ground settlement is often the most serious concern when tunneling under an old city with numerous historic monuments. a successful engineering design under these conditions would require getting the most out of the ground strength parameters and avoiding any weakening maneuver throughout the operation. knowing that surface settlement is highly affected by tunneling parameters in epb shield tun...

INTRODUCTION Beijing subway line 14 includes four stations and approximately 2.8 km of tunnels between the Dongfengbeiqiao and Jingshunlu areas of the city. Due to the surface and underground space limitations of this section, a double-track running tunnel instead of two single-track running tunnels was adopted to connect the two stations. The double-track tunnels were excavated by a 10.22 m di...

Abstract The subway tunnels built in some coastal cities often cross the soft and hard alternating strata, which makes shield construction more difficult. single mode cannot meet needs of efficient environmental protection, while dual (TBM-EPB) can better adapt to complex geological conditions alternating, effectively improve tunneling efficiency machine, ensure safety timeliness project constr...

Abstract During the tunneling process of shield machine, accurate determination parameters is guarantee safe operation machine. Through real-time construction data analysis and mining at next moment are obtained in real-time. Based on this, this paper proposes an intelligent prediction method for multi-region thrust EPB machine based Sparrow Search algorithm-Long Short-term Memory (SSA-LSTM). B...

For the two types of shield tunneling such as Slurry and EPB shield the stability of tunnel face depends on the prevailing support pressure. The support pressure at the tunnel face has to be applied to a value that gives as well sufficient safety against a collapse of the tunnel face as the against uplifting. The paper aims at a better understanding of the mechanics of face failure for those la...

With the aim of probing for design theory of cutterhead excavation system of earth pressure balance (EPB) machine, the parameters representing the system performance are concluded firstly. Then a 3D model for cutterhead excavation system of EPB machine is presented with the discrete element method (DEM) software PFC, which is capable of simulating the tunneling ground in site, the machine struc...

Our expert system aims at the optimum and fast plan making for shield-tunneling works. It is an expert system of applied design problems that integrates such advanced technologies as relational databases , AI, and computer-aided design (CAD). This expert system is able to design and draw a suitable shield machine with an automatic output of design calculations and also specify an optimum contro...

Due to urbanization and population increase, need for metro tunnels, has been considerably increased in urban areas. Estimating the surface settlement caused by tunnel excavation is an important task especially where the tunnels are excavated in urban areas or beneath important structures. Many models have been established for this purpose by extracting the relationship between the settlement a...

Ground settlement is often the most serious concern when tunneling under an old city with numerous historic monuments. A successful engineering design under these conditions would require getting the most out of the ground strength parameters and avoiding any weakening maneuver throughout the operation. Knowing that surface settlement is highly affected by tunneling parameters in EPB shield tun...

Predicting the maximum ground subsidence (Smax) in construction of soil pressure balanced shield tunnel, particularly on soft foundation soils, is essential for safe operation and to minimize possible risk damage urban areas. Although some research has been done, this issue not solved because its complexity many other influencing factors. Due increasing accuracy machine learning(ML) predicting ...