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李小彤,张万志,徐帮树,等. 矩形顶管施工多测点位移反分析方法[J]. 科学技术与工程, 2021, 21(24): 10498-10505.
Li Xiaotong,Zhang Wanzhi,Xu Bangshu,et al.Study on the back analysis method of displacement of multiple measuring points in rectangular pipe jacking construction[J].Science Technology and Engineering,2021,21(24):10498-10505.
矩形顶管施工多测点位移反分析方法
Study on the back analysis method of displacement of multiple measuring points in rectangular pipe jacking construction
投稿时间:2021-01-07  修订日期:2021-05-30
DOI:
中文关键词:  地表沉降  土体力学参数  黄金分割  多测点位移反分析  数值模拟
英文关键词:surface settlement  mechanical parameters of soil  golden section  back analysis of multi-point displacement  numerical simulation
基金项目:国家自然科学基金青年科学(50909056);山东省自然科学基金面上项目(ZR2014EEM014)
              
作者单位
李小彤 山东大学齐鲁交通学院
张万志 山东交通学院交通土建工程学院
徐帮树 山东大学齐鲁交通学院
袁洋 中铁十四局集团第二工程有限公司
李腾 中铁十四局集团第二工程有限公司
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中文摘要:
      针对矩形顶管施工穿越土层段地表全范围沉降规律难以准确获取的问题。本文依托太原地铁2号线长风街站地下通道工程,基于位移反分析理论,综合应用黄金分割法和数值仿真方法,提出了土体弹性模量E与粘聚力c的反演方法。进而,从数值计算结果中可较为准确的获得地表全范围沉降规律。结果表明:相比单测点反演计算,选用三测点地表沉降实测值获取的土层参数E、c更能准确反映地表沉降。三测点反演迭代计算8次,沉降误差函数为0.0181,满足精度要求。选用不同位置的其他两个测点,对比分析其地表沉降数值计算值与实测值,相对误差很小,分别为0.45%和0.29%,验证了多测点位移反分析方法的准确性。研究结果可为矩形顶管施工地表沉降规律研究提供一定的指导意义。
英文摘要:
      In order to solve the problem that it’s difficult to accurately obtain the full-range surface settlement law of the rectangular pipe jacking construction through the soil layer. Based on the underground passage project of Changfeng Street Station of Taiyuan Metro Line 2, this paper proposed an inversion method of soil elastic modulus (E) and cohesive force (c) by applying the golden section method and numerical simulation method comprehensively based on the theory of displacement back analysis. Furthermore, the full-range surface settlement law can be obtained accurately from the numerical calculation results. The results showed that compared with the inversion calculation of a single measuring point, the soil parameters E and c obtained by using the measured values of the surface settlement of three measuring points can reflect the surface settlement more accurately. After 8 times of inversion iteration, the settlement error function is 0.0181, which met the precision requirement. Two other measuring points at different locations were selected to compare and analyze the calculated and measured values of the surface settlement, and the relative errors were very small, 0.45% and 0.29% respectively, which verified the accuracy of the back analysis method of displacement at multiple measuring points. The research results can provide some guiding significance for the study of surface settlement law of rectangular pipe jacking construction.
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