田湾核电站某工程偏移基桩性状分析  

Analysis on damage properties of the inclined foundation piles of a construction in Tianwan nuclear power plant

作　　者：何剑[1] 方仁宝 张晓伟 龙建辉[2] 

机构地区：[1]核工业工程勘察院,河南郑州450002 [2]长安大学地质工程与测绘工程学院,陕西西安710054

出　　处：《地球科学与环境学报》2004年第2期63-66,共4页Journal of Earth Sciences and Environment

摘　　要：　用低应变动测法检测基桩结构完整性,其测试结果是可靠的,但在田湾核电站某子项用低应变对因滑坡而倾斜的基桩进行检测时,却发现同样是偏移较大的基桩,有的基桩断裂、破损,有的完整,从低应变测试结果很难与实际情况统一起来。考虑到基桩不是孤立的,是与地基土结合在一起的,通过利用基坑支护理论及滑坡形成的圆弧滑动面原理,并结合施工的一些实际情况,从理论上分析了滑坡后基桩断裂、破损、倾斜的可能性,从而对偏移基桩性状做出了正确判断,为工程桩的处理提供依据。Generally,it is reliable to test the integrity of foundatin pile structure by low-strain dynamical test. But while testing the inclined pile due to landslide by low-strain in some sub-item of Tianwan Nuclear Power Station,the same pile of large displacement shows different results by low-strain test in which some are broken or damaged, some are integrity. The test results are diffcult to be identical with the practice. Considering that the pile isn't isolated,but combined with the foundation soil, the excavation pit support theory and circular sliding surface theory are used in combined with the construction practice,the possibility of pile fracture,damage and incline,accordingly obtaining the correct adjustment to the inclined pile properties,and providing the foundation for the engineering pile treatment.

关 键 词：田湾核电站 低应变动力检测 水平剪力 基桩 基坑支护 圆弧滑动面 

分 类 号：TU473.1[建筑科学—结构工程]