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一种新型基础的基底反力及内力测试 - Journal of Northeastern
第28 卷第5期 东 北 大 学 学 报 ( 自 然 科 学 版 ) Vol128, No. 5
2 00 7 年 5 月 Journal of Northeastern U ni ersity( Natural Science) M ay 2 0 0 7
1 1 2
李 纯, 朱浮声 , 潘秀艳
( 1. , 110004; 2. , 110005)
: GYH-2 GJL-2 / 0
, ,
, 30% , ,
#
, 22%
#
#
: ; ; ; ;
: T U 740 : A : 1005-3026( 2007) 05-0745-04
Testing for Ground Back Pressure Acting on Bottom of aNew-
Type Foundation and Its Stress Distribution
1 1 2
L I Chun , ZH U Fu-sheng , PA N X iu-yan
( 1. School of Resources Ci il Engineering , Northeastern Uni ersity, Shenyang 110004, China;
2. Reconnaissance Design Co. of Liaoning Highroad, Shenyang 110005, China. Correspondent: LI Chun, E-
mail: chunl-i mail @ 163. com)
Abstract: The GYH-2 membrane case manometer and GJL-2 reinforcement stressometer w ere
used to test the ground back pressure acting on the bottom of a new-type spread foundation
integrated w ith concrete slab and its stress distribution. First-hand dynamic data were thus
monitored and recorded to generalize the actual distributions of the back pressure and foundationÄs
stress. Testing results show ed that the concrete slab can take on about 30% load of upper
structure; stress of reinforcements change alternately; the maximum tensile stress occurs at the
midspan of slab and the maximum alue of stress is about 22% lower than allow able strength of
reinforcements. This conclusion offers directly a reference for designing the spread foundation
integrated w ith concrete slab.
ey words: proportion of ground back pressure; alternate stress; distortion; internal force;
spread foundation
,
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