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输电线路挖孔基础格栅钢架护壁设计研究

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利用原状土性能、经济环保的挖孔基础是输电线路铁塔基础的主要型式之一,为保障基坑作业安全,一般采用现浇护壁防护措施.现浇护壁的支模、浇筑、养护等工序时间占基础基坑开挖工期的30%~50%,基础工期受现浇护壁影响大,同时现浇护壁养护周期、拆模时间不易控制,施工质量不易保证,基坑作业风险大.为缩短工期、提高施工安全性、减小基坑作业风险,提出工厂加工、现场组装的格栅钢架护壁.格栅钢架护壁作为一种新型护壁,与传统混凝土护壁相比具有缩短工程工期、确保工程质量和节能减排的优点.通过对挖孔基础格栅钢架护壁进行分析,提出了新的见解,对工程设计具有指导意义.
Research on the Design of Grid Steel Frame Wall Protection for Excavation Foundation of Transmission Lines
One of the main types of transmission line tower foundations is to use undisturbed soil properties,economic and environmentally friendly excavation foundation.In order to ensure the safety of foundation pit operations,cast-in-place wall protection measures are generally adopted.The supporting,pouring,and maintenance processes of the cast-in-place protective wall account for 30% to 50% of the excavation period of the foundation pit.The foundation period is greatly af-fected by the cast-in-place protective wall.At the same time,the maintenance period and demolding time of the cast-in-place protective wall are difficult to control,and the construction quality is not easy to ensure,resulting in high risks in foundation pit operations.In order to shorten the construction period,improve construction safety,and reduce the risk of foundation pit operations,a grid steel frame protective wall that is processed in the factory and assembled on site is pro-posed.As a new type of protective wall,the grid steel frame protective wall has the advantages of shortening the construc-tion period,ensuring project quality,and energy conservation and emission reduction compared to traditional concrete pro-tective walls.This article analyzes the steel frame protective wall of the excavation foundation grid and proposes new in-sights,which have guiding significance for engineering design.

transmission lineexcavation foundationgrid steel frame protective wall

葛元飞、丁秉昊

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中国电建集团河南省电力勘测设计院有限公司,河南 郑州 450007

输电线路 挖孔基础 格栅钢架护壁

2024

电工技术
重庆西南信息有限公司(原科技部西南信息中心)

电工技术

影响因子:0.177
ISSN:1002-1388
年,卷(期):2024.(z1)