杜斌, 吴梦喜. 土石坝分层填筑位移场修正的一种新方法[J]. 力学与实践, 2011, 33(4): 23-28. DOI: 10.6052/1000-0879-lxysj2011-029
引用本文: 杜斌, 吴梦喜. 土石坝分层填筑位移场修正的一种新方法[J]. 力学与实践, 2011, 33(4): 23-28. DOI: 10.6052/1000-0879-lxysj2011-029
Du Bin, Wu Mengxi. A NEW APPROACH FOR MODIFICATION OF DISPLACEMENT IN INCREMENTAL CONSTRUCTION ANALYSIS OF EARTH-ROCK DAM[J]. MECHANICS IN ENGINEERING, 2011, 33(4): 23-28. DOI: 10.6052/1000-0879-lxysj2011-029
Citation: Du Bin, Wu Mengxi. A NEW APPROACH FOR MODIFICATION OF DISPLACEMENT IN INCREMENTAL CONSTRUCTION ANALYSIS OF EARTH-ROCK DAM[J]. MECHANICS IN ENGINEERING, 2011, 33(4): 23-28. DOI: 10.6052/1000-0879-lxysj2011-029

土石坝分层填筑位移场修正的一种新方法

A NEW APPROACH FOR MODIFICATION OF DISPLACEMENT IN INCREMENTAL CONSTRUCTION ANALYSIS OF EARTH-ROCK DAM

  • 摘要: 在进行土石坝分层填筑情况下的应力变形有限元计算时, 需要对新填土层做位移修正. 考虑牵连位移和相对位移两个方面对新填土层中质点位移的影响, 推导了一维情况下线弹性材料一次加荷与多级加荷时沉降的理论解, 建立了针对新填土层的一种新的位移修正方法, 应用该方法修正分层填筑位移场可以消除位移等值线不合理的锯齿状特征, 并结合典型算例与已有方法进行了对比分析. 结果表明, 新的位移修正方法具有较好的修正效果.

     

    Abstract: The incremental construction analysis iswidely applied in the Finite Element Analysis of stress and deformation in the construction of earth-rock dams. The simulated displacementfield may not be suitable for the use in the practice due to the newfilling soil. Thus, the computed displacement field in the new filling soilshould be modified. Based on the fact that the total displacement consistsof the convected displacement and the relative displacement, the theoreticalsettlement solutions in the 1-D condition are obtained in two differentconstruction cases. One is in a single lift and the other is in multilifts. These solutions show that the convected displacement has a greateffect on the total displacement. A new approach for modification isproposed, and a comparison with existing approaches is made for atypical example. The results indicate that the new approach is moreaccurate and effective to eliminate unrealistic features in contours ofdisplacement.

     

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