地铁车站小直径管幕工法开挖变形规律

doi:10.12068/j.issn.1005-3026.2022.11.015

东北大学学报（自然科学版） ›› 2022, Vol. 43 ›› Issue (11): 1630-1637.DOI: 10.12068/j.issn.1005-3026.2022.11.015

地铁车站小直径管幕工法开挖变形规律

王子君¹，赵文¹，程诚²，柏谦¹

(1. 东北大学资源与土木工程学院，辽宁沈阳110819； 2. 中国矿业大学力学与土木工程学院，江苏徐州221116)

发布日期:2022-12-06
通讯作者: 王子君
作者简介:王子君(1996-)，男，河北张家口人，东北大学硕士研究生；赵文(1962-)，男，内蒙古乌兰察布人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51878127).

Deformation Law of Subway Station Constructed by Small Diameter Tube Curtain Method

WANG Zi-jun¹， ZHAO Wen¹， CHENG Cheng²， BAI Qian¹

1. Schoo of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China； 2. School of Mechanics & Civil Engineering， China University of Mining and Technology， Xuzhou 221116， China.

Published:2022-12-06
Contact: ZHAO Wen
About author:-
Supported by:
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摘要/Abstract

摘要： 沈阳地铁市府大路站是采用小直径管幕工法施工的地铁暗挖车站.通过有限差分软件FLAC^3D建立车站结构-地层三维模型，分析总结了小直径管幕工法动态开挖过程引起的地层及主体结构的位移变形规律.结果表明:小直径管幕工法开挖过程引起的地表沉降具有明显的阶段性，沉降槽形态在群洞效应和管幕预支护作用的影响下变化频繁，横导洞间土体开挖阶段引起的地表沉降占到了最终沉降的50.54%，该阶段是地表沉降控制的关键阶段；管幕-梁-桩-柱施工完成后，主体结构变形表现出良好的协同作用，横梁竖向变形表现为车站两端小中间大，边桩及中柱的水平位移在负二层施工期间增长显著，占到了水平位移最大值的47.1%和55.8%，该阶段是控制主体结构变形的关键阶段.

关键词: 小直径管幕工法；地铁车站；数值分析；地表沉降；结构变形

Abstract: Shifudalu station of Shenyang Metro is constructed by small diameter tube curtain construction method. The three-dimensional model of station structure and stratum was built by using FLAC^3D. The deformation laws of stratum and the main structure caused by dynamic excavation of small diameter tube curtain were analyzed and summarized. The results show that the surface settlement caused by small diameter tube curtain excavation takes on staged characteristics. Under the influence of group hole effect and pre-support of the pipe curtain， the shape of the settlement tank changes frequently. The ground surface settlement caused by soil excavation between transverse guide tunnels accounts for 50.54% of the final settlement， which is the key stage of ground surface settlement control. After the completion of tube curtain-beam-pile-column construction， the deformation of the main structure shows a good synergistic effect. The vertical deformation of the beam is small at both ends of the station and large in the middle. The horizontal displacement of the side pile and the middle column increased significantly during the negative second storey construction period， and accounts for 47.1% and 55.8% of the maximum horizontal displacement respectively. This stage is the key stage in controlling the deformation of the main structure.

Key words: small diameter tube curtain method; subway station; numerical analysis; surface settlement; structure deformation

中图分类号:

TU94

王子君，赵文，程诚，柏谦. 地铁车站小直径管幕工法开挖变形规律[J]. 东北大学学报（自然科学版）, 2022, 43(11): 1630-1637.

WANG Zi-jun， ZHAO Wen， CHENG Cheng， BAI Qian. Deformation Law of Subway Station Constructed by Small Diameter Tube Curtain Method[J]. Journal of Northeastern University(Natural Science), 2022, 43(11): 1630-1637.

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地铁车站小直径管幕工法开挖变形规律

Deformation Law of Subway Station Constructed by Small Diameter Tube Curtain Method

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