山西建筑
山西建築
산서건축
SHANXI ARCHITECTURE
2014年
28期
140-141,142
,共3页
路堤%应力%折减系数
路隄%應力%摺減繫數
로제%응력%절감계수
embankment%stress%reduction coefficient
通过二维数值模拟对桩承式路堤平面土拱应力折减系数进行了分析，探讨了影响折减系数的因素及其变化规律，结果表明：抗剪强度高的土体，应力折减系数较小，土拱效应作用显著，在一定范围中填土高度的增加，使得土拱效应逐渐形成，应力折减系数逐渐减小，土拱效应逐渐增强；桩净间距的增大或桩径的减小，都会使得应力折减系数增大，削弱了土拱效应的发挥程度。
通過二維數值模擬對樁承式路隄平麵土拱應力摺減繫數進行瞭分析，探討瞭影響摺減繫數的因素及其變化規律，結果錶明：抗剪彊度高的土體，應力摺減繫數較小，土拱效應作用顯著，在一定範圍中填土高度的增加，使得土拱效應逐漸形成，應力摺減繫數逐漸減小，土拱效應逐漸增彊；樁淨間距的增大或樁徑的減小，都會使得應力摺減繫數增大，削弱瞭土拱效應的髮揮程度。
통과이유수치모의대장승식로제평면토공응력절감계수진행료분석，탐토료영향절감계수적인소급기변화규률，결과표명：항전강도고적토체，응력절감계수교소，토공효응작용현저，재일정범위중전토고도적증가，사득토공효응축점형성，응력절감계수축점감소，토공효응축점증강；장정간거적증대혹장경적감소，도회사득응력절감계수증대，삭약료토공효응적발휘정도。
This paper analyzed the pile supported embankment plane soil arch stress reduction coefficient using two-dimensional numerical simu-lation, discussed the factors and variation law influence of reduction coefficient, the results showed that: the soil with high shear strength, the stress reduction coefficient was small, the soil arching effect outstanding, increased the soli fill height in a certain range, made the soil arching effect gradually formed, the stress reduction coefficient decreased, the soil arching effect gradually increased;the increase of pile diameter spac-ing or reduce of pile diameter, will increase the stress reduction coefficient, reduced the degree of soil arching effect.
