Long-Term Settlement of Subway Tunnel and Prediction of Settlement Trough in Coastal City Shanghai

Ground fissure is a kind of serious geological disaster. There will be more unprecedented challenges during the construction of the urban subway in ground fissures-developed zone. How to ensure the long-term operation safety of the subway crossing ground fissure belts are the first problems for the subway under construction in the cities with ground fissure developed. One of the important problems is that dynamic interaction and disaster effect control among ground fissure-stratum-subway tunnel under subway dynamic loading, which is also the important problem to be solved in the engineering. This problem involves the following three aspects: (a) the determination of subway dynamic loading; (b) the structure dynamic response of subway tunnel; (c) the interaction among stratum-ground fissure-subway tunnel. According to make a comment on these researches, some issues which are necessary to carry out in this field are suggested.

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Cherchell: An Algerian Mediterranean Historical City with a Rich Islamic Heritage Housing

Journal of Islamic Architecture ◽

10.18860/jia.v3i3.2745 ◽

2015 ◽

Vol 3 (3) ◽

pp. 127

Author(s):

Abdelkader BEHIRI ◽

Naima Chabbi-Chemrouk

Keyword(s):

Geographical Area ◽

Specific Situation ◽

Islamic Period ◽

Residential Architecture ◽

Architectural Elements ◽

Coastal City ◽

Heritage Buildings ◽

Different Cultures ◽

The City

<p class="Keywords">Islamic residential architecture has some common architectural and architectonic elements issued from shared values such as privacy, simplicity and sobriety. Applied to residential architecture, these values led to some characteristic spaces and architectural elements such as patios or arcs. However, the Islamic civilisation is composed by different cultures spread on a great geographical area; this variety induced different interpretations of these elements by using different building shapes or materials. In this paper, we will present an example of this interpretation in the historical coastal city of Cherchell in northern Algeria. The city of Cherchell is a historic coastal city that witnessed the passage of several civilizations before the arrival of the Islamic one since its founding more than 2500 years ago. This specific situation as historical coastal city allowed the exchange with different civilizations around the Mediterranean Sea, giving rise in the Islamic period to a typical earth architecture characterised by a specific arch’s typology. The objective of this article is to present an interpretation of Islamic heritage housing architecture in a Mediterranean historical coastal city (through two specific elements: building material and architectonic element). The long term aim of this study is the dissemination of traditional technics and know-how in order restore cultural heritage buildings and construct new projects with a strong Islamic identity.</p>

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Effects of Urban Configuration on Human Thermal Conditions in a Typical Tropical African Coastal City

Advances in Meteorology ◽

10.1155/2013/549096 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 8

Author(s):

Emmanuel Lubango Ndetto ◽

Andreas Matzarakis

Keyword(s):

Thermal Comfort ◽

Climate Model ◽

Meteorological Data ◽

Urban Climate ◽

Thermal Conditions ◽

Urban Street ◽

Coastal City ◽

Human Thermal Conditions ◽

Comfort Parameters

A long-term simulation of urban climate was done using the easily available long-term meteorological data from a nearby synoptic station in a tropical coastal city of Dar es Salaam, Tanzania. The study aimed at determining the effects of buildings’ height and street orientations on human thermal conditions at pedestrian level. The urban configuration was represented by a typical urban street and a small urban park near the seaside. The simulations were conducted in the microscale applied climate model of RayMan, and results were interpreted in terms of the thermal comfort parameters of mean radiant (Tmrt) and physiologically equivalent (PET) temperatures. PET values, high as 34°C, are observed to prevail during the afternoons especially in the east-west oriented streets, and buildings’ height of 5 m has less effect on the thermal comfort. The optimal reduction ofTmrtand PET values for pedestrians was observed on the nearly north-south reoriented streets and with increased buildings’ height especially close to 100 m. Likewise, buildings close to the park enhance comfort conditions in the park through additional shadow. The study provides design implications and management of open spaces like urban parks in cities for the sake of improving thermal comfort conditions for pedestrians.

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Supplementary material to "Measurement report: Long-term real-time characterisation of the submicronic aerosol and its atmospheric dynamic in a Mediterranean coastal city: Tracking the polluted events at the Marseille-Longchamp supersite"

10.5194/acp-2020-1015-supplement ◽

2020 ◽

Author(s):

Benjamin Chazeau ◽

Brice Temime-Roussel ◽

Grégory Gille ◽

Boualem Mesbah ◽

Barbara D'Anna ◽

...

Keyword(s):

Real Time ◽

Coastal City ◽

Atmospheric Dynamic ◽

Supplementary Material

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Analysis and Prediction of Long-term Settlement of Metro Shield Tunnel in Saturated Sand

10.21203/rs.3.rs-315813/v1 ◽

2021 ◽

Author(s):

Jianzheng Liu ◽

Yang Yixin ◽

Yang Chunjie

Keyword(s):

Prediction Model ◽

Sandy Soil ◽

Shield Tunnel ◽

Sand Layer ◽

Saturated Sand ◽

Subway Tunnel ◽

Curve Model ◽

Engineering Projects ◽

Soil Area

Abstract based on the existing monitoring data, this paper uses the matured data method to analyze and predict the long-term settlement of the subway shield tunnel, and comprehensively analyzes the long-term settlement of the subway shield tunnel in the saturated sand layer of Zhengzhou. Logical curve model is used. Etc. separately predict the long-term settlement of the Zhengzhou metro shield tunnel, and combine the prediction results to summarize the characteristics of the prediction model to obtain a prediction model suitable for the long-term settlement of the subway shield tunnel in the sandy soil area represented by Zhengzhou, which can be used for the operation of the Zhengzhou subway tunnel. Management and similar engineering projects provide a certain reference basis.

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