马蹄形盾构施工引起的土体竖向位移计算研究  

DERIVING VERTICAL DISPLACEMENT OF GROUND DUE TO HORSESHOE-SHAPED SHIELD CONSTRUCTION

作　　者：何骏飞 魏纲[1] 张鑫海 HE Junfei;WEI Gang;ZHANG Xinhai(Department of Civil Engineering,Zhejiang University City College,Hangzhou 310015,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)

机构地区：[1]浙江大学城市学院土木工程系,杭州310015 [2]浙江大学建筑工程学院,杭州310058

出　　处：《低温建筑技术》2019年第12期92-96,共5页Low Temperature Architecture Technology

基　　金：浙江省科技厅公益技术研究项目(2016C33051)

摘　　要：针对马蹄形盾构施工引起的土体变形,基于Mindlin位移解和随机介质理论,考虑不同因素对土体竖向位移的影响,提出了马蹄形盾构施工引起的土体竖向位移计算方式。研究结果表明,造成开挖面前方隆起的主要原因为马蹄形盾构施工的盾壳摩擦力;在取不同正面附加推力时,对隆起影响不同,表现为正面附加推力越大,隆起越明显;在土体损失率不同的工况下,土体损失引起的沉降量与土体损失率呈正相关。In view of the soil deformation caused by the construction of horseshoe shield, a calculation method for the soil vertical displacement caused by the construction of horseshoe shield was proposed based on Mindlin displacement solution and random medium theory and considering the influence of different factors on the soil vertical displacement. The results show that the main cause of the uplift in front of the excavation is the friction of the shield during the construction of horseshoe shield. When different frontal additional thrust is taken, the influence on the uplift is different. The reaction is that the higher the frontal additional thrust is, the more obvious the uplift is.Under working conditions with different soil loss rate, the settlement caused by soil loss is positively correlated with soil loss rate.

关 键 词：马蹄形盾构 多因素 土体变形 随机介质理论 MINDLIN解 

分 类 号：TU441.6[建筑科学—岩土工程]