Vertical and horizontal loading tests on full-scale preloaded and prestressed geogrid-reinforced soil structures
Vertical and horizontal loading tests on full-scale preloaded and prestressed geogrid-reinforced soil structures
复制标题
DOI：
10.3208/sandf.45.75
复制
发表时间：
2005-12
影响因子：
3.7
通讯作者：
T. Uchimura;Y. Tamura;M. Takeyama;I. Tanaka;F. Tatsuoka
中科院分区：
文献类型：
--
作者：
T. Uchimura;Y. Tamura;M. Takeyama;I. Tanaka;F. Tatsuoka
摘要通过对某铁路预加预应力土工格栅加筋土桥墩在使用约3.5年后进行的竖向荷载试验，对该桥墩的性能进行了评价。在施工过程中，以及在服务期间的预压阶段的性能进行了比较。测试结果证实了桥墩的高性能（即，在列车通过期间非常小的瞬时变形和在服务期间由长期交通负荷引起的相当小的残余变形）可以归因于预加载和预应力过程。同时进行水平荷载试验的顶部钢筋混凝土块的预载预应力桥墩和土工格栅加筋土桥台，这是没有PLPS程序建造的同一座桥。结果表明，桥墩在抗倾覆力矩和水平剪切荷载方面比桥台稳定得多，这表明PLPS程序也非常有效地实现了高地震稳定性。
ABSTRACT The performance of a preloaded and prestressed (PLPS) geogrid-reinforced soil pier constructed for a railway was evaluated by vertical loading tests performed after a service period of about 3.5 years. The performance was compared with those at the preloading stage during construction as well as during service. The test results confirmed that the high performance of the pier (i.e., very small transient deformation during train passing and substantially small residual deformation by long-term traffic load during service) can be attributed to the preloading and prestressing procedure. Horizontal loading tests were performed simultaneously on the top RC blocks on the preloaded-prestressed pier and the geogrid-reinforced soil abutment, which was constructed without the PLPS procedure for the same bridge. The results showed that the pier was substantially more stable against over-turning moment and horizontal shear load than the abutment, indicating that the PLPS procedure is also very effective to achieve a high seismic stability.