CAJ | 학술논문

针对管幕预筑法中深埋顶管顶力进行理论和实测分析.顶管顶力与垂直土压力密切相关.参照隧道开挖中垂直土压力的计算方法,常用的垂直土压力计算理论有:普氏理论和太沙基理论.在详细分析了这两种垂直土压力计算理论的适用性和缺陷之后,结合普氏理论和太沙基理论,提出了改进的垂直土压力计算理论公式,并编写MATLAB程序计算改进理论公式的数值解.改进理论既考虑了土拱效应,又考虑了拱下土体的挟持力,更符合实际土体变形情况.将普氏理论、太沙基理论和改进的理论应用于沈阳地铁新乐遗址站管幕预筑法顶管工程中,计算不同深度的两根大埋深管道顶力,并把计算与实测结果进行比较,发现普氏理论和太沙基理论计算结果都远大于实测值,改进理论计算结果稍大于实测值,更适合于深埋顶管顶力估算.
침대관막예축법중심매정관정력진행이론화실측분석.정관정력여수직토압력밀절상관.삼조수도개알중수직토압력적계산방법,상용적수직토압력계산이론유:보씨이론화태사기이론.재상세분석료저량충수직토압력계산이론적괄용성화결함지후,결합보씨이론화태사기이론,제출료개진적수직토압력계산이론공식,병편사MATLAB정서계산개진이론공식적수치해.개진이론기고필료토공효응,우고필료공하토체적협지력,경부합실제토체변형정황.장보씨이론、태사기이론화개진적이론응용우침양지철신악유지참관막예축법정관공정중,계산불동심도적량근대매심관도정력,병파계산여실측결과진행비교,발현보씨이론화태사기이론계산결과도원대우실측치,개진이론계산결과초대우실측치,경괄합우심매정관정력고산.
Theoretical and experimental analyses are conducted for the pipe jacking force of the great depth pipeline in pipe roof pre-construction method. The pipe jacking force is closely related to the vertical soil pressure. Reference to the calculation method of vertical earth pressure in tunnel excavation, there are two kinds of frequently-used theories to calculate vertical earth pressure in pipe jacking, i.e. M. M. Promojiyfakonov theory and Terzaghi theory. After analyzing the adaptability and defects of the two kinds of theories, new modified theoretical formula based on M. M. Promojiyfakonov theory and Terzaghi theory is got to calculate vertical earth pressure;and MATLAB program is written to calculate the numerical solution of new modified theoretical formula. Both the soil arching effect and the holding force under the arching of soil are considered in modified theory, which is more consistent with the actual soil deformation. M. M. Promojiyfakonov theory, Terzaghi theory and modified theory are used to calculate jacking force of two pipelines at different depths in pipe roof pre-construction method of Xinle Ruins Station of Shenyang Metro; the calculated results are compared to the measured results. It is shown that the results of M. M. Promojiyfakonov theory and Terzaghi theory are much larger than the measured values;the results of modified theory are slightly larger than the measured results. So that the results of modified theory are more suitable for estimating pipe jacking force of great depth pipelines.