Numerical analysis of subsidence induced by construction of a NATM tunnel

Abstract

The design of urban tunnels, often constructed at shallow depths, in soft ground, requires an appropriate prediction of ground surface settlements. Control of surface settlements is of particular importance in open-face tunneling. This paper presents a finite element analysis of subsidence above conventionally constructed Steinhaldenfeld tunnel in Stuttgart, Germany. The surface settlement profiles obtained by calculations were compared with the empirical Gaussian curve and the profile obtained by measurements.

Projektovanje tunela koji se nalaze u urbanom području, i često na maloj dubini, u mekom tlu, zahteva adekvatno predviđanje sleganja površine terena. Kontrola sleganja je od naročitog značaja kod izgradnje tunela sa otvorenim čelom. U radu je prikazana analiza primenom metode konačnih elemenata sleganja iznad konvencionalno građenog tunela Steinhaldenfeld u Štutgartu, Nemačka. Izvršeno je poređenje profila sleganja površine terena dobijenih proračunima sa empirijskom Gausovom krivom i profilom koji je dobijen merenjima.