|本期目录/Table of Contents|

[1]何 平,王卫东,徐中华,等.上海地区不同强度参数对基坑围护结构变形和内力的影响[J].建筑科学与工程学报,2021,38(06):55-63.[doi:10.19815/j.jace.2021.08059]
 HE Ping,WANG Wei-dong,XU Zhong-hua,et al.Influence of Different Strength Parameters on Deformation and Internal Force of Retaining Structures in Shanghai[J].Journal of Architecture and Civil Engineering,2021,38(06):55-63.[doi:10.19815/j.jace.2021.08059]
点击复制

上海地区不同强度参数对基坑围护结构变形和内力的影响(PDF)
分享到:

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
38卷
期数:
2021年06期
页码:
55-63
栏目:
软土基坑设计与变形控制
出版日期:
2021-11-05

文章信息/Info

Title:
Influence of Different Strength Parameters on Deformation and Internal Force of Retaining Structures in Shanghai
文章编号:
1673-2049(2021)06-0055-09
作者:
何 平1王卫东23徐中华23王 强1
(1. 中冶赛迪上海工程技术有限公司,上海 200940; 2. 华建集团上海地下空间与工程设计研究院,上海 200011; 3. 上海基坑工程环境安全控制工程技术研究中心,上海 200011)
Author(s):
HE Ping1 WANG Wei-dong23 XU Zhong-hua23 WANG Qiang1
(1. CISDI Shanghai Engineering Co., Ltd., Shanghai 200940, China; 2. Arcplus Underground Space & Engineering Design Research Institute, Shanghai 200011, China; 3. Shanghai Engineering Research Center of Safety Control for Facilities Adjacent to Deep Excavations, Shanghai 200011, China)
关键词:
总应力强度参数 有效应力强度参数 平面竖向弹性地基梁法 围护结构 变形 内力
Keywords:
total stress strength parameter effective stress strength parameter plane vertical elastic foundation beam method retaining structure deformation internal force
分类号:
TU447
DOI:
10.19815/j.jace.2021.08059
文献标志码:
A
摘要:
为研究上海地区不同强度参数对基坑围护结构变形和内力的影响,在ABAQUS中建立平面竖向弹性地基梁法模型,根据上海地区4种典型基坑概化模型和上海195个工程勘察报告和文献试验数据统计的典型土层强度参数,研究了每类基坑概化模型中不同强度参数对围护结构的最大水土压力、变形(最大位移)、内力(最大剪力、最大弯矩)以及支撑轴力的影响。结果表明:采用三轴固结不排水(CU)有效应力强度参数得到的围护结构变形和内力结果最小; 采用十字板不排水抗剪强度计算的结果相比有效应力强度参数结果无明显规律; 直剪固结快剪和CU总应力强度参数计算得到的结果较为接近,相比于有效应力强度参数结果,最大位移增量约为6%,最大水土压力增量为4%~5%,最大弯矩和剪力增量为7%~8%; 总体来看,目前上海基坑规范采用固结快剪总应力强度参数进行围护结构设计相比采用有效应力强度参数偏安全。
Abstract:
In order to study the influence of different strength parameters on the deformation and internal force of retaining structures in Shanghai, the model of plane vertical elastic foundation beam method was established in ABAQUS. Based on four kinds of typical excavation generalized models and soil strength parameters collected from 195 engineering investigation reports and literature test data in Shanghai, the influence of four sets of different strength parameters on the maximum soil and water pressure, deformation(maximum displacement), internal force(maximum shear force, maximum bending moment)and strut axial force of retaining structure in each kind of generalized model were studied. The results show that the deformation and internal force of the retaining structure obtained by using triaxial consolidation undrained(CU)effective stress strength parameters are the smallest, while the results calculated by vane undrained shear strength have no obvious rule compared with the results of effective stress strength parameters. The calculated results of direct shear consolidation quick shear and CU total stress strength parameters are relatively close. Compared with the results of effective stress strength parameters, the maximum displacement increment is about 6%, the maximum soil and water pressure increment is 4%-5%, and the maximum bending moment and shear increment is 7%-8%. Generally, in the current Shanghai excavation code, it is safer to adopt the total stress strength parameters of direct shear consolidation quick shear test for the design of retaining structure than to adopt the effective stress strength parameters.

参考文献/References:

[1] DG/TJ 08-61—2018,基坑工程技术标准[S].
DG/TJ 08-61—2018,Technical Code for Excavation Engineering[S].
[2]JGJ 120—2012,建筑基坑支护技术规程[S].
JGJ 120—2012,Technical Specification for Retaining and Protection of Building Foundation Excavations[S].
[3]陈淦琛,钮泽明.对土压力的水土合算与分算的看法[J].地基基础工程,1998,8(2):16-21.
CHEN Gan-chen,NIU Ze-ming.Some Views on Calculation Method of Earth Pressure United with or Separated from Water Pressure[J].Foundation Engineering,1998,8(2):16-21.
[4]李广信.基坑支护结构上水土压力的分算与合算[J].岩土工程学报,2000,22(3):348-352.
LI Guang-xin.Estimating the Water and Earth Pressures on the Supporting Structure Around a Foundation Pit Separately and Together[J].Chinese Journal of Geotechnical Engineering,2000,22(3):348-352.
[5]陈愈炯,温彦锋.基坑支护结构上的水土压力[J].岩土工程学报,1999,21(2):139-143.
CHEN Yu-jiong,WEN Yan-feng.Water and Earth Pressures on the Supporting Structure Around a Foundation Pit[J].Chinese Journal of Geotechnical Engineering,1999,21(2):139-143.
[6]卢斌强,翟守俊,刘晓忠.浅谈基坑土压力的水土分算与水土合算[J].山西建筑,2010,36(33):118-120.
LU Bin-qiang,ZHAI Shou-jun,LIU Xiao-zhong.Analysis of Water and Soil Pressure Divided Calculation and Incorporated Calculation in Soil Pressure of Foundation Ditch[J].Shanxi Architecture,2010,36(33):118-120.
[7]苏 栋.饱和黏土水土压力合算的计算公式[J].岩土力学,2017,38(6):1688-1696.
SU Dong.Calculation of the Water and Earth Pressures for Saturated Clay[J].Rock and Soil Mechanics,2017,38(6):1688-1696.
[8]姚 秦.基坑工程的水土压力混合算法[J].岩石力学与工程学报,2001,20(1):134-135.
YAO Qin.Earth Pressure Calculation Considering Soil-water Jointly on Excavation[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(1):134-135.
[9]王洪新.水土压力分算与合算的统一算法[J].岩石力学与工程学报,2011,30(5):1057-1064.
WANG Hong-xin.Unified Method of Separate and Combined Calculation of Water and Earth Pressures[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(5):1057-1064.
[10]魏汝龙.总应力法计算土压力的几个问题[J].岩土工程学报,1995,17(6):120-125.
WEI Ru-long.Several Questions About Estimating the Earth Pressure Together[J].Chinese Journal of Geotechnical Engineering,1995,17(6):120-125.
[11]魏汝龙.再论总应力法及水和土压力——与陈愈炯教授商榷[J].岩土工程学报,1999,21(4):509-510.
WEI Ru-long.Further Discussion on Total Stress Method and Water and Earth Pressure — Discussion with Professor Chen Yujiong[J].Chinese Journal of Geotechnical Engineering,1999,21(4):509-510.
[12]杨晓军,龚晓南.基坑开挖中考虑水压力的土压力计算[J].土木工程学报,1997,30(4):58-62.
YANG Xiao-jun,GONG Xiao-nan.Calculation of Earth Pressure on Excavation Considering Pore Water Pressure[J].China Civil Engineering Journal,1997,30(4):58-62.
[13]章杨松,罗国煜.基坑开挖中考虑不同强度参数取值的土压力计算[J].水文地质工程地质,2000(2):8-12.
ZHANG Yang-song,LUO Guo-yu.Calculation of Earth Pressure Considering Different Strength Parameters in Foundation Pit Excavation[J].Hydrogeology & Engineering Geology,2000(2):8-12.
[14]张其光,李广信,温庆博.应力路径和强度指标对基坑支护结构上水土压力计算的影响[J].岩石力学与工程学报,2001,20(增1):952-957.
ZHANG Qi-guang,LI Guang-xin,WEN Qing-bo.Effect of Stress Path and Strength Parameters on Estimating Earth Pressure and Water Pressure on the Supporting Structure Around a Foundation Pit[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(S1):952-957.
[15]高广运,李 伟,顾国荣,等.软土基坑土压力计算抗剪强度参数的分析[J].岩土力学,2005,26(增1):183-186.
GAO Guang-yun,LI Wei,GU Guo-rong,et al.Analysis of Shear Strength Parameters for Calculating Earth Pressure in Soft Soil Foundation Pit[J].Rock and Soil Mechanics,2005,26(S1):183-186.
[16]OU C Y.Deep Excavation:Theory and Practice[M].London:Taylor & Francis,2006.
[17]马 郧,李 松,徐光黎,等.武汉某超深基坑软土抗剪强度指标选取及应用研究[J].岩土力学,2014,35(增2):306-312,318.
MA Yun,LI Song,XU Guang-li,et al.Selection and Application Research on Shear Strength Index of Soft Soil for Ultra Deep Foundation Pit in Wuhan[J].Rock and Soil Mechanics,2014,35(S2):306-312,318.
[18]刘秀秀,孙广利,孙 超.基坑设计中抗剪强度指标选取的分析[J].吉林建筑大学学报,2015,32(2):36-38.
LIU Xiu-xiu,SUN Guang-li,SUN Chao.Analysis of Selecting Shear Strength Indicators in Pit Engineering[J].Journal of Jilin Jianzhu University,2015,32(2):36-38.
[19]高彦斌,姚天骄,杨正园.饱和黏性土的总强度与基坑工程水土合算土压力分析方法[J].同济大学学报:自然科学版,2020,48(9):1296-1304.
GAO Yan-bin,YAO Tian-jiao,YANG Zheng-yuan.Total Strength of Saturated Clay and Earth Pressure in Excavation by Total Stress Analysis Method[J].Journal of Tongji University:Natural Science,2020,48(9):1296-1304.
[20]何 平.上海黏土强度变形特性及其在基坑分析中的应用[D].上海:同济大学,2019.
HE Ping.Strength and Deformation Characteristics of Shanghai Clay and Its Application in the Analysis of Excavation Engineering[D].Shanghai:Tongji University,2019.
[21]何 平,王卫东,徐中华,等.不同强度参数及水土压力计算方法对围护结构变形和内力的影响[J].建筑科学,2020,36(增1):150-157.
HE Ping,WANG Wei-dong,XU Zhong-hua,et al.Effect of Different Strength Parameters and Calculation Method of Soil and Water Pressure on the Deformation and Internal Force of Retaining Structure[J].Building Science,2020,36(S1):150-157.
[22]王浩然.上海软土地区深基坑变形与环境影响预测方法研究[D].上海:同济大学,2012.
WANG Hao-ran.Prediction Method of Deformation and Environmental Impact of Deep Excavation in Soft Soil Area of Shanghai[D].Shanghai:Tongji University,2012.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2021-08-17
基金项目:上海市浦江人才计划项目(15PJ1433500)
作者简介:何 平(1988-),男,湖南永州人,工程师,工学博士,E-mail:pinghe@alumni.tongji.edu.cn。
通信作者:王 强(1977-),男,山西忻州人,高级工程师,E-mail:Qiang.Wang@cisdi.com.cn。
更新日期/Last Update: 2021-11-01