盾构施工中非整环注浆对地表位移影响的研究  

INFLUENCE OF NON-INTEGRAL GROUTING ON SURFACE DISPLACEMENT IN SHIELD CONSTRUCTION

作　　者：魏纲 陈涵 叶馨 齐永洁 WEI Gang;CHEN Han;YE Xin;QI Yongjie(Department of Civil Engineering,Zhejiang University City College,Hangzhou 310015,China;Key Laboratory of Safe Construc-tion and Intelligent Maintenance for Urban Shield Tunnels of Zhejiang Province,Hangzhou 310015,China;Hangzhou Jiaotou Second Navigation Institute Design Consulting Co.,Ltd.,Hangzhou 310012,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙大城市学院土木工程系,杭州310015 [2]浙江省城市盾构隧道安全建造与智能养护重点实验室,杭州310015 [3]杭州交投二航院设计咨询有限公司,杭州310012 [4]浙江大学建筑工程学院,杭州310058

出　　处：《低温建筑技术》2022年第8期101-105,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金资助项目(52178399)。

摘　　要：盾构施工中注浆是非常重要的一环,但实际工程中可能会出现由于注浆量不足而引起的非整环注浆,造成较大的土体扰动。文中分析了盾构隧道施工中非整环注浆对地表位移的影响,用体积膨胀来模拟注浆效果,基于随机介质理论推导了非整环注浆膨胀引起的土体位移计算公式;分析了不同隧道埋深、膨胀区半径对地表位移的影响。研究结果表明,文中方法计算得到的横向地表变形曲线大致呈对称分布,非整环注浆计算所得的纵向地表变形在不考虑土体损失情况下大致以注浆位置为中心对称;隧道埋深越浅,地表沉降最大值增大越明显;膨胀区半径取较小时,即注浆量较小时,注浆造成的隆起会减小,但因为未完全有效填充间隙,沉降最大值会逐渐增大。Grouting is a very important part in shield construction. In practical engineering, non-integral domain grouting may occur due to insufficient grouting amount, resulting in large soil disturbance. The influence of non-integral domain grouting on surface deformation in shield tunnel construction is analysed. The grouting effect is simulated by volume expansion process. The calculation formula of soil displacement caused by non-integral grouting expansion is deduced based on random medium theory. The effects of different tunnel depth and expansion zone radius on surface displacement are analyzed. The results show that the transverse surface deformation curves calculated by this method are roughly symmetrical. The longitudinal surface deformation calculated by non-integral grouting is roughly symmetrical cantered on the grouting position without considering the soil loss. The shallower the tunnel is buried, the more obvious the increase of the maximum surface settlement is. If the radius of expansion zone is small,that is, grouting quantity is small, the uplift caused by grouting will be reduced, but the maximum settlement will gradually increase because the gap is not fully and effectively filled.

关 键 词：盾构隧道 非整环注浆 注浆长度 地表位移 

分 类 号：TU745.3[建筑科学—建筑技术科学]