长沙理工大学学报(自然科学版)
長沙理工大學學報(自然科學版)
장사리공대학학보(자연과학판)
Journal of Changsha University of Science and Technology(Natural Science)
2014年
1期
47-52
,共6页
何忠明%蔡军%胡庆国%成帅龙
何忠明%蔡軍%鬍慶國%成帥龍
하충명%채군%호경국%성수룡
支护参数%锚固边坡%稳定性%数值分析
支護參數%錨固邊坡%穩定性%數值分析
지호삼수%묘고변파%은정성%수치분석
support parameters%anchoring the slope%stability%numerical analysis
为分析不同支护参数对锚固高速公路风化岩质边坡稳定性的影响,通过 FLAC3D软件建立数值计算模型,采用强度折减法计算不同支护参数下的边坡安全系数。研究结果表明,锚杆间距和锚杆长度有一定的相关性,当锚杆长度为6,9,12,15 m 时,对应锚杆间距分别取1.5,1.5,2,2 m,锚杆加固效果较好;锚杆存在一定的有效锚固长度,在锚杆的有效锚固长度范围内,适当增加锚杆长度能够提高边坡安全系数;采用先短后长的长短相间和一级边坡采用短锚杆、二级边坡采用长锚杆这两种布设形式,能够更好地加固风化岩质边坡。
為分析不同支護參數對錨固高速公路風化巖質邊坡穩定性的影響,通過 FLAC3D軟件建立數值計算模型,採用彊度摺減法計算不同支護參數下的邊坡安全繫數。研究結果錶明,錨桿間距和錨桿長度有一定的相關性,噹錨桿長度為6,9,12,15 m 時,對應錨桿間距分彆取1.5,1.5,2,2 m,錨桿加固效果較好;錨桿存在一定的有效錨固長度,在錨桿的有效錨固長度範圍內,適噹增加錨桿長度能夠提高邊坡安全繫數;採用先短後長的長短相間和一級邊坡採用短錨桿、二級邊坡採用長錨桿這兩種佈設形式,能夠更好地加固風化巖質邊坡。
위분석불동지호삼수대묘고고속공로풍화암질변파은정성적영향,통과 FLAC3D연건건립수치계산모형,채용강도절감법계산불동지호삼수하적변파안전계수。연구결과표명,묘간간거화묘간장도유일정적상관성,당묘간장도위6,9,12,15 m 시,대응묘간간거분별취1.5,1.5,2,2 m,묘간가고효과교호;묘간존재일정적유효묘고장도,재묘간적유효묘고장도범위내,괄당증가묘간장도능구제고변파안전계수;채용선단후장적장단상간화일급변파채용단묘간、이급변파채용장묘간저량충포설형식,능구경호지가고풍화암질변파。
To study different support parameters on anchoring the weathered rock slope sta-bility,a numerical calculation model was established by FLAC3D,and the safety factor of the slope was calculated by the method of Lagrange strength reduction .The analysis results show that,(1)There is an certain relationship between spacing and length of anchor bolt. When the anchor length was 6,9,12 m or 15 m,anchor spacing was set for 1.5,1.5,2,2 m, which can better improve the stability of the slope;(2 )Tere is an effective anchorage length.Lengthening anchor in the valid range properly can increase the slope safety factor;(3)Short first of long-short layout and the first layer of the slope with short bolts,the sec-ond layer of the slope with long bolts,which can better improve the stability of the weath-ered rock slope.