چکیده مقاله
Tunnel excavation in soft grounds may lead to surrounding soil displacements Prediction of these movements is necessary for estimating potential risks to preexisting structures Considering soil complex behavior, especially granular soils which are commonly encountered in Tabriz city, empirical methods are of particular position In this paper we present a setup of physical modeling, which allows to directly observe the soil displacements By this experimental setup, the settelemt has been measured during tunnel coustruction in sandy soil at civil engineering laboratory of Sahand university of technology Volume loss at tunnel depth has been used to model tunneling effect on surrounding soil The front wall of the model is transparent and soil layers movements have been recorded by digital camera The movment of the sand has been measured by image processing technic The taken frames have been extracted and processed by means of GeoPIV code Then, the calculated surface and sub surface settlement curves have been compared with peck curve Obtained results show that surface and subsurface settlement curves in dry sand sample follow Gaussian curve with acceptable accuracy but putting figure in its parameters must be done carefully During excavation in drained condition such as sand, ground loss at depth may not be the same as that at the surface, therefore the use of tunnel volume loss may lead to inaccurate prediction of surface settlement
کلیدواژهها
نویسندگان
a Abdoli Fazel
Master candidate, Department of Civil Engineering, Sahand University of Technology, Tabriz
m Emami Tabrizi
Assistant Professor, Department of Civil Engineering, Sahand University of Technology, Tabriz
h Afshin
Assistant Professor, Department of Civil Engineering, Sahand University of Technology, Tabriz
f Salehi Aali
Manager, Tabriz Urban Railway Organization,TURO, Tabriz
شیوه ارجاع
Abdoli Fazel, a and Emami Tabrizi, m and Afshin, h and Salehi Aali, f,1394,Observation of Ground Subsidence Caused by Shield Tunnel Construction in Sand,The Second Regional Conference and the Eleventh Iran Tunnel Conference,Tehran
ارائهشده در
مجموعه مقالات دومین کنفرانس منطقه ای و یازدهمین کنفرانس تونل ایران11 آبان 1394 · تهران