Application of Research the mMulti-head Sstirring Ppile and Hhigh-pressure Rrotary Jjet Ggrouting Ppile applied in Cut-off Sseepage Pproject
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Abstract:
Based on the engineering example of the emergency water source area in Taicang, the measured results in the well test using the multi-head stirring pile and high-pressure rotary jet grouting pile methods were compared, and Two construction methods’ principle , characteristics and the main applicable scope for multi-head stirring pile and high-pressure rotary jet grouting pile are introduced simply. Combined with the engineering example and compared with measured results in the well test by the use of the AUTOBANK (hydraulic finite element analysis system) was used to establish thea seepage stability and anti-sliding stabilitystabilities models. The, the principle and the main formula of the modelsle were introduced,are explained and all conditions of the seepage stability and anti-sliding stabilitystabilities are were calculated under different working conditions. According to tThe results showed that (1) , in the earth dam seepage, the high-pressure rotary jet grouting pile and multi-head stirring pile form a continuous wall which has a uniform permeability coefficient is close and both can meet the design requirements of anti-seepage; (2) the .The pile body formed by the high-pressure rotary jet grouting pile is characterized by?poor continuity and core sample integrity degreecompleteness and weak spray hole position weak; and (3) while the wall formed by the multi-head stirring pile is even, has following such advantages as wall to be even , has good relative overlap, relative lap good, and the completeness of the dam is not affected by the construction technology. not to destroy the integrity of the original earth dam.Moreover, Thus the muti-head stirring pile has remarkable superiority in the construction quality, cost, and construction efficiency and low impact on the construction environment. Based on the multiple characteristics and advantagesConsequently, the multi-head stirring pile will can be widely used in all kinds of cut-off seepage projects.
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