Abstract:Based on the field tests on squeezed branch piles and piles with equivalent diameter, the static load tests on single pile and the test results of pile body resistance are studied and analyzed. The study indicates that load-settlement curve of squeezed branch piles changes slowly, and the piles behave mechanical features of end-bearing pile under the action of vertical load. The nature of foundation soils, span and diameter of piles, diameter and amount of plates and vertical spacing between piles are the main factors to influence bearing capacity of squeezed branch piles. The tests and study results provide valuable parameters and experimental data for engineering application of squeezed branch piles. In the engineering case, compared with that of the traditional borehole piles, the bearing capacity of single squeezed branch pile is increased by 89%, and the construction cost is saved by 28%.
陈飞, 吴开兴, 何书. 挤扩支盘桩承载力性状的现场试验研究[J]. 岩土工程学报, 2013, 35(zk2): 990-993.
CHEN Fei, WU Kai-xing, HE Shu. Field tests on load transfer performances of squeezed branch piles. Chinese J. Geot. Eng., 2013, 35(zk2): 990-993.
[1] 徐至钧, 张晓玲, 张国栋.新桩型挤扩支盘灌注桩设计施工与工程应用[M]. 2版. 北京: 机械工业出版社, 2007. (XU Zhi-jun, ZHANG Xiao-ling, ZHANG Guo-dong. New type pile-construction and application of squeezing spreading tray pile[M]. 2nd ed. Beijing: Mechanical Industry Publishing House, 2007. (in Chinese)) [2] 巨玉文, 梁仁旺, 赵明伟. 竖向荷载作用下挤扩支盘桩的试验研究及设计分析[J]. 岩土力学, 2004, 25(2): 308-311, 315. (JU Yu-wen, LIANG Ren-wang, ZHAO Ming-wei. Experimental investigation and design analysis of vertically loaded cast-in-situ pile with expanded branches and plates[J]. Rock and Soil Mechanics, 2004, 25(2): 308-311, 315. (in Chinese)) [3] 邓友生, 龚维明, 韩金生, 等. 挤扩支盘灌注桩承载特性试验研究[J]. 铁道学报, 2005, 27(6): 122-127. (DENG You-sheng, GONG Wei-ming, HAN Jin-sheng, et al. Experimental study on bearing characteristic of compaction—under reamed bored pile[J]. Journal of the China Railway Society, 2005, 27(6): 122-127. (in Chinese)) [4] 王遇国, 梅志荣, 张秀超. 单桩承载性状试验研究[J]. 岩土工程学报, 2010, 32(1): 7-11. (WANG Yu-guo, MEI Zhi-rong, ZHANG Xiu-chao. Research on behavior of a single pile[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(1): 7-11. (in Chinese)) [5] 李 枫, 宋焕豹, 周云东. 挤扩支盘桩的承载特性[J]. 河海大学学报(自然科学版), 2010, 38(2): 202-205. (LI Feng, SONG Huan-bao, ZHOU Yun-dong. Bearing behaviors of squeezed branch piles[J]. Journal of Hohai University (Natural Sciences), 2010, 38(2): 202-205. (in Chinese))