寒区格构梁与锚杆复合结构的冻胀效应计算方法

doi:10.13722/j.cnki.jrme.2019.0637

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摘要为了研究寒区格构梁与锚杆复合结构变形和内力在冻胀作用下的变化规律，基于Winkler弹性地基梁理论，建立考虑冻胀作用的复合结构计算模型。考虑到土体与支护结构协调变形的特点，将土体的冻胀位移视为自由冻胀和复合结构约束冻胀两部分的叠加，推导出冻胀力计算公式，并采用有限差分法推导冻胀作用下格构梁变形和内力的计算公式。通过算例分析得出，考虑冻胀作用后复合结构的变形和内力十分显著，在寒区边坡支护工程设计时，应当考虑冻胀力的作用并预留足够的安全度。模型试验结果显示，格构梁位移、内力以及锚杆拉力的计算值与试验值分布规律及变化趋势基本一致，说明给出的冻胀效应计算方法合理、可行，为寒区格构梁与锚杆复合结构的分析与设计提供了一种新的思路。

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	董建华1
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	柳珂1
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	董旭光1
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	孙国栋1
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关键词 ：土力学, 寒区边坡, 格构梁与锚杆复合结构, 冻胀作用, 弹性地基梁, 有限差分法

Abstract：In order to study the variations of the deformation and internal force under frost heave effect of lattice beam and anchor composite structure in cold regions，a calculation model of the composite structure considering frost heave is established basing on Winkler elastic foundation beam theory. Considering coordinated deformation of the soil and the support structure and regarding the frost heave displacement of soil as the superposition of free frost heave and constrained frost heave，a calculation expression of frost heave force is given，and calculation formulas of deformation and internal force of lattice beam under frost heave effect are derived by using the finite difference method. An example is illustrated，and it is shown that the displacement and internal force of the compound structure is very significant while considering frost heave effect，which indicates that the frost heaving force should be considered and enough safety margin should be set aside for the design of permafrost slope supporting projects. Comparisons between the model test results and the theoretical calculation show that the values of displacement and internal force of the lattice beam and the anchor tension are basically consistent as well as their variation trends，which indicates that the calculation method of frost heave effect is reasonable and feasible and provides a new idea for the analysis and design of the compound structure of lattice beam and anchor in frozen soil areas.

Key words： soil mechanics permafrost slopes compound structure of lattice beam and anchor frost heave beam on elastic foundation finite difference method

引用本文:

董建华1，2，柳珂1，2，董旭光1，2，孙国栋1，2. 寒区格构梁与锚杆复合结构的冻胀效应计算方法[J]. 岩石力学与工程学报, 2020, 39(5): 984-995.
DONG Jianhua1，2，LIU Ke1，2，DONG Xuguang1，2，SUN Guodong1，2. A calculation method of frost heave effect of lattice beam and anchor composite structure in cold regions#br#. , 2020, 39(5): 984-995.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0637 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I5/984

[7]	孙超，周艳生. 土体冻胀对排桩支护结构影响规律[J]. 工程地质学报，2015，23(增1)：57-62.(SUN Chao，ZHOU Yansheng. Impact of soil heave on pile supporting structure[J]. Journal of Engineering Geology，2015，23(Supp.1)：57-62.(in Chinese))
[17]	邹金锋，李亮，阮波. 弹性状态下锚杆位移变形分析[J]. 中国铁道科学，2004，25(5)：94-96.(ZOU Jinfeng，LI Liang，RUAN Bo. Anlysis of displacement and deformation of anchor bolt under elastic state[J]. China Railway Science，2004，25(5)：94-96.(in Chinese))
[13]	翟婉明. 车辆-轨道耦合动力学[M]. 北京：科学出版社，2007：25-29.(ZHAI Wanming. Vehicle-track coupling dynamics[M]. Beijing：Science Press，2007：25-29. (in Chinese))
[1]	陈默. 冻胀作用对北方越冬土钉墙稳定性的影响[J]. 土工基础，2011，25(4)：25-29.(CHEN Mo. Influences of frost heaving on the stability of soil nailing wall over winter in northern China[J]. Soil Engineering and Foundation，2011，25(4)：25-29.(in Chinese))
[3]	张智浩，马凛，韩晓猛，等. 季节性冻土区深基坑桩锚支护结构冻胀变形控制研究[J]. 岩土工程学报，2012，34(增)：65-71.(ZHANG Zhihao，MA Lin，HAN Xiaomeng，et al. Frost heaving deformation control of pile-anchor retaining structure of deep foundation pits in seasonal frozen soil regions[J]. Chinese Journal of Geotechnical Engineering，2012，34(Supp.)：65-71.(in Chinese))
[5]	孔德宝. 多年冻土地区挡土墙监测研究与数值模拟计算[硕士学位论文][D]. 西安：长安大学，2013.(KONG Debao. Monitoring and numerical simulation of retaining wall in permafrost regions[M. S. Thesis][D]. Xi'an：Chang'an University，2013.(in Chinese))
[8]	RUI D. Full-scale model test on prevention of frost heave of L-type retaining wall[J]. Cold Regions Science and Technology，2016，132：89-104.
[10]	朱宝龙，杨明，胡厚田，等. 土质边坡加固中预应力锚索框架内力分布的试验研究[J]. 岩石力学与工程学报，2005，24(4)：697-702.(ZHU Baolong，YANG Ming，HU Houtian，et al. Testing study on internal forces for prestressed anchor cable frame in reinforced soil slope [J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(4)：697-702.(in Chinese))
[15]	中华人民共和国行业标准编写组. JGJ120—99 建筑基坑支护技术规程[S]. 北京：中国建筑工业出版社，1999.(The Professional Standards Compilation Group of the People′s Republic of China. JGJ120—99 Technical specification for retaining and protection of building fFoundation excavations[S]. Beijing：China Architecture and Building Press，1999.(in Chinese))
[18]	李方政，夏明萍. 基于指数积分函数的人工冻土温度场解析研究[J]. 东南大学学报：自然科学版，2004，34(4)：469-473.(LI Fangzheng，XIA Mingping. Study on analytical solution of temperature field of artificial frozen soil by exponent-integral function[J]. Journal of Southeast University：Natural Science，2004，34(4)：469-473.(in Chinese))
[2]	王家伟. 季节冻土地区深基坑桩锚支护体系安全性研究[J]. 交通科学与工程，2012，28(1)：52-56.(WANG Jiawei. Study on the security of a ultra-deep foundation pit with the pile-anchor support structure in the seasonal frozen earth[J]. Journal of Transport Science and Engineering，2012，28(1)：52-56.(in Chinese))
[4]	王宁伟，矫军，胡文浩. 季节性冻胀对深基坑安全性的影响[C]//第21届全国结构工程学术会议论文集第Ⅰ册，北京：工程力学杂志社，2012：424-427.(WANG Ningwei，JIAO Jun，HU Wenhao. The effect of seasonal frost heave on the safety of deep foundation pit[C]// Proceedings of the 21th National Conference on Structural Engineering Volume I. Beijing：Journal of Engineering Mechanics，2012：424-427.(in Chinese))
[6]	ZHU M，MICHALOWSKI R L. A numerical approach to simulate soil freezing and frost heave behind an earth retaining structure[C]// ASCE International Workshop on Computing in Civil Engineering. [S. l].：[s. n.]，2014：307-314.
[11]	唐仁华，陈昌富，梁冠亭. 框架式预应力锚固系统分阶段可靠性分析[J]. 岩土力学，2014，35(1)：217-225.(TANG Renhua，CHEN Changfu，LIANG Guanting. Reliability analysis in stages for frame-type prestressed anchor system[J]. Rock and Soil Mechanics，2014，35(1)：217-225.(in Chinese))
[12]	曹兴松，肖世国，何洪，等. 高边坡多级锚杆框架上坡体压力模型试验[J]. 地下空间与工程学报，2015，11(5)：1 159-1 163. (CAO Xingsong，XIAO Shiguo，HE Hong，et al. Model test on characteristics of slope pressure on multi-frame beams with anchor bolts used to stabilize high slope[J]. Chinese Journal of Underground Space and Engineering，2015，11(5)：1 159-1 163.(in Chinese))
[14]	徐志胜，翟婉明，王开云. 基于Timoshenko梁模型的车辆轨道耦合振动分析[J]. 西南交通大学学报，2003，(1)：22-27.(XU Zhisheng，ZHAI Wanming，WANG Kaiyun. Analisis of vehicle- track coupling vibration based on Timoshenko beam model[J]. Journal of Southwest Jiaotong University，2003，(1)：22-27.(in Chinese))
[9]	唐仁华，陈昌富，梁冠亭. 框架预应力锚杆挡墙的系统可靠性分析[J]. 岩石力学与工程学报，2013，32(12)：2 520-2 526.(TANG Renhua，CHEN Changfu，LIANG Guanting. System reliability analysis of frame prestressed anchor bolt[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(12)：2 520-2 526.(in Chinese))
[16]	徐学祖，邓友生. 冻土中水分迁移的实验研究[M]. 北京：科学出版社，1991：26-29.(XU Xuezu，DENG Yousheng. Experimental study on water migration in freezing and frozen soils[M]. Beijing：Science Press，1991：26-29.(in Chinese)).
[20]	李怀志. 预应力锚索格构梁受力分析[硕士学位论文][D]. 贵阳：贵州大学，2009.(LI Huaizhi. Stress analysis of prestressed anchor cable lattice beam[M. S. Thesis][D]. Guiyang：Guizhou University，2009.(in Chinese))
[19]	肖旻，王正中，刘铨鸿，等. 考虑冻土与结构相互作用的梯形渠道冻胀破坏弹性地基梁模型[J]. 水利学报，2017，48(10)：1 229-1 239.(XIAO Hao，WANG Zhengzhong，LIU Quanhong，et al. Elastic foundation beam model of frost heave damage of trapezoidal canal considering interaction between frozen soil and lining structure[J]. Journal of Hydraulic Engineering，2017，48(10)：1 229- 1 239.(in Chinese))