Underground Passage: The Mole in Its Burrow

All Ears ◽  
2020 ◽  
pp. 51-58
Keyword(s):  
Underground Passage

The Influence of Underpass on Surface Subsidence Caused by Double-Tube Shield Tunneling

2014 ◽  
Vol 915-916 ◽  
pp. 108-113
Author(s):  
Wei Kai Zong
Keyword(s):  
Simulation Method ◽  
Surface Subsidence ◽  
Channel Width ◽  
Ground Movement ◽  
Shield Tunnel ◽  
Underground Structures ◽  
Shield Tunneling ◽  
Underground Channel ◽  
Underground Passage ◽  
The Impact

Shield construction will cause surface subsidence, and the presence of underground structures above the tunnel has an impact on surface subsidence. Based on this, with the engineering of undercross shield tunnel construction on railway station as background, used numerical simulation method to analyze the effect of surface subsidence of underground passage, and studied the influence of depth and width of underpasses on ground movement induced. The results show that: The impact of the underground passage to the wire surface subsidence caused by the shield cannot be ignored. Surface subsidence caused by double shield will be decreased because of the existence of the underground passage, and that related to the channel depth and width. The greater the depth of underground channel, the greater the surface subsidence; greater the underground channel width, the smaller surface subsidence. Meanwhile, the surface subsidence trough width and the largest settlement scope unrelated to the depth of underground tunnels but the underground channel width, and increases with the increasing of the underpass width.

Sheffield: Old Underground Passage

1920 ◽  
Vol s12-VII (140) ◽  
pp. 488-488
Author(s):  
Frederick L. Tavaré
Keyword(s):  
Underground Passage

Reasonable Overburden Depth Analysis of Close-Frame Structure in Airport Project

2014 ◽  
Vol 501-504 ◽  
pp. 1140-1143
Author(s):  
Qi Jie Teng ◽  
Song Hua Wu ◽  
Liang Zhang
Keyword(s):  
Structural Design ◽  
Soil Depth ◽  
Load Capacity ◽  
Longitudinal Section ◽  
Structure Type ◽  
Frame Structure ◽  
Heavy Load ◽  
Depth Analysis ◽  
Engineering Significance ◽  
Underground Passage

The close-frame is the main structure type of underground passage in airport project. Its characteristics are long route, multi-zone crossing, heavy load capacity. The suitable thickness of covering soil is advantageous to structure. Therefore, it has important engineering significance in guiding structural design and to determine the optimal route longitudinal section with reasonable economic overburden depth. Double-span close frame bearing Class E aircraft load is discussed in detail about reasonable soil depth.

The Monitoring and Numerical Simulation Analysis on the Construction of a Shallow Underpass

2014 ◽  
Vol 580-583 ◽  
pp. 1056-1060
Author(s):  
Li Sheng Liu ◽  
Jie Zhao
Keyword(s):  
Simulation Analysis ◽  
Dynamic Monitoring ◽  
Ground Settlement ◽  
Control Effect ◽  
Influence Curves ◽  
Geological Conditions ◽  
Vertical Ground ◽  
The Stability ◽  
Underground Passage ◽  
Strain Model

Based on the dynamic monitoring project of one underpass in Dalian, this paper tries to validate the control effect of the ground settlement on the stability of tunnel surrounding rocks during construction of underground passage under urban arterial road by means of analyzing the vertical ground settlement curves, convergence curves of tunnel inner perimeter and vault displacement curves. With the numerical calculation tool of the software FLAC, it also analyzes the construction of XS-2 # cross-section which was in the south side of the whole construction section at different stages by adopting the plane-strain model. Therefore, we can get the influence curves of ground settlement under different construction stages with considering the release of stress. The simulation results are basically consistent with the measured data, which has a great significance for the subsequent design and construction of underground projects with similar geological conditions.

Governance Practices of Dust in Feeder of Coal Handling System on Mine's Ground

2012 ◽  
Vol 524-527 ◽  
pp. 906-909
Author(s):  
Shao Cheng Ge ◽  
Tong Yang ◽  
De Ji Jing
Keyword(s):  
Inner Mongolia ◽  
Coal Dust ◽  
Climatic Conditions ◽  
Dust Pollution ◽  
Mining Company ◽  
Site Specific ◽  
Handling System ◽  
Effective Governance ◽  
Governance Practices ◽  
Underground Passage

It concerns about issues of dust pollution of three feeder which in the underground passage under the storage warehouse of Inner Mongolia Datang International Xilinhaotes Mining Company Limited.By inspections and investigations in the field,according to site-specific circumstances and local climatic conditions,we had implemented comprehensive renovation project of coal dust of feeder in underground passage,and achieved remarkable and effective governance results.

Characteristics and evaluation of natural attenuation processes for organic micropollutant removal during riverbank filtration

2007 ◽  
Vol 7 (3) ◽  
pp. 1-7 ◽  
Author(s):  
C.K. Schmidt ◽  
F.T. Lange ◽  
H.-J. Brauch
Keyword(s):  
Urban Areas ◽  
Wide Spectrum ◽  
Riverbank Filtration ◽  
Organic Micropollutants ◽  
Micropollutant Removal ◽  
Trace Compounds ◽  
High Level ◽  
Underground Passage ◽  
Organic Trace Compounds

In industrialized and urban areas, surface waters are to a high level exposed to anthropogenic environmental impacts and are therefore often contaminated with a wide spectrum of organic trace compounds. Riverbank filtration is a well established technique in Europe and is most often used as an important component of the multiple-barrier system. During its underground passage, surface water undergoes a diversity of physical, biological and chemical processes, improving water quality significantly and adjusting it in ideal cases to the quality of natural groundwater. By means of examples taken from recent research projects and related to organic micropollutants currently under discussion, this contribution will report on characteristics of riverbank filtration with regard to its purification capacity for different classes of organic micropollutants.

scholarly journals COMPARATIVE POWER CALCULATION OF THE LONGITUDINAL BEAM OF THE HEAD CAR BARROW IN THE SUBWAY ACTION IN THE MIDDLE OF THE BEAM OF UNIFORMALLY DISTRIBUTED LOAD

2021 ◽  
Vol 1 (161) ◽  
pp. 169-175
Author(s):  
O. Kuznetzov ◽  
O. Chuprinin ◽  
T. Suprun ◽  
D. Babaev
Keyword(s):  
Plastic Hinge ◽  
External Loading ◽  
Power Calculation ◽  
Electric Transport ◽  
Resource Saving ◽  
Bearing Strength ◽  
Loading Case ◽  
Deformed State ◽  
Simultaneous Loss ◽  
Underground Passage

Priority directions and events among basic industries of municipal electric transport is resource saving in a transport system of underground passage during his exploitation. First of all this problem must be decided by scientific accompaniment, id est on the stage of planning of details and knots of transport vehicles. One of the basic tasks decided on the stage of planning is an increase of bearing strength of details due to the analysis of their tensely-deformed state. The article is sanctified to the calculation of supply of carrying capacity of stringer of front carriage of subway at operating under the middle of the equipartition loading case-insensitive transversal forces. Priority of research theme is reasonable, an aim and tasks are set forth. Two going offer near the power calculation of bearing strength of stringer: calculation on the assumed tensions and on the maximum states. The resilient models of beams are examined in both cases. In case of calculation on the maximum state mechanics of origin of plastic hinges is first of all grounded in the places of the hard fixing of ends of beam. A beam saves the bearing strength still. At the further height of the external loading appearance of plastic hinge is justified even in the middle of beam with a simultaneous loss by the beam of bearing strength. For the design of behavior of beam in accordance with her descriptions, including on tensions and by the condition of loss of her bearing strength. The mathematical raising of task of calculation of bearing strength of stringer at the calculation of possible tensions and maximum state is examined case-insensitive transversal force. Bearing strength of stringer is analysed at a calculation on possible tensions and on the maximum state. The analysis of the got results allows to judge about efficiency of an offer mathematical model on the whole. Got equalizations for the maximally possible loading at a calculation on the maximum states and on possible tensions allows reliably to estimate bearing strength of stringer in both cases. The increase of bearing strength of beam at a calculation on the maximum state is thrice-repeated. Drawn conclusion about adequacy of analysis of bearing strength of stringer.

scholarly journals Air Pollution by Particulate Matter (Pm10) in Craiova Municipality

2013 ◽  
Vol 70 (2) ◽  
pp. 439-440
Author(s):  
Elena GAVRILESCU ◽  
Gilda-Diana BUZATU ◽  
Simona Mariana POPESCU
Keyword(s):  
Particulate Matter ◽  
Particulate Matters ◽  
Urban Background ◽  
Limit Values ◽  
Gas Network ◽  
Maximum Value ◽  
Particulate Matter Emissions ◽  
Public Water Systems ◽  
Underground Passage ◽  
The City

In the present study we have monitored particulate matters in different locations in the city of Craiova and Preajba area. We have considered necessary to establish this theme due to the intense traffic, the rehabilitation and modification of public water systems, sewage system and gas network from the over ground and underground passage, and the two CETs from Craiova municipality, which are sources of particulate matter emissions. The measurements carried out reveal a significant content of particulate matters in the Electro Bridge and Km 0 Craiova (urban background), CET I (industrial) and insignificant in the Preajba area. There were recorded daily average and maximum values, as well as hourly values, which were compared with the limit values set by Order 592/2002, there were observed exceedances up to 200%  from the maximum value allowable.

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