1、_E v 8M 于 贵(M SK 2s, 610036)K1:渝黔高速公路向家坡滑坡属多层、复合式大型滑坡, 自1998年至2003年间历经数次整治,多次修建抗滑及防滑工程后均未达到预期效果, 2004年再次发生变形。滑坡一旦失稳, 会导致已建抗滑工程的链式失效并且直接危及公路安全运营, 损失难以估量, 不得已再次进行了勘察设计和工程整治。因此, 从实际调查出发, 分析研究基础资料, 认识滑坡变形的真正原因成为彻底治理滑坡的关键。通过进一步调查研究, 剖析了这一大型复杂滑坡的坡体结构和变形机理, 提出了防治工程措施, 并取得了成功, 研究成果对同类滑坡的治理具有重要的参考价值。1oM:大型复杂
2、滑坡;坡体结构;变形机理;分析ms |:P642DS M :AStructure of the slope and deformation mechanism of the largeand complex Xiangjiapo landslideYuGui(Southwest Branch of Northwest Research Institute Co., Ltd, C .R.E.C., Chengdu 610036, China)Abstract:The Xiangjiapo landslide of Chongqing-Guizhou Expressway is the multi
3、-layered and complex large-scale landslides, from 1998 to 2003, many anti-sliding and prevention projects had been carried out, but thedesired results hadn t achieved.In 2004 the landslide took place deformation again.The landslidedestabilizationwouldleadtheanti-slide projectfailure andthreatto thes
4、afety oftheexpressway .Theslopeshouldbe designed and renovated again.From the actualsurvey and based on analysis ofinformation, the awarenessofthe realreasonsoflandslidedeformation became the key pointforthe complete reinforcementof the landslide.Byfurther investigations and studies, the slope struc
5、ture and deformation mechanism of the large and complexlandslide are analyzed.The preventionand controlmethod is successful, whichis of the importantvalue for thesimilar landslide prevention.Key words:large and complex landslide;structure of slope;deformationmechanism;analysisl :2009-03-18; :2009-05
6、-27Te:L(1971-), 3(qB), ,v S,) =.0 _E 3 * K13+500K14+000 P ,) i 2 u4km 2 。y 2 TYV。1998 M45 7 H? 3v H , :M1 7? 0 # 2H , | b h、 # %n ,HM! 55 F (B F , 7 14m) r F :;1998M121999 M4W,y F 12# 54# ? 3 M, - 8 3 v , 8/,Q N。 :M B ,i1999 M9 F% !9,1n : B F 8m)9 !17 F (= F , 11 16m), H9 !y 48 F ( F , 2022m), W !C1
7、5 F rr :,BbH q, HH F%;2000 M12 BQM,s、 F M, s F /35m) 2004 M7, QM,s F , , B F MF。 B,|/Z /,T = !X,yN %Q !9,Wnm1。m1 V e V A,_E Q XJ $ ,B 45。 VnM , s )Hq、 8M , |n ,? , “y F,S, ? r。yNV L= m,s MyM 1o。1 3Hq1.1 地形地貌 u, s/ e, Mv0| , 290490m,M200m,1 q25 35,/ K, $ 3 z。1.2 地层岩性 u/d F(J1Z), CC ,# “ dEF(T3X) 。 “)
8、 r(Qdl+el4 ),z1 Fr,cv v F, ,10m。/d F C C , #?, C, E ,YV “ ) =q(nm2)。m4Q # 8 =/ V As。m2 : jE qLG , V b# d: E u, 8 E qM C CV, -/ u, y / s 。50 工程勘察 Geotechnical Investigation 20m,gg /; 25 30m, “ -。M 1 0, $ M, V?G C 7B , v V / C 、 C s H, P Bv 。3 M s_E MVC Z、: ?Z, 8,MY, Tr。 Q Mr 8Q,/ M s。3.1 堆积层滑坡的变形 !9
9、B 2H !9),y H , O Q , !9 Z q10.310.5, s I n C)、 # #?y Y7 PH ? q,#7 7?3 v H 。H - 7 P| 3 C ,Y , | b h、yB F 、 # n 。1998 M121999 M6 F B“ MM 3B , 1 yB F 3 ,N7 B“ Z。M1y F !9 ,s %)8, 3 5 = l, F ; Z , !9 1 , 6V4 A F 951 2009年第12期 工程勘察 Geotechnical Investigation F =、 ) ! O,x F F v w , H V g, % /,i1 p /B ; yBH , H 15,| 8 =#5/ , 8,N/ T(nm3); L F ,/ sBE ,T ,/ 6, , , H I n Q 8=y F , -ys M M, /T YZ M , H / T。 s, 3 TMr,V7 P Qr,yN r / s H, Ss M 1 -4。 ID1 . s M .:SM,2001.2 5, / 4, ;. / M.:SM, 2007.3 ,5, . u H h LM.: Y, 2006.53 2009年第12期 工程勘察 Geotechnical Investigation &Surveying
