第
11
卷二增刊
1
2015
年
7
月
地下-空间-与二
E
程学报
Chinese JoumaI of Underground Space and Engineering
渗流作用的深基坑两级边坡稳定性分析*
卢玉林
1
,
2
陈晓冉
3
王丽
2
卢滔
2
v
口
Hl
Jul,2015
(1.中国地震局工程力学研究所,哈尔滨
150080;2.
防灾科技学院防灾工程系,北京
101601
;
3.
河北工程大学资源学院,河北部嘟
065038)
摘
要:通过渗流与应力的相合作用分析了两级边坡的三维应力场特点,随后运用有限元
强度折减法探讨了渗流作用下的边坡稳定性及影响因素。结果表明相合法的数值要高于不相
合法,与边坡实际变形更为接近,证明了搞合模式的效果是明显的。随着平台宽度,倾角的增
加,两级边坡的滑动面由羊一面向双滑面发展,滑动区域也将随倾角的增加而逐渐减小。渗流
的搞合作用造成底部坡体变形要小于上部坡体,水休约束了土体的横向变形,抑制坡体的下
滑,研究的成果可为多级边坡的渗透破坏模式提供理论指导。
关键词:渗流;两级边坡;稳定性;平台宽度;倾角
中图分类号:
TU478
文献标识码
:A
文章编号:
1673-0836
(
2015)
增
1-0295
同
07
Analysis of the Double-step Slope Stability for
Deep
Foundation Pit with the Seepage
Lu
Yulin
1
,2 ,
Chen
Xiaoran
3
,
Wang
Li2 ,
Lu
Tao
2
(
l.
lnstitute
0/
Engineering
Mechan
巾,
China Earthquake Administration , Harbin 150080, China;
2.
Depart
阳
nt
0/
Dis
ω
ter
Prevention Engineering , lnstitute
0/
Dis
ω
ter
Prevention , Beijing 101601 , P. R. China ;
3.
College
0/
Resources , Hebei University
0/
Engineering , Handan , Hebei 065038 , P. R. China)
Abstract:
According to the mutually coupling effect between the seepage and stress in the soil , the double-step
slope 3D stress field characteristic is analyzed
, and then the stability of sIope is researched by the strength reduction
finite element method
, and the influence factors are also discussed in this study. The results show that the coupling
data is larger than no coupling method resu
1t
s and the error is more minor compared with the monitoring point' s field
test data
, thus it proves that the mutually coupling effect is obvious.
Th
e double-step sIope' s slip surface will extend
gradually
to
two-slip surface
from
the single arc
surface
机
th
the platform width and obliquity increased, but the slip
area will decrease
wi
出
the
obliquity enlarged. The slope deformation will be decreased due
to
the seepage effect , and
the water constraints the bottom
soil'
s level deformation and slide. Therefore , the research results can provide a
theoretical guidance for the multi-step slope seepage collapse.
Key
words:
seepage; double-step slope; stability; platform width; obliquity
*
收稿日期
:2014-06-18(
修改稿)
作者简介:卢玉林(1
983-)
,男,北京人,博士,讲师,主要从事土木工程、地下工程等领域的教学与科研工作。
E-mail: yllu@cidp.edu.cn
基金项目:中国地震局教师科研基金
(20120103)
;中央高校基本科研业务费专项资金创新团队资助计划项目
(ZY20110102)
;国家自然科学基金
(51208108
)