单圆和异形盾构隧道施工引起土体位移计算的类随机介质理论方法  

Analogous stochastic medium theory method(ASMTM) for predicting soil displacement induced by general and special-section shield tunnel construction

作　　者：曾彬 黄达[3] 彭念 陈福勇 ZENGBin;HUANGDa;PENG Nian;CHEN Fuyong(School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of CivilEngineering,Chongqing University,Chongqing 400045,China;School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin300401,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]重庆大学土木工程学院,重庆400045 [3]河北工业大学土木与交通学院,天津300401

出　　处：《岩石力学与工程学报》2018年第A02期4356-4366,共11页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金面上项目(41672300);重庆教委资助项目(KJ1500534);重庆科委资助项目(cstc2015jcyjA30017)~~

摘　　要：随着城市建设的不断发展,地下可利用空间越来越少,以异形盾构为代表的新的隧道施工技术得到了迅速发展,研究与之相适应的土体位移预测方法是亟待解决的重要课题。将随机介质理论方法的思想引入到Loganathan公式,提出适用于任意断面形式隧道施工引起土体位移预测的类随机介质理论方法,并推导土体位移计算的一般公式。以单圆隧道和双圆盾构隧道为例,给出相应土体位移预测的计算表达式,通过多个实例计算分析,并与实测值及传统方法预测值对比,对所提方法进行验证及应用。结果表明:类随机介质理论方法对于单圆隧道施工引起土体位移的预测效果优于Loganathan公式和随机介质理论方法;对双圆盾构隧道施工引起土体位移的预测结果与实测值吻合较好,最大土体位移出现在左右隧道顶部。本文提出的类随机介质理论方法可用于任意断面形式隧道施工引起土体位移预测,适用范围广,计算结果可靠,为异形盾构隧道施工诱发土体位移预测提供了重要的理论依据。The continuous development of urban construction leads to less and less available underground space and promotes the rapid development of the novel tunneling technologies,such as special-section shield tunneling. It has become an important issue to study the corresponding method of predicting soil displacement induced by tunneling. The analogous stochastic medium theory method(ASMTM) has been presented through introducing the idea of the stochastic medium theory method(SMTM) to Loganathan's solution,and the general formula of ASMTM has been derived. Taking the single circular tunneling and the double-O-tube(DOT) shield tunneling as examples,their expressions to predict soil displacement induced by tunneling have been given first,the ASMTM then has been verified and applied in some cases,comparing with the SMTM,Loganathan's solution and the observed values. The results show that the single circular tunneling-induced soil displacements predicted by the ASMTM are closer to the observed values than those resulted from the SMTM and Loganathan’s solution. For the DOT shield tunneling,the predicted soil displacements from the ASMTM are in good agreement with the observed values,and the soils above the left and right tunnels have the maximum displacement. The presented ASMTM can be used to prediction soil displacement induced by arbitrary shaped-section tunneling and has an extent area to use,with a sufficient reliability. This study provides an important theoretical basis for prediction soil displacements induced by special-section tunnel construction.

关 键 词：隧道工程 类随机介质理论法 双圆盾构 土体位移 土体损失 

分 类 号：U45[建筑科学—桥梁与隧道工程]