Results 111 to 120 of about 106,010 (167)

Study on plastic flow of conditioned soil within pressure chamber of deeply buried EPB shields tunneling through sandy stratum

Scientific Reports
For earth pressure balance (EPB) shield tunneling, the stability of tunnel face is controlled by the excavation and discharge rates of soil within tunnel pressure chamber. To ensure continuous discharge of soil from pressure chamber, the soil is required
Xiaochun Zhong, Siyuan Huang, Haijun Wang, Qiang Yun   +3 more
doaj   +1 more source

Optimization of defoaming-flocculation-dewatering indices of earth pressure balance (EPB) shield muck using response surface methodology and desirability approach

Journal of Rock Mechanics and Geotechnical Engineering
In situ recycling is one of the most effective methods to dispose of earth pressure balance (EPB) shield waste muck with residual foaming agents with high moisture content.
Yao Lu, Ming Huang, Chengzhao Zhang, Bingnan Wang, Liqian Peng, Wei Wei   +5 more
doaj   +1 more source

Factorial Experiments of Soil Conditioning for Earth Pressure Balance Shield Tunnelling in Water-Rich Gravel Sand and Conditioning Effects’ Prediction Based on Particle Swarm Optimization–Relevance Vector Machine Algorithm

Buildings
The high permeability of gravel sand increases the risk of water spewing from the screw conveyor during earth pressure balance (EPB) shield tunnelling.
Xingzhong Nong, Wenfeng Bai, Jiandang Chen, Lihui Zhang   +3 more
doaj   +1 more source

Modelling the infiltration behaviour of foam into saturated sand considering capillary resistance for EPB shield tunnelling

With reference to earth pressure balance (EPB) shield tunnelling, the pressure infiltration of foam into saturated sand is investigated through model study.
Bezuijen, Adam, Thewes, Markus, Zheng, Dongzhu   +2 more
core   +1 more source

A simple model incorporating foam rheology to quantify foam penetration behaviour in EPB shield tunnelling

Fulfilling the role of a soil conditioner, foam plays a pivotal role in Earth Pressure Balance (EPB) shield tunnelling by enhancing soil properties such as lowering permeability and increasing flowability.
Huang, He, Qin, Su, Bezuijen, Adam, Zhou, Wan-Huan   +3 more
core   +1 more source

Interactions at the front face of EPB shield when drilling in sand

Tunnelling and Underground Space Technology
The construction of a tunnel with a tunnel boring machine (TBM) influences the soil in front of the TBM. Excess pore pressures are measured in front of the TBM, which influence the stability of the soil. The magnitude of these pressures depends among others on the soil layering, drilling velocity, permeability of the soil and the pressure in the mixing
openaire   +1 more source

Systematic study of effect of cross-drafts and nozzle diameter on shield gas coverage [PDF]

, 2013
A shield gas flow rate of 15–20 L min21 is typically specified in metal inert gas welding, but is often adjusted to as high as 36 L min21 by welders in practice. Not only is this overuse of shield gas wasteful, but uncontrolled high gas flows can lead to
Campbell, Stuart, Moore, A.J., Galloway, Alexander, Beyer, V., Ramsey, Gemma, McPherson, Norman   +5 more
core  

Analysis of the Performance of Two Component Back-filling Grout in Tunnel Boring Machines Operating under Face Pressure [PDF]

, 2010
Schulkins, R., Dal Negro E., Borio, Luca, Schulkins R., Boscaro A., Boscaro, A., Peila, Daniele, Dal Negro, E., Pelizza, Sebastiano   +8 more
core  

Expanding the application range of EPB shields using SolidFoam

, 2023
Marius Schröe, Nils Gramlich, Markus Thewes, Lars Langmaack   +3 more
openaire   +1 more source

DEVELOPMENT OF VISUALIZATION SYSTEM FOR SOIL FLOW IN THE CHAMBER OF EPB SHIELD

Journal of Japan Society of Civil Engineers, Ser. F1 (Tunnel Engineering), 2017
Atsushi KAGAWA, Shizuka KANNO, Yasushi ABE, Motohiro HIDAKA, Yukinobu KIMURA   +4 more
openaire   +2 more sources