The other architecture: From natural caves to excavated housing

Excavated towns are an attractive example of underground urbanism that managed to solve, in a very interesting way, thermal problems thanks to natural ground inertia or transition spaces. The aim of this paper is to show the typological evolution of excavated dwellings worldwide, as an architectural proposal and urban solution. The proposed methodology provides an analysis of underground architectures from natural caves to excavated housing, focusing on the study of global constructive solutions to specific problems. Thus, architectures as a natural geography correction (horizontal excavation), buried underground architectures (vertical excavation), subtractive architectures (shallow excavation) and combined architectures (mixed excavation) are studied. In conclusion, there are many examples of typological combinations since troglodyte architects tried to adapt the most elementary constructive rules to get greatly enriched results. These proposals of different underground structures deal with each territory and its geographical features, and obtain urban and architectural solutions transferable to current configurations.

Excavated housing in Crevillente (Spain). Constructive and typologycal study

Underground architecture has sheltered man for many centuries, but the current need to emphasize the bioclimatic approach makes the study of excavated housing essential. This traditional construction is a part of the collective human living experience but also a reference in using the natural conditions of each region through simple proposals based on ground thermal inertia. The aim of this paper is to show the typological evolution of the excavated dwelling in Crevillente, in southeast Spain, compared to other worldwide architectural proposals or urban solutions. To show their adaptation to the regional geography and to comprehend both formal and material characteristics of these simple typologies, which do not need extra energy contribution for interior conditioning. This work is part of the doctoral thesis of the author.

Las viviendas subterráneas y el riesgo sísmico

Se estima que las viviendas subterráneas a lo largo del mundo albergan entre 40 y 60 millones de personas. Tras un análisis general de las tipologías de viviendas subterráneas, de su localización y de los factores que influyen en su desarrollo se ha introducido el análisis de la vulnerabilidad de este tipo de viviendas ante los riesgos naturales, cuestión que no ha sido estudiada exhaustivamente con anterioridad. Cabe destacar que la localización de las viviendas subterráneas a lo largo del mundo coincide en la mayor parte de los casos con regiones activas sísmicamente, por lo que se lleva a cabo una primera aproximación al estudio de la vulnerabilidad de las viviendas subterráneas frente al riesgo sísmico, teniendo como antecedente el terremoto de la región china de Shaanxi ocurrido en 1556, que afectó a grandes agrupaciones de viviendas subterráneas.

London, England, 1873 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Philip's new plan of London, 1873. It was published by George Philip & Son in 1873. Scale [ca. 1:18,900]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the British National Grid coordinate system (British National Grid, Airy Spheroid OSGB (1936) Datum). All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as roads, railroads and underground tramways, railway stations, drainage, selected buildings and industry locations, built-up areas, postal districts, parks, cemeteries, docks, and more. Relief is shown by hachures. Includes legend. This layer is part of a selection of digitally scanned and georeferenced historic maps from The Harvard Map Collection as part of the Imaging the Urban Environment project. Maps selected for this project represent major urban areas and cities of the world, at various time periods. These maps typically portray both natural and manmade features at a large scale. The selection represents a range of regions, originators, ground condition dates, scales, and purposes.

Admittance Control for Robotic Loading: Design and Experiments with a 1-Tonne Loader and a 14-Tonne LHD

This paper describes the design, tuning, and extensive field testing of an admittance-based Autonomous Loading Controller (ALC) for robotic excavation. Several iterations of the ALC were tuned and tested in fragmented rock piles—similar to those found in operating mines—by using both a robotic 1-tonne capacity Kubota R520S diesel-hydraulic surface loader and a 14-tonne capacity Atlas Copco ST14 underground load-haul-dump (LHD) machine. On the R520S loader, the ALC increased payload by 18 % with greater consistency, although with more energy expended and longer dig times when compared with digging at maximum actuator velocity. On the ST14 LHD, the ALC took 61 % less time to load 39 % more payload when compared to a single manual operator. The manual operator made 28 dig attempts by using three different digging strategies, and had one failed dig. The tuned ALC made 26 dig attempts at 10 and 11 MN target force levels. All 10 11 MN digs succeeded while 6 of the 16 10 MN digs failed. The results presented in this paper suggest that the admittance-based ALC is more productive and consistent than manual operators, but that care should be taken when detecting entry into the muck pile

Stress Inversion Using LiDAR Tunnel Deformation Measurements

Far-field stresses are those present in a volume of rock prior to excavations being created. Estimates of the orientation and magnitude of far-field stresses, often used in mine design, are generally obtained by single-point measurements of stress, or large-scale, regional trends. Point measurements can be a poor representation of far-field stresses as a result of excavation-induced stresses and geological structures. For these reasons, far-field stress estimates can be associated with high levels of uncertainty. The purpose of this thesis is to investigate the practical feasibility, applications, and limitations of calibrating far-field stress estimates through tunnel deformation measurements captured using LiDAR imaging. A method that estimates the orientation and magnitude of excavation-induced principal stress changes through back-analysis of deformation measurements from LiDAR imaged tunnels was developed and tested using synthetic data. If excavation-induced stress change orientations and magnitudes can be accurately estimated, they can be used in the calibration of far-field stress input to numerical models. LiDAR point clouds have been proven to have a number of underground applications, thus it is desired to explore their use in numerical model calibration. The back-analysis method is founded on the superposition of stresses and requires a two-dimensional numerical model of the deforming tunnel. Principal stress changes of known orientation and magnitude are applied to the model to create calibration curves. Estimation can then be performed by minimizing squared differences between the measured tunnel and sets of calibration curve deformations. In addition to the back-analysis estimation method, a procedure consisting of previously existing techniques to measure tunnel deformation using LiDAR imaging was documented. Under ideal conditions, the back-analysis method estimated principal stress change orientations within ±5° and magnitudes within ±2 MPa. Results were comparable for four different tunnel profile shapes. Preliminary testing using plastic deformation, a rough tunnel profile, and profile occlusions suggests that the method can work under more realistic conditions. The results from this thesis set the groundwork for the continued development of a new, inexpensive, and efficient far-field stress estimate calibration method.

Local community perception towards bats (Mammalia: Chiroptera) in Caves in South central Mindanao, Philippines: Threats and Implication for conservation

In the tropics, bats are an essential component of many native ecosystems, through providing various ecological services including pollination and insect pest control, in addition to seed dispersal. Many Philippine bat species roost in caves and underground habitats. However, many caves are disturbed by people, to exploit resources for food, recreation, and mineral and guano extraction. The misunderstanding of the importance of bats to the ecosystem is also considered a threat to many cave roosting species. Understanding the conflicts between humans and ecosystems which provide essential services is important to maintain ecosystem service provision. A total of 100 local respondents from the village of Pisan, Kabacan North Cotabato in south central Mindanao were interviewed through semi-structured interviews and focus group discussions. Respondents were asked about their views, levels of knowledge, use, interaction, and awareness towards both the caves and bats in their locality. Our survey found that most of the respondents are aware of the presence of bats from the caves in their locality. Unfortunately, a large proportion of the respondents noted that bats are hunted in caves for bush meat and trade, and most people perceived bats as pest to fruit crops such as durian. These factors are among the main factors of the execution of many bat colonies in caves of south central Mindanao. In general, cave bats are under appreciated species in caves. The unregulated tourism, hunting for bush meat and trade, and guano extraction are among the alarming threats occurring for both caves and bats in the locality and possibly to other localities in the country. Furthermore, the establishment of strong and effective model conservation education programs and the strengthening the participation of local government, academic, and community are essential steps to preserve the current state of cave bats in the area.

Characterization of residual soil used for infiltration of reclaimed water

The effects of climate change and the growing demand for water for domestic, industrial, agricultural and recreational activities have been led the use of treated wastewater (reclaimed water) for such applications. The artificial recharge of aquifers with treated wastewater can be an alternative way for restoring underground water volumes that can be used for satisfying some activities, particularly in water shortage areas or where their quality is not suitable for use. After a two-year monitoring period in the Vila Fernando WWTP (Guarda, Portugal), the characteristics of the treated effluent suggest that it could be used for infiltration for aquifer recharge. A multi-criteria analysis based on GIS was developed for site location of infiltration sites. The procedure has involved the combination of six thematic maps and environmental, technical and economic criteria, over an area of 6687.1 ha. About 6.4 ha were selected for suitable sites for infiltration and one of these sites (Quinta de Gonçalo Martins, Guarda) was selected for collecting soil samples. The characterization of the soil indicates that is favorable to the infiltration of treated wastewater for artificial recharge of aquifers.

Metodologias utilizadas no estudo do escoamento em aquíferos cársicos e o caso prático da captação do Olho de Mira (Maciço Calcário Estremenho)

Tese de mestrado em Geologia Aplicada, apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2016

Acompanhamento da construção de uma captação de água subterrânea

Tese de mestrado, Geologia Aplicada (Hidrogeologia) Universidade de Lisboa, Faculdade de Ciências, 2016

Recursos hídricos superficiais vs subterrâneos na Várzea da Nazaré : implicações na qualidade da água

Tese de doutoramento, Geologia (Hidrogeologia), Universidade de Lisboa, Faculdade de Ciências, 2016

No change in the Russian Caucasus. The Winter Olympics amid a local war. OSW Study 47/2014

The North Caucasus has been the most unstable region of the Russian Federation since the collapse of the Soviet Union. Considering the scale of violence, the conflict in the region should be regarded as a local civil war between the Salafi Islamic armed underground and the secular authorities of the North Caucasus republics, supported by the security services. The Chechen leader Ramzan Kadyrov, who has made himself de facto independent from Moscow, holds a particularly strong position in the region and his ambition is to gain control of the neighbouring territories. The Russian leadership, which sees the security of the Winter Olympics in Sochi as its top priority, is facing a strategic choice between trying to integrate the North Caucasus with the rest of the federation, or isolating the region and accepting the existence of an informal "internal abroad” within Russia. The cultural processes taking place in the region, including Islamisation, de-modernisation and de-Russification, have been driving the North Caucasus ever further away from the rest of Russia, strengthening a mutual sense of foreignness.

"Creeping" civil war in the North Caucasus. OSW Commentary No. 50, 2011-03-15

Over the last year, the situation in Russia’s North Caucasus has become further destabilised. Attacks and armed clashes happen daily, and destabilisation is spreading to an increasingly large area. The extent of violence in the region is so great that it can already be stated that a de facto civil war is taking place, the warring parties being the Islamic armed underground movement which operates under the banner of the so-called Emirate of the North Caucasus, and the secular governments of the individual republics, who are supported by local and federal branches of the Russian Federation’s Interior Ministry and Federal Security Service. Moscow has no idea how to successfully tackle the Caucasus rebellion. Force has proved to be costly and unproductive, while the attempts made since early 2010 to integrate the region with the rest of Russia by implementing development programmes have not brought the desired results, because of widespread corruption and faint interest from businessmen who are afraid to invest in such an unsafe region. A growing problem for Moscow, particularly for the prestige of the state, is attacks by militants on areas near Sochi, where the 2014 Winter Olympics is to take place. It must be assumed that over the next 3 years before the Olympics, Moscow’s priority in the region will be to ensure the safety of Olympic preparations, and then the games themselves. It cannot be ruled out that the North Caucasus Federal District with its ‘troubled republics’ will be surrounded by a kind of cordon sanitaire (Sochi is situated in the neighbouring Southern Federal District). This could in turn strengthen these republics’ isolation, maintain the state of permanent instability, and postpone the prospects of solving the region’s acute economic and social problems.

The 'tribal areas' of the Caucasus: The North Caucasus - an enclave of 'alien civilisation' within the Russian Federation. OSW Study 34/2010

Militant Islam is currently the greatest threat to security and stability in the Russian part of the Caucasus. However, even though the armed Islamic underground is capable of organising terrorist attacks and carrying out actions of sabotage, it seems too weak to bring about any change in the Caucasus’s political status quo. Besides, militant Islam is merely a symptom (albeit the most radical and spectacular) of a much wider process, namely the widening civilisational gap between Russia and the North Caucasus, initiated by the collapse of the Soviet Union. The key elements of this process are as follows: the spontaneous re-Islamisation of social life and the dynamic growth of Islam's political influence; the de-Russification of the region; and the ongoing marginalisation of secular intellectuals. As a result, the North Caucasus, and principally Chechnya, Ingushetia and Dagestan, are turning into an enclave separated from the rest of the Russian Federation by a growing civilisational gap, and becoming increasingly different from the rest of Russia. This situation may recall the tribal areas of Pakistan inhabited by Pashtuns (FATA) along the Afghan border.

On the periphery of global jihad. The North Caucasus: the illusion of stabilisation. OSW Point of View Number 45, November 2014

The situation in the North Caucasus has stabilised, in comparison with previous years, mainly as regards the activity of the Islamic military underground. This is an effect of ideological changes among the militants which have led to a dilution of the Caucasian armed struggle and its marginalisation in global jihad, since top priority has been granted to the Middle Eastern front. The factors which have contributed to this stabilisation are the organisational crisis in the Caucasus Emirate and the outflux of militants to the Middle East, as well the successful ‘carrot and stick’ policy adopted by Moscow. However, the partial stabilisation in the Caucasus is inherently precarious, being a contingent outcome of the situation rather than the result of systemic change. The region’s pressing problems remain unresolved; and these problems are generating chronic instability and cauing the Caucasus to drift away from Russia in civilisational terms. An economic or political crisis in the Russian Federation may result in the conflicts in the Caucasus unfreezing, including a reactivation of the idea of Chechen independence as well as the idea of the Caucasus Emirate, which is a part of global jihad.