摘要
装配式施工具有绿色、高效等优点,逐步应用于各类地下工程建造中。路基U型槽作为地上与地下结构的连接段,断面坡度较大、型式不统一,采用装配式施工难度大。为了解决U型槽施工重难点问题,推动U型槽装配式建造新模式,研究依托国内铁路首例装配式U型槽工程——京唐铁路大断面U型槽装配工程,开展了大断面路基U型槽装配式建造关键技术研究。研究提出了基坑永临结合、U型槽结构轻量化设计方法,保障了结构的整体性与安全性;针对U型槽结构断面型式不统一、大坡度拼装等问题,研发了调节通用模板、翻转台车、张拉小车等预制及拼装设备,提出了系统的装配式U型槽施工工法及全过程质量智能管控方法,并创新了施工管理模式。本研究开创了U型槽装配式施工新模式,有助于建筑工业化在路基U型槽中的推广。
Prefabricated construction,with its environmentally friendly and highly efficient characteristics,is progressively being implemented across various underground engineering projects.As a connecting segment between the above ground and underground structures,the roadbed U⁃shaped groove presents significant challenges due to its steep cross⁃sectional slope and non⁃standardized configurations,thereby complicating the adoption of prefabrication techniques.To tackle these construction difficulties and propel a novel prefabrication approach for U⁃shaped grooves,research has been concentrated on China′s first railway project utilizing prefabricated U⁃shaped grooves⁃the large cross⁃section U⁃shaped grooves assembly project of the Beijing⁃Tangshan Intercity Railway.This study encompasses the development of key technologies for the prefabricated construction of large cross⁃section roadbed U⁃shaped grooves.The investigation proposes combined permanent and temporary excavation methodologies and lightweight design strategies for U⁃shaped grooves structures,ensuring overall integrity and safety.In response to the inconsistencies in cross⁃sectional shapes and the complexities associated with assembling steep slopes,specialized prefabrication and assembly equipment have been developed,including adjustable universal molds,flipping gantries,and tensioning carts.Additionally,a systematic construction method for prefabricated U⁃shaped grooves and an intelligent quality control method throughout the entire process have been formulated,alongside the innovation of a new construction management model.This research pioneers a fresh paradigm for prefabricated U⁃shaped grooves construction,facilitating the broader application of industrialized building practices within the context of roadbed U⁃shaped grooves.
作者
孙立军
SUN Lijun(China Railway 14th Bureau Group Co.Ltd.,Jinan Shandong 250014,China)
出处
《铁道建筑技术》
2024年第7期172-176,共5页
Railway Construction Technology
基金
中铁十四局集团有限公司技术开发项目(CR14-GC-2023-0010)。
关键词
铁路路基
装配式施工
现场试验
大断面U型槽
永临结合
拼装设备
railway roadbed
prefabricated construction
on⁃site testing
large cross⁃section U⁃shaped groove
integration of permanent and temporary structures
assembly equipment
作者简介
孙立军(1981-),男,黑龙江望奎人,高级工程师,硕士,主要研究方向为轨道运输工程设施建设、城市基础工程设施建设,E-mail:18408672@qq.com。
