the special geological conditions, compared with the general method, showing strong adaptability, high controllability, high strength reinforcement strata and water well low environmental impact. Because of the advantages of AGF, it is widely used in the construction of mine shaft lining and subway connection passage. The former has wide freezing range, large depth and long freezing time, and it is difficult to construct. The latter has a small freezing range and a shallow depth, but it is difficult to construct because of many underground construction and complicated underground conditions. The thickness and the frost thawing effect of freezing curtain brings engineering is the core issue of the two together, how in the construction of accurate control of frozen thawing range and decreasing the impact of the project is the main research object. reduce the influence of frost heave on engineering is the main research object.
引文
[1]李戈.高承压水粉细砂地层中地铁隧道联络通道冷冻法施工技术[D].西安:长安大学,2012.
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[8]李磊.冻结法施工立井井筒井壁结构设计研究[J].山西建筑,2015,41(6):102-103.
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[13]李海生.岭下隧道联络通道冻结法施工力学模拟分析[J].四川建筑,2014,34(2):181-184.
[2]高岗荣.伊犁1号井砾石层冻结窗口注浆处理[J].建井技术,2014,35(6):4-7.
[3]叶玉西.冻结器内纵向测温判定冻结壁出水位置技术[J].煤炭科学技术,2015,43(3):13-16.
[4]夏阳,岳丰田,高书豹,等.西部地区淹水井筒冻结法施工监测分析[J].煤炭科学技术,2012,40(3):37-40,94.
[5]张文.我国冻结法凿井技术的现状与成就[J].建井技术,2012,33(3):4-13.
[6]翟所国,张学如.高压力大流速富水软岩地层冻结技术[J].建井技术,2014,35(6):15-18,14.
[7]郭少华,付厚利,韩继欢.朱集矿主井井筒冻结壁厚度参数优化应用[J].煤炭技术,2015,34(2):56-57.
[8]李磊.冻结法施工立井井筒井壁结构设计研究[J].山西建筑,2015,41(6):102-103.
[9]赵强,武光辉.冻结法施工解冻水害的机理及治理技术[J].中国矿业,2012,21(S1):533-535.
[10]李亚巍,王琛,余群舟.武汉江底高承压水联络通道施工风险控制[J].施工技术,2016,45(7):118-122.
[11]张一宁.地铁旁通道(泵站)和冻结法施工风险分析与建议[J].城市道桥与防洪,2010,(10):128-131,209.
[12]郭剑虹,朱江波,袁忠银,等.上海长江隧道江中段连接通道冻结法施工[J].上海师范大学学报:自然科学版,2010,39(4):390-394.
[13]李海生.岭下隧道联络通道冻结法施工力学模拟分析[J].四川建筑,2014,34(2):181-184.