Results 221 to 230 of about 11,357 (263)

Deep Impact: Excavating Comet Tempel 1

Science, 2005
Deep Impact collided with comet Tempel 1, excavating a crater controlled by gravity. The comet's outer layer is composed of 1- to 100-micrometer fine particles with negligible strength (<65 pascals). Local gravitational field and average nucleus density (600 kilograms per cubic meter) are estimated from ejecta fallback.
A'Hearn, M., Belton, M., Delamere, W., Kissel, J., Klaasen, K., McFadden, L., Meech, K., Melosh, H., Schultz, P., Sunshine, J., Thomas, P., Veverka, J., Yeomans, D., Baca, M., Busko, I., Crockett, C., Collins, S., Desnoyer, M., Eberhardy, C., Ernst, C., Farnham, T., Feaga, L., Groussin, O., Hampton, D., Ipatov, S., Li, J., Lindler, D., Lisse, C., Mastrodemos, N., Owen, W., Richardson, J., Wellnitz, D., White, R.   +32 more
openaire   +3 more sources

Satellite-Based Monitoring of Urban Deep Excavations

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
This contribution explores satellite-based monitoring to evaluate the effects of excavation-induced subsidence on adjacent buildings. A methodology to overcome limitations in retrieving vertical displacement estimates from a single Interferometric Synthetic Aperture Radar (InSAR) measurement by utilising prior information about the subsidence field is ...
Stefan Ritter, Regula Frauenfelder, Malte Vöge   +2 more
openaire   +1 more source

Bayesian inference for deep excavations

2021
Accepted Author ...
de Wolf, W.J. (author), Korff, M. (author), van Seters, A. (author), van Dalen, J.H. (author)   +3 more
openaire   +2 more sources

Numerical Analysis of Deep Excavations

1998
Finite element calculations for predicting deformations due to deep excavations are presented. As it is a much debated issue how complex the constitutive model has to be in order to obtain the results required from the practical point of view a numerical study is made for a deep excavation.
M. G. Freiseder, H. F. Schweiger
openaire   +1 more source

Monitoring of deep excavations in Istanbul

2009
As a cosmopolitan city, Istanbul has a population over 12 million. Thus, new residences are needed to be built. However, there is also lack of space for buildings, especially for car parks and shops, so deep excavations are unavoidable. Two deep excavations neighboring important buildings are being excavated in Istanbul.
Saglamer A., Aslay Z.
openaire   +1 more source

3D Displacement Field Around a Deep Excavation

2021
The movements around a deep excavation in urban environment is one of the main design issue to be addressed. Various tools are available and they are categorized in different approaches. The first one, the semi-empirical approach, is based on empirical relations between displacements and simple geometrical parameters such as the depth of the excavation
Gianpiero Russo, Marco Valerio Nicotera
openaire   +2 more sources

On Safety Alarm in Deep Excavations

2018
Safety alarm method is the key to the deformation of deep excavation engineering control security technology. A new safety alarm system was put forward by the deformation behaviors of soil-rock mass because that the alarm value of control in the code was too preliminary, which could not effectively reflect the deformation state of deep excavation ...
Xue-shan Cao, Li-su E, Xi-yang Lai
openaire   +1 more source

NUMERICAL ANALYSIS OF DEWATERING PROCESS OF DEEP EXCAVATION

SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2018
&lt;p&gt;At present many new housing projects are being realized in Poland. They are often built in areas characterized by complex hydrogeological and geotechnical conditions. In such cases, the need to build deep excavations is complicated, especially when there is a high water table.
Grzegorz Wrzesiński, Jan Kowalski, Anna Miszkowska   +2 more
openaire   +1 more source

Deep excavations and retaining structures

2013
Many large construction projects need excavations and retaining structures for the construction of basements, foundations, pipelines, cables and cut-and-cover tunnels and other. Many different retaining systems are available for excavation pits. The design and construction of deep excavation pits have to regard the ultimate limit state (SLS) and the ...
Katzenbach R., Bergmann C., Clauss F., Leppla S.   +3 more
openaire   +1 more source

A study of a strut-free excavation system in deep excavations

2021
C.Y. Ou, A. Lim, P.G. Hsieh, S.C. Chien
openaire   +1 more source