浅埋矩形顶管整体背土效应理论计算与分析
Theoretical Calculation and Analysis of Overall-carrying-soil Effect of Shallow Buried Rectangular Pipe Jacking
万海峰 1沈青松1
作者信息
- 1. 中国电建华东勘测设计研究院有限公司,浙江杭州 311100
- 折叠
摘要
矩形顶管相较于圆形顶管有更高的空间利用率,已被广泛应用于各种地下空间的施工建设中.但是,浅埋矩形顶管与其正上方土体之间的摩阻力会随着顶程的增加而增加,从而诱发整体背土效应.因此,在原有模型的基础上,考虑了浅埋矩形顶管正上方土体与相邻土体之间的相互作用,建立了新的整体背土效应模型.该模型与工程结果的相对误差为9.31％,相较于原有模型提高了6.76％.新模型定性分析表明,矩形顶管宽度越大、埋深越小、管土摩擦系数越大,越容易发生整体背土效应,破坏时对应的顶程就会相对更小.
Abstract
Compared with circular jacking pipes,rectangular ones have higher space utilization so that are widely used in the construction of various underground spaces.But,the friction between the shallow buried rectangular jacking pipe and the above soil will increase as the jacking distance increases and induce the overall-carrying-soil effect.Based on the existing model,the interaction between the above soil and adjacent soils is considered and a new overall-carrying-soil effect model is established.The relative error between the new model and the engineering results is 9.31％,which is 6.76％higher than the existing model.The new model analysis shows that the larger the width of the rectangular jacking pipe,the smaller the burial depth,and the larger the pipe-soil friction coefficient,overall-carrying-soil effect is more likely to occur,and the jacking distance is relatively smaller during the failure.
关键词
矩形顶管/浅埋顶管/整体背土效应/理论模型Key words
rectangular pipe jacking/shallow buried pipe jacking/overall-carrying-soil effect/theoretical model引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据