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温度变化对深基坑内支撑轴力和变形的影响研究

金亚兵, 沈翔, 劳丽燕

金亚兵, 沈翔, 劳丽燕. 温度变化对深基坑内支撑轴力和变形的影响研究[J]. 岩土工程学报, 2021, 43(8): 1417-1425. DOI: 10.11779/CJGE202108006
引用本文: 金亚兵, 沈翔, 劳丽燕. 温度变化对深基坑内支撑轴力和变形的影响研究[J]. 岩土工程学报, 2021, 43(8): 1417-1425. DOI: 10.11779/CJGE202108006
JIN Ya-bing, SHEN Xiang, LAO Li-yan. Influences of temperature change on axial force and deformation of inner support in deep foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(8): 1417-1425. DOI: 10.11779/CJGE202108006
Citation: JIN Ya-bing, SHEN Xiang, LAO Li-yan. Influences of temperature change on axial force and deformation of inner support in deep foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(8): 1417-1425. DOI: 10.11779/CJGE202108006

温度变化对深基坑内支撑轴力和变形的影响研究  English Version

基金项目: 

广东省深圳市地质局地质工程院士工作站专项经费资助项目 2013B090400025

详细信息
    作者简介:

    金亚兵(1965— ),男,湖北黄梅人,博士,教授级高级工程师,主要从事岩土工程设计和研究工作。E-mail:jinyabing25@sina.com

    通讯作者:

    沈翔, E-mail:228168159@qq.com

  • 中图分类号: TU43

Influences of temperature change on axial force and deformation of inner support in deep foundation pits

  • 摘要: 温度变化对深基坑内支撑轴力和变形的影响明显,当支撑长度和断面尺寸较大时,温差引起的内支撑轴力和变形增量不容忽视。基于内支撑–支护桩–土相互作用且变形协调的前提,提出了采用弹性抗力法对单道支撑和多道支撑的温度应力简化计算方法。结合多道内支撑的深基坑工程案例,采用自主研发的地质灾害与工程结构安全自动化监测预警平台(简称监测平台),实现了深基坑内支撑系统温度变化影响的实时、连续、在线的自动化监测。监测结果验证了本文提出的多道水平支撑温度应力简化计算方法的可行性和可靠性;证明了监测平台是深基坑支撑轴力和变形实时、连续、在线最有效的监测方法。
    Abstract: The effects of temperature change on axial force and deformation of inner support in deep foundation pits are obvious, and the axial force and deformation increment of inner support caused by the temperature difference cannot be ignored when the support length and section size are large. Based on the premise of inner support-retaining pile-soil interaction and deformation coordination, a simplified method for temperature stress with one-layer support and multi-layer supports is proposed by using the elastic resistance method. Based on the case of deep foundation pit with multi-level supports, the integration platform is used to realize the real-time, continuous and online automatic monitoring of the effects of temperature change in the support system in deep foundation pits. The feasibility and reliability of the proposed simplified method for temperature stress of multi-level horizontal supports is verified by the monitoring results, and it is proved that the integration platform is the most effective monitoring method for the axial force and deformation of inner support in deep foundation pits.
  • 图  1   支撑结构体系弹性分析计算模型

    Figure  1.   Model for elastic analysis and calculation of supporting structure system

    图  2   支撑弹性变形计算模型

    Figure  2.   Model for elastic deformation of support

    图  3   支护桩水平刚度系数计算模型

    Figure  3.   Model for calculating horizontal stiffness coefficient of supporting pile

    图  4   腰梁水平刚度系数计算模型

    Figure  4.   Model for calculating horizontal stiffness coefficient of waist beam

    图  5   单道支撑土体变形计算模型

    Figure  5.   Model for soil deformation under one-layer support

    图  6   多道支撑土体变形计算模型

    Figure  6.   Model for soil deformatiom under multi-layer supports

    图  7   基坑支护结构平面和剖面图

    Figure  7.   Structural plan and profile of support of foundation pit

    图  8   支撑轴力随温度变化和坑内土方开挖实测曲线图

    Figure  8.   Variation of measured axial force with internal temperature and earth excavation of foundation pit of support

    图  9   支撑轴力随温度变化实测曲线图

    Figure  9.   Variation of measured axial force with internal temperature of support

    图  10   支撑轴力增量与温度变化关系图

    Figure  10.   Relationship between axial force increment of support and temperature change

    图  11   支撑内部温度与大气温度对比图

    Figure  11.   Comparison between internal temperature of support and air temperature

    表  1   实测数据与理论计算结果对比表

    Table  1   Comparison between measured data and calculated results

    时间实测轴力最大值Nmax/kN实测轴力最小值Nmin/kN支撑内温差ΔT/℃单位温度支撑轴力增量Nt/(kN·℃-1)
    6月17日1600.291133.582.12220.15
    6月18日1731.891394.081.80187.67
    6月19日1866.711463.551.86216.75
    6月20日2042.261635.762.02201.24
    6月21日2125.761767.572.03176.45
    6月22日2189.911867.321.84162.92
    6月23日2293.051952.821.60212.64
    理论计算 1.00232.14
    下载: 导出CSV

    表  2   实测数据与理论计算结果对比表

    Table  2   Comparison between measured data and calculated results

    时间实测轴力最大值Nmax/kN实测轴力最小值Nmin/kN支撑内温差ΔT/℃单位温度支撑轴力增量Nt/(kN·℃-1)
    7月14日3699.573383.701.51209.19
    7月15日3804.063435.851.65223.16
    7月16日3766.853449.241.66191.33
    7月17日3836.413490.911.65209.39
    7月18日3906.813546.861.67215.54
    7月19日3910.633563.411.51229.95
    7月20日3862.643585.431.06261.52
    理论计算 1.00232.14
    下载: 导出CSV

    表  3   DC2-4支撑内部温度与大气温度实测值

    Table  3   Measured values of internal temperature of support DC2-4 and air temperature

    时间支撑内部最低温度/℃测量时间支撑内部最高温度/℃测量时间
    6月17日29.01(26.90)09:12(05:30)31.13(32.20)15:13(14:16)
    6月18日30.21(27.40)09:11(03:45)32.01(31.90)14:26(13:24)
    6月19日30.61(27.70)07:56(05:30)32.47(33.10)17:24(16:43)
    6月20日31.12(27.80)08:29(06:09)33.14(33.20)15:27(15:06)
    6月21日31.51(28.20)08:18(03:35)33.54(32.80)15:24(14:14)
    6月22日31.87(28.60)08:46(06:04)33.85(33.10)14:50(14:05)
    6月23日32.48(28.80)09:10(05:22)34.08(33.20)14:45(13:19)
    7月14日31.44(28.80)10:14(06:33)32.95(34.90)17:07(13:32)
    7月15日31.49(28.90)08:22(05:01)33.14(33.90)16:18(12:58)
    7月16日31.17(28.20)09:41(05:17)32.83(33.50)16:49(15:19)
    7月17日31.15(28.10)09:30(03:06)32.80(33.70)17:14(15:11)
    7月18日31.35(28.90)09:13(05:46)33.02(33.60)15:27(13:32)
    7月19日31.40(28.70)10:54(03:22)32.91(33.20)16:33(14:58)
    7月20日31.30(28.30)10:11(04:01)32.36(33.10)16:46(13:55)
    注:表中括号内数据为大气测站G1166实测大气温度值和测量时间。
    下载: 导出CSV
  • [1] 建筑基坑支护技术规程:JGJ120—2012[S]. 2012.

    Technical Specification for Retaining and Protection of Building Foundation Excavations: JGJ 120-2012[S]. 2012. (in Chinese)

    [2] 混凝土结构设计规范:GB50010—2010[S]. 2010.

    Code for Design of Concrete Structures: GB50010—2010[S]. 2010. (in Chinese)

    [3] 钢结构设计规范:GB50017—2017[S]. 2017.

    Code for Design of Steel Structures: GB50017—2012[S]. 2017. (in Chinese)

    [4] 张中普, 姚笑青. 某深基坑事故分析及技术处理[J]. 施工技术, 2005, 34(12): 72-73. doi: 10.3969/j.issn.1002-8498.2005.12.027

    ZHANG Zhong-pu, YAO Xiao-qing. Accident analysis and technology dispose of certain deep foundation pit[J]. Construction Technology, 2005, 34(12): 72-73. (in Chinese) doi: 10.3969/j.issn.1002-8498.2005.12.027

    [5] 郑刚, 顾晓鲁. 考虑支撑-围护桩-土相互作用的基坑支护水平支撑温度应力的简化分析法[J]. 土木工程学报, 2002, 35(3): 87-89, 108. doi: 10.3321/j.issn:1000-131X.2002.03.017

    ZHENG Gang, GU Xiao-lu. Simple method for calculating temperature stress in horizontal strut of foundation pit considering strut-pile-soil interaction[J]. China Civil Engineering Journal, 2002, 35(3): 87-89, 108. (in Chinese) doi: 10.3321/j.issn:1000-131X.2002.03.017

    [6] 林跃忠, 王铁成, 王来. 钢支撑温度应力对深基坑支护结构的影响研究[J]. 工业建筑, 2004(增刊): 1069-1074. https://cpfd.cnki.com.cn/Article/CPFDTOTAL-QXJX200407001181.htm

    LIN Yue-zhong, WANG Tie-cheng, WANG Lai. Study on the influence of temperature stress of steel support on the supporting structure of deep foundation pit[J]. Industrial Building, 2004(S0): 1069-1074. (in Chinese) https://cpfd.cnki.com.cn/Article/CPFDTOTAL-QXJX200407001181.htm

    [7] 陆培毅, 韩丽君, 于勇. 基坑支护支撑温度应力的有限元分析[J]. 岩土力学, 2008, 29(5): 1290-1294. doi: 10.3969/j.issn.1000-7598.2008.05.027

    LU Pei-yi, HAN Li-jun, YU Yong. Finite element analysis of temperature stress in strut of foundation pit[J]. Rock and Soil Mechanics, 2008, 29(5): 1290-1294. (in Chinese) doi: 10.3969/j.issn.1000-7598.2008.05.027

    [8] 吴明, 孙鸣宇, 夏唐代, 等. 多层支撑深基坑中考虑支撑-围护桩-土相互作用的水平支撑温度应力简化计算方法[J]. 土木工程学报, 2009, 42(1): 91-94. doi: 10.3321/j.issn:1000-131X.2009.01.014

    WU Ming, SUN Ming-yu, XIA Tang-dai, et al. Simplified method of calculating temperature stress in multi-layer struts for deep excavations considering strut-pile-soil interactions[J]. China Civil Engineering Journal, 2009, 42(1): 91-94. (in Chinese) doi: 10.3321/j.issn:1000-131X.2009.01.014

    [9] 吴明, 彭建兵, 邓亚虹, 等. 改进的深基坑多层支撑温度应力计算方法[J]. 现代隧道技术, 2013, 50(1): 123-128. https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201301022.htm

    WU Ming, PENG Jian-bing, DENG Ya-hong, et al. Modified method for calculating temperature stress in multi-layer struts of a deep foundation pit[J]. Modern Tunnelling Technology, 2013, 50(1): 123-128.(in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201301022.htm

    [10] 艾智勇, 苏辉. 深基坑多层水平支撑温度应力的简化计算方法[J]. 同济大学学报(自然科学版), 2011, 39(2): 199-203. doi: 10.3969/j.issn.0253-374x.2011.02.008

    AI Zhi-yong, SU Hui. A simplified method of calculating thermal Stress for multi-layered horizontal struts in deep excavations[J]. Journal of Tongji University(Natural Science), 2011, 39(2): 199-203. (in Chinese) doi: 10.3969/j.issn.0253-374x.2011.02.008

    [11] 惠渊峰. 某地铁车站深基坑钢支撑温度应力计算与分析[J]. 建筑科学, 2012, 28(9): 101-103, 111. https://www.cnki.com.cn/Article/CJFDTOTAL-JZKX201209023.htm

    HUI Yuan-feng. The deep foundation pit steel brace temperature stresses analysis and calculation of subway station[J]. Building Science, 2012, 28(9): 101-103, 111. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JZKX201209023.htm

    [12]

    CHAPMAN K R, CORDING E J, SCHNABEL H. Performance of a braced excavation in granular and cohesive soils[C]//ASCE Specially Conference on Performance of Earth and Earth-Supported Structures. Purdue University, 1972: 271-293.

    [13] 陈锋, 艾英钵. 基坑钢支撑温度应力的弹性热力学解答[J]. 科学技术与工程, 2013, 13(1): 108-111. https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS201301023.htm

    CHEN Feng, AI Ying-bo. Calculation of temperature stress of steel support in foundation pit using thermodynamics of elasticity[J]. Science Technology and Engineering, 2013, 13(1): 108-111. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-KXJS201301023.htm

    [14] 范君宇. 深大基坑中水平支撑的温度内力与变形计算[J]. 山西建筑, 2014, 40(18): 59-62. https://www.cnki.com.cn/Article/CJFDTOTAL-JZSX201418033.htm

    FAN Jun-yu. In deep big hole excavated for building foundation level support temperature endogenic force and distortion computational method[J]. Shanxi Architecture, 2014, 40(18): 59-62. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JZSX201418033.htm

    [15] 向艳. 温度应力对深基坑支护结构内力与变形的影响研究[J]. 岩土工程学报, 2014, 37(增刊2): 64-69. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2014S2013.htm

    XIANG Yan. Influence of temperature stress on internal force and deformation of retaining structures for deep excavations[J]. Chinese Journal of Geotechnical Engineering, 2014, 37(S2): 64-69. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2014S2013.htm

    [16] 刘畅, 张亚龙, 郑刚, 等. 改进的基坑支护水平支撑温度应力及水平位移的计算方法[J]. 岩土工程学报, 2015, 37(增刊1): 61-64. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2015S1014.htm

    LIU Chang, ZHANG Ya-long, ZHENG Gang, et al. Modified method for calculating temperature stress and displacement in horizontal strut of foundation pits[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(S1): 61-64. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC2015S1014.htm

    [17] 冉岸绿, 孙旻, 王浩, 等. 温度变化对新型钢支撑轴力的影响分析[C]//第十届全国基坑工程研讨会学术论文集. 兰州: 兰州理工大学, 2018: 675-678.

    RAN An-lu, SUN Min, WANG Hao, et al. Analysis of the influence of temperature change on the axial force of new steel support[C]//Academic Papers of the Tenth Nationwide Foundation Pit Engineering Seminar. Lanzhou: Lanzhou University of Technology, 2018: 675-678. (in Chinese)

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出版历程
  • 收稿日期:  2020-12-24
  • 网络出版日期:  2022-12-02
  • 刊出日期:  2021-07-31

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