Results 21 to 30 of about 207,008 (281)

Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

open access: yesGeofluids, 2022
Taking China’s first application of domestic shield tunneling in a water-rich sand layer for crossing a high-speed railway as research background, the influence of changes in the shield tunneling parameters on ground settlement is analyzed based on field
Yuan Mei   +5 more
doaj   +2 more sources

Peck Formula Modification of and Engineering Application in Small Radius Curve Shield Tunneling Construction

open access: yesChengshi guidao jiaotong yanjiu
Objective In the urban rail transit line planning, curved tunnels, and even small radius curved tunnels are often chosen due to influencing factors such as building foundations, underground pipelines, and weak soil layers.
Linghang YANG
doaj   +2 more sources

Muck Improvement Technology for Connection Passage of Shield Tunneling Metro Tunnels in Coastal Areas

open access: yesChengshi guidao jiaotong yanjiu
[Objective] In the process of the earth pressure balance shield machine advancing in the coastal area cohesive soil layer, phenomena such as mud cake formation, unsmooth muck discharge, and blockage of the soil chamber often occur.
JIANG Peng   +5 more
doaj   +2 more sources

Experimental Study on the Soil Conditioning Materials for EPB Shield Tunneling in Silty Sand

open access: yesAdvances in Civil Engineering, 2020
Earth pressure balance (EPB) shield tunneling in a silty sand stratum is frequently faced with the wear of rotary cutter disc, clogging, or even collapse of workface due to its noncohesive and discrete properties of silty sand material. Soil conditioning
Chi-Hao Cheng   +3 more
doaj   +2 more sources

Determination of 3D Analytical Parameters for Ground Deformation Induced by Stratum Loss during Shield Tunneling

open access: yesChengshi guidao jiaotong yanjiu
[Objective] Shield tunneling inevitably induce stratum loss, subsequently causing ground deformation. Existing analytical solutions use undetermined parameters as inputs, but the complexity of parameter determination limits the application of analytical ...
LI Xinlong   +4 more
doaj   +2 more sources

Machine Learning-Based Automatic Control of Shield Tunneling Attitude in Karst Strata

open access: yesBuildings
Accurate prediction and optimized control of shield tunneling attitude are critical for ensuring tunneling quality and construction safety. In karst and other highly heterogeneous strata, complex geological conditions and construction parameters exhibit ...
Liang Li   +4 more
doaj   +2 more sources

Structural monitoring of metro infrastructure during shield tunneling construction. [PDF]

open access: yesScientificWorldJournal, 2014
Shield tunneling construction of metro infrastructure will continuously disturb the soils. The ground surface will be subjected to uplift or subsidence due to the deep excavation and the extrusion and consolidation of the soils.
Ran L, Ye XW, Ming G, Dong XB.
europepmc   +2 more sources

Effects of neglecting carrier tunneling on electrostatic potential in calculating direct tunneling gate current in deep submicron MOSFETs [PDF]

open access: yes, 2002
We investigate the validity of the assumption of neglecting carrier tunneling effects on self-consistent electrostatic potential in calculating direct tunneling gate current in deep submicron MOSFETs. Comparison between simulated and experimental results
Haque, A, Hakim, MMA
core   +1 more source

Analysis of Shield Tunnel Ground Deformation Characteristics and Affecting Factors in Water-Rich Soft Stratum: A Case Study on the Section Tunnel of Tianjin Metro Line 6

open access: yesApplied Sciences, 2022
With the increasing intensity of underground development, the planned metro lines will inevitably pass through water-rich soft stratum. The existing research results show that shield tunneling in water-rich stratum is prone to ground settlement and ...
Xinyu Li, Dingli Zhang, Yanjuan Hou
doaj   +1 more source

Disturbance analysis of shield tunneling in clay and limestone composite strata using EDEM simulation. [PDF]

open access: yesSci Rep
With the mass implementation of rail transit engineering, the tunnel constructed by the shield method will inevitably pass through increasingly complex strata. Compared with single formation, studying the disturbance rule of shield tunneling in composite
Song S   +5 more
europepmc   +2 more sources

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