深厚软土且空间受限条件下桩板结构现浇梁支架方案设计  

Design of Cast-in-situ Beam Support Scheme for Pile Slab Structure under Conditions of Deep Soft Soil and Limited Space

作　　者：栗帅武 LI Shuai-wu(China Railway 17th Bureau Group(Guangzhou)Construction Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]中铁十七局集团(广州)建设有限公司,广州510663

出　　处：《价值工程》2025年第1期82-85,共4页Value Engineering

摘　　要：桩板结构具有结构简单、受力明确等优点,能够减少材料用量,降低工程造价,在跨越小面积的河流、道路或其他交通设施时,得到广泛使用。莲鹤大道项目与珠肇高铁并行段,设计采用桩板结构桥梁,共计3100m,地质条件复杂,淤泥质软土深厚,梁底距离地面空间受限,现浇梁施工难度大。设计方建议采用贝雷梁+工字钢结构形式支架方案,由于部分梁底距离地面净空不足,该方案向下反开挖最多达3.0m,施工工效低,投入大。本文针对不同净空条件,研究了三种支架结构,满足共线段3.1km桩板结构现浇梁施工,提高了施工工效,降低了施工成本,为后续类似工程提供了参考。The pile plate structure has the advantages of simple structure and clear stress distribution,which can reduce material consumption and engineering costs.It is widely used when crossing small areas of rivers,roads,or other transportation facilities.The Lianhe Avenue project and the parallel section of the Zhuzhao high speed railway are designed to use a pile slab structure bridge,with a total length of 3100m.The geological conditions are complex with deep and muddy soft soil,and the distance between the bottom of the beam and the ground is limited.The construction of cast-in-place beams is difficult.The design team suggests using a bracket scheme consisting of Bailey beams and I-beams.Due to insufficient clearance between the bottom of some beams and the ground,this scheme can excavate up to 3.0m downwards,resulting in low construction efficiency and high investment.This article studies three types of support structures for different clearance conditions,which meet the requirements of cast-in-place beam construction for a 3.1km pile slab structure on a common section,improve construction efficiency,reduce construction costs,and provide reference for similar projects in the future.

关 键 词：桩板结构 深厚软土 空间受限 支架现浇 

分 类 号：TU755[建筑科学—建筑技术科学]