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Research on the Applicability of ADECO-RS
in a Water-Rich Sand Stratum
(1 Qingdao Metro Group Co. Ltd., Qingdao 266000; 2 Ocean University of China, Qingdao 266100;
3 Beijing Urban Engineering Design Research institute Co. Ltd., Beijing 100037)
Abstract ADECO-RS, i.e. "toroidal horizontal jet grouting pile + advance grouting pipe", is adopted in the Qingdao metro for the reinforcement of a water-rich sand stratum characterized by being soft at the top and hard on the bottom. The pile-forming effect and problems regarding horizontal jet grouting piles for different sand layers are studied through field sampling and observation. The impact of ADECO-RS on construction and the surrounding environment is analyzed by field monitoring and measuring. The results show that the application of ADECO-RS has an obvious positive effect on settlement control, and there are many problems, such as water leakage induced by the misalignment of two piles and ground uplift caused by improper grouting pressure control. In order to overcome these problems encountered during construction, the pile body is controlled both horizontally and vertically, and tracking monitoring is used for the grouting process. The construction results prove the applicability of ADECO-RS for use in water-rich sand strata.
Abstract：
ADECO-RS, i.e. "toroidal horizontal jet grouting pile + advance grouting pipe", is adopted in the Qingdao metro for the reinforcement of a water-rich sand stratum characterized by being soft at the top and hard on the bottom. The pile-forming effect and problems regarding horizontal jet grouting piles for different sand layers are studied through field sampling and observation. The impact of ADECO-RS on construction and the surrounding environment is analyzed by field monitoring and measuring. The results show that the application of ADECO-RS has an obvious positive effect on settlement control, and there are many problems, such as water leakage induced by the misalignment of two piles and ground uplift caused by improper grouting pressure control. In order to overcome these problems encountered during construction, the pile body is controlled both horizontally and vertically, and tracking monitoring is used for the grouting process. The construction results prove the applicability of ADECO-RS for use in water-rich sand strata.
SUN Fu-Feng-1,
LIU ,
TAO 2 etc
.Research on the Applicability of ADECO-RS
in a Water-Rich Sand Stratum
[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(1): 171-178
2014, Vol. 51 