|
|
Application of Vacuum-heaped Load Preloading Technology in Treating Soft Subgrade in Experimental Section |
SONG Shang-ming |
China Railway Group Limited, Beijing 100055, China |
|
|
Abstract Research purposes:Based on one example of application of the vacuum-heaped load preloading technology in treating soft subgrade in the experimental section, the introduction is given to the key points of this construction technology and the discussion is made on the method for the settlement estimation.
Research conclusions:During treating the soft subgrade with vacuum-heaped load preloading, it is necessary to follow the principle of guaranteeing good permeability of drainage system and air tightness of vacuum system, and control the construction quality of sand bedding, plastic drainage board, pipe network, sealing membrane, sealing grove and vacuum pump. From verification, it is found the calculated results with the commonly used "equivalent load methods" are different from the actualmeasured results to some extent, and from the analysis, it is thought the main reasons for the differences between the calculated results and the actually measured results are the vertically transferred depth of the vacuum degree and the lateral deformation of soil were not considered. How to accurately consider these two factors needs to be further discussed.
|
Received: 30 November 2009
|
|
|
|
|
[ 1 ] 铁道第四勘察设计院. 昆山试验工点软土地基工程特性研究阶段报告[R]. 武汉:铁道第四勘察设计院, 2003.
Fourth Railway Survey and Design Institute of China Ministry of Railways. The Research Report of Soft soil Engineering Properties on Kunshan Experimental Work Sites[R]. 2003.
[ 2 ] 苗中海, 李立新. 塑料排水板打设工程质量初步分析调查与分析[C] / /第四届塑料排水板法加固软基技术研讨会论文集. 南京:河海大学出版社, 2000:20-21.
Miao zhonghai, Li lixin. The Preliminary Survey and Analysis of Plastic Drainage Plate Construction Engnineering Quality[C]/ /The Essays of the Fourth Seminar on the Reinforcement of Soft-based Technology by Plastic Drainage Plate. Nanjing: Hehai University Press, 2000:20-21.
[ 3 ] 娄炎. 真空排水预压加固软土技术[M]. 北京:人民交通出版社, 2002.
Lou Yan. The Technique of Treating Soft Soil by Vacuum Preloading and Drainage[M]. Nanjing:People’s Communications Press, 2002.
[ 4 ] 钱家欢, 殷宗泽. 土工原理与计算[M]. 北京:中国水利水电出版社, 1996.
Qian Jiahuan, Yin Zongze. Principle and Calculation of Geotechnical[M]. Beijing:China Water Power Press,1996.
[ 5 ] 张诚厚. 高速公路软基处理[M]. 北京:中国建筑工业出版社, 1997.
Zhang Chenghou. Expressway Soft Foundation Treatment[M]. Beijing:China Building Industry Press, 1997.
[ 6 ] 李时亮. 真空—堆载联合预压地基沉降计算方法分析[J]. 铁道标准设计, 2006(12):8-10.
Li Shiliang. The Analysis of the Settlement Estimate Method of Treating Soft Base by Vacuum-heaped Load Combining Preloading[J]. Railway Standard Design,2006(12):8-10.
|
|
|
|