Abstract：Abstract：Research purposes： When build ballastless track railway in the karst region with strong development, the district which is conditional to set bridge selects bridges，but for the station throat area without the condition of bridge，the high fill subgrade design is a difficult problem, because filling the embankment will increase the additional load of karst roof, accelerate the occurrence of karst collapse. How to take measures to control the influence of the subgrade filling on karst, reduce the impact of karst collapse on safety and stability of subgrade, and control the compression settlement of covered soil on karst is the key to solve the problem.
Research conclusions：The embedded type RC pile-plank with joist is the use of the upper bearing plank，the load will transmit to the pile, the pile will transfer load to the stable bedrock, both can solve the problem of karst ground treatment, and avoid the additional load of the filling against karst roof. The type RC pile-plank with joist has good integrity and stability. Its stress calculation changes from multiple pile of statically indeterminate structure to statically determinate structure, simplifies the calculation. It can be used for basal uneven hardness and difficult control of differential settlement of subgrade design, and has a good technical and economic superiority, can be applied in similar mountain railway engineering.
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, 32(4): 54-.
SUI Xiao-min，XU Zhi-yong. Application Study of the Structure of RC Pile-plank in Strong Development of Karst and Ballastless Track Railway. 铁道工程学报, 2015, 32(4): 54-.
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GB 50010—2010, Code for Design of Concrete Structure ［S］.
［4］TB 10005—2010, 铁路混凝土结构耐久性设计规范［S］.
TB 10005—2010, Code for Durability Design on Concrete Structure of Railway［S］.
［5］TB 10035—2006, 铁路特殊路基设计规范［S］.
TB 10035—2006, Code for Design on Special Subgrade of Railway［S］.
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［6］JGJ 94—2008,建筑桩基技术规范［S］.
JGJ 94—2008, Technical Code for Building Pile Foundations［S］.
［7］GB 50007—2011,建筑地基基础设计规范［S］.
GB 50007—2011, Code for Design of Building Foundation［S］.
［8］JGJ 79—2012,建筑地基处理技术规范［S］.
JGJ 79—2012, Technical Code for Ground Treatment of building ［S］.
［9］TB 10106—2010,铁路工程地基处理技术规程［S］.
TB 10106—2010, Technical Code for Ground Treatment of Railway Engineering［S］.
［10］TB 10621-2009, 高速铁路设计规范（试行）［S］.
TB 10621—2009, Code for Design of High Speed Railway［S］.
［11］铁建设［2005］140号，新建时速200~250公里客运专线铁路设计暂行规定（上、下）［S］.
Railway Construction［2005］No.140. Interim Design Provisions for a new 200 km/h~250 km/h Passenger Dedicated Railway［S］.
［12］铁建设函［2005］285号，新建时速200公里客货共线铁路设计暂行规定［S］.
Railway Construction Letter［2005］No.285，Interim Design Provisions for a new 200 km/h Mixed Passenger and Freight Railway［S］.
［13］TB 10001—2005, 铁路路基设计规范［S］.
TB 10001—2005, Code for Design on Subgrade of Railway［S］.
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