6928

6470

كارشناسي ارشد

مكانيك سنگ

اصفهان: دانشگاه صنعتي اصفهان، دانشكده معدن

1390

[هشت]، 100ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

راحب باقرپور، لهراسب فرامرزي

سعيد مهدوري، اسماعيل فصيحي

11/5/91

عباس اسلامي حقيقت، مسعود چراغي

1396/09/18

كتابنامه

معدن

مهندسي معدن

ID6470

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

101 The Effect of Excavation of the Line 7 Tehran Metro Tunnel on the Lining of Sewage Crossing Tunnel Torab Alemzadeh torab alem@gmail com Date of Submission 2012 02 18 Department of Mining Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language FarsiSupervisor Raheb Bagherpour bagherpour@cc iut ac irSupervisor Lohrasb Faramarzi lfaramarzi@cc iut ac irAbstractNowadays in response to the development of big cities the expansion of transportation system is very vital Due to the shortage of free ground space in urban areas underground transportation system is ineviteble The construction of new tunnels such as metro tunnels could probably pass near the existing tunnels or nextto the crossing of other tunnels Ground movement usually occurs during tunneling project that could causeground surface settlement or undesirable effects on ground and underground structures around tunnel Theeast west part of line 7 in Tehran metro begins from Amir al momenin township and continues until thecross section of Qazvin Street and Navab Highway The length of this part is about 12 km and is excavatedby EPB shield which has 9 164 meter diameter One of the challenges in metro tunnel excavation at theeast west route its cross passing beneath the east sewage tunnel of Tehran The sewage tunnel with ovalcross section has 3 3 meter height 2 6 meter width and 11 meter overburden According to the importanceof sewage tunnel service in the city the stability of tunnel is significant and the deformation of tunnel liningmust be as low as possible To achieve this purpose the EPB shield operational parameters such as facepressure advance rate and grouting pressure must be modied according to the ground condition and theposition of other sensitive structures around different tunnels such as sewage tunnels The aim of thisresearch is the investigation of sewage tunnel lining behavior induced by new metro tunnel construction For this reason the operational parameters of EPB such as face pressure and grouting pressure effects areinvestigated by using a full 3D finite difference analysis coupled with elasto plastic material models At thefirst stage the face pressure which is appropriate for field operation is achieved using analytical methodsand is used in numerical analysis the results that the existing support of sewage tunnel in the cross sectionarea is affected first at the leading side left then at the invert after that at the crown or at the far side right as the metro tunnel face advances but relatively in the sections which are far from the crossingremains almost unchanged during the construction of the new tunnel At the cross section of sewage tunnelnext to metro tunnel the impact on the leading side of sewage tunnel is larger than the sections that are farfrom the metro tunnel face Generally the large effects are occurred at the invert of sewage tunnel Furthermore the results have also demonstrated that the face pressure has little influences on the right sideof tunnel and it is due to right side dependence of the sewage tunnel support The influence of groutingpressure at the invert and right side of tunnel is much more than the left side and crown In high groutingpressure heaving at the invert of tunnel is possible Also ground improvement at the cross section of thetwo tunnels have significant effects on the control of ground movement therefore a significant decreaseoccurs in the magnitude of bending moment and thrust force of sewage support system Keywords Line 7 of Teharan metro Sewage Tunnel Tunnel cross section operational parameters EBP shield improvement of ground FLAC 3D

راحب باقرپور، لهراسب فرامرزي

سعيد مهدوري، اسماعيل فصيحي

عباس اسلامي حقيقت، مسعود چراغي