盾构出洞水平冻结加固施工参数分析研究  

STUDY ON CONSTRUCTION PARAMETERS OF HORIZONTAL FREEZING REINFORCEMENT FOR SHIELD LAUNCHING

作　　者：翟永亮 李铭远 时媛媛 贾龙杰 ZHAI Yong-liang;LI Ming-yuan;SHI Yuan-yuan;JIA Long-jie(Zhengzhou No.1 Construction Group Co.,Ltd.,450004,Zhengzhou,China;Department of Civil Engineering,Zhengzhou University,450001,Zhengzhou,China)

机构地区：[1]郑州一建集团有限公司,郑州450004 [2]郑州大学,土木工程学院,郑州450001

出　　处：《建筑技术》2020年第6期758-761,共4页Architecture Technology

基　　金：国家自然科学基金项目(41602297);河南省科技攻关项目(182102310009)。

摘　　要：冻结法施工在一些复杂地形、加固受限的施工中应用广泛,与其他加固方式相比有独特的优点和可靠性。以郑州市地铁17号线双鹤湖站区间盾构水平冻结法出洞施工为工程背景,采用三维数值分析法对冻结壁厚度、冻结长度、有无杯底等工况分别进行模拟。结果表明:有杯底的情况下冻结壁应力值比无杯底要小,增加杯底厚度可减小冻结壁应力值;有杯底时,增加冻结壁厚度对于应力值的降低作用更明显;增加冻结壁长度可减小冻结壁压应力,但对减小冻结壁剪应力作用不大;冻结壁杯底的存在对周围结构的竖向位移变化存在改善作用。The freezing method construction is widely used in some constructions with complex terrain and limited reinforcement,and has unique advantages and reliability compared with other reinforcement methods.Based on the engineering background of the horizontal freezing method of shield tunneling at Shuanghehu Station on Zhengzhou Metro Line 17,the three-dimensional numerical analysis method was used to simulate the freezing wall thickness,freezing length,and the presence or absence of cup bottom.The results show that the stress value of the frozen wall is smaller than that without the cup bottom.Increasing the thickness of the cup bottom can reduce the stress value of the frozen wall;when there is a cup bottom,the effect of increasing the thickness of the frozen wall on the stress value is more obvious Increasing the length of the frozen wall can reduce the compressive stress of the frozen wall,but it has little effect on reducing the shear stress of the frozen wall;the presence of the bottom of the frozen wall cup can improve the vertical displacement of the surrounding structure.

关 键 词：盾构 冻结法 冻结壁 冻结参数 

分 类 号：TU71[建筑科学—建筑技术科学]