基于修正容重增加法的加筋土挡墙稳定性分析
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摘要
在分析容重增加法基本原理和缺陷的基础上,提出容重增加法用于加筋土挡墙稳定性分析时的修正方法,给出容重增加法在FLAC3D中的实现步骤,并进行实例分析。研究结果表明:岩土体容重的增加会导致岩土体力抗剪强度的增大和筋材的抗拔力增加,其应用于加筋土挡墙稳定性分析时应进行必要的修正,证明提出的修正方法是可行且高效的。
The basic principle and defects of gravity increase method were analyzed,and the correction method for the gravity increase method that used for reinforced earth retaining wall stability analysis was put forward.Its implementation steps in FLAC3D was given,and an example was analyzed.The results show that the increase of rock and soil bulk density leads to the increase of the geotechnical strength shear strength and the strength reinforcements of anti-pullout.But it is should be modified when the gravity increase method is applied to the analysis of reinforced soil retaining wall stability.Besides,the correction method is feasible and efficient.
The basic principle and defects of gravity increase method were analyzed,and the correction method for the gravity increase method that used for reinforced earth retaining wall stability analysis was put forward.Its implementation steps in FLAC3D was given,and an example was analyzed.The results show that the increase of rock and soil bulk density leads to the increase of the geotechnical strength shear strength and the strength reinforcements of anti-pullout.But it is should be modified when the gravity increase method is applied to the analysis of reinforced soil retaining wall stability.Besides,the correction method is feasible and efficient.
引文
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[14]蒋世庭,喻明灯,雷云佩.膨胀土边坡双排抗滑桩土压力监测与分析[J].铁道科学与工程学报,2011,8(6):70-74.JIANG Shi-tin,YU Ming-deng,LEI Yun-pei.Monito-ring and analysis of earth pressure on double-rom anti-slide piles in expansive soil landslide[J].Journal ofRailway Science and Engineering,2011,8(6):70-74.
[2]姚胜利,李强.基于临界滑动场的加筋土边坡稳定性分析[J].路基工程,2010(4):140-142.YAO Sheng-li,LI Qiang.Analysis on reinforced soilslope stability based on critical sliding field[J].SubgradeEngineering,2010(4):140-142.
[3]李强,朱大勇.加筋土边坡临界滑动场[J].防灾减灾工程学报,2010,30(4):431-434.LI Qiang,ZHU Da-yong.Critical slip field of reinforcedsoil slope[J].Journal of Disaster Prevention and Mitiga-tion Engineering,2010,30(4):431-434.
[4]范鹏贤,陈灿寿,黄育.加筋土边坡稳定性分析的水平条分法[J].岩土工程技术,2010,24(2):55-57,97.FAN Peng-xian,CHEN Can-shou,HUANG Yu.Limit e-quilibrium method for reinforced slope based on horizontalslice[J].Geotechnical Engineering Technique,2010,24(2):55-57,97.
[5]莫介臻,周世良,何光春,等.加筋土挡墙潜在破裂面模型试验研究[J].铁道学报,2007,29(6):69-73.MO Jie-zhen,ZHOU Shi-liang,HE Guang-chun,et al.Study on potential failure surface model of reinforced soilretaining walls[J].Journal of the China Railway Society,2007,29(6):69-73.
[6]Zienkiewicz O C,Humpheson C,Lewis R W.Associatedand non-associated visco-plasticity and plasticity insoil mechanics[J].Geotechnique,1975,25(4):671-689.
[7]陈华,赵有明,张发春.土工格栅加筋土挡墙施工工况有限元分析[J].重庆交通大学学报:自然科学版,2009,28(6):1088-1091.CHEN Hua,ZHAO You-ming,ZHANG Fa-chun.Finiteelement analysis on geo-grid reinforced earth retainingwall at construction stages[J].Journal of Chongqing Jiao-tong University:Natural Science,2009,28(6):1088-1091.
[8]刘祚秋,周翠英,董立国.边坡稳定及加固分析的有限元强度折减法[J].岩土力学,2005,26(4):558-561.LIU Zuo-qiu,ZHOU Cui-ying,DONG Li-guo,et al.Slope stability and strengthening analysis by strength re-duction FEM[J].Rock and Soil Mechanics,2005,26(4):558-561.
[9]连镇营,韩国城,孔宪京.强度折减法研究开挖边坡的稳定性[J].岩土工程学报,2001,23(4):407-411.LIAN Zhen-ying,HAN Guo-cheng,KONG Xian-jing.Stability analysis of excavation by strength reduction FEM[J].Chinese Jounal of Geotechnical Engineering,2001,23(4):407-411.
[10]王清,陆新.用有限元强度折减法进行加筋土挡土墙稳定性分析[J].后勤工程学院学报,2006(1):63-66.WANG Qing,LU Xin.Stability analysis on reinforcedretaining wall by strength reduction of FEM[J].Journalof Logistical Engineering University,2006(1):63-66.
[11]钟国强,周亦唐,葛晓旭,等.用有限元强度折减法求加筋土挡墙的稳定安全系数[J].昆明理工大学学报:理工版,2003,(1):123-126.ZHONG Guo-qiang,ZHOU Yi-tang,GE Xiao-xu,et al.Analysis on safety coefficient of reinforced earth wallswith FEM c-reduction[J].Journal of Kunming Univer-sity of Science and Technology,2003(1):123-126.
[12]姚激,李泽,王会云.容重增加法分析边坡稳定性的研究[J].路基工程,2010(4):47-49.YAO Ji,LI Ze,WANG Hui-yun.Analysis of slop sta-bility with unit weight increase method highway withgrouting method[J].Subgrade Engineering,2010(4):47-49.
[13]柏亚双,张文圣,朱德滨,等.基于有限元重度增加法计算边坡稳定系数[J].世界地震工程,2011,27(3):146-150.BAI Ya-shuang,ZHANG Wen-sheng,ZHU De-bin,etal.Slope stability analyses based on gravity increasewith finite element method[J].World Earthquake Engi-neering,2011,27(3):146-150.
[14]蒋世庭,喻明灯,雷云佩.膨胀土边坡双排抗滑桩土压力监测与分析[J].铁道科学与工程学报,2011,8(6):70-74.JIANG Shi-tin,YU Ming-deng,LEI Yun-pei.Monito-ring and analysis of earth pressure on double-rom anti-slide piles in expansive soil landslide[J].Journal ofRailway Science and Engineering,2011,8(6):70-74.
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