考虑流变特性的软土长时位移分析方法及其应用

摘要/Abstract

摘要：

建立了一种以有限元法瞬态力学状态模型与土体位移时效系数相结合的经验型软土长时位移计算方法，通过有限元数值方法模拟工程施工过程而得到软土的瞬时位移，并采用位移时效系数对软土的扰动位移进行时效性分析，将其瞬时位移转化为考虑流变特性的长时位移.其中，位移时效系数的确定结合了软土的流变试验和现场工程的最不稳定时间，反映了软土的流变状态.同时，以宁波市东环南路地铁站基坑工程为例进行了位移时效性分析，以验证所建方法的有效性.结果表明，计算所得软土的长时位移值与现场的监测结果较吻合.

关键词: 软土, 流变特性, 有限元法, 位移时效特性

Abstract:

Based on transient finite element method (FEM) and displacement aging coefficient, a method was proposed to obtain the influence of the rheological properties of soft soil on engineering construction. The transient soil displacement was simulated using the FEM simulation method. According to analysis of soft soil from displacement timeliness, its transient displacement could be changed into long-time displacement with rheology. And the displacement aging coefficient was calculated from triaxial rheological test of soft soil and the most negative time in the site. So this coefficient can reflect the rheological unstable condition of soft soil. A case of excavation simulation of the South East Outer Ring Road Station in Ningbo was conducted using this method. The calculated displacement result of soft soil agrees well with the on-site monitoring result.

Key words: soft soil, rheological property, finite element method (FEM), displacement aging characteristic

中图分类号:

TU 452

赖华辉1a，朱继文2，王颖轶1b,黄醒春1a,1b. 考虑流变特性的软土长时位移分析方法及其应用[J]. 上海交通大学学报（自然版）, 2013, 47(09): 1419-1423.

LAI Huahui1a,ZHU Jiwen2,WANG Yingyi1b,HUANG Xingchun1a,1b. Analysis of Displacement of Soft Soil and Its Application Considering the Rheological Property[J]. Journal of Shanghai Jiaotong University, 2013, 47(09): 1419-1423.

参考文献

［1］Zhu Guofu, Yin Jianhua. Elastic viscoplastic consolidation modeling of clay foundation at Berthierville test embankment ［J］. International Journal for Numerical and Analytical Methods in Geomechanics, 2000, 24 (5): 491508.

［2］张惠明, 徐玉胜, 曾巧玲. 深圳软土变形特性与工后沉降［J］. 岩土工程学报, 2002, 24 (4): 509514.

ZHANG Huiming, XU Yusheng, ZENG Qiaoling. Deformation behavior of Shenzhen soft clay and postconstruction settlement ［J］. Chinese Journal of Geotechnical Engineering, 2002, 24 (4): 509514.

［3］王琛, 胡德金, 刘浩吾, 等. 三峡泄滩滑坡滑动带土的改进Mesri蠕变模型［J］. 岩土力学, 2003, 24 (6): 10071010.

WANG Chen, HU Dejin, LIU Haowu, et al. Creep tests of sliding zone soils of Xietan landslide in Three Gorges Area ［J］. Rock and Soil Mechanics, 2003, 24 (6): 10071010.

［4］董明钢, 范厚彬, 胡志平. 一种软黏土三轴流变试验的数值模拟技术［J］. 土工基础, 2003, 17 (3): 4345.

XDONG Minggang, FAN Houbin, HU Zhiping. Numerical simulation technology of soft clay rheological test ［J］. Soil Eng and Foundation, 2003, 17 (3): 4345.

［5］汤斌, 陈晓平, 张伟. 考虑流变性状的软土地基固结有限元分析［J］. 岩土力学, 2004, 25 (4): 583586.

TANG Bin, CHEN Xiaoping, ZHANG Wei. Finite element analysis for consolidation of soft clay ground considering its rheological behaviors ［J］. Rock and Soil Mechanics, 2004, 25 (4): 583586.

［6］庄丽, 周顺华, 宫全美, 等. 大面积软土基坑放坡开挖引起蠕变的数值分析［J］. 岩石力学与工程学报, 2006, 25 (S2): 42094214.

ZHUANG Li, ZHOU Shunhua, GONG Quanmei, et al. Numerical analysis of creep induced by excavating slope in soil pit with large area ［J］. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (S2): 42094214.

［7］Mesri G, FebresCordero E, Shields D R, et al. Shear stressstraintime behavior of clay ［J］. Geotechnique, 1981, 31 (4): 537552.

［8］王常明, 王清, 张淑华. 滨海软土蠕变特性及蠕变模型［J］. 岩石力学与工程学报, 2004, 23 (2): 227230.

WANG Changming, WANG Qing, ZHANG Shuhua. Creep characteristics and creep model of marine soft soils ［J］. Chinese Journal of Rock Mechanics and Engineering, 2004, 23 (2): 227230.

[1]	. 步幅对膝关节接触的影响[J]. J Shanghai Jiaotong Univ Sci, 2025, 30(4): 759-767.
[2]	刘阳, 孙诗语, 何榛林, 马荣太. 环氧树脂密封胶流变特性及水下密封模拟实验研究[J]. 海洋工程装备与技术, 2024, 11(3): 78-83.
[3]	翟旭茂, 田新伟, 张传斌, 李玉娟, 刘硕, 崔毅. 柴油机活塞缸套摩擦副润滑和多柔体动力学耦合特性[J]. 上海交通大学学报, 2024, 58(3): 324-332.
[4]	AZKA Umar, 姜淳, KHUSHIK Muhammad Hanif Ahmed Khan . 二维Si-A (Ge, Pb, Sn)合金-气孔热晶体的能带结构特征[J]. J Shanghai Jiaotong Univ Sci, 2023, 28(2): 180-185.
[5]	陈洋, 蒋刚, 梁山, 王肇喜. 典型舱段结构高频振动仿真分析方法[J]. 空天防御, 2023, 6(2): 88-94.
[6]	王谦, 丁晓红, 张横. 厚薄通用四边形平板壳元在薄壁结构加筋布局优化中的应用[J]. 空天防御, 2023, 6(2): 55-61.
[7]	胡安峰, 龚昭祺, 肖志荣, 陈缘. 隧道周围饱和软土二维非线性固结分析[J]. 上海交通大学学报, 2023, 57(12): 1631-1638.
[8]	张培珍, 林芳. 开式呼吸蛙人专用氧气瓶声散射特性[J]. 上海交通大学学报, 2022, 56(6): 764-771.
[9]	张宇, 刘海亭, 翁琳, 沈耀. 环形缺口小冲杆试样结合内聚力模型提取断裂韧性参数[J]. 上海交通大学学报, 2021, 55(7): 850-857.
[10]	郑昌隆, 丁晓红, 沈洪, 赵利娟. 基于自适应成长法的舵面结构动力学拓扑优化设计方法研究[J]. 空天防御, 2021, 4(2): 7-12.
[11]	王峰, 陈佳莉, 陈灯红, 范勇, 李志远, 何卫平. 基于滑动Kriging插值的EFG-SBM求解含侧边界的稳态热传导问题[J]. 上海交通大学学报, 2021, 55(11): 1483-1492.
[12]	蒋倩倩，王家序，李俊阳，肖科，唐挺，王成. 双圆弧谐波传动齿廓参数对柔轮应力影响[J]. 上海交通大学学报, 2020, 54(2): 167-175.
[13]	叶礼裕, 王超, 郭春雨, 常欣. 集中冰载工况下的桨叶边缘强度校核方法[J]. 上海交通大学学报, 2020, 54(1): 10-19.
[14]	唐建辉，李平，王新浪，金奕潼. 管夯深层加固方法的软基现场工艺试验[J]. 上海交通大学学报, 2019, 53(7): 812-818.
[15]	刘永财，鲍益东，秦雪娇，刘玉琳，陈文亮. 板料成形快速模拟的中间构形构造方法[J]. 上海交通大学学报, 2019, 53(6): 713-718.