Analysis of Existing Tunnels Deformation Induced by New Othogonal Tunneling Using Park Convergence Model
[1]JIN Junwei,FU Boyi,CHEN Yunbin,et al.Analysis of Existing Tunnels Deformation Induced by New Othogonal Tunneling Using Park Convergence Model[J].Journal of Zhengzhou University (Engineering Science),2022,43(01):76-82.[doi:10.13705/j.issn.1671-6833.2022.01.012]
Copy
Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43
Number of periods:
2022 01
Page number:
76-82
Column:
Public date:
2022-01-09
- Title:
- Analysis of Existing Tunnels Deformation Induced by New Othogonal Tunneling Using Park Convergence Model
- Keywords:
- tunnel excavation; displacement controlled method; numerical analysis; convergence model; existing tunnels
- CLC:
- TU454
- DOI:
- 10.13705/j.issn.1671-6833.2022.01.012
- Abstract:
- Due to the complexity of the traditional force controlled method in analyzing the deformation process of the ground and the existing tunnels caused by the orthogonal under-crossing of the tunnel, the displacement controlled method was adopted in this article to analyze the influence of tunnel excavation on the ground settlement and the longitudinal deformation of the arch bottom of the existing tunnels based on Park’s convergence model that described more realistic tunnel boundary deformation. Firstly, through the comparison of the mea-suring data with the calculation results of the method in this paper and the force controlled method, the feasibility of the displacement control method under newly built tunnels under-crossing existing tunnel was verified, and then the four tunnel convergence modes of Park were used as the boundary conditions on the new tunnel for further analysis. The comparison between the calculated results and the actual measurements showed that the results of the displacement control method for natural site settlement were very close to the measured data. The calculation results showed that, given the displacement of the tunnel vault g, there were certain differences in the shape and value of the ground settlement trough and the deformation of tunnel arch bottom caused by Park’s four convergence models. With the same soil loss and g value, the effects of convergence mode on surface settlement and the deformation of tunnel arch bottom were circular non-uniform convergence, elliptical convergence, elliptic non-uniform convergence, and uniform convergence in descending order. Among them, the effect of elliptical convergence and non-uniform convergence of ellipse was relatively close, while the uniform convergence and the actual measurements had the worst fitting effect. Surface settlement caused by tunnel construction and the deformation mode of existing tunnel was different, the surface settlement appeared as a Gaussian curve while the tunnel deformation may appear as a “W” shape when the distance between the tunnels was constant.
- References:
-
［1］ 张洪锋．浅埋盾构隧道近接桩基础渗流应力耦合安 全性分析［J］．公路工程，2019，44( 4) : 250－257．
［2］ 郜新军，段鹏辉，王磊．基坑开挖对邻近管线变形影 响及控制措施研究［J］．郑州大学学报( 工学版) ， 2020，41( 5) : 66－71．［3］ 杨友彬，裴利华，林东．综合管廊近接地铁线施工对 既有隧道的影响研究［J］．地下空间与工程学报， 2019，15( 增刊 1) : 188－194．［4］ 李从安，李波，王志鹏，等．新建隧洞下穿既有隧道 离心模型试验研究［J］．中国水利水电科学研究院 学报，2017，15( 4) : 286－290．［5］ LIANG Ｒ Z．Simplified analytical method for evaluating the effects of overcrossing tunnelling on existing shield tunnels using the nonlinear Pasternak foundation model ［J］．Soils and foundations，2019，59( 6) : 1711－1727．［6］ NG C W W，FONG K Y，LIU H L． The effects of existing horseshoe-shaped tunnel sizes on circular crossing tunnel interactions: three-dimensional numerical analyses［J］． Tunnelling and underground space technology，2018，77: 68－79．［7］ KAVVADAS M，LITSAS D，VAZAIOS I，et al．Development of a 3D finite element model for shield EPB tunnelling［J］．Tunnelling and underground space technology，2017，65: 22－34．［8］ PENG F L，WANG H L，TAN Y，et al．Field measurements and finite-element method simulation of a tunnel shaft constructed by pneumatic caisson method in Shanghai soft ground［J］． Journal of geotechnical and geoenvironmental engineering，2011，137( 5) : 516－524．［9］ LECA E． Modelling and prediction for bored tunnels ［C ］/ /International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground． London: ISSMGE，1996: 27－41．［10］ ＲAO D G． Modelling the variation of soil stiffness during sequential construction［D］． Cambridge: University of Cambridge，1996．［11］ STALLEBＲASS S E，GＲANT Ｒ J，TAYLOＲ Ｒ N． A finite element study of ground movements measured in centrifuge model tests of tunnels［C］/ /International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground． London: ISSMGE，1996: 595－600．［12］ CHENG C Y，DASAＲI G Ｒ，CHOW Y K，et al．Finite element analysis of tunnel-soil-pile interaction using displacement controlled model［J］．Tunnelling and underground space technology，2007，22( 4) : 450－466．［13］ 杜佐龙，黄茂松，李早．基于地层损失比的隧道开挖 对临近群桩影响的 DCM 方法［J］．岩土力学，2009， 30( 10) : 3043－3047．［14］ PAＲK K H． Elastic solution for tunneling-induced ground movements in clays［J］．International journal of geomechanics，2004，4( 4) : 310－318．［15］ 魏纲．盾构施工中土体损失引起的地面沉降预测 ［J］．岩土力学，2007，28( 11) : 2375－2379．［16］ 魏纲．盾构隧道施工引起的土体损失率取值及分布 研究［J］．岩土工程学报，2010，32( 9) : 1354－1361．［17］ LOGANATHAN N，POULOS H G．Analytical prediction for tunneling-induced ground movements in clays［J］． Journal of geotechnical and geoenvironmental engineering，1998，124( 9) : 846－856．
［18］ LEE K M，ＲOWE Ｒ K，LO K Y． Subsidence owing to tunnelling． I． Estimating the gap parameter ［J］． Canadian geotechnical journal，1992，29( 6) : 929－940．［19］ YIN M L，JIANG H，JIANG Y S，et al． Effect of the excavation clearance of an under-crossing shield tunnel on existing shield tunnels［J］． Tunnelling and underground space technology，2018，78: 245－258
- Similar References:
Memo
-
Last Update:
2022-01-09