有限土体基坑围护结构侧移及地表沉降规律试验研究

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中图分类号：TU473；[U25] 文献标志码：A

本文引用格式：，等.有限土体基坑围护结构侧移及地表沉降规律试验研究[J].华东交通大学学报，2025，42（6）：82-90.

Experimental Study on Lateral Displacement and Surface Settlement Law of Foundation Pit Retaining Structures with Limited Soil

Fang Tao， Zhu Xiaojie， Fang Wenyuan， Ouyang Peiqi， Xia Liangli （SchoolofCivilEngineeringandArchitecture，EastChinaJiaotongUniversity，Nanchang33o13，China）

Abstract： To explore the variation laws of horizontal displacement offoundation pit retaining piles and surface settlement outside the pit under finite soil conditions，anexcavation modeltest was carried out ona foundation pit with semi-infinite soil mass onone side and finite soilon the other three sides.The variation laws of internal force，deformation of retaining piles and surface settement outside the pit under the condition of limited soil mass were obtainedand the relationship between the horizontal displacement of retaining piles and surface setlement was further analyzed.The results show that the horizontal displacement ofretaining piles is positively correlated with the soil width B ，and the reduction of soil width can effectively reduce the horizontal displacement at the top and along the body of retaining piles; the maximum surface setlement increases first and then decreases with the increase of soil width B .Under the condition of limited soil width， the soil width has a significant influence on the surface settement outside the foundation pit，and there is a critical value ofsoil width B ; the maximum bending moment of the retaining pile body is positively correlated with the soil width B ，and the soil width has a smallinfluence on the position of the maximum bending moment.The research can provide theoretical basis and basis for the design and construction of limited soil foundation pit in the future.

Key words： limited soil foundation pit; model test; horizontal displacement; surface settlement

Citation format：FANG T， ZHUXJ，FANG WY，et al.Experimental study on lateraldisplacement and surface settement lawoffoundation pit retaining structures with limited soil[J].Journal ofEastChina Jiaotong University， 2025，42（6）： 82-90.

近年来，由于城市地下建设空间的大规模发展，导致拟建基坑工程与相邻建、构筑物及已有基坑的间距逐渐减小，从而产生了一些特殊的基坑工程，如基坑群工程、临近地下空间基坑工程等，其围护结构均存在有限土体条件。（剩余10635字）