On the Investigation of Protection Technique for the Old City Wall of Ming Dynasty-Xian 4th Tube Line Construction

2013 ◽  
Vol 353-356 ◽  
pp. 2913-2918
Author(s):  
Jing Zhu Li ◽  
Jian Xu
Keyword(s):  
Ming Dynasty ◽  
Surface Deformation ◽  
Soil Surface ◽  
Deformation Model ◽  
Railway Transportation ◽  
City Wall ◽  
Protection Scheme ◽  
Line Construction ◽  
Pass Through ◽  
The City

In this paper Xian 4th tube line is selected as the research target, the earth surface deformation is evaluated based on the soil surface deformation model, and the influence of construction of Xian 4th tube line on the city wall of Ming dynasty is investigated, the protection scheme and rules are proposed when the tube pass through the city wall, the influence on the wall is evaluated during the tube operation and the protection technique is also proposed, which will reduce the influence from the construction and operation of tube, and the friendly development between the railway transportation and environment is realized.

Research on the Rehabilitation of the Ancient City Wall of the Wuchang Uprising Gate

2012 ◽  
Vol 166-169 ◽  
pp. 1526-1529
Author(s):  
Zhu Sun
Keyword(s):  
Ming Dynasty ◽  
Tang Dynasty ◽  
Large Scale ◽  
100Th Anniversary ◽  
The South ◽  
City Wall ◽  
Ancient City ◽  
City Walls ◽  
The Government ◽  
The City

To commemorate the 100th anniversary of the Xinghai Revolution, the government of Wuchang district in Wuhan City intends to rehabilitate rain-wind corridor, feudal pavilion and the city walls. After access to historical data, site survey, mapping, photographing and measuring, the rehabilitating engineering program of rain-wind corridor, feudal pavilion and the city walls of the Wuchang Uprising Gate is achieved. In the fourth year of Hongwu (1371), Ming dynasty, Zhou Dexing, the duke of Jiangxia, built Wuchang city on the basis of Yingzhou city of Tang dynasty. Wuchang city has large scale. In Ming and Qing dynasty, it was the legacy of county, town, city and province. Its diameter from the east to the west was of 2.5 km, with 3 km from the north to south. The thickness of wall foundation is 22.44 m, with top thickness 17.82 m. Nine gates were designed for the ancient city. The Uprising gate, one of the nine gate of the Wuchang ancient city, was opened to the south and also the busiest gate for entering the city. New Army Engineering Battalion of Hubei took the lead and fired the first shot. And then they occupied Zhonghe Gate and Chu Wangtai to welcome the South Lake artillery, Ma team and other revolutionaries.

scholarly journals Mapping the Pollution Plume Using the Self-Potential Geophysical Method: Case of Oum Azza Landfill, Rabat, Morocco

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 961
Author(s):  
Meryem Touzani ◽  
Ismail Mohsine ◽  
Jamila Ouardi ◽  
Ilias Kacimi ◽  
Moad Morarech ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Water Table ◽  
Soil Surface ◽  
The Self ◽  
Drainage Network ◽  
Geophysical Method ◽  
Direct Measurements ◽  
Sandy Material ◽  
The City ◽  
Self Potential

The main landfill in the city of Rabat (Morocco) is based on sandy material containing the shallow Mio-Pliocene aquifer. The presence of a pollution plume is likely, but its extent is not known. Measurements of spontaneous potential (SP) from the soil surface were cross-referenced with direct measurements of the water table and leachates (pH, redox potential, electrical conductivity) according to the available accesses, as well as with an analysis of the landscape and the water table flows. With a few precautions during data acquisition on this resistive terrain, the results made it possible to separate the electrokinetic (~30%) and electrochemical (~70%) components responsible for the range of potentials observed (70 mV). The plume is detected in the hydrogeological downstream of the discharge, but is captured by the natural drainage network and does not extend further under the hills.

scholarly journals Constructing Adaptive Deformation Models for Estimating DEM Error in SBAS-InSAR Based on Hypothesis Testing

2021 ◽  
Vol 13 (10) ◽  
pp. 2006
Author(s):  
Jun Hu ◽  
Qiaoqiao Ge ◽  
Jihong Liu ◽  
Wenyan Yang ◽  
Zhigui Du ◽  
...  
Keyword(s):  
Time Series ◽  
Hypothesis Testing ◽  
Surface Deformation ◽  
A Priori ◽  
Least Square ◽  
Deformation Model ◽  
Phase Time ◽  
Testing Theory ◽  
Sbas Insar ◽  
Deformation Models

The Interferometric Synthetic Aperture Radar (InSAR) technique has been widely used to obtain the ground surface deformation of geohazards (e.g., mining subsidence and landslides). As one of the inherent errors in the interferometric phase, the digital elevation model (DEM) error is usually estimated with the help of an a priori deformation model. However, it is difficult to determine an a priori deformation model that can fit the deformation time series well, leading to possible bias in the estimation of DEM error and the deformation time series. In this paper, we propose a method that can construct an adaptive deformation model, based on a set of predefined functions and the hypothesis testing theory in the framework of the small baseline subset InSAR (SBAS-InSAR) method. Since it is difficult to fit the deformation time series over a long time span by using only one function, the phase time series is first divided into several groups with overlapping regions. In each group, the hypothesis testing theory is employed to adaptively select the optimal deformation model from the predefined functions. The parameters of adaptive deformation models and the DEM error can be modeled with the phase time series and solved by a least square method. Simulations and real data experiments in the Pingchuan mining area, Gaunsu Province, China, demonstrate that, compared to the state-of-the-art deformation modeling strategy (e.g., the linear deformation model and the function group deformation model), the proposed method can significantly improve the accuracy of DEM error estimation and can benefit the estimation of deformation time series.

WALLS, GATES AND STORIES: DETECTING ROME'S RIVERSIDE DEFENCES

2021 ◽  
pp. 1-32
Author(s):  
T.P. Wiseman
Keyword(s):  
Careful Attention ◽  
City Wall ◽  
The Subject ◽  
The City

The construction date of the ‘Servian’ wall and its layout in the riverside area between the Aventine and the Capitol are the two main questions addressed in this article. The interlocking topographical problems were addressed in 1988 by Filippo Coarelli, whose interpretation has become the generally accepted orthodoxy. But not all the difficulties have been solved, and with Coarelli's recent return to the subject a fresh examination of the evidence may be helpful. Careful attention is given here to stories of early Rome that involve the walls and gates, as reported in Livy, Dionysius and Plutarch; they are not, of course, taken as authentic evidence for the time of the alleged events, but as indicating what was taken for granted when the stories were first composed. New suggestions are made about a revision of the line of the city wall in 212 BC and the consequent restructuring of two important gates, the Porta Carmentalis and the Porta Trigemina; the mysterious ‘Porta Triumphalis’ is discussed separately in an appendix.

X.—Recent Discoveries in connexion with Roman London

Archaeologia ◽  
1906 ◽  
Vol 60 (1) ◽  
pp. 169-250 ◽  
Author(s):  
Philip Norman ◽  
Francis W. Reader
Keyword(s):  
Post Office ◽  
City Wall ◽  
Deep Trench ◽  
The Road ◽  
The City

Early in January, 1905, the street called London Wall was opened by the Post Office authorities for the purpose of laying telephone mains. Operations were begun at Moorgate Street and were carried in an easterly direction, a deep trench being dug in the middle of the roadway. The excavations had extended past Salisbury House as far as Circus Place, when it was noticed that among the débris thrown at the side of the road were quantities of ragstone and Roman tile, showing clearly that the city wall was being cut into.

scholarly journals Progressive Degradation of an Ice Rumple in the Thwaites Ice Shelf, Antarctica, as Observed from High-Resolution Digital Elevation Models

2018 ◽  
Vol 10 (8) ◽  
pp. 1236 ◽  
Author(s):  
Seung Hee Kim ◽  
Duk-jin Kim ◽  
Hyun-Cheol Kim
Keyword(s):  
High Resolution ◽  
Surface Deformation ◽  
Surface Expression ◽  
Deformation Model ◽  
Ice Shelf ◽  
Pressure Source ◽  
Viscoelastic Deformation ◽  
Shelf Stability ◽  
Transient Nature ◽  
Elevation Changes

Ice rumples are locally-grounded features of flowing ice shelves, elevated tens of meters above the surrounding surface. These features may significantly impact the dynamics of ice-shelf grounding lines, which are strongly related to shelf stability. In this study, we used TanDEM-X data to construct high-resolution DEMs of the Thwaites ice shelf in West Antarctica from 2011 to 2013. We also generated surface deformation maps which allowed us to detect and monitor the elevation changes of an ice rumple that appeared sometime between the observations of a grounding line of the Thwaites glacier using Double-Differential Interferometric SAR (DDInSAR) in 1996 and 2011. The observed degradation of the ice rumple during 2011–2013 may be related to a loss of contact with the underlying bathymetry caused by the thinning of the ice shelf. We subsequently used a viscoelastic deformation model with a finite spherical pressure source to reproduce the surface expression of the ice rumple. Global optimization allowed us to fit the model to the observed deformation map, producing reasonable estimates of the ice thickness at the center of the pressure source. Our conclusion is that combining the use of multiple high-resolution DEMs and the simple viscoelastic deformation model is feasible for observing and understanding the transient nature of small ice rumples, with implications for monitoring ice shelf stability.

scholarly journals Rejuvenation of City Gateway as the Identity of Medan

2020 ◽  
Vol 4 (2) ◽  
pp. 210-216
Author(s):  
Dwi Lindarto Hadinugroho ◽  
Eunice Ananda Putri Matondang
Keyword(s):  
Significant Role ◽  
Descriptive Study ◽  
City Image ◽  
City Area ◽  
City Gates ◽  
Qualitative Descriptive ◽  
Pass Through ◽  
The City

As a developing city, Medan carries out a significant role in establishing the identity and image of the city and the development of the surrounding cities and districts. One effort to establish the identity and image of the city can be created through the existence of city gates that can produce a plot, rhythm, and balance for the city bounded. The gate of Medan City has not succeeded in becoming a city gate that meets the needs needed by migrants who pass through the city gate area. This study will address the problems discovered at the Medan City gate in Binjai, Tanjung Morawa, Tembung, and Pancur Batu and relate them to the rejuvenation of the city area through revitalization methods in supporting Metropolitan Mebidangro. The research aims to analyze predetermined variables, namely elements of the city image, namely path, edge, district, nodes, and landmark. For this reason, a qualitative descriptive study was carried out, which was realized through observation and interviews and also documentation studies. The results of the research obtained from this study can be used as a reference and solution to find out the problems that exist int the area around Medan City gate and also give functional supports to develop the area around Medan City.

Preservation Strategies of Longdong Ancient City Walls in Systematic Perspective

2016 ◽  
Vol 41 (3) ◽  
pp. 50-55
Author(s):  
Xiaohui Yu ◽  
Fei Wang ◽  
Lina Wang
Keyword(s):  
Point System ◽  
Specific Situation ◽  
Systematic Method ◽  
System Planning ◽  
City Wall ◽  
Ancient City ◽  
Historic Landmark ◽  
City Walls ◽  
The City ◽  
Great Portion

City wall is an important symbol of ancient Chinese cities with unique geographical and cultural characteristics. Thus, the preservation of this historic landmark is considered significantly important. However, numerous residential construction activities and changes in ecological environment have destructed a great portion of the city walls in recent years. This study looks into the preservation of the ancient city walls from the systematic perspective and in line with the actual characteristics of Longdong Region to provide guideline measures for the protection and restoration of such landmark. Cognition and preservation are adopted extensively to investigate the specific situation of and the factors that influence the ancient city walls in this region. Preservation strategies for the city walls, including the “Axis-Point” system, planning control, and authenticity readability, are presented. The ancient city walls in Longdong Region can be preserved by protecting the entire region, the city, and the main wall body. The systematic method and preservation strategies at the “macro perspective,” “medium perspective” and “micro perspective” levels can solve the preservation problems of the ancient city walls in Longdong Region effectively.

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