摘要
通过连盐铁路中山河特大桥桩基础单桩静载试验,对桩身应变、压缩量及桩顶沉降进行测试,利用试验结果对有限元模型进行修正,研究软土地区铁路桥梁桩基的荷载传递特性及沉降控制效果。结果表明:理论和试验曲线吻合较好,桩周土体的土性变化对桩身轴力传递和沉降的影响很大,在软土地区采用超长钻孔灌注桩能较好地控制桥梁基础沉降。
The load transfer characteristics and settlement control effect of railway bridge pile foundation in soft soil area was studied through single pile static load test, pile shaft strain test, pile shaft compression test and pile top settlement test on extra-large bridge pile foundation of Zhongshan River of Lianyungang—Yancheng Railway. The finite element model is verified by the experimental results. The results show that the theory curve is well agreed with the test curve. The properties of the soil around the pile greatly influence on the axial force transfer and settlement of pile shaft. The super-long bored piles can effectively control the settlement of bridge foundation in soft soil.
作者
赵大亮
ZHAO Daliang(China Railway Fifth Survey and Design Institute Group Co., Ltd., Beijing 102600, China)
出处
《路基工程》
2019年第6期119-122,共4页
Subgrade Engineering
基金
苏北软土地区桥梁基础设计研究(科研T5Y2014-D01)
关键词
软土地区
桥梁桩基
超长桩
有限元
沉降控制
soft soil area
bridge pile foundation
super-long pile
finite element
settlement control
