桩基托梁扶壁式托盘支挡结构设计-《高速铁路技术》

文章信息/Info

Author(s):: ZHAO Qinghai; XUE Haiyang; HU Huixing; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: high-speed railway|pile foundation joist buttress tray|subgrade retaining wall|design method

摘要:: 随着我国高速铁路的飞速发展，线路不可避免地以路基穿越城镇及生态环境敏感区，常规的支挡结构难以适应局促的施工场地及满足环保要求，亟需一种新型结构来解决面临的难题。本文创新性地提出了一种桩基托梁扶壁式托盘支挡结构，并详细介绍了其结构设计方法。桩基托梁扶壁式托盘支挡结构主体由扶壁式托盘挡土墙、托梁和桩基三部分组成，上部扶壁式托盘挡土墙可有效对路基进行收坡，中部托梁可将上部荷载传递至下部桩基，再由下部桩基将荷载传递至持力层。该结构在国内外高速铁路、公路领域尚属首次提出，具有结构新颖、安全可靠、施工简单等特点。可有效节约工程用地，减少工程投资，降低对生态环境的影响。

Abstract:: With the rapid development of high-speed railway in China, when the route inevitably passes through the towns and the environmental environment sensitive areas by the subgrade, for the conventional retaining structure, it is difficult to adapt to the limited construction site and meet the environmental protection requirements, so a new structure is urgently needed to solve the above problems. In this paper, an innovative pile foundation joist buttress tray retaining structure is proposed and its structural design method is introduced in detail. The main body of pile foundation joist buttress tray retaining structure consists of buttress tray retaining wall, joist and pile foundation. The upper buttress tray retaining wall can effectively reduce the slope of the subgrade, and the middle joist can transfer the upper load to the lower pile foundation and the lower pile foundation can transfer the load to the bearing layer. This structure is first proposed in the field of high-speed railway and highway at home and abroad. It is characterized by novel structure, safety and reliability, and simple construction. It can effectively save project land, reduce project investment and reduce the impact on the ecological environment.