|
|
|
| Application of Multi-span Continuous Beam Model in the Bearing Plate Design of Pile-blank Subgrade |
| GUO Shuaijie |
| China Railway Design Corporation, Tianjin 300308, China |
|
|
|
Abstract Research purposes:Pile-blank subgrade is widely used in actual application scenarios, such as high-speed railway, heavy haul railway, side widening, station subgrade and road-bridge transition section, and has the technical characteristics of light weight, strong bearing capacity and reliable structure. However, its technical design still seriously depends on empirical method and simulation analysis. In order to obtain the analytical solution for the internal force distribution of bearing plate, multi-span continuous beam model was applied in the condition of pile-soil-plate joint action to determine the distribution characteristics of internal force and deflection deformation in transverse and longitudinal direction.
Research conclusions:(1) Upper load is mainly transmitted to the pile top through bearing plate, and the bearing plated deformation is generally no more than 0.5 mm, and 1.0-meter-thick bearing plate has sufficient section stiffness during general design conditions, which can meet the general design conditions. (2) The bidirectional driving is the most unfavorable load factor in latitudinal direction, and the negative bending moment at pile top is much higher than the one at the span middle. (3) Internal force distribution in longitudinal direction is more complex, and the internal force and deformation at the side span are much higher than that at the middle span, so unequal pile layout in longitudinal direction is more reasonable. (4) The research results can be applied in the bearing plate design and reinforcement calculation for pile-blank subgrade structure.
|
|
Received: 11 July 2022
|
|
|
|
|
|
| [1] |
岳永兴. 沪杭客专桩板结构路基三维动力仿真分析[J]. 铁道工程学报, 2013(9):23-29.Yue Yongxing. Three-dimensional Dynamic Simulation Analysis of Pile-slab Structure Subgrade of Shanghai-Hangzhou Passenger Dedicated Line[J]. Journal of Railway Engineering Society, 2013(9):23-29.
|
| [2] |
温晓鹏, 陈效星. 重载铁路路基桩板结构计算分析研究[J]. 路基工程, 2015(6):136-139.Wen Xiaopeng, Chen Xiaoxing.Calculation and Analysis Research on Pile Plate Structure for Subgrade of Heavy Haul Railway[J]. Subgrade Engineering, 2015(6):136-139.
|
| [3] |
魏丽敏, 李双龙, 何群, 等. 深埋式桩板结构桥隧过渡段动力特性研究[J]. 铁道学报, 2021(1):141-148.Wei Limin, Li Shuanglong, He Qun, etc. Study on Dynamic Characteristics of Deep-buried Pile-slab Subgrade in Bridge-tunnel Transition Section[J]. Journal of the China Railway Society, 2021(1):141-148.
|
| [4] |
隋孝民, 许志勇. 桩板结构在强发育岩溶无砟轨道中的应用研究[J]. 铁道工程学报, 2015(4):55-59.Sui Xiaomin, Xu Zhiyong. Application Study of the Structure of RC Pile-plank in Strong Development of Karst and Ballastless Track Railway[J]. Journal of Railway Engineering Society, 2015(4):55-59.
|
| [5] |
李传宝. 桩板结构处理高铁采空区路基变形监测研究[J]. 铁道工程学报, 2019(2):33-37.Li Chuanbao.Settlement Monitoring Test on High-speed Railway Subgrade above Goafs Reinforced by Pile-plank Structure[J]. Journal of Railway Engineering Society, 2019(2):33-37.
|
| [6] |
张树明, 蒋关鲁, 杜登峰, 等. 新型桩板结构路基在季节冻土区的适用性[J]. 西南交通大学学报, 2021(3):541-549.Zhang Shuming, Jiang Guanlu, Du Dengfeng, etc. Applicability of Novel Pile-plank Embankment in Seasonally Frozen Regions[J]. Journal of Southwest Jiaotong University, 2021(3):541-549.
|
| [7] |
吕玺琳, 马泉. 高铁复合结构路基荷载传递及沉降数值模拟[J]. 铁道工程学报, 2018(7):1-6.Lv Xilin, Ma Quan. Numerical Research on the Load Transfer and Settlement of Composite Structural Subgrade of High-speed Railway[J]. Journal of Railway Engineering Society, 2018(7):1-6.
|
| [8] |
肖宏, 龚小平. 基于位移法的桩板结构理论分析方法研究[J]. 路基工程, 2013(5):15-18.Xiao Hong, Gong Xiaoping. Study on Theoretical Analysis Method for Pile-slab Structure Based on Displacement Method[J]. Subgrade Engineering, 2013(5):15-18.
|
| [9] |
郭帅杰, 宋绪国, 陈洪运. 基于Winkler理论悬臂U型路基底板分析方法[J]. 路基工程, 2021(4):46-51.Guo Shuaijie, Song Xuguo, Chen Hongyun.Analysis Method of Cantilever U-shaped Subgrade Slab Based on Winkler Theory[J]. Subgrade Engineering, 2021(4):46-51.
|
|
|
|
2022, Vol. 39 
