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Technology in Construction of Deep Karst TunnelIOMs VE3UdAr UNdg Railway 1 8th Bureau Group Co., Ltd., Tianjin 30 0 2 2 2 , ChinaLsjcCT.cO T a k i n g a k a r s t t u n n e l p r o j e c t a s a n e x a m p l e, t h e a p p l i c a t i o n of rigid soft c o m b i n e d g r o u t i n g s u p p o r t t e c h n o l o g y
in t h e c o n s t r u c t i o n of d e e p k a r s t t u n n e l is c o m p a r e d a n d a n a l y z e d b y m e a n s of 3D n u m e r i c a l s i m u l a t i o n a n d field
m o n i t o r i n g. T h e r e s u l t s s h o w t h a t, u s i n g rigid soft c o m b i n e d g r o u t i n g s u p p o r t, t h e flexible m a t e r i a l c a n r e l e a s e t h e
s t r e s s of s u r r o u n d i n g r o c k, w h i l e t h e rigid m a t e r i a l c a n transfer t h e s t r e s s to t h e a r c h f o o t, w h i c h e n s u r e s t h e stability
of t u n n e l s e c t i o n; after t h e o p t i m i z a t i o n s c h e m e is a d o p t e d, a c c o r d i n g to t h e a c t u a l m o n i t o r i n g d a t a, t h e c o n v e r g e n c e
t i m e of s e t t l e m e n t a n d d e f o r m a t i o n is a d v a n c e d a n d t h e overall d e f o r m a t i o n is r e d u c e d, w h i c h p l a y s a n i m p o r t a n t role in
controlling t h e stability of k a r s t t u n n e l.奖品范项台发化新间 rigid soft c o m b i n e d g r o u t i n g s u p p o r t t e c h n o l o g y; d e e p k a r s t t u n n e l; s t r e s s; d e f o r m a t i o nK ? hSs f ? h \???c ??NS ? ?U???
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