水平荷载下承力盘位置对新型混凝土扩盘桩弯曲型破坏状态影响研究
引用文献：
罗立强 钱永梅 洪光 牛雷 刘家良. 水平荷载下承力盘位置对新型混凝土扩盘桩弯曲型破坏状态影响研究[J]. 建筑结构，2022，48（12）：134-138.
LUO Liqiang QIAN Yongmei HONG Guang NIU Lei LIU Jialiang. Research on influence of bearing plate position on bending failure state of new type concrete expansion plate pile under horizontal load[J]. Building Structure，2022,48（12）：134-138.
摘要：承力盘参数对新型混凝土扩盘桩(NT-CEP桩)的承载性能具有一定影响，其中承力盘位置在NT-CEP桩抵抗水平荷载时较为重要。采用半截面桩小模型原状土试验方法对4个承力盘顶部到桩顶的距离分别为50、90、130、170mm的NT-CEP桩进行了试验，采用ANSYS有限元软件对7个承力盘顶部到桩顶距离分别为1 500、2 100、2 700、3 300、3 900、4 500、5 100mm的NT-CEP桩进行了模拟。对比分析了水平荷载作用下NT-CEP桩不同承力盘位置对桩周土体破坏状态以及NT-CEP桩抗倾覆能力的影响，确定水平荷载作用下承力盘位置对NT-CEP桩承载力的影响规律：承力盘距离桩顶越近，NT-CEP桩抵抗水平荷载能力越强。最后，根据试验和模拟结果，完善了NT-CEP桩在水平荷载作用下的计算公式，为NT-CEP桩在实际工程中的应用及设计提供了可靠的理论基础。
关键词：新型混凝土扩盘桩；水平荷载；承力盘位置；弯曲型破坏；桩周土体破坏状态
基金：吉林省科技厅人才专项项目（20210509042RQ）。
尊敬的用户，本篇文章需要2元，点击支付交费后阅读
限时优惠福利：领取VIP会员
全年期刊、会议视频
全部免费！培训视频打折！
全年期刊、会议视频
全部免费！培训视频打折！
参考文献[1] 王安福，张国梁.挤扩支盘桩承载特性及其应用发展[J].广东公路交通，2019,45(5):35-41.
[2] 黄子轩，钱永梅.水平力作用下混凝土扩盘桩研究现状分析[J].山西建筑，2017,43(19):60-62.
[3] WANG YANLI,CHENG ZHANLIN,WANG YONG.Effects of liquefaction-induced large lateral ground deformation on pile foundations[J].Journal of Central South University,2013,20(9):2510-2518.
[4] 钱永梅，周婷婷，田伟.细粉砂土含水率对混凝土扩盘桩抗压破坏影响试验研究[J].建筑结构，2020,50(11):119-122.
[5] 钱永梅，张冠群，田伟.混凝土扩盘桩的半面桩小模型试验方法研究[J].建筑结构，2018,48(S1):742-748.
[6] 张延庆，文平.基于滑移线理论的支盘成型过程对桩周土的扰动分析[J].河北工业科技，2018,35(4):255-261.
[7] 王洁.盘径对水平力作用下扩盘桩土体破坏状态影响研究[D].吉林：吉林建筑大学，2017.
[2] 黄子轩，钱永梅.水平力作用下混凝土扩盘桩研究现状分析[J].山西建筑，2017,43(19):60-62.
[3] WANG YANLI,CHENG ZHANLIN,WANG YONG.Effects of liquefaction-induced large lateral ground deformation on pile foundations[J].Journal of Central South University,2013,20(9):2510-2518.
[4] 钱永梅，周婷婷，田伟.细粉砂土含水率对混凝土扩盘桩抗压破坏影响试验研究[J].建筑结构，2020,50(11):119-122.
[5] 钱永梅，张冠群，田伟.混凝土扩盘桩的半面桩小模型试验方法研究[J].建筑结构，2018,48(S1):742-748.
[6] 张延庆，文平.基于滑移线理论的支盘成型过程对桩周土的扰动分析[J].河北工业科技，2018,35(4):255-261.
[7] 王洁.盘径对水平力作用下扩盘桩土体破坏状态影响研究[D].吉林：吉林建筑大学，2017.
Research on influence of bearing plate position on bending failure state of new type concrete expansion plate pile under horizontal load
Abstract: The parameters of the bearing plate have a certain influence on the bearing performance of the new type concrete expansion plate pile, and the position of the bearing plate is important when the NT-CEP pile resists horizontal loads. The semi-section pile small model undisturbed soil test method was used to stimulate four NT-CEP piles with the distance from the top of bearing plate to the top of pile ranging from 50, 90, 130 to 170 mm respectively. The ANSYS finite element software was used to stimulate seven NT-CEP piles, with the distance from the top of bearing plate to the top of pile ranging from 1500, 2100, 2700, 3300, 3900, 4500 to 5100 mm respectively. The effect of different bearing plate positions of NT-CEP piles on the failure state of soil around the piles and the anti-overturning ability of NT-CEP piles under horizontal loads were compared and analyzed, and the influence law of bearing plate position on the bearing capacity of NT-CEP piles under horizontal loads was determined: the closer the bearing plate is to the pile top is, the stronger the ability of NT-CEP pile is to resist horizontal load. Finally, according to the test and simulation results, the calculation formula of NT-CEP pile under horizontal loads was improved, which provided a reliable theoretical basis for the application and design of NT-CEP pile in practical engineering.
Keywords: new type concrete expansion plate pile; horizontal load; position of bearing plate; bending failure; failure state of soil around pile
408
0
0