岩土工程学报2012，Vol.34Issue(4)：693-700,8.
高承载素混凝土桩复合地基现场试验研究
Field tests on high-bearing composite foundation with plain concrete piles
陶景晖 1梁书亭 2樊有维 3张永乐 4陶茂之5
作者信息
- 1. 东南大学土木工程学院,江苏南京210096／江苏省建筑设计研究院有限公司,江苏南京210029
- 2. 东南大学土木工程学院,江苏南京210096
- 3. 江苏华东地质建设集团,江苏南京210007
- 4. 江苏省建苑岩土工程勘测有限公司,江苏南京210029
- 5. 江苏省建筑设计研究院有限公司,江苏南京210029
- 折叠
摘要
Abstract
The composite foundation with plain concrete piles is applied in the construction of a high-rise building. Various in-situ loading tests and stress tests of piles and soil are performed after excavation of foundation pits. The settlement and stress variations of the composite foundation are monitored during the construction period. Based on the test data, the work mechanism, load sharing characteristics of composite foundation, stress distribution of the piles, and settlement characteristics of the foundation are analyzed. Moreover, the effects of post-grouting technology of the piles on the work performances of the composite foundation are evaluated. The test results indicate that the composite foundation with plain concrete piles exhibits high bearing and small deformation capacities. The reinforcement without soil compaction technology has a reinforcing effect on the soil among piles. The application of post-grouting technology can improve the bearing capacity and reduce the settlement of the composite foundation, and high loading level may result in better reinforcing effects, The rigidities of the foundation slab and upper structure provide certain adjustment for non-uniform loads on piles. As a result, a variable rigidity design method based on the distribution of load and foundation pressure is proposed.关键词
高层建筑/大荷载/素混凝土桩/刚性桩复合地基/原位试验/桩土应力比/后注浆技术Key words
high-rise building/high load/plain concrete pile/rigid pile composite foundation/in-situ test/pile-soil stress ratio/post-grouting technology分类
建筑与水利引用本文复制引用
陶景晖,梁书亭,樊有维,张永乐,陶茂之..高承载素混凝土桩复合地基现场试验研究[J].岩土工程学报,2012,34(4):693-700,8.
